• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a glass container comprising an outer glass surface with an ink-jet printed image applied to said surface, characterized in that an at least partially water-soluble CEC with a thickness of 0.002 to 10 microns is present between the outer glass surface and the ink-jet printed image. Such a glass container is preferably a disposable beverage bottle. In addition, the present invention relates to a method for ink-jet printing an image on a glass container comprising the steps of: a) producing a glass container comprising an at least partially water-soluble CEC with a thickness of 0.002 to 10 microns, b) the ink-jet printing of an image on the glass container.
    公开号:BE1025819B1
    申请号:E20175348
    申请日:2017-05-11
    公开日:2019-09-03
    发明作者:Marin Steenackers；De Velde Johan Van；Johan Vandecruys；Graaf Frederik Fernand S De
    申请人:Anheuser Busch Inbev Nv；
    IPC主号:
    专利说明:

    Glass container comprising an ink-jet printed image and a method for producing it. Field of the invention
    The present invention relates to glass containers, more specifically glass bottles, decorated with printed images on the glass surface. Furthermore, the present invention relates to a method for producing such glass containers.
    BACKGROUND OF THE INVENTION
    It is well known in the art that beverage bottles carry a smooth and protective transparent coating on their outer surface, the so-called cold-end coating (CEC). Such a CEC prevents the glass container from being scratched and protects it in an abrasive or corrosive environment. The CEC, typically a polyethylene wax, ensures that the glass surface becomes smooth. The resulting low coefficient of friction reduces the force of contact between bottles in bottle columns and transport. Bottles coated in this way move freely through inspection and filling lines and undergo less surface damage. A damaged surface looks bad for the consumer and weakens the glass, often resulting in premature breaking. In addition, instead of withstanding an increase in bursting pressure, the bottle can be made lighter without sacrificing strength.
    Today, a two-step coating is applied to the production of glass containers to ensure scratch resistance and smoothness of the glass containers
    BE2017 / 5348. In the first step, the so-called hot-end coating (HEC) is typically applied by chemical vapor deposition (CDA) of a metal-containing compound to the freshly formed, hot and single or double-line glass containers. Such an HEC is based on a coating precursor comprising tin, titanium, other heat-decomposable metals or organometallic compounds. This application takes place in a so-called coating tunnel or coating hood where the HEC is applied by chemical vapor deposition to form a thin layer of a metal oxide, for example tin oxide. The intention is to coat the outside of the glass container with a homogeneous uniform layer, with the exception of the so-called final layer. Because this is carried out in the vapor phase and on glass containers that are moved in one line, a homogeneous distribution can easily be obtained. The thin layer of metal oxide, often tin oxide, forms the basis for the second coating, the so-called cold-end coating (CEC). After the HEC application, the glass containers are usually passed through a special type of oven, also called a cooling oven. The latter is specifically designed for tempering glass and for cooling the containers in a controlled manner. The glass is heated to the annealing point and then cooled slowly. This process reduces the internal stresses, making the glass more durable.
    In a subsequent process step, images of the logo, ingredients, etc. corresponding to the contents of the bottle are typically printed on the CEC, e.g.
    BE2017 / 5348 by screen printing.
    However, an important problem is that in all industries, more specifically the packaging industry, printing is increasingly moving towards digitization with higher speed, quality, flexibility and efficiency. Unfortunately, screen printing is not a digital printing technique, and, for example, ink-jet printing is. Offset and flexographic printing systems for printing applications are also increasingly being replaced by industrial ink-jet printing systems because of their flexibility in use, eg variable data printing, and because of their increased reliability, so that they can be included in production lines.
    In ink-jet printing, small droplets of liquid ink are projected directly onto an ink-receiving surface without physical contact between the printer and the ink receiver. The printing device electronically stores the print data and controls a mechanism for image-wise projecting the drops. Printing is accomplished by moving a printhead over the ink receiver or vice versa, or both.
    When spraying the ink-jet ink onto an ink receiver, the ink typically comprises a liquid carrier and one or more solids, such as dyes or pigments and polymers. Ink compositions can be roughly subdivided into: water-based, the drying mechanism comprising absorption, penetration and evaporation; solvent based, the drying mainly comprising evaporation; oil-based, involving drying absorption and penetration
    BE2017 / 5348; hot melt or phase change, where the ink is liquid at spray temperature but solid at room temperature and where drying is replaced by solidification; and energy curable, the drying being replaced by polymerization induced by exposure of the ink to a radiation or thermal energy source.
    The first three types of ink compositions are more suitable for an absorbent receiving medium, while hot melt inks and energy-curable inks can also be printed on non-absorbent ink receivers. Due to thermal requirements imposed by hot melt inks on the substrates, curable inks that have become curable in particular have become more interesting for the packaging industry.
    However, ink-jet printing on glass receptacles that require a CEC during production for the above reasons, such as bottles, has proven to be still difficult and result in poor image quality of the prints.
    As a result, there remains a need for optimized ink-jet printing methods for glass containers that require a CEC, especially in high-speed processes such as beverage bottle columns.
    Summary of the invention
    The present invention relates to a glass container comprising an outer glass surface with an ink-jet printed image applied to said surface, characterized in that an at least partially water-soluble CEC with a thickness of 0.002 to 10 microns is present between the
    BE2017 / 5348 outer glass surface and the ink-jet printed image.
    Such a glass container is preferably a disposable beverage bottle.
    In addition, the present invention relates to a method for ink-jet printing an image on a glass container comprising the steps of:
    a) producing a glass container with an at least partially water-soluble CEC layer with a thickness of 0.002 to 10 microns,
    b) ink-jet printing of an image on the glass container.
    Detailed description of the invention
    It was unexpectedly found that by ink-jet printing on an at least partially water-soluble CEC with a thickness of 0.002 to 10 microns, adhesion and print quality of the prints, e.g. color deviations, and resolution have been significantly improved compared to print quality on a glass substrate with water-insoluble CEC.
    Therefore, in a first embodiment, the present invention provides a glass container comprising an outer glass surface with an ink-jet printed image disposed on said surface, characterized in that a partially water-soluble CEC with a thickness of 0.002 to 10 microns is present between the outer glass surface and the ink-jet printed image. The thickness of the CEC is preferably between 0.005 and 1 micron, and even more preferably between 0.005 and 0.5 micron. A
    BE2017 / 5348 thickness of 5 nm is equivalent to one or a few monolayers.
    Furthermore, an embodiment can be provided in which a so-called hot-end coating (HEC) can be present between the outer glass surface and the CEC.
    The HEC typically comprises a metal oxide layer, typically a layer of 5 to 20 nm. More specifically, said metal oxide in the metal oxide layer can be selected from the group comprising: tin oxide, titanium oxide, zirconium oxide and / or combinations thereof, as described in US 3952118 and US 489816.
    In a specific embodiment of the present invention, the metal oxide of the HEC may be a tin oxide obtained from monobutyl tin chloride (MBTC) as a precursor.
    In an embodiment of a glass container of the present invention, the CEC can be at least partially water-soluble between 20 and 90 ° C, preferably at 50 ° C. In addition to advantages in the production of ink-jet printed glass containers as will be explained further in this text, an at least partially water-soluble CEC can be advantageous for recycling disposable glass waste because it can be at least partially removed by rinsing with water between 20 and 90 ° C, preferably at 50 ° C.
    In the context of the present invention, the CEC that is at least partially water-soluble is interpreted as being the CEC that is at least partially removable by technically
    BE2017 / 5348 water, tap water, purified water or distilled water so that the sliding angle of the bottle increases by at least 6 ° after washing. Before washing. Sliding angles are determined by placing one bottle on top of two horizontal bottles of the same type, in line contact. The tilt angle is increased at a certain speed and the tilt angle at which the upper bottle starts to slip is called the sliding angle. A sliding angle can have a value of more than 30 ° to less than 10 °.
    More specifically, the at least partially water-soluble CEC may be based on fatty acid, preferably based on stearate. In another specific preferred embodiment, the at least partially water-soluble CEC may be based on polyethylene glycol.
    In another embodiment of a glass container of the present invention, the CEC can be at least partially oxidized by flame, corona or plasma treatment. It is known in the art that screen printing inks do not adhere well to glass containers that have been treated with CEC, and that flame, corona or plasma energy can be applied to the glass containers to provide better adhesion of an organic coating (e.g. a ink-jet ink) thereon.
    Furthermore, a glass container according to the present invention may contain a silicon-containing layer, preferably a silica-containing layer (e.g. pyrosil), between the CEC and the ink-jet printed image. Such a silicon-containing layer provides increased binding sites for the ink jet
    BE2017 / 5348 printed layer (s). Furthermore, they can result in a rough nano-porous material surface for increased adhesion and a surface with a higher surface energy. It can, for example, be deposited by flame pyrolysis. Precursors can be applied as a vapor, an atomized liquid, an atomized solution, and / or the like.
    A primer layer may be present between the CEC and the ink-jet printed image to increase ink adhesion. Such a primer can be pigmented, white or transparent, and can include an adhesion promoter. Such a primer can also be oxidized by flame, corona, or plasma treatment to increase adhesion of the ink-jet ink. A white pigmented primer, typically containing e.g. titanium dioxide, is preferably used to enhance the contrast and vividness of color inks printed on a primed substrate. This is especially effective when the substrate is transparent. More specifically, the primer may comprise a radically reactive group moiety such as a thiol group, an amine group, or an ethylenically unsaturated group such as a vinyl ether, a vinyl ester, an acrylamide, a methacrylamide, a styrile, or preferably an allyl, an acrylate, or a methacrylate.
    The ink-jet printed image on a glass container according to the present invention can comprise one or more layers of ink, preferably energy-cured ink, i.e. the ink can be cured in any suitable manner, for example, cured by irradiation by any suitable type of
    BE2017 / 5348 irradiation such as, for example, ultraviolet, electron beam, or the like, or thermally cured by a convection oven, infrared lamps, or the like, or a combination of both radiation and thermal energy.
    A protective layer and / or clear coating can be applied to the ink-jet printed glass container to protect the image and / or obtain a more glossy or matte impression (or other optical effect).
    The ink-jet printed image can have a printing resolution of at least 300 dpi.
    After printing, a coefficient of friction-reducing coating can be applied to the entire glass container.
    A glass container according to the present invention can be a glass bottle, preferably a beverage bottle and most preferably a disposable beverage bottle. A reusable glass container that after use is exposed to corrosive rinsing agents would no longer show HEC after a limited number of games.
    Furthermore, a glass container according to the present invention can preferably be a cylindrical bottle.
    In an additional aspect of the present invention, there is provided an embodiment of a method for ink-jet printing an image on a glass container comprising the steps of:
    a) producing a glass container comprising an at least partially water-soluble CEC with a thickness of 0.002 to 10 microns,
    BE2017 / 5348
    b) ink-jet printing of an image on the glass container.
    The thickness of the CEC is preferably between 5 nm and 1 micrometer, and more preferably between 5 nm and 0.5 micrometer.
    The at least partially soluble CEC can be a CEC that is soluble in tap water or distilled water at a temperature between 20 ° C and 90 ° C, preferably at 50 ° C.
    Alternatively, in an embodiment of the present invention, a method for ink-jet printing of an image on a glass container is provided, wherein a primer layer is applied to the CEC and before ink-jet printing of an image on the glass container. Such a primer can be pigmented, white or transparent, and can include an adhesion promoter. Such a primer can also be curable by energy so that the ink-jet ink can be irradiated on the wet primer, the ink-jet ink having a viscosity that is lower than the viscosity of the primer, and wherein the primer and the ink-jet ink can be cured simultaneously by energy. Such a primer can be pigmented, white or transparent, and can include an adhesion promoter. Such a primer can also be oxidized by flame, corona, or plasma treatment to improve ink-jet ink adhesion. White pigmented primer, typically containing e.g. titanium dioxide, is preferably used to control the contrast and vividness of color inks printed on a primed substrate.
    BE2017 / 5348. This is especially effective when the substrate is transparent. More specifically, the primer may be a radically reactive group moiety such as a thiol group, an amine group, or an ethylenically unsaturated group such as a vinyl ether, a vinyl ester, an acrylamide, a methacrylamide, a styrile, or preferably an allyl, an acrylate, or a methacrylate.
    The CEC can be at least partially oxidized by flame, corona, or plasma treatment to enhance adhesion of the ink-jet ink thereon.
    In a further embodiment of the present invention, after the flame, corona, or plasma treatment, a silica-based, preferably silicate-based, layer may be applied to the at least partially oxidized CEC. Such a silica-containing layer provides improved binding sites for the ink-jet layer (s). It can, for example, be deposited by flame pyrolysis. Precursors can be applied as a vapor, an atomized liquid, an atomized solution, and / or the like.
    In a further embodiment of the present invention, after the flame, corona, or plasma treatment, a silicon-based, preferably silica-based (e.g. pyrosil) layer may be applied to the glass container. This silicon-based layer can thus be applied to at least partially oxidized CEC before ink-jet printing of the image. Such a silicon-containing layer provides improved binding sites for the
    BE2017 / 5348 inkjet layer (s). Furthermore, they can result in a rough nano-porous material surface for increased adhesion and a surface with a higher surface energy. It can therefore, for example, be deposited by flame pyrolysis. Precursors can be applied as a vapor, an atomized liquid, an atomized solution, and / or the like.
    Glass containers produced according to a method of the present invention are preferably filled after ink-jet printing of the image thereon in order to prevent damage to the ink-jet printer due to accidental bursting of the filled glass container.
    In the ink-jet printing step, the ink-jet printhead can scan back and forth in a longitudinal direction over the moving glass container, and the ink-jet printhead cannot print on the return. However, bi-directional printing may be applied and may be preferred for obtaining a high area throughput on large glass containers. Another preferred printing method can also print in multiple passages, except in the transverse direction (circular around the bottle). In this method, the relative position of the bottle versus the print head can be changed after each passage to print images larger than the size of a print head. This makes attachment of the print artwork necessary. Another variation on this method uses relative movement of the bottle vs the print head during the printing of the different passages: one obtains spiral printing over the
    BE2017 / 5348 bottle. In the latter case, the attachment defects are less pronounced. Another preferred printing method can be a single-pass printing process that can be performed by means of wide ink-jet printheads or multiple ink-jet printheads that cover the full width of the image to be printed (stacked or interconnected). In a single-pass printing process, the ink-jet printheads usually remain stationary and the substrate surface is moved under the ink-jet printheads.
    Ink-jet printing techniques as used in the present invention can be piezo-electric ink-jet printing, continuous type and thermal, electrostatic and acoustic drop-on-demand type.
    A preferred blasting temperature is between 10 and 70 ° C, more preferably between 20 and 60 ° C, and most preferably between 25 and 45 ° C.
    Non-curing solution or water-based ink-jet inks may be used, but energy-curable ink-jet ink is preferably used. Irradiation-curable ink-jet ink can be cured by exposure to actinic irradiation and / or by curing with electron beams. Curing by irradiation is preferably carried out by a general exposure to actinic radiation or by a general curing with electron beams. Thermally curable ink-jet ink can be cured by convection oven, infrared lamps, or the like.
    BE2017 / 5348
    The curing means can be applied in combination with the printhead of the ink-jet printer and move with it so that the ink-jet ink is exposed to curing energy just after the jet. In such an arrangement, it may be difficult to provide an energy source that is small enough to be connected to and move with the printhead. Therefore, a static, solid energy source can be used, e.g. a source of curing UV light, connected to the radiation source by means of flexible radiation guide means such as an optical fiber bundle or an internal reflective flexible tube. Alternatively, the actinic radiation from a solid source can be applied to the printhead by an arrangement of mirrors comprising a mirror on the printhead.
    The radiation source arranged not to move with the printhead may also be an elongated radiation source that extends transversely over the ink layer (s) to be cured and adjacent a transversal route of the printhead so that the successive rows of images transmitted through the printhead be formed, stepwise or continuously, under that radiation source. The radiation source is preferably an ultraviolet radiation source, such as a high or low pressure mercury lamp which optionally includes inclined elements, a cold cathode tube, a black light, an ultraviolet LED, an ultraviolet laser or a flashing light.
    Furthermore, it is possible to cure the ink-jet printed image by, sequentially, or
    BE2017 / 5348 simultaneously, two light sources of different wavelength or illuminance. For example, the first UV source can be selected to be rich in UV-A, e.g. a gallium-dipped lamp, or another lamp with both high UV-A and UV content. The second UV source can then be rich in UV-C, more specifically in the range of 260 nm - 200 nm. The use of two UV sources has been shown to provide advantages, e.g. a fast cure speed.
    To facilitate the curing, the ink-jet printer often comprises one or more oxygen depletion units. The oxygen depletion units place a blanket of nitrogen or other relatively inert gas (e.g., CO2), with controllable position and controllable inert gas concentration, in order to reduce the oxygen concentration in the curing environment. Oxygen can indeed serve as a radical scavenger that removes available radicals from the polymerization reaction. Residual oxygen levels are usually maintained at 200 ppm, but are generally in the range of 200 ppm to 1200 ppm.
    In the context of the present invention, the image to be printed can include any type of photo, logo, text, graphic art, coding (QR code, barcode) and the like.
    Examples:
    Materials and procedures:
    Bottle samples:
    Bottles A: Unprinted 12 oz (35 cl) Victoria bottles (amber glass) were purchased from Nueva
    BE2017 / 5348
    Fâbrica Nacional de Vidrio, S.A. the central heating. (Mexico). These bottles were produced with a partially water-soluble CEC based on ARCOSOL M-70, commercially available from ARCO, S.A. the central heating. (Mexico).
    Bottles B: Unprinted 33 cl brown Adriaan disposable bottles (amber glass) were purchased from Ardagh. These bottles were produced with a water-insoluble CEC based on RP 40, commercially available from Arkema.
    To press :
    Ink jet printing of the bottles was performed on a Laboratory Unit, commercially available from CURVINK bv (the Netherlands) equipped with a flame laboratory module and a primer application laboratory module. The following procedure was used to print the bottles:
    The bottles were burned with the flame laboratory module at a speed of 250 mm / sec. The bottles were sequentially coated in the flame laboratory module with pyrosil (commercially available from Sura Instruments). A pyrosil concentration of 0.2% was used and the pyrosil speed was set at level 15. The bottles were removed from the flame laboratory module and cooled under ambient conditions at room temperature. The bottles were sequentially coated with the primer application laboratory module by means of an alkoxysilane-based primer in a 2-revolution mode. The bottles were dried under ambient conditions for 8 minutes. The bottles were consecutively in the
    BE2017 / 5348 ink jet module and the bottle body was printed with an ink jet with a UV-curable acrylic white ink. The white ink was blasted with a GS12 XAAR 1001 head in a single pass with gray-scale level 5. A uniform, completely white design as well as text was printed. The pin level was set at 1% and was executed with an 8W LED bar from Hoenle. Finally, the bottles were taken out of the ink-jet module and fully cured with a UV light bulb in an 8 rotation mode.
    Pasteurization simulator:
    The bottles were placed in a water bath to simulate a pasteurization process. The following temperature program was followed: 10 minutes at 45 ° C, 20 minutes at 62 ° C and 10 minutes at 30 ° C. The bottles were removed from the water bath and dried at ambient temperature.
    Line simulator:
    For each condition, 28 bottles were placed in a line simulator that is commercially available from Agr International, Ine. This simulates the circumstances in which a bottle undergoes a packaging line. The following settings were selected: water faucet on; wear plate + height with EFG-2; speed control at 8 (60 rpm); port pressure with 40% sliding (36 rpm for bottles). The bottles were placed in the line simulator for 30 minutes and visually inspected for possible damage to the artwork.
    Results :
    Bottles A and B were printed according to the higher
    BE2017 / 5348. It has been found that the print quality of the prints on Bottles A was better than the print quality of the prints on bottle B. In particular, the printed text exhibited print defects on Bottle B than on Bottle A. The bottles were sequentially placed in a pasteurization simulator and line simulator and visually inspected. It has been established that the printed artwork on bottles B showed much more damage than the printed artwork on bottles A.
    权利要求:
    Claims (19)
    [1]
    CONCLUSIONS
    1. - Glass container with an outer glass surface with an ink-jet printed image applied to said surface, characterized in that an at least partially water-soluble CEC with a thickness of 0.002 to 10 microns is present between the outer glass surface and the ink-jet printed image .
    [2]
    The glass container of claim 1, wherein an HEC is present between the outer glass surface and the CEC or between the outer glass surface and the ink-jet printed image.
    [3]
    Glass container according to one of the preceding claims, wherein said HEC layer is a metal oxide layer.
    [4]
    The glass container of claim 3, wherein said metal oxide is the metal oxide layer selected from the group consisting of: tin oxide, titanium oxide, zirconium oxide and / or combinations thereof.
    [5]
    Glass container according to claim 3, wherein said metal oxide is tin oxide obtained from monobutyl tin chloride as a precursor.
    [6]
    Glass container according to any one of the preceding claims, wherein said CEC is at least partially soluble in water at 50 ° C.
    [7]
    Glass container according to one of the preceding claims, wherein said CEC is based on fatty acid or on polyethylene glycol.
    [8]
    The glass container of claim 6, wherein said CEC is at least partially oxidized by flame or plasma treatment.
    BE2017 / 5348
    [9]
    A glass container according to claim 6, 7 or 8, comprising a silica-containing layer between the CEC and the ink-jet printed image.
    [10]
    10. Glass container according to one of the preceding claims, comprising a primer layer
    present between the outer glass surface and the ink-jet printed image. 11.- Glass container according to conclusion 10 wherein said primer is white or is transparent and a adhesion promoter. 12.- Glass container according to conclusion 11,
    wherein said ink-jet printed image comprises one or more layers of energy-cured ink.
    [11]
    A glass container according to any one of the preceding claims, comprising a protective layer and / or a clear coating on top of the ink-jet printed image.
    [12]
    A glass container according to any one of the preceding claims, wherein the ink-jet printed image has a print resolution of at least 300 dpi.
    [13]
    Glass container according to one of the preceding claims, wherein the glass container is a glass bottle, preferably a beverage bottle and most preferably a disposable beverage bottle.
    [14]
    16. - Method for ink-jet printing an image on a glass container comprising the steps of:
    a) producing a glass container comprising an at least partially water-soluble CEC layer with a thickness of
    0.002 to
    BE2017 / 5348
    10 micrometer,
    b) ink-jet printing of an image on the glass container.
    [15]
    A method according to any one of claims 16, comprising the step of applying a primer layer to the glass container before ink-jet printing an image on the glass container.
    [16]
    A method according to any of claims 16 or 17, further comprising the step of flame or plasma treatment of the CEC or primer layer prior to ink-jet printing of an image on the glass container.
    [17]
    The method of any one of claims 18, further comprising the step of applying a silica layer to the glass container after the flame or plasma treatment.
    [18]
    A method according to any of claims 16 to 19, comprising the step of applying a protective layer and / or clear coating on top of the ink-jet printed image.
    [19]
    A method according to any of claims 16 to 20, comprising the steps of filling the container with a liquid, preferably a beverage, after ink-jet printing the image thereon.
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    同族专利:
    公开号 | 公开日
    JP2019521938A|2019-08-08|
    WO2017194653A1|2017-11-16|
    PL3455181T3|2022-02-07|
    CN109562982A|2019-04-02|
    MX2018013692A|2019-07-18|
    AR108433A1|2018-08-22|
    US20190152843A1|2019-05-23|
    AU2017264560A1|2018-11-15|
    EP3455181B1|2021-09-22|
    EP3455181A1|2019-03-20|
    CA3023816A1|2017-11-16|
    KR20190028654A|2019-03-19|
    RU2018141750A|2020-06-15|
    EP3243805A1|2017-11-15|
    BE1025819A1|2019-07-16|
    BR112018073144A2|2019-03-12|
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    法律状态:
    2019-10-17| FG| Patent granted|Effective date: 20190903 |
    优先权:
    申请号 | 申请日 | 专利标题
    EP16169470.8A|EP3243805A1|2016-05-12|2016-05-12|A glass container having an inkjet printed image and a method for the manufacturing thereof|
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