• 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:
    Procedure and equipment to obtain a sheet to manufacture flexible packaging. Method for obtaining a sheet for manufacturing flexible containers (1) with at least two internal compartments (2) comprising starting from a base layer having an external face and an internal face, and then partially adhering to the inner face of the base layer an inner layer, said adhesion being carried out only in certain joint zones (3) that are smaller than the total surface of the inner face of the base layer. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2565567A1
    申请号:ES201630014
    申请日:2016-01-12
    公开日:2016-04-05
    发明作者:Francisco MARQUES GARCÍA
    申请人:Fina Flexible Packaging S A；Fina Flexible Packaging SA；
    IPC主号:
    专利说明:

    5
    10
    fifteen
    twenty
    25
    30
    35
    DESCRIPTION
    Procedure and equipment to obtain a sheet for manufacturing flexible containers TECHNICAL FIELD OF THE INVENTION
    A first aspect of the present invention relates to a process for obtaining a sheet for manufacturing flexible packages, while a second aspect refers to a device for obtaining said sheet, having application in the packaging industry, and more specifically in the Scope of flexible packaging comprising at least two compartments.
    Likewise, with the flexible sheet or film obtained by the process of the invention flexible packages can be manufactured in standard automatic packaging machines currently available without the need for any type of adaptation.
    BACKGROUND OF THE INVENTION
    At present, a type of flexible package that is obtained in standard packaging machines from a flexible sheet or film is known, where said flexible packages are intended to contain products of all types, especially food products, with the particularity that once opened by the final consumer, the package is divided into two independent compartments. At the time of opening the package, in one of these compartments the packaged product is contained and the other is initially empty, so that in products that have a non-consumable part, such as shells, skins, barks, etc., the The consumer is depositing the non-consumable part in said initially empty compartment as the product is consumed.
    With these double compartment containers it is avoided that this type of waste is thrown into the environment without control, or that the consumer is forced to take a second independent container to the container to get rid of the non-consumable part. A container with two behaviors can be held in one hand while with the other hand you can perfectly take the product from the main compartment and deposit the waste in the secondary compartment, which is a great advantage over the case of two independent containers.
    5
    10
    fifteen
    twenty
    25
    30
    35
    An example of this type of packaging is bi-compartmentalized bags, as well as containers as described in the Spanish utility model application No. U201531070.
    However, the production of this type of packaging requires specific processes that do not allow the use of standard automatic packaging machines, which delays and increases the cost of the entire manufacturing process, and therefore its final cost.
    In any case, the industrial processes currently known to produce these packages do not allow the manufacture of packaging film that is intended for conventional packaging machines without the need for any type of mechanical or electronic improvement or modification.
    DESCRIPTION OF THE INVENTION
    The present invention relates to a process for obtaining a sheet for manufacturing flexible packages with at least two internal compartments as defined in claim 1. Particular embodiments of said process are defined in dependent claims 2 to 9. In claims 10 to 12 three alternatives are defined relative to a team in which to carry out the process of the invention. In claim 13, a process dependent on the process of the invention is defined by means of which a flexible container is obtained from said sheet.
    The method proposed by the invention comprises starting from a base layer having an outer face and an inner face. Well, according to the invention, the method comprises partially adhering an inner layer to the inner face of the base layer, said bonding being performed only in certain areas of joint that are smaller than the total surface of the inner face of the base layer .
    The present invention allows the manufacture of flexible film that can be used to make flexible packaging by means of existing automatic packaging machines and that manufacturers of all types of products, preferably food, use to provide the market with their product properly packaged for the purpose. to protect it from the manipulation of the consumer at the points of sale, while retaining the product in the best possible conditions within the period of preferential consumption thereof.
    Therefore, without ruling out uses in other types of final products, the invention has a
    5
    10
    fifteen
    twenty
    25
    30
    35
    special application in those food products that are consumed directly from the container and that have a disposable part, for example nuts such as sunflower seeds, pumpkins, peanuts, roasted almonds, pistachios, etc., where the consumer may have the option to remove the skin.
    There are multiple types of packaging machines on the market that in turn make up various types of packaging morphologies. The aforementioned products are usually packaged in packaging machines of the so-called "flow pack" type in which, from a single flexible film supplied by a film-in-coil converter, the packaging machine forms, fills the product, heat the film and cut it into individual containers, tightly sealed by heat sealing The heat sealing is feasible because the film supplied has that characteristic and the packaging machine has jaws that at the same time press two or more layers of the film and transfer enough heat for the film Develop your heat sealing characteristics.
    The heat sealing forces of the different films are variable depending on the types used in the manufacture of the final film, which is usually a combination of several individual films. In the packages that can be manufactured from this invention, the heat-sealing forces must be sufficient for the closure to be safe and airtight but they must allow manual opening of the container by pulling front and back of the container and from bottom to top in the upper area of the container, which is the usual way that consumers use to open these containers.
    The process of the invention allows the manufacture of a sheet or film intended to be used by standard packaging machines in which the final product is packaged. This film is manufactured by companies in the sector called "film converters", which are the ones that manufacture and deliver the sheets or films in reels to the final packer so that you can use them in your packaging machines. These films can be simple or complex, these The latter are formed by several individual films joined mainly by adhesive lamination processes, although there are also other methods such as extrusion lamination, hotmelt application, etc.
    The invention includes the necessary adaptations and the particular process to be used in the lamination of individual films for obtaining multilayer film, that is to say formed by at least two layers, that is the base layer and the inner layer, intended for packaging machines. to obtain final containers of two compartments or cavities such as
    5
    10
    fifteen
    twenty
    25
    30
    35
    mentioned above.
    The possibility is contemplated that the base layer in turn comprises a first layer adhered on its entire surface to a second layer, the inner face of the base layer being in the second layer, on the opposite side to that of union with the first layer cap. That is, as set forth in detail below, the invention contemplates obtaining sheets formed by at least three layers, that is, the base layer formed by a first layer and a second layer, in addition to the inner layer.
    The containers formed by the "flow pack" packaging machines are essentially "pad" type containers in which, from a film, the packaging machine joins the two longitudinal ends with a longitudinal jaw, filled with the product to be packaged, the packaging is carried out. Transverse sealing and the cut that divides the sealed area into two parts so that one corresponds to the top of the container and the other to the bottom of the next container.
    From this simpler type of "pad" packaging there are various adaptations of these "flow pack" packaging machines that allow variations to the morphology of the package, for example: side folds in the corners of the upper and lower sealing areas, known as "English fold", which allows the container in the lower area to be sufficiently flat so that the container can be held in an upright position.
    The present invention is applicable for all kinds of variations that can be made from the initial single pad type package.
    The automatic packaging machines of the state of the art, which are those that are also used with the sheet obtained with the process of the invention, use sheets or films composed of several layers of joined individual films. The present invention can be applied by transformers that use the technique of "adhesive lamination" to join the individual films that comprise it.
    The converters manufacture complex films from individual films of plastic polymers mainly, although in some cases other materials such as paper, cellophane and / or aluminum are also used in some of the layers of the final complex film, in order to add the properties thereof and offer the final packer the best
    5
    10
    fifteen
    twenty
    25
    30
    35
    benefits for the optimal conservation of the product in addition to the best presentation of the package to enhance its appeal. In addition to providing different preservation characteristics, these combinations also offer different properties such as: mechanical strengths, wide range of rigidity on demand, various sealing integrity features, ease of opening, etc. They also allow the printing of any graphic design with various technologies, mainly gravure and flexography. Taking advantage of the various layers of the final film, the printing inks usually go in "sandwich" between the layers, so that they are not in contact with the product, as required by legislation, and that they are also duly protected from mechanical aggressions and thermal, such as friction manipulation and in the packaging process, aggression of the jaws of the packaging machine, etc.
    Currently the combinations of films in the most common products in which this type of packaging can be applied, such as food products with a disposable nut-type part, consist of a monofilm that already has heat-sealing characteristics or two or three layers of films joined by lamination with adhesives. The appropriate combination of these films, allows the sum of them to bring the different characteristics to the final film.
    According to the number of layers of the film, the following can be considered:
    In the case of a monofilm the impression must go on the outer side. The closure of the container is done by choosing a film with heat sealing properties. The most common materials are polypropylene films of various types: coextruded and lacquered. In any case, for the application of the invention, that is, in order to obtain a container with at least two compartments, it is necessary to add a second film or layer per lamination, and preferably following a manufacturing method as described below.
    On the other hand, complexes or sheets of two films are the most common in two-compartment containers for food products. As the first material, the most external to the container, the most used are polypropylene films in all types: coextruded and lacquered, polyester film is also widely used. As a second material, the internal to the container, the most common is the heat-sealable metallized polypropylene, widely extended by having barrier qualities and therefore preservation of the product in addition to a correct heat sealing. Various types of PE film are also used as the second material because of their excellent sealing properties.
    5
    10
    fifteen
    twenty
    25
    30
    35
    For the development of the invention the combination of the two materials is made so that the second material is the one that performs the dividing function of the compartments but taking into account that the printing must go outside or leave the sealing areas free of ink crosswise if the inks are sandwiched between the two materials. This is because in the areas of transverse sealing both materials must be heat sealed and this is not possible if there are printing inks between them.
    It can also start from a three-layer film, where the composition of at least the third layer, which is the most internal to the container and acts as a separator between the two cavities, must be considered in the sense indicated above. You can also move from an initial complex of two layers to one of three layers to get the container of two cavities. The third material is the inner layer, that is, the one that separates internally when the container is opened from the other two films that remain joined by the lamination. The lamination between the outer material, that is the first layer of the base layer, and the intermediate, which is the second layer of the base layer, can be any conventional lamination and the inks can be sandwiched between these two materials. The object of the invention is applied in the second lamination, which is the one that joins the intermediate material and the third material, which is what remains inside the package in contact with the product.
    Therefore, it should be noted that one of the most important aspects of the present invention is that the film manufacturing process allows it to be used in conventional flow-pack type vertical and horizontal packaging machines, without having to carry out any type of adaptation or modification to said machines. The packaging machine is capable of forming conventional packages and, without changing the coil to one obtained by the process of the invention, subsequently forming double-cavity containers.
    The longitudinal sealing is carried out on the part of the film in which the lamination has been made completely, that is, all the films are laminated in that area. On the front of the package, the one that is free of the longitudinal seal has the last film, the innermost one, without adhesive, that is, it is not glued. When transverse sealing is performed, the internal material seals with itself by completely closing the main cavity with the product and at the same time on the other side it seals with the adjacent material because both materials have a compatible heat sealability. Therefore, in the upper and lower part of the container once fully thermoformed, the film is fully bonded in all its layers.
    5
    10
    fifteen
    twenty
    25
    30
    35
    When the opening of the container occurs, taking off the upper heat sealed area of the same, at the same time that we open the seal that closes the main compartment that contains the product, we also separate the last material from the adjoining one since both are only glued in the part of the heat-sealed zone and the rest is unlaminated being separated and forming the secondary cavity between it and the adjacent film of the complex. The two cavities are completely separated by the last film, the inner one, one full of the packaged product and the other vada.
    Finally, another aspect of the invention relates to a process for obtaining a flexible container with at least two internal compartments from a sheet obtained by a procedure such as the one described above, in which the method comprises using a conventional continuous automatic packaging machine. .
    DESCRIPTION OF THE DRAWINGS
    To complement the description that is being made and in order to help a better understanding of the features of the invention, according to a preferred example of practical realization thereof, an set of drawings is accompanied as an integral part of said description. For illustrative purposes and not limitation, the following has been represented:
    Figure 1.- Shows three views of packages formed in a standard vertical packaging machine that can be obtained with the sheet obtained with the process of the invention, where view A) shows a container with an English fold and flat bottom, view B) a single pad and sight C) one of the open containers with intermediate film that divides the interior into two cavities or internal compartments.
    Figure 2.- It shows two schematic views of a closed pad type container, the front face having been represented in view A), the upper and lower transverse seals being seen, and in view B) the rear face, also being seen, the sealing longitudinal.
    Figure 3.- Shows the container represented in Figure 3 but opened or unfolded prior to its closure, showing on the right what will be the longitudinal sealing and leaving the surface corresponding to the front face in the central area and at the ends the surfaces that correspond to the rear face.
    5
    10
    fifteen
    twenty
    25
    30
    35
    Figure 4.- Shows a schematic representation of a sheet service coil obtained with the process of the invention prepared to be used in a packaging machine, the sequence of packages and their macula position can be appreciated for photocell reading of the packaging machine.
    Figure 5: - Shows a scheme of a realization of the coil in the manufacturing process of the converter, where two formats are then worked, which will then be separated into two individual format coils, such as the one shown in Figure 4, by the cutting process and final rewind, having represented the areas with and without adhesive of the second lamination, which allows to obtain a final container with two cavities.
    Figure 6: - Shows a first embodiment of the equipment of the invention where a shirt for applying adhesive with solvents by flexography technique has been represented, so that in the areas of film that coincide with those of raised relief adhesive is applied while in the sales does not apply.
    Figure 7.- Shows a second embodiment of the equipment of the invention where an engraving roller in cells or gravure cylinder for applying adhesive with solvents has been represented, said cylinder being engraved of copper or steel and subsequently chromed. If the engraving is electromechanical, it is done by means of a diamond point incision, another technique is laser engraved and can also be chemically recorded.
    Figure 8.- It shows a third embodiment of the equipment where a special rubber roller has been represented for application of adhesives without solvents, being able to appreciate the realization of a recess in the areas where adhesive is not going to be applied, so that the areas Highlighted embossed apply adhesive on the film and correspond to the areas where the third material is required to be laminated with the intermediate material.
    PREFERRED EMBODIMENT OF THE INVENTION
    In view of the figures summarized, it can be observed that in one of the possible embodiments of the invention the process for obtaining a sheet for manufacturing flexible packages (1) with at least two internal compartments (2), which the invention proposes, comprises starting from a base layer that has an outer face and an inner face. The process comprises partially adhering an inner layer to the inner face of the base layer, said adhesion being carried out only in certain joining areas (3)
    5
    10
    fifteen
    twenty
    25
    30
    35
    which are smaller than the total surface of the inner face of the base layer.
    According to a preferred embodiment, the sheet comprises three layers, so that the base layer in turn comprises a first layer adhered on its entire surface to a second layer, the inner face of the base layer being on the second layer, in the opposite side of the union with the first layer.
    The sheet is obtained in coil format (4), so that the joining areas (3) between the base layer and the inner layer are located in the extreme areas (4 ') of the coil (4), while in the central zone (4 '') said base and inner layer are not adhered.
    Attending to the preferred embodiment of a final film or three-layer laminate, which is considered to be the most advisable case to combine conservation properties of the product with the peculiarity of the two-cavity container that does not concern us, it is also possible to apply it in both As already described above, in this case the special lamination process object of the present invention is applied in the only lamination that exists between the two materials.
    In a complex of three layers in standard single cavity containers, the converter joins the three films by means of two successive lamination processes by extrusion of molten polymer or by adhesive, the latter is the most widely used.
    The lamination of the three films is total forming a block the final film as if it were a single film. For the packer that uses this film in its automatic packaging machines, the film that it receives is unique and indivisible without the various layers being visible to the naked eye, being in solidarity and totally united. The converter, with some exceptions, uses the first material, the outermost one, to support the printing process, and successively laminates the second and third materials in two successive lamination processes. This process is performed on specific film laminating machines.
    The present invention so that the third film serves as a separation between the two cavities of the final container, should be laminated in a "partial" way, in zones and this is the differentiation of the invention from conventional lamination. The object of this invention is the special lamination process itself that is required to be able to laminate in areas in addition to the adequate choice of the laminated and non-laminated areas so that the final container when opened is divided into the two cavities by means of the third material , the one left in the
    5
    10
    fifteen
    twenty
    25
    30
    35
    inside the container and in contact with the packaged product.
    Another key aspect of this invention is the correct choice of the internal film that will be the one that divides the two cavities. This material must be heat sealable on both sides and also the face that is in contact with the second material, (the one immediately following it on the different layers of the film), must have a heat seal compatible with this second material.
    Since there is an area where the internal material is not laminated with the previous one, since it has to form the second cavity, it must be heat sealed in the area of the transverse jaws both against itself, for the hermetic closing of the container in the area that contains the product, as well as allowing it to heat with the adjoining material in the areas where it is not laminated with it, so that in the final container there is no separation between the layers when it is closed and only "peel off" when the area is opened upper transverse sealing of the container.
    They are not going to describe all the possible combinations of individual films that can be used in the composition of the final complex film since they are almost infinite in types of materials and thicknesses of the same. The selection criteria are justified by the qualities of protection, rigidity, aesthetic and functional, which are taken into account in these packages and in terms of the specific requirements to be able to develop the present film manufacturing process that allows the formation of the packaging of Two cavities, only consider the aforementioned with respect to the last material, the innermost of the container, which is heat sealable on the innermost side and in contact with the packaged product, and also that is heat sealable compatible with the following complex material on its face adjacent to it.
    Next, the combinations of films that are considered to be the most used are detailed, taking into account the specific application of nuts-type food products with a shell that, for conservation today, are packaged with a modified atmosphere and therefore require that the film of the container is a barrier to gases and water vapor:
    First combination: Layer 1: Transparent coextruded bioriented polypropylene + Layer 2: Metallized coextruded bioriented polypropylene + Layer 3: Transparent coextruded bioriented polypropylene.
    5
    10
    fifteen
    twenty
    25
    30
    35
    Second combination: Layer 1: Transparent coextruded bioriented polypropylene + Layer 2: Metallized coextruded bioriented polypropylene + Layer 3: White coextruded bioriented polypropylene.
    Third combination: Layer 1: transparent co-extruded bioriented polypropylene + layer 2: co-extruded bioriented polypropylene with EVOH barrier + layer 3: transparent coextruded bioriented polypropylene.
    Fourth combination: Layer 1: transparent co-extruded bioriented polypropylene + layer 2: co-extruded bioriented polypropylene with EVOH barrier + layer 3: white coextruded bioriented polypropylene.
    Fifth combination: Layer 1: transparent coextruded bioriented polypropylene + layer 2: acrylic lacquered bioriented polypropylene / PVdC + layer 3: transparent or white lacquered acrylic lacquered bioriented polypropylene.
    Sixth combination: Layer 1: transparent coextruded bioriented polypropylene + layer 2: acrylic lacquered bioriented polypropylene / PVOH + layer 3: transparent or white acrylic bioriented polypropylene.
    Seventh combination: Layer 1: transparent co-extruded bioriented polypropylene with silicon oxide or aluminum oxide coating + layer 2: transparent coextruded bioriented polypropylene + layer 3: transparent or white coextruded bioriented polypropylene.
    In any case, as indicated above, the necessary condition is that the material of layer 2 and that of layer 3 have compatible heat sealability between the two, this being one of the key aspects of the invention.
    On the other hand, the film that is supplied by the packer and that uses its packaging machine to thermoforming the container is a successive and sequential repetition of unfolded container units that then when folded and thermoformed in the sealing areas will form the final container. Longitudinally, the closing and cutting order is given by a photocell that reads a printed mark so that the packaging machine is synchronized with the printing and is closed and cut transversely right in the area where a container ends and the next one begins. Longitudinally the heat seal is a continuum in which they join
    5
    10
    fifteen
    twenty
    25
    30
    35
    the two ends of the film that have previously been folded by hugging a tube that can be round or square and thus forms the cavity and volume of the container, while the product to be packaged falls inside said tube. The transverse seal that seals and closes the container, is produced by a jaw that acts sequentially every time one of the aforementioned marks passes that is read by the photocell.
    Therefore, when the film is unfolded and flat, that is, as it comes out of the coil manufactured by the transformer, the central part of the film subsequently corresponds to the front area of the container when it is subsequently thermoformed, while the areas of the ends of the film will form the rear part of the container, joining both in the longitudinal sealing area that runs completely from top to bottom the container through the rear area of the same.
    The present invention allows the complex film to be manufactured so that the lamination of the last material, the innermost of the package and that remains in contact with the product, is not total, but that an area without adhesive will remain and therefore will not be this film is attached to the other adjacent film, which in the case of the triplex will be the intermediate film and in the case of a duplex complex it will be the outer film of the package. The area that remains unlaminated corresponds to the one that completely occupies the front or main face of the final container. The laminated areas are those corresponding to the two longitudinal ends of the film and which, when joined by longitudinal thermoforming, form the rear face of the final container. All this can be seen in figures 2 to 4.
    As for the manufacturing process, if the final film has more than two layers, the final lamination that joins the film that is inside the container in contact with the product and the immediate next one, is the only one that needs this special process of lamination, being able to be the other conventional laminations.
    For example, in a final three-layer film whose composition is:
    External film: transparent coextruded bioriented polypropylene No. 1 Intermediate film: metallized coextruded bioriented polypropylene.
    Internal film: transparent coextruded bioriented polypropylene n ° 2.
    The lamination between the outer and intermediate film is a conventional lamination and therefore joins the two films in their entire area. Therefore, all types can be applied
    5
    10
    fifteen
    twenty
    25
    30
    35
    Existing conventional lamination without modifications: solvent adhesives, solvent-free adhesives and extrusion lamination.
    The lamination between the intermediate film (metallized polypropylene) and the third material that is the internal film of the container, is the one that follows the special lamination process object of this invention, and which by means of the process described is capable of laminating areas applying the adhesive in some and leaving other areas free of it. This can be achieved with adhesive lamination and with the three types of application of existing lamination adhesives: solvent lamination gravure system, lamination with solvent adhesives flexography system and lamination with solvent free adhesives.
    Figure 5 shows a diagram of the coil in the manufacturing process of the converter. In this example we work in two formats that will then be separated into two individual format coils by the final cutting and rewinding process. In it the areas with and without adhesive of the second lamination have been represented and that allow to obtain the final container with two cavities.
    Special lamination by areas with adhesive technique with solvents by flexography. In this technique, the adhesive is first transferred by a fully engraved roller called anilox, which is the one that doses the amount depending on the type of engraving. As shown in Figure 6, this roller transfers the adhesive to a roller with an interchangeable sleeve (5) of variable width depending on the width of the film to be laminated. This shirt (5) is usually made of rubber or photopolymer type materials. The process described in this invention requires that the rubber or photopolymer jacket be highlighted and lowered in areas. The lowered areas will not be in contact with the anilox roller and therefore will not take adhesive. The highlighted areas will take adhesive by contact with the anilox and deposit it on the film only in those areas. The manufacturer of the shirt will be provided with some planes in which the protrusion and recess areas will be perfectly bounded.
    Special lamination by areas with solvent adhesive technique by engraving roller in cells (6) or gravure cylinder. As can be seen from Figure 7, in this technique a single roller engraved in cells (6) transfers the solvent adhesive directly to the film, the roller is cleaned of excess adhesive by a blade and the adhesive remains in the inside of the alveoli or cells. The film is pressed by
    5
    10
    fifteen
    twenty
    25
    30
    35
    on this cylinder or roller depositing the adhesive. These rollers are engraved by conventional gravure cylinder engraving techniques so it is possible to engrave them in certain areas and not in others. The bounded map of the areas that must be recorded and those that will be free of it will be supplied to the cylinder engraver.
    Special lamination by areas with solvent-free adhesive technique. The solvent-free adhesive application technique requires specific types of laminators, since given the high viscosity of these adhesives it is not possible to use prior application techniques based on flexography and gravure that require much lower product viscosities. This technique has the advantage that in the adhesive once applied to the film there are no solvents to be removed so it does not require drying and aeration tunnels to remove them. There are no residual solvents left in the final film. Its use has been widespread in recent decades in the film converters sector. In order to homogenize the adhesive layer with high viscosities, the application system comprises a battery of rollers (7) that transfer the adhesive between them, as shown in Figure 8. The first two are fixed and made of steel. and they go almost in contact with each other, in the area of near contact between the two the adhesive is deposited, the micrometric separation between both rollers is micrometrically glued and the amount of adhesive to deposit depends on that separation measure. The next roller receives the adhesive when in contact with one of the above being made of rubber of various types or similar material. This roller is easily interchangeable, being able to be removable solid or by interchangeable sleeve system that allows the change of the shirt only leaving the steel shaft fixed on the machine. These shirts are exchanged to be able to vary the width of adhesive application, depending on the infinite intermediate widths of film that can be used between the maximum and maximum width that each concrete laminating machine allows depending on its design. This roller is that he transfers the adhesive to the film, aided by a series of rollers that press it.
    The invention is about being able to apply the adhesive in bands, so that areas with and without adhesive of various widths on request can be combined. These areas will have specific measurements depending on the plane of the final film and these in turn depending on the measurements of the final container. It is usual that the film produced by the converter contains several formats together, so that once the lamination process is finished, the film is cut into other machines where it is separated into the individual formats that are served to the packer. Therefore, the width that is worked in the laminator is the sum
    5
    10
    fifteen
    twenty
    25
    of those formats.
    In order to apply the adhesive to bands, we must machine the first rubber roller, which is in contact with the adhesive-giving steel rollers. This is done in machining-grinding machines that work with this type of rubber type materials. The machiner will be given a bounded plan that specifies the exact dimensions of the areas that will pick up adhesive (highlighted areas) and those that will be free of it (lowered areas).
    Therefore, the difference between a conventional lamination and the process described in this invention, is that in the first one homogeneous rollers or sleeves are used in the entire application width and that therefore adhesive will be applied throughout the film. While in this process using machined roller in areas, the adhesive is applied to bands with a total width variability of said bands on demand, depending on the final plane of the film and which in turn depends on the final packaging format and as we have described previously, the area without adhesive will correspond to the main or obverse side of the container once formed.
    In view of this description and set of figures, the person skilled in the art will be able to understand that the embodiments of the invention that have been described can be combined in multiple ways within the object of the invention. The invention has been described according to some preferred embodiments thereof, but it will be apparent to the person skilled in the art that multiple variations can be introduced in said preferred embodiments without exceeding the object of the claimed invention.
    权利要求:
    Claims (13)
    [1]
    5
    10
    fifteen
    twenty
    25
    30
    35
    1. - Procedure for obtaining a sheet for manufacturing flexible packages (1) with at least two internal compartments (2) comprising starting from a base layer having an external face and an internal face, characterized in that it comprises partially adhering to the face internal of the base layer an inner layer, said adhesion being performed only in certain areas of union (3) that are smaller than the total surface of the inner face of the base layer.
    [2]
    2. - Method according to claim 1, wherein the base layer in turn comprises a first layer adhered on its entire surface to a second layer, the inner face of the base layer being on the second layer, on the opposite side of that of union with the first layer.
    [3]
    3. - Method according to any of the preceding claims, wherein the adhesion between layers is carried out by lamination.
    [4]
    4. - Method according to claim 3, wherein the lamination is carried out by extrusion of molten polymer.
    [5]
    5. - Method according to claim 3, wherein the lamination is carried out by means of adhesive.
    [6]
    6. - Method according to any of the preceding claims, wherein the inner layer is heat sealable material on both sides.
    [7]
    7. - Method according to any of the preceding claims, in which the sheet is obtained in coil format (4), so that the areas of union (3) between the base layer and the inner layer are located in the extreme areas (4 ') of the coil (4), while in the central area (4' ') said base and inner layers are not adhered.
    [8]
    8. - Method according to any of the preceding claims, wherein the adhesion of the joining areas (3) between the base layer and the inner layer comprises a lamination with solvent adhesives with a technique selected between flexography and gravure cylinder.
    [9]
    9. - Method according to any of claims 1 to 7, wherein the adhesion of
    5
    10
    fifteen
    twenty
    25
    The joining areas (3) between the base layer and the inner layer comprise a lamination with solvent-free adhesives.
    [10]
    10. - Equipment for obtaining a sheet for manufacturing flexible packages (1) with at least two internal compartments (2) by a method according to claim 8, which comprises a whole engraving roller that transfers an adhesive, dosing the quantity depending on the type of engraving, wherein said engraving roller transfers the adhesive to a roller with an interchangeable jacket (5) of variable width depending on the width of the film to be laminated, where said shirt comprises protrusions and recesses, so that the recesses they are not in contact with the engraving roller and therefore do not take adhesive.
    [11]
    11. - Equipment for obtaining a sheet for manufacturing flexible packages (1) with at least two internal compartments (2) by a method according to claim 8, comprising a single roller engraved in cells (6) that transfers the adhesive with solvents directly to the inner layer.
    [12]
    12. - Equipment for obtaining a sheet for manufacturing flexible packages (1) with at least two internal compartments (2) by a method according to claim 9, comprising specific laminators comprising a battery of rollers (7) that are transferred each other successively a high viscosity adhesive.
    [13]
    13. - Procedure for obtaining a flexible container (1) with at least two internal compartments (2) from a sheet obtained by a method according to any of claims 1 to 9, characterized in that it comprises using a conventional continuous automatic packaging machine .
    类似技术:
    公开号 | 公开日 | 专利标题
    ES2451624T3|2014-03-28|Flexible packing structure with an integrated repetitive opening and closing system, and manufacturing method
    ES2409173T3|2013-06-25|Packing material
    JP5640519B2|2014-12-17|Method for manufacturing self-supporting container
    BR112013023727B1|2020-12-22|resealable flexible film packaging, laminated to form a resealable flexible film packaging, method for forming a resealable flexible film packaging laminate and apparatus for forming resealable flexible film packaging
    JP4844798B2|2011-12-28|Composite container
    BRPI0718204B1|2018-07-10|PACKAGING OF OPENING REPEATS FOR CRAFTS
    KR20040030137A|2004-04-08|Packaging for disposable soft contact lenses
    JP2006143245A|2006-06-08|Spouting auxiliary member, and bag having spouting part with spouting auxiliary member affixed to spouting part of bag
    JP2007223625A|2007-09-06|Package
    CN101336162A|2008-12-31|Holographic flexible tube laminate for packaging and method of making the same
    TW201328943A|2013-07-16|Sequential artwork design for contact lens packaging
    JP2009249031A|2009-10-29|Package
    ES2565567B1|2016-12-29|Procedure and equipment to obtain a sheet to manufacture flexible packaging
    ES2599277T3|2017-01-31|Packaging container, laminated film material
    JP5636917B2|2014-12-10|Self-supporting bag
    JP2004250041A|2004-09-09|Liquid sachet package
    BR102016012049B1|2022-02-15|Flexible packaging having hidden graphics panel
    KR20190002011U|2019-08-07|A Mask Pack for cosmetic
    KR20190029255A|2019-03-20|A Wrapping Paper for Mask Pack
    CN206172038U|2017-05-17|Packing carton with glue, inhale and jointly seal function
    JP5323045B2|2013-10-23|Composite container
    JP5266306B2|2013-08-21|Composite container
    JP6813273B2|2021-01-13|Packaging structure
    JP5315671B2|2013-10-16|Packaging bag having a concealing layer
    WO2007039899A2|2007-04-12|Flexible vase with integral label and a method for its manufacture
    同族专利:
    公开号 | 公开日
    ES2565567B1|2016-12-29|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2771724A|1953-11-09|1956-11-27|Faultiess Rubber Company|Two-compartment container and method of making such container|
    US3156352A|1962-08-06|1964-11-10|Foremost Dairies Inc|Multi-compartment package|
    US20090208147A1|2002-06-06|2009-08-20|Mark Steele|Multi-compartment flexible package|
    US20090238499A1|2002-06-06|2009-09-24|Mark Steele|Multi-compartment flexible package|
    US20100284630A1|2009-05-06|2010-11-11|La Fuente Brian H|Multiple pocket reclosable disposable plastic bags and methods for making them|
    法律状态:
    2016-12-29| FG2A| Definitive protection|Ref document number: 2565567 Country of ref document: ES Kind code of ref document: B1 Effective date: 20161229 |
    优先权:
    申请号 | 申请日 | 专利标题
    ES201630014A|ES2565567B1|2016-01-12|2016-01-12|Procedure and equipment to obtain a sheet to manufacture flexible packaging|ES201630014A| ES2565567B1|2016-01-12|2016-01-12|Procedure and equipment to obtain a sheet to manufacture flexible packaging|
    [返回顶部]