JP2022168961A - Laminate, laminate set, packaging bag formation sheet and packaging bag - Google Patents

Abstract

To provide a laminate having high design ability.SOLUTION: A laminate includes: a transparent sealant layer 3 being transparent; a first print film F1 having a first transparent substrate 1 being transparent and a first print layer 11 arranged at least on one principal surface side of the first transparent substrate; and a second print film F2 having a second transparent substrate 2 being transparent and a second print layer 12 arranged at least on one principal surface side of the second transparent substrate, in this order. The first print layer and the second print layer are arranged to overlap in a plane view. At least one of the first print layer and the second print layer is a plateless print layer.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present disclosure relates to a laminate, a laminate set, a sheet for forming a packaging bag, and a packaging bag.

Conventionally, packaging materials for many product fields such as food, beverages, pharmaceuticals, and chemicals generally have printed layers for providing product names, patterns, manufacturer names, logo marks, product descriptions, etc. It is The printed layer is often formed by plate printing methods such as gravure printing and flexographic printing. In recent years, a method of forming a printed layer using a printing machine such as an electrophotographic system using toner or an inkjet system has also been proposed. The electrophotographic method and the inkjet method are plateless printing methods that do not require a plate, and can print a wide variety of patterns at once.

Patent Literature 1 discloses that a wall surface portion includes at least a first wall surface portion and a second wall surface portion opposed to the first wall surface portion, and has a seal portion in which back surfaces of the wall surface portions are joined to each other. The pouch container, wherein the first and second wall surface portions have a base film and a sealant layer provided on the back side of the base film, and at least one of the first and second wall surface portions The first is a pouch container having a plateless printing layer formed between the base film and the sealant layer, and the edge of the plateless printing layer is provided at a position away from the end surface of the container. It is

In Patent Document 2, original rolls of a front film and a back film on which patterns are respectively printed by digital printing are prepared, and both the front film and the back film fed out from these two original rolls are put together to form a three-sided seal. A method for making a three-sided seal bag is disclosed.

WO2017/047167 JP 2018-12250 A

BACKGROUND ART In recent years, there has been a demand for materials for packaging bags and the like having high designability. A main object of the present disclosure is to provide a laminate having a high designability.

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 layer disposed on at least one main surface side of the first transparent substrate. 1 printed film, 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, Providing a laminate in which the first printed layer and the second printed layer are arranged to overlap each other in plan view, and at least one of the first printed layer and the second printed layer is a plateless printed layer. .

Another embodiment of the present disclosure has 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, and the first printed layer and the A laminate is provided in which second printed layers are arranged so as to overlap each other in plan view, and at least one of the first printed layer and the second printed layer is a plateless printed layer.

Another embodiment of the present disclosure is a first transparent sealant layer that is transparent, a first transparent substrate that is transparent, and a first printing 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 wherein 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 plateless printed layer; A third printing having a laminate, a second transparent sealant layer that is transparent, a third transparent substrate that is transparent, and a third printing layer disposed on at least one main surface side of the third transparent substrate. a film, 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 in this order; a second laminate in which three printed layers and the fourth printed layer are arranged to overlap in plan view, and at least one of the third printed layer and the fourth printed layer is a plateless printed layer; and wherein the first laminate and the second laminate are laminated so that the first transparent sealant layer and the second transparent sealant layer are opposed to each other.

Another embodiment of the present disclosure has 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 a third laminate in which the printed layer and the second printed layer are arranged to overlap each other in plan view, and at least one of the first printed layer and the second printed layer is a plateless printed layer; and a transparent third laminate. A second transparent sealant layer, a third printed layer, a fourth printed layer, and a transparent second transparent substrate are provided in this order, and the third printed layer and the fourth printed layer are arranged in plan view. a fourth laminated body arranged to overlap, wherein at least one of the third printed layer and the fourth printed layer is a plateless printed layer, the third laminated body and the fourth laminated body provides a laminate set in which the first transparent sealant layer and the second transparent sealant layer are laminated so as to face each other.

Furthermore, another embodiment of the present disclosure is a packaging bag forming sheet 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 common transparent base material is the same transparent base material as the first transparent base material and the third transparent base material, and the second transparent base material and the fourth transparent base material are the same transparent base material; a second common transparent substrate, wherein the first printed layer and the third printed layer are arranged adjacent to each other on the first common transparent substrate, and the second printed layer and the fourth The printed layers are arranged adjacent to each other on the second common transparent substrate such that the first printed layer, the second printed layer, and the third printed layer and the fourth printed layer overlap in plan view. , the common sealant layer, the first common transparent substrate, and the second common transparent substrate are laminated in this order.

Another embodiment of the present disclosure is a packaging bag forming sheet using the laminate set described above, wherein the first transparent sealant layer and the second transparent sealant layer are the same common sealant layer, and A common transparent substrate in which 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 The printed layers are arranged adjacent to each other on the common transparent substrate, and the first printed layer and the second printed layer, and the third printed layer and the fourth printed layer overlap in plan view. Provided is a sheet for forming a packaging bag, in which a common sealant layer and the common transparent substrate are laminated.

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 the first transparent sealant layer and the second transparent sealant layer are opposed to each other, and the first printed layer, the second printed layer, the third printed layer, and the fourth printed layer are arranged so as to overlap in plan view, and the first laminate and the second laminate A packaging bag, wherein the first transparent sealant layer and the second transparent sealant layer are heat-sealed on a part of the perimeter of the bag.

Another embodiment of the present disclosure is a packaging bag using the laminate set described above, wherein the third laminate and the fourth laminate are the first transparent sealant layer and the second transparent sealant layer are opposed to each other, and the first printed layer, the second printed layer, the third printed layer, and the fourth printed layer are arranged so as to overlap in plan view, and the third laminate and the fourth laminate A packaging bag, wherein the first transparent sealant layer and the second transparent sealant layer are heat-sealed on a part of the perimeter of the bag.

Advantageous Effects of Invention The present disclosure has an effect of being able to provide a layered product that can obtain a packaging bag or the like that has depth and whose design can be changed depending on the presence or absence of contents.

1 is a schematic cross-sectional view showing an example of a laminate according to a first embodiment of the present disclosure; FIG. 1 is a schematic cross-sectional view showing an example of a laminate according to a first embodiment of the present disclosure; FIG. FIG. 4 is a schematic cross-sectional view showing an example of a laminate according to a second embodiment of the present disclosure; It is a figure explaining an example of the manufacturing method of the sheet for packaging bag formation of a 1st embodiment of this indication. It is a figure explaining an example of the manufacturing method of the sheet for packaging bag formation of a 2nd embodiment of this indication. BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic which shows an example of the sheet for packaging bag formation of this indication, and a packaging bag using the same. It is a figure explaining an example of the sheet for packaging bag formation of a 1st embodiment of this indication.

Embodiments of the present disclosure will be described below with reference to the drawings and the like. However, the present disclosure can be embodied in many different modes and should not be construed as limited to the description of the embodiments exemplified below. In addition, in order to make the description clearer, the drawings may schematically show the width, thickness, shape, etc. of each part compared to the actual form, but this is only an example and limits the interpretation of the present disclosure. not something to do. In addition, in this specification and each figure, the same reference numerals may be given to the same elements as those described above with respect to the existing figures, and detailed description thereof may be omitted as appropriate.

In this specification, when expressing a mode of arranging another member on top of a certain member, when simply describing “above” or “below”, unless otherwise specified, 2 includes both cases in which another member is arranged directly above or directly below, and cases in which another member is arranged above or below a certain member via another member. In addition, in this specification, when expressing a mode in which another member is arranged on the surface of a certain member, when simply describing “on the surface side” or “on the surface”, unless otherwise specified, It includes both the case of arranging another member directly above or directly below so as to be in contact with it, and the case of arranging another member above or below a certain member via another member.

The present inventors have studied a laminate that can give a high design property to a bag or the like containing contents, and found that when two laminates are stacked, the laminate constituting the front side It is possible to create a design that has depth when viewed from the front side by making the design of the back side laminate visible through the front side laminate when the laminate constituting the back side is viewed from the front. Furthermore, we found that the design can be changed depending on the presence or absence of the contents.
In addition, in the plate printing method, the types of patterns that can be produced at one time are limited by the size of the gravure plate and the packaging material, etc., so it is difficult to obtain a wide variety of patterns at one time. Therefore, there is a limit to the improvement in designability. On the other hand, according to the present disclosure, by forming a laminate in which the plateless printing layer is combined with another printing layer, the plateless printing layer can easily change not only the pattern itself but also the size of the pattern to be printed. Therefore, it is possible to improve the accuracy of alignment with the already printed film, and furthermore, it is possible to obtain a wide variety of patterns compared to the plate printing method.
According to the present disclosure, a bag or the like having a high designability is provided by configuring the laminate constituting the back side so that the laminate constituting the back side can be visually recognized from the laminate constituting the front side, and by using a plateless printing layer in addition to this. A configurable laminate is provided.
Hereinafter, the laminate, the laminate set, the packaging bag forming sheet, and the packaging bag of the present disclosure will be described in detail.

A. Laminate (first embodiment)
The laminate of this embodiment includes a transparent transparent sealant layer, a transparent first transparent substrate, and a first printed layer disposed on at least one main surface side of the first transparent substrate. 1 printed film, 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 each other in plan view, and at least one of the first printed layer and the second printed layer is a plateless printed layer. The laminate of the present embodiment, when combined with another laminate using a non-plate-printing layer, has high designability for the reasons described above.

FIG. 1 is a schematic cross-sectional view showing an example of the laminate of this embodiment. As shown in FIGS. 1A and 1B, the laminate 10 of this embodiment has a sealant layer 3, a first printed film F1, and a second printed film F2 in this order. The first printed film F1 has a first transparent substrate 1 and a first printed layer 11 arranged on at least one main surface side of the first transparent substrate 1 . The second printed film F2 has a second transparent base material 2 and a second printed layer 12 arranged on at least one main surface side of the second transparent base material 2 . The present disclosure is characterized in that at least one of the first printed layer 11 and the second printed layer 12 is a plateless printed layer (indicated by symbol D in the figure). Printed layers other than the plateless printed layer include a plated printed layer (indicated by symbol G in the figure). In the laminate shown in FIG. 1(a), both the first printed layer 11 and the second printed layer 12 are plateless printed layers (D). In the laminate shown in FIG. 1(b), the first printed layer 11 is a plateless printed layer (D), and the second printed layer 12 is a plated printed layer (G).

1. First printed film and second printed film The first printed film in this embodiment has a first transparent substrate and a first printed layer arranged on at least one main surface side of the first transparent substrate. . The first printed layer may be arranged on the surface of the first transparent substrate facing the transparent sealant layer, or may be arranged on the surface of the first transparent substrate facing the second printed film.
The second printed film has a second transparent substrate and a second printed layer disposed on at least one major surface side of the second transparent substrate. The second printed layer may be arranged on the surface of the second transparent substrate facing the first printed film, and arranged on the surface of the second transparent substrate opposite to the first printed film. However, from the viewpoint of scratch resistance and impact resistance, the former is preferable.

(1) First Printed Layer and Second Printed Layer In the present embodiment, at least one of the first printed layer and the second printed layer is a plateless printed layer. In the laminate shown in FIG. 1(a), both the first printed layer 11 and the second printed layer 12 are plateless printed layers (D). In the laminate shown in FIG. 1(b), the first printed layer 11 is a plateless printed layer (D), and the second printed layer 12 is a plated printed layer (G). In this embodiment, at least the first printing layer is preferably a plateless printing layer. When manufacturing a laminate, the first printed layer is often formed after forming the second printed layer, and by making the first printed layer a plateless printed layer, the effect of improving the alignment accuracy can be obtained. because it is easy.

a) Plateless Printing Layer and Plateless Printing Layer The plateless printing layer is formed by a plateless printing method that does not require a plate, such as an electrophotographic method or an inkjet method.
The plateless printing layer contains toner containing, for example, a coloring material. The color (hue, brightness, saturation) of the plateless printing layer can be set arbitrarily according to the design of characters and patterns. Chromatic colors such as purple and reddish purple are included. The color of the plateless printing layer may be an achromatic color such as white, black, or gray.
Coloring materials contained in the toner are not particularly limited, and include, for example, cyan pigments, magenta pigments, yellow pigments, and black pigments. In a plateless printing layer formed by electrophotography using toner, dots caused by toner particles constituting the printing layer can be confirmed by microscopic observation. The plateless printing layer forms characters, patterns, etc., for example, by one printing layer containing one kind of toner, or by combining two or more printing layers containing mutually different toners. When printing by an 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. In the plateless printing layer formed by the inkjet method, dots caused by ink droplets can be confirmed. These dots are generally smaller than the dots resulting from plate irregularities in the plate printing layer.

The plate printing layer is formed by a conventionally known plate printing method such as a gravure printing method, a flexographic printing method, a letterpress rotary printing method, or a screen printing method. The plate printing method is a printing method using a plate prepared according to the formation pattern of the printing layer. The printing method applied to form the plate printing layer is preferably a gravure printing method or a flexographic printing method, and particularly preferably a gravure printing method. For example, traces of the uneven pattern of the plate remain on the plate printing layer.

The plate printing layer contains, for example, a coloring material and a binder resin, and may contain various additives. The plate printing layer can be formed using 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 or the like), and the binder resin and the coloring material are dissolved or dispersed in the solvent or the like. be. The solvent or the like is not particularly limited as long as it can dissolve or disperse the binder resin and the like.

The color (hue, brightness, saturation) of the plate printing layer can be arbitrarily set according to the design of characters and patterns. Purple, reddish purple, metallic colors (silver, gold, etc.), pearl colors, and the like can be mentioned. The color of the plate printing layer may be white, black, or gray (achromatic). The plate printing layer forms characters, patterns, etc., for example, by one printing layer containing one type of colorant, or by combining two or more printing layers containing mutually different colorants. By using various special color inks in the plate printing layer, color reproduction and stability that cannot be obtained in the plateless printing layer may be obtained in some cases. In addition, by using transparent ink, it is possible to suppress unevenness in the amount of ink deposited within the printing surface.

b) Design In the present disclosure, the first printed layer and the second printed layer are printed layers for displaying patterns, product names, manufacturer names, logo marks, product descriptions, etc. can be formed in an arbitrary pattern.

When the first printed layer and the second printed layer are laminated to form a bag or the like by laminating two laminated bodies, the first printed layer and the second printed layer are the laminated body constituting the front side or the laminated body constituting the back side. , the configuration will be different.
For example, the first printed layer and the second printed layer in the laminate constituting the front side are such that the design is exhibited by laminating these printed layers.

Specifically, the first printed layer in the laminate constituting the front side includes characters (persons, animals and plants, vehicles, machines, etc.), and the second printed layer in the laminate constituting the front side includes characters, Examples include product names, product and company logos, and illustrations.

In the case of the laminate constituting the front side, even when the first printed layer and the second printed layer are laminated, when viewed from the front side, the back surface is visible through the transparent sealant layer of the laminate constituting the back surface. It is necessary to configure so that the first printed layer to be composed can be visually recognized. For example, when the first printed layer and the second printed layer are translucent layers, or there is a region where the first printed layer and the second printed layer are not formed, the laminate constituting the back surface can be visually recognized from here. A case etc. can be mentioned.

On the other hand, it is preferable that the first printed layer in the laminate constituting the back side has a design that further improves the design by combining with the design shown by the laminate constituting the front side.
Specifically, examples of the background design of the design shown by the laminate constituting the front side include, for example, a background landscape image, a hidden message/code (which becomes visible after the package is opened and the contents are removed), and the like. be able to.

On the other hand, the second printed layer in the laminate constituting the back side has a design that can be accurately confirmed when viewed from the back side. For example, barcodes, descriptions about products, ingredient indications, warnings, website URLs, QR codes (registered trademark), and the like can be used.

It is preferable that the second printed layer in the laminate constituting the back surface is not visible when viewed from the front surface side. Specifically, it is preferable that a concealing layer, which will be described later, is provided, or that the layer is concealed by the first and second printed layers of the laminate constituting the front side, and further by the first printed layer constituting the back side. .

(2) First transparent substrate and second transparent substrate In the present disclosure, the first transparent substrate and the second transparent substrate are polyester (polyethylene terephthalate (PET), polyethylene naphthalate (PEN), respectively. , 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), polymethylmethacrylate (PMMA), polyethersulfone (PES), ethylene-vinyl alcohol copolymer (EVOH), and polystyrene (PS). A single layer film or a multi-layer film having two or more layers can be exemplified. Further, a single-layer film or a multi-layer film having two or more layers composed of a composite material containing the above resin and CaCO ₃ (calcium carbonate) can be exemplified. Examples of such a composite material include LIMEX (registered trademark) (manufactured by TBM Co., Ltd.) containing calcium carbonate and polypropylene. Each of the first transparent substrate and the second transparent substrate may be a stretched film or a non-stretched film.

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 base material is a multi-layer film having two or more layers, the thickness is obtained by stacking a plurality of single-layer films having the above thickness.

In the present disclosure, "transparent" means transparent in the visible light range, and for example, the total light transmittance is preferably 70% or more, and 80% or more. is more preferable, and 90% or more is even more preferable. Here, the total light transmittance can be measured according to JIS K7361-1, for example, by a haze meter HM150 manufactured by Murakami Color Research Laboratory.

2. Transparent sealant layer The transparent sealant layer in the present disclosure is formed by folding one laminate or stacking two laminates and heat-sealing the vicinity of the opposing edges to bond the edges together. are arranged in such a way that Here, the sealant layer in this disclosure is transparent. This is because, as described above, when two laminates are superimposed to form a bag or the like, it is necessary to visually recognize the laminate on the back side from the laminate on the front side. . In addition, the transparent sealant layer is disposed closest to the accommodation portion side when the laminate is made into a packaging bag.

Materials constituting the transparent sealant layer include, for example, low density PE (LDPE), linear low density PE (LLDPE), medium density PE (MDPE), high density PE (HDPE), ethylene-vinyl acetate copolymer. , propylene homopolymers, ethylene-propylene block copolymers, ethylene-propylene random copolymers, and other polyolefin resins, and 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 a non-stretched film made of the aforementioned resin in order to suppress shrinkage during heat sealing. For example, the transparent sealant layer is preferably a non-stretched propylene film (CPP).

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

3. Concealing layer In the laminate of the present embodiment, in the case of the laminate constituting the back side as described above, it is preferable that the concealing layer is arranged between the first printed layer and the second printed layer. .

FIG. 2 is a schematic cross-sectional view showing an example of the case where the laminate of the present embodiment includes a concealed area by a concealing layer. In the laminate shown in FIG. 2(a), the concealing layer 4 is arranged between the first printed layer 11, which is the non-plate printed layer (D), and the second printed layer 12, which is the plate printed layer (G). has a concealed area. In the laminate shown in FIG. 2(b), the concealing layer 4 is arranged between the first printed layer 11, which is the plateless printed layer (D), and the second printed layer 12, which is the plateless printed layer (D). has a concealed area.

The concealing layer 4 forms a non-transparent concealing region, and can conceal the first printed layer 11 when the laminate is viewed from the second printed film F2 side, and the laminate is treated as a transparent sealant layer. It is a layer that can conceal the second printed layer 12 when viewed from side 3, specifically when viewed from the front side when two laminates are laminated to form a bag or the like. . In addition, when the laminate is made into a bag to form a packaging bag, the second printed layer is located on the back side of the first printed layer, so when observed from the back side of the bag, the background color of the second printed layer is It is preferable to play the role of displaying.

By arranging the concealing layer between the first printed layer and the second printed layer in this way, for example, when the laminate is observed from the second printed film side, the second printed layer is replaced by the first printed layer. can be visually recognized while suppressing the show-through, and the visibility of the second printed layer can be further improved. Therefore, the second printed layer is effective when high readability is required (for example, characters and codes related to product information, etc.).

The concealing layer is not particularly limited as long as it is a layer capable of concealing, and examples thereof include a layer formed using a known ink capable of concealing coloring, a metal layer, and the like. In the present disclosure, layers formed using known inks capable of concealing coloring are preferred.
Such a concealing layer is usually a solid layer, that is, formed over the entire surface, but may be partially formed as long as it can conceal the first printed layer or the second printed layer. Examples of the ink include a colored ink obtained by dissolving (or dispersing) a known coloring agent (dye or pigment) together with a binder resin in a solvent (or dispersion medium).

In particular, by printing a white ink layer and a silver ink layer overlaid by a gravure printing method, it is possible to improve the color development of the black, red, indigo, and yellow inks of the second printing layer while increasing the hiding property. can. Alternatively, a white ink layer, a silver ink layer, and a white ink layer may be overlapped and printed. Furthermore, by removing part of the white ink layer, it is possible to make the silver visible and give a glossiness only to the necessary parts. Moreover, you may form by printing a white ink layer by digital printing.

4. Others The laminate of the present embodiment can include, at arbitrary positions, layers described later in addition to the transparent sealant layer, the first printed film, and the second printed film.

(1) Adhesive Layer The laminate of the present embodiment may have an adhesive layer between the transparent sealant layer and the first printed film and between the first printed film and the second printed film. The adhesive layer can be formed from a conventionally known adhesive. The adhesive may be a one-component curing type, a two-component curing type, or a non-curing type adhesive. 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. Adhesives having gas barrier properties include adhesive compositions containing a polyester polyol, an isocyanate compound, and a plate-like inorganic compound.

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

(3) Gas Barrier Layer The laminate of the present embodiment may have a gas barrier layer. The gas barrier layer blocks permeation of oxygen, water vapor, and the like between the storage portion of the packaging material and the external environment when the bag is made into a packaging bag. The gas barrier layer may also impart a light-shielding property that blocks transmission of visible light, ultraviolet rays, and the like. The gas barrier layer may be composed of one layer, or may be composed of multiple layers of two or more layers.

The gas barrier layer can be composed of known materials. The gas barrier layer is preferably arranged between the transparent sealant layer and the first printed film. For example, a vapor deposition film or a coating film having gas barrier properties may be formed on the surface of the transparent sealant layer.

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

5. Application The laminate of the present embodiment can be used as a sheet for forming a packaging bag. Since the packaging bag forming sheet will be described in detail later in "D. Packaging bag forming sheet", description thereof will be omitted here. In addition to packaging bags, it can also be used as a manufacturing sheet for clear files, roll labels, shrink labels, tack labels, seal labels, and the like.

B. Laminate (second embodiment)
A second embodiment of the laminate of the present disclosure has a transparent sealant layer that is transparent, a first printed layer, a second printed layer, and a transparent base material that is transparent in this order, and the first printing It is characterized in that the layer and the second printed layer are arranged so as to overlap each other in plan view, and at least one of the first printed layer and the second printed layer is a plateless printed layer.

FIG. 3 is a schematic cross-sectional view showing an example of the laminate of this embodiment. As shown in FIG. 3, the laminate 20 of this embodiment has a transparent sealant layer 3, a first printed layer 11, a second printed layer 12, and a transparent substrate 5 in this order. In this embodiment, at least one of the first printed layer 11 and the second printed layer 12 is a plateless printed layer, and the concealing layer 4 is arranged between the first printed layer 11 and the second printed layer 12. It may also have a hidden area that is covered. In the laminate shown in FIG. 3(a), the first printed layer 11 is the plateless printed layer (D), and the second printed layer 12 is the plated printed layer (G). In the laminate shown in FIG. 3B, both the first printed layer 11 and the second printed layer 12 are plateless printed layers (D).

By combining the plateless printing layer with another printing layer, the laminate of the present embodiment has a high degree of designability for the reasons described above. Furthermore, since the laminate of the present embodiment only needs to have one transparent substrate, it is easier to manufacture. Also, it is possible to reduce the material cost and the environmental load.

Furthermore, in this embodiment, a masking layer may be arranged. The concealing layer is disposed between the first printed layer and the second printed layer to form a non-transparent concealed region, and when the laminate is viewed from the transparent substrate 5 side, the first printed layer 11 and can hide the second printed layer 12 when the laminate is viewed from the transparent sealant layer 3 side.

For example, when the laminate is observed from the transparent substrate side, the second printed layer can be visually recognized while suppressing the show-through of the first printed layer, thereby further improving the visibility of the second printed layer. can be done. Therefore, the second printed layer is effective when high readability is required (for example, characters and codes related to product information, etc.).

The transparent sealant layer may be the same as the above-described "A. Laminate (first embodiment) 2. Transparent sealant layer". Further, as the first printed layer and the second printed layer, the above-mentioned "A. Laminate (first embodiment) 1. First printed film and second printed film (1) First printed layer and second printed layer ' can be the same. The transparent substrate should be the same as the above-mentioned "A. Laminate (first embodiment) 1. First printed film and second printed film (2) First transparent substrate and second transparent substrate". can be done. The concealing layer may be the same as the concealing layer described in the above-mentioned "A. Laminate (first embodiment) 3. Concealing layer".

In addition, the laminate of the present embodiment is described in "A. Laminate (first embodiment) 4. Others" in addition to the transparent sealant layer, the first printed layer and the second printed layer, the transparent substrate, and the concealing layer. layer can be included at any location.

The use of the laminate of the present embodiment is the same as in "A. Laminate (first embodiment) 5. Use" described above.

C. Laminate set1. First Embodiment The 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 at least one main surface side of the first transparent substrate A first printed film having a first printed layer disposed on a second transparent substrate, and a second printed layer disposed on at least one main surface side of the second transparent substrate. 2 printed films in this order, wherein 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 empty. a first laminate, which is a plate printing layer; a transparent second transparent sealant layer; a transparent third transparent substrate; a third printed film having three printed layers; a fourth printed film having a fourth transparent substrate that is transparent; and 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 in plan view, and at least one of the third printed layer and the fourth printed layer is a plateless printing layer , and a second laminate, wherein the first laminate and the second laminate are laminated so that the first transparent sealant layer and the second transparent sealant layer face each other. and

The laminate set in this embodiment is the laminate described in "A. Laminate (first embodiment)" above, and two of these are laminated, and each is used as a front side laminate and a back side laminate. body set. That is, the first laminate is the laminate constituting the front side of the laminate described in "A. Laminate (first embodiment)" above, and the second laminate is the laminate described in "A. Laminate (first embodiment)" above. 1 embodiment)” can be used as a laminate constituting the back side of the laminate described above.

The first transparent sealant layer of the first laminate is the same as the transparent sealant layer in the laminate described in "A. Laminate (first embodiment)" above. Further, the second transparent sealant layer, the third transparent base material, the third printed layer, the fourth transparent base material, and the fourth printed layer of the second laminate are the same as in the above "A. Laminate (first embodiment) , the transparent sealant layer, the first transparent substrate, the first printed layer, the second transparent substrate, and the second printed layer in the laminate described in .

These configurations are the same as those described for the laminate described in the above "A. Laminate (first embodiment)", so descriptions thereof will be omitted here.

In the case of such a laminate set, for example, in the case of the use of a packaging bag, the first laminate and the second laminate are prepared, and the first transparent sealant layer and the second transparent sealant layer are arranged so as to face each other. The bag can be formed by placing it in a container and heat-sealing its perimeter.

2. Second Embodiment A second embodiment of the laminate set in the present disclosure includes 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 plan view, and at least one of the first printed layer and the second printed layer is a plateless printed layer. 3 laminate, a transparent second transparent sealant layer, a third printed layer, a fourth printed layer, and a transparent second transparent substrate in this order, and the third printed layer and the a fourth laminate in which the fourth printed layer is arranged to overlap in a plan view, and at least one of the third printed layer and the fourth printed layer is a plateless printed layer; The laminated body and the fourth laminated body are laminated and used so that the first transparent sealant layer and the second transparent sealant layer face each other.

The laminate set in this embodiment is the laminate described in "B. Laminate (second embodiment)" above, and two of these are laminated, and each of them is used as a front side laminate and a back side laminate. body set. That is, the third laminate is the laminate constituting the front side of the laminate described in "B. Laminate (second embodiment)" above, and the fourth laminate is the laminate described in "B. Laminate (second embodiment)" above. Second Embodiment)” can be a laminate constituting the back side of the laminate described above.

The first transparent sealant layer and the first transparent substrate of the third laminate are the same as the transparent sealant layer and the transparent substrate in the laminate described in "B. Laminate (second embodiment)" above. It is the same. Further, the second transparent sealant layer, the third printed layer, the fourth printed layer, and the second transparent substrate of the fourth laminate are the laminate described in the above "B. Laminate (second embodiment)" The transparent sealant layer, the first printed layer, the second printed layer, and the transparent substrate in .

These configurations are the same as those described for the laminate described in the above "A. Laminate (first embodiment)", so descriptions thereof will be omitted here.

For such a laminate set, for example, in the case of the use of a packaging bag, the third laminate and the fourth laminate are prepared, and the first transparent sealant layer and the second transparent sealant layer are arranged so as to face each other. The bag can be formed by placing it in a container and heat-sealing its perimeter.

D. Packaging bag forming sheet1. First Embodiment The packaging bag forming sheet in this embodiment is a packaging bag forming sheet using the first embodiment of the laminate set described above, and the first transparent sealant layer and the second transparent sealant layer is the same common sealant layer, and the first transparent substrate and the third transparent substrate are the same transparent substrate, the second transparent substrate and the fourth a second common transparent substrate, wherein the transparent substrate is the same transparent substrate, the first printed layer and the third printed layer are arranged adjacent to each other on the first common transparent substrate, and a second printed layer and said fourth printed layer are disposed adjacently on said second common transparent substrate, said first printed layer and said second printed layer, and said third printed layer and said fourth printed layer; The common sealant layer, the first common transparent base material, and the second common transparent base material are laminated in this order such that they overlap in plan view.

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

FIG. 6 is a schematic diagram showing an example of a sheet for forming a packaging bag and a packaging bag using the same according to the present embodiment. A sheet 50 for forming a packaging bag shown in FIG. 6A has a front-side laminated body 51 and a back-side laminated body 52 with a portion S to be folded sandwiched therebetween. According to this embodiment, the front side laminate 51 is the first laminate in "C. Laminate set" having the first printed layer (picture C) and the second printed layer (picture A), and the back side The laminate 52 is the second laminate in "C. laminate set" having the third printed layer (picture D) and the fourth printed layer (picture B).

The packaging bag forming sheet 50 is folded at the folding planned portion S, overlapped, and the peripheral edge portion is heat-sealed to form the sealed portion 103, and the packaging bag 100 having the front surface 101 and the back surface 102 is obtained (Fig. 6(b)).

Although the manufacturing method of the packaging bag forming sheet of the present embodiment is not particularly limited, it can be manufactured as follows, for example. FIG. 4(a) is a diagram illustrating an example of a method for manufacturing a packaging bag forming sheet according to the present embodiment.

First, a second printed layer (pattern A) and a fourth printed layer (pattern B) are formed on the second common transparent substrate 2 by plateless printing (step 1). At this time, it is preferable to attach a mark for alignment. According to plateless printing, it is possible to print while continuously changing a plurality of patterns. At this time, a masking layer is formed in an arbitrary region as required. Next, an adhesive is applied to the second printed layer (pattern A) 12 side, and the first common transparent substrate 1 is adhered (step 2). A first printed layer (picture C) and a third printed layer (picture D) are formed by plateless printing on the side opposite to the second printed layer (picture A) 12 side of the first common transparent substrate 1. (Step 3). At this time, alignment marks are used to align with the second and fourth printed layers. According to plateless printing, positioning can be performed with high accuracy, and a plurality of patterns can be printed while continuously changing. Next, an adhesive is applied to the first printed layer (pattern C) 11 side, and the common sealant layer 3 is adhered (step 4). Thereby, a sheet for forming a packaging bag is obtained.

FIG. 4(b) is a diagram illustrating another example of the method for manufacturing the packaging bag forming sheet according to the present embodiment.
First, a second printed layer (pattern A) and a fourth printed 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 a mark for alignment. At this time, if necessary, a masking layer may be formed in the area of the fourth printed layer (pattern B) which will be the laminate on the back side. Next, an adhesive is applied to the second printed layer (pattern A) 12 side, and the first common transparent substrate 1 is adhered (step 2). A first printed layer (picture C) and a third printed layer (picture D) are formed by plateless printing on the side of the first common transparent substrate 1 opposite to the second printed layer (picture A) 12 side. (Step 3). At this time, alignment marks are used to align the second printed layer (pattern A) and the fourth printed layer (pattern B). According to plateless printing, positioning can be performed with high accuracy, and a plurality of patterns can be printed while continuously changing. Next, an adhesive is applied to the first printed layer (pattern C) 11 side, and the common sealant layer 3 is adhered (step 4). Thereby, a sheet for forming a packaging bag is obtained.

2. Second Embodiment The packaging bag forming sheet in this embodiment is a packaging bag forming sheet using the second embodiment of the laminate set described above, and the first transparent sealant layer and the second transparent sealant A common transparent substrate, wherein the layers are the same common sealant layer, the first transparent substrate and the second transparent substrate are the same transparent substrate, and the first printed layer and the third printed layer , and the second printed layer and the fourth printed layer are disposed adjacently on the common transparent substrate, the first printed layer and the second printed layer, and the third printed layer and the fourth printed layer The common sealant layer and the common transparent substrate are laminated so that the layers overlap when viewed from above.

FIG. 5 is a diagram illustrating an example of the method for manufacturing the packaging bag forming sheet of the present embodiment.
First, a second printed layer (pattern A) and a fourth printed layer (pattern B) are formed on the common transparent substrate 5 by plate printing (or plateless printing) (step 1). At this time, it is preferable to attach a mark for alignment. Further, a masking layer may be formed in the area of the fourth printed layer (pattern B) which will be the laminated body on the back side. Next, the first printed layer (picture C) and the third printed layer (picture D) are formed on the second printed layer (picture A) 12 side by plateless printing (step 2). At this time, alignment marks are used to align the second printed layer (pattern A) and the fourth printed layer (pattern B). According to plateless printing, it is possible to increase positioning accuracy and to print while continuously changing a plurality of patterns. Next, an adhesive is applied to the first printed layer (pattern C) 11 side, and the common sealant layer 3 is adhered (step 3). Thereby, a sheet for forming a packaging bag is obtained.

The packaging bag forming sheet of the present embodiment can be formed by one example of the manufacturing method described above. A printed layer (picture B) is arranged adjacent to each other, and a first printed layer (picture C) and a third printed layer (picture D) are laminated on each of the printed layers, and the first printed layer ( Picture C) and the second printed layer (picture A), and the third printed layer (picture D) and the fourth printed layer (picture B) are arranged so as to overlap each other in plan view.

Other points of this embodiment are the same as those of the first embodiment described above, so description thereof will be omitted here.

E. Packaging bag1. First Embodiment A packaging bag of the present embodiment is a packaging bag using the first embodiment of the laminate set described above, wherein the first laminate and the second laminate are combined with 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 are arranged to overlap in plan view, and the first The first transparent sealant layer and the second transparent sealant layer are heat-sealed in a part of the periphery of the laminate and the second laminate.

FIG. 6(b) is a schematic diagram showing an example of the packaging bag of this embodiment. The packaging bag 100 of the present embodiment has a front surface 101 and a back surface 102 formed by folding the above-described first laminate and second laminate so that the sealant layer is on the inside, and a container O capable of containing contents. , and a sealing portion 103 formed around the accommodating portion and in which opposing sealant layers are sealed to each other. The shape of the packaging bag of the present disclosure is not limited to the three-sided seal bag shown in FIG.

When the packaging bag of the present embodiment is observed from the surface side of the bag, the pattern formed by overlapping the patterns of the first printed layer and the second printed layer included in the bag surface can be seen. Furthermore, the contents can be observed through the surface of the bag. Further, when the contents are removed, the third printed layer on the back of the bag can also be visually recognized, and in addition to the first printed layer and the second printed layer, the third printed layer can be visually recognized at the same time , the design can be made deeper, and new design effects such as using the third printed layer as a background can be imparted.

In addition, when the back surface of the packaging bag has the above-described concealing layer, the fourth printed layer on the back surface of the bag can be reliably viewed when observed from the back surface side of the bag, and the barcode etc. Visibility of important information can be improved

With the packaging bag of the present embodiment, it is possible to provide a greater variety of patterns depending on the types of patterns on the front and back surfaces and the combination of the front and back surfaces. For example, by opening the package and taking out the contents, the design can be such that the hidden pattern inside can be seen. In this case, it is possible to provide the enjoyment of not knowing what kind of picture (character, landscape, illustration, person, etc.) is hidden until purchase and opening. It can also be used for printing a proof of purchase, such as a serial code, which is preferably hidden until the package is opened. Furthermore, when viewed from the front side, it is possible to obtain a pattern in which the first printed layer and the second printed layer included on the front side overlap with the third printed layer included on the back side, giving a sense of depth and three-dimensional effect. can be design. Furthermore, it is also possible to design the printed layer on the inside of the front and back surfaces with the contents.

2. Second Embodiment A packaging bag of this embodiment is a packaging bag using the second embodiment of the laminate set described above, wherein the third laminate and the fourth laminate are combined with 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 are arranged to overlap in plan view, and the third lamination The first transparent sealant layer and the second transparent sealant layer are heat-sealed in a portion of the periphery of the body and the fourth laminate.

The description of the packaging bag of this embodiment overlaps with the description of the packaging bag of the first embodiment, so the description is omitted here.

Note that the present disclosure is not limited to the above embodiments. The above embodiment is an example, and any device that has substantially the same configuration as the technical idea described in the claims of the present disclosure and achieves the same effect is the present invention. It is included in the technical scope of the disclosure.

Examples are given below to describe 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 printed layer (pattern A) and a fourth printed layer (pattern B) were formed adjacently on one side of a polyester (PET) film by digital printing. At this time, printing was performed while continuously changing a plurality of patterns. In addition, marks were added for alignment. A polyester (PET) film becomes the outermost layer of the flexible packaging material. An adhesive is applied to the printed layer side surface of the polyester (PET) film on which the second printed layer (pattern A) and the fourth printed layer (pattern B) are formed, and another PET film (first common transparent substrate ) were pasted together. A first printed layer (pattern C) and a third printed layer (pattern D) were formed by digital printing on the side opposite to the second printed layer and the fourth printed layer side of the first common transparent substrate. At this time, printing was performed while continuously changing a plurality of patterns. Also, alignment marks were used to align the patterns of the second printed layer (picture A) and the fourth printed layer (picture B).

An adhesive is applied to the surface of the polyester (PET) film on which the first printed layer (pattern C) and the third printed layer (pattern D) are formed, on the first printed layer side, and the polyethylene film (common sealant layer 3) is applied. pasted together. The polyethylene film becomes the innermost layer of the flexible packaging material. As a result, a sheet for forming a packaging bag composed of a laminate was obtained.

The sheet for forming a packaging bag was processed with a three-sided seal bag making machine to form a bag. The above bag was filled with contents by a filling machine, and the open end was sealed to obtain a package.

(Example 2)
As shown in FIG. 4B, a polyester (PET) film was prepared as the second common transparent substrate 2 . A second printed layer (pattern A) and a fourth printed layer (pattern B) were formed on one surface of a polyester (PET) film by gravure printing. In addition, marks were added for alignment. A polyester (PET) film becomes the outermost layer of the flexible packaging material. An adhesive is applied to the printed layer side surface of the polyester (PET) film on which the second printed layer (pattern A) and the fourth printed layer (pattern B) are formed, and another PET film (first common transparent substrate 1) was pasted together. A first printed layer (pattern C) and a third printed layer (pattern D) were formed by digital printing on the side opposite to the adhesive layer of the first common transparent substrate. At this time, printing was performed while continuously changing a plurality of patterns. Also, alignment marks were used to align the patterns of the second printed layer (picture A) and the fourth printed layer (picture B).

Adhesive is applied to the printed layer side surface of the polyester (PET) film on which the first printed layer (pattern C) and the third printed layer (pattern D) are formed, and a polyethylene film (common sealant layer 3) is attached. rice field. The polyethylene film becomes the innermost layer of the flexible packaging material. As a result, a sheet for forming a packaging bag composed of a laminate was obtained.

The sheet for forming a packaging bag was processed with a three-sided seal bag making machine to form a bag. The above bag was filled with contents by a filling machine, and the open end was sealed to obtain a package.

(Example 3)
As shown in FIG. 5, a polyester (PET) film was prepared as the common transparent substrate 5 . A second printed layer (pattern A) and a fourth printed layer (pattern B) were formed on one surface of a polyester (PET) film by gravure printing. In addition, marks were added for alignment. A polyester (PET) film becomes the outermost layer of the flexible packaging material. The first printed layer (picture C) and the third printed layer (picture C) are digitally printed on the printed layer side surface of the polyester (PET) film on which the second printed layer (picture A) and the fourth printed layer (picture B) are formed. A pattern D) was formed. At this time, printing was performed while continuously changing a plurality of patterns. Also, alignment marks were used to align the patterns of the second printed layer (picture A) and the fourth printed layer (picture B).

An adhesive was applied to the surfaces of the first printed layer (pattern C) and the third printed layer (pattern D), and a non-stretched polypropylene (CPP) film (common sealant layer 3) was laminated. A non-stretched polypropylene (CPP) film becomes the innermost layer of the flexible packaging material. As a result, a sheet for forming a packaging bag composed of a laminate was obtained.

The sheet for forming a packaging bag was processed with a three-sided seal bag making machine to form a bag. The above bag was filled with contents by a filling machine, and the open end was sealed to obtain a package.

REFERENCE SIGNS LIST 1 first common transparent substrate 2 second common transparent substrate 3 common sealant layer 4 concealing layer 5 transparent substrate 11 first printed layer 12 second printed layer 10 laminate (first embodiment form)
20... Laminate (second embodiment)
50... Sheet for forming packaging bag 100... Packaging bag

Claims (16)

a 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 transparent second transparent substrate 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,
A laminate, wherein at least one of the first printing layer and the second printing layer is a plateless printing layer. 2. The laminate according to claim 1, comprising an obscuring layer between said first printed layer and said second printed layer. Having a transparent sealant layer, a first printed layer, a second printed layer, and a transparent transparent substrate in this order,
The first printed layer and the second printed layer are arranged so as to overlap in plan view,
A laminate, wherein at least one of the first printing layer and the second printing layer is a plateless printing layer. 4. The laminate according to claim 3, comprising an obscuring layer between said first printed layer and said second printed layer. 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 transparent second transparent substrate 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,
a first laminate, wherein at least one of the first printed layer and the second printed layer is a plateless printed layer;
a second transparent sealant layer that is transparent;
a third printed film having a transparent third transparent substrate and a third printed layer disposed on at least one major 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 in this order;
The third printed layer and the fourth printed layer are arranged so as to overlap in plan view,
a second laminate, wherein at least one of the third printed layer and the fourth printed layer is a plateless printed layer;
has
A laminate set in which the first laminate and the second laminate are laminated so that the first transparent sealant layer and the second transparent sealant layer face each other. 6. The laminate set according to claim 5, comprising a concealing layer between said third printed layer and said fourth printed layer. Having 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 plan view,
a third laminate, wherein at least one of the first printed layer and the second printed layer is a plateless printed layer;
Having 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 in plan view,
a fourth laminate, wherein at least one of the third printed layer and the fourth printed layer is a plateless printed layer;
has
A laminate set in which the third laminate and the fourth laminate are laminated so that the first transparent sealant layer and the second transparent sealant layer face each other. 8. The laminate set according to claim 7, comprising a concealing layer between said third printed layer and said fourth printed layer. A packaging bag forming sheet using the laminate set according to claim 5,
wherein the first transparent sealant layer and the second transparent sealant layer are the same common sealant layer;
a first common transparent substrate, wherein the first transparent substrate and the third transparent substrate are the same transparent substrate;
a second common transparent substrate, wherein the second transparent substrate and the fourth transparent substrate are the same transparent substrate;
said first printed layer and said third printed layer are disposed adjacently on said first common transparent substrate;
said second printed layer and said fourth printed layer are disposed adjacently on said second common transparent substrate;
The common sealant layer, the first common transparent base material, and the second common transparent substrate are arranged such that the first printed layer and the second printed layer, and the third printed layer and the fourth printed layer overlap when viewed from above. A sheet for forming a packaging bag, in which common transparent substrates are laminated in this order. The packaging bag forming sheet according to claim 9, further comprising a concealing layer between the third printed layer and the fourth printed layer. A packaging bag forming sheet using the laminate set according to claim 7,
wherein the first transparent sealant layer and the second transparent sealant layer are the same common sealant layer;
a common transparent substrate in which the first transparent substrate and the second transparent substrate are the same transparent substrate;
said first printed layer and said third printed layer and said second printed layer and said fourth printed layer are disposed adjacently on said common transparent substrate;
The common sealant layer and the common transparent substrate are laminated such that the first printed layer and the second printed layer, and the third printed layer and the fourth printed layer overlap in plan view, Sheet for forming packaging bags. The packaging bag forming sheet according to claim 11, further comprising a concealing layer between the third printed layer and the fourth printed layer. A packaging bag using the laminate set according to claim 5,
The first laminate and the second laminate are opposed by the first transparent sealant layer and the second transparent sealant layer, and the first printed layer, the second printed layer, the third printed layer, Arranged so that the fourth printed layer overlaps in plan view,
A packaging bag, wherein the first transparent sealant layer and the second transparent sealant layer in a portion of the periphery of the first laminate and the second laminate are heat-sealed. 14. The packaging bag according to claim 13, further comprising a concealing layer between said third printed layer and said fourth printed layer. A packaging bag using the laminate set according to claim 7,
The third laminate and the fourth laminate are opposed by the first transparent sealant layer and the second transparent sealant layer, and the first printed layer, the second printed layer, the third printed layer, Arranged so that the fourth printed layer overlaps in plan view,
A packaging bag, wherein the first transparent sealant layer and the second transparent sealant layer in part of the periphery of the third laminate and the fourth laminate are heat-sealed. 16. The packaging bag according to claim 15, further comprising a concealing layer between said third printed layer and said fourth printed layer.

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