image-forming method and inkjet recording device using the same

专利摘要:
IMAGE FORMATION METHOD AND INK JET RECORDING DEVICE USING THE SAME. An imaging method including applying an inkjet engraving processing fluid to both sides of a recording medium and, after applying the processing fluid, discharging ink on at least one side of the recording medium to form an image about him. The processing fluid for inkjet engraving comprises water and a water-soluble organic solvent.
公开号:BR102012023923B1
申请号:R102012023923-0
申请日:2012-09-17
公开日:2021-01-19
发明作者:Hidetoshi Fuji；Hiroshi Gotou
申请人:Ricoh Company, Ltd.；
IPC主号:

专利说明:

BACKGROUND OF THE INVENTION
This patent application is based on and claims priority under 35 U.S.C. §119 to Japanese Patent Applications Nos. 2011-201278 and 2012-193441, deposited on September 15, 2011, whose full disclosures are hereby incorporated by reference in this document. Field of the Invention
The present invention relates to an image-forming method and an inkjet recording device carrying out the image-forming method. Description of the Prior Art
The inkjet engraving method has been widely and quickly disseminated and used in recent years because it can form color images on plain paper, with low running costs.
However, this method also causes image deficiencies such as smeared ink (hereinafter referred to as diffusion) which causes significant deterioration in image quality depending on the particular combination of ink and recording medium involved.
Therefore, minimizing ink penetration has been attempted in an effort to reduce the occurrence of diffusion. However, this approach has problems due to the fact that the drying property of the paint deteriorates, which gets the hands dirty and blurs the image.
In addition, recording color images using the inkjet engraving method causes other problems. For example, since images printed with ink with different colors are superimposed on top of each other, the colors blur and blend in the color edge areas (hereinafter referred to as color bleeding), which significantly degrades the image quality.
Therefore, the ink penetration property has been improved in an attempt to solve the color bleeding problem. However, since the coloring agent penetrates deeply into the recording media, the density of the image decreases and the amount of ink that penetrates to the reverse side of the recording medium increases, thus avoiding the proper image printing in double printing.
To solve these two problems at the same time, imaging methods using fluid and ink processing are proposed to improve image quality.
For example, Japanese Order Publication No. 2001- 199151 (JP-2001-199151-A) describes a method of forming colored portions in the recording medium using a liquid composition in which particles with a charged surface with an inverted polarity in relation to that of the aqueous ink are dispersed; WO 00/06390 describes an imaging method, connecting an ink component and a first liquid containing polymer particles to a recording medium to improve the abrasion resistance of the formed image materials; JP-2007-276387-A describes a method of improving image density and the anti-stain fixation property by a combination of a cation polymer and an organic acid; and JP-2004-155868-A describes a method of improving image density by applying high viscosity processing fluid containing cation polymers.
In addition, since the speed of printing inkjet devices has increased dramatically in recent years, the drying properties of ink on the embossing, curling and wrinkling medium have become major problems.
To resolve these, for example, Japanese Patent No. 4487475 (JP-4487475-B) describes a method for providing a process for correcting the deformation of a recording medium
by applying heat or pressure on it; JP-2005-297549-A describes a method of increasing the content of an aqueous organic solvent, having an excellent moisture retention property; JP-H06-239013-A describes an ink drying method immediately after printing the ink; and JP-H11-002973-A describes a method of increasing the stiffness of a recording medium by applying processing fluid containing a material with crosslinking property to the recording medium.
Ripple, particularly backward ripple (a state in which the surface with the formed image deforms to the opposite side of the side with the formed image) is a major problem, because it causes obstruction when inverting a loose sheet (recording medium) in double printing.
As measures to be taken to solve this problem, JP-2010-184481-A describes a method of heating both sides of a recording medium separately; and JP-2007- 307763-A describes a method of reducing the ripple based on the image data.
However, these known technologies, in a broad sense, do not disclose a particular or specific composition of processing fluid particularly suitable for printing images on plain paper, without a layer coated with pigment ink. In addition, these technologies consume a large amount of energy and cannot solve the ripple problem satisfactorily. SUMMARY OF THE INVENTION
In view of the foregoing, the present invention provides an imaging method including an imaging method that applies a processing fluid for inkjet engraving to both sides of a recording medium, and then applies the processing fluid, discharging the ink on at least one side of the recording medium to form an image on it, wherein the processing fluid for the inkjet recording comprises water and a water-soluble organic solvent.
As another aspect of the present invention, an ink jet recording device is provided that includes an ink jet recording device configured to apply a processing fluid for recording the ink jet on both sides of a recording medium; and then applying the processing fluid, discharging ink on at least one side of the recording medium to form an image on it, wherein the processing fluid for inkjet recording comprises water and water-soluble organic solvent. BRIEF DESCRIPTION OF THE DRAWINGS
Various other objects, characteristics and auxiliary advantages of the present invention will be more fully perceived as it becomes better understood from the detailed description when considered together with the associated drawings in which similar reference characters designate similar corresponding parts throughout the document and wherein: Figure 1 is a schematic diagram illustrating an example of an inkjet engraving device of the present disclosure; Figure 2 is a schematic diagram illustrating another example of an inkjet recording device of the present disclosure; Figure 3 is a schematic diagram illustrating another example of an inkjet recording device of the present disclosure; Figure 4 is a schematic diagram illustrating another example of an inkjet recording device of the present disclosure; Figure 5 is an exploded perspective view illustrating a recording head related to an embodiment of the present disclosure; Figure 6 is a cross-section showing the mounted recording head shown in Figure 5; Figure 7 is a cross section on line A-A in figure 6; Figure 8 is a relational diagram illustrating the recording head nozzle and a method of transferring recording medium. Figure 9 is a view illustrating an example of a recording head, arranged in lines; Figure 10 is a schematic diagram showing an example of an applicator; Figure 11 is a schematic diagram that illustrates another example of an applicator; Figure 12 is a schematic diagram that illustrates another example of an applicator; Figure 13 is a plan view showing an example of an applicator; Figure 14 is a schematic diagram illustrating an example of an inkjet recording device (V); Figure 15 is a schematic diagram that illustrates an example of an inkjet recording device (VI); Figure 16 is a schematic diagram illustrating an example of an inkjet recording device (VII); and Figure 17 is a schematic diagram illustrating an example of an inkjet recording device (VIII); DETAILED DESCRIPTION OF THIS DISCLOSURE
The present disclosure is described in detail with reference to the preferred modalities.
Image formation method and Image Formation Apparatus
A device that forms images after applying the processing fluid to both sides (surfaces) of a recording medium is described with reference to figure 1.
Figure 1 is a diagram illustrating the configuration of the inkjet recording device of one embodiment of the present disclosure.
The inkjet recording device in this embodiment includes an inkjet recording unit 1, a first processing fluid applicator 2, a second processing fluid applicator 3, an inkjet printing transfer unit 4 , a sheet feeder 5 and a sheet feeder 6 and forms images by scanning all at once by the inkjet recording heads aligned.
In the inkjet recording device of figure 1, a recording medium 10 is sent from a sheet feeder 5 by a sheet feeder cylinder 11; the processing fluid is applied uniformly to the surface of the recording medium 10 where an image is formed secondarily by an application roller 40 and a counter roller 41 in the first processing fluid applicator 2; and after the recording medium 10 passes through a transfer path 30, the processing fluid is uniformly applied to the surface of the recording medium 10 on which an image is first formed by the application roller 40 and the counter roller 41 in the second processing fluid applicator 3.
The first process fluid applicator 2 and the second process fluid applicator 3 have a mechanism in which the process fluid is pulled by a drawing roller 42 from a process fluid tank 43 to be uniformly applied to the application cylinder. 40. The time between when the processing fluid is applied to the first processing fluid applicator 2 and when the processing fluid is applied to the second processing fluid applicator 3 is controlled by the transfer rate. The recording medium 10 to which the processing fluid is applied is transferred to the inkjet recording unit 1.
The inkjet recording unit 1 is configured by several recording heads, in which the nozzles are arranged to have a particular resolution in the direction of sub-sweeping by the type of ink. A recording head 20 records an ink image on the recording medium 10, transferred to the recording position by a transfer roller 12.
The recording head 20 includes fine ink discharge nozzles, a liquid path and a device from the part of the liquid path that discharges droplets by the pressure of a piezoelectric element that elongates and contracts due to an applied voltage. The recording head is submitted in detail.
Ink transfer tubes are connected with each ink tank that accommodates a yellow, magenta, cyan and black ink to discharge (spray) yellow, magenta, cyan and black ink. Under the recording head 20, an ink retainer is provided which collects the waste ink produced during head cleaning and is connected with a waste ink tank.
The ink retained in the ink retainer is collected in the waste ink tank by an ink collection pump.
Under the recording head 20, the inkjet print transfer unit 4 is provided between the transfer roller 12 and a discharge roller 13.
The inkjet print transfer unit 4 has a continuous belt that serves as a transfer member of the recording medium 10 and is suspended on multiple rolls formed from a transmission roller 26a and a driven roller 26b.
The inkjet print transfer unit 4 is configured to transfer the recording medium 10 fed from the sheet feeder 5 to the discharge roller, while attracting the recording medium 10 to the continuous belt by driving the printing roller. transmission 26a and an extraction fan.
The discharge roller discharges the recording medium 10, on which the ink image is recorded, from the recording position.
A wing 12 is a member for changing the discharge path of the recording medium 10 accordingly, depending on the single or double mode.
The sheet feeder 6 is a transfer unit for providing the recording medium 10 on which the ink image is recorded on one side to the rewrite position in dual mode.
A suitable reversing roller 14 changes the transfer direction of the recording medium 10. The wing 21 changes the transfer direction of the recording medium 10 discharged from the recording position to a transfer route 31 to supply it back to the position recording again. The recording medium 10, on which the ink image is recorded, is stacked in a discharge unit 7.
The recording medium 10 on which the ink image is recorded is guided to the wing 21 by the discharge roller 13.
In the case of dual mode, the wing 21 guides the recording medium 10 in the direction indicated by an arrow A in figure 1 and sends it to the sheet feeder 6 via transfer route 31. The recording medium 10 which has been fed to the sheet feeder 6 is sent to a reversing pocket 23 by the appropriate reversing roller 14.
When the recording medium 10 is sent in the reversal pocket 23, a wing 22 changes the transfer direction of the recording medium 10 to send it in the direction indicated by an arrow C, in figure 1.
After the transfer direction is changed, the appropriate reversal roller 14 rotates inversely with respect to its direction of rotation when sending the recording medium 10 in the reversing pocket 23 and unloading the recording medium 10 from the reversing pocket 23.
The recording medium 10 discharged from the reversal pocket 23 is guided to the transfer roller 12 via an S-shaped transfer route 32 and is transferred back to the recording position on the inkjet print transfer unit 4 transfer roller 12.
The recording head 20 records another ink image on the reverse side of the recording medium 10 transferred back again to the recording position for the side on which the ink image has already been printed.
The recording medium 10 on which the ink images are recorded on both sides is guided to the wing 21 by the discharge roller 13.
After recording the ink images on both sides of the recording medium 10, the wing 21 guides the recording medium 10 in the direction indicated by an arrow B in figure 1 and transfers the recording medium 10 upwards along a route of transfer 33 to discharge it into the discharge unit 7, where the recording medium 10 is stacked.
In the case of simple mode, after recording an ink image on one side of the recording medium 10, the wings 21 guide the recording medium 10 in the direction indicated by the arrow B to transfer it upwards along a route of transfer 33 and unload it immediately into the discharge unit 7, where the recording medium 10 is stacked.
With such a configuration, the images are formed by the inkjet recording head 20 in the state in which the application of the liquid is made on both sides of the recording medium 10.
Thus, since the difference in humidity between the upper side and the lower side of the recording medium 10 is smaller, the ripple of the recording medium 10 that occurs when forming an image can be reduced.
In addition, by applying the processing fluid to the side of the recording medium 10 on which an image is formed first to cause the difference in the amount of processing fluid between the upper side and the lower side of the recording medium 10, the recording medium 10 curls, which prevents the backward curling of the recording medium, by forming an image on one side on which the image is formed first.
Figure 2 is a diagram illustrating another example of the configuration of the inkjet engraving apparatus of another embodiment.
The difference between this example and that of Figure 1 is that, after applying the processing fluid to the side where an image is formed first in the first processing fluid applicator 2, the second processing fluid applicator
processing 3 applies the processing fluid to the side on which an image is formed secondarily.
In this configuration, the recording medium 10 is sent from the sheet feeder 5 by the sheet feeder roll 11; the processing fluid is uniformly applied to the side of the recording medium 10, on which an image is first formed by the application roller 40 and the counter roller 41 in the first processing fluid applicator 2; and after the recording medium 10 passes through the transfer route 30, the processing fluid is uniformly applied to the surface of the recording medium 10, on which an image is formed secondarily by the application roller 40 and the counter roller 41 in the second processing fluid applicator 3.
The recording medium 10 to which the processing fluid is applied is transferred to the inkjet recording unit 1.
The inkjet recording device illustrated in Figure 2 is the same as that illustrated in Figure 1, except for the process of feeding the recording medium 10 to transfer the recording medium 10 to the inkjet recording unit 1 .
With such a configuration, the images are formed by the inkjet recording head 20 in the state in which the application of liquid is made on both sides of the recording medium 10, in the same way as in Figure 1.
Thus, since the difference in humidity between the upper side and the lower side of the recording medium 10 is smaller, the ripple of the recording medium 10 that occurs when forming an image can be reduced.
Figure 3 is a diagram illustrating another example of the configuration of the ink jet recording device of another embodiment.
The difference between the devices illustrated in Figures 1 and 2 is that only the first process fluid applicator 2 is provided without the second process fluid applicator 3 and the leaf feeder route 6 is connected between the first flow fluid applicator. processing 2 and the sheet feeder 5.
In this configuration, the recording medium 10 is sent from the sheet feeder 5 by the sheet feeder roll 11; the processing fluid is uniformly applied to the surface of the recording medium 10, on which an image is first formed by the application roller 40 and the counter roller 41 in the first processing fluid applicator 2; and the recording medium 10 passes through the inkjet print transfer unit 4 and is guided to the sheet feeder 6 by the discharge roller 13 and the wing 21.
The recording medium 10 which has been fed to the sheet feeder 6 is sent to the reversing pocket 23 by the appropriate reversing roller 14.
When the recording medium 10 is sent in the reversal pocket 23, the wing 22 changes the transfer direction of the recording medium 10 in the direction indicated by an arrow C, in figure 3.
After the transfer route has been changed, the appropriate reversing roller 14 rotates inversely with respect to its direction of rotation, by sending the recording medium 10 into the reversing pocket 23 and unloading the recording medium 10 from the reversing pocket 23 .
The recording medium 10 discharged from the reversal pocket 23 is guided to a transfer roller 15 via the S-shaped transfer route 32. The processing fluid is applied uniformly again to the surface of the recording medium 10 on which an image it is formed secondarily by the application roller 40 and the counter roller 41 in the first processing fluid applicator 2.
Thereafter, the recording medium 10 is transferred to the inkjet recording unit 1 and an ink image is formed by the recording head 20.
The recording medium 10 is guided to the wing 21 by the discharge roller 13. In the case of the simple mode, an ink image is recorded on one side of the recording medium 10 and then the wing 21 guides the recording medium 10 towards the direction indicated by the arrow B in Figure 3 to transfer it upwards along the transfer route 33 and immediately unload it in the unloading unit 7, where the recording medium 10 is stacked in sequence.
In the case of dual mode, the wing 21 guides the recording medium 10 in the direction indicated by an arrow A in the figure. 3 and sends it to the sheet feeder 6 via transfer route 31.
The recording medium 10 which has been fed to the sheet feeder 6 is sent to the reversing pocket 23 by the appropriate reversing roller 14.
When the recording medium 10 is sent in the reversal pocket 23, the wing 22 changes the transfer route to send the recording medium 10 in the direction indicated by the arrow C in Figure 3. After the transfer route is changed, the transfer roller suitable reversal 14 rotates inversely with respect to its direction of rotation, by sending the recording medium 10 into the reversal pocket 23 and unloading the recording medium 10 from the reversal pocket 23.
The recording medium 10 that has been discharged from the reversal pocket 23 is guided to the transfer roller 15 via an S-shaped transfer route 32.
After the recording medium 10 is sent from the transfer roller 15 to the first processing fluid applicator 2, the processing fluid is uniformly applied to the surface of the recording medium 10 on which an image is first formed by the application roller 40 and the counter roller 41 in the first processing fluid applicator 2.
Thereafter, the recording medium 10 is transferred to the inkjet recording unit 1 and an ink image is formed on the other side of the recording medium by the recording head 20.
At this point, if a mechanism is provided that releases pressure between the application roller and the counter roller of the processing fluid applicator, or if a mechanism is provided that separates the application roller from the drawing roller, it is possible to avoid reapplication. of the processing fluid to the surface on which the image is first formed.
The recording medium 10 on which the ink images are recorded on both sides is guided to the wing 21 by the discharge roller 13.
After recording the ink images on both sides of the recording medium 10, the wing 21 guides the recording medium 10 in the direction indicated by an arrow B in figure 3 and transfers the recording medium 10 upwards along the transfer route. 33 to discharge it into the discharge unit 7, where the recording medium 10 is sequentially stacked.
Figure 4 is a diagram illustrating another example of the configuration of the ink jet recording apparatus of another embodiment.
The difference between the devices illustrated in Figures 1 and 2 is that both the first process fluid applicator 2 and the second process fluid applicator 3 are not provided, however a process fluid applicator on both sides 8 is provided.
In this configuration, the recording medium 10 is sent out of the sheet feeder 5 by the discharge roller 11 and the processing fluid applicator on both sides 8 applies the processing fluid to both sides of the recording medium 10. Then in addition, the recording medium is transferred to the inkjet recording unit 1 and an ink image is formed by the recording head 20.
The inkjet recording device illustrated in Figure 4 is the same as that illustrated in Figure, except for the application of the processing fluid to both sides of the recording medium at the same time in the process of feeding the recording medium 10 to transfer the recording medium 10 for the inkjet recording head 1.
With such a configuration, the configuration becomes simple since the respective application rolls serve as the counter rolls for the application rolls on the other side in relation to the recording medium 10, thereby reducing the number of parts and saving space To the feet.
As is evident from the process of transferring the recording medium of this device, after applying the processing fluid to the recording medium, it is necessary to transfer the recording medium, to which the processing fluid is applied by a device such as a roller. and a guide that comes into contact with the recording medium, in most cases.
If the processing fluid given to the recording medium is transferred to the transfer device for the recording medium, problems arise, so that the transfer characteristic is damaged and the contamination accumulates, thereby degrading the image quality.
To avoid the occurrence of such problems, it is possible to reduce the impact of such problems by taking measures, for example, to use a corrugated plate as a guide, a roller having a spike shape with a surface made of a water-repellent material.
However, it is preferable that the processing fluid given to the recording medium is absorbed as soon as possible to make the surface of the recording medium appear dry.
To achieve this goal, it is good to use a processing fluid having a surface tension of 40 mN / m or less so that the processing fluid penetrates quickly into the recording medium. "Drying and solidifying" after applying (supplying) the processing fluid to the recording medium does not mean that the recording medium appears dry, as described above, but rather that liquid compounds such as water in the processing fluid evaporate to the degree that the Processing fluid cannot maintain a liquid state and is solidified.
By using the recording device having both the processing fluid applicator that applies a treatment fluid together with an image forming device, the ink jet recording can be carried out in the state in which the processing fluid is absorbed into the medium of recording and looks dry, but it solidifies on it and the image quality can be significantly improved with the use of even a small amount of the processing fluid.
The operation of the device as illustrated in Fig. 1 is controlled, for example, by a computer when a print instruction is received from it, the recording device starts heating the heating roll, cleaning the head and applying the processing fluid at the same time and when everything is done, the recording images are started.
By processing the processing fluid application, cleaning the head, checking ink discharge, processing data and transferring image data in parallel, images can be recorded without reducing the transfer rate of the print recording device, even when the processing fluid is applied.
The inkjet engraving device of this modality is suitable for cut sheets in particular because the cut sheet is a recording medium that tends to have curl and wrinkle problems.
The cut sheets in general include the following: size A3 (297 mm x 420 mm), size A4 (210 mm x 297 mm), size A5 (148 mm x 210 mm), size A6 (105 mm x 148 mm), size B4 (257 mm x 364 mm), size B5 (182 mm x 257 mm), size B6 (128 mm x 182 mm), letter size (215.9 mm x 279.4 mm) and official size (215.9 mm x 355.6 mm). In the inkjet recording device of this mode, the processing fluid is applied to both sides of the recording medium before ink is applied to it by the inkjet recording device to reduce the difference in the amount of moisture between the upper side and lower side of the recording medium 10 when the ink is applied, thus reducing the occurrence of clogging caused by the ripple. Inkjet engraving head
The inkjet recording head related to the present disclosure is suitable for recording on demand.
Figures 5 to 7 are diagrams that illustrate the details of the recording head. Figure 5 is an exploded perspective view, Figure 6 is a cross section of the mounted recording head portion, and Figure 7 is a cross section in relation to line A-A of Figure 6.
In these figures, 71 represents a nozzle, 72 represents a nozzle plate, 73 represents a compressed air installation, 74 represents a compressed air installation plate, 75 represents a limiter, 76 represents a limit plate, 77 represents a diaphragm, 78 represents a filter, 79 represents a diaphragm plate, 80 represents a hollow portion, 81 represents a support plate, 82 represents a shared liquid path, 83 represents a box, 84 represents an adhesive, 85 represents a piezoelectric driver, 86 represents a piezoelectric vibrator, 87 represents an external electrode, 88 represents an electroconductive adhesive, 89 represents a support substrate, 90 represents an individual electrode, 91 represents a shared electrode, 92 represents a through hole and 93 represents a liquid induction tube.
As shown in figure 5, in this type-on-demand recording the head has the nozzle plate 72, the compressed air installation plate 74, limiting plate 76, the diaphragm plate 79, the support plate 81, the box 83 and the piezoelectric driver 85.
The nozzle plate 72 having several nozzles 71 in a row is manufactured by an electroplating processing method for nickel material and a precision press processing method a laser method for stainless steel material, etc.
The compressed air installation 73 corresponding to the nozzle 71 is formed on the compressed air installation plate 74, which is in communication with the nozzle 71.
As shown in figure 5, the limiting plate 76 is in communication with the shared liquid path 82 and the compressed air installation 73 and has the limiter 75 to control the amount of liquid flow to the compressed air installation 73.
The compressed air installation plate 7 4 and the limiting plate 76 are manufactured by a caustication method for stainless steel material, an electroplating processing method for nickel material, etc.
The diaphragm plate 79 has a diaphragm 77 to efficiently transmit the pressure from the piezoelectric vibrator 86 to the compressed air installation 73 and the filter 78 to remove foreign objects in the liquid flow from the shared liquid path 82 to the limiter 75.
Diaphragm plate 79 is manufactured by a caustication method for stainless steel material, an electroplating processing method for nickel material, etc.
The support plate 81 has the hollow portion 80 to determine the position of the vibration fixing end of diaphragm 77 and to prevent an adhesive 84 that has overflowed from the adhesive portion from spreading over diaphragm 77 when diaphragm 77 and piezoelectric vibrator 86 are fixed with adhesive 84.
Support plate 81 is manufactured by a caustication method for stainless steel material, an electroplating processing method for nickel material, etc.
The box 83 made of metal or synthetic resins has the shared liquid path 82 and the tubes are connected to the shared liquid path 82 to supply the paint for this.
The ink passes through the filter 78 in the middle of the shared liquid head of the recording head and flows steadily from the stop 75, from the compressed air installation 73 to the nozzle 71, in this sequence.
The piezoelectric vibrator 86 elongates and contracts by applying a pulse voltage between the separate electrode 90 and the shared electrode 91 and returns to the state before stretching and contraction, when the application of the pulse voltage is interrupted.
Such transformation of the piezoelectric vibrator 86 transmits pressure instantly to the processing fluid in the compressed air installation 73 to discharge the ink from the nozzle as droplets, which land on the recording medium 10.
Any droplet size can be discharged by selecting the magnitude and type of pulse voltage applied.
Figure 8 is a plan view showing the relationship between the position of the recording head nozzles and the transfer direction of the recording medium 10. Figure 9 is a diagram illustrating the arrangement of the multiple recording heads arranged in line.
As shown in figures 8 and 9, nozzles 71 are formed with a step P on the recording head and a step Q in the direction of sub-sweep of the transfer direction by tilting the recording head at an angle of inclination θ.
As illustrated in figures 8 and 9, by the arrangement of the multiple recording heads having a small size, it is possible to form an image in any range of length by scanning at once. Process Liquid Applicator
Figures 10, 11 and 12 are schematic diagrams illustrating examples of the present disclosure, and Figure 13 is a plan view showing an example of the applicator;
As shown in figures 10, 11 and 12, the process fluid applicator has an application roller that conducts the processing fluid, a counter roller that contacts the application roller and rotates in the opposite direction to that of the application roller. , a drawing roll having a roll of which a part immersed in the processing fluid is stored in a processing fluid container to remove the processing fluid while stirring the processing fluid and conducts the processing fluid to the surface of the processing fluid. design, and a processing fluid tank that stores a large amount of processing fluid to supply the processing fluid to the processing fluid container.
In Figures 10 and 11, the processing fluid drawn by the drawing roller is supported on the surface of the application roller. The application roller and the counter roller come into contact with each other with uniform pressure, so that the processing fluid is applied to the recording medium 10 on the side of the application roller with a uniform thickness.
In Figure 12, once the two application rollers come into contact with uniform pressure, the process is applied to the recording medium 10 on the side of the application roll with a uniform thickness.
An elastic member 44 such as an eraser is provided between the processing fluid container and the drawing roll while in contact with the drawing roll to prevent spreading of the processing fluid caused by the drawing roll, reduces evaporation of the drawing fluid. processing and clean the drawing roll.
It is possible to control the amount of application of the processing fluid arbitrarily by controlling the material of the application roller and the counter roller and the pressure between them, the type of recording medium 10, the application speed, the
viscosity of the processing fluid and its penetration property.
It is also possible to make the processing fluid driven on the application roller uniform and to control the amount of processing fluid by providing a layer thickness control roller between the drawing roller and the application roller.
As shown in figures 2 and 3, the processing fluid applicator possibly applies the processing fluid to the upper and lower side of the recording medium 10, even when the recording medium 10 is transferred vertically, adjusting the arrangement of the processing roller. application, the counting roller and the drawing roller.
Processing Process Although the roll coating method is already described as the process fluid application process of the present disclosure, there are no limitations to the method of applying the processing fluid to the surface of the recording medium and any application method. of uniform processing fluid can be used properly.
Specific examples of such application methods include, but are not limited to, a sheet coating method, an engraving coating method, an engraving lithographic coating method, a bar coating method, a roller coating method , a foil coating method, an air foil coating method, a comma coating method, a U comma coating method, an AKKÜ coating method, a smoothing coating method, a microgravure coating method, a reverse roller coating method, a four or five roller coating method, a dip coating method, a curtain coating method, a slip coating method and a mold coating method.
In particular, it is preferable to immerse a rotating body in the processing fluid and to contact the immersed rotating body with the recording medium 10 in terms of which the processing fluid is uniformly applied.
The amount of wet binding of the processing fluid to the recording medium in the processing preferably ranges from 0.1 g / m2 to 30.0 g / m2 and, more preferably, from 0.2 g / m2 to 10.0 g / m2.
When the amount of fixation is very small, the quality of the image (such as image density, color saturation, color bleeding, text blurring and white spots) tend to be slightly improved. When the amount of fixation is very large, the texture like plain paper tends to be lost and curl and wrinkling tend to occur.
As another method of applying the processing fluid, it is possible to apply the processing fluid to the entire recording medium in the same way as the ink via the inkjet recording head. However, there are limitations to the viscosity, surface tension and liquid contact property of the processing fluid to discharge and apply the processing fluid via the inkjet recording head.
In the event that droplets discharged from the recording head are applied over the entire surface, the applied state is not uniform without greatly increasing the definition of the discharged processing fluid. Processing Liquid (Liquid Dispersant)
The processing fluid of the present disclosure contains at least one water-soluble organic solvent and water.
Preferably, a water-soluble binding agent and a surface active agent are added in suitable amounts. Water Soluble Organic Solvent
Specific examples of the water-soluble organic solvent include, but are not limited to, polyols, alkyl polyol ethers, aryl polyol ethers, nitrogen-containing heterocyclic compounds, amides, amines, sulfur-containing compounds, propylene carbonates and ethylene carbonate.
As the water-soluble organic solvent contained in the processing fluid, it is necessary that the amount of the water-soluble organic solvent having a high equilibrium humidity is small.
By reducing the content of water-soluble organic solvent with a high amount of equilibrium moisture, the processing fluid and ink dry quickly in the recording medium.
In the present disclosure, the water-soluble organic solvent with a high equilibrium moisture content (hereinafter referred to as the water-soluble organic solvent A) represents a water-soluble organic solvent having an equilibrium moisture content of 30% by weight or more and, preferably, 40% by weight or more at 23 ° C and 80% RH.
Since the water-soluble organic solvent A retains a large amount of water, the viscosity of the processing fluid does not increase much even when the moisture evaporates and reaches equilibrium moisture, while the processing fluid is left unfinished.
The equilibrium moisture content of the water-soluble organic solvent represents the amount of water obtained in it when a mixture of the water-soluble organic solvent and water is released into the air at constant temperature and humidity and the evaporation of water in the solution and the absorption of water in the air. in the solution are in an equilibrium condition.
To be specific, the equilibrium moisture content can be obtained as follows: during the maintenance of temperature and humidity in a desiccator using a saturated potassium chloride solution in the range of 22 ° C to 24 ° C and 77% for 83%, respectively, a petri dish in which 1 g of each of the water-soluble organic solvents is placed and preserved in the desiccator until no change in mass is observed followed by the calculation based on the following Ratio 1. Equilibrium moisture content ( %) = {amount of moisture absorbed in organic solvent / (content of organic solvent + amount of moisture absorbed in organic solvent)} x 100 Ratio 1
As a water-soluble organic solvent A suitably for use in the present disclosure, polyols with an equilibrium moisture content of 30% by weight or more in an environment of 23 ° C and 80% RH are suitable.
Specific examples of water-soluble organic solvent A include, but are not limited to, 1,2,3-butanotriol (boiling point: 175 ° C / 33 hPa, equilibrium moisture content: 38% by weight), 1, 2, 4-butanotriol (boiling point: 190 ° C to 191 ° C / 24 hPa, equilibrium moisture content: 41% by weight), glycerin (boiling point: 290 ° C, equilibrium moisture content: 49% per weight), diglycerin (boiling point: 270 ° C / 20 hPa, equilibrium moisture content: 38% by weight), triethylene glycol (boiling point: 285 ° C, equilibrium moisture content: 39% by weight), tetraethylene glycol (boiling point: 324 ° C to 330 ° C, equilibrium moisture content: 37% by weight), diethylene glycol (boiling point: 245 ° C, equilibrium moisture content: 43% by weight) and 1, 3-butanediol (boiling point: 203 ° C to 204 ° C, equilibrium moisture content: 35% by weight).
The content of the water-soluble organic solvent A is suitably 5% by weight or less.
In the present disclosure, in addition to the water-soluble organic solvent A with a high equilibrium moisture content, it is suitable to use water-soluble organic solvent (hereinafter referred to as the water-soluble organic solvent B) having a low equilibrium moisture content in combination.
By a combined use of water-soluble organic solvent A and water-soluble organic solvent B, the processing fluid penetrates the recording medium quickly.
Specific examples of the water-soluble organic solvent B include, but are not limited to, isobutyldiglycol (boiling point: 220 ° C, equilibrium moisture content: 10% by weight), monomethyl tripropylene glycol (boiling point: 242 ° C, content of equilibrium humidity: 13% by weight), 2— (2— isopropyloxyoxy) ethanol (boiling point: 207 ° C, equilibrium moisture content: 18% by weight), isopropylglycol (boiling point: 142 ° C, content equilibrium moisture content: 15% by weight), diethyldiglycol (boiling point: 189 ° C, equilibrium moisture content: 10% by weight), propylpropylene glycol (boiling point: 150 ° C, equilibrium moisture content: 17 % by weight), dibutyldiglycol (boiling point: 189 ° C, equilibrium moisture content: 12% by weight), butylpropylene glycol (boiling point: 170 ° C, equilibrium moisture content: 6% by weight), acetate methylpropylene glycol (boiling point: 146 ° C, equilibrium moisture content: 8% by weight), tributyl citrate (boiling point: 234 ° C, content equilibrium moisture content: 4% by weight), propylpropylene glycol (boiling point: 220 ° C, equilibrium moisture content: 5% by weight), butylpropylene glycol (boiling point: 170 ° C, equilibrium moisture content: 6 % by weight), butylpropylene glycol (boiling point: 212 ° C, equilibrium moisture content: 3% by weight), methylpropylene glycol acetate (boiling point: 146 ° C, equilibrium moisture content: 8% by weight) and triethylene glycolimethyl ether (boiling point: 216 ° C, equilibrium moisture content: 20% by weight) and 2-methyl-1,3-butanediol (boiling point: 203 ° C, equilibrium moisture content: 23% by weight).
The following can also be used with the organic solvent.
Dipropylene glycol (boiling point: 232 ° C), 1,5-pentanediol (boiling point: 242 ° C), propylene glycol (boiling point: 187 ° C), 2-methyl-2,4-pentanediol (boiling point : 197 ° C), ethylene glycol (boiling point: 196 ° C to 198 ° C), tripropylene glycol (boiling point: 267 ° C), hexylene glycol (boiling point: 197 ° C), polyethylene glycol (viscous liquid to solid ), polypropylene glycol (boiling point: 187 ° C), 1,6-hexanediol (boiling point: 253 ° C to 260 ° C), 1,2,6-hexanotriol (boiling point: 178 ° C), trimethylolethane (solid; melting point: 199 ° C to 201 ° C) and trimethylolpropane (solid; melting point: 61 ° C).
Specific examples of alkyl polyol ethers include, but are not limited to, monoethyl ethylene glycol ether (boiling point: 135 ° C), monobutyl ethylene glycol ether (boiling point: 171 ° C), monomethyl diethylene glycol ether (boiling point: 194 ° C), monoethyl diethylene glycol ether (boiling point: 197 ° C), monobutyl diethylene ether (boiling point: 231 ° C), mono-2-ethylhexyl ethylene glycol ether (boiling point: 229 ° C) and propylene glycol ether (monoethyl ether) boiling point: 132 ° C).
Specific examples of aryl polyol ethers include, but are not limited to, monophenyl ethylene glycol ether (boiling point: 237 ° C) and monobenzyl ethylene glycol ether.
Specific examples of nitrogen-containing heterocyclic compounds include, but are not limited to, 2-pyrrolidone (boiling point: 250 ° C, melting point: 25.5 ° C, 47% by weight to 48% by weight), N- methyl-2-pyrrolidone (boiling point: 202 ° C), 1,3-dimethyl-2-imidazolidinone (boiling point: 226 ° C), D-caprolactam (boiling point: 270 ° C) and Y-butyrolactone (boiling point: 204 ° C to 205 ° C).
Specific examples of amides include, but are not limited to, formamide (boiling point: 210 ° C), N-methylformamide (boiling point: 199 ° C to 201 ° C), N, N-dimethylformamide (boiling point: 153 ° C) and N, N-diethylformamide (boiling point: 176 ° C to 177 ° C).
Specific examples of amines include, but are not limited to, monoethanolamine (boiling point: 170 ° C), diethanolamine (boiling point: 268 ° C), triethanolamine (boiling point: 360 ° C), N, N-dimethylmonoethanolamine (boiling point: 139 ° C), N-methyldiethanolamine (boiling point: 243 ° C), N-methylethylethanolamine (boiling point: 159 ° C), N-phenylethanolamine (boiling point: 282 ° C at 287 ° C) and 3-aminopropylethylamine (boiling point: 169 ° C).
Specific examples of sulfur-containing compounds include, but are not limited to, dimethyl sulfoxide (boiling point: 139 ° C), sulfolane (boiling point: 285 ° C) and thiodiglycol (boiling point: 282 ° C).
The content of the water-soluble organic solvent is from 20% by weight to 60% by weight to reduce the occurrence of curling.
When the content is very small, the penetration property of the processing fluid tends to deteriorate, which is disadvantageous to avoid curling.
When the content is very large, the drying property of the processing fluid tends to deteriorate, which is disadvantageous to avoid curling. Water Soluble Agglomeration Agent
As the water-soluble agglomeration agent for use in the present disclosure, water-soluble organic acids, composed of ammonium salt of water-soluble organic acids, compounds of water-soluble metal salts and water-soluble cationic polymers.
When the processing fluid to which the water-soluble agglomerating agent is added comes into contact with the ink to engrave in an inkjet medium, anionic pigments are fixed by the agglomeration caused by the salting-out effect or acid deposition, thus reducing the occurrence of color diffusion and bleeding.
Aliphatic water-soluble organic compounds are preferable as water-soluble organic acid.
Specific examples of water-soluble aliphatic organic compounds include, but are not limited to, lactic acid (pKa: 3.83), malic acid (pKa: 3.4), citric acid (pKa: 3.13), tartaric acid (pKa: 2.93), oxalic acid (pKa: 1.04, malonic acid (pKa: 2.05), succinic acid (pKa: 4.21), adipic acid (pKa: 4.42), acetic acid (pKa: 4 , 76), propionic acid (pKa: 4.87), butyric acid (pKa: 4.82), valeric acid (pKa: 4.82), gluconic acid (pKa: 2.2), pyruvic acid (pKa: 2.49) and fumaric acid (pKa: 3.02).
As ammonium salts of water-soluble organic acid, ammonium salts of water-soluble aliphatic organic acids are preferable. Specific examples of ammonium salts of water-soluble aliphatic organic acids include, but are not limited to, ammonium acetate, ammonium lactate, ammonium propionate and butanedioic ammonium.
Like metal salt compounds, water-soluble polyvalent metal salt compounds and monoalkaline metal salt compound are suitable. Specific examples of water-soluble polyvalent metal salts include, but are not limited to, magnesium sulphate, aluminum sulphate, manganese sulphate, nickel sulphate, ferric (II) sulphate, copper (II) sulphate, zinc sulphate, nitride iron (II), iron (III) nitride, cobalt nitride, strontium nitride, copper (II) nitride, nickel (II) nitride, lead (II) nitride, manganese nitride (II), nitride calcium (II), nickel (II) chloride, calcium chloride, tin (II) chloride, calcium chloride, tin (II) chloride, strontium chloride, barium chloride and magnesium chloride.
Specific examples of the water-soluble monoalkaline metal salt compound include, but are not limited to, sodium sulfate, potassium sulfate, lithium sulfate, sodium hydrogen sulfate, potassium hydrogen sulfate, sodium nitrite, potassium nitrite, sodium carbonate, potassium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, sodium chloride and potassium chloride. As water-soluble metal salt compounds, water-soluble polymetal salts are preferable. Like water-soluble cationic polymers, quaternary ammonium salt-type cationic polymers are preferable.
Specific examples of cationic polymers like quaternary ammonium salt include, but are not limited to, dialkylaryl ammonium chloride polymers, dialkylaminoethyl (meth) acrylate quaternary ammonium salt polymers, dialkylammonium polyvinyl alcohol salt polymers and dialkylaryl ammonium salt polymers .
Specific examples of other cationic polymers 5 include, but are not limited to, cationic epichlorohydrin condensing compounds, specifically modified cationic polyamine compounds, cationic polyamine polyamide compounds, cationic urea-formalin resin compounds, cationic alkyl ketene dimers, 10 cationic dicyanodiamide compounds, cationic diamide-formalin diciano condensation compounds, cationic diamide-polyamine condensation compounds, cationic polyvinylformamide compounds, cationic polyvinylpyridine compounds, 15 cationic polyalkylene polyamine compounds and epoxyl polyamide polyamide compounds.
Among these, the compounds represented by the following Chemical Structures are particularly preferable.

Chemical Structure 1 In chemical structure 1, "R" represents a methyl group or an ethyl group and "X-" represents a halogen ion. "n" represents an integer.
Chemical Structure 2 In chemical structure 2, "X-" represents a negative ion of a halogen ion, nitric acid ion, nitrite ion or acetic acid ion, "R3" represents H or CH3, R3, R4 and R5 independently represent H or alkyl groups. "n" represents 10 an integer and "m" represents an integer from 1 to 3.

Chemical Structure 3 In chemical structure 3, "R" represents a methyl group 15 or an ethyl group, "X-" represents a negative ion of a halogen ion, nitrous acid ion or acetic acid ion. "n" represents an integer.
Cationic polymers agglomerate the coloring material and hydrodispersible resins in the ink and leave the coloring material on the surface of plain paper, thereby increasing the density of the image and reducing the blurring of the text.
As water-soluble agglomerating agents, water-soluble organic acids, their ammonium salts and multipurpose metal salts are preferable.
Among these, water-soluble organic acids and their ammonium salts are particularly preferable.
The amount of addition of the water-soluble binding agent is preferably from 0.1% by weight to 30% by weight, and more preferably from 1% by weight to 20% by weight based on the total amount of processing fluid as the effective component. .
When the amount of addition is very large, the water-soluble organic compound tends not to be sufficiently dissolved, but it precipitates. When the amount of addition is very small, the image density is not easily improved.
Surface Active Agent As surface active agents for use in the processing fluid, at least one surface active agent selected from the group consisting of silicone based surface active agents is chlorine-containing surface active agents are preferred. These surface active agents can be used alone or in combination.
Specific examples of fluorine-containing surface active agents for use in the processing fluid include, but are not limited to, SURFLON S-lll, SURFLON S-112, SURFLON S-113, SURFLON S-121, SURFLON S-131, SURFLON S -132, SURFLON S-141 and SURFLON S-145 (all manufactured by ASAHI GLASS CO., Ltd.); FLUORAD FC-93, FC-95, FC-98, FC-129, FC-135, FC-170C, FC-430, FC-431 and FC-4430 (all manufactured by SUMITOMO 3M); MEGAFAC F-470, F-1405, F-474 and F-444 (all manufactured by DIC CORPORATION); ZONYL FS-300, FSN, FSO-100, and FSO (all manufactured by DU PONT KABUSHIKI KAISHA); and F-top EF-351, EF-352, EF-801 and EF-802 (all manufactured by Mitsubishi Materials Electronic Chemicals Co., Ltd.).
Among these, ZONYL FS-300, FSN, FSO-100 and FSO (all manufactured by DU PONT KABUSHIKI KAISHA) are particularly suitable in terms of reliability and improved color.
Specific examples of silicone-based surface active agents include, but are not limited to, KF-351A,
KF-353A, KF-354L, KF-355A, KF-615A, KF-640, KF-642, KF-643 and KF-6011 (all manufactured by Shin-Etsu Chemical Co., Ltd.); SILICONE FZ-77 , FZ-2104, FZ-2105 and L-7604 (all manufactured by DOE CORNING TORAY CO., LTD.) ..
Among these, KF-355A, KF-640, KF-642 and KF-643 (all manufactured by Shin-Etsu Chemical Co., Ltd.) are particularly suitable in terms of reliability and improvement in coloring.
The content of the surface active agents in the processing fluid is preferably from 0.01% by weight to 3.0% by weight and, more preferably, from 0.5% by weight to 2% by weight.
When the content is very small, the effect of the surface active agent tends to be weak. Content that is too large tends to cause a problem with respect to preservation stability.
Other Components Sugar groups are also preferable like other solid wetting agents.
Specific examples of the sugar groups include, but are not limited to, monosaccharides, disaccharides, oligosaccharides (including trisaccharides and tetrasaccharides) and polysaccharides.
Specific examples thereof include, but are not limited to, glucose, mannose, fructose, ribose, xylose, arabinose, galactose, maltose, cellobiose, lactose, sucrose, trehalose and maltotriose.
Polysaccharides represent sugar in a broad sense and are materials that are widely present in nature, for example, a-cyclodextrin and cellulose.
In addition, specific examples of derivatives of these sugar groups include, but are not limited to, reducing sugars (for example, sugar alcohols (represented by HOCH2 (CHOH) nCH2OH, where n represents an integer from 2 to 5) of the groups of sugar specified above, oxidized sugars (for example, aldonic acid and uronic acid), amino acid and thioacid.
Among these, sugar alcohols are preferable and specific examples thereof include, but are not limited to, maltitol and sorbit. The processing fluid for use in the present disclosure preferably has at least one type of non-wetting agent compounds, polyol compounds or glycolic ether compounds having 8 to 11 carbon atoms. A penetrating agent with a solubility of 0.2% by weight to 50% by weight in water at 25 ° C is preferable. Among these, 2-ethyl-1,3-hexanediol (solubility: 4.2% at 25 ° C) and 2,2,4-trimethyl-1,3-pentanediol (solubility: 2.0% at 25 ° C) are particularly preferable.
Specific examples of other polyol compounds as a non-wetting agent include, but are not limited to, aliphatic diols such as 2-ethyl-2-methyl-1,3-propanediol, 3,3-dimethyl-1,2-butanediol, 2 , 2-diethyl-1,3-propanediol, 2-methyl-2-propyl-1,3-propanediol, 2,4-dimethyl-2,4-pentanediol, 2,5-dimethyl-2,5-hexanediol and 5 -hexene-1,2-diol.
Any other penetrating agents that can be dissolved in the processing fluid and adjusted to have desired characteristics can be used together.
Specific examples thereof include, but are not limited to, the alkyl and aryl ethers of polyols, such as diethylene glycol monoethyl ether, ethylene glycol monophenyl ether, ethylene glycol monoaryl ether, diethylene glycol monophenyl glycol, diethylene glycol, and methylene glycol, propylene glycol and monoethylene glycol. lower alcohols like ethanol.
The content of the penetrating agent in the processing fluid is preferably 0.1% by weight to 5.0% by weight.
When the content is very small, the ink penetrating effect for inkjet engraving tends to reduce. When the content is very large, the effect of improving penetration by separating the ink from the solvent is easily saturated, since the solubility of the ink in the solvent is low.
The processing fluid for use in the present disclosure may contain antiseptic agents and corrosion control agents for use in the inkjet ink described below.
Inkjet Ink The inkjet ink for use in the present disclosure contains a hydrodispersible coloring agent, serving as a coloring material, a water-soluble organic solvent, a surface active agent, a penetrating agent and water. Hydrodispersible coloring agent
Although pigments are predominantly used as the hydrodispersible coloring agent for inkjet engraving ink considering weather resistance, dyes can also be contained in ink for color adjustment, unless dyes degrade weather resistance. .
There is no specific limitation for pigments. For example, inorganic pigments or organic pigments for black or color are suitable. These can be used alone or together.
Specific examples of inorganic pigments include, but are not limited to, titanium oxide, iron oxide, calcium oxide, barium sulfate, aluminum hydroxide,
barium yellow, cadmium red, chrome yellow and carbon black, manufactured by methods known as contact methods, furnace methods and thermal methods.
Specific examples of organic pigments include, but are not limited to, azo pigments (azo lacquers, insoluble azo pigments, condensed azo pigments, chelated azo pigments, etc.), polycyclic pigments (phthalocyanine pigments, perylene pigments, perinone pigments, anthraquinone pigments, quinacridone pigments, dioxazine pigments, indigo pigments, thioindigo pigments, isoindolinone pigments and quinofuranone pigments, etc.), coloring chelates (basic dye chelates, acid dye chelates), nitropigments, nitrous pigments and black aniline.
Among these pigments, those with good affinity for water are particularly preferable.
More preferred specific examples of black pigments include, but are not limited to, carbon black (Pigment Black CI 7), such as furnace black, lamp black, acetylene black and channel black, metals such as copper and iron (Pigment Black CI 11), metal compounds such as titanium oxide and organic pigments, such as aniline black (Pigmento Preto CI 1).
Specific examples of color pigments include, but are not limited to, Pigment Yellow CI 1, 3, 12, 13, 14, 17, 24, 34, 35, 37, 42 (yellow iron oxide), 53, 55, 74, 81, 83, 95, 97, 98, 100, 101, 104, 108, 109, 110, 117, 120, 128, 138, 150, 151, 153 and 183; Orange Pigment 5, 3, 16, 17, 36, 43 and 51; Pigment Red 1, 2, 3, 5, 17, 22, 23, 31, 38, 31 48: 2, 48: 2 {Permanent red 2B (Ca)}, 48: 3, 48: 4, 49: 1, 52 : 2, 53: 1, 57: 1 (Bright crimson 6B), 60: 1, 63: 1, 63: 2, 64: 1, 81, 83, 88, 101 (red), 104, 105, 106, 108 (Cadmium Red), 112, 114, 122 (Magenta Quinacridone), 123, 146, 149, 166, 168, 170, 172, 177, 178, 179, 185, 190, 193, 209 and 219; Pigment Violet C.I. (Varnish Rhodamine) 1, 3, 5: 1, 16, 19, 23 and 38; Blue pigment C.I. 1, 2, 15, 15: 1, 15: 3 (Phthalocyanine Blue), 16, 17: 1, 56, 60 and 63; Green pigment C.I. 1, 4, 7, 8, 10, 17, 18 and 36.
The following first and second forms are preferable in the case where the coloring agent is a pigment. 1) In the first form, the coloring agent contains a polymer emulsion (water dispersion material of polymer particles containing a coloring material), in which the polymer particles contain the coloring material, with no or little solubility in water. . 2) In the second form, the coloring agent contains a pigment that has at least one type of hydrophobic group on the surface and is hydrodispersible in the absence of a dispersing agent (hereinafter referred to as self-dispersing pigment).
In the present disclosure, in the case of the second form, it preferably contains the hydrodispersible resins specified below.
As the first form of hydrodispersible coloring agent, in addition to the pigment specified above, it is preferable to use a polymeric emulsion in which polymer particles contain the pigment.
The polymeric emulsion in which the polymer particulates contain the pigment means an emulsion in which the pigments are encapsulated in the polymer particulates or adsorbed on the surface of the polymer particulates.
In this case, it is not necessary for all pigments to be encapsulated or adsorbed and some of the pigments can be dispersed in the emulsion, unless they have an adverse impact on the effect of the present disclosure.
Specific examples of the polymers (polymer in the polymer particulates) forming the polymeric emulsions include, but are not limited to, vinyl-based polymers, polymers, polyester-based polymers and polyurethane-based polymers. Among these, vinyl-based polymers and polyester-based polymers are particularly preferably used and the polymers specified in JP-2000-53897-A and JP-2001-139849-A are suitably used.
In addition, in comparison to the pigment particles present alone, the ink containing hydrodispersible materials from the polymer particulates containing the coloring material of the first form is not affected by light scattering, so the ink has excellent color reproducibility. and polymer particulates also serve as a binder, thereby improving the abrasion resistance of image-forming materials.
The volume of the average particle diameter (D50) of the hydrodispersion materials of the polymer particulates containing the coloring material is preferably from 0.01 μm to 0.20 μm in the paint.
The self-dispersing pigment of the second form has a reformed surface, so that at least one hydrophilic group is bonded to the pigment surface directly or via another atom group.
To carry out this surface reform, a particular functional group (functional group such as sulfone group or carboxyl group) is chemically bonded to the pigment surface or the surface is wet-oxidized using at least one hypoal acid or a salt thereof.
Among these, one form is preferable in which a carboxyl group is attached to the pigment surface which is dispersed in water.
Since the pigment has a reformed surface and the carboxyl group is attached to it, the print quality is improved and the water resistance of the water-to-print recording medium is improved, in addition to improving the stability of the dispersion.
In addition, since the ink containing the second form of dispersible pigment has excellent redispersion ability after drying, clogging does not occur even when the moisture from the ink around the nozzles of the inkjet head evaporates while the device printing is suspended for an extended period. Therefore, quality images can be produced again by a simple cleaning operation.
The volume of the average particle diameter (D50) of the self-dispersing pigment is preferably 0.01 μm to 0.20 μm in the paint.
For example, self-dispersing carbon black having an ionic property is preferable, and an anionic charged self-dispersing carbon black is more preferable.
Specific examples of anionic hydrophilic groups include, but are not limited to, -COOM, -SO3M, -PO3HM and -PO3M2 (M represents alkali metals, ammonium or an organic ammonium).
R represents an alkyl group having from 1 to 12 carbon atoms, a substituted or unsubstituted phenyl group or a substituted or unsubstituted naphthyl group. Among these, it is preferable to use pigments in which -COOM or -SO3M are bonded on the surface.
Specific examples of the alkali metal of M in the hydrophilic group include, but are not limited to, lithium, sodium and potassium.
Specific examples of organic ammonium include, but are not limited to, mono, di, or trimethylammonium, mono, di, or triethylammonium and mono, di or trimethanolammonium.
To obtain the anionic charged color pigment, -COONa is introduced on the surface of the color pigment. For example, there are oxidizing methods using sodium hypochlorite, sulfonation methods and methods of using the diazonium salt reaction. The hydrophilic group can be bonded to the carbon black surface by means of another atom group.
Specific examples of such atom groups include, but are not limited to, an alkyl group having 1 to 12 carbon atoms, a substituted or unsubstituted phenyl group or a substituted or unsubstituted naphthyl group.
Specific examples of cases in which the hydrophilic group is bonded to the surface of carbon black 5 by means of another atom group include, but are not limited to, -C2H4COOM (M represents an alkali metal or quaternary ammonium), - PhSCbM ( Ph represents a phenyl group, M represents alkali metal or quaternary ammonium).
The content of the coloring agent in the ink for inkjet engraving is preferably from 2% by weight to 15% by weight in a solid form and, more preferably, from 3% by weight to 12% by weight.
When the content is very small, the color of the ink tends to deteriorate and the image density tends to decrease. When the content is very large, the viscosity of the ink tends to increase, thus degrading the ink discharge performance, which is not preferable.
Water-soluble Organic Solvent As the water-soluble organic solvent for use in inkjet ink 20, water-soluble organic solvents for use in the processing fluid are suitably used.
Water-soluble organic solvents A with a high equilibrium moisture content are particularly suitable.
The mass ratio of the water-soluble coloring agent to the water-soluble organic solvent in the inkjet engraving ink has an impact on the ink discharge stability of the recording head.
If the amount of mixture of the water-soluble organic solvent is small, while the amount of the solid portion of the water-soluble coloring agent is large, the water around the ink meniscus of the nozzles tends to evaporate quickly, thus causing poor discharge performance. The content of the water-soluble organic solvent in the inkjet ink is preferably from 20% by weight to 50% by weight and, more preferably, from 20% by weight to 45% by weight.
When the content is very small, the discharge stability tends to deteriorate and residual ink attaches easily to the maintenance unit of the inkjet engraving device.
In addition, when the content is very large, the drying property of the ink in the recording medium (typically paper) tends to be lower and the quality of the text on plain paper may deteriorate.
Surface Active Agent As the surface active agent for use in ink for inkjet engraving, it is preferable to use a surface active agent that has a low surface tension, a high penetration property and an excellent leveling property without degrading the dispersion stability, regardless of the type of coloring agent and the combined use with the water-soluble organic solvent.
At least one surface active agent selected from the group consisting of anionic surface active agents, non-ionic surface active agents, silicon-containing surface active agents and fluorine-containing surface active agents are preferable.
Among these, silicon-containing surface agents and fluorine-containing surface agents are particularly preferred.
These surface active agents can be used alone or in combination.
As the surface active agent for use in ink for inkjet engraving, surface active agents for use in the processing fluid are suitably used.
The content of the surface active agents in the ink for engraving and inkjet is preferably from 0.01% by weight to 3.0% by weight and, more preferably, from 0.5% by weight to 2% by weight. Weight.
When the content is very small, the effect of the surface active agent tends to be weak. When the content is very large, the penetration of the ink into a recording medium tends to be excessive, resulting in a decrease in the density of the image and the occurrence of scratches.
Penetrating Agent As the penetrating agent for use in ink for inkjet engraving, the penetrating agent for use in the processing fluid is suitably used. The content of the ink penetrating agent for inkjet engraving is preferably from 0.1% by weight to 4.0% by weight.
When the content is very small, the image obtained may not dry out quickly, resulting in a blurred image. When the content is very large, the stability of the dispersion of the coloring agent may deteriorate, the nozzles tend to clog and the penetration of the ink in the recording medium tends to become excessive, which leads to a decrease in the density of the image and occurrence of risks.
Hydrodispersible Resin Hydrodispersible resins have excellent film forming properties (image formation), water repellency, water resistance and weather resistance. Therefore, these are suitable for image recording that requires high water resistance and high image density.
Specific examples thereof include, but are not limited to, condensation based resins, addition based resins and natural polymers.
Specific examples of condensation-based synthetic resins include, but are not limited to, polyester resins, polyurethane resins, polyepox resins, polyamide resins, polyether resins, poly (meth) acrylic resins, silicone-acrylic resins and fluorine-containing resins.
Specific examples of addition-based resins include, but are not limited to, polyolefin resins, polystyrene resins, polyvinyl alcohol resins, polyvinyl ester resins, polyacrylic acid resins and unsaturated carboxylic acid resins.
Specific examples of natural resins include, but are not limited to, cellulose, rosins and natural rubber.
Among these, polyurethane resin particles, acrylic-silicone resin particles and fluorine-containing resin particles are preferable. These can be used alone or together.
Like fluorine-containing resin particles, fluorine-containing resin particles with fluorolefin units are preferable. Among these, fluorine-containing vinyl ether resin particulates formed of 5 fluorolefin units and vinyl ether units are particularly preferable.
There is no specific limitation for fluorolefin units. Examples of these include, but are not limited to, -CF2CF2-, -CF2CF (CF3) - and -CF2CFC1-. 10 There is no specific limitation for vinyl ether units. For example, compounds represented by the following Chemical Structures are suitable.

As the fluorine-containing vinyl ether resin particulates of the fluorolefin units and the vinyl ether units, alternate copolymers in which the fluorolefin units and the vinyl ether units are alternately copolymerized.
Any properly synthesized fluorine-containing resin particles and their products available on the market can be used.
Specific examples of products available on the market include, but are not limited to, FLUONATE FEM-500, FEM-600, DICGUARD F-52S, F-90, F-90M, F-90N and AQUA FURAN TE-5A (all produced by DIG COPORATION); and LUMIFLON FE4300, FE4500 and FE4400, ASAHI GUARD AG-7105, AG-950, AG-7600, AG-7000 and AG-1100 (all produced by ASAHI GLASS CO., LTD.) ..
Hydrodispersible resins can be used as homopolymers or complex resins as copolymers. Any of the single phase structure type emulsions, core-shell type and powder feed type are suitable.
A hydrodispersible resin that has a self-dispersing hydrophilic group or no dispersibility, while dispersibility is given to a surface active agent or a resin with hydrophilic group can be used as the hydrodispersible resin.
Among these, emulsions of the resin particles obtained by emulsification polymerization or suspension polymerization of the unsaturated ionomers or monomers of a polyester resin or polyurethane resin are more suitable.
In the case of polymerization by emulsification of an unsaturated monomer, since a resin emulsion is obtained by the reaction in water which an unsaturated monomer, a polymerization initiator, an active surface agent, a chain transfer agent, a chelating agent, pH adjusting agent, etc. are added, it is easy to obtain a hydrodispersible resin and change the components of the resin. Therefore, a hydrodispersible resin with target properties is easily obtained.
Specific examples of unsaturated monomers include, but are not limited to, unsaturated carboxylic acids, monofunctional or polyfunctional monomers, (meth) acrylic ester monomers, (meth) acrylic amide monomers, aromatic vinyl monomers, cyan vinyl compound monomers vinyl, arylated monomers, olefin monomers, diene monomers and unsaturated carbon oligomers. These can be used alone or together.
When these monomers are used together, the properties of the resin can be easily improved. The properties of the resin can be improved by polymerization reaction and graft reaction using an oligomer type polymerization initiators.
Specific examples of unsaturated carboxylic acids include, but are not limited to, acrylic acid, methacrylic acid, itaconic acid, fumaric acid and maleic acid.
Specific examples of monofunctional (meth) acrylic ester monomers include, but are not limited to, methyl methacrylate, ethyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, n-amyl methacrylate, n-amyl methacrylate , n-hexyl methacrylate, 2-ethylhexyl methacrylate, octyl methacrylate, decyl methacrylate, dodecyl methacrylate, octadecyl methacrylate, cyclohexyl methacrylate, benzyl methacrylate methacrylate, benzyl methacrylate 2, , 2-hydroxypropyl methacrylate, dimethylaminoethyl methacrylate, methacryloxyethyltrimethyl ammonium salts, 3-methacryloxypropyltrimethoxysilane, methyl acrylate, ethyl acrylate, isopropyl acrylate, n-butyl acrylate acrylate, acrylate, acrylate, acrylate, acrylate, acrylate isoamyl, n-hexyl acrylate, 2-ethylhexyl acrylate, octyl acrylate, decyl acrylate, dodecyl acrylate, octadecyl acrylate, acr cyclohexyl ilate, phenyl acrylate, benzyl acrylate, glycidyl acrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, dimethylaminoethyl acrylate and acryloxyethyltrimethylammonium salts.
Specific examples of polyfunctional (meth) acrylic ester monomers include, but are not limited to, ethylene glycol dimethacrylate, ethylene glycol dimethacrylate, polyethylene glycol dimethacrylate, 1,3-butyl dimethyl glycol dimethacrylate, 1,4-butyl dimethyl acrylate , 1,6-hexanediol dimethacrylate, neopentyl glycol dimethacrylate, dipropylene glycol dimethacrylate, polypropylene glycol dimethacrylate, polybutylene glycol dimethacrylate, 2,2'-bis (methacrylethylmethyl) methacryloxymethylcretane triethylene glycol, 1,3-butylene glycol diacrylate, 1,4-butylene glycol diacrylate, 1,6-hexanediol diacrylate, neopentyl glycol diacrylate, 1, 9-nonanediol diarylate, polypropylene glycol diacrylate, 2,2'- bis (4 -acryloxypropyloxyphenyl) propane, 2,2'-bis (4-acryloxydiethoxyphenyl) propanetrimethylolpropane triacrylide, trimethylol triacrylate ethane, tetramethylolmethane triacrylate, ditrimethylol tetracrylate, tetramethylolmethane tetracrylate, pentaerythritol tetracrylate and pentaerythritol hexacrylate.
Specific examples of (meth) acrylic amide monomers include, but are not limited to, acrylic amides, methacrylic amides, N, N-dimethylacrylic amides, methylenebisacrylic amides and 2-acrylic amide 2-methylpropanesulfonates.
Specific examples of vinyl aromatic monomers include, but are not limited to, styrene, OI-methylstyrene, vinyltoluene, styrene 4-t-butylstyrene, chloro-styrene, vinylanisol, vinylnaphthalene and divinylbenzene.
Specific examples of vinylomeric monomers include, but are not limited to, acrylonitrile and methacrylonitrile.
Specific examples of vinyl monomers include, but are not limited to, vinyl acetate, vinylidene chloride, vinyl chloride, vinyl ether, vinyl ketone, vinyl pyrrolidone, vinyl sulfonic acid and its salts, vinyl trimethoxysilane and vinyl triethoxysilane.
Specific examples of the monomers of the arylated compound include, but are not limited to, arylsulfonic acid and its salts, arylamine, aryl chloride, diarylamine and diaryldimethylammonium salts.
Specific examples of the olefin monomers include, but are not limited to, ethylene and propylene.
Specific examples of diene monomers include, but are not limited to, butadiene and chloroprene.
Specific examples of the unsaturated carbon oligomers include, but are not limited to, styrene oligomers having a methacryloyl group, styreneacrylonitrile oligomers with a methacryloyl group, methylmethacrylate oligomers, a polyethyl oligomer with a polyethyl group of dimethyls with an acryloyl group.
Since breakage in chains of molecules, such as dispersion destruction and hydrolytic cleavage, occurs for hydrodispersible resins in a strong alkaline or strong acid environment, the pH is preferably 4 to 12, more preferably 6 to 11, and even more preferably from 7 to 9 in terms of miscibility with the hydrodispersible coloring agent.
The average particle diameter (D50) of the hydrodispersible resin is related to the viscosity of the liquid dispersion. If the compositions are the same, the viscosity of the same solid portion increases as the particle diameter decreases.
To avoid preparing the paint with an excessively high viscosity, the average particle diameter (D50) of the hydrodispersible resin is preferably 50 nm or more.
In addition, particles with particle diameters larger, for example, several tens of μm, than the nozzle size of the inkjet head are not usable.
When large particles smaller than the nozzle mouth are present in the ink, the discharge property of the ink deteriorates.
The average particle diameter (D50) of the hydrodispersible resin in the paint is preferably 200 nm or less and, more preferably, 150 nm or less so as not to degrade the paint discharge property.
In addition, the hydrodispersible resin preferably has a fixing characteristic of the hydrodispersible coloring agent in a recording medium (typically paper) and forms a film at room temperature to improve the fixing property of the coloring material.
Therefore, the minimum film-forming temperature (MFT) of the hydrodispersible resin is preferably 30 ° C or less.
In addition, when the glass transition temperature of the hydrodispersible resin is very low (for example, -40 ° C or less), the viscosity of the resin film tends to increase, thereby causing the obtained image sheet to increase adhesion. .
Therefore, the glass transition temperature of the hydrodispersible resin is preferably -30 ° C or higher.
The content of hydrodispersible resin in the ink for inkjet engraving is preferably from 1% by weight to 15% by weight and, more preferably, from 2% by weight to 7% in a solid form.
The content of the solid portion in the ink for inkjet engraving can be measured, for example, by a method of separating only the hydrodispersible coloring agent and the hydrodispersible resin from the ink for the inkjet engraving.
When the pigment is used as the hydrodispersible coloring agent, the ratio of the coloring agent to the hydrodispersible resin can be measured by evaluating the decreasing mass ratio by thermal mass analysis.
In addition, when the structure of the hydrodispersible dye molecule is known, it is possible to quantify the solid portion of the coloring agent using NMR for pigments or dyes and X-ray fluorescence analysis for heavy metal atoms and inorganic pigments, organic pigments containing metal contained in the structure of the molecule and dyes containing metal.
Other Components There are no specific limitations on the selection of other components. Optionally, pH adjusting agents, antiseptic and antifungal agents, chelate reagents, anti-corrosion agents, antioxidants, ultraviolet absorbers, oxygen absorbers and photo-stabilizing agents can be mixed in the paint of the present disclosure.
Any pH adjusters that can adjust the pH of the ink prescribed for inkjet engraving to be from 7 to 11 without having an adverse impact on the ink can be used. Specific examples thereof include, but are not limited to, alcohol amines, hydroxides of alkali metal elements, ammonium hydroxides, phosphonium hydroxides and alkali metal carbonates.
When the pH is too high or too low, the pH adjuster tends to dissolve a large amount of the inkjet head and an ink supply unit, which results in modification, leakage, poor ink discharge performance, etc. .
Specific examples of alcohol amines include, but are not limited to, diethanolamine, triethanolamine and 2-amino-2-ethyl-1,3-propanediol.
Specific examples of alkali metal hydroxides include, but are not limited to, lithium hydroxide, sodium hydroxide and potassium hydroxide.
Specific examples of ammonium hydroxides include, but are not limited to, ammonium hydroxide, quaternary ammonium hydroxide and quaternary phosphonium hydroxide.
Specific examples of alkali metal carbonates include, but are not limited to, lithium carbonate, sodium carbonate and potassium carbonate.
Specific examples of antiseptic and antifungal agents include, but are not limited to, dehydrosodium acetate, sodium sorbinate, sodium 2-pyridine thiol-1-oxide, sodium benzoate and sodium pentachlorophenol.
Specific examples of chelated reagents include, but are not limited to, sodium ethylenediamine tetracetate, sodium ethylenediamine tetracetate, sodium nitrile triacetate, sodium hydroxyethylethylenediamine triacetate, sodium hydroxyethyl diethylene triamine acetate and diacylamine.
Specific examples of anti-corrosion agents include, but are not limited to, acid sulfite, thiosodium sulfate, ammonium thiodiglycolate, diisopropylammonium nitride, quaternary pentaerythritol nitride and dicyclohexylammonium nitride.
Specific examples of antioxidants include, but are not limited to, phenol-based antioxidants (including hindered phenol-based antioxidants), amino-based antioxidants, sulfur-based antioxidants and phosphorus-based antioxidants.
Specific examples of ultraviolet absorbers include, but are not limited to, benzophenone based ultraviolet absorbers, benzotriazole based ultraviolet absorbers, salicylate based ultraviolet absorbers, cyanoacrylate based ultraviolet absorbers and ultraviolet absorbers based on nickel complex salt.
Ink Manufacturing Method for Inkjet Engraving
The inkjet engraving ink for use in the present disclosure is manufactured by dispersing or dissolving the hydrodispersible coloring agent, the water-soluble organic solvent, the surface active agent, the penetrating agent and water with optional components in aqueous medium, 20 followed by stirring and mixing, if desired.
The dispersion and mixing are carried out by a sand mill, a homogenizer, a ball mill, a paint stirrer, an ultrasonic dispersing agent, etc. Stirring and mixing can be carried out by a stirrer having a typical stirring wing, a magnetic stirrer, a high speed dispersion device, etc. .
Features of Inkjet Engraving Ink
There is no specific limitation on the characteristics of inkjet engraving ink for use in the present disclosure. For example, viscosity, surface tension, etc., are preferably in the following ranges.
The ink viscosity for inkjet engraving is preferably from 5 mPa-S to 20 mPa * S at 25 ° C.
When the ink viscosity is 5 mPa ^ S or greater, the print density and text quality are improved. When the ink viscosity is 20 mPa • S or less, a suitable ink discharge property is guaranteed.
Viscosity can be measured by a viscometer (RE-550 L, manufactured by TOKI SANGYO CO., LTD.) At 25 ° C.
The static surface tension of ink for inkjet engraving is preferably from 20 mN / m to 35 mN / m, and more preferably from 20 mN / m to 30 mN / m at 25 ° C.
When the static surface tension of ink for inkjet engraving is within the range of 20 mN / m to 35 mN / m, the penetration property is improved, thereby reducing bleeding so that the drying property for plain paper becomes if good.
Since the ink tends to leak into the process layer, the coloring is good and white spots are reduced.
When the surface tension is very strong, the leveling of the ink in a recording medium tends to occur with difficulty, thus prolonging the drying time.
There is no specific limitation on the colors of the inkjet engraving ink for use in the present disclosure. For example, yellow, magenta, cyan and black are suitable.
When a set of inks having at least two types of colors is used for engraving, several color images can be formed. When a set of inks having all color combinations is used for engraving, full color images can be formed.
The inkjet engraving ink for use in the present disclosure is used in any printer with an inkjet head, as a type of piezoelectric element in which ink droplets are discharged, by transforming a vibrating plate forming the wall. the ink flow path using a piezoelectric element as a pressure generating device to compress the ink in the ink flow path as described in JP-H2-51734-A; a thermal type, in which bubbles are produced by heating the ink in the ink flow path with a thermal element as described in JP-S61-59911-A; and an electrostatic type in which ink droplets are discharged by changes in volume in the ink flow path caused by the transformation of a vibrational plate that forms the wall surface of the ink flow path by an electrostatic force generated between the vibrational plate and the electrode while the vibrational plate and the electrode are placed facing each other, as described in JP-H6-71882-A.
The inkjet engraving ink for use in the present disclosure can be used on a printer with an accelerated fixation feature of printed images by heating an ink recording medium from 50 ° C to 200 ° C during, before or after printing.
Recording Medium As the recording medium, plain paper without a coated layer is properly used. In general, plain paper with a test size of 10 seconds or more and an air permeability of 5S to 50S used as a typical photocopy paper is preferable.
Inkjet Engraving Method The inkjet engraving method of the present disclosure has a processing step of applying the processing fluid for use in the present disclosure to a recording medium and an ink flotation process (ink flying ( discharge)) to float ink for inkjet recording for use in the present disclosure for the recording medium by applying ink stimuli for inkjet recording to form images in the recording medium, to which the processing fluid its applied.
Ink Flying Process (Discharge) The ink flying process in the image formation method (inkjet engraving method) is a process of applying a stimulus (energy) to the ink for inkjet engraving to make the ink float (discharge) over the recording medium on which the processing fluid is coated to form an image on the recording medium.
As the method of imaging on a recording medium by floating the ink for inkjet recording on the recording medium in the ink flying process, any known inkjet recording method can be used.
Specific examples of such methods include, but are not limited to, a one-head scan inkjet recording method and an inkjet recording method using aligned heads to record images on a recording medium.
In the ink flotation process, there is no specific limitation for the system for driving a recording head that serves as the ink flotation device. For example, a piezoelectric element driver using PZT, etc., a thermal energy system, an on-demand recording head using a driver, etc. using an electrostatic force, and a charge control type recording head using a continuous spray system can be used to record images.
In the system using thermal energy, arbitrarily controlling spray droplets (discharge) is difficult, so images tend to vary depending on the type of recording medium. This problem can be solved by supplying the processing fluid to the recording medium, resulting in stable image quality regardless of the types of recording medium.
Inkjet Engraving Device There are other inkjet engraving devices, as shown in Figures 14 to 17.
In the inkjet recording device V shown in Figure 14, the recording medium 10 is sent from the sheet feeder 5 by the sheet feeder roller 11; the processing fluid is applied uniformly to the surface of the recording medium 10 on which an image is formed secondarily by the application roller 40 and the counter roller 41 in the first processing fluid applicator 2; and after the recording medium 10 passes through the transfer route 30, the processing fluid is uniformly applied to the surface of the recording medium 10 on which an image is first formed by the application roller 40 and the counter roller 41 in the second applicator of processing fluid 3.
The time between when the treatment fluid was applied to the first processing fluid applicator 2 and when the processing fluid is applied to the second processing fluid applicator 3 is controlled by the transfer speed of the recording medium 10.
The recording medium 10 to which the processing fluid is applied is transferred to the inkjet recording unit 1 and after an ink image is formed on the recording medium 10, the recording medium 10 is discharged to the discharge unit by the discharge roller.
The first processing fluid applicator first and the second processing fluid applicator are detachably attached and replaceable.
The inkjet recording device VI illustrated in Figure 15 is different from the inkjet recording device V, in that the surface to which the processing fluid is first applied is equal to the surface on which the image of ink is first formed and the surface on which the processing fluid is applied a second time is equal to the surface on which the ink image is formed a second time.
The inkjet recording device VI illustrated in Figure 16 is different from the inkjet recording device V, in that the processing fluid is applied only on the surface opposite to the surface on which an ink image is formed.
The inkjet recording device VIII of Figure 17 is different from the inkjet recording device V in that the processing fluid is applied only to the surface on which an ink image is formed.
Having generally described the preferred embodiments of this invention, further understanding can be obtained by reference to certain specific examples which are provided in this document for purposes of illustration only and are not intended to be limiting. In the descriptions in the examples below, the numbers represent the weight ratios in parts, unless otherwise specified. EXAMPLES
In the following, the present disclosure is described in detail with reference to the Examples, but not limited to them.
Preparation of Process Liquid Preparation Example 1: Preparation of Process Liquid 1 The process liquid is prepared as follows. As shown in Tables 1-1 to 1-4, 10 parts lactic acid materials (solid portion) serving as the water-soluble agglomeration agent, 5 parts glycerin which serve as the water-soluble organic solvent A, 10 parts β -butoxy-N, N-dimethylpropionamide which serves as the water-soluble organic solvent B, 15 parts of 3-methyl-1,3-hexanediol serving as the water-soluble organic solvent B, 0.5 parts of ZONYL FS300 serving as surface active agent 0.05 part of PROXEL GXL serving as an anti-mold agent is stirred, and deionized water is added to complete the total parts as being 100 parts over an hour to obtain a uniform mixture.
The processing fluid thus obtained is filtered with a polyvinylidene fluoride membrane filter with an average bore diameter of 5.0 μm under pressure to remove coarse particles and dust to prepare Process Liquid 1. Table 1-1






The specifications for the compounds in Tables 1-1 and 1-2 are as follows: Lactic acid: purity: 85% or more, manufactured by TOKYO CHEMICAL INDUSTRY CO., Ltd. 5 Ammonium lactate: purity: 66% or more, manufactured by MUSASHINO CHEMICAL LABORATORY, LTD. Calcium lactate: DL calcium lactate pentahydrate (purity: 95% or more, manufactured by WAKO PURE CHEMICAL INDUSTRIES, LTD.). 10 POLYFIX 301: polymer of cations (polymer based on epichlorohydrin, polyamide): molecular weight: 3,000, effective component: 30%, manufactured by SHOWA HIGHPOLYMER CO., Ltd. ARAFIX 255 LOX: polymer of cations (polymer based on epichlorohydrin ), effective component: 25% 15 DK-6830: cation polymer (polyamide, epichlorohydrin-based polymer): effective component: 55% ZONYL FS-300: Polyoxyethylene perfluoralkyl ether (effective component 40% by weight, manufactured by Du Pont Kabushiki Kaisha) SOFTANOL EP-7025: polyoxyalkylenealkyl ether (component 100% by weight, manufactured by NIPPON SHOKUBAI CO., Ltd.) PROXEL GXL: anti-mold agent, mainly composed of 1,2-benzoisothiazolin-3-one (component: 20% by weight, containing dipropylene glycol, manufactured by Avecia) Preparation Example 2: Preparation of Process Liquid 2 Shake the materials shown in Tables 1-1 to 1-4 for one hour in the same manner as in Preparation Example 1 to obtain a mixture uniform. Filter the processing fluid thus obtained with a polyvinylidene fluoride membrane filter with an average bore diameter of 5.0 μm under pressure to remove coarse particles and dust to prepare Process Liquid 2. Preparation Example 3: Preparation Process Liquid 3 Shake the materials shown in Tables 1-1 to 1-4 for one hour in the same manner as in Preparation Example 1 to obtain a uniform mixture. Filter the processing fluid thus obtained with a polyvinylidene fluoride membrane filter with an average bore diameter of 5.0 μm under pressure to remove coarse particles and dust to prepare Process Liquid 3. Preparation Example 4: Preparation Process Liquid 4 Shake the materials shown in Tables 1-1 to 1-4 for one hour in the same manner as in Preparation Example 1 to obtain a uniform mixture. Filter the processing fluid thus obtained with a polyvinylidene fluoride membrane filter with an average bore diameter of 5.0 μm under pressure to remove coarse particles and dust to prepare Process Liquid 4. Preparation Example 5: Preparation of Process Liquid 5 Shake the materials shown in Tables 1-1 to 1-4 for one hour in the same manner as in Preparation Example 1 to obtain a uniform mixture. Filter the processing fluid thus obtained with a polyvinylidene fluoride membrane filter with an average bore diameter of 5.0 μm under pressure to remove coarse particles and dust to prepare Process Liquid 5. Preparation Example 6: Preparation Process Liquid 6 Shake the materials shown in Tables 1-1 to 1-4 for one hour in the same manner as in Preparation Example 1 to obtain a uniform mixture. Filter the processing fluid thus obtained with a polyvinylidene fluoride membrane filter with an average bore diameter of 5.0 μm under pressure to remove coarse particles and dust to prepare Process Liquid 6. Preparation Example 7: Preparation Process Liquid 7 Stir the materials shown in Tables 1-1 to 1-4 for one hour in the same manner as in Preparation Example 1 to obtain a uniform mixture. Filter the processing fluid thus obtained with a polyvinylidene fluoride membrane filter with an average bore diameter of 5.0 μm under pressure to remove coarse particles and dust to prepare Process Liquid 7. Preparation Example 8: Preparation of the Stirring Liquid shown in Tables 1-1 to 1-4 for one hour in the same manner as in Preparation Example 1 to obtain a uniform mixture. Filter the processing fluid thus obtained with a polyvinylidene fluoride membrane filter with an average bore diameter of 5.0 μm under pressure to remove coarse particles and dust to prepare Process Liquid 8. Preparation Example 9: Preparation Process Liquid 9 Stir the materials shown in Tables 1-1 to 1-4 for one hour in the same manner as in Preparation Example 1 to obtain a uniform mixture. Filter the processing fluid thus obtained with a polyvinylidene fluoride membrane filter with an average bore diameter of 5.0 μm under pressure to remove coarse particles and dust to prepare Process Liquid 9. Preparation Example 10: Preparation Process Liquid 10 Stir the materials shown in Tables 1-1 to 1-4 for one hour in the same manner as in Preparation Example 1 to obtain a uniform mixture. The processing fluid thus obtained is filtered with a polyvinylidene fluoride membrane filter with an average bore diameter of 5.0 μm under pressure to remove coarse particles and dust to prepare Process Liquid 10. Preparation Example 11: Preparation of Process Liquid 11 Shake the materials shown in Tables 1-1 to 1-4 for one hour in the same manner as in Preparation Example 1 to obtain a uniform mixture. The processing fluid thus obtained is filtered with a polyvinylidene fluoride membrane filter with an average bore diameter of 5.0 μm under pressure to remove coarse particles and dust to prepare Process Liquid 11. Preparation Example 12: Preparation of Process Liquid 12 Shake the materials shown in Tables 1-1 to 1-4 for one hour in the same manner as in Preparation Example 1 to obtain a uniform mixture. Filter the processing fluid thus obtained with a polyvinylidene fluoride membrane filter with an average bore diameter of 5.0 μm under pressure to remove coarse particles and dust to prepare Process Liquid 12. Preparation Example 13: Preparation Process Liquid 13 Shake the materials shown in Tables 1-1 to 1-4 for one hour in the same manner as in Preparation Example 1 to obtain a uniform mixture. Filter the processing fluid thus obtained with a polyvinylidene fluoride membrane filter with an average bore diameter of 5.0 μm under pressure to remove coarse particles and dust to prepare Process Liquid 13. Preparation Example 14: Preparation Process Liquid 14 Stir the materials shown in Tables 1-1 to 1-4 for one hour in the same manner as in Preparation Example 1 to obtain a uniform mixture. Filter the processing fluid thus obtained with a polyvinylidene fluoride membrane filter with an average bore diameter of 5.0 μm under pressure to remove coarse particles and dust to prepare Process Liquid 14. Preparation Example 15: Preparation of the Stirring Liquid shown in Tables 1-1 to 1-4 for one hour in the same manner as in Preparation Example 1 to obtain a uniform mixture. Filter the processing fluid thus obtained with a polyvinylidene fluoride membrane filter with an average bore diameter of 5.0 μm under pressure to remove coarse particles and dust to prepare Process Liquid 15. Preparation Example 16: Preparation of Process Liquid 16 Shake the materials shown in Tables 1-1 to 1-4 for one hour in the same manner as in Preparation Example 1 to obtain a uniform mixture. Filter the process fluid thus obtained with a polyvinylidene fluoride membrane filter with an average bore diameter of 5.0 μm under pressure to remove coarse particles and dust to prepare Process Liquid 16. Preparation Example 17: Preparation Process Liquid 17 Stir the materials shown in Tables 1-1 to 1-4 for one hour in the same manner as in Preparation Example 1 to obtain a uniform mixture. Filter the processing fluid thus obtained with a polyvinylidene fluoride membrane filter with an average bore diameter of 5.0 μm under pressure to remove coarse particles and dust to prepare Process Liquid 17. Preparation Example 18: Preparation of Process Liquid 18 Shake the materials shown in Tables 1-1 to 1-4 for one hour in the same manner as in Preparation Example 1 to obtain a uniform mixture. Filter the processing fluid thus obtained with a polyvinylidene fluoride membrane filter with an average bore diameter of 5.0 μm under pressure to remove coarse particles and dust to prepare Process Liquid 18. Preparation Example 19: Preparation Process Liquid 19 Stir the materials shown in Tables 1-1 to 1-4 for one hour in the same manner as in Preparation Example 1 to obtain a uniform mixture. Filter the process fluid thus obtained with a polyvinylidene fluoride membrane filter with an average bore diameter of 5.0 μm under pressure to remove coarse particles and dust to prepare Process Liquid 19. Preparation Example 20: Preparation Process Liquid 20 Shake the materials shown in Tables 1-1 to 1-4 for one hour in the same manner as in Preparation Example 1 to obtain a uniform mixture. Filter the processing fluid thus obtained with a polyvinylidene fluoride membrane filter with an average bore diameter of 5.0 μm under pressure to remove coarse particles and dust to prepare Process Liquid 20. Preparation of Ink for Etching Inkjet Preparation of Pigments Containing Liquid Dispersion of Polymer Particulate Preparation Example 21: Preparation of Polymer Solution A After sufficient replacement with nitrogen gas in a flask equipped with a mechanical stirrer, a thermometer, a nitrogen gas introduction tube, a reflux tube and a drip funnel, mix 11.2 g of styrene, 2.8 g of acrylic acid, 12.0 g of lauryl methacrylate, 4.0 g of polyethylene glycol methacrylate, 4.0 g of styrene and 0.4 g of mercaptoethanol in the flask and heat the system to 65 ° C; and then drip a liquid mixture of 100.8 g of styrene, 25.2 g of acrylic acid, 108.0 g of lauryl methacrylate, 36.0 g of polyethylene glycol methacrylate, 60.0 g of hydroxyethyl methacrylate, 36.0 g of styrene macromer, 3.6 g of mercaptoethanol, 2.4 g of azobisdimethylvaleronitrile and 18 g of methyl ethyl ketone in the flask in two and a half hours. Subsequently, drip a liquid mixture of 0.8 g of azobismethylvaleronitrile and 18 g of methyl ethyl ketone into the flask in half an hour. After aging for one hour at 65 ° C, add 0.8 g of azobismethylvaleronitrile followed by another hour of aging. After the reaction is complete, add 364 g of methyl ethyl ketone to the flask to obtain 800 g of polymer A solution with a concentration of 50% by weight. Preparation Example 22: Preparation of Magenta Pigment Containing Liquid Dispersion of Polymer Particulate Stir sufficiently 28 g of polymer A solution, 4.2 g of the magenta-colored material shown in Table 2, 13.6 g of potassium hydroxide solution 1 mol / L, 20 g of methyl ethyl ketone and 13.6 g of deionized water; Mix and knead the mixture using a roller mill; Place the obtained paste in 200 g of deionized water, followed by sufficient stirring. Distill methyl ethyl ketone and water using an evaporator and remove coarse particles by filtration of the liquid dispersion thus obtained with a polyvinylidene fluoride membrane filter with an average bore diameter of 5.0 μm under pressure to obtain a liquid dispersion of polymer particulate containing pigment with a pigment in an amount of 15% by weight with a solid portion of 20% by weight. The average particle diameter (D50) of the polymer particulates in the liquid pigment dispersion containing polymer particulates is measured and is shown in Table 2. 10 The average particle diameter (D50) is measured by the size distribution measuring instrument. particulate (NANOTRAC UPA-EX-150, manufactured by NIKKISO CO., Ltd.). Table 2

Preparation example 23: Preparation of liquid dispersion of polymer particulate containing cyan pigment
A liquid dispersion of polymer particulate containing cyan pigment is prepared in the same manner as in
Preparation Example 22, except that the coloring materials in Preparation Example 22 are replaced with the coloring materials shown in Table 2. Preparation Example 24: Preparation of liquid dispersion of polymer particulate containing yellow pigment
A liquid dispersion of polymer particulate containing yellow pigment is prepared in the same manner as in Preparation Example 22, except that the coloring materials in Preparation Example 22 are replaced with the coloring materials shown in Table 2. Preparation example 25: Preparation of liquid dispersion of polymer particulate containing black pigment
A liquid dispersion of polymer particulate containing black pigment is prepared in the same manner as in Preparation Example 22, except that the coloring materials in Preparation Example 22 are replaced with the coloring materials shown in Table 2.
Preparation of Ink for Inkjet Engraving Preparation Example 25: Preparation of Ink 1 for Inkjet Engraving Prepare Ink 1 for inkjet engraving as follows: Mix a water-soluble organic solvent (wetting agent), an agent of penetration, a surface active agent and an anti-mold and water agent shown in Table 3, followed by stirring for one hour to mix evenly. In addition, depending on the liquid mixture, add a hydrodispersible resin to the liquid mixture, followed by stirring for one hour and then adding a liquid dispersion of the pigment, a defoaming agent and a pH adjuster to the resultant followed by stirring for one hour . Filter the liquid dispersion thus obtained with a polyvinylidene fluoride membrane filter with an average bore diameter of 5.0 μm under pressure to remove coarse particles and dust to prepare the magenta ink for the 5 inkjet etching of the Ink 1. Table 3-1



The specifications for the compounds in Tables 3-1 and 3-2 are as follows: The liquid dispersion of polymer particulate containing magenta pigment is shown in Table 2 The liquid dispersion of polymer particulate containing cyan pigment is shown in Table 2 The dispersion The liquid dispersion of polymer particulate containing yellow pigment is shown in Table 2 The liquid dispersion of polymer particulate containing black pigment is shown in Table 2 CAB-O-JET 260: solid portion of the pigment: 11%, magenta self-dispersing pigment, diameter medium particle (D50): 125 nm, manufactured by CABOT CORPORATION CAB-O-JET 250: solid portion of the pigment: 11%, cyan self-dispersing pigment, average particle diameter (D50): 110 nm, manufactured by CABOT CORPORATION CAB- O-JET 270: solid portion of the pigment: 11%, yellow self-dispersing pigment, average particle diameter (D50): 170 nm, manufactured by CABOT CORPORATION CAB-O-JET 300: solid portion of the pigment: 11%, pigment of self-dispersion p straight, average particle diameter (D50): 130 nm, manufactured by CABOT CORPORATION
Fluoride-containing emulsion: LUMIFLON FE4500, solid portion: 52% by weight, average particle diameter: 136 nm, minimum film formation temperature (MFT): 28 ° C, manufactured by ASAHI GLASS CO., Ltd.) (Emulsion of acrylic silicone resin: Polyzole ROY6312, solid portion: 40% by weight, average particle diameter: 171 nm, minimum film formation temperature (MET): 20 ° C, manufactured by SHOWA HIGHPOLYMER CO., Ltd.) KF- 642: Modified silicone and polyether compound (100% by weight component, manufactured by Shin-Etsu Chemical Co., Ltd.) SOFTANOL EP-7025: polyoxyalkylenealkyl ether (100% by weight component, manufactured by NIPPON SHOKUBAI CO., Ltd. ) Proxel GXL: Anti-mold agent, mainly composed of 1,2-benzoisothiazolin-3-one (component: 20% by weight, containing dipropylene glycol, manufactured by Avecia) KM-72F, self-emulsifying silicone antifoaming agent (component: 100% in weight, manufactured by Shin-Etsu Silicone Co., Ltd.) Preparation Example 27: Preparation of Tin port 2 for Inkjet Engraving Ink 2 for inkjet engraving is prepared in the same manner as in Preparation Example 26, except that the composition of ink material in ink 1 for inkjet engraving is replaced with the composition material for Preparation Example 28: Preparation of Ink 3 for Inkjet Engraving Ink 3 for inkjet engraving is prepared in the same manner as in Preparation Example 26 except that the composition of ink material in ink 1 for inkjet engraving is replaced with the ink material composition shown in Table 3. Preparation Example 29: Preparation of Ink 4 for Inkjet Engraving Ink 4 for inkjet engraving is prepared in the same way as in Preparation Example 26 except that the ink material composition in ink jet engraving ink 1 is replaced with the ink material composition shown in Table 3. Preparation Example 30: Preparation of T Item 5 for Inkjet Engraving Ink 5 for inkjet engraving is prepared in the same manner as in Preparation Example 26 except that the composition of ink material in ink 1 for inkjet engraving is replaced with the composition of ink material shown in Table 3. Preparation Example 31: Preparation of Ink 6 for Inkjet Engraving Ink 6 for inkjet engraving is prepared in the same manner as in Preparation Example 26 except that the material composition of ink in ink 1 for inkjet engraving is replaced with the ink material composition shown in Table 3. Preparation Example 32: Preparation of Ink 7 for Inkjet Engraving Ink 7 for inkjet engraving is prepared in the same manner as in Preparation Example 26 except that the ink material composition in ink jet ink 1 is replaced with the ink material composition shown in Table 3. Example of P repair 33: Preparation of Ink 8 for Inkjet Engraving Ink 8 for inkjet engraving is prepared in the same manner as in Preparation Example 26 except that the composition of ink material in ink 1 for inkjet engraving is replaced with the ink material composition shown in Table 3. Inkjet Engraving Inkjet engraving is performed using devices V to VIII, as shown in the Figures. 14 to 17. Example 1
Application of Process Liquid Manufacture of an applicator described below as the applicator of processing fluid and carrying out the experiments of Examples and Comparative Examples using the inkjet engraving device shown in Figures 14 to 17 connected with the applicator. The applicator uses a roller formed by a chloroprene rubber coating with a thickness of 3 mm with a rubber hardness of 50 degrees to an iron material treated with galvanization with a diameter of 22 mm as the application roller and a roller made of SUS 304, with a diameter of 12 mm as the counter roll. The length of the rollers in the longitudinal direction is 300 mm. The processing fluid tank is arranged with a gap between the bottom of the application roller and the base of the tank of 2 mm. The application roller and the counter roller are arranged to be able to arbitrarily adjust the pressure between the rollers. The driving motor and the application roller are connected with gears. It is possible to drive the application roller at an arbitrary speed of rotation. The processing fluid is applied to the recording medium when the recording medium is introduced between the application roller and the counter roller. The amount of application of the processing fluid is controlled by adjusting the transfer speed and pressure between the application rollers and the counter roll. Image Formation Forms images using the inkjet engraving device illustrated in the Figure. 2. The conditions for the device are as follows. In an environment of a temperature of 22 ° C to 24 ° C and a relative humidity of 45% RH to 55% RH supply the processing fluid to the recording medium at a transfer speed of 500 m / s evenly across the roller application time with an arbitrary amount. Arrange the recording heads with a tilt angle θ to have a resolution of 600 dpi (Q = 42.33 μm) and discharge the ink droplet with a frequency of 11.81 KHz with a discharge volume of 9.5 pL . Change the main waveform of the recording head to form images with a resolution of 600 dpi x 600 dpi with an ink fixing amount of 5.61 g / m2. The arrangement of the devices is that the distance between the first processing fluid applicator 2 and the second processing fluid applicator 3 is 50 cm, the distance between the second processing fluid applicator 3 and the first recording head nozzle. 20 is 50 cm.
The transfer roller 13 controls the transfer speed of the recording medium 10 from the first processing fluid applicator 2 to the second processing fluid applicator 3 to arbitrarily control the time between when the processing fluid is applied to the first fluid applicator process 2 and when the process fluid is applied to the second process fluid applicator 3.
Recording Medium Details of the recording medium for use in the Examples and Comparative Examples are described below. * My Paper (quality paper): manufactured by Ricoh Co., Ltd .; Base weight: 69.6 g / m2; Design test: 23.2 seconds; Air permeability: 21 seconds; As shown in Table 4, using the imaging apparatus shown in Figure 14, apply Process Liquid 1 from Preparation Example 1 to one or both sides of the recording medium, in an amount of 1.60 g / cm2 and unload Ink 1 and Ink 4 prepared in the Preparation Examples in an amount of 5.61 g / cm2 to form images for evaluation.


The numbers for the type of processing fluid and the type of ink correspond to the numbers of the processing fluid and ink specified in the Process Liquid Preparation Examples and Ink Preparation Examples. Example 2 Form images for evaluation in the same way as in Example 1, except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in Table 4, after the time specified in Table 4, discharge the ink specified in Table 4, with an amount specified in Table 4. Example 3 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in Table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 4 Form images for evaluation in the same way as in Example 1 except that, using the i-forming apparatus image specified in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in Table 4, discharge the ink specified in Table 4 with a specified amount in Table 4. Example 5 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a reason specified in Table 4 with the elapsed time shown in Table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 6 Form images for evaluation in the same way as in Example 1 except that, using the image formation specified in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a ratio specified in Tabe 1 to 4 with the elapsed time shown in table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 7 Form images for evaluation in the same way as in Example 1 except that, using the specified image-forming apparatus in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in Table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 8 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in Table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 9 Form imagen s for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 10 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4 , apply the processing fluid specified in Table 4 to both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in Table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 11 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 on both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in Table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 12 Form images for evaluation of same as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 13 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the fluid process specified in Table 4 on both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in Table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 14 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 on both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in Table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 15 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in Table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 16 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in Table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 17 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 18 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium. ith a reason specified in Table 4 with the elapsed time shown in Table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 19 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in Table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 20 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in table 4, discharge the ink specified in Table 4 with a specific amount in Table 4. Example 21 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 22 Form images for evaluation in the same way as in Example 1 except, using the device image formation specified in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in Table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 23 Form images for evaluation in the same way as in Example 1 except that, using the image training device specified in Tab it 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in table 4, discharge the ink specified in Table 4 with an amount specified in Table 4 Example 24 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a specified ratio in Table 4 with the elapsed time shown in table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 25 Form images for evaluation in the same way as in Example 1 except that, using the image-forming apparatus specified in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a ratio specified in Table 4 with the elapsed time acid shown in table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 26 Form images for evaluation in the same way as in Example 1 except that, using the image apparatus specified in Table 4, apply the processing fluid specified in Table 4 on both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in Table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 27 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 28 Form images for evaluation of same as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 29 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the fluid process specified in Table 4 on both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in Table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 30 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Tab it 4 on both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 31 Form images for evaluation in the same way than in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in the table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 32 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 on both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in Table 4, discharge the specified ink n a Table 4 with an amount specified in Table 4. Example 33 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 to both the sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 34 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in Table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 35 Form images for evaluation in the same way as in Example 1 except that, using the d and image formation specified in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in Table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 36 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 to both sides of the medium of recording with a ratio specified in Table 4 with the elapsed time shown in table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 37 Form images for evaluation in the same way as in Example 1 except, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a special ratio ecified in Table 4 with the elapsed time shown in Table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 38 Form images for evaluation in the same way as in Example 1 except that, using the image specified in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in Table 4, discharge the ink specified in Table 4 with a specified amount in Table 4. Example 39 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a reason specified in Table 4 with the elapsed time shown in Table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example example 40 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 41 Form images for evaluation in the same way as in Example 1 except that, using the specified image formation apparatus in Table 4, apply the processing fluid specified in Table 4 to both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in Table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Example 42 Form images for evaluation in the same way as in Example 1 except that, using the image forming apparatus specified in Table 4, apply the flu processing oxide specified in Table 4 on both sides of the recording medium with a ratio specified in Table 4 with the elapsed time shown in table 4, discharge the ink specified in Table 4 with an amount specified in Table 4. Comparative Example 1 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 to one side of the recording medium with a ratio specified in Table 4 and discharge the ink specified in Table 4 with an amount specified in Table 4. Comparative Example 2 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 to one side of the recording medium with a ratio specified in Table 4 and discharge the ink specified in Table 4 with a specific amount Comparative Example 3 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 to one side of the recording medium with a ratio specified in Table 4 and discharge the ink specified in Table 4 with an amount specified in Table 4. Comparative Example 4 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 to one side of the recording medium with a ratio specified in Table 4 and discharge the ink specified in Table 4 with an amount specified in Table 4. Comparative Example 5 Form images for evaluation in the same way as in Example 1 except that, using the imaging apparatus specified in Table 4, apply the processing fluid specified in Table 4 to a side of the recording medium with a ratio specified in Table 4 and discharge the ink specified in Table 4 with an amount specified in Comparative Example 6 Form images for evaluation in the same way as in Example 1 except that, using the specified imaging apparatus in Table 4, apply the processing fluid specified in Table 4 to one side of the recording medium with a ratio specified in Table 4 and discharge the ink specified in Table 4 with an amount specified in Table 4. Image Density Evaluation Form images using the inkjet recording device shown in Table 5 under the same conditions as for the imaging method. Unload the ink separately (color by color) according to the image pattern in a 30 x 30 mm square on the print side and measure the color of the image by X-Rite 938, to determine the level according to the following criteria evaluation. Evaluation Criteria E (Excellent): Black: 1.3 or greater Yellow: 0.85 or greater Magenta: 1.05 or greater Cyan: 1.1 or greater G (Good): Black: 1.2 to less than 1 , 3 Yellow: 0.8 to less than 0.85 Magenta: 1.0 to less than 1.05 Cyan: 1.0 to less than 1.1 F (Regular): Black: 1.15 to less than 1, 2 Yellow: 0.75 to less than 0.8 Magenta: 0.95 to less than 1.0 Cyan: 0.95 to less than 1.0 B (Bad): Black: less than 1.15 Yellow: less than 0.75 Magenta: less than 0.95 Cyan: less than 0.95
Ripple Evaluation Form images using the inkjet engraving device shown in Table 5 under the same conditions as for the imaging method.
Forms a solid image across the recording medium, except for portions between all four sides and 15 mm from it, placing the transferred recording medium to the discharge unit on a flat surface with the printed face down manually within five seconds and measure the height of the four corners of the recording medium from the flat surface to determine the level according to the following evaluation criteria. Evaluation Criteria E (Excellent): less than 20 mm G (Good): 20 mm to less than 30 mm F (Fair): 30 mm to less than 40 mm B (Bad): 40 mm or more Evaluation of the Lithographic Process How in the same way as for the image density evaluation, discharge the ink separately in a 40 mm x 200 mm square on the printing side of the recording medium, roll a 40 mm diameter cylindrical polyethylene roller in the recording medium while it is pressed under a 5 N load within five seconds of printing, and measure the color of the portion of the recording medium to which the ink is re-transferred from the cylindrical roller by X-Rite 938 to determine the level according to following evaluation criteria. Evaluation Criteria E (Excellent): less than 0.1 G (Good): 0.1 to less than 0.15 F (Regular): 0.15 to less than 0.3 B (Bad): 0.3 or more The results are shown in Table 5. Evaluations are made for each color according to the respective evaluation criteria. The results of the image quality represent the 5 best evaluations. When the majority of ratings are two or more, the best ratings are selected. Table 5

As noted in the results, it can be seen that when images are formed immediately after application of the processing fluid of Comparative Examples 1 to 3 to the same imaging side, the 5 ripple results are poor.
It has been found that, in the case where the processing fluid of Comparative Examples 4 to 6 is applied only to the side where no image is formed, the curl is significantly reduced, but the image density is not improved.
In the case of Examples 1 to 3, where the processing fluid is first applied to the side of the recording medium opposite the side on which an image is not first formed, and then the processing fluid is applied to the side where an image is image is first formed before the image is formed, it has been found that the ripple is reduced equally, but its reduction impacts slightly less than Comparative Examples 4 to 6.
It has also been found that the processing fluid containing the agglomerating agent improves image quality.
In the case of Examples 4 to 6, where the processing fluid is first applied to the side of the recording medium on which an image is first formed and then the processing fluid is applied to the side opposite to the side on which an image is first formed, it has been found that the ripple is reduced equally for Comparative Examples 4 to 6 and the processing fluid containing the agglomerating agent improves the image density. It has been found that the ripple is reduced and the image quality is improved by the formation of images after application of the processing fluid to both sides of the recording medium.
As a result of the investigation of the time (hereinafter referred to as the application time) between when the processing fluid is applied to the side on which an image is first formed in the first processing fluid applicator and when the processing fluid is applied to the side wherein an image is formed second in the second applicator of processing fluid in Examples 7 to 14, it has been found that when the application time is 0.6 seconds or more, the reducing effect on the ripple is significant.
As a result of the investigation on the amount of application of the processing fluid in Examples 15 to 22, it was found that the curl is significantly improved when the amount is 0.96 g / cm2 or greater, and the resistance to the lithographic process ( drying property) improves when the amount is 2.41 g / cm2 or less.
As a result of the investigation of the types of ink by modifying the ink combination in Examples 23 to 25 of those in Examples 1 to 22, the same results are obtained. Therefore, it was found that the type of ink has little impact on the present disclosure.
As a result of the investigation of the types of processing fluid by changing the types of processing fluid in Examples 26 to 42 from those of Examples 1 to 22, it was found that the reduction of ripple is excellent when the water-soluble organic solvent in the processing fluid corresponds to 30% by weight or more, and the ratio of the water-soluble organic solvent B with a small moisture balance is 80% by weight or more.

权利要求:
Claims (12)
[0001]
1. Image formation method characterized by the fact that it comprises: applying a processing fluid for inkjet engraving to both sides of a recording medium, and in which the application of processing fluid includes: first applying the processing fluid processing on one side of the recording medium on which the image is formed, and then applying the processing fluid to a reverse side of the recording medium, and application of the processing fluid to the reverse side of the recording medium starts 0.6 seconds or more after a start of said first application of the processing fluid to the side of the recording medium on which the image is formed; and after applying the processing fluid, discharge the ink on at least one side of the recording medium to form an image on it, wherein the processing fluid for the inkjet recording comprises water and a water-soluble organic solvent.
[0002]
2. Image formation method, according to claim 1, characterized by the fact that a fixing amount of the processing fluid per side in the processing fluid application step is from 0.96 g / m2 to 2.5 g / m2.
[0003]
3. Imaging method according to claim 1, characterized by the fact that a water-soluble organic solvent content is 30% by weight or more based on a total amount of processing fluid.
[0004]
4. Image formation method according to claim 1, characterized by the fact that the water-soluble organic solvent comprises two water-soluble organic solvents A and B, in which the water-soluble organic solvent A has an equilibrium humidity of less than 30% by weight at a temperature of 23 ° C and a relative humidity of 80%, and comprises 80% of the water-soluble organic solvent by weight.
[0005]
5. Imaging method according to claim 1, characterized by the fact that the processing fluid comprises a water-soluble agglomeration agent, a surface active agent, a water-soluble organic solvent and water.
[0006]
6. Image formation method characterized by the fact that it comprises: applying a processing fluid for inkjet engraving to both sides of a recording medium, and in which the application of processing fluid includes: first applying the processing fluid processing on a reverse side of the recording medium, and then applying the processing fluid to a side of the recording medium on which an image is formed; and after application of the processing fluid, discharge the ink on at least one side of the recording medium to form an image thereon, wherein the processing fluid for the ink jet recording comprises water and a water-soluble organic solvent.
[0007]
7. Image formation method according to claim 6, characterized in that the subsequent application of the processing fluid to the reverse side of the recording medium starts 0.6 seconds or more after the first application of the fluid begins of processing to the side of the recording medium on which the image is formed.
[0008]
8. Image-forming method according to claim 6, characterized in that the amount of fixation of the processing fluid per side in the application step of the processing fluid is from 0.96 g / m2 to 2.5 g / m2.
[0009]
9. Imaging method according to claim 6, characterized by the fact that a water-soluble organic solvent content is 30% by weight or more based on a total amount of processing fluid.
[0010]
10. Image formation method according to claim 6, characterized by the fact that the water-soluble organic solvent comprises two water-soluble organic solvents A and B, in which the water-soluble organic solvent A has an equilibrium humidity of less than 30% by weight at a temperature of 23 ° C and a relative humidity of 80%, and comprises 80% of the water-soluble organic solvent by weight.
[0011]
11. Imaging method according to claim 6, characterized in that the processing fluid comprises a water-soluble agglomerating agent, a surface active agent, a water-soluble organic solvent, and water.
[0012]
12. Inkjet engraving device configured to carry out the method as defined in any one of claims 1 to 12, characterized by the fact that it comprises: an inkjet engraving unit (1); a first processing fluid applicator (2); a second processing fluid applicator (3); an inkjet print transfer unit (4); a sheet feeder (5); and a sheet feeder (6).

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CN102991130A|2013-03-27|

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法律状态:
2013-11-26| B03A| Publication of an application: publication of a patent application or of a certificate of addition of invention|

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2018-03-27| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|

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2019-07-09| B06T| Formal requirements before examination|

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2019-09-17| B06G| Technical and formal requirements: other requirements|

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2020-04-28| B06A| Notification to applicant to reply to the report for non-patentability or inadequacy of the application according art. 36 industrial patent law|

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2020-11-10| B09A| Decision: intention to grant|

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2021-01-19| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 17/09/2012, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

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申请号 | 申请日 | 专利标题

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JP2011201278|2011-09-15|

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JP2011-201278|2011-09-15|

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JP2011-193441|2012-09-03|

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JP2012193441A|JP6051695B2|2011-09-15|2012-09-03|Image forming method and inkjet image forming apparatus for carrying out the image forming method|

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