Information laminate, laminate and oversheet

Abstract

To provide an IC card having a high antibacterial function or an antiviral function.SOLUTION: An IC card 10 comprises a built-in antenna layer 12, core layers 13a and 13b, and oversheet layers 14a and 14b. The oversheet layers 14a and 14b have a middle layer 4, and a pair of first antibacterial layers 5 and 6.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to information laminates such as various plastic cards made of a laminate including an IC module, such as credit cards, cash cards, and ID cards, or passports made of a laminate including an IC module, and in particular to information laminates, laminates, and oversheets having antibacterial or antiviral functions. [Background technology]

[0002] In recent years, various plastic cards containing IC modules, such as credit cards, cash cards, ID cards, and customer loyalty cards, have been adopted in a variety of fields and industries. In particular, customer loyalty cards issued by department stores, supermarkets, shopping malls, etc., require increased hygiene precautions because cashiers may hold the cards in their hands, perform necessary procedures, and then return them to the customer. For this reason, antibacterial cards have been developed in recent years, in which an antibacterial agent with high antibacterial properties against mold and other bacteria is incorporated into at least the surface substrate of the card.

[0003] Antibacterial properties are also required for passports that contain IC modules. The part of the passport booklet that contains the IC module is generally called the data page.

[0004] Furthermore, in recent years, cards and passports are being required to have not only antibacterial but also antiviral functions. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2000-71658 [Patent Document 2] Patent Publication No. 2000-71659 Summary of the Invention [Problem to be solved by the invention]

[0006] The present disclosure has been made in consideration of these points, and aims to provide an information laminate having high antibacterial or antiviral functionality, a laminate having high antiviral functionality, and an over-sheet having high antiviral functionality. [Means for solving the problem]

[0007] The present disclosure relates to an information laminate having an IC module built in, comprising: an antenna-built-in layer having a built-in antenna connected to the IC module; a pair of core layers provided on both sides of the antenna-built-in layer; and an over-sheet layer provided on the outer surface of at least one of the core layers so as to be positioned on the outermost surface of the information laminate, the over-sheet layer having a middle layer and a first antibacterial or antiviral layer provided on either side of the middle layer and containing an antibacterial or antiviral agent.

[0008] The present disclosure is an information laminate in which the IC module is provided in the built-in antenna layer.

[0009] The present disclosure is an information laminate in which the IC module is exposed to the outside of the information laminate.

[0010] The present disclosure is an information laminate, wherein the first antibacterial or antiviral layer contains a boron-based compound as an antibacterial agent.

[0011] The present disclosure relates to an information laminate, in which the middle layer of the over-sheet layer is made of a laser light coloring layer that develops color when irradiated with laser light.

[0012] The present disclosure relates to an information laminate in which a second antibacterial or antiviral layer containing an antibacterial or antiviral agent is provided so as to be located on the outermost surface of the information laminate opposite the first antibacterial or antiviral layer.

[0013] The present disclosure relates to an information laminate in which a concealing layer and a picture-printed layer are provided in this order from the inside to the outside inside the second antibacterial or antiviral layer.

[0014] The present disclosure relates to an information laminate having an IC module built in, the information laminate comprising: an antenna-built-in layer having a built-in antenna connected to the IC module; a pair of core layers provided on both sides of the antenna-built-in layer; and a third antibacterial or antiviral layer containing an antibacterial or antiviral agent provided on the outer surface of at least one of the core layers so as to be positioned on the outermost surface of the information laminate.

[0015] The present disclosure is a card having the above-described information laminate.

[0016] The present disclosure is a booklet having the above-described information laminate.

[0017] The present disclosure relates to a laminate comprising a core body and an over-sheet layer provided on at least one outer surface of the core body, wherein a first antiviral layer consisting of a coating layer containing an antiviral agent is provided on the outer surface of the over-sheet layer.

[0018] The present disclosure relates to a laminate further comprising an IC module, wherein the core body has a pair of core layers, and an antenna-embedded layer having an antenna connected to the IC module embedded therein is provided between the pair of core layers.

[0019] In the present disclosure, the IC module is a laminate provided in the built-in antenna layer.

[0020] The present disclosure is a laminate in which the IC module is exposed to the outside of the laminate.

[0021] The present disclosure relates to a laminate in which a second antiviral layer containing an antiviral agent is provided so as to be located on the outermost surface of the laminate opposite to the first antiviral layer.

[0022] The present disclosure relates to a laminate in which a concealing layer and a picture-printed layer are provided in this order from the inside to the outside on the inside of the second antiviral layer.

[0023] The present disclosure is a laminate comprising a core body and a third antiviral layer containing an antiviral agent, the third antiviral layer being provided on at least one outer surface of the core body and positioned on the outermost surface of the laminate.

[0024] The present disclosure is a card having a laminate.

[0025] The present disclosure is a booklet having a laminate.

[0026] The present disclosure relates to an over-sheet body including an over-sheet layer and a first antiviral layer formed on one surface of the over-sheet layer and consisting of a coating layer containing an antiviral agent. [Effects of the Invention]

[0027] As described above, according to the present disclosure, it is possible to provide an information laminate having a high antibacterial function or a high antiviral function, a laminate having a high antiviral function, and an oversheet having a high antiviral function. [Brief explanation of the drawings]

[0028] [Figure 1] FIG. 1 is a side cross-sectional view of an IC card showing a first embodiment. [Figure 2] Figure 2 is a schematic diagram showing an IC module. [Figure 3] Figure 3 shows the connection relationship between the IC module and the antenna. [Figure 4] FIG. 4 is a cross-sectional side view showing the oversheet layer. [Figure 5] FIG. 5 is a plan view showing an IC card. [Figure 6A] FIG. 6A is a side cross-sectional view of an IC card showing a second embodiment. [Figure 6B] FIG. 6B is a side cross-sectional view showing an IC card when irradiated with laser light. [Figure 7] FIG. 7 is a cross-sectional view showing the oversheet layer. [Figure 8] FIG. 8 is a side cross-sectional view of an IC card showing a third embodiment. [Figure 9] FIG. 9 is a side cross-sectional view of an IC card showing a fourth embodiment. [Figure 10] FIG. 10 is a side cross-sectional view of an IC card showing a fifth embodiment. [Figure 11] FIG. 11 is a side cross-sectional view of an IC card showing a seventh embodiment. [Figure 12] FIG. 12 is a side cross-sectional view showing the over-sheet layer on the back side. [Figure 13] FIG. 13 is a side cross-sectional view of an IC card showing an eighth embodiment. [Figure 14] FIG. 14 is a side cross-sectional view of an IC card showing a ninth embodiment. [Figure 15] FIG. 15 is a side cross-sectional view of a card showing a tenth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0029] First Embodiment The first embodiment will be described below with reference to the drawings.

[0030] 1 to 5 are diagrams showing a first embodiment of the present disclosure. First, referring to Fig. 5, an IC card 10 incorporating an information laminate incorporating an IC module will be described as an example of an information laminate incorporating an IC module. Note that the information laminate incorporating an IC module is not limited to the IC card 10, and may be incorporated in a passport (booklet).

[0031] 5, IC card 10 has an IC module 20 built in, and this IC module 20 is exposed on the surface of IC card 10. In this embodiment, IC card 10 is a dual-interface IC card that is both contact and contactless.

[0032] As will be described later, the IC card 10 includes a magnetic recording section 19, and a picture print 16A appears on the surface of the IC card 10.

[0033] Next, an IC card 10 constituting an information laminate with a built-in IC module will be described with reference to FIGS.

[0034] The IC card 10 has a laminated structure 10A including an IC module 20. The IC card 10 including such a laminated structure 10A includes an antenna-containing layer 12 that contains an antenna 25 connected to the IC module 20, a pair of core layers 13a and 13b provided on both sides of the antenna-containing layer 12, and a pair of over-sheet layers 14a and 14b provided on both sides of each of the core layers 13a and 13b.

[0035] Of these, the antenna-built-in layer 12 includes an antenna mounting layer 12b on which an antenna 25 is mounted, and an antenna cover layer 12a that covers the antenna 25 on the antenna mounting layer 12b.

[0036] Further, of the pair of over-sheet layers 14a, 14b, a concealing layer 15 is provided on the over-sheet layer 14a on the surface side, a picture print layer 16 located on the concealing layer 15 and including a picture print 16A, and a peel-off layer 17 made of a transparent body located on the picture print layer 16.

[0037] Further, a magnetic recording portion 19 is provided on the over-sheet layer 14a on the front side and the over-sheet layer 14b on the back side, and the magnetic recording portion 19 on the front side is covered with a concealing layer 15 so that it cannot be seen from the outside.

[0038] A recess 30 is formed on the surface of the laminated structure 10A having such a configuration, and the above-mentioned IC module 20 is mounted in this recess 30 to obtain the IC card 10. Note that although the recess 30 in Figure 1 is shown as having a wide space (gap) between the IC module 20 and each layer, in reality there is almost no gap. The same applies to the gaps in Figures 6A and 6B described below.

[0039] Next, the IC module 20 mounted in the recess 30 of the laminated structure 10A will be described.

[0040] The IC module 20 has a substrate 21 and an IC chip 22a provided on the substrate 21. The IC chip 22a is covered with a sealing resin 22b. The IC chip 22a and the sealing resin 22b constitute an IC chip body 22 (see FIG. 2).

[0041] The IC module 20 having such a structure is mounted in the recess 30, and is connected to an antenna 25 built into the antenna-built-in layer 12. In this case, a conductive plate 28 is provided on the antenna mounting layer 12b, and the IC module 20 is connected to the antenna 25 via conductive paste 27 and the conductive plate 28. In this case, a conductive film may be used instead of the conductive paste 27. Figure 3 shows the connection relationship between the IC module 20 and the IC module 20. Here, the antenna 25 is sandwiched between the antenna mounting layer 12b and the antenna cover layer 12a as described above, and is made of copper.

[0042] Next, the over-sheet layers 14a and 14b will be described. Since the over-sheet layers 14a and 14b have substantially the same structure, only the over-sheet layer 14a on the surface side will be described here.

[0043] As shown in FIG. 4, the over-sheet layer 14a has an intermediate layer 4 and a pair of first antibacterial layers 5 and 6 provided on both sides of the intermediate layer and having an antibacterial agent kneaded therein.

[0044] Of these, the middle layer 4 contains transparent polycarbonate (PC). Furthermore, the pair of first antibacterial layers 5, 6 each contain transparent polyethylene terephthalate (PETG). By forming the pair of first antibacterial layers 5, 6 from PETG in this way, each of the first antibacterial layers 5, 6 can be more effectively adhered to the middle layer 4. Furthermore, the pair of first antibacterial layers 5, 6 each contain transparent polyethylene terephthalate (PETG). PETG is less hard and less heat-resistant than PC, making it less susceptible to heat and pressure transfer. This allows for easy hologram transfer and embossing of the manufactured IC card 10.

[0045] The over-sheet layer 14a, which includes the middle layer 4 and the pair of first antibacterial layers 5 and 6, is produced by co-extrusion of two types of three layers, and has an overall thickness of 50 μm. The thickness ratio of the first antibacterial layer 5, the middle layer 4, and the first antibacterial layer 6 is 1:2:1, i.e., 12.5 μm:25 μm:12.5 μm.

[0046] The middle layer 4 of the over-sheet layer 14a and the first antibacterial layers 5 and 6 may all be made of polycarbonate (PC).

[0047] Thus, the over-sheet layer 14a, which includes the middle layer 4 and the pair of first antibacterial layers 5, 6, is configured to be thin at 50 μm overall, and the antibacterial agent is kneaded only into the pair of antibacterial layers 5, 6. The kneaded antibacterial agent may be in the form of fine particles or particles, for example. This allows the pair of first antibacterial layers 5, 6 to be made thinner, which makes the antibacterial agent kneaded into the first antibacterial layers 5, 6 more likely to appear on the outer surface than if it were kneaded into an antibacterial layer configured to be thick, thereby further enhancing the antibacterial function of the pair of first antibacterial layers 5, 6.

[0048] In this way, a predetermined amount of antibacterial agent is kneaded into the antibacterial layers 5, 6 of the over-sheet layer 14a. One method for manufacturing such antibacterial layers 5, 6 is to mix and stir a predetermined amount of antibacterial agent with the resin that will be used to form the over-sheet layer using a mixer such as a Henschel mixer or a V-blender, and then melt-knead the resulting resin composition using a single-screw extruder, twin-screw extruder, Valley mixer, co-kneader, or roll, and then mold the resulting resin composition into a sheet. The antibacterial agent may also be incorporated into the resin when the resin is polymerized. In any case, the amount of antibacterial agent mixed into the resin should be approximately 0.1 to 12% by weight.

[0049] The antibacterial agent used in the present disclosure is not particularly limited as long as it is a substance that can inhibit bacterial growth, and general antibacterial agents can be used. Examples include organic antibacterial agents, inorganic antibacterial agents, and photocatalytic antibacterial agents. These antibacterial agents may also be used in combination. Antibacterial agents include organic and inorganic antibacterial agents, with inorganic antibacterial agents being particularly suitable for practical use in terms of the durability of the antibacterial effect, processability, etc. Examples of inorganic antibacterial agents that can be used include boron-based compounds, as well as silver-based inorganic antibacterial agents, copper-based inorganic antibacterial agents, and zinc-based inorganic antibacterial agents. There are no particular limitations on the silver-based inorganic antibacterial agent as long as it is an inorganic compound that supports silver ions. Specific examples include inorganic adsorbents such as activated carbon, activated alumina, and silica gel, and inorganic ion exchangers such as zeolite, apatite, hydroxyapatite, zirconium phosphate, titanium phosphate, and potassium titanate that support silver ions. In addition, glass, ceramic, calcium silicate, titanium oxide, etc. can also be used by supporting silver ions.

[0050] The copper-based inorganic antibacterial agent is not particularly limited as long as it is an inorganic compound that supports copper ions, and specific examples include inorganic adsorbents such as activated carbon, activated alumina, and silica gel, and inorganic ion exchangers such as zeolite, apatite, hydroxyapatite, zirconium phosphate, titanium phosphate, and potassium titanate that support copper ions. In addition, glass, ceramics, calcium silicate, titanium oxide, and the like can also be used by supporting copper ions.

[0051] The same applies to zinc-based inorganic antibacterial agents. In addition to these, it is also possible to use solid solutions of zinc, copper, aluminum, etc., which are effective as antibacterial agents, in hydroxides or oxides of calcium or magnesium.

[0052] Among these, antibacterial agents made from boron-based compounds are known to have high antibacterial properties. Furthermore, silver-based inorganic antibacterial agents are the safest. In the case of zeolite, antibacterial zeolites are used that are obtained by substituting some of the ion-exchangeable metals in zeolite with at least one metal selected from silver, copper, and zinc. The selection of these antibacterial agents is based on consideration of their compatibility with the resin that will be used to make the oversheet. This is because, depending on the combination, a chemical reaction may cause the oversheet to turn black or brown. (For example, the reaction between chlorine and metal in vinyl chloride.) The resin that is the material for the built-in antenna layer 12 consisting of the antenna mounting layer 12b and the antenna cover layer 12a, and the pair of core layers 13a, 13b is not particularly limited, but specific examples include synthetic resins such as polyvinyl chloride resin, vinyl acetate resin, vinyl chloride-vinyl acetate copolymer resin, butadiene resin, acrylonitrile-butadiene-styrene copolymer resin, polycarbonate resin, polyamide resin, cellulose resin, polyester, polyolefins such as polyethylene and polypropylene, polyvinyl alcohol, acrylic resin, polymethyl methacrylate resin, styrene resin, urethane resin, fluororesin, and mixtures thereof.

[0053] As described above, the concealing layer 15, the picture printed layer 16, and the release layer 17 are provided on the over-sheet layer 14a on the surface side in this order from the inside to the outside.

[0054] In this embodiment, the concealing layer 15 includes, for example, silver, black, gold, or red, and the silver concealing layer is made of aluminum.

[0055] The picture print layer 16 is obtained by applying ink to form a picture print 16 A. Although the picture print layer 16 in Fig. 1 is a solid print on the entire surface of the layer, the picture print layer 16 may also be a partial print such as the picture print 16 A in Fig. 5.

[0056] The above-mentioned concealing layer 15 and picture printing layer 16 are provided in advance on a transfer sheet substrate (not shown) via a peeling layer 17, and the concealing layer 15 and picture printing layer 16 are formed on the over-sheet layer 14a by transferring the concealing layer 15 and picture printing layer 16 on the transfer sheet substrate together with the peeling layer 17 onto the over-sheet layer 14a on the surface side.

[0057] In this embodiment, the release layer 17 is made of a transparent material and is obtained from ink that has an antibacterial agent kneaded in. Among these, inks that form the release layer may have the following composition. Resin 1 (acrylic resin) content: 20-30%, Resin 2 (vinyl chloride-vinyl acetate resin) content: 5% or less, Resin 3 (polyester resin) content: 1% or less, UV absorber content: 2% or less, Methyl ethyl ketone content: 30-40%, Toluene (300) content: 34.0-36.0%, Polyethylene wax content: 1% or less.

[0058] Silver oxide-zinc calcium phosphate can be used as the antibacterial agent in the release layer 17. Other antibacterial agents that can be used in the release layer 17 include those similar to those kneaded into the first antibacterial layers 5 and 6 of the over-sheet layers 14a and 14b.

[0059] In this embodiment, the release layer 17 is located on the outermost surface of the front side, and the first antibacterial layer 5 of the back side over-sheet layer 14b is located on the outermost surface of the back side.

[0060] Therefore, release layer 17 located on the outermost surface on the front side can also be called a second antibacterial layer, in contrast to first antibacterial layer 5 located on the outermost surface on the back side. [Example]

[0061] Next, an example of this embodiment will be described.

[0062] The IC card 10 according to this embodiment was subjected to an antibacterial test in accordance with JIS Z 2801 using Escherichia coli.

[0063] A release layer 17 serving as a second antibacterial layer is formed on the outermost surface of the front side of the IC card 10, and a first antibacterial layer 5 of an over-sheet layer 14b is formed on the outermost surface of the back side.

[0064] As a result of the antibacterial test, the antibacterial activity value on the front side was 6.5, and on the back side was 3.1. Both the front and back sides of the IC card 10 exceeded the standard value of 2.0 for antibacterial effectiveness.

[0065] As described above, according to this embodiment, the release layer 17, which serves as the second antibacterial layer, is formed on the surface side of the IC card 10. Because the release layer 17 is a sufficiently thin layer (0.1 to 2.0 μm), the antibacterial agent in the release layer 17 easily appears on the outer surface, thereby enabling the antibacterial agent to exhibit a high antibacterial function.

[0066] On the back side of the IC card 10, the over-sheet layer 14b includes a middle layer 4 and a pair of first antibacterial layers 5, 6, of which the first antibacterial layers 5, 6 are thin (12.5 μm). Therefore, the antibacterial agent in the first antibacterial layer 5 located on the back side of the IC card 10 can easily appear on the outer surface, thereby achieving high antibacterial function.

[0067] In addition, the over-sheet layers 14a, 14b have a middle layer 4 made of polycarbonate and a pair of antibacterial layers 5, 6 made of polyethylene terephthalate, and the polycarbonate middle layer 4 can give the over-sheet layers 14a, 14b appropriate strength.

[0068] In addition, the over-sheet layers 14a, 14b are structured so that the middle layer 4 is sandwiched between a pair of antibacterial layers 5, 6, allowing for a symmetrical layer structure centered on the middle layer 4, and no warping occurs in the over-sheet layers 14a, 14b.

[0069] Moreover, because the over-sheet layers 14a, 14b have a symmetrical layer structure with the middle layer 4 at the center, when manufacturing the IC card 10 using the over-sheet layers 14a, 14b, accuracy in the front and back sides is not required, and problems such as accidentally stacking the front and back sides together do not occur, making it easy to manufacture the IC card 10. Note that the over-sheet layers 14a, 14b are not limited to those having a symmetrical layer structure with the middle layer 4 at the center, and may be composed of the middle layer 4 and, for example, a first antibacterial layer 5 provided on one side of the middle layer 4. Furthermore, of the over-sheet layers 14a, 14b, the over-sheet layer 14a does not necessarily have to be provided, and only the over-sheet layer 14b may be provided.

[0070] <Second embodiment> The second embodiment will be described below with reference to the drawings.

[0071] 6A, 6B and 7 are diagrams showing a second embodiment of the present disclosure.

[0072] The second embodiment shown in Figures 6A, 6B and 7 differs only in the structure of the over-sheet layer, and other configurations are the same as those of the first embodiment shown in Figures 1 to 5. In the second embodiment shown in Figures 6A, 6B and 7, the same parts as those in the first embodiment shown in Figures 1 to 5 are designated by the same reference numerals, and detailed description thereof will be omitted.

[0073] In this embodiment, the IC card 10 is a dual interface IC card that is both contact and non-contact type.

[0074] The IC card 10 has a laminated structure 10A including an IC module 20. The IC card 10 including such a laminated structure 10A includes an antenna-containing layer 12 that contains an antenna 25 connected to the IC module 20, a pair of core layers 13a and 13b provided on both sides of the antenna-containing layer 12, and a pair of over-sheet layers 34a and 34b provided on both sides of each of the core layers 13a and 13b.

[0075] Of these, the antenna-built-in layer 12 includes an antenna mounting layer 12b on which the antenna 25 is mounted, and an antenna cover layer 12a that covers the antenna 25 on the antenna mounting layer 12b. In this case, a conductive plate 28 is provided on the antenna mounting layer 12b, and the IC module 20 is connected to the antenna 25 via a conductive paste 27 and the conductive plate 28. In this case, a conductive film may be used instead of the conductive paste 27.

[0076] Further, of the pair of over-sheet layers 34a, 34b, a concealing layer 15 is provided on the surface side over-sheet layer 34a, a picture print layer 16 located on the concealing layer 15 and including a picture print 16A, and a peel-off layer 17 made of a transparent body located on the picture print layer 16.

[0077] Further, the over-sheet layer 34a on the front side and the over-sheet layer 34b on the back side are provided with a magnetic recording section 19, and the magnetic recording section 19 on the front side is covered with a concealing layer 15 so that it cannot be seen from the outside.

[0078] A recess 30 is formed on the surface side of the laminated structure 10A having such a configuration, and the IC module 20 described above is mounted in this recess 30, thereby obtaining the IC card 10.

[0079] Next, the over-sheet layers 34a and 34b will be described. Since the over-sheet layers 34a and 34b have substantially the same structure, only the over-sheet layer 34a on the surface side will be described here.

[0080] As shown in FIG. 7, the over-sheet layer 34a has an intermediate layer 4A and a pair of first antibacterial layers 5, 6 provided on both sides of the intermediate layer and having an antibacterial agent kneaded therein.

[0081] Of these, the middle layer 4A contains transparent polycarbonate (PC), and the pair of first antibacterial layers 5, 6 each contain transparent polyethylene terephthalate (PETG). By forming the pair of first antibacterial layers 5, 6 from PETG in this way, each of the first antibacterial layers 5, 6 can be more effectively adhered to the middle layer 4A.

[0082] The over-sheet layer 34a, which includes the middle layer 4A and the pair of first antibacterial layers 5 and 6, is produced by co-extrusion of three layers of two kinds of materials, and has an overall thickness of 50 μm. The thickness ratio of the first antibacterial layer 5, the middle layer 4A, and the first antibacterial layer 6 is 1:2:1, i.e., 12.5 μm:25 μm:12.5 μm.

[0083] The middle layer 4A of the over-sheet layer 34a and the first antibacterial layers 5 and 6 may all be made of polycarbonate (PC).

[0084] Thus, the over-sheet layer 34a, which includes the middle layer 4A and the pair of first antibacterial layers 5, 6, is configured to be thin at 50 μm overall, and an antibacterial agent is kneaded only into the pair of antibacterial layers 5, 6. The kneaded antibacterial agent may be in the form of fine particles or particles, for example. This allows the pair of first antibacterial layers 5, 6 to be made thinner, which makes the antibacterial agent kneaded into the first antibacterial layers 5, 6 more likely to appear on the outer surface than if it were kneaded into an antibacterial layer configured to be thick, thereby further enhancing the antibacterial function of the pair of first antibacterial layers 5, 6.

[0085] The middle layer 4A contains polycarbonate as described above, and also contains a laser light coloring accelerator that changes color and turns black when irradiated with laser light, thereby displaying the desired characters. Therefore, the middle layer 4A is a laser light coloring layer that changes color when irradiated with laser light.

[0086] In FIG. 6A, when a laser beam is irradiated from the front side of IC card 10, the laser beam irradiated onto IC card 10 passes through transparent peeling layer 17, heating and melting the peeling layer 17, picture-printed layer 16, and concealing layer 15, causing them to fly away (see FIG. 6B). Next, the laser beam passes through antibacterial layer 6 of oversheet layer 34a and reaches middle layer 4A. When middle layer 4A is irradiated with the laser beam, the laser beam color development accelerator in middle layer 4A acquires thermal energy. In this case, the carbon contained in the polycarbonate (middle layer 4A) in contact with the laser beam color development accelerator burns and turns black, allowing characters to be displayed. Here, FIG. 6B is a side cross-sectional view of IC card 10 when laser beam is irradiated. As shown in FIG. 6B, when IC card 10 is irradiated with laser beam, portions of peeling layer 17, picture-printed layer 16, and concealing layer 15 are heated, melted, and scattered, forming openings 50 in peeling layer 17, picture-printed layer 16, and concealing layer 15. The characters formed by the blackening of the middle layer 4A of the over-sheet layer 34a are displayed to the outside through the opening 50. In this case, the first antibacterial layer 5 or 6 of the over-sheet layer 34a is exposed to the outside through the opening 50, but because the first antibacterial layer 5, 6 has an antibacterial function, the antibacterial function can also be maintained in the opening 50 of the IC card 10. [Example]

[0087] Next, an example of this embodiment will be described.

[0088] The IC card 10 according to this embodiment was subjected to an antibacterial test in accordance with JIS Z 2801 using Escherichia coli.

[0089] A release layer 17 that serves as a second antibacterial layer is formed on the front side of the IC card 10, and a first antibacterial layer 5 of the over-sheet layer 34b is formed on the back side.

[0090] As a result of the antibacterial test, the antibacterial activity value on the front side was 6.5, and on the back side was 3.0. Both the front and back sides of the IC card 10 exceeded the standard value of 2.0 for antibacterial effectiveness.

[0091] As described above, according to this embodiment, the release layer 17, which serves as the second antibacterial layer, is formed on the surface side of the IC card 10. Because the release layer 17 is a sufficiently thin layer (0.1 to 2.0 μm), the antibacterial agent in the release layer 17 easily appears on the outer surface, thereby enabling the antibacterial agent to exhibit a high antibacterial function.

[0092] On the back side of the IC card 10, the over-sheet layer 34b includes a middle layer 4A and a pair of first antibacterial layers 5, 6, of which the first antibacterial layers 5, 6 are thin (12.5 μm). Therefore, the antibacterial agent in the first antibacterial layer 5 located on the back side of the IC card 10 can easily appear on the outer surface, thereby achieving high antibacterial function.

[0093] In addition, the over-sheet layers 34a, 34b have a middle layer 4A made of polycarbonate and a pair of antibacterial layers 5, 6 made of polyethylene terephthalate, and the polycarbonate middle layer 4A can provide the over-sheet layers 34a, 34b with appropriate strength.

[0094] In addition, the over-sheet layers 34a, 34b are structured so that the middle layer 4A is sandwiched between a pair of antibacterial layers 5, 6, allowing for a symmetrical layer structure centered on the middle layer 4A, and no warping occurs in the over-sheet layers 34a, 34b.

[0095] Moreover, because the over-sheet layers 34a, 34b have a symmetrical layer structure with the middle layer 4A at the center, when the over-sheet layers 34a, 34b are used to produce the IC card 10, accuracy in the front and back is not required, and the IC card 10 can be easily produced. Note that the over-sheet layers 34a, 34b are not limited to having a symmetrical layer structure with the middle layer 4A at the center, and may be composed of the middle layer 4A and, for example, a first antibacterial layer 5 provided on one side of the middle layer 4A. Furthermore, of the over-sheet layers 34a, 34b, the over-sheet layer 34a does not necessarily have to be provided, and only the over-sheet layer 34b may be provided.

[0096] <Third embodiment> The third embodiment will be described below with reference to the drawings.

[0097] FIG. 8 is a diagram illustrating a third embodiment of the present disclosure.

[0098] In the third embodiment shown in FIG. 8, the same parts as those in the first embodiment shown in FIGS. 1 to 5 are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0099] As shown in Fig. 8, IC card 10 has an IC module 20 built in, and this IC module 20 is disposed inside IC card 10. In this embodiment, IC card 10 is a contactless IC card. Currently, FeliCa, Type A, and Type B types are commonly known as contactless communication methods, and the contactless IC card of the present application can appropriately adopt the communication method of each of the three types described above.

[0100] The IC card 10 has a laminated structure 10A including an IC module 20. The IC card 10 including such a laminated structure 10A includes an antenna-containing layer 12 that contains an antenna 25 connected to the IC module 20, a pair of core layers 13a and 13b provided on both sides of the antenna-containing layer 12, and a pair of over-sheet layers 14a and 14b provided on both sides of each of the core layers 13a and 13b.

[0101] Of these, the antenna-built-in layer 12 includes an antenna mounting layer 12b on which an antenna 25 is mounted, and an antenna cover layer 12a that covers the antenna 25 on the antenna mounting layer 12b.

[0102] Further, of the pair of over-sheet layers 14a, 14b, a concealing layer 15 is provided on the over-sheet layer 14a on the surface side, a picture print layer 16 located on the concealing layer 15 and including a picture print 16A, and a peel-off layer 17 made of a transparent body located on the picture print layer 16.

[0103] Further, a magnetic recording portion 19 is provided on the over-sheet layer 14a on the front side and the over-sheet layer 14b on the back side, and the magnetic recording portion 19 on the front side is covered with a concealing layer 15 so that it cannot be seen from the outside.

[0104] 8, an opening 31 is formed in the antenna mounting layer 12b and the antenna cover layer 12a that constitute the built-in-antenna layer 12, and the IC module 20 is mounted in this opening 31. Although the opening 31 appears to have a wide space (gap) in the drawing, in reality there is almost no space. The same is true for the opening 31 in FIGS. 9 and 10, which will be described later.

[0105] The IC module 20 mounted in the opening 31 is connected to the antenna 25 sandwiched between the antenna mounting layer 12b and the antenna cover layer 12a of the built-in-antenna layer 12. An intermediate layer 52a is interposed between the antenna cover layer 12a and the core layer 13a. An intermediate layer 52b is interposed between the antenna mounting layer 12b and the core layer 13b.

[0106] Next, the over-sheet layers 14a, 14a will be described. Since the over-sheet layers 14a, 14b have substantially the same structure, only the over-sheet layer 14a on the surface side will be described here.

[0107] The over-sheet layer 14a has an intermediate layer 4 and a pair of first antibacterial layers 5 and 6 provided on both sides of the intermediate layer and containing an antibacterial agent such as a boron-based compound (see FIG. 4).

[0108] Of these, the middle layer 4 contains a transparent polycarbonate (PC), and the pair of first antibacterial layers 5, 6 each contain a transparent polyethylene terephthalate (PETG). By forming the pair of first antibacterial layers 5, 6 from PETG in this way, each of the first antibacterial layers 5, 6 can be more effectively adhered to the middle layer 4.

[0109] The over-sheet layer 14a, which includes the middle layer 4 and the pair of first antibacterial layers 5 and 6, is produced by co-extrusion of two types of three layers, and has an overall thickness of 50 μm. The thickness ratio of the first antibacterial layer 5, the middle layer 4, and the first antibacterial layer 6 is 1:2:1, i.e., 12.5 μm:25 μm:12.5 μm.

[0110] The middle layer 4 of the over-sheet layer 14a and the first antibacterial layers 5 and 6 may all be made of polycarbonate (PC).

[0111] In this way, the over-sheet layer 14a, which includes the middle layer 4 and the pair of first antibacterial layers 5, 6, is configured to be thin as a whole at 50 μm, and the antibacterial agent is kneaded only into the pair of first antibacterial layers 5, 6. This allows the pair of first antibacterial layers 5, 6 to be made thinner, which makes the antibacterial agent kneaded into the first antibacterial layers 5, 6 more likely to appear on the outer surface than when the antibacterial agent is kneaded into an antibacterial layer configured to be thick, thereby further enhancing the antibacterial function of the pair of first antibacterial layers 5, 6.

[0112] As described above, the concealing layer 15, the picture printed layer 16, and the release layer 17 are provided on the over-sheet layer 14a on the surface side in this order from the inside to the outside.

[0113] In this embodiment, the concealing layer 15 includes, for example, silver, black, gold, or red, and the silver concealing layer is made of aluminum.

[0114] The picture print layer 16 is obtained by applying ink to form a picture print 16A.

[0115] The above-mentioned concealing layer 15 and picture printing layer 16 are provided in advance on a transfer sheet substrate (not shown) via a peeling layer 17, and the concealing layer 15 and picture printing layer 16 are formed on the over-sheet layer 14a by transferring the concealing layer 15 and picture printing layer 16 on the transfer sheet substrate together with the peeling layer 17 onto the over-sheet layer 14a on the surface side.

[0116] In this embodiment, the release layer 17 is made of a transparent material and contains an ink with an antibacterial agent kneaded in. The ink forming the release layer may have the following composition: Resin 1 (acrylic resin) content of 20 to 30%, Resin 2 (vinyl chloride-vinyl acetate resin) content of 5% or less, Resin 3 (polyester resin) content of 1% or less, UV absorber content of 2% or less, methyl ethyl ketone content of 30 to 40%, toluene (300) content of 34.0 to 36.0%, and polyethylene wax content of 1% or less.

[0117] Silver oxide-zinc calcium phosphate can be used as the antibacterial agent in the release layer 17. Other antibacterial agents that can be used in the release layer 17 include those similar to those kneaded into the first antibacterial layers 5 and 6 of the over-sheet layers 14a and 14b.

[0118] In this embodiment, the release layer 17 is located on the outermost surface of the front side, and the first antibacterial layer 5 of the back side over-sheet layer 14b is located on the outermost surface of the back side.

[0119] Therefore, release layer 17 located on the outermost surface on the front side can also be called a second antibacterial layer, in contrast to first antibacterial layer 5 located on the outermost surface on the back side. [Example]

[0120] Next, an example of this embodiment will be described.

[0121] The IC card 10 according to this embodiment was subjected to an antibacterial test in accordance with JIS Z 2801 using Escherichia coli.

[0122] A release layer 17 that serves as a second antibacterial layer is formed on the front side of the IC card 10, and a first antibacterial layer 5 of an over-sheet layer 14b is formed on the back side.

[0123] As a result of the antibacterial test, the antibacterial activity value on the front side was 6.5, and the antibacterial activity value on the back side was 3.2. Both the front side and back side of the IC card 10 exceeded the standard value of 2.0 for the antibacterial effect.

[0124] As described above, according to this embodiment, the release layer 17, which serves as the second antibacterial layer, is formed on the surface side of the IC card 10. Because the release layer 17 is a sufficiently thin layer (0.1 to 2.0 μm), the antibacterial agent in the release layer 17 easily appears on the outer surface, thereby enabling the antibacterial agent to exhibit a high antibacterial function.

[0125] On the back side of the IC card 10, the over-sheet layer 14b includes a middle layer 4 and a pair of first antibacterial layers 5, 6, of which the first antibacterial layers 5, 6 are thin (12.5 μm). Therefore, the antibacterial agent in the first antibacterial layer 5 located on the back side of the IC card 10 can easily appear on the outer surface, thereby achieving high antibacterial function.

[0126] In addition, the over-sheet layers 14a, 14b have a middle layer 4 made of polycarbonate and a pair of antibacterial layers 5, 6 made of polyethylene terephthalate, and the polycarbonate middle layer 4 can give the over-sheet layers 14a, 14b appropriate strength.

[0127] In addition, the over-sheet layers 14a, 14b are structured so that the middle layer 4 is sandwiched between a pair of antibacterial layers 5, 6, allowing for a symmetrical layer structure centered on the middle layer 4, and no warping occurs in the over-sheet layers 14a, 14b.

[0128] Moreover, since the over-sheet layers 14a, 14b have a symmetrical layer structure with the middle layer 4 at the center, when the over-sheet layers 14a, 14b are used to produce the IC card 10, accuracy in the front and back is not required, and the IC card 10 can be easily produced. Note that the over-sheet layers 14a, 14b are not limited to those having a symmetrical layer structure with the middle layer 4 at the center, and may be composed of the middle layer 4 and, for example, a first antibacterial layer 5 provided on one side of the middle layer 4. Furthermore, of the over-sheet layers 14a, 14b, the over-sheet layer 14a does not necessarily have to be provided, and only the over-sheet layer 14b may be provided.

[0129] <Fourth embodiment> The fourth embodiment will be described below with reference to the drawings.

[0130] FIG. 9 is a diagram illustrating a fourth embodiment of the present disclosure.

[0131] The fourth embodiment shown in Fig. 9 differs only in the configuration of the over-sheet layer, and other configurations are substantially the same as those of the third embodiment shown in Fig. 8. In the fourth embodiment shown in Fig. 9, the same parts as those of the third embodiment shown in Fig. 8 are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0132] 9, IC card 10 has built-in IC module 20, and this IC module 20 is disposed inside IC card 10. In this embodiment, IC card 10 is a contact type IC card. Currently, FeliCa, Type A, and Type B types are commonly known as contactless communication methods, and the contactless IC card of the present application can appropriately adopt the communication method of each of the three types described above.

[0133] The IC card 10 has a laminated structure 10A including an IC module 20. The IC card 10 including such a laminated structure 10A includes an antenna-containing layer 12 that contains an antenna 25 connected to the IC module 20, a pair of core layers 13a and 13b provided on both sides of the antenna-containing layer 12, and a pair of over-sheet layers 34a and 34b provided on both sides of each of the core layers 13a and 13b.

[0134] Of these, the antenna-built-in layer 12 includes an antenna mounting layer 12b on which an antenna 25 is mounted, and an antenna cover layer 12a that covers the antenna 25 on the antenna mounting layer 12b.

[0135] Further, of the pair of over-sheet layers 34a, 34b, a concealing layer 15 is provided on the surface side over-sheet layer 34a, a picture print layer 16 located on the concealing layer 15 and including a picture print 16A, and a peel-off layer 17 made of a transparent body located on the picture print layer 16.

[0136] Further, the over-sheet layer 34a on the front side and the over-sheet layer 34b on the back side are provided with a magnetic recording section 19, and the magnetic recording section 19 on the front side is covered with a concealing layer 15 so that it cannot be seen from the outside.

[0137] As shown in FIG. 9, an opening 31 is formed in the antenna mounting layer 12b and the antenna cover layer 12a that constitute the built-in antenna layer 12, and the IC module 20 is mounted in this opening 31.

[0138] The IC module 20 mounted in the opening 31 is connected to the antenna 25 sandwiched between the antenna mounting layer 12b and the antenna cover layer 12a of the built-in-antenna layer 12. An intermediate layer 52a is interposed between the antenna cover layer 12a and the core layer 13a. An intermediate layer 52b is interposed between the antenna mounting layer 12b and the core layer 13b.

[0139] Next, the over-sheet layers 34a, 34a will be described. Since the over-sheet layers 14a, 14b have substantially the same structure, only the over-sheet layer 34a on the surface side will be described here.

[0140] As shown in FIG. 7, the over-sheet layer 34a has an intermediate layer 4A and a pair of first antibacterial layers 5, 6 provided on both sides of the intermediate layer and having an antibacterial agent kneaded therein.

[0141] Of these, the middle layer 4A contains transparent polycarbonate (PC). The pair of first antibacterial layers 5 and 6 each contain transparent polyethylene terephthalate (PETG). By forming the pair of first antibacterial layers 5 and 6 from PETG in this way, each of the first antibacterial layers 5 and 6 can be more effectively adhered to the middle layer 4A.

[0142] The over-sheet layer 34a, which includes the middle layer 4A and the pair of first antibacterial layers 5 and 6, is produced by co-extrusion of three layers of two kinds of materials, and has an overall thickness of 50 μm. The thickness ratio of the first antibacterial layer 5, the middle layer 4A, and the first antibacterial layer 6 is 1:2:1, i.e., 12.5 μm:25 μm:12.5 μm.

[0143] The middle layer 4A of the over-sheet layer 34a and the first antibacterial layers 5 and 6 may all be made of polycarbonate (PC).

[0144] In this way, the over-sheet layer 14a, which includes the middle layer 4A and the pair of first antibacterial layers 5, 6, is configured to be thin as a whole at 50 μm, and the antibacterial agent is kneaded only into the pair of antibacterial layers 5, 6. This allows the pair of first antibacterial layers 5, 6 to be made thinner, which makes the antibacterial agent kneaded into the first antibacterial layers 5, 6 more likely to appear on the outer surface than if it were kneaded into an antibacterial layer configured to be thick, thereby further enhancing the antibacterial function of the pair of first antibacterial layers 5, 6.

[0145] The middle layer 4A contains polycarbonate as described above, and also contains a laser light coloring accelerator that changes color and turns black when irradiated with laser light, thereby displaying the desired characters. Therefore, the middle layer 4A is a laser light coloring layer that changes color when irradiated with laser light.

[0146] In Figure 9, when a laser beam is irradiated onto the front side of IC card 10, the laser beam irradiated onto IC card 10 passes through transparent peeling layer 17, heating and melting peeling layer 17, picture printed layer 16, and concealing layer 15, causing them to scatter (see Figure 6B). The laser beam then passes through antibacterial layer 6 of over-sheet layer 34a and reaches middle layer 4A. When middle layer 4A is irradiated with the laser beam, the laser beam color-developing accelerator in middle layer 4A acquires thermal energy. In this case, the carbon contained in the polycarbonate in contact with the laser beam color-developing accelerator burns and turns black, allowing characters to be displayed. [Example]

[0147] Next, an example of this embodiment will be described.

[0148] The IC card 10 according to this embodiment was subjected to an antibacterial test in accordance with JIS Z 2801 using Escherichia coli.

[0149] A release layer 17 that serves as a second antibacterial layer is formed on the front side of the IC card 10, and a first antibacterial layer 5 of the over-sheet layer 34b is formed on the back side.

[0150] As a result of the antibacterial test, the antibacterial activity value on the front side was 6.5, and on the back side was 3.1. Both the front and back sides of the IC card 10 exceeded the standard value of 2.0 for antibacterial effectiveness.

[0151] As described above, according to this embodiment, the release layer 17, which serves as the second antibacterial layer, is formed on the surface side of the IC card 10. Because the release layer 17 is a sufficiently thin layer (0.1 to 2.0 μm), the antibacterial agent in the release layer 17 easily appears on the outer surface, thereby enabling the antibacterial agent to exhibit a high antibacterial function.

[0152] On the back side of the IC card 10, the over-sheet layer 34b includes a middle layer 4A and a pair of first antibacterial layers 5, 6, of which the first antibacterial layers 5, 6 are thin (12.5 μm). Therefore, the antibacterial agent in the first antibacterial layer 5 located on the back side of the IC card 10 can easily appear on the outer surface, thereby achieving high antibacterial function.

[0153] Moreover, since the over-sheet layers 34a, 34b have a middle layer 4A made of polycarbonate and a pair of antibacterial layers 5, 6 made of polyethylene terephthalate, the polycarbonate middle layer 4A can provide the over-sheet layers 34a, 34b with an appropriate strength.

[0154] In addition, the over-sheet layers 34a, 34b are structured so that the middle layer 4A is sandwiched between a pair of antibacterial layers 5, 6, allowing for a symmetrical layer structure centered on the middle layer 4A, and no warping occurs in the over-sheet layers 34a, 34b.

[0155] Because the over-sheet layers 34a, 34b have a symmetrical layer structure with the middle layer 4A at the center, when the over-sheet layers 34a, 34b are used to fabricate the IC card 10, accuracy in the front and back is not required, and the IC card 10 can be easily fabricated. Note that the over-sheet layers 34a, 34b are not limited to having a symmetrical layer structure with the middle layer 4A at the center, and may be composed of the middle layer 4A and, for example, a first antibacterial layer 5 provided on one side of the middle layer 4A. Furthermore, of the over-sheet layers 34a, 34b, the over-sheet layer 34a does not necessarily have to be provided, and only the over-sheet layer 34b may be provided.

[0156] <Fifth embodiment> The fifth embodiment will be described below with reference to the drawings.

[0157] FIG. 10 is a diagram illustrating a fifth embodiment of the present disclosure.

[0158] The fifth embodiment shown in Fig. 10 differs in the configuration of the picture print layer and the protective layer, but other configurations are substantially the same as those of the third embodiment shown in Fig. 8. In the fifth embodiment shown in Fig. 10, the same parts as those of the third embodiment shown in Fig. 8 are given the same reference numerals and detailed description thereof will be omitted.

[0159] 10, IC card 10 has an IC module 20 built in, and this IC module 20 is disposed inside IC card 10. In this embodiment, IC card 10 is a contactless IC card. Currently, FeliCa, Type A, and Type B types are commonly known as contactless communication methods, and the contactless IC card of the present application can appropriately adopt the communication method of each of the three types described above.

[0160] The IC card 10 has a laminated structure 10A including an IC module 20. The IC card 10 including such a laminated structure 10A includes an antenna-built-in layer 12 that incorporates an antenna 25 connected to the IC module 20, and a pair of core layers 13a and 13b provided on both sides of the antenna-built-in layer 12.

[0161] Of these, the antenna-built-in layer 12 includes an antenna mounting layer 12b on which an antenna 25 is mounted, and an antenna cover layer 12a that covers the antenna 25 on the antenna mounting layer 12b.

[0162] As shown in FIG. 10, an opening 31 is formed in the antenna mounting layer 12b and the antenna cover layer 12a that constitute the built-in antenna layer 12, and the IC module 20 is mounted in this opening 31.

[0163] The IC module 20 mounted in the opening 31 is connected to the antenna 25 sandwiched between the antenna mounting layer 12b and the antenna cover layer 12a of the built-in-antenna layer 12. An intermediate layer 52a is interposed between the antenna cover layer 12a and the core layer 13a. An intermediate layer 52b is interposed between the antenna mounting layer 12b and the core layer 13b.

[0164] Of the core layers 13a and 13b, a picture-printed layer 40a is provided on the core layer 13a on the surface side, and a protective layer 41a is provided on the picture-printed layer 40a.

[0165] The core layer 13b on the back side is provided with a picture printed layer 40b and a protective layer 41b located on the picture printed layer 40b.

[0166] As described above, the picture-printed layer 40a and the protective layer 41a are provided in this order from the inside to the outside on the front-side core layer 13a, and the picture-printed layer 40b and the protective layer 41b are provided in this order on the back-side core layer 13b.

[0167] The picture-printed layers 40a and 40b are obtained by applying ink to form a picture print, and the protective layers 41a and 41b are formed by applying ink onto the picture-printed layers 40a and 40b.

[0168] In this embodiment, the protective layers 41a and 41b contain the ink with the antibacterial agent kneaded in. Among these, inks for forming the protective layers 41a and 41b may have the following configurations.

[0169] Cyclohexanone, content 30.0-35.0%, coal tar naphtha, content 25.0-30.0%, acrylic resin, content 25.0-30.0%, cellulose resin, content 3.0-5.0%, vinyl chloride / vinyl acetate resin, content 3.0-5.0%, trimethylbenzene, content 3.0% or less, toluene (227), content 2.0% or less, antioxidant, content 2.0% or less, wax, content 1.0% or less, polyester resin, content 1.0% or less, ultraviolet absorber, content 0.5% or less.

[0170] The antibacterial agent in the protective layers 41a and 41b can be silver oxide-zinc calcium phosphate. In addition to the antibacterial agent, the protective layers 41a and 41b can also be made of ink containing an antiviral agent. The inclusion of the antiviral agent helps prevent viruses from adhering to the front and back surfaces of the card.

[0171] In this embodiment, the protective layers 41a and 41b are located on the outermost surface of the front side and the outermost surface of the back side.

[0172] In this embodiment, the protective layers 41a and 41b located on the outermost surfaces of the front and back sides are called third antibacterial layers.

[0173] As described above, according to this embodiment, protective layers 41a and 41b, which serve as the third antibacterial layer, are formed on the front and back sides of IC card 10. Protective layers 41a and 41b are sufficiently thin (0.1 to 2.0 μm), so that the antibacterial agent in protective layers 41a and 41b can easily appear on the outer surface, thereby achieving a high antibacterial function.

[0174] Of the picture-printed layers 40a, 40b and the protective layers 41a, 41b, only the picture-printed layer 40a and the protective layer 41a may be provided.

[0175] Sixth Embodiment In the first to fifth embodiments, an antibacterial agent is kneaded into the first antibacterial layers 5 and 6 of the over-sheet layers 14a, 14b, 34a, and 34b, and into the peel-off layer 17 and protective layers 41a and 41b. However, the present invention is not limited to this. An antiviral agent or an antibacterial / antiviral agent may be kneaded into the first antibacterial layers 5 and 6, the peel-off layer 17, and the protective layers 41a and 41b together with or instead of the antibacterial agent. This makes it possible to provide a card with high antiviral functionality.

[0176] In this case, the first antibacterial layers 5 and 6, the release layer 17, and the protective layers 41a and 41b of the over-sheet layers 14a, 14b, 34a, and 34b serve as antibacterial or antiviral layers.

[0177] Here, the antibacterial agent and the antiviral agent used together with or in place of the antibacterial agent will be described below.

[0178] (1) Antibacterial, antiviral, and antibacterial / antiviral agents In the present disclosure, the first antibacterial layers 5 and 6 of the over-sheet layers 14a, 14b, 34a, and 34b, the release layer 17, or the resin layer consisting of the protective layers 41a and 41b (hereinafter the same) contain at least one of an antibacterial agent and an antiviral agent, as described above. Note that "at least one of an antibacterial agent and an antiviral agent" includes antibacterial agents, pure antiviral agents with antiviral activity, and antibacterial and antiviral agents. An "antibacterial and antiviral agent" is a substance that has both antibacterial and antiviral activity. Note that the antibacterial agents described above can be used.

[0179] (2) Antiviral drugs The antiviral agent used in the present disclosure is not particularly limited as long as it is a pure antiviral agent with antiviral activity and is a substance that can reduce the number of viruses, and general antiviral agents can be used. Examples include organic antiviral agents, inorganic antiviral agents, and photocatalytic antiviral agents. These antiviral agents may also be used in combination.

[0180] (3) Antibacterial and antiviral agents The antibacterial and antiviral agent used in the present disclosure is not particularly limited as long as it has both antibacterial and antiviral activity and is a substance that can inhibit bacterial growth and reduce the number of viruses, and general antibacterial and antiviral agents can be used. Examples include organic antibacterial and antiviral agents, inorganic antibacterial and antiviral agents, and photocatalytic antibacterial and antiviral agents. These antibacterial and antiviral agents may also be used in combination.

[0181] (4) Materials and shapes of various antibacterial and antiviral agents Organic antibacterial agents, organic antiviral agents, and organic antibacterial and antiviral agents include, for example, organic synthetic agents and organic natural agents. Examples of organic synthetic agents include alcohols, phenols, aldehydes, carboxylic acids, esters, ethers, nitriles, peroxides, halogens, pyridine-quinolines, triazines, isothiazolones, imidazole-thiazoles, anilides, biguanides, disulfides, thiocarbamates, guanidines, hydrogen peroxide solutions, surfactants, and organometallic agents. Examples of organic natural agents include terpenes, carbohydrates, tropolones, esters, chitosan, propolis, polylysine, tea catechins, and mustard and wasabi extracts (allyl isothiocyanate).

[0182] Examples of inorganic antibacterial agents, inorganic antiviral agents, and inorganic antibacterial and antiviral agents include silver-based, zinc-based, and copper-based agents.

[0183] Examples of the photocatalytic antibacterial agent, photocatalytic antiviral agent, and photocatalytic antibacterial and antiviral agent include titanium oxide and zinc oxide.

[0184] The antibacterial agent, antiviral agent, and antibacterial and antiviral agent may be used alone or in combination of two or more.

[0185] When the antibacterial agent, antiviral agent, and antibacterial and antiviral agent are inorganic, such as silver-based, zinc-based, or copper-based, for example, an antibacterial agent, antiviral agent, or antibacterial and antiviral agent in which a carrier carries or contains a metal ion such as a silver ion, zinc ion, or copper ion can be used.

[0186] The phrase "containing metal ions in a carrier" means that metal ions or a substance capable of generating metal ions are held in a carrier in some form. The phrase "substance capable of generating metal ions" refers to a substance that generates metal ions due to external factors or factors over time, such as a substance that generates metal ions by dissolving in water or the like.

[0187] As the carrier, for example, inorganic compounds such as zeolite, silica gel, apatite, glass, zirconium phosphate, and titanium phosphate are preferred, and among these, porous inorganic compounds are more preferred.

[0188] The antibacterial agent, antiviral agent, and antibacterial / antiviral agent preferably have a particulate form.

[0189] Among the above, examples of antibacterial agents, antiviral agents, and antibacterial and antiviral agents having a particulate form include inorganic and photocatalytic agents, and organic particle-based agents having a particulate form among the above organic agents.

[0190] The shape of the antibacterial agent, antiviral agent, and particles of the antibacterial and antiviral agent is not particularly limited, and can be any shape, such as a sphere, an ellipsoid, a polyhedron, or a scale.

[0191] The average particle diameter of the antibacterial, antiviral, and antibacterial / antiviral agent particles is, for example, 3 μm or more, 5 μm or more, or even 7 μm or more. When the average particle diameter is within the above range, the resin composition containing the ink and at least one of the antibacterial, antiviral, and antibacterial / antiviral agent is applied to form, for example, the first antibacterial layer 5, 6 of the over-sheet layer 14a, 14b, 34a, 34b, the release layer 17, or the protective layer 41a, 41b, and the resin composition is more stable. On the other hand, the average particle diameter of the particles is, for example, 15 μm or less, or may be 12 μm or less, or 10 μm or less. If the average particle diameter is too large, the antibacterial or antiviral agent protrudes more from the surface of the resin layer opposite the substrate, reducing its resistance to abrasion and making the antibacterial or antiviral agent more likely to fall off the resin layer, potentially reducing its antibacterial or antiviral properties. Furthermore, depending on the application of the laminate, a long laminate may be wound into a roll, or multiple sheet-like laminates may be stacked. In such cases, if the average particle diameter is too large, the surface of the laminate facing the substrate may be damaged by contact with the surface of the laminate facing the resin layer.

[0192] Furthermore, the average particle size of the antibacterial agent, antiviral agent, and particles of the antibacterial and antiviral agent is preferably larger than the thickness of the resin layer.

[0193] Specifically, the ratio (D / T) of the average particle diameter D of the antibacterial agent, antiviral agent, and antibacterial / antiviral agent particles to the thickness T of the resin layer is preferably greater than 1.0, more preferably 1.5 or greater, and may be 3.5 or greater, or even 5.0 or greater. Meanwhile, the ratio (D / T) of the average particle diameter D of the antibacterial agent, antiviral agent, and antibacterial / antiviral agent particles to the thickness T of the resin layer is, for example, 12.0 or less, and may be 6.0 or less. If the ratio is too large, the antibacterial agent and antiviral agent will protrude more from the surface of the resin layer opposite the substrate, reducing resistance to abrasion and making the antibacterial agent and antiviral agent more likely to fall off from the resin layer, potentially reducing the antibacterial and antiviral properties.

[0194] Here, the average particle size of the antibacterial agent, antiviral agent, and antibacterial / antiviral agent particles can be the average value of the particle sizes of any 10 particles obtained by measuring a cross section of the laminate in the thickness direction observed with a scanning electron microscope (SEM). When the particle shape is not spherical, the particle size is the long axis of the particle.

[0195] The thickness of the resin layer can be the average value of thicknesses measured at any 10 locations on a cross section of the laminate in the thickness direction observed with a transmission electron microscope (TEM), a scanning electron microscope (SEM), or a scanning transmission electron microscope (STEM).

[0196] The content of the antibacterial agent, antiviral agent, and antibacterial / antiviral agent in the resin layer is not particularly limited as long as the desired antibacterial and antiviral properties can be obtained, and can be appropriately set depending on the type of antibacterial agent, antiviral agent, and antibacterial / antiviral agent, the configuration and application of the laminate, etc. Specifically, the total content of the antibacterial agent, antiviral agent, and antibacterial / antiviral agent in the resin layer is 0.5% by mass or more, or may be 1.0% by mass or more, or may be 2.0% by mass or more. If the content of the antibacterial agent, antiviral agent, and antibacterial / antiviral agent is too low, the desired antibacterial and antiviral properties may not be obtained. On the other hand, the total content of the antibacterial agent, antiviral agent, and antibacterial / antiviral agent in the resin layer is, for example, 10.0% by mass or less, or may be 8.0% by mass or less, or may be 6.0% by mass or less. If the content of the antibacterial agent, antiviral agent, and antibacterial / antiviral agent is too high, although sufficient antibacterial and antiviral properties may be obtained, the strength and scratch resistance of the resin layer may be reduced. Furthermore, if the content of the antibacterial agent, antiviral agent, and antibacterial / antiviral agent is too high, the transparency may decrease, and depending on the type of the antibacterial agent, antiviral agent, and antibacterial / antiviral agent, the resin layer may become cloudy. If the transparency of the resin layer decreases, it may become difficult to see the underlying layer of the resin layer, such as the substrate or the decorative layer described below. Furthermore, if the content of the antibacterial agent, antiviral agent, and antibacterial / antiviral agent is too high, the cost may increase.

[0197] Seventh Embodiment The first embodiment will be described below with reference to the drawings.

[0198] 11 and 12 are diagrams showing a seventh embodiment of the present disclosure. As an example of a laminate with an IC module built in, an IC card 10 incorporating a laminate with an IC module built in will be described with reference to Fig. 11. Note that the laminate with an IC module built in is not limited to the IC card 10, and may be incorporated in a passport (booklet).

[0199] 11, IC card 10 has an IC module 20 built in, and this IC module 20 is exposed to the outside on the surface of IC card 10. In this embodiment, IC card 10 is a dual-interface IC card that is both contact and contactless.

[0200] As will be described later, the IC card 10 includes a magnetic recording section (also called a magnetic recording tape) 19, and a picture print 16A appears on the surface of the IC card 10 (see FIG. 5).

[0201] Next, an IC card 10 constituting a laminated body with a built-in IC module will be described with reference to FIGS.

[0202] The IC card 10 has a laminated structure 10A including an IC module 20. The IC card 10 including such a laminated structure 10A includes an antenna-built-in layer 12 that incorporates an antenna 25 connected to the IC module 20, a pair of core layers 13a and 13b provided on both sides of the antenna-built-in layer 12, and a pair of over-sheet layers 60 and 61 provided on both sides of each of the core layers 13a and 13b.

[0203] Of these, the antenna-built-in layer 12 includes an antenna mounting layer 12b on which an antenna 25 is mounted, and an antenna cover layer 12a that covers the antenna 25 on the antenna mounting layer 12b.

[0204] Furthermore, of the pair of over-sheet layers 60, 61, a concealing layer 15 is provided on the surface side of the over-sheet layer 60, a picture print layer 16 (see Figure 5) located on the concealing layer 15 and including a picture print 16A, and a peel-off layer 67 made of a transparent body located on the picture print layer 16.

[0205] Further, the over-sheet layer 60 on the front side and the over-sheet layer 61 on the back side are provided with a magnetic recording section 19, and the magnetic recording section 19 on the front side is covered with a concealing layer 15 so that it cannot be seen from the outside.

[0206] A recess 30 is formed on the surface side of the laminated structure 10A having such a configuration, and the above-mentioned IC module 20 is mounted in this recess 30 to obtain the IC card 10. Note that although the recess 30 in Figure 11 is illustrated as having a wide space (gap) between the IC module 20 and each layer, in reality there is almost no gap.

[0207] Next, the IC module 20 mounted in the recess 30 of the laminated structure 10A will be described.

[0208] The IC module 20 has a substrate 21 and an IC chip 22a provided on the substrate 21. The IC chip 22a is covered with a sealing resin 22b. The IC chip 22a and the sealing resin 22b constitute an IC chip body 22 (see FIG. 2).

[0209] The IC module 20 having such a structure is mounted in the recess 30, and is connected to an antenna 25 built into the antenna-built-in layer 12. In this case, a conductive plate 28 is provided on the antenna mounting layer 12b, and the IC module 20 is connected to the antenna 25 via conductive paste 27 and the conductive plate 28. In this case, a conductive film may be used instead of the conductive paste 27. Figure 3 shows the connection relationship between the IC module 20 and the IC module 20. Here, the antenna 25 is sandwiched between the antenna mounting layer 12b and the antenna cover layer 12a as described above, and is made of copper.

[0210] Next, a description will be given of the over-sheet layers 60 and 61. The over-sheet layers 60 and 61 are both made of transparent polycarbonate (PC) or polyvinyl chloride (PVC).

[0211] A coating layer 61a containing an antiviral agent is provided on the lower surface (outer surface) of the back-side over-sheet layer 61. The back-side over-sheet layer 61 and the coating layer 61a form an over-sheet body 61A having antiviral properties (see FIG. 12).

[0212] In this embodiment, a coating layer 61a is provided on the over-sheet layer 61 on the back side, and the magnetic recording section 19 is actually provided on this coating layer 61a.

[0213] The coating layer 61a provided on the over-sheet layer 61 on the back side serves as a first antiviral layer containing an antiviral agent.

[0214] The laminated structure 10A is composed of the antenna-built-in layer 12, the pair of core layers 13a and 13b provided on both sides of the antenna-built-in layer 12, the pair of over-sheet layers 60 and 61 provided on both sides of the pair of core layers 13a and 13b, and the coating layer 61a. An IC module 20 is embedded in the laminated structure 10A to obtain an IC card 10 constituting a laminate according to the present disclosure.

[0215] The laminate according to the present disclosure does not necessarily include the built-in antenna layer 12 or the IC module 20, but may include at least a pair of core layers 13a, 13b and a pair of over-sheet layers 60, 61, with a coating layer 61a containing an antiviral agent provided on the back-side over-sheet layer 61. Such an embodiment will be described later as the tenth embodiment.

[0216] In this embodiment, the core body 13 is formed by a pair of core layers 13a and 13b.

[0217] Next, a method for manufacturing the coating layer 61a containing the antiviral agent provided on the back surface side over-sheet layer 61 will be described.

[0218] The coating layer 61a is obtained by running the over-sheet layer 61 on the back side and applying ink for the coating layer onto the running over-sheet layer 61.

[0219] In this case, the over-sheet layer 61 is run by a roll-to-roll method, and the coating layer ink is applied by a gravure printing method onto the running over-sheet layer 61, thereby obtaining the coating layer 61a. The coating layer ink contains at least one of a pure antiviral agent having antiviral activity and an antibacterial and antiviral agent having both antibacterial and antiviral activities.

[0220] In this embodiment, at least one of a pure antiviral agent having antiviral activity and an antibacterial and antiviral agent having both antibacterial and antiviral activities is collectively referred to as an “antiviral agent.” As such pure antiviral agents and antibacterial and antiviral agents, the antiviral agents and antibacterial and antiviral agents described in sections (1) to (4) of the sixth embodiment above can be used.

[0221] Furthermore, when ink for the coating layer is applied onto the over-sheet layer 61, the solvent in the ink evaporates while the ink dries, and a coating layer 61a is formed on the over-sheet layer 61. In this embodiment, the thickness of the coating layer 61a is 0.1 μm to 1000 μm (microns), and more preferably 0.1 μm to 10 μm.

[0222] As will be described later, the coating layer 61a formed on the over-sheet layer 61 contains an antiviral agent and has a high level of antiviral function. Furthermore, such coating layer 61a not only has the antiviral function due to the antiviral agent, but also has some degree of antibacterial function.

[0223] Solvents used in this embodiment include, for example, tetrahydrofuran, ethyl acetate, acetone, toluene, methyl ethyl ketone, synthetic resin, isobutyl alcohol, isopropyl alcohol, ethyl ether, ethylene glycol, acetic acid, isopropyl acetate, butanol, THF primer (a mixture of ethyl acetate, acetone, toluene, methyl ethyl ketone, and synthetic resin), those mainly composed of polyol components, those mainly composed of isocyanate components, fatty acid esters, etc., and one of these may be selected or a mixture may be used. Other commonly known solvents may also be used. For example, a modified type of THF primer exists. Synthetic resins include, for example, polyurethane for adhesives.

[0224] Incidentally, among the IC card 10 constituting the laminate, the resins that are the material for the antenna-embedded layer 12 consisting of the antenna mounting layer 12b and the antenna cover layer 12a, and the pair of core layers 13a, 13b are not particularly limited, but specific examples include synthetic resins such as polyvinyl chloride resin, vinyl acetate resin, vinyl chloride-vinyl acetate copolymer resin, butadiene resin, acrylonitrile-butadiene-styrene copolymer resin, polycarbonate resin, polyamide resin, cellulose resin, polyester, polyolefins such as polyethylene and polypropylene, polyvinyl alcohol, acrylic resin, polymethyl methacrylate resin, styrene resin, urethane resin, fluororesin, and mixtures thereof.

[0225] On the over-sheet layer 60 on the surface side, a concealing layer 15, a picture printed layer 16, and a release layer 67 are provided in this order from the inside to the outside.

[0226] In this embodiment, the concealing layer 15 includes, for example, silver, black, gold, or red, and the silver concealing layer is made of aluminum.

[0227] The picture print layer 16 is obtained by applying ink to form the picture print 16 A. Although the picture print layer 16 in Fig. 11 is a solid print on the entire surface of the layer, the picture print layer 16 may also be a partial print like the picture print 16 A in Fig. 5.

[0228] The above-mentioned concealing layer 15 and picture printing layer 16 are provided in advance on a transfer sheet substrate (not shown) via a peeling layer 67, and the concealing layer 15 and picture printing layer 16 are formed on the over-sheet layer 60 by transferring the concealing layer 15 and picture printing layer 16 on the transfer sheet substrate together with the peeling layer 67 onto the over-sheet layer 60 on the surface side.

[0229] In the present embodiment, release layer 67 is made of a transparent material and is obtained from ink kneaded with an antiviral agent similar to the antiviral agent contained in coating layer 61 a. Among these, inks that form the release layer may have the following configurations:

[0230] Resin 1 (acrylic resin) content: 20-30%, Resin 2 (vinyl chloride-vinyl acetate resin) content: 5% or less, Resin 3 (polyester resin) content: 1% or less, UV absorber content: 2% or less, Methyl ethyl ketone content: 30-40%, Toluene (300) content: 34.0-36.0%, Polyethylene wax content: 1% or less.

[0231] As the antiviral agent in release layer 67, the above-mentioned antiviral agent can be used, similar to the antiviral agent contained in coating layer 61a as described above, and the weight ratio of the antiviral agent in release layer 67 is 2 to 4%.

[0232] In this embodiment, the release layer 67 is located on the outermost surface of the front side, and the coating layer 61a provided on the over-sheet layer 61 on the back side is located on the outermost surface of the back side.

[0233] Therefore, the release layer 67 located on the outermost surface of the front side can also be called a second antiviral layer, in comparison with the coating layer (first antiviral layer) located on the outermost surface of the back side.

[0234] For example, a coating layer containing an antiviral agent can be made by mixing THF primer (modified A), polyurethane adhesive, isopropyl acetate, and the antiviral agent. Specifically, approximately 2 parts by mass of the antiviral agent is added to 100 parts by mass of THF primer (modified A), 5 parts by mass of polyurethane adhesive, and 100 parts by mass of isopropyl acetate, so that the content of the antiviral agent is 2% of the total mass. The coating amount of the coating layer is 0.5 to 5.0 g / m. 2 More preferably, it is 1.0 to 1.2 g / m 2 is.

[0235] The over-sheet layer 61 forming the coating layer 61a can be pretreated, and pretreatment is the aging of the over-sheet layer 61. In this disclosure, aging refers to heat treatment or leaving the layer at a certain temperature and humidity for a certain period of time. Aging may also be a treatment involving exposure to a certain amount of light.

[0236] As described above, according to the present embodiment, by providing coating layer 61a containing an antiviral agent on over-sheet layer 61 on the back side of IC card 10, it is possible to impart a high antiviral function to the back side of IC card 10. Furthermore, coating layer 61a can be obtained simply by preparing ink for the coating layer containing an antiviral agent and applying this coating layer ink onto over-sheet layer 61, so that coating layer 61a containing an antiviral agent can be formed on over-sheet layer 61 easily and simply.

[0237] Furthermore, when the concealing layer 15 and the picture printed layer 16 are transferred onto the oversheet layer 60 on the front side of the IC card 10, an antiviral agent is kneaded into the peeling layer 67 that remains on the picture printed layer 16 side, thereby imparting a high level of antiviral function to the front side of the IC card 10. In this case, because the antiviral agent is kneaded into the peeling layer 67 in advance, there is no need to separately provide a special antiviral functional layer to impart antiviral function to the front side of the IC card 10, which allows for a shortening of the manufacturing process.

[0238] Furthermore, both the coating layer 61a, which will become the first antiviral layer, and the release layer 67, which will become the second antiviral layer, are formed by preparing ink containing an antiviral agent and applying this ink. In this case, there is no need to excessively heat the ink for the coating layer 61a and the release layer 67 in order to form the coating layer 61a and the release layer 67. This prevents the antiviral agent in the ink from deteriorating.

[0239] Of the over-sheet layers 60 and 61, the over-sheet layer 60 does not necessarily have to be provided, and only the over-sheet layer 61 may be provided.

[0240] <Eighth embodiment> The eighth embodiment will be described below with reference to the drawings.

[0241] FIG. 13 is a diagram illustrating an eighth embodiment of the present disclosure.

[0242] In the eighth embodiment shown in FIG. 13, the same parts as those in the seventh embodiment shown in FIGS. 11 and 12 are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0243] 13, IC card 10 has an IC module 20 built in, and this IC module 20 is disposed inside IC card 10. In this embodiment, IC card 10 is a contactless IC card. Currently, FeliCa, Type A, and Type B types are commonly known as contactless communication methods, and the contactless IC card of the present application can appropriately adopt the communication method of each of the three types described above.

[0244] The IC card 10 has a laminated structure 10A including an IC module 20. The IC card 10 including such a laminated structure 10A includes an antenna-built-in layer 12 that incorporates an antenna 25 connected to the IC module 20, a pair of core layers 13a and 13b provided on both sides of the antenna-built-in layer 12, and a pair of over-sheet layers 60 and 61 provided on both sides of each of the core layers 13a and 13b.

[0245] The built-in antenna layer 12 includes an antenna mounting layer 12b on which an antenna 25 is mounted, and an antenna cover layer 12a that covers the antenna 25 on the antenna mounting layer 12b. A core body 13 is formed by a pair of core layers 13a and 13b.

[0246] Furthermore, of the pair of over-sheet layers 60, 61, a concealing layer 15 is provided on the surface side of the over-sheet layer 60, a picture print layer 16 (see Figure 5) located on the concealing layer 15 and including a picture print 16A, and a peel-off layer 67 made of a transparent body located on the picture print layer 16.

[0247] In addition, a magnetic recording section (also called magnetic recording tape) 19 is provided on the over-sheet layer 60 on the front side and the over-sheet layer 61 on the back side, and the magnetic recording section 19 on the front side is covered with a concealing layer 15 so that it cannot be seen from the outside.

[0248] 13, an opening 31 is formed in the antenna mounting layer 12b and the antenna cover layer 12a that constitute the built-in-antenna layer 12, and the IC module 20 is mounted in this opening 31. Although a wide space (gap) is shown in the drawing where the opening 31 is located, in reality there is almost no space. The same is true for the opening 31 in FIG. 14, which will be described later.

[0249] The IC module 20 mounted in the opening 31 is connected to the antenna 25 sandwiched between the antenna mounting layer 12b and the antenna cover layer 12a of the built-in-antenna layer 12. An intermediate layer 52a is interposed between the antenna cover layer 12a and the core layer 13a. An intermediate layer 52b is interposed between the antenna mounting layer 12b and the core layer 13b.

[0250] Next, a description will be given of the over-sheet layers 60 and 61. The over-sheet layers 60 and 61 are both made of transparent polycarbonate (PC) or polyvinyl chloride (PVC).

[0251] A coating layer 61a containing an antiviral agent is provided on the lower surface (outer surface) of the back-side over-sheet layer 61. The back-side over-sheet layer 61 and the coating layer 61a form an over-sheet body 61A having antiviral properties.

[0252] In this embodiment, a coating layer 61a is provided on the over-sheet layer 61 on the back side, and the magnetic recording section 19 is actually provided on this coating layer 61a.

[0253] The coating layer 61a provided on the over-sheet layer 61 on the back side serves as a first antiviral layer containing an antiviral agent.

[0254] As described above, the concealing layer 15, the picture printed layer 16, and the release layer 67 are provided on the over-sheet layer 60 on the surface side in this order from the inside to the outside.

[0255] In this embodiment, the concealing layer 15 includes, for example, silver, black, gold, or red, and the silver concealing layer is made of aluminum.

[0256] The picture print layer 16 is obtained by applying ink to form a picture print 16A.

[0257] The above-mentioned concealing layer 15 and picture printing layer 16 are provided in advance on a transfer sheet substrate (not shown) via a peeling layer 67, and the concealing layer 15 and picture printing layer 16 are formed on the over-sheet layer 60 by transferring the concealing layer 15 and picture printing layer 16 on the transfer sheet substrate together with the peeling layer 67 onto the over-sheet layer 60 on the surface side.

[0258] In this embodiment, release layer 67 is made of a transparent material and is obtained from ink kneaded with an antiviral agent similar to the antiviral agent contained in coating layer 61a. Among these, the ink for forming the release layer may have the following composition: Resin 1 (acrylic resin) content of 20 to 30%, Resin 2 (vinyl chloride-vinyl acetate resin) content of 5% or less, Resin 3 (polyester resin) content of 1% or less, UV absorber content of 2% or less, methyl ethyl ketone content of 30 to 40%, toluene (300) content of 34.0 to 36.0%, and polyethylene wax content of 1% or less.

[0259] The antiviral agent in release layer 67 can be the same as the antiviral agent contained in coating layer 61a as described above, and the weight ratio of the antiviral agent in release layer 67 is 2 to 4%.

[0260] In this embodiment, the release layer 67 is located on the outermost surface of the front side, and the coating layer 61a provided on the over-sheet layer 61 on the back side is located on the outermost surface of the back side.

[0261] Therefore, the release layer 67 located on the outermost surface of the front side can also be called a second antiviral layer, in comparison with the coating layer (first antiviral layer) located on the outermost surface of the back side.

[0262] Of the over-sheet layers 60 and 61, the over-sheet layer 60 does not necessarily have to be provided, and only the over-sheet layer 61 may be provided.

[0263] <Ninth embodiment> The ninth embodiment will be described below with reference to the drawings.

[0264] FIG. 14 is a diagram illustrating a ninth embodiment of the present disclosure.

[0265] The ninth embodiment shown in Fig. 14 differs in the configuration of the picture print layer and the protective layer, but other configurations are substantially the same as those of the eighth embodiment shown in Fig. 13. In the ninth embodiment shown in Fig. 14, the same parts as those in the eighth embodiment shown in Fig. 13 are given the same reference numerals and detailed description thereof will be omitted.

[0266] 14, IC card 10 has built-in IC module 20, and this IC module 20 is disposed inside IC card 10. In this embodiment, IC card 10 is a contactless IC card. Currently, FeliCa, Type A, and Type B types are commonly known as contactless communication methods, and the contactless IC card of the present application can appropriately adopt the communication method of each of the three types described above.

[0267] The IC card 10 has a laminated structure 10A including an IC module 20. The IC card 10 including such a laminated structure 10A includes an antenna-built-in layer 12 that incorporates an antenna 25 connected to the IC module 20, and a pair of core layers 13a and 13b provided on both sides of the antenna-built-in layer 12.

[0268] The built-in antenna layer 12 includes an antenna mounting layer 12b on which an antenna 25 is mounted, and an antenna cover layer 12a that covers the antenna 25 on the antenna mounting layer 12b. A core body 13 is formed by a pair of core layers 13a and 13b.

[0269] As shown in FIG. 14, an opening 31 is formed in the antenna mounting layer 12b and the antenna cover layer 12a that constitute the built-in antenna layer 12, and the IC module 20 is mounted in this opening 31.

[0270] The IC module 20 mounted in the opening 31 is connected to the antenna 25 sandwiched between the antenna mounting layer 12b and the antenna cover layer 12a of the built-in-antenna layer 12. An intermediate layer 52a is interposed between the antenna cover layer 12a and the core layer 13a. An intermediate layer 52b is interposed between the antenna mounting layer 12b and the core layer 13b.

[0271] Of the core layers 13a and 13b, a picture-printed layer 40a is provided on the core layer 13a on the surface side, and a protective layer 71a is provided on the picture-printed layer 40a.

[0272] The core layer 13b on the back side is provided with a picture printed layer 40b and a protective layer 71b located on the picture printed layer 40b.

[0273] As described above, the picture-printed layer 40a and the protective layer 71a are provided in this order from the inside to the outside on the front-side core layer 13a, and the picture-printed layer 40b and the protective layer 71b are provided in this order on the back-side core layer 13b.

[0274] The picture-printed layers 40a and 40b are obtained by applying ink to form a picture print, and the protective layers 71a and 71b are formed by applying ink onto the picture-printed layers 40a and 40b.

[0275] In the present embodiment, protective layers 71a and 71b contain ink kneaded with an antiviral agent for forming coating layer 61a shown in Fig. 13. Among these, inks for forming protective layers 71a and 71b may have the following configurations.

[0276] Cyclohexanone, content 30.0-35.0%, coal tar naphtha, content 25.0-30.0%, acrylic resin, content 25.0-30.0%, cellulose resin, content 3.0-5.0%, vinyl chloride / vinyl acetate resin, content 3.0-5.0%, trimethylbenzene, content 3.0% or less, toluene (227), content 2.0% or less, antioxidant, content 2.0% or less, wax, content 1.0% or less, polyester resin, content 1.0% or less, ultraviolet absorber, content 0.5% or less.

[0277] The antiviral agent in the protective layers 71a and 71b can be the same as the antiviral agent contained in the coating layer 61. In this way, ink containing an antiviral agent can be used for the protective layers 71a and 71b. The inclusion of an antiviral agent can prevent viruses from adhering to the front and back surfaces of the card.

[0278] In this embodiment, the protective layers 71a and 71b are located on the outermost surface of the front side and the outermost surface of the back side.

[0279] In this embodiment, the protective layers 71a and 71b located on the outermost surfaces on the front and back sides are called third antiviral layers.

[0280] As described above, according to the present embodiment, protective layers 71a and 71b serving as third antiviral layers are formed on the front and back sides of IC card 10. Because protective layers 71a and 71b are sufficiently thin (0.1 to 2.0 μm), the antiviral agent in protective layers 71a and 71b easily appears on the outer surface, enabling them to exhibit a high antiviral function.

[0281] Furthermore, protective layers 71a and 71b, which serve as the second antiviral layers, are formed by preparing ink containing an antiviral agent and applying this ink. In this case, there is no need to excessively heat the ink for protective layers 71a and 71b to form coating layer 61a and release layer 67. This prevents the antiviral agent in the ink from deteriorating.

[0282] Of the picture-printed layers 40a and 40b and the protective layers 71a and 71b, only the picture-printed layer 40a and the protective layer 71a may be provided.

[0283] <Tenth embodiment> The tenth embodiment will be described below with reference to the drawings.

[0284] Fig. 15 is a diagram showing a tenth embodiment of the present disclosure. As an example of a laminate that does not include an IC module, a card 10B incorporating a laminate that does not include an IC module will be described with reference to Fig. 15. Note that the laminate that does not include an IC module is not limited to card 10B, and may be incorporated into a booklet.

[0285] As will be described later, card 10B includes magnetic recording section 19, and a picture print 16A appears on the surface of card 10B (see FIG. 5).

[0286] Next, a card 10B constituting a laminated body that does not include an IC module will be described with reference to FIG.

[0287] Card 10B has a laminated structure 10A that does not include an IC module. Card 10B having laminated structure 10A includes a core body 13 including a pair of core layers 13a and 13b, and a pair of over-sheet layers 60 and 61 provided on both sides of each of core layers 13a and 13b.

[0288] Furthermore, of the pair of over-sheet layers 60, 61, a concealing layer 15 is provided on the surface side of the over-sheet layer 60, a picture print layer 16 (see Figure 5) located on the concealing layer 15 and including a picture print 16A, and a peel-off layer 67 made of a transparent body located on the picture print layer 16.

[0289] Further, the over-sheet layer 60 on the front side and the over-sheet layer 61 on the back side are provided with a magnetic recording section 19, and the magnetic recording section 19 on the front side is covered with a concealing layer 15 so that it cannot be seen from the outside.

[0290] Next, each of the over-sheet layers 60 and 61 will be described.

[0291] The oversheet layers 60 and 61 are both made of transparent polycarbonate (PC) or polyvinyl chloride (PVC).

[0292] A coating layer 61a containing an antiviral agent is provided on the lower surface (outer surface) of the back-side over-sheet layer 61. The back-side over-sheet layer 61 and the coating layer 61a form an over-sheet body 61A having antiviral properties (see FIG. 15).

[0293] In this embodiment, a coating layer 61a is provided on the over-sheet layer 61 on the back side, and the magnetic recording section 19 is actually provided on this coating layer 61a.

[0294] The coating layer 61a provided on the over-sheet layer 61 on the back side serves as a first antiviral layer containing an antiviral agent.

[0295] A laminated structure 10A is formed from the pair of core layers 13a and 13b and the pair of over-sheet layers 60 and 61 provided on both sides of the pair of core layers 13a and 13b.

[0296] Incidentally, the resin that is the material for the pair of core layers 13a, 13b of card 10B that constitutes the laminate is not particularly limited, but specific examples include synthetic resins such as polyvinyl chloride resin, vinyl acetate resin, vinyl chloride-vinyl acetate copolymer resin, butadiene resin, acrylonitrile-butadiene-styrene copolymer resin, polycarbonate resin, polyamide resin, cellulose resin, polyester, polyolefins such as polyethylene and polypropylene, polyvinyl alcohol, acrylic resin, polymethyl methacrylate resin, styrene resin, urethane resin, fluororesin, and mixtures thereof.

[0297] On the over-sheet layer 60 on the surface side, a concealing layer 15, a picture printed layer 16, and a release layer 67 are provided in this order from the inside to the outside.

[0298] In this embodiment, the concealing layer 15 includes, for example, silver, black, gold, or red, and the silver concealing layer is made of aluminum.

[0299] The picture print layer 16 is obtained by applying ink to form the picture print 16 A. Although the picture print layer 16 in Fig. 15 is a solid print on the entire surface of the layer, the picture print layer 16 may also be a partial print like the picture print 16 A in Fig. 5.

[0300] The above-mentioned concealing layer 15 and picture printing layer 16 are provided in advance on a transfer sheet substrate (not shown) via a peeling layer 67, and the concealing layer 15 and picture printing layer 16 are formed on the over-sheet layer 60 by transferring the concealing layer 15 and picture printing layer 16 on the transfer sheet substrate together with the peeling layer 67 onto the over-sheet layer 60 on the surface side.

[0301] In this embodiment, release layer 67 is made of a transparent material and is obtained from ink kneaded with an antiviral agent similar to the antiviral agent contained in coating layer 61a. Among these, the ink for forming the release layer may have the following composition: Resin 1 (acrylic resin) content of 20 to 30%, Resin 2 (vinyl chloride-vinyl acetate resin) content of 5% or less, Resin 3 (polyester resin) content of 1% or less, UV absorber content of 2% or less, methyl ethyl ketone content of 30 to 40%, toluene (300) content of 34.0 to 36.0%, and polyethylene wax content of 1% or less.

[0302] The antiviral agent in release layer 67 can be the same as the antiviral agent contained in coating layer 61a as described above, and the weight ratio of the antiviral agent in release layer 67 is 2 to 4%.

[0303] In this embodiment, the release layer 67 is located on the outermost surface of the front side, and the coating layer 61a provided on the over-sheet layer 61 on the back side is located on the outermost surface of the back side.

[0304] Therefore, the release layer 67 located on the outermost surface of the front side can also be called a second antiviral layer, in comparison with the coating layer (first antiviral layer) located on the outermost surface of the back side.

[0305] As described above, according to this embodiment, by providing coating layer 61a containing an antiviral agent on over-sheet layer 61 on the back side of card 10B, it is possible to impart a high antiviral function to the back side of IC card 10.

[0306] Furthermore, when the concealing layer 15 and the picture printed layer 16 are transferred onto the oversheet layer 60 on the front side of the card 10B, an antiviral agent is kneaded into the peeling layer 67 remaining on the picture printed layer 16 side, so that the front side of the card 10B can have a high antiviral function.

[0307] Of the over-sheet layers 60 and 61, the over-sheet layer 60 does not necessarily have to be provided, and only the over-sheet layer 61 may be provided. Also, instead of the over-sheet layer 60, an over-sheet layer 61 provided with a coating layer 61a containing an antiviral agent may be provided. Even with this configuration, it is possible to provide a high antiviral function on both the front and back surfaces of the card. Moreover, an oversheet layer 61 provided with a coating layer 61a containing an antiviral agent may be provided instead of the transfer layer consisting of the concealing layer 15, the picture printed layer 16, and the peeling layer 67. This configuration also allows the front and back surfaces of the card to have a high antiviral function. [Explanation of symbols]

[0308] 4 Middle layer 5 First antibacterial layer 6 First antibacterial layer 10 IC Card 10A laminated structure 10B card 12 Antenna built-in layer 12a Antenna cover layer 12b Antenna mounting layer 13 Core Body 13a Core layer 13b Core layer 14a Oversheet layer 14b Oversheet layer 15 Hidden Layer 16 Picture printing layer 17 Peeling layer 19 Magnetic Recording Unit 20 IC modules 25 Antenna 27 Conductive paste 28 Conductive Plate 30 recess 31 Aperture 40a Picture printing layer 40b Picture printing layer 41a Protective layer 41b Protective layer 60 oversheet layers 61 Oversheet layer 61a Coating layer 61A Oversheet body 67 Peeling layer 71a Protective layer 71b Protective layer

Claims

1. In an information stack having an IC module built in, an antenna-embedded layer having an antenna connected to the IC module; a pair of core layers provided on both sides of the antenna-embedded layer; an oversheet layer provided on the outer surface of the pair of core layers, Each over-sheet layer is provided on one side of the intermediate layer and contains an antibacterial or antifungal agent. a first antibacterial or antiviral layer containing a viral agent; The first antibacterial or antiviral layer of one of the over-sheet layers is On the other oversheet layer, a concealing layer and a design layer are provided, and on the design layer, A release layer is provided which is peeled from the transfer sheet, and this release layer is the first antibacterial or antiviral and a layer located on the outermost surface of the information laminate opposite the antibacterial or antiviral agent. The information laminate comprises a second antibacterial or antiviral layer having

2. 2. The information stack according to claim 1, wherein the IC module is provided in the antenna built-in layer. body.

3. 2. The information stack according to claim 1, wherein the IC module is exposed to the outside of the information stack.

4. 10. The method of claim 1, wherein the first antibacterial or antiviral layer contains a boron-based compound as an antibacterial agent.

4. The information stack according to any one of claims 1 to 3.

5. The middle layer of the over-sheet layer is a laser light coloring layer that develops color when irradiated with laser light.

5. The information laminate according to claim 1, comprising:

6. The first antibacterial or antiviral layer and the second antibacterial or antiviral layer contain the same antibacterial agent or 6. The information laminate according to claim 1, wherein the information laminate contains the same antiviral agent.

7. The release layer may contain, as an antibacterial or antiviral agent, Resin 1 (acrylic resin) content: 20-30%, Resin 2 (vinyl chloride-acetate resin) content: 5% or less, Resin 3 (polyester resin) content 1% or less, UV absorber content 2% or less, methyl ether Chile ketone, content 30 to 40%, toluene, content 34.0 to 36.0%, Polyethylene wax, content less than 1%, 7. The information stack according to claim 1, comprising: a silver oxide-zinc calcium phosphate layer;

8. A card having the information laminate according to any one of claims 1 to 7.

9. A booklet comprising the information laminate according to any one of claims 1 to 7.

Images