Laminated body, laminated body set, packaging bag forming sheet, and packaging bag

Abstract

To provide a laminated body having high designability.SOLUTION: A laminated body set, which includes a first transparent sealant layer, a first printing film having a first transparent substrate and a first printing layer, and a second printing film having a second transparent substrate and a second printing layer, arranged in this order, with the first printing layer and the second printing layer positioned so that they overlap in plan view, a first laminated body where at least one of the aforementioned first printing layer and the second printing layer is a non-plate printing layer, a second transparent sealant layer, a third printing film having a third transparent substrate and a third printing film, and a fourth printing film with a fourth transparent substrate and a fourth printing layer are positioned so as to overlap in plan view, in this order, with the third printing layer and the fourth printing layer positioned so that they overlap in plan view, the second laminated body where at least one of the third printing layer and the fourth printing layer is a non-plate printing layer; and the first transparent sealant layer and the second transparent sealant layer being laminated to face each other.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present disclosure relates to a laminate, a laminate set, a sheet for forming a packaging bag, and a packaging bag.

Background Art

[0002] Conventionally, in packaging materials in many product fields such as foods, beverages, pharmaceuticals, and chemicals, a printing layer for providing a product name, a pattern, a manufacturer name, a logo mark, a product description, etc. is generally formed. The printing layer is often formed by a plate printing method such as a gravure printing method or a flexographic printing method. In recent years, methods of forming a printing layer using a printing machine such as an electrophotographic method using toner or an inkjet method have also been proposed. The electrophotographic method and the inkjet method are plate-less printing methods that do not require a plate and can print a wide variety of patterns at once.

[0003] Patent Document 1 discloses a pouch container having, as wall surfaces, at least a first wall surface and a second wall surface disposed opposite to the first wall surface, and having a seal portion where the back surfaces of the respective wall surfaces are joined. The first and second wall surfaces have a base film and a sealant layer provided on the back surface side of the base film. At least one of the first and second wall surfaces has a plate-less printing layer formed between the base film and the sealant layer, and an edge portion of the plate-less printing layer is provided at a position away from the end face of the container.

[0004] Patent Document 2 discloses a method for manufacturing a three-side seal bag in which a master roll of a front film and a back film each printed with a pattern by digital printing is prepared, and the front film and the back film fed out from these two master rolls are combined to perform a three-side seal to form a bag.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

[0006] In recent years, materials such as packaging bags having high design properties have been demanded. In particular, in packaging bags and the like, rich and diverse design properties have been demanded. The main object of the present disclosure is to provide a laminate having high design properties. [Means for Solving the Problems]

[0007] One embodiment of the present disclosure includes a transparent sealant layer that is transparent, a first transparent substrate that is transparent, and a first printed film having a first printed layer disposed on at least one main surface side of the first transparent substrate, a second transparent substrate that is transparent, and a second printed film having a second printed layer disposed on at least one main surface side of the second transparent substrate, in this order. The first printed layer and the second printed layer are arranged so as to overlap in plan view, and at least one of the first printed layer and the second printed layer is a non-plate printing layer, and a laminate is provided.

[0008] Another embodiment of the present disclosure includes a transparent sealant layer that is transparent, a first printed layer, a second printed layer, and a transparent substrate that is transparent, in this order. The first printed layer and the second printed layer are arranged so as to overlap in plan view, and at least one of the first printed layer and the second printed layer is a non-plate printing layer, and a laminate is provided.

[0009] Other embodiments of the present disclosure include a first transparent sealant layer that is transparent, a first printed film having a first transparent substrate that is transparent and a first printed layer disposed on at least one major surface side of the first transparent substrate, a second printed film having a second transparent substrate that is transparent and a second printed layer disposed on at least one major surface side of the second transparent substrate, and the first printed layer and the second printed layer are disposed so as to overlap in plan view, and at least one of the first printed layer and the second printed layer is a plate-less printed layer, a first laminate; a second transparent sealant layer that is transparent, a third printed film having a third transparent substrate that is transparent and a third printed layer disposed on at least one major surface side of the third transparent substrate, a fourth printed film having a fourth transparent substrate that is transparent and a fourth printed layer disposed on at least one major surface side of the fourth transparent substrate, and the third printed layer and the fourth printed layer are disposed so as to overlap in plan view, and at least one of the third printed layer and the fourth printed layer is a plate-less printed layer, a second laminate, and the first laminate and the second laminate are used by being laminated such that the first transparent sealant layer and the second transparent sealant layer face each other, and a laminate set is provided.

[0010] Other embodiments of the present disclosure include a first transparent sealant layer that is transparent, a first printed layer, a second printed layer, and a first transparent substrate that is transparent, in this order, and the first printed layer and the second printed layer are disposed so as to overlap in plan view, and at least one of the first printed layer and the second printed layer is a plate-less printed layer, a third laminate; a second transparent sealant layer that is transparent, a third printed layer, a fourth printed layer, and a second transparent substrate that is transparent, in this order, and the third printed layer and the fourth printed layer are disposed so as to overlap in plan view, and at least one of the third printed layer and the fourth printed layer is a plate-less printed layer, a fourth laminate, and the third laminate and the fourth laminate are used by being laminated such that the first transparent sealant layer and the second transparent sealant layer face each other, and a laminate set is provided.

[0011] Furthermore, another embodiment of the present disclosure is a sheet for forming a packaging bag using the laminate set described above, wherein the first transparent sealant layer and the second transparent sealant layer are the same common sealant layer, the first transparent substrate and the third transparent substrate are the same transparent substrate, which is a first common transparent substrate, the second transparent substrate and the fourth transparent substrate are the same transparent substrate, which is a second common transparent substrate, the first printing layer and the third printing layer are disposed adjacent to each other on the first common transparent substrate, the second printing layer and the fourth printing layer are disposed adjacent to each other on the second common transparent substrate, and the common sealant layer, the first common transparent substrate, and the second common transparent substrate are laminated in this order such that the first printing layer and the second printing layer, and the third printing layer and the fourth printing layer overlap in a plan view, to provide a sheet for forming a packaging bag.

[0012] Another embodiment of the present disclosure is a sheet for forming a packaging bag using the laminate set described above, wherein the first transparent sealant layer and the second transparent sealant layer are the same common sealant layer, the first transparent substrate and the second transparent substrate are the same transparent substrate, which is a common transparent substrate, the first printing layer and the third printing layer, and the second printing layer and the fourth printing layer are disposed adjacent to each other on the common transparent substrate, and the common sealant layer and the common transparent substrate are laminated such that the first printing layer and the second printing layer, and the third printing layer and the fourth printing layer overlap in a plan view, to provide a sheet for forming a packaging bag.

[0013] Another embodiment of the present disclosure is a packaging bag using the laminate set described above, wherein the first laminate and the second laminate are arranged such that the first transparent sealant layer and the second transparent sealant layer face each other, and the first printing layer, the second printing layer, the third printing layer, and the fourth printing layer overlap in a plan view, and the first transparent sealant layer and the second transparent sealant layer at a part of the periphery of the first laminate and the second laminate are heat-sealed, to provide a packaging bag.

[0014] Other embodiments of the present disclosure relate to a packaging bag using the laminate set described above. In the packaging bag, the third laminate and the fourth laminate are arranged such that the first transparent sealant layer and the second transparent sealant layer face each other, and the first printing layer, the second printing layer, the third printing layer, and the fourth printing layer overlap in a plan view. A part of the periphery of the third laminate and the fourth laminate, where the first transparent sealant layer and the second transparent sealant layer are heat-sealed, is provided.

Advantages of the Invention

[0015] The present disclosure can provide a laminate that can obtain a packaging bag or the like that has depth and can change its design depending on the presence or absence of contents.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Modes for Carrying Out the Invention

[0017] Embodiments of the present disclosure will be described below with reference to the drawings and the like. However, the present disclosure can be implemented in many different ways and is not to be construed as limited to the description of the embodiments exemplified below. Also, for the purpose of making the description clearer, the drawings may schematically represent the width, thickness, shape, etc. of each part compared to the actual form, but this is merely an example and does not limit the interpretation of the present disclosure. Further, in this specification and each drawing, elements that are the same as those described above with respect to the previously shown drawings may be given the same reference numerals, and detailed descriptions may be omitted as appropriate.

[0018] In this specification, when expressing the mode of arranging one member on another member, if simply expressed as "on" or "under", unless otherwise specified, it includes both the case of arranging another member directly on or under so as to be in contact with a certain member, and the case of arranging another member above or below a certain member with yet another member interposed therebetween. Also, in this specification, when expressing the mode of arranging one member on the surface of another member, if simply expressed as "on the surface side" or "on the surface", unless otherwise specified, it includes both the case of arranging another member directly on or under so as to be in contact with a certain member, and the case of arranging another member above or below a certain member with yet another member interposed therebetween.

[0019] The inventors of the present invention studied a laminate capable of imparting high design quality to a bag body or the like containing contents. As a result, when the laminate constituting the back side was visually recognized from the laminate constituting the front side in a state where two laminates were stacked, by making the design of the laminate on the back side visible through the laminate on the front side, it became possible to have a design with depth when visually recognized from the front side, and further, it was found that the change in the design could be enjoyed depending on the presence or absence of the contents. In addition, in the plate printing method, since the types of patterns that can be manufactured at one time are limited by the gravure plate and the size of the packaging material, etc., it is difficult to obtain a wide variety of patterns at one time. Therefore, there was a limit to the improvement of designability. On the other hand, according to the present disclosure, by making the plate-less printing layer into a laminate combined with another printing layer, the plate-less printing layer can easily change not only the pattern itself but also the size of the pattern to be printed. Therefore, the alignment accuracy with the already printed film can be improved, and furthermore, compared with the plate printing method, a wide variety of patterns can be obtained. According to the present disclosure, it is possible to provide a laminate capable of forming a bag body or the like having high designability by configuring the laminate on the back side to be visible from the laminate constituting the front side and using a plate-less printing layer in addition thereto. Hereinafter, the laminate, laminate set, sheet for forming a packaging bag, and packaging bag of the present disclosure will be described in detail.

[0020] A. Laminate (First Embodiment) The laminate of the present embodiment has a transparent sealant layer that is transparent, a first transparent base material that is transparent, and a first printing film having a first printing layer disposed on at least one main surface side of the first transparent base material, a second transparent base material that is transparent, and a second printing film having a second printing layer disposed on at least one main surface side of the second transparent base material, in this order, and the first printing layer and the second printing layer are disposed so as to overlap in plan view, and at least one of the first printing layer and the second printing layer is a plate-less printing layer. The laminate of the present embodiment has high designability for the reasons described above by being combined with other laminates using a plate-less printing layer.

[0021] FIG. 1 is a schematic cross-sectional view showing an example of the laminate of the present embodiment. As shown in FIGS. 1(a) and 1(b), the laminate 10 of the present embodiment includes a sealant layer 3, a first printing film F1, and a second printing film F2 in this order. The first printing film F1 includes a first transparent substrate 1 and a first printing layer 11 disposed on at least one main surface side of the first transparent substrate 1. The second printing film F2 includes a second transparent substrate 2 and a second printing layer 12 disposed on at least one main surface side of the second transparent substrate 2. In the present disclosure, at least one of the first printing layer 11 and the second printing layer 12 is a plate-less printing layer (indicated by reference numeral D in the figure). Examples of the printing layer other than the plate-less printing layer include a plate printing layer (indicated by reference numeral G in the figure). In the laminate shown in FIG. 1(a), both the first printing layer 11 and the second printing layer 12 are plate-less printing layers (D). In the laminate shown in FIG. 1(b), the first printing layer 11 is a plate-less printing layer (D), and the second printing layer 12 is a plate printing layer (G).

[0022] 1. First Printing Film and Second Printing Film The first printing film in the present embodiment includes a first transparent substrate and a first printing layer disposed on at least one main surface side of the first transparent substrate. The first printing layer may be disposed on the surface side of the first transparent substrate on the sealant layer side, or may be disposed on the surface side of the first transparent substrate on the second printing film side. The second printing film includes a second transparent substrate and a second printing layer disposed on at least one main surface side of the second transparent substrate. The second printing layer may be disposed on the surface side of the second transparent substrate on the first printing film side, or may be disposed on the surface side of the second transparent substrate opposite to the first printing film side. However, from the viewpoints of scratch resistance and impact resistance, the former is preferable.

[0023] (1) First Printing Layer and Second Printing Layer In this embodiment, at least one of the first printing layer and the second printing layer is a plate-less printing layer. In the laminate shown in Fig. 1(a), both the first printing layer 11 and the second printing layer 12 are plate-less printing layers (D). In the laminate shown in Fig. 1(b), the first printing layer 11 is a plate-less printing layer (D), and the second printing layer 12 is a plate printing layer (G). In this embodiment, it is preferable that at least the first printing layer is a plate-less printing layer. This is because when manufacturing the laminate, the first printing layer is often formed after the second printing layer, and by making the first printing layer a plate-less printing layer, it is easier to obtain the effect of improving the alignment accuracy.

[0024] a) Plate-less printing layer and plate printing layer The plate-less printing layer is formed by a plate-less printing method that does not require a plate, such as an electrophotographic method or an inkjet method. The plate-less printing layer contains, for example, toner containing a coloring material or the like. The color (hue, lightness, chroma) of the plate-less printing layer can be arbitrarily set according to the design of characters, patterns, etc. Examples of colored colors include red, orange-red, yellow, yellow-green, green, blue-green, blue, purple-blue, purple, red-purple, etc. The color of the plate-less printing layer may be achromatic colors such as white, black, and gray. The coloring material contained in the toner is not particularly limited. For example, it contains cyan pigment, magenta pigment, yellow pigment, and black pigment. The plate-less printing layer formed by the electrophotographic method using toner can confirm dots caused by the toner particles constituting the printing layer by microscopic observation. The plate-less printing layer forms characters, patterns, etc. by, for example, one printing layer containing one type of toner or by combining two or more printing layers containing different toners. When printing by the inkjet method, instead of toner, liquid ink (aqueous ink for inkjet or UV ink) used in an inkjet printer can be used as printing ink. Dots caused by ink droplets can be confirmed in the plate-less printing layer formed by the inkjet method. These dots are generally smaller than the dots caused by the unevenness of the plate of the plate printing layer.

[0025] The plate printing layer is formed by a conventionally known plate printing method such as gravure printing, flexographic printing, letterpress rotary printing, screen printing, etc. The plate printing method is a printing method that uses a plate prepared according to the formation pattern of the printing layer. The printing method applied to the formation of the plate printing layer is preferably gravure printing or flexographic printing, and particularly preferably gravure printing. In the plate printing layer, for example, traces of the uneven pattern of the plate remain.

[0026] The plate printing layer contains, for example, a coloring material and a binder resin, and may also contain various additives. The plate printing layer can be formed using a conventionally known oil-based ink (solvent-based ink) or water-based ink. These inks contain, for example, a coloring material, a binder resin, optional additives, and a solvent or dispersion medium (hereinafter referred to as a solvent, etc.), and are those in which the binder resin and the coloring material are dissolved or dispersed in the solvent, etc. The solvent, etc. is not particularly limited as long as it can dissolve or disperse the binder resin, etc.

[0027] The color (hue, lightness, chroma) of the plate printing layer can be arbitrarily set according to the design such as characters and patterns. For example, red, orange-red, yellow, yellow-green, green, blue-green, blue, purple-blue, purple, red-purple, metallic colors (silver, gold, etc.), pearl colors, etc. can be mentioned. The color of the plate printing layer may be white, black, or gray (achromatic color). The plate printing layer forms characters, patterns, etc. by, for example, one printing layer containing one type of coloring material or by combining two or more printing layers containing different coloring materials. In the plate printing layer, generally, by using various special inks, color reproduction and stability that are impossible in the plate-less printing layer may be obtained. Also, by using a transparent ink, unevenness in the ink volume in the printing surface can be suppressed.

[0028] b) Regarding the design In the present disclosure, the first printing layer and the second printing layer are printing layers for displaying patterns, product names, manufacturer names, logo marks, product descriptions, etc., and are formed in an arbitrary pattern according to the pattern and characters.

[0029] When the above-mentioned first printing layer and second printing layer are used to laminate two laminates to form, for example, a bag or the like, their configurations will be different depending on whether they are the laminate constituting the front side or the laminate constituting the back side. For example, in the laminate constituting the front side, the above-mentioned first printing layer and the above-mentioned second printing layer are such that their design characteristics are exhibited by laminating these printing layers.

[0030] Specifically, the above-mentioned first printing layer in the laminate constituting the front side includes characters (such as people, animals and plants, vehicles, machines, etc.), and the above-mentioned second printing layer in the laminate constituting the front side includes characters, product names, logos of products or companies, illustrations, etc.

[0031] In the case of the laminate constituting the front side, even when the above-mentioned first printing layer and the above-mentioned second printing layer are laminated, it is necessary to be configured such that when viewed from the front side, the first printing layer constituting the back side can be visually recognized through the transparent sealant layer of the laminate constituting the back side. For example, the case where the first printing layer and the second printing layer are semi-transparent layers, or the case where there are areas where the first printing layer and the second printing layer are not formed and the laminate constituting the back side can be visually recognized from here can be cited.

[0032] On the other hand, the above-mentioned first printing layer in the laminate constituting the back side is preferably a design that can improve the design characteristics more by combining with the design shown by the laminate constituting the front side. Specifically, designs that are the background of the design shown by the laminate constituting the front side can be cited, for example, background landscape images, hidden messages / codes (which become visible after opening and removing the contents), etc.

[0033] On the other hand, the above-mentioned second printing layer in the laminate constituting the back side is a design that can be accurately confirmed when viewed from the back side. For example, barcodes, explanatory texts regarding products, ingredient labels, warnings, URLs of websites, QR codes (registered trademarks), etc. can be cited.

[0034] The second printing layer in the laminate forming the back surface is preferably not visible when viewed from the front surface side. Specifically, it is preferably concealed by providing a concealment layer described later, or by the first printing layer and the second printing layer of the laminate forming the front surface side, and further by the first printing layer forming the back surface side.

[0035] (2) First transparent substrate and second transparent substrate In the present disclosure, examples of the first transparent substrate and the second transparent substrate include single-layer films or multi-layer films of two or more layers composed of resins such as polyester (polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), polycarbonate (PC), etc.), polyolefin (polyethylene (PE), polypropylene (PP), etc.), polyamide (nylon-6, nylon-66, etc.), polyacrylonitrile (PAN), polyimide (PI), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), polymethyl methacrylate (PMMA), polyethersulfone (PES), ethylene-vinyl alcohol copolymer (EVOH), and polystyrene (PS). Further, single-layer films or multi-layer films of two or more layers composed of composite materials containing the above resins and CaCO3 (calcium carbonate) can be exemplified. Examples of such composite materials include LIMEX (registered trademark) (manufactured by TBM Co., Ltd.) containing calcium carbonate and polypropylene. The first transparent substrate and the second transparent substrate may each be a stretched film or an unstretched film.

[0036] When the transparent substrate is a single-layer film, the thickness of the transparent substrate is, for example, 9 μm or more, preferably 12 μm or more. On the other hand, it is, for example, 300 μm or less, preferably 200 μm or less. When the transparent substrate is a multi-layer film of two or more layers, it has the thickness obtained by stacking a plurality of the single-layer films having the above thickness.

[0037] In the present disclosure, "being transparent" means being transparent in the visible light region. For example, the total light transmittance is preferably 70% or more, more preferably 80% or more, and even more preferably 90% or more. Here, the total light transmittance can be measured in accordance with JIS K7361-1, and for example, it can be measured by a haze meter HM150 manufactured by Murakami Color Technology Laboratory.

[0038] 2. Transparent sealant layer In the present disclosure, the transparent sealant layer is arranged such that when one laminate is bent or two laminates are stacked, the opposing edges can be heat-sealed to bond the edges together. Here, the sealant layer in the present disclosure is transparent. This is because, as described above, when two laminates are stacked to form, for example, a bag body, it is necessary to visually recognize the back laminate from the front laminate. Also, the transparent sealant layer is arranged on the side of the laminate closest to the storage part when making a bag and forming a packaging bag.

[0039] Examples of the material constituting the transparent sealant layer include polyolefin resins such as low-density PE (LDPE), linear low-density PE (LLDPE), medium-density PE (MDPE), high-density PE (HDPE), ethylene-vinyl acetate copolymer, propylene homopolymer, ethylene-propylene block copolymer, and ethylene-propylene random copolymer. One or more of these resins can be used. The transparent sealant layer may be composed of a single layer or multiple layers of two or more layers. The transparent sealant layer is preferably an unstretched film made of the above-mentioned resin in order to suppress shrinkage during heat sealing. For example, the transparent sealant layer is preferably an unstretched polypropylene film (CPP).

[0040] The thickness of the transparent sealant layer is not particularly limited and is usually preferably about 10 to 200 μm.

[0041] 3. Concealing layer In the case of the laminate of the present embodiment, which constitutes the back side as described above, it is preferable that a concealment layer is disposed between the first printing layer and the second printing layer.

[0042] FIG. 2 is a schematic cross-sectional view showing an example in the case where the laminate of the present embodiment includes a concealed area by a concealment layer. The laminate shown in FIG. 2(a) has a concealed area in which a concealment layer 4 is disposed between a first printing layer 11 which is a plate-less printing layer (D) and a second printing layer 12 which is a plate printing layer (G). The laminate shown in FIG. 2(b) has a concealed area in which a concealment layer 4 is disposed between a first printing layer 11 which is a plate-less printing layer (D) and a second printing layer 12 which is a plate-less printing layer (D).

[0043] The concealment layer 4 forms a non-transparent concealed area and can conceal the first printing layer 11 when the laminate is viewed from the side of the second printing film F2. When the laminate is viewed from the side of the transparent sealant layer 3, specifically, when two laminates are laminated to form a bag or the like and viewed from the front side, it is a layer capable of concealing the second printing layer 12. Further, when the laminate is made into a bag to form a packaging bag, since the second printing layer is located on the back side rather than the first printing layer, it preferably serves to display the background color of the second printing layer when observed from the back side of the bag.

[0044] By disposing the concealment layer between the first printing layer and the second printing layer in this way, for example, when observing the laminate from the side of the second printing film, the second printing layer can be visually recognized while suppressing the back copy of the first printing layer, and the visibility of the second printing layer can be further improved. Therefore, it is effective when the second printing layer is required to have high readability (for example, characters and codes related to product information, etc.).

[0045] The concealment layer is not particularly limited as long as it is a layer capable of concealment, and examples thereof include a layer formed using a known ink capable of concealment coloring and a metal layer. In the present disclosure, a layer formed using a known ink capable of concealment coloring is preferable. Such a concealing layer is usually a solid layer, i.e., one formed over the entire surface, but it may be partially formed as long as it can conceal the first printing layer or the second printing layer. Examples of the above ink include colored inks obtained by dissolving (or dispersing) a known colorant (dye or pigment) together with a binder resin in a solvent (or dispersion medium).

[0046] In particular, by printing a white ink layer and a silver ink layer on top of each other using the gravure printing method, it is possible to improve the color development of the black, red, blue, and yellow inks of the second printing layer while enhancing the concealability. Also, a white ink layer, a silver ink layer, and a white ink layer may be printed on top of each other. Furthermore, by removing a part of the white ink layer, the silver color can be made visible, and a gloss can be produced only at the necessary locations. Also, it may be formed by printing a white ink layer by digital printing.

[0047] 4. Others In addition to the transparent sealant layer, the first printing film, and the second printing film, the laminate of the present embodiment can include layers described later at arbitrary positions.

[0048] (1) Adhesive layer The laminate of the present embodiment may have an adhesive layer between the transparent sealant layer and the first printing film, and between the first printing film and the second printing film. The adhesive layer can be formed by a conventionally known adhesive. The adhesive may be any one of a one-component curable type, a two-component curable type, or a non-curable type. When an adhesive having gas barrier properties is used as the adhesive, the gas barrier properties (oxygen barrier properties, water vapor barrier properties) of the packaging material can be further enhanced. Examples of the adhesive having gas barrier properties include an adhesive composition containing a polyester polyol, an isocyanate compound, and a plate-like inorganic compound.

[0049] (2) Transparent film The laminate of the present embodiment may have a transparent film in order to provide thickness. As the transparent film, the same ones as those described above in "1. The first printed film and the second printed film (2) The first transparent substrate and the second transparent substrate" can be used. By having the transparent film, the impact resistance can be improved. The transparent film is preferably disposed between the transparent sealant layer and the first printed film.

[0050] (3) Gas barrier layer The laminate of the present embodiment may have a gas barrier layer. The gas barrier layer blocks the permeation of oxygen, water vapor, etc. between the storage part of the packaging material and the external environment when used as a packaging bag. The gas barrier layer may also impart light-shielding properties that block the permeation of visible light, ultraviolet light, etc. The gas barrier layer may be composed of one layer or may be composed of two or more layers.

[0051] The gas barrier layer can be composed of known materials. The gas barrier layer is preferably disposed between the transparent sealant layer and the first printed film. For example, a configuration can be adopted in which a vapor deposition film or a coating film having gas barrier properties is formed on the surface of the transparent sealant layer.

[0052] (4) Other printed layers The laminate of the present embodiment may have other printed layers other than the first printed layer and the second printed layer. The other printed layer may be a plate printing layer or a plate-less printing layer.

[0053] 5. Applications The laminate of the present embodiment can be used as a sheet for forming a packaging bag. Since it will be described in detail in "D. Sheet for forming a packaging bag" described later, the description here is omitted. In addition to packaging bags, it can also be used as a sheet for manufacturing clear files, roll labels, shrink labels, tack labels, seal labels, etc.

[0054] B. Laminate (Second Embodiment) The second embodiment of the laminate of the present disclosure has, in this order, a transparent sealant layer that is transparent, a first printing layer, a second printing layer, and a transparent base material that is transparent, wherein the first printing layer and the second printing layer are arranged so as to overlap in plan view, and at least one of the first printing layer and the second printing layer is a plate-less printing layer.

[0055] FIG. 3 is a schematic cross-sectional view showing an example of the laminate of the present embodiment. As shown in FIG. 3, the laminate 20 of the present embodiment has, in this order, a transparent sealant layer 3, a first printing layer 11, a second printing layer 12, and a transparent base material 5. In the present embodiment, at least one of the first printing layer 11 and the second printing layer 12 is a plate-less printing layer, and it may have a hidden region in which a hidden layer 4 is arranged between the first printing layer 11 and the second printing layer 12. In the laminate shown in FIG. 3(a), the first printing layer 11 is a plate-less printing layer (D), and the second printing layer 12 is a plate printing layer (G). In the laminate shown in FIG. 3(b), both the first printing layer 11 and the second printing layer 12 are plate-less printing layers (D).

[0056] By combining the plate-less printing layer with another printing layer, the laminate of the present embodiment has high designability for the reasons described above. Further, since the laminate of the present embodiment only needs to have one transparent base material, the manufacturing becomes easier. Also, it is possible to reduce material costs and environmental impact.

[0057] Furthermore, in the present embodiment, a hidden layer may be arranged. The hidden layer is arranged between the first printing layer and the second printing layer, forms a non-transparent hidden region, and can hide the first printing layer 11 when the laminate is viewed from the transparent base material 5 side, and can hide the second printing layer 12 when the laminate is viewed from the transparent sealant layer 3 side.

[0058] For example, when observing the laminate from the transparent substrate side, the second printed layer can be visually recognized while suppressing the back printing of the first printed layer, and the visibility of the second printed layer can be further improved. Therefore, it is effective when a high readability is required for the second printed layer (for example, characters and codes related to product information, etc.).

[0059] The transparent sealant layer can be the same as the "A. Laminate (First Embodiment) 2. Transparent Sealant Layer" described above. Also, the first printed layer and the second printed layer can be the same as the "A. Laminate (First Embodiment) 1. First Printed Film and Second Printed Film (1) First Printed Layer and Second Printed Layer" described above. The transparent substrate can be the same as the "A. Laminate (First Embodiment) 1. First Printed Film and Second Printed Film (2) First Transparent Substrate and Second Transparent Substrate" described above. The concealing layer can be the same as the concealing layer described in the "A. Laminate (First Embodiment) 3. Concealing Layer".

[0060] In addition to the transparent sealant layer, the first printed layer, the second printed layer, the transparent substrate, and the concealing layer, the laminate of the present embodiment can include the layers described in "A. Laminate (First Embodiment) 4. Others" at an arbitrary position.

[0061] The use of the laminate of the present embodiment is the same as that of the "A. Laminate (First Embodiment) 5. Use" described above.

[0062] C. Laminate Set 1. First Embodiment A first embodiment of the laminate set in the present disclosure includes a first transparent sealant layer that is transparent, a first transparent substrate that is transparent, and a first printed film having a first printed layer disposed on at least one main surface side of the first transparent substrate, a second transparent substrate that is transparent, and a second printed film having a second printed layer disposed on at least one main surface side of the second transparent substrate, which are provided in this order. The first printed layer and the second printed layer are arranged so as to overlap in a plan view, and at least one of the first printed layer and the second printed layer is a plate-less printed layer. A first laminate, a second transparent sealant layer that is transparent, a third transparent substrate that is transparent, and a third printed film having a third printed layer disposed on at least one main surface side of the third transparent substrate, a fourth transparent substrate that is transparent, and a fourth printed film having a fourth printed layer disposed on at least one main surface side of the fourth transparent substrate, which are provided in this order. The third printed layer and the fourth printed layer are arranged so as to overlap in a plan view, and at least one of the third printed layer and the fourth printed layer is a plate-less printed layer. A second laminate, and the first laminate and the second laminate are laminated and used such that the first transparent sealant layer and the second transparent sealant layer face each other.

[0063] The laminate set in the present embodiment is a set of laminates in the case where two of the laminates described in the above "A. Laminate (First Embodiment)" are laminated and used as a front-side laminate and a back-side laminate, respectively. That is, the first laminate can be a laminate constituting the front side of the laminate described in the above "A. Laminate (First Embodiment)", and the second laminate can be a laminate constituting the back side of the laminate described in the above "A. Laminate (First Embodiment)".

[0064] Note that the first transparent sealant layer of the first laminate is the same as the transparent sealant layer in the laminate described in the above "A. Laminate (First Embodiment)". Further, the second transparent sealant layer, the third transparent substrate, the third printing layer, the fourth transparent substrate, and the fourth printing layer of the second laminate are the same as the transparent sealant layer, the first transparent substrate, the first printing layer, the second transparent substrate, and the second printing layer in the laminate described in the above "A. Laminate (First Embodiment)".

[0065] Since the descriptions of these respective components are the same as those described in the laminate described in the above "A. Laminate (First Embodiment)", the description here is omitted.

[0066] For such a laminate set, for example, in the case of a packaging bag, the first laminate and the second laminate are prepared, the first transparent sealant layer and the second transparent sealant layer are arranged to face each other, and the bag can be formed by heat-sealing the periphery thereof.

[0067] 2. Second Embodiment The second embodiment of the laminate set in the present disclosure has, in this order, a first transparent sealant layer that is transparent, a first printing layer, a second printing layer, and a first transparent substrate that is transparent, the first printing layer and the second printing layer are arranged so as to overlap in plan view, and at least one of the first printing layer and the second printing layer is a plate-less printing layer, a third laminate, a second transparent sealant layer that is transparent, a third printing layer, a fourth printing layer, and a second transparent substrate that is transparent, the third printing layer and the fourth printing layer are arranged so as to overlap in plan view, and at least one of the third printing layer and the fourth printing layer is a plate-less printing layer, a fourth laminate, and the third laminate and the fourth laminate are laminated and used such that the first transparent sealant layer and the second transparent sealant layer face each other.

[0068] The laminate set in this embodiment is a set of laminates in the case where two of the laminates described in the above "B. Laminate (Second Embodiment)" are laminated and used as a front-side laminate and a back-side laminate, respectively. That is, the third laminate can be the laminate constituting the front side of the laminate described in the above "B. Laminate (Second Embodiment)", and the fourth laminate can be the laminate constituting the back side of the laminate described in the above "B. Laminate (Second Embodiment)".

[0069] Note that the first transparent sealant layer and the first transparent base material of the third laminate are the same as the transparent sealant layer and the transparent base material in the laminate described in the above "B. Laminate (Second Embodiment)". Also, the second transparent sealant layer, the third printing layer, the fourth printing layer, and the second transparent base material of the fourth laminate are the same as the transparent sealant layer, the first printing layer, the second printing layer, and the transparent base material in the laminate described in the above "B. Laminate (Second Embodiment)".

[0070] Since each of these configurations is the same as those described in the laminate described in the above "A. Laminate (First Embodiment)", the description here is omitted.

[0071] Such a laminate set can form a bag body, for example, in the case of a packaging bag body, by preparing the third laminate and the fourth laminate, arranging their first transparent sealant layers and second transparent sealant layers to face each other, and heat-sealing the periphery thereof.

[0072] D. Sheet for forming a packaging bag 1. First Embodiment The sheet for forming a packaging bag in this embodiment is a sheet for forming a packaging bag using the first embodiment of the above-described laminate set, wherein the first transparent sealant layer and the second transparent sealant layer are the same common sealant layer, the first transparent base material and the third transparent base material are the same transparent base material, which is the first common transparent base material, the second transparent base material and the fourth transparent base material are the same transparent base material, which is the second common transparent base material, the first printing layer and the third printing layer are arranged adjacent to each other on the first common transparent base material, the second printing layer and the fourth printing layer are arranged adjacent to each other on the second common transparent base material, and the common sealant layer, the first common transparent base material, and the second common transparent base material are laminated in this order so that the first printing layer and the second printing layer, and the third printing layer and the fourth printing layer overlap in plan view.

[0073] FIG. 7 shows an example of the first embodiment of the sheet for forming a packaging bag. An example of the first embodiment of the sheet for forming a packaging bag in this embodiment is composed of a common sealant layer 3, a first common transparent base material 1 on which a first printing layer (pattern C) and a third printing layer (pattern D) are arranged adjacent to each other, and a second common transparent base material 2 on which a second printing layer (pattern A) and a fourth printing layer (pattern B) are arranged adjacent to each other, which are laminated in this order, and the first printing layer (pattern C) and the second printing layer (pattern A), and the third printing layer (pattern D) and the fourth printing layer (pattern B) are arranged so as to overlap in plan view.

[0074] FIG. 6 is a schematic view showing an example of the sheet for forming a packaging bag in this embodiment and a packaging bag using the same. The sheet 50 for forming a packaging bag shown in FIG. 6(a) has a surface-side laminate 51 and a back-side laminate 52 with a folding planned portion S interposed therebetween. According to this embodiment, the surface-side laminate 51 is the first laminate in the "C. laminate set" having the first printing layer (pattern C) and the second printing layer (pattern A), and the back-side laminate 52 is the second laminate in the "C. laminate set" having the third printing layer (pattern D) and the fourth printing layer (pattern B).

[0075] The sheet 50 for forming the packaging bag is bent at the planned bending part S, overlapped, and the peripheral end part thereof is heat-sealed to form the seal part 103, thereby obtaining the packaging bag 100 having the front surface 101 and the back surface 102 (Fig. 6(b)).

[0076] The manufacturing method of the sheet for forming the packaging bag of the present embodiment is not particularly limited, but for example, it can be manufactured as follows. Fig. 4(a) is a diagram for explaining an example of the manufacturing method of the sheet for forming the packaging bag in the present embodiment.

[0077] First, a second printing layer (pattern A) and a fourth printing layer (pattern B) are formed on the second common transparent base material 2 by plate-less printing (step 1). At this time, it is preferable to attach marks for alignment. According to plate-less printing, a plurality of patterns can be printed while continuously changing. At this time, a concealing layer is formed in an arbitrary area as necessary. Next, an adhesive is applied to the side of the second printing layer (pattern A) 12, and the first common transparent base material 1 is bonded (step 2). On the surface side opposite to the side of the second printing layer (pattern A) 12 of the first common transparent base material 1, a first printing layer (pattern C) and a third printing layer (pattern D) are formed by plate-less printing (step 3). At this time, alignment is performed with the second printing layer and the fourth printing layer using the alignment marks. According to plate-less printing, alignment can be performed with high accuracy, and a plurality of patterns can be printed while continuously changing. Next, an adhesive is applied to the side of the first printing layer (pattern C) 11, and the common sealant layer 3 is bonded (step 4). Thereby, the sheet for forming the packaging bag is obtained.

[0078] Fig. 4(b) is a diagram for explaining another example of the manufacturing method of the sheet for forming the packaging bag in the present embodiment. First, a second printing layer (pattern A) and a fourth printing layer (pattern B) are formed on the second common transparent substrate 2 by plate printing (step 1). At this time, it is preferable to attach marks for alignment. At this time, a concealing layer may be formed in the area of the fourth printing layer (pattern B) that will be the laminate on the back side as needed. Next, an adhesive is applied to the side of the second printing layer (pattern A) 12, and the first common transparent substrate 1 is bonded (step 2). On the side of the first common transparent substrate 1 opposite to the side of the second printing layer (pattern A) 12, a first printing layer (pattern C) and a third printing layer (pattern D) are formed by non-plate printing (step 3). At this time, alignment marks are used to align with the second printing layer (pattern A) and the fourth printing layer (pattern B). According to non-plate printing, alignment can be performed with high precision, and a plurality of patterns can be printed while continuously changing. Next, an adhesive is applied to the side of the first printing layer (pattern C) 11, and the common sealant layer 3 is bonded (step 4). Thereby, a sheet for forming a packaging bag is obtained.

[0079] 2. Second Embodiment The sheet for forming a packaging bag in this embodiment is a sheet for forming a packaging bag using the second embodiment of the above-described laminate set, wherein the first transparent sealant layer and the second transparent sealant layer are the same common sealant layer, the first transparent substrate and the second transparent substrate are the same transparent substrate, which is a common transparent substrate, the first printing layer and the third printing layer, and the second printing layer and the fourth printing layer are arranged adjacent to each other on the common transparent substrate, and the common sealant layer and the common transparent substrate are laminated so that the first printing layer and the second printing layer, and the third printing layer and the fourth printing layer overlap in plan view.

[0080] FIG. 5 is a diagram for explaining an example of a method for manufacturing the sheet for forming a packaging bag of this embodiment. First, a second printing layer (pattern A) and a fourth printing layer (pattern B) are formed on a common transparent substrate 5 by plate printing (or non-plate printing) (step 1). At this time, it is preferable to attach marks for alignment. Also, a concealing layer may be formed in the area of the fourth printing layer (pattern B) that becomes the laminate on the back side. Next, a first printing layer (pattern C) and a third printing layer (pattern D) are formed on the side of the second printing layer (pattern A) 12 by non-plate printing (step 2). At this time, alignment with the second printing layer (pattern A) and the fourth printing layer (pattern B) is performed using the alignment marks. According to non-plate printing, alignment can be achieved with high precision, and printing can be performed while continuously changing a plurality of patterns. Next, an adhesive is applied to the side of the first printing layer (pattern C) 11, and the common sealant layer 3 is bonded (step 3). Thereby, a sheet for forming a packaging bag is obtained.

[0081] The sheet for forming a packaging bag of the present embodiment can be formed by an example of the manufacturing method described above, and the common sealant layer 3, the second printing layer (pattern A) and the fourth printing layer (pattern B) are arranged adjacent to each other on the common transparent substrate 5, and further, the first printing layer (pattern C) and the third printing layer (pattern D) are arranged by laminating on their respective printing layers, and the first printing layer (pattern C) and the second printing layer (pattern A), and the third printing layer (pattern D) and the fourth printing layer (pattern B) are arranged so as to overlap in plan view.

[0082] Regarding other points of the present embodiment, since they are the same as those of the first embodiment described above, the description here is omitted.

[0083] E. Packaging Bag 1. First Embodiment The packaging bag of this embodiment is a packaging bag using the first embodiment of the above-described laminate set. The first laminate and the second laminate are arranged such that the first transparent sealant layer and the second transparent sealant layer face each other, and the first printing layer, the second printing layer, the third printing layer, and the fourth printing layer overlap in a plan view. The first transparent sealant layer and the second transparent sealant layer in a part of the periphery of the first laminate and the second laminate are heat-sealed.

[0084] FIG. 6(b) is a schematic view showing an example of the packaging bag of this embodiment. The packaging bag 100 of this embodiment includes a front surface 101 and a back surface 102 formed by bending the above-described first laminate and second laminate so that the sealant layer is on the inside, a storage portion O capable of storing contents, and a seal portion 103 formed around the storage portion and having opposing sealant layers sealed to each other. The shape of the packaging bag of the present disclosure is not limited to the three-side seal bag shown in FIG. 6(b), and examples include a pillow bag, a gusset bag, a stand pouch, and the like.

[0085] When observing the packaging bag of this embodiment from the front side of the bag, a pattern formed by overlapping the patterns of the first printing layer and the second printing layer included on the bag surface can be seen. Furthermore, the contents can be observed through the bag surface. When the contents are removed, it is further possible to visually recognize the third printing layer on the back surface of the bag. By visually recognizing the third printing layer simultaneously in addition to the first printing layer and the second printing layer, the design can be made more profound, and new design effects such as using the third printing layer as a background can be imparted.

[0086] Also, when the back surface of the packaging bag has the above-described concealment layer, when observing from the back side of the bag, the fourth printing layer on the back surface of the bag can be surely visually recognized, and the visibility of important information such as a barcode can be further improved.

[0087] For the packaging bag of the present embodiment, more variations of patterns can be provided depending on the types of patterns on the front and back surfaces and the combination method of the front and back. For example, by opening the package and taking out the contents, a design can be made such that the hidden inner pattern can be seen. In this case, it is possible to provide the fun of not knowing what pattern (character, landscape, illustration, person, etc.) is hidden until purchase and opening. In addition, it can be utilized for printing a proof of purchase that is preferably hidden until opened, such as a serial code. Furthermore, when viewed from the front side, a design with a sense of depth and three-dimensionality can be achieved in which the first printing layer and the second printing layer included in the front surface and the third printing layer included in the back surface overlap. Furthermore, a design that combines the patterns of the printing layers on the inner sides of the front and back surfaces and the contents is also possible.

[0088] 2. Second Embodiment The packaging bag of the present embodiment is a packaging bag using the second embodiment of the above-described laminate set, in which the third laminate and the fourth laminate are arranged such that the first transparent sealant layer and the second transparent sealant layer face each other and the first printing layer, the second printing layer, the third printing layer, and the fourth printing layer overlap in plan view, and the first transparent sealant layer and the second transparent sealant layer in a part of the periphery of the third laminate and the fourth laminate are heat-sealed.

[0089] Regarding the packaging bag of the present embodiment, since it overlaps with the description of the packaging bag of the first embodiment, the description here is omitted.

[0090] Note that the present disclosure is not limited to the above embodiments. The above embodiments are examples, and any configuration that has substantially the same configuration as the technical idea described in the claims of the present disclosure and exhibits the same operational effects is included in the technical scope of the present disclosure.

Examples

[0091] Examples are shown below to explain the present disclosure in more detail. (Example 1) As shown in Fig. 4(a), a polyester (PET) film was prepared as the second common transparent substrate 2. A second printing layer (pattern A) and a fourth printing layer (pattern B) were formed adjacent to each other on one surface of the polyester (PET) film by digital printing. At this time, a plurality of patterns were printed while continuously changing. Also, marks for alignment were made. The polyester (PET) film becomes the outermost layer of the flexible packaging material. An adhesive was applied to the surface on the printing layer side of the polyester (PET) film on which the second printing layer (pattern A) and the fourth printing layer (pattern B) were formed, and another PET film (the first common transparent substrate) was laminated. On the surface side of the first common transparent substrate opposite to the side of the second printing layer and the fourth printing layer, a first printing layer (pattern C) and a third printing layer (pattern D) were formed by digital printing. At this time, a plurality of patterns were printed while continuously changing. Also, alignment was performed with the patterns of the second printing layer (pattern A) and the fourth printing layer (pattern B) using alignment marks.

[0092] An adhesive was applied to the surface on the first printing layer side of the polyester (PET) film on which the first printing layer (pattern C) and the third printing layer (pattern D) were formed, and a polyethylene film (common sealant layer 3) was laminated. The polyethylene film becomes the innermost layer of the flexible packaging material. Thereby, a sheet for forming a packaging bag made of a laminate was obtained.

[0093] The above sheet for forming a packaging bag was processed by a three-side seal bag-making machine to form a bag shape. The above bag was filled with contents by a filling machine, and one open side was sealed to close, obtaining a package.

[0094] (Example 2) As shown in Fig. 4(b), a polyester (PET) film was prepared as the second common transparent substrate 2. A second printing layer (pattern A) and a fourth printing layer (pattern B) were formed on one surface of the polyester (PET) film by gravure printing. Also, marks for alignment were made. The polyester (PET) film becomes the outermost layer of the flexible packaging material. An adhesive was applied to the surface on the printing layer side of the polyester (PET) film on which the second printing layer (pattern A) and the fourth printing layer (pattern B) were formed, and another PET film (the first common transparent substrate 1) was laminated. A first printing layer (pattern C) and a third printing layer (pattern D) were formed by digital printing on the surface side of the first common transparent substrate opposite to the adhesive layer. At this time, a plurality of patterns were printed while continuously changing. Also, alignment was performed with the patterns of the second printing layer (pattern A) and the fourth printing layer (pattern B) using the alignment marks.

[0095] An adhesive was applied to the surface on the printing layer side of the polyester (PET) film on which the first printing layer (pattern C) and the third printing layer (pattern D) were formed, and a polyethylene film (common sealant layer 3) was laminated. The polyethylene film becomes the innermost layer of the flexible packaging material. Thereby, a sheet for forming a packaging bag made of a laminate was obtained.

[0096] The above sheet for forming a packaging bag was processed by a three-side seal bag-making machine into the shape of a bag. The above bag was filled with contents by a filling machine, and one open side was sealed to close, obtaining a package.

[0097] (Example 3) As shown in Fig. 5, a polyester (PET) film was prepared as the common transparent substrate 5. A second printing layer (pattern A) and a fourth printing layer (pattern B) were formed on one surface of the polyester (PET) film by gravure printing. Also, marks for alignment were made. The polyester (PET) film becomes the outermost layer of the flexible packaging material. On the surface of the polyester (PET) film with the second printing layer (pattern A) and the fourth printing layer (pattern B) formed thereon, a first printing layer (pattern C) and a third printing layer (pattern D) were formed by digital printing. At this time, a plurality of patterns were printed while continuously changing. Also, alignment was performed with the patterns of the second printing layer (pattern A) and the fourth printing layer (pattern B) using the alignment marks.

[0098] An adhesive was applied to the surface on the side of the first printing layer (pattern C) and the third printing layer (pattern D), and a non-stretched polypropylene (CPP) film (common sealant layer 3) was laminated. The non-stretched polypropylene (CPP) film becomes the innermost layer of the flexible packaging material. Thereby, a sheet for forming a packaging bag made of a laminate was obtained.

[0099] The above sheet for forming a packaging bag was processed by a three-side seal bag-making machine to form a bag shape. The above bag was filled with contents by a filling machine, and one open side was sealed and closed to obtain a package.

Explanation of Reference Numerals

[0100] 1 … First common transparent substrate 2 … Second common transparent substrate 3 … Common sealant layer 4 … Concealing layer 5 … Transparent substrate 11… First printing layer 12… Second printing layer 10… Laminate (First Embodiment) 20… Laminate (Second Embodiment) 50… Sheet for forming a packaging bag 100… Packaging bag

Claims

1. a first transparent sealant layer that is transparent; a first printed film having a transparent first transparent substrate and a first printed layer disposed on at least one main surface side of the first transparent substrate; A second transparent substrate that is transparent, and a second printed film that has a second printed layer disposed on at least one main surface side of the second transparent substrate, in this order; the first printed layer and the second printed layer are arranged so as to overlap in a plan view, When the second printed film is viewed from the first printed film side, the design shown on the second printed film can be seen through the first printed film, When the first printed film is viewed from the second printed film side, the design shown on the first printed film can be seen through the second printed film, a first laminate, in which at least one of the first printing layer and the second printing layer is a plateless printing layer; a second transparent sealant layer that is transparent; and a third printed film having a transparent third transparent substrate and a third printed layer disposed on at least one main surface side of the third transparent substrate; a fourth transparent substrate that is transparent, and a fourth printed film that has a fourth printed layer disposed on at least one main surface side of the fourth transparent substrate, in this order; the third printed layer and the fourth printed layer are arranged so as to overlap each other in a plan view, When the fourth printed film is viewed from the third printed film side, the design shown on the fourth printed film is visible through the third printed film, When the third printed film is viewed from the fourth printed film side, the design shown on the third printed film is visible through the fourth printed film, a second laminate, in which at least one of the third printing layer and the fourth printing layer is a plateless printing layer; and A laminate set, wherein the first laminate and the second laminate are laminated together so that the first transparent sealant layer and the second transparent sealant layer face each other.

2. 2. The laminate set of claim 1, further comprising a concealing layer between the third printing layer and the fourth printing layer, and the shielding region in which the shielding layer is disposed is arranged so as to shield a portion of the fourth printing layer when viewed in a plane from the third printing layer side, and is arranged so as to shield a portion of the third printing layer when viewed in a plane from the fourth printing layer side.

3. The film has a transparent first transparent sealant layer, a first printed layer, a second printed layer, and a transparent first transparent substrate, in this order; the first printed layer and the second printed layer are arranged so as to overlap in a plan view, When the second printed layer is viewed from the first printed layer side, the design shown on the second printed layer is visible; When the first printed layer is viewed from the second printed layer side, the design shown on the first printed layer can be seen; a third laminate, in which at least one of the first printing layer and the second printing layer is a plateless printing layer; A transparent second transparent sealant layer, a third printed layer, a fourth printed layer, and a transparent second transparent substrate, in this order; the third printed layer and the fourth printed layer are arranged so as to overlap each other in a plan view, When the fourth printed layer is viewed from the third printed layer side, the design shown on the fourth printed layer can be seen; When the third printed layer is viewed from the fourth printed layer side, the design shown on the third printed layer can be seen; a fourth laminate, in which at least one of the third printing layer and the fourth printing layer is a plateless printing layer; and A laminate set, wherein the third laminate and the fourth laminate are used by being laminated so that the first transparent sealant layer and the second transparent sealant layer face each other.

4. 4. The laminate set of claim 3, further comprising a concealing layer between the third printing layer and the fourth printing layer, and the shielding region in which the shielding layer is disposed is arranged so as to shield a portion of the fourth printing layer when viewed in a plane from the third printing layer side, and is arranged so as to shield a portion of the third printing layer when viewed in a plane from the fourth printing layer side.

5. A sheet for forming a packaging bag using the laminate set according to claim 1, the first transparent sealant layer and the second transparent sealant layer are the same common sealant layer; a first common transparent substrate, in which the first transparent substrate and the third transparent substrate are the same transparent substrate; a second common transparent substrate, in which the second transparent substrate and the fourth transparent substrate are the same transparent substrate; the first printed layer and the third printed layer are disposed adjacent to each other on the first common transparent substrate; the second printed layer and the fourth printed layer are disposed adjacent to each other on the second common transparent substrate; A sheet for forming a packaging bag, in which the common sealant layer, the first common transparent substrate, and the second common transparent substrate are laminated in this order so that the first printed layer and the second printed layer, and the third printed layer and the fourth printed layer overlap in a planar view.

6. 6. The packaging bag forming sheet according to claim 5, further comprising a concealing layer between the third printing layer and the fourth printing layer, and the shielding region in which the shielding layer is disposed is arranged so as to shield a portion of the fourth printing layer when viewed in a plane from the third printing layer side, and is arranged so as to shield a portion of the third printing layer when viewed in a plane from the fourth printing layer side.

7. A sheet for forming a packaging bag using the laminate set according to claim 3, the first transparent sealant layer and the second transparent sealant layer are the same common sealant layer; the first transparent substrate and the second transparent substrate are the same transparent substrate; the first printed layer and the third printed layer, and the second printed layer and the fourth printed layer are disposed adjacent to each other on the common transparent substrate; A sheet for forming a packaging bag, in which the common sealant layer and the common transparent substrate are laminated so that the first printed layer and the second printed layer, and the third printed layer and the fourth printed layer overlap in a planar view.

8. 8. The packaging bag forming sheet according to claim 7, further comprising a concealing layer between the third printing layer and the fourth printing layer, and the shielding region in which the shielding layer is disposed is arranged so as to shield a portion of the fourth printing layer when viewed in a plane from the third printing layer side, and is arranged so as to shield a portion of the third printing layer when viewed in a plane from the fourth printing layer side.

9. A packaging bag using the laminate set according to claim 1, the first laminate and the second laminate are arranged so that the first transparent sealant layer and the second transparent sealant layer face each other, and the first printed layer, the second printed layer, the third printed layer, and the fourth printed layer overlap each other in a planar view; A packaging bag, wherein the first transparent sealant layer and the second transparent sealant layer are heat-sealed at portions of the periphery of the first laminate and the second laminate.

10. 10. The packaging bag of claim 9, further comprising a concealing layer between the third printing layer and the fourth printing layer, wherein the shielding region in which the shielding layer is disposed is arranged to shield a portion of the fourth printing layer when viewed in a plane from the third printing layer side, and is arranged to shield a portion of the third printing layer when viewed in a plane from the fourth printing layer side.

11. A packaging body as described in claim 9 or claim 10, wherein the design shown on the third printing layer is configured to be visible when viewed from the side of the first printing layer.

12. A packaging bag using the laminate set according to claim 3, the third laminate and the fourth laminate are arranged so that the first transparent sealant layer and the second transparent sealant layer face each other, and the first printed layer, the second printed layer, the third printed layer, and the fourth printed layer overlap each other in a planar view; A packaging bag, wherein the first transparent sealant layer and the second transparent sealant layer are heat-sealed at portions of the periphery of the third laminate and the fourth laminate.

13. A packaging bag as described in claim 11, which has a concealing layer between the third printing layer and the fourth printing layer, and the shielding area in which the shielding layer is arranged is arranged to shield a portion of the fourth printing layer when viewed in a plane from the third printing layer side, and is arranged to shield a portion of the third printing layer when viewed in a plane from the fourth printing layer side.

14. A packaging body as described in claim 12 or claim 13, wherein the design shown on the third printing layer is configured to be visible when viewed from the side of the first printing layer.

Images