JP7008274B2 - Laminates and cards made using them - Google Patents

Description

The present invention relates to a laminated body and a card produced by using the laminated body.

AD cards such as ID cards and IC cards such as banks have a photograph of a person's face and textual information such as the person's address and name written on the surface of the card so that they can be individually recognized. Personal information is recorded in the memory of electronic components. Therefore, even if the face photo or text information printed on the surface of the card is altered, it can be seen that the card has been altered by collating it with the personal information recorded in the memory inside the card. It has become.

Such a card can usually be produced by adhering an inlet between the front base material and the back base material using an adhesive (Patent Document 1).

For the card disclosed in Patent Document 1, it is necessary to determine the materials of the front base material and the back base material at the time of manufacture, and after the production, the specifications of the card such as changing the material of the base material are changed. I couldn't change it.

Japanese Unexamined Patent Publication No. 2000-298714

The present invention has been made in view of the above problems, and is to provide a laminate that can be used for manufacturing cards having various specifications.

The laminate of the present invention is characterized by including a front adhesive layer, a card core layer accommodating an inlet, and a back adhesive layer in this order.

Further, in one embodiment, the laminate of the present invention comprises a front peeling base material, a front adhesive layer, a card core layer containing an inlet, a back adhesive layer, and a back peelable base material in this order. When the peeling base material and the back peeling base material are peeled off, the front adhesive layer and the back adhesive layer remain on the card core layer side.

In one embodiment, the laminate of the present invention has a release layer between the front peeling base material and the front adhesive layer, and between at least one of the back peeling base materials and the back adhesive layer. Further prepare.

In one embodiment, the thickness of the front adhesive layer and the back adhesive layer included in the laminate of the present invention is 1 μm or more and 10 μm or less.

In one embodiment, at least one of the front adhesive layer and the back adhesive layer contains a vinyl chloride-vinyl acetate copolymer.

The card of the present invention is produced by the above-mentioned laminated body, and is characterized in that a front base material, a front adhesive layer, a card core layer, a back adhesive layer, and a back base material are provided in this order. ..

In one embodiment, the card of the present invention further comprises a pre-printing layer between the front substrate and the front adhesive layer, and between at least one of the layers between the back substrate and the back adhesive layer. ..

Further, in one embodiment, the card of the present invention is characterized by including a front transfer layer, a front adhesive layer, a card core layer, a back adhesive layer, and a back transfer layer in this order.

In one embodiment, at least one of the front transfer layer and the back transfer layer included in the card of the present invention includes a protective layer.

In one embodiment, at least one of the front transfer layer and the back transfer layer included in the card of the present invention includes a release layer, a protective layer, and an adhesive layer in this order.

According to the present invention, it is possible to provide a laminate that can be used for producing cards having various specifications.

FIG. 1 is a schematic cross-sectional view showing an embodiment of the laminated body of the present invention. FIG. 2 is a schematic cross-sectional view showing an embodiment of the laminated body of the present invention. FIG. 3 is a schematic cross-sectional view showing an embodiment of the card of the present invention. FIG. 4 is a schematic cross-sectional view showing an embodiment of the card of the present invention. FIG. 5 is a schematic cross-sectional view showing an embodiment of the card of the present invention.

(Laminated body)
Hereinafter, an embodiment of the laminated body of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the laminated body 10 of the present invention includes a front adhesive layer 11, a card core layer 13 containing an inlet 12, and a back adhesive layer 14 in this order.
Further, in another embodiment, as shown in FIG. 2, the laminated body 10 of the present invention is back-bonded to the surface peeling base material 15, the surface adhesive layer 11, and the card core layer 13 containing the inlet 12. The layer 14 and the back peeling base material 16 are provided in this order. Further, the laminate of the present invention may be provided with a release layer between at least one of the layers between the front release base material and the front adhesive layer and between the back release base material and the back adhesive layer. Good (not shown).
The front adhesive layer 11 and the back adhesive layer 14 are collectively referred to as an adhesive layer, and the front release base material 15 and the back release base material 16 are collectively referred to as a release base material.

(Front adhesive layer and back adhesive layer)
The adhesive layer can contain a resin that melts or softens by heat and develops adhesiveness, for example, polyvinyl acetate, polyvinyl butyral (PVB), ethylene-vinyl acetate copolymer and vinyl chloride-vinyl acetate copolymer weight. Vinyl resin such as coalesced resin, polyolefin resin such as polyethylene (PE) and polypropylene (PP), polyester resin such as polyethylene terephthalate (PET) and polybutylene terephthalate (PBT), polyamide resin, polyimide resin, polyacrylate. (Meta) acrylic resins such as polymethacrylate and polymethylmethacrylate, cellulose-based resins such as cellulose diastase, polyurethane-based resins and the like can be mentioned.
Among the above-mentioned resins, the vinyl chloride-vinyl acetate copolymer improves the adhesiveness between the card core layer and the base material or the transfer layer when the laminate of the present invention is used for producing the card described later. It is preferable because it can be used. More specifically, when the base material or transfer layer of the card is peeled off to modify the card, the card core layer is also peeled off together with the base material or the like, and in some cases, the inlet housed in the card core layer is released. It is preferable because it is destroyed and it becomes difficult to modify it.
Among the above-mentioned resins, by using polyvinyl acetate, ethylene-vinyl acetate copolymer, vinyl chloride-vinyl acetate copolymer, PVB, cellulose diastase, etc., the adhesive layer can be imparted with a function as a receiving layer. Images can be formed with sublimable dyes, heat-meltable inks, and the like.
The image formed on the adhesive layer may be formed on only one surface or on both sides.

The content of the resin in the adhesive layer is preferably 30% by mass or more and 90% by mass or less, and more preferably 40% by mass or more and 80% by mass or less. Thereby, the adhesiveness of the adhesive layer to the card core layer can be further improved.

The adhesive layer may contain a mold release material such as a silicone oil, a phosphoric acid ester-based plastic material, a fluorine-based compound, a wax, a metal soap, and a filler. Thereby, when the laminate of the present invention includes the front peeling base material and the back peeling base material, the adhesiveness to these peeling base materials can be adjusted.

The content of the release material in the adhesive layer is preferably 0.1% by mass or more and 10% by mass or less, and more preferably 0.5% by mass or more and 5% by mass or less. Thereby, the adhesiveness to the peeling substrate can be made more preferable.

Further, the adhesive layer is a plastic material, a filler, an ultraviolet stabilizing material, a coloring inhibitor, a fluorescent whitening material, a matte material, a deodorant material, a flame retardant material, and a weather resistant material as long as the characteristics of the present invention are not impaired. , Antistatic material, thread friction reducing material, slip material, antioxidant material, ion exchange material, dispersant material, ultraviolet absorber, and additive material such as coloring material such as pigment and dye can be included.

The thickness of the adhesive layer is preferably 1 μm or more and 10 μm or less, and more preferably 2 μm or more and 7 μm or less. By setting the thickness of the adhesive layer within the above numerical range, the suitability for image formation, the transferability of the transfer layer, and the peelability of the peelable base material are improved.

When the laminate of the present invention includes a peeling base material, the adhesive layer remains on the card core layer side when these are peeled off.

The materials constituting the front adhesive layer and the back adhesive layer and their thicknesses may be the same or different.

(Card core layer)
The card core layer is a layer having a function of accommodating and protecting the inlet.
In one embodiment, the card core layer comprises a hot melt adhesive, for example, a thermosetting hot melt adhesive, a two-component curing hot melt adhesive, an ultraviolet curable hot melt adhesive, a moisture curing hot melt adhesive. Materials and the like can be mentioned. Among these, a moisture-curable hot-melt adhesive is preferable because of its adhesiveness to the adhesive layer and smoothness when the peeled base material is peeled off.

In one embodiment, as shown in FIGS. 1 and 2, the inlet 12 housed in the card core layer 13 includes a film-shaped inlet base material 17, an IC chip 18 arranged on the inlet base material 17, and an IC. It has a configuration including an antenna 19 electrically connected to the chip 18 and a reinforcing plate 20 for protecting the IC chip 18.

The inlet base material is composed of, for example, a non-woven film or a film made of a resin such as PET, polyethylene naphthalate (PEN), polyvinyl chloride, or a vinyl chloride-vinyl acetate copolymer (hereinafter, simply referred to as a resin film), and is an antenna. Can be made of a conductor such as, for example, a metal (eg, Al, Cu, Ag), and the reinforcing plate can be made of a metal such as, for example, stainless steel.
From the viewpoint of preventing alteration when the laminate of the present invention is used for producing a card, the inlet base material is preferably composed of a non-woven fabric.

The IC chip 18 has a memory unit (not shown) for recording information, a control unit that controls an operation of recording information in the memory unit, an operation of reading information from the memory unit, and a wireless communication operation. Has (not shown). The IC chip 18 reads information from the interrogator such as a reader / writer (not shown) via the antenna 19, or records information input from the interrogator via the antenna 19. ing.

The thickness of the card core layer is preferably 50 μm or more and 500 μm or less, and more preferably 100 μm or more and 400 μm or less. By setting the thickness of the card core layer within the above numerical range, the inlet can be completely accommodated in the card core layer, and unevenness due to the inlet is generated on the laminate or the card surface produced by using the laminate. Can be prevented.

(Front peeling base material and back peeling base material)
In one embodiment, the laminate of the present invention comprises a front peeling base material and a back peeling base material.
Examples of the peeling substrate include PET, PBT, PEN, 1,4-polycyclohexylene methylene terephthalate, polyester resins such as terephthalic acid-cyclohexanedimethanol-ethylene glycol copolymer, nylon 6 and nylon 6, 6 and the like. Polyamide resin, polyolefin resin such as PE, PP and polymethylpentene, polyvinyl chloride, polyvinyl alcohol (PVA), (meth) acrylic resin, polyimide resin such as polyimide and polyetherimide, cellophane, cellulose acetate, A resin film composed of a cellulose resin such as nitrocellulose, cellulose acetate propionate (CAP) and cellulose acetate butyrate (CAB), a polystyrene resin such as polystyrene, a polycarbonate resin, an ionomer resin and the like can be used.

In one embodiment, the air permeability of the peeling substrate is preferably 1000 seconds or less. As a result, sufficient air permeability can be ensured, and when a moisture-curable hot-melt adhesive is used for producing the card core layer, it is preferable because the curing can be performed satisfactorily.
The air permeability can be measured according to JIS-P-8117.

The thickness of the release base material is not particularly limited, and may be 50 μm or more and 250 μm or less.

The materials constituting the front peeling base material and the back peeling base material and their thicknesses may be the same or different.

(Release layer)
In one embodiment, the laminate of the present invention comprises a release layer between at least one of the layers between the front release base material and the surface adhesive layer, and between the back release base material and the back adhesive layer. By providing the release layer of the present invention, the adhesive force between the release base material and the adhesive layer can be adjusted. The release layer remains on the peeling base material side when the peeling base material is peeled off.

In one embodiment, the release layer is made of a silicone resin such as (meth) acrylic resin, urethane resin, acetal resin, polyamide resin, polyester resin, melamine resin, polyol resin, cellulose resin and the like. Contains binder resin.

Further, in one embodiment, the release layer includes a release material such as a silicone oil, a phosphoric acid ester-based plastic material, a fluorine-based compound, a wax, a metal soap, and a filler.

The thickness of the release layer is not particularly limited, but can be, for example, 0.1 μm or more and 5 μm or less.

(Manufacturing method of laminated body)
The method for producing a laminate of the present invention is:
The process of preparing the front peeling base material and the back peeling base material,
A process of applying a coating liquid for forming a surface adhesive layer to one surface of the surface adhesive base material and drying it to form a surface adhesive layer.
Back peeling The process of applying a coating liquid for forming a back adhesive layer to one surface and drying it to form a back adhesive layer,
The process of applying the hot melt adhesive on the front adhesive layer and the back adhesive layer,
The process of arranging the inlet on the front adhesive layer or the back adhesive layer,
A process of laminating the front adhesive layer and the back adhesive layer by facing each other and heating and pressurizing.
It is characterized by including.

Further, in one embodiment, the method for producing a laminated body of the present invention includes a step of forming an image on at least one of a front adhesive layer and a back adhesive layer.

Further, in one embodiment, the method for producing a laminated body of the present invention includes a step of forming a release layer.

Further, in one embodiment, the method for producing a laminated body of the present invention includes a step of peeling a front peeling base material and a back peeling base material.

(Step of preparing the front peeling base material and the back peeling base material)
The peelable base material can be produced by melt-molding the above-mentioned resin by using a conventionally known method such as a T-die method or an inflation method. Alternatively, a commercially available product may be used.

(Step of forming front adhesive layer and back adhesive layer)
The adhesive layer is prepared by dispersing or dissolving the above-mentioned material in water or an appropriate solvent to obtain a coating liquid for forming an adhesive layer, which is used as a roll coating method, a reverse roll coating method, a gravure coating method, a reverse gravure coating method, or a bar. It can be formed by applying it on a peeling substrate by a known means such as a coating method and a rod coating method to form a coating film, and drying the coating film.

(Applying process of hot melt adhesive)
The application of the hot melt adhesive onto the adhesive layer can be performed by a known means such as a roll coater, a reverse roll coater, a gravure coater, a reverse gravure coater, a bar coater and a rod coater.

(Process for arranging inlets)
The method for producing a laminate of the present invention includes a step of arranging an inlet on a front adhesive layer or a back adhesive layer coated with a hot melt adhesive.

(Laminating process)
In the method for producing a laminated body of the present invention, after the inlet is arranged, the front adhesive layer and the back adhesive layer are faced to each other and heated and pressed to laminate them, and the surface adhesive base material, the surface adhesive layer, and the card core are laminated. It includes a step of obtaining a laminate composed of a layer, a back adhesive layer and a back peeling base material.
The heating temperature in the step is preferably 50 ° C. or higher and 130 ° C. or lower, and more preferably 60 ° C. or higher and 100 ° C. or lower. By setting the heating temperature within the above numerical range, the adhesiveness between these layers can be improved, and the occurrence of unevenness due to the inlet housed in the card core layer can be prevented.

(Image formation process on the adhesive layer)
In one embodiment, the method for producing a laminate of the present invention comprises an image forming step on an adhesive layer. The step can be performed between any steps as long as it is before the laminating step, and an image can be formed on the surface of the adhesive layer provided with the card core layer by the step. Further, the image formation on the adhesive layer can be performed by a printing method such as thermal transfer printing, gravure printing, offset printing, intaglio printing, screen printing or the like, which is a fusion type thermal transfer method or a sublimation type thermal transfer method. The image to be formed is not particularly limited, such as a pattern, a pattern, a common character string, or a frame.

(Release layer forming process)
The release layer is formed before the laminating step, and the material is dispersed or dissolved in water or a suitable solvent to form a roll coater, a reverse roll coater, a gravure coater, a reverse gravure coater, a bar coater, a rod coater, or the like. It can be formed by applying it on a peeling substrate to form a coating film by a known means of the above, and drying the coating film.

(Peeling process of front peeling base material and back peeling base material)
In one embodiment, the method for producing a laminated body of the present invention includes a step of peeling a peeling base material. Further, after the peeling base material is peeled off, an image may be formed on the adhesive layer provided in the laminated body by the above-mentioned conventionally known method. As a result, an image can be formed on the surface of the adhesive layer opposite to the surface on which the card core layer is provided.

(card)
The laminate of the present invention can be used for producing cards such as IC cards and AD cards.
In one embodiment, as shown in FIG. 3, the card 21 of the present invention has a surface base material 22 and a surface base material 22 on the laminate 10 of the present invention and the front adhesive layer 11 and the back adhesive layer 14 included in the laminate 10. It is provided with a backing material 23.
Further, the card 21 of the present invention has a pre-printing layer 24 between the front base material 22 and the front adhesive layer 11 and between at least one of the back base material 23 and the back adhesive layer 14. (See FIG. 4).
In addition, the front base material 22 and the back base material 23 are hereinafter collectively referred to as a base material.

Further, in another embodiment, as shown in FIG. 5, the card 21 of the present invention is transferred to the laminated body 10 of the present invention and the front adhesive layer 11 and the back adhesive layer 12 included in the laminated body 10. The layer 25 and the back transfer layer 26 are provided.
In one embodiment, the front transfer layer 25 and the back transfer layer 26 may include at least a protective layer 27 and a release layer 28. Further, in one embodiment, the front transfer layer 25 and the back transfer layer 26 may include an information recording layer (not shown).
The front transfer layer 25 and the back transfer layer 26 are hereinafter collectively referred to as a transfer layer.

(Front base material and back base material)
The base material constituting the card includes paper materials such as coated paper, printing paper, high-quality paper and kraft paper, and vinyl-based materials such as polyvinyl acetate, ethylene-vinyl acetate copolymer and vinyl chloride-vinyl acetate copolymer. Resins, polyolefin resins such as PE and PP, polyester resins such as PET, PET-G and PBT, polyamide resins, polyimide resins, (meth) acrylic resins, cellulose resins such as cellulose diastase, polystyrene and the like. A film formed of a styrene resin, an ionomer resin, or the like can be used.
Further, the laminate of the above-mentioned materials can be used as a base material. For example, a laminated body of a laminated film formed of high-quality paper and a polyolefin-based resin can be used.

The thickness of the base material is preferably 50 μm or more and 500 μm or less, and more preferably 100 μm or more and 450 μm or less. By setting the thickness of the base material within the above numerical range, the layer on the base material can be satisfactorily supported.
Further, the size of the base material (length and width) is not particularly limited, and the base material may have a size similar to that of the laminated body or may have a size larger than that of the laminated body.
When the laminate of the above-mentioned materials is used as a base material, the thickness and size of the materials constituting each layer may be the same or different.

The materials constituting the front base material and the back base material, and their sizes and thicknesses may be the same or different.

(Pre-printing layer)
The pre-printing layer is a layer on which an image is formed on at least one surface of a paper material or a resin film.
From the viewpoint of acceptability of sublimable dyes or heat-meltable inks, the pre-printed layer is made of polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, ethylene-vinyl acetate copolymer, vinyl chloride-vinyl acetate copolymer. It is preferable that the resin film is composed of a vinyl-based resin such as vinyl-based resin, a cellulose-based resin such as cellulose acetate, a polyester-based resin, a polycarbonate-based resin, and a resin such as a polyolefin-based resin.

The image may be formed by a conventionally known printing method such as thermal transfer printing, gravure printing, offset printing, intaglio printing, and screen printing.

The thickness of the pre-printed layer is not particularly limited and may be, for example, 0.5 μm or more and 10 μm or less.

(Front transfer layer and back transfer layer)
In one embodiment, the transfer layer included in the card of the present invention includes a protective layer as described above.
Further, in one embodiment, the transfer layer included in the card of the present invention includes a release layer on the protective layer.
In one embodiment, the transfer layer comprises an information recording layer.
In one embodiment, the information recording layer is provided below the protective layer.

(Protective layer)
The protective layer is a layer provided to improve the durability of the card. Further, when an image is formed on the adhesive layer included in the laminated body, this image can be protected.

The protective layer may contain a resin material such as a polyolefin resin, a vinyl resin, a (meth) acrylic resin, a cellulose resin, a polyester resin, a polyamide resin, a polycarbonate resin, a polystyrene resin, or a polyurethane resin. can.

The content of the resin material in the protective layer is preferably 30% by mass or more and 90% by mass or less, and more preferably 40% by mass or more and 80% by mass or less. By setting the content of the resin material in the protective layer within the above numerical range, the durability thereof can be further improved.

Further, the protective layer may include a mold release material. Examples of the release material include phosphoric acid esters, olefin / maleic acid copolymers, aminopolyether-modified silicone oils, epoxy-modified silicone oils, carboxyl-modified silicone oils, polyethylene waxes, amide waxes and the like.

The content of the release material in the protective layer is preferably 0.1% by mass or more and 13% by mass or less, and more preferably 0.5% by mass or more and 9% by mass or less. By setting the content of the release material in the protective layer within the above numerical range, the transferability from the thermal transfer sheet can be improved.

The protective layer is preferably 1 μm or more and 10 μm or less, and more preferably 2 μm or more and 7 μm or less. By setting the thickness of the protective layer within the above numerical range, the image formed on the adhesive layer can be better protected and its durability can be further improved.

(Release layer)
As will be described later, the release layer is a layer provided on the laminated body of the present invention in order to transfer the transfer layer included in the thermal transfer sheet satisfactorily.
In one embodiment, the release layer contains a cellulose-based resin, a vinyl-based resin, a polyurethane-based resin, a silicone-based resin, a fluorine-based resin, a fluorine-modified resin, a wax, and the like.
Examples of waxes include microcrystalline wax, carnauba wax, paraffin wax, fisher tropus wax, various low molecular weight polyethylenes, wood wax, beeswax, whale wax, ibota wax, wool wax, celac wax, candelilla wax, petrolactam, and some. Examples thereof include modified waxes, fatty acid esters and fatty acid amides. Of these, polyethylene wax is particularly preferable.

The thickness of the release layer is not particularly limited, but can be 0.1 μm or more and 5 μm or less.

(Information recording layer)
The information recording layer is a layer on which an image is formed, and is a vinyl resin such as polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, ethylene-vinyl acetate copolymer, vinyl chloride-vinyl acetate copolymer, and cellulose acetate. Includes resin materials composed of resins such as cellulose-based resins, polyester-based resins, polycarbonate-based resins, and polyolefin-based resins.

The image may be formed by a conventionally known printing method such as thermal transfer printing, gravure printing, offset printing, intaglio printing, and screen printing.

The thickness of the information recording layer is not particularly limited, and can be, for example, 0.5 μm or more and 10 μm or less.

(Card manufacturing method)
In one embodiment, the card of the present invention can be produced by heating and pressurizing a front base material, the above-mentioned laminated body and a back base material, and laminating them. The heating temperature at this time is preferably 50 ° C. or higher and 130 ° C. or lower, and more preferably 60 ° C. or higher and 100 ° C. or lower.

In another embodiment, the card of the present invention can be produced by transferring the transfer layer included in the thermal transfer sheet onto the adhesive layer included in the laminate.

In one embodiment, the thermal transfer sheet that can be used for manufacturing the card of the present invention is a protective layer thermal transfer sheet including a back surface layer, a base material, and a protective layer as a transfer layer in this order. Further, the thermal transfer sheet may be provided with a release layer between the base material and the protective layer, and the release layer is included in the transfer layer.

Further, in one embodiment, the thermal transfer sheet that can be used for manufacturing the card of the present invention is an intermediate transfer recording medium including a back surface layer, a base material, and an information recording layer as a transfer layer in this order. Further, the thermal transfer sheet may be provided with a protective layer between the base material and the information recording layer. Further, the thermal transfer sheet may include a release layer between the base material and the information recording layer or the protective layer. The protective layer and the peeling layer are also included in the transfer layer.

The back layer may contain (meth) acrylic resin, vinyl resin, polyester resin, polyurethane resin, cellulose resin, polyamide resin, acetal resin, polycarbonate resin and the like.

Further, the back layer may contain waxes, higher fatty acid amides, metal soaps, silicone oils, surfactants and the like for the purpose of improving slipperiness.

The thickness of the back layer is not particularly limited, and may be, for example, 0.1 μm or more and 5 μm or less.

Examples of the base material include coated paper, printing paper, paper materials such as high-quality paper and kraft paper, polyester resin, polyamide resin, polyolefin resin, vinyl resin, (meth) acrylic resin, and polyimide resin. A film composed of a cellulose-based resin, a polystyrene-based resin, a polycarbonate-based resin, an ionomer-based resin, or the like can be used.
Further, the above-mentioned laminated body of the resin film can also be used as a base material.

The thickness of the base material is not particularly limited, and can be, for example, 2.5 μm or more and 100 μm or less.

The protective layer, the peeling layer, and the information recording layer provided in the thermal transfer sheet are as described above.

Further, the method for manufacturing a card of the present invention includes, when the laminated body includes a peeling base material, a step of heating and pressurizing and laminating the base material or a step of peeling off the peeling base material before transferring the transfer layer. ..

Further, in one embodiment, the method for producing a card of the present invention includes a step of forming an image on the front adhesive layer and the back adhesive layer after the front peeling base material and the back peeling base material are peeled off. The image can be formed by the above-mentioned conventionally known method.

Further, in one embodiment, the method for manufacturing a card of the present invention includes a step of punching into a desired card shape by a conventionally known method.

Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.

Example 1
A PET film having a thickness of 188 μm was prepared as a front peeling base material and a back peeling base material.

A 3 μm-thick surface adhesive layer made of a vinyl chloride-vinyl acetate copolymer (Solvine C (registered trademark) manufactured by Nisshin Chemical Industry Co., Ltd.) and a surface adhesive layer on one surface of the front peeling base material and the back peeling base material. A back adhesive layer was formed.

A moisture-curable hot-melt adhesive was applied onto the front-adhesive layer and the back-adhesive layer formed as described above, and then an inlet was placed on the surface-adhesive layer.

After arranging the inlet, the above two laminated bodies were heated and pressed so that the front adhesive layer and the back adhesive layer faced each other to obtain the laminated body of the present invention. At this time, the heating temperature was 90 ° C. The thickness of the card core layer in which the inlet was housed was 400 μm.

Example 2
Laminated in the same manner as in Example 1 except that the vinyl chloride-vinyl acetate copolymer used for forming the adhesive layer was changed to PVB (Sekisui Chemical Co., Ltd., Eslek (registered trademark) BL-S). The body was made.

Example 3
The same as in Example 1 except that the vinyl chloride-vinyl acetate copolymer used for forming the adhesive layer was changed to an acrylic resin (Dianal (registered trademark) BR-83 manufactured by Mitsubishi Chemical Corporation). To prepare a laminated body.

<< Image formation ease test >>
The surface peeling base material contained in the laminate obtained in the above example was peeled off, and an image was formed on the exposed surface adhesive layer by thermal transfer. The formed images were visually observed, evaluated according to the following evaluation criteria, and shown in Table 1.
(Evaluation criteria)
A: No defects such as uneven printing or omission of printing were observed, and a good image was obtained.
B: An image with no problem in practical use was obtained, although uneven printing and omission of printing were slightly observed.
NG: Problems such as uneven printing and omission of printing were observed in the image.

<< Adhesive test >>
The front peeling base material and the back peeling base material provided in the laminate obtained in the above example were peeled off. A card (laminated film / high-quality paper) is obtained by superimposing a 150 μm-thick high-quality paper and a 250 μm-thick laminated film on the front adhesive layer and the back adhesive layer as the front and back substrates and heating and pressurizing them. / Front adhesive layer / Card core layer / Back adhesive layer / Woodfree paper / Laminated film) was produced. At this time, the heating temperature was set to 100 ° C.
The surface substrate of the produced card was manually peeled off. The adhesiveness of the table substrate to the card core layer was evaluated according to the following evaluation criteria, and is shown in Table 1.
(Evaluation criteria)
A: The adhesiveness between the surface base material and the card core layer was very high, and a part of the card core layer was also peeled off by peeling off the surface base material.
B: The adhesiveness between the surface base material and the card core layer was high, and it was difficult to peel off the surface base material.
NG: The adhesiveness between the surface base material and the card core layer was low, and the surface base material could be easily peeled off.

10: Laminate, 11: Front adhesive layer, 12: Inlet, 13: Card core layer, 14: Back adhesive layer, 15: Front peeling base material, 16: Back peeling base material, 17: Inlet base material, 18: IC Chip, 19: Antenna, 20: Reinforcing plate, 21: Card, 22: Front base material, 23: Back base material, 24: Pre-printing layer, 25: Front transfer layer, 26: Back transfer layer, 27: Protective layer, 28: Peeling layer

Claims (10)

A front adhesive layer, a card core layer containing an inlet, and a back adhesive layer are provided in this order.
A laminate, wherein the card core layer contains a hot melt adhesive, the front adhesive layer is in contact with the hot melt adhesive, and the back adhesive layer is in contact with the hot melt adhesive . .. A front peeling base material, a front adhesive layer, a card core layer containing an inlet, a back adhesive layer, and a back peeling base material are provided in this order.
The card core layer contains a hot melt adhesive, the front adhesive layer is in contact with the hot melt adhesive, and the back adhesive layer is in contact with the hot melt adhesive.
A laminate, characterized in that the front adhesive layer and the back adhesive layer remain on the card core layer side when the front peeling base material and the back peeling base material are peeled off. 2. The release layer is further provided between at least one of the layers between the front peeling base material and the front adhesive layer, and between the back peeling base material and the back adhesive layer. The laminate described in. The laminate according to any one of claims 1 to 3, wherein the thickness of the front adhesive layer and the back adhesive layer is 1 μm or more and 10 μm or less. The laminate according to any one of claims 1 to 4, wherein at least one of the front adhesive layer and the back adhesive layer contains a vinyl chloride-vinyl acetate copolymer. A card produced by the laminate according to any one of claims 1 to 5.
A card, characterized in that the front base material, the front adhesive layer, the card core layer, the back adhesive layer, and the back base material are provided in this order. The sixth aspect of claim 6 further comprises a pre-printing layer between at least one of the front substrate and the front adhesive layer, and between the back substrate and the back adhesive layer. Card. A card produced by the laminate according to any one of claims 1 to 4.
A card characterized in that a front transfer layer, the front adhesive layer, the card core layer, the back adhesive layer, and the back transfer layer are provided in this order. The card according to claim 8, wherein at least one of the front transfer layer and the back transfer layer includes a protective layer. The card according to claim 8 or 9, wherein at least one of the front transfer layer and the back transfer layer includes a peeling layer and a protective layer in this order.

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