Transfer overlay film and antiviral cards

Abstract

To provide a transfer overlay film having antiviral properties, capable of imparting excellent antiviral properties to a transfer target while improving designability of the transfer target, an antiviral card using the transfer overlay film, a manufacturing method of an antiviral card, and a bonding roller to be used for manufacturing an antiviral card.SOLUTION: A transfer overlay film 1 having antiviral properties includes a base material sheet 11 and a transfer film 21 formed on one side of the base material sheet 11. The transfer film 21 is formed with a plurality of layers containing an antiviral agent. At least one layer from among the plurality of layers contains an organic antiviral agent as the antiviral agent.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a transfer overlay film capable of transferring an antiviral resin film onto the surface of various articles, an antiviral card that is a card-type medium made primarily of resin and used as an information recording medium, and in which the transfer overlay film imparts antiviral properties to the outermost layer, a manufacturing method thereof, and a lamination roller used in manufacturing the antiviral card. [Background technology]

[0002] In recent years, demand for antibacterial and antiviral properties has increased, and the development of antiviral products with antiviral properties has become an urgent need. Accordingly, there is an increasing need to impart antibacterial and antiviral properties to card-type media such as ID cards, which are frequently touched by people.

[0003] Conventionally, transfer foils (transfer sheets) have been known that impart antiviral properties to the surface of an article by transferring an antiviral resin layer onto the surface of the article, thereby coating the surface of the article with the resin layer. For example, Patent Document 1 proposes a thermal transfer sheet and intermediate transfer medium that have antibacterial properties by incorporating an antibacterial agent into the release layer of the thermal transfer sheet. Furthermore, Patent Document 2 proposes an antiviral transfer sheet and an antiviral shrink film having a functional layer formed of a predetermined amount of an inorganic antiviral agent and a resin. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6849031 [Patent Document 2] Patent No. 6159895 Summary of the Invention [Problem to be solved by the invention]

[0005] For example, the thermal transfer sheet and intermediate transfer medium disclosed in Patent Document 1 contain an inorganic antibacterial agent and have antibacterial properties, but their antiviral properties have not been examined. Furthermore, for the inorganic antibacterial agent to have effective antiviral properties, a large amount must be added. However, if the content of the inorganic antibacterial agent increases, the thermal transfer sheet becomes cloudy, which may impair the design of the transferred object.

[0006] Furthermore, reducing the amount of antiviral agent kneaded into the resin suppresses clouding of the sheet, ensuring design. However, in the configuration of the transfer sheet or shrink film disclosed in Patent Document 2, for example, if the amount of antiviral agent present in the functional layer that becomes the outermost layer of the transfer target after transfer decreases, the antiviral agent becomes less likely to come into contact with viruses, and as a result, the antiviral effect may not be fully exerted.

[0007] The present invention has been made in consideration of these problems, and has an object to provide a transfer overlay film that can impart excellent antiviral properties to an object to which a transfer is made and improve the design of the object to which a transfer is made, an antiviral card using the transfer overlay film, a method for manufacturing an antiviral card, and a lamination roller used in manufacturing an antiviral card. [Means for solving the problem]

[0008] In order to solve the above problems, a transfer overlay film according to one embodiment of the present disclosure includes a base sheet and a transfer film formed on one surface of the base sheet, wherein the transfer film is formed of multiple layers containing an antiviral agent, and at least one of the multiple layers contains an organic antiviral agent as the antiviral agent.

[0009] Furthermore, an antiviral card according to one aspect of the present disclosure is characterized by including a core substrate and the transfer film of the transfer overlay film laminated on at least one surface side of the core substrate.

[0010] Furthermore, a method for manufacturing an antiviral card according to one aspect of the present disclosure is characterized in that one surface of a core substrate and a transfer film of a transfer overlay film are arranged opposite each other, an image receiving layer located on the surface side of the core substrate, and lamination is performed with the image receiving layer located on the surface of the transfer film, which is one of the layers of the transfer film, arranged on the one surface side of the core substrate, and the transfer film is transferred to the one surface of the core substrate.

[0011] Furthermore, a laminating roller according to one aspect of the present disclosure is a laminating roller used for the laminating process in the above-described method for manufacturing an antiviral card, and is characterized in that it has a recess on its surface, and the surface area of ​​the inner surface of the recess is larger than the area of ​​one surface of the core substrate of the antiviral card. [Effects of the Invention]

[0012] According to aspects of the present disclosure, it is possible to provide a transfer overlay film that imparts excellent antiviral properties to the surface of an object to be transferred and can improve the design of the object to be transferred, an antiviral card using the transfer overlay film, a method for manufacturing an antiviral card, and a lamination roller used in manufacturing an antiviral card. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a cross-sectional view showing an example of a configuration of a transfer overlay film according to a first embodiment of the present disclosure. [Figure 2] FIG. 10 is a cross-sectional view showing a configuration example of an antiviral card according to a second embodiment of the present disclosure. [Figure 3] FIG. 10 is a plan view showing a configuration example of an antiviral card according to a second embodiment of the present disclosure. [Figure 4] FIG. 10 is a conceptual diagram showing an example of a lamination method for an antiviral card according to a second embodiment of the present disclosure. [Figure 5] FIG. 10 is a diagram showing an example of a method for manufacturing an antiviral card according to a second embodiment of the present disclosure. [Figure 6]FIG. 10 is a cross-sectional view showing a configuration example of an antiviral card according to a third embodiment of the present disclosure. [Figure 7] FIG. 10 is a conceptual diagram showing an example of a lamination method for an antiviral card according to a third embodiment of the present disclosure. [Figure 8] FIG. 10 is a diagram showing an example of a method for manufacturing an antiviral card according to a third embodiment of the present disclosure. [Figure 9] FIG. 11 is a front perspective view showing an example of the configuration of a laminating roller used when manufacturing an antiviral card according to a third embodiment of the present disclosure. [Figure 10] 10 is a diagram showing an example of the mechanism of the laminating roller shown in FIG. 9. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The drawings are schematic, and the relationship between thickness and planar dimensions, the thickness ratio of each layer, etc., differ from the actual ones. Furthermore, the embodiments shown below are merely examples of configurations for embodying the technical idea of ​​the present invention, and the technical idea of ​​the present invention is not limited to the materials, shapes, structures, etc. of the components described below. The technical idea of ​​the present invention can be modified in various ways within the technical scope defined by the claims. In the following description, the side of the transfer overlay film that comes into contact with the object to be transferred is sometimes referred to as "upper," and the side opposite to the side that comes into contact with the object to be transferred (the base sheet side) is sometimes referred to as "lower."

[0015] In addition, in this disclosure, "antiviral" is a general term that refers to antiviral, which indicates the inactivation of viruses, and antibacterial, which indicates the prevention of bacterial proliferation. Similarly, "antibacterial" is a general term that refers to antiviral and antibacterial. Unless otherwise specified, in this disclosure, antiviral and antibacterial each refer to both individually. Hereinafter, each aspect of each embodiment of the present disclosure will be described with reference to the drawings.

[0016] 1. First embodiment (Basic composition of transfer overlay film 1) The basic configuration of a transfer overlay film according to a first embodiment of the present invention (hereinafter referred to as "this embodiment") will be described with reference to Fig. 1. Fig. 1 is a cross-sectional schematic diagram showing the general configuration of a transfer overlay film 1 of this embodiment. As shown in FIG. 1, the transfer overlay film 1 according to this embodiment includes a base sheet 11 and a transfer film 21 formed on one surface of the base sheet 11. The transfer overlay film 1 is formed, for example, in a sheet shape and is also called a transfer sheet or transfer foil. Depending on the manufacturing method, the transfer overlay film 1 can be formed in a roll shape. Furthermore, by forming the roll-shaped transfer overlay film into a sheet, a sheet-shaped transfer overlay film can be formed. The transfer overlay film 1 is a laminate in which the transfer film 21 is laminated on the base sheet 11.

[0017] In the transfer overlay film 1, the transfer film 21 is a thin overlay film that is transferred to a transfer target and thereby provides the transfer target with properties such as scratch resistance, abrasion resistance, and contamination resistance. As shown in Fig. 1, in this embodiment, the transfer film 21 is composed of multiple layers (three layers in this example). The transfer film 21 is a laminate formed by laminating a release layer 12, an anchor layer 13, and an image-receiving layer 14 in this order on one side of a base sheet 11. As will be described in detail later, in the transfer overlay film 1 according to this embodiment, the multiple layers of the transfer film 21 contain an antiviral agent. Therefore, the transfer film 21 can impart antiviral properties to the object to which the transfer is to be made.

[0018] The transfer overlay film 1 according to this embodiment can be transferred to an object by, for example, arranging the image receiving layer 14, located on the opposite side of the transfer film 21 from the base sheet 11, on the surface side of the object to be transferred, and peeling off the surface of the transfer film 21 that contacts the base sheet 11, i.e., the release layer 12, from the base sheet 11. This allows the transfer film 21 to be used as the layer (outermost layer) located on the top surface (outermost surface) of the object to be transferred.

[0019] There is no particular limitation on the object onto which the transfer overlay film 1 is transferred; for example, by transferring the transfer film 21 onto the surface of a card-type medium (hereinafter simply referred to as a "card"), the transfer film 21 can be used as the outermost layer of the card. Cards that can be transferred can be used for a variety of purposes, including commuter passes, train tickets, admission tickets, prepaid cards, credit cards, cash cards, point cards, various securities, identification cards, etc. In particular, the transfer overlay film 1 according to this embodiment can be suitably used as an overlay film for ID cards, which have an image for personal authentication, including a photograph of an individual's face, printed on the face (surface of the card).

[0020] Furthermore, the base sheet 11 serves as a support for the transfer film 21 in the transfer overlay film 1. As will be described in detail later, in the transfer overlay film 1 according to this embodiment, both the base sheet 11 and the transfer overlay film 1 are made of a resin material. In other words, the transfer overlay film 1 is a laminate of resin materials. Each layer of the base sheet 11 and the transfer film 21 will be described in detail below.

[0021] (Base sheet 11) The substrate sheet 11 is a layer that serves as the substrate of the transfer overlay film 1. In this embodiment, a thermoplastic resin can be used for the substrate sheet 11. Examples of thermoplastic resins include polyolefin resins such as polyethylene, polypropylene, polymethylpentene, polybutene, ethylene-propylene copolymer, ethylene-α-olefin copolymer, and propylene-α-olefin copolymer; polyolefin-based resins such as olefin-based copolymer resins such as ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, ethylene-(meth)acrylic acid (ester) copolymer, and ethylene-unsaturated carboxylic acid copolymer metal neutralized product (ionomer); polyethylene terephthalate, glycol-modified polyethylene terephthalate, polybutylene terephthalate, polytetramethylene terephthalate, polyethylene naphthalate, polyethylene terephthalate-isophthalate copolymer, 1,4-cyclohexanedimethanol copolymerized polyethylene terephthalate, polya Examples of the resin that can be used include polyester resins such as acrylate and polycarbonate, acrylic resins such as poly(meth)acrylonitrile, polymethyl(meth)acrylate, polyethyl(meth)acrylate, polybutyl(meth)acrylate, and polyacrylamide, polyamide resins such as 6-nylon, 6,6-nylon, and 6,10-nylon, styrene resins such as polystyrene, AS resin, and ABS resin, vinyl resins such as polyvinyl chloride, polyvinyl acetate, polyvinyl alcohol, polyvinyl acetal, polyvinyl butyral, and vinyl chloride-vinyl acetate copolymer, and fluorine-based resins such as polyvinyl fluoride, polyvinylidene fluoride, polytetrafluoroethylene, ethylene-tetrafluoroethylene copolymer, and ethylene-perfluoroalkyl vinyl ether copolymer, as well as mixtures, copolymers, composites, and laminates of two or more of these resins.

[0022] The base sheet 11 may be formed into a roll, such as a transfer overlay ribbon 71 used in a printing device 7 shown in Fig. 7, which will be described later, and wound around a cylindrical tubular unwinding roll. For this reason, among thermoplastic resins, polyethylene terephthalate (PET) and polyethylene naphthalate (PEN) are preferably used as the material for the base sheet 11. When polyethylene terephthalate is used as the material for the base sheet 11, for example, transparent biaxially oriented PET may also be used.

[0023] The thickness of the base sheet 11 is not particularly limited, but is preferably in the range of 9 μm to 300 μm inclusive, taking into consideration the transportability of the printer 7. Furthermore, taking into consideration the formation of a multicolor image by the thermal head 73 in the printer 7 shown in FIG. 7 (described later) and the heating by a hot roll when transferring the transfer film 21 to the card surface, the thickness is preferably in the range of 12 μm to 100 μm inclusive.

[0024] (Transfer film 21) The transfer film 21 is a layer formed on one surface of the base sheet 11 as shown in FIG. 1. As described above, the transfer film 21 is formed of multiple layers containing an antiviral agent, which will be described in more detail below. At least one of the multiple layers in the transfer film 21 contains an organic antiviral agent as the antiviral agent. This imparts excellent antiviral properties to the transfer target (card) and suppresses clouding of the transfer film 21, thereby improving the design of the transfer target. The antiviral agent will be described in more detail below. A transfer overlay film that has been given antiviral properties by containing an antiviral agent is called an "antiviral transfer overlay film." It may also be called an "antiviral transfer foil."

[0025] 1, the transfer overlay film 1 according to this embodiment is formed by stacking multiple layers to form a transfer film 21. More specifically, in this embodiment, the transfer film 21 has a release layer 12 in contact with one surface of the base sheet 11, an image receiving layer 14 located on the surface side of the transfer film 21, and an anchor layer 13 located between the release layer 12 and the image receiving layer 14. In the transfer overlay film 1 according to this embodiment, each layer of the transfer film 21 (the release layer 12, the anchor layer 13, and the image-receiving layer 14) is coated on one surface of the base sheet 11 by, for example, gravure coating. However, this is not limiting, and each layer of the transfer film 21 may be coated on the base sheet 11 by various coating methods such as roll coating.

[0026] Furthermore, it is preferable that each layer of the transfer film 21 has a transparency (colorless transparent, colored transparent, translucent) sufficient to allow the image (letters, patterns, pictures, etc.) applied to a card, which is an example of a transfer target of the transfer film 21, or to a picture printing layer (picture printing layer 15 shown in Figure 4 described later) formed on the image receiving layer 14 during the card manufacturing process to be seen through. The release layer 12, anchor layer 13 and image receiving layer 14 that form the transfer film 21 will be described in detail below.

[0027] [Release layer 12] The release layer 12 is a layer that forms the outermost surface of the transfer target (card) and is a layer that ensures the surface strength of the transfer target and improves its suitability for post-processing. The release layer 12 is also called a "protective release layer" because it covers the outermost surface of the transfer target to protect the surface of the transfer target. The release layer 12 also has a mechanism that allows the interface between the base sheet 11 and the release layer 12 to peel off when the transfer film 21 is transferred to the transfer target (e.g., a card).

[0028] The release layer 12 is composed of an antiviral agent and a resin material. Furthermore, the release layer 12 is preferably optically transparent and essentially colorless and transparent. Therefore, the resin material for the release layer 12 can be, for example, polycarbonate resin, acrylic resin, polyester resin, fluorine-based acrylic resin, acrylic silicone resin, epoxy acrylate resin, polystyrene resin, cycloolefin polymer, methylstyrene resin, epoxy acrylate resin, cellulose ester resin, polyacetal resin, etc., either alone or in combination of two or more. These resins can also be supplemented with silicone resin, fluorine-based powder, additives, polyethylene wax, various natural waxes, synthetic hydrocarbon waxes, aliphatic alcohol and acid waxes, fatty acid ester and glycerite waxes, amine and amide waxes, higher fatty acid metal salts, etc. As described above, release layer 12 contains an antiviral agent. Therefore, from the viewpoint of compatibility between the material of release layer 12 and the antiviral agent, release layer 12 preferably contains an acrylic resin, more specifically, preferably has an acrylic resin as its main component. In this embodiment, the thickness of the release layer 12 is preferably in the range of 0.5 μm to 3.0 μm, inclusive. When the thickness of the release layer 12 is in this range, the durability and processability of the release layer 12 can be improved.

[0029] [Anchor layer 13] The anchor layer 13 is a layer that comes into contact with the release layer 12, and is formed on the transfer film 21 on the side opposite to the base sheet 11. The anchor layer 13 is provided to improve the adhesion between the release layer 12 and the image receiving layer 14. Anchor layer 13 contains an antiviral agent and a resin material. The resin material for anchor layer 13 is not particularly limited, but polyolefin resins such as polyethylene, urethane resins, acrylic resins, polyester resins, epoxy resins, phenolic resins, vinyl acetate resins, etc. can be used alone or in combination of two or more. The thickness of the anchor layer 13 may be any thickness that can enhance the adhesion between the release layer 12 and the image receiving layer 14, and may be in the range of 0.5 μm to 2.0 μm.

[0030] [Image-receiving layer 14] The image receiving layer 14 is a layer formed so that a picture printing layer can be transferred by a printing device during the manufacture of a card (e.g., an ID card) that will be the object to which the transfer film 21 is to be transferred. The picture printing layer has printed thereon an image for personal authentication, such as an individual's facial photograph. The image receiving layer 14 is located on the surface layer opposite the base sheet 11 among the multiple layers of the transfer film 21, and is disposed on the surface side of the object to be transferred upon transfer to the object to be transferred.

[0031] Thermoplastic resins can be used as the material for the image-receiving layer 14. Examples of thermoplastic resins include styrene resins such as polystyrene and poly-α-methylstyrene, acrylic resins such as polymethyl methacrylate and polyethyl acrylate, vinyl resins such as polyvinyl chloride, polyethyl acetate, vinyl chloride-vinyl acetate copolymer, polyvinyl butyral, and polyvinyl acetal, polyester resins, polyamide resins, epoxy resins, polyurethane resins, petroleum resins, ethylene-acrylic copolymers, and ethylene-acrylic ester copolymers, as well as synthetic resins such as rosin, styrene-butadiene rubber, butyl rubber, butadiene-acrylonitrile rubber, polychlorinated olefins, and cellulose derivatives. The image-receiving layer 14 can be primarily composed of one or a mixture of two or more of these thermoplastic resins. The thickness of the image-receiving layer 14 is preferably in the range of 1.0 μm to 7.0 μm, so that when the transfer film 21 is transferred onto the surface of the card substrate during the production of a card to be transferred, for example, the image-receiving layer 14 can fulfill the role of filling in the irregularities on the surface of the card substrate.

[0032] As described above, each layer (peeling layer 12, anchor layer 13, image receiving layer 14) of transfer film 21 of transfer overlay film 1 contains an antiviral agent. This provides excellent antibacterial and antiviral effects on the surface of an article (e.g., a card) that comes into contact with people or objects. Furthermore, even if the outermost layer (peeling layer 12) of the transfer target (card) is scraped off due to scratches caused by rubbing or the like, the antibacterial and antiviral effects of transfer film 21 are maintained because the underlying anchor layer 13 and image receiving layer 14 also contain an antiviral agent. In other words, transfer overlay film 1 according to this embodiment has superior durability of the antiviral effect compared to conventional methods in which an antiviral agent is added to the outermost layer (peeling layer) of the transfer target and exposed to the surface of the transfer target.

[0033] [Antiviral Agents] In this embodiment, the active ingredient of the antiviral agent added to each layer of the transfer film 21 is preferably an organic material. This provides the transfer overlay film 1 of this embodiment with excellent antiviral properties, and further allows it to exhibit a more rapid-acting antiviral effect than antiviral agents made from inorganic materials (inorganic antiviral agents).

[0034] Furthermore, when an inorganic antiviral agent is used as the antiviral agent added to each layer of the transfer film 21, the transfer film 21 may be affected by, for example, cloudiness or discoloration. As described above, if cloudiness or discoloration occurs in the image receiving layer 14 on which the picture printing layer is provided, the visibility of the image and text information formed in the picture printing layer may be reduced, making it difficult for the card to function as a card. For example, if the card to be transferred is an ID card, if cloudiness or discoloration occurs in the image receiving layer 14, which is positioned on the surface side of the picture printing layer, the visibility of the personal identification image, including the individual's facial photograph, and the name and organization information used to identify the individual may be reduced, thereby reducing the personal identification function of the ID card. Furthermore, cloudiness or discoloration of the transfer film 21 not only reduces visibility but may also lead to defective formation of the image (picture print layer) (for example, defective transfer of the heat-melting ribbon).

[0035] In view of these points, it is preferable to use an organic antiviral agent as the antiviral agent added to each layer of the transfer film 21, particularly the image-receiving layer 14. In other words, in the transfer film 21 of the transfer overlay film 1, at least one layer (image-receiving layer 14) of the multiple layers (peel layer 12, anchor layer 13, and image-receiving layer 14) preferably contains an organic antiviral agent as the antiviral agent.

[0036] In the transfer overlay film 1 according to this embodiment, examples of organic antiviral agents that may be added to each layer of the transfer film 21 include halocarban, chlorophenesin, lysozyme chloride, alkyldiaminoethylglycine hydrochloride, isopropylmethylphenol, thymol, hexachlorophene, berberine, thioxolone, salicylic acid and derivatives thereof, benzoic acid, sodium benzoate, parahydroxybenzoic acid esters, parachlormetacresol, benzalkonium chloride, phenoxyethanol, isopropylmethylphenol, carbolic acid, sorbic acid, and potassium sorbate. sodium, hexachlorophene, chlorhexidine chloride, trichlorocarbanilide, thianthol, hinokitiol, triclosan, trichlorohydroxydiphenyl ether, chlorhexidine gluconate, phenoxyethanol, resorcinol, azulene, salicylic acid, zinc pyrithione, mononitroguaiacol sodium, fennel extract, Japanese pepper extract, cetylpyridinium chloride, benzethonium chloride and undecylenic acid derivatives, alkylbenzenesulfonic acid or a salt thereof, a copolymer containing styrenesulfonate, and anionic sodium salts.

[0037] In this embodiment, each layer of the transfer film 21 may contain only one type of the organic antiviral agent described above, or may contain two or more types of organic antiviral agents.

[0038] Thus, in the transfer overlay film 1 according to this embodiment, each layer of the transfer film 21 (peeling layer 12, anchor layer 13, image-receiving layer 14) contains a resin material and an antiviral agent (e.g., an organic antiviral agent) as main components. By containing a resin material and an antiviral agent in each layer of the transfer film 21, the resin material acts as a binder, which prevents loss of the antiviral agent during the manufacturing process of the transfer overlay film 1, during transfer processing onto the surface of a card (an example of a transfer target), and in the user's card usage environment, thereby maintaining antiviral performance.

[0039] In this embodiment, the content of the organic antiviral agent in each layer of the transfer film 21, i.e., the release layer 12, the anchor layer 13, and the image-receiving layer 14, is preferably within the range of 8 parts by mass to 17 parts by mass, based on 100 parts by mass of the resin in each layer. By ensuring that the content of the antiviral agent falls within this range, it is possible to reliably impart excellent antiviral properties to the transfer overlay film 1, and as a result, it is possible to reliably impart excellent antiviral properties to the transfer target (card). Furthermore, clouding of the transfer overlay film 1 can be further suppressed, improving the design of the transfer target.

[0040] On the other hand, if the content of the organic antiviral agent in each layer of the transfer film 21 is less than 7 parts by mass relative to 100 parts by mass of the resin in each layer of the transfer film 21, the antiviral effect may not be stable and may be reduced. Also, if the content of the antiviral agent exceeds 17 parts by mass relative to 100 parts by mass of the resin in each layer of the transfer film 21, the clouding of the transfer film 21 may not be sufficiently suppressed, and the design of the transfer target may be reduced. Furthermore, if the content of the antiviral agent exceeds 17 parts by mass, the transfer performance of the transfer film 21 to the transfer target may be reduced, or the suitability for post-processing of the surface of the transfer target after the transfer film 21 is transferred may be reduced.

[0041] Furthermore, the content of the organic antiviral agent in each layer of the transfer film 21 is more preferably within the range of 8 parts by mass to 12 parts by mass relative to 100 parts by mass of the resin in each layer of the transfer film 21. By having the content of the antiviral agent within this range, it is possible to reliably impart excellent antiviral properties to the object to be transferred, and further suppress clouding of the transfer film 21, thereby more effectively maintaining the design of the object to be transferred.

[0042] Furthermore, from the viewpoint of exerting an antiviral effect against enveloped viruses such as influenza virus, herpes virus, AIDS virus, and hepatitis B virus, it is preferable that the content of the organic antiviral agent in each layer of the transfer film 21 be 5 parts by mass or more per 100 parts by mass of the resin in each layer of the transfer film 21. Furthermore, from the viewpoint of exerting an antiviral effect against non-enveloped viruses such as norovirus, feline calicivirus, rhinovirus, and adenovirus, the content of the organic antiviral agent in each layer of the transfer film 21 is preferably 8 parts by mass or more per 100 parts by mass of the resin in each layer of the transfer film 21.

[0043] In the present invention, the antiviral agent contained in the release layer 12 and the anchor layer 13 of the transfer film 21 is not limited to an organic antiviral agent. The release layer 12 and the anchor layer 13 may contain an inorganic antiviral agent. The inorganic antiviral agent is preferably a silver-based material in terms of antiviral effect. Examples of inorganic antiviral agents that can be used include antibacterial zeolite, antibacterial apatite, antibacterial zirconia, and the like, which are formed by incorporating metal ions, such as silver ions, copper ions, or zinc ions, into inorganic compounds such as zeolite, apatite, and zirconia. The antiviral agent may also be configured such that a silver-based material is supported on an inorganic material. The "inorganic material" may be, for example, "glass," but is not limited to glass. Supporting silver on an inorganic substance can prevent the silver component from falling off over time and from transferring to base sheet 11. Since inorganic antiviral agents have excellent durability of their antiviral effect, adding an inorganic antiviral agent can further improve the durability of the antiviral effect.

[0044] Furthermore, release layer 12 and anchor layer 13 may contain only one type of the inorganic antiviral agent, or may contain two or more types of inorganic antiviral agents. When an inorganic antiviral agent is used in at least one of release layer 12 and anchor layer 13, the content of the inorganic antiviral agent in each of release layer 12 and anchor layer 13 is preferably within the range of 0.7 parts by mass to 3.0 parts by mass, and more preferably within the range of 1 part by mass to 2 parts by mass, per 100 parts by mass of resin. This allows transfer overlay film 1 to impart excellent antiviral properties due to the inorganic antiviral agent to the transfer target object, while suppressing cloudiness (clouding) or discoloration of the layer containing the inorganic antiviral agent (at least one of release layer 12 and anchor layer 13), thereby improving the design of the transfer target object.

[0045] As described above, in this embodiment, the multiple layers in the transfer film 21 (peel layer 12, anchor layer 13, and image-receiving layer 14) are all formed to contain a resin and an antiviral agent, and the multiple layers are configured from layers containing either an organic antiviral agent or an inorganic antiviral agent as the antiviral agent (peel layer 12 and anchor layer 13 in this example), and a layer containing an organic antiviral agent as the antiviral agent (image-receiving layer 14 in this example). As a result, transfer overlay film 1 can impart a superior antiviral effect to the object to be transferred, by virtue of the layer that exhibits a long-lasting antiviral effect due to the inorganic antiviral agent and the layer that exhibits a fast-acting antiviral effect due to the organic antiviral agent.

[0046] Specifically, in the transfer film 21, each of the release layer 12 and the anchor layer 13 contains either an organic antiviral agent or an inorganic antiviral agent as the antiviral agent, and the image-receiving layer 14 contains an organic antiviral agent as the antiviral agent. As a result, the transfer overlay film 1 can exhibit a long-lasting antiviral effect in the release layer 12 and anchor layer 13 arranged on the surface side of the transfer target, and can also exhibit a fast-acting antiviral effect in the image-receiving layer 14. Furthermore, it can reliably suppress turbidity (e.g., cloudiness) and discoloration in the image-receiving layer 14, thereby reliably improving the design of the transfer target.

[0047] As described above, in the transfer overlay film 1 according to this embodiment, each layer of the transfer film 21 contains an antiviral agent. Here, the transfer film 21 may be configured so that either the release layer 12 or the anchor layer 13 contains an inorganic antiviral agent as the antiviral agent, and the other contains an organic antiviral agent as the antiviral agent. In other words, the types of antiviral agents may be different between the release layer 12 and the anchor layer 13. This allows either an organic antiviral agent or an inorganic antiviral agent to be appropriately selected as the antiviral agent used in layers other than the image-receiving layer 14, depending on the application of the transfer target (e.g., a card) and the environment in which it will be used.

[0048] Furthermore, the transfer film 21 may be configured so that both the release layer 12 and the anchor layer 13 contain an organic antiviral agent. That is, the transfer film 21 may be configured so that each of the release layer 12, the anchor layer 13, and the image-receiving layer 14 contains an organic antiviral agent. This allows the transfer overlay film 1 to impart a more excellent antiviral effect (particularly a fast-acting antiviral effect) to the object to which the transfer is made, and also further improves the design of the object to which the transfer is made.

[0049] The transfer film 21 may also be configured so that both the release layer 12 and the anchor layer 13 contain an inorganic antiviral agent. In other words, the transfer film 21 may be configured so that a layer other than the image-receiving layer 14 contains an inorganic antiviral agent. This allows the transfer overlay film 1 to exhibit long-lasting antiviral properties on the surface layer side of the card, and to exhibit more immediate and excellent antiviral properties in the image-receiving layer 14 on the base side of the card. In addition, cloudiness and discoloration of the image-receiving layer 14 can be suppressed, further improving the design of the transfer target (card).

[0050] Furthermore, in the transfer overlay film 1 according to this embodiment, the content of the antiviral agent in each layer of the transfer film 21 may be the same or different, but it is more preferable that they are the same. Furthermore, when the contents of the antiviral agent differ in each layer of the transfer film 21, it is preferable that the release layer 12 of the transfer film 21 has the highest content of the antiviral agent, i.e., the release layer 12 has a higher content of the antiviral agent than the anchor layer 13 and the image receiving layer 14. This allows a more excellent antiviral effect to be exhibited on the surface of the transfer film 21 transferred to the transfer target (for example, the outermost surface of a card). In this case, the release layer 12 may have the highest content of the antiviral agent, the anchor layer 13 may have the next highest content of the antiviral agent, and the image receiving layer 14 may have the lowest content of the antiviral agent, i.e., the contents of the antiviral agent may decrease in the order of the release layer 12, the anchor layer 13, and the image receiving layer 14. Alternatively, the image receiving layer 14 may have a higher content of the antiviral agent than the anchor layer 13. Furthermore, for example, the transfer film 21 may have a configuration in which the content of the antiviral agent is highest in the image receiving layer 14 among the multiple layers thereof, that is, the content of the antiviral agent in the image receiving layer 14 is higher than the content of the antiviral agent in each of the peeling layer 12 and the anchor layer 13. This allows for a more excellent antiviral effect to be exhibited inside the transfer film 21 transferred to the transfer target (for example, on the card substrate side), and also suppresses cloudiness and discoloration of the entire transfer film 21, thereby more reliably improving the design of the transfer target. In this case, the antiviral agent content may be the highest in the image receiving layer 14, the next highest in the anchor layer 13, and the lowest in the release layer 12; that is, the antiviral agent content may decrease in the order of the image receiving layer 14, the anchor layer 13, and the release layer 12. Furthermore, the release layer 12 may have a higher content of the antiviral agent than the anchor layer 13. In this way, by appropriately setting the content of the antiviral agent in each layer of the transfer film 21, it is possible to impart an antiviral effect to the object to be transferred (e.g., a card) that is appropriate for the environment in which the object is used, the environment in which it is stored, etc.

[0051] [Film thickness of each layer of transfer film 21] The thickness of each layer of the transfer film 21 (the release layer 12, the anchor layer 13, and the image receiving layer 14) is as described above. In the transfer film 21, it is preferable that the image receiving layer 14 on which the picture printing layer is provided has the thickest film thickness. This can prevent defective formation of the picture printing layer. Furthermore, in the transfer film 21, when the content of the antiviral agent in the image receiving layer 14 is the highest, making the film thickness of the image receiving layer 14 thicker than the other layers can more reliably impart excellent antiviral properties to the object to be transferred. Furthermore, it is preferable that the release layer 12 has a thicker film thickness than the anchor layer 13. The anchor layer 13 is provided to more firmly adhere the release layer 12, which protects the surface of the transfer target (card), to the image receiving layer 14, on which an image is formed by the thermal transfer printing ribbon. Therefore, the film thickness of the anchor layer 13 need only be thick enough to sufficiently adhere the release layer 12 and the image receiving layer 14. Furthermore, if the film thickness of the anchor layer 13 is too thick, the effect of the release layer 12 (the effect of surface protection) may not be maintained. Therefore, it is preferable that the film thickness relationship between the release layer 12 and the anchor layer 13 be "film thickness of the release layer 12 > film thickness of the anchor layer 13."

[0052] Each layer of the transfer film 21 has been described above. Furthermore, the transfer film 21 in the transfer overlay film 1 according to this embodiment may be configured to contain polyethylene wax. More specifically, polyethylene wax may be added to the release layer 12, which forms the outermost surface of the transfer target. This reduces the surface roughness of the transfer film 21, which forms the outermost layer of the transfer target, for example, and reduces the frictional resistance at the outermost surface of the transfer film 21. This imparts scratch resistance and abrasion resistance to the release layer 12, which forms the outermost surface of a card, for example, and as a result, the scratch resistance and abrasion resistance of the transfer target, such as a card, having the release layer 12 as the outermost surface, can be improved.

[0053] The content of polyethylene wax in release layer 12 is preferably within a range of 0.6 parts by mass or more and 1.0 parts by mass or less per 100 parts by mass of the resin in release layer 12. If the content is less than 0.6 parts by mass, scratch resistance and abrasion resistance cannot be imparted, and if the content exceeds 1.0 part by mass, whitening may occur in release layer 12. By keeping the content of polyethylene wax within the above range, it is possible to impart scratch resistance and abrasion resistance to the transfer target object while maintaining the other functions of release layer 12 (antiviral properties, design, durability, adhesion, etc.).

[0054] (Manufacturing method) The transfer overlay film 1 according to this embodiment has the above-described configuration, and its manufacturing method includes the following first and second steps. (1) First step The first step is to prepare the base sheet 11. (2) Second process The second step is a step of forming a transfer film 21 on one surface of the base sheet 11. In the second step, a first resin material to which an antiviral agent (either an organic antiviral agent or an inorganic antiviral agent) has been added is applied to one surface of the base sheet 11 to form a release layer 12, a second resin material to which an antiviral agent has been added is applied onto the release layer 12 to form an anchor layer 13, and a third resin material to which an antiviral agent (an organic antiviral agent) has been added is applied onto the anchor layer 13 to form an image receiving layer 14 on the surface side of the transfer film 21. Methods for adding an antiviral agent to the resin materials (first to third resin materials) that form each layer of the transfer film 21 include a method in which an antiviral agent dissolved in an organic solvent is dispersed in the resin, a method in which the antiviral agent is dispersed in a liquid in which the resin is emulsified with an emulsifier, etc. In this way, in this embodiment, the antiviral agent is added to each layer when the transfer film 21 is formed. The release layer 12, the anchor layer 13, and the image-receiving layer 14 may be coated by various coating methods such as gravure coating. In this case, for example, the image-receiving layer 14 is preferably formed to have a thickness greater than that of the release layer 12 and the anchor layer 13. The content of the antiviral agent in each layer of the transfer film 21 is preferably the same. The content of the antiviral agent in each layer of the transfer film 21 may also be different. In this case, the release layer 12 is preferably formed so that the amount of antiviral agent added is greater than that in the anchor layer 13 and the image-receiving layer 14. The image-receiving layer 14 may also be formed so that the amount of antiviral agent added is greater than that in the release layer 12 and the anchor layer 13.

[0055] By using this production method, it is possible to obtain a transfer overlay film that can impart excellent antiviral properties to an object to which the transfer is made and also improve the design of the object to which the transfer is made.

[0056] (Effects of the first embodiment) (1) The transfer overlay film 1 according to this embodiment includes a base sheet 11 and a transfer film 21 formed on one surface of the base sheet 11. The transfer film 21 is formed of multiple layers containing an antiviral agent, and at least one of the multiple layers contains an organic antiviral agent as the antiviral agent. As a result, the transfer overlay film 1 can impart excellent antiviral properties to the surface of the transfer target (object to be transferred), and can also improve the design of the transfer target. (2) Furthermore, in the transfer overlay film 1 according to this embodiment, the multiple layers in the transfer film 21 are all formed to contain a resin and an antiviral agent, and the multiple layers may be composed of a layer containing either an organic antiviral agent or an inorganic antiviral agent as the antiviral agent, and a layer containing an organic antiviral agent as the antiviral agent. As a result, transfer overlay film 1 can impart a superior antiviral effect to the object to be transferred, by virtue of the layer that exhibits a long-lasting antiviral effect due to the inorganic antiviral agent and the layer that exhibits a fast-acting antiviral effect due to the organic antiviral agent.

[0057] (3) In addition, in the transfer overlay film 1 according to this embodiment, the transfer film 21 has, as multiple layers, a release layer 12 in contact with one side of the base sheet 11, an image receiving layer 14 located on the surface side of the transfer film 21, and an anchor layer 13 located between the release layer 12 and the image receiving layer 14. The release layer 12 and the anchor layer 13 contain either an organic antiviral agent or an inorganic antiviral agent as the antiviral agent, and the image receiving layer 14 may contain an organic antiviral agent as the antiviral agent. As a result, the transfer overlay film 1 can exhibit a long-lasting antiviral effect in the release layer 12 and anchor layer 13 arranged on the surface side of the transfer target, and can also exhibit a fast-acting antiviral effect in the image-receiving layer 14. Furthermore, it can reliably suppress turbidity (e.g., cloudiness) and discoloration in the image-receiving layer 14, thereby reliably improving the design of the transfer target.

[0058] (4) In addition, in the transfer overlay film 1 according to this embodiment, the content of the organic antiviral agent in each of the release layer 12, the anchor layer 13, and the image-receiving layer 14 may be within a range of 8 parts by mass or more and 17 parts by mass or less per 100 parts by mass of the resin. This ensures that the transfer overlay film 1 is provided with excellent antiviral properties, and as a result, the transfer overlay film 1 can reliably provide the object with excellent antiviral properties. Furthermore, clouding of the transfer overlay film 1 is further suppressed, and as a result, the transfer overlay film 1 can further improve the design of the object with the transfer. (5) In addition, in the transfer overlay film 1 according to this embodiment, the content of the inorganic antiviral agent in each of the release layer 12 and the anchor layer 13 may be within a range of 0.7 parts by mass or more and 3.0 parts by mass or less per 100 parts by mass of the resin. As a result, transfer overlay film 1 imparts excellent antiviral properties due to the inorganic antiviral agent to the object to be transferred, and also suppresses cloudiness (clouding) and discoloration of the layer containing the inorganic antiviral agent (at least one of release layer 12 and anchor layer 13), thereby improving the design of the object to be transferred.

[0059] (6) In the transfer overlay film 1 according to the present embodiment, either the release layer 12 or the anchor layer 13 may contain an inorganic antiviral agent as the antiviral agent, and the other layer may contain an organic antiviral agent as the antiviral agent. As a result, in the transfer overlay film 1, either an organic antiviral agent or an inorganic antiviral agent can be appropriately selected as the antiviral agent to be used in layers other than the image-receiving layer 14, depending on the application of the object to be transferred (e.g., a card) and the environment in which it will be used. (7) In the transfer overlay film 1 according to this embodiment, both the release layer 12 and the anchor layer 13 may contain an organic antiviral agent as the antiviral agent. This allows the transfer overlay film 1 to impart a more excellent antiviral effect (particularly a fast-acting antiviral effect) to the object to which the transfer is made, and also further improves the design of the object to which the transfer is made.

[0060] (8) In the transfer overlay film 1 according to this embodiment, both the release layer 12 and the anchor layer 13 may contain an inorganic antiviral agent as the antiviral agent. This allows the transfer overlay film 1 to exhibit long-lasting antiviral properties on the surface layer side of the card, and to exhibit more immediate and excellent antiviral properties in the image-receiving layer 14 on the base side of the card. In addition, cloudiness and discoloration of the image-receiving layer 14 can be suppressed, further improving the design of the transfer target (card). (9) In the transfer overlay film 1 according to this embodiment, the content of the antiviral agent may be highest in the image receiving layer 14 among the multiple layers of the transfer film 21. As a result, the transfer overlay film 1 exhibits a superior antiviral effect inside the transfer film 21 transferred to the object to be transferred (e.g., on the card substrate side), and also suppresses cloudiness and discoloration of the entire transfer film 21, thereby more reliably improving the design of the object to be transferred.

[0061] (10) In the transfer overlay film 1 according to this embodiment, the release layer 12 may contain an acrylic resin as the resin. This allows the transfer overlay film 1 to have good compatibility between the material of the release layer 12 and the antiviral agent. (11) In the transfer overlay film 1 according to this embodiment, the thickness of the release layer 12 may be in the range of 0.5 μm to 3.0 μm. This allows the transfer overlay film 1 to have improved durability and processability of the release layer 12. (12) In the transfer overlay film 1 according to this embodiment, the thickness of the anchor layer 13 may be in the range of 0.5 μm to 2.0 μm. This allows the transfer overlay film 1 to enhance the adhesion between the release layer 12 and the image receiving layer 14 .

[0062] (13) In the transfer overlay film 1 according to this embodiment, the thickness of the image-receiving layer 14 may be in the range of 1.0 μm to 7.0 μm. As a result, when the transfer film 21 is transferred onto the surface of a card substrate during the manufacture of the card to be transferred, for example, the image receiving layer 14 can play a role of filling in the irregularities on the surface of the card substrate. (14) In the transfer overlay film 1 according to this embodiment, the transfer film 21 may contain polyethylene wax. This allows the transfer overlay film 1 to improve the scratch resistance and abrasion resistance of the object to which the transfer is made, such as a card.

[0063] 2. Second embodiment (Card 2 configuration) A resin card according to a second embodiment of the present invention will be described with reference to Figs. 2 to 5. Fig. 2 is a cross-sectional view illustrating an example of the configuration of a card 2 according to the second embodiment of the present invention. The card according to this embodiment is a card-type information recording medium made primarily of resin, and is used as, for example, a commuter pass, a train ticket, an admission ticket, a prepaid card, a credit card, a cash card, a point card, various securities, an ID card for identification, etc.

[0064] (Card configuration) As shown in Fig. 2, the card 2 includes a core substrate 16 and a transfer film 21 of the transfer overlay film 1 according to the first embodiment, which is provided on at least one surface of the core substrate 16. The card 2 according to this embodiment has excellent antiviral properties due to the configuration in which the transfer film 21 is laminated on at least one surface of the core substrate 16. In this disclosure and this specification, a card to which antiviral properties have been imparted by using the antiviral transfer film 21 as the outermost layer is referred to as an "antiviral card." Furthermore, as described above, at least one layer (image receiving layer 14) of the multiple layers (peel layer 12, anchor layer 13, and image receiving layer 14) of the transfer film 21 contains an organic antiviral agent. This prevents clouding and discoloration of the transfer film 21, improving the design of the card 2. Note that Fig. 2 shows an example configuration in which the transfer film 21 is formed on both the front and back surfaces (surfaces 16a, 16b) of the core substrate 16.

[0065] As described above, the transfer film 21 laminated on the core substrate 16 of the card 2 has multiple layers (the release layer 12, the anchor layer 13, and the image-receiving layer 14), and all of the multiple layers contain an antiviral agent. Therefore, even if scratches due to rubbing occur on the surface of the card 2 and the outermost surface of the card 2 (for example, the release layer 12 and the anchor layer 13 of the transfer film 21) is scraped off, the antiviral effect can be maintained.

[0066] The card 2 also includes a picture printing layer 15, on which a predetermined image is formed (printed), and which is provided between at least one surface (in this example, surface 16a) of the core substrate 16 and the transfer film 21. As shown in FIG. 2, the picture printing layer 15 is formed on the surface of the transfer film 21 opposite the anchor layer 13. As will be described in detail later, the picture printing layer 15 is formed on the image receiving layer 14 of the transfer film 21 before the transfer film 21 is transferred to the core substrate 16. In other words, a picture printing overlay film 210 composed of the transfer film 21 and the picture printing layer 15 is laminated on the surface 16a of the core substrate 16. Note that the card 2 may include picture printing layers 15 on both the front and back sides (surfaces 16a, 16b) of the core substrate 16, and the picture printing overlay film 210 may be laminated on both the front and back sides of the core substrate 16.

[0067] [Picture printing layer] As shown in Figure 2, a picture printing layer 15 transferred to an image receiving layer 14 of a transfer film 21 is laminated on the core substrate 16 of the card 2. Specifically, the picture printing layer 15 is laminated on the upper surface (surface 16a) of the core substrate 16 in Figure 2, and is disposed between the upper surface of the core substrate 16 and the transfer film 21. The picture printing layer 15 is formed on the image receiving layer 14 of the transfer film 21 in order to impart desired information (image, text information) to the card surface according to the function of the card 2. The type of image or text information formed as the picture printing layer 15 is not particularly limited.

[0068] The picture print layer 15 is formed on the image receiving layer 14 of the transfer film 21 by thermally melting color panels (ink layers) of a transfer ribbon (a transfer ribbon 72 shown in FIG. 5, which will be described later). The transfer ribbon forming the picture print layer 15 uses color panels (ink layers) of C (cyan), M (magenta), Y (yellow), and Bk (black) as basic configuration examples to form various colors. Various known pigments can be used as pigments for these color panels, including carbon black, azo-based, phthalocyanine-based, quinacridone-based, thioindigo-based, anthraquinone-based, and isoindolinone-based pigments. These pigments can be used alone or in combination of two or more types. Known dyes can also be added to adjust the hue.

[0069] In the transfer ribbon, the binder resin for each ink layer containing the above-mentioned coloring material may be, for example, butyral resin, polyamide resin, polyethyleneimine resin, sulfonamide resin, polyester polyol resin, petroleum-based resin, epoxy resin, styrene resin, styrene and its derivatives, methacrylic acid esters such as methyl methacrylate, ethyl methacrylate, hydroxymethacrylate, and hydroxyethyl methacrylate, acrylic acid esters such as methacrylic acid, methyl acrylate, ethyl acrylate, and butyl acrylate, and homopolymers or copolymers of vinyl monomers such as vinyl chloride and vinyl acetate. These resins may be used alone or in combination of two or more.

[0070] In addition to the above-mentioned color materials (pigments and dyes) and binder resins, additives such as release agents, softeners, and surfactants can be added to each color ink layer of the transfer ribbon as needed.

[0071] The film thickness of the pattern printing layer 15 is designed according to the film thickness of the transfer ribbon to be transferred to the image receiving layer 14, but is preferably in the range of 0.3 μm to 5.0 μm. If the film thickness of the pattern printing layer 15 is less than 0.3 μm, the film thickness may be too thin, making it difficult to recognize the pattern. If the film thickness of the pattern printing layer 15 exceeds 5.0 μm, the film thickness may be too thick, making it difficult to transfer ink from the transfer ribbon, and the sharpness of the pattern (image) may be lost.

[0072] 2, the picture printing layer 15 is formed on the transfer film 21 on the upper surface (surface 16a) of the core substrate 16 and laminated on the upper surface of the core substrate 16, but the present disclosure is not limited to this. In the card 2, the picture printing layer 15 may be laminated on both the front and back surfaces (surfaces 16a, 16b) of the core substrate 16. In other words, the picture printing layer 15 may be formed on the transfer film 21 on the lower surface (surface 16b) of the core substrate 16. This allows desired images and text information to be formed on both the front and back surfaces of the core substrate 16, and desired information to be displayed on the front and back surfaces of the card 2.

[0073] An example of the picture printed layer 15 will now be described with reference to Fig. 3. Fig. 3 is a plan view for explaining an example of the configuration of the card 2. In this example, the card 2 is an ID card. For this reason, a personal identification image 15a for personal identification is formed on the picture printing layer 15. In this example, the personal identification image 15a is a facial photograph. In addition to the personal identification image 15a, identification character information 15b for personal identification, general character information 15c indicating the card type, etc. are also formed on the picture printing layer 15. In this example, the identification character information 15b includes, for example, the individual's name, information about the organization to which the individual belongs, the card's expiration date, etc. In this way, in this example, card 2 can serve as an identification card by having personal identification image 15a, identification character information 15b, and general character information 15c as picture printing layer 15. However, the present disclosure is not limited to this, and various images and character information can be formed on image receiving layer 14 as picture printing layer 15, and by laminating picture printing overlay film 210 having image receiving layer 14 onto core substrate 16, desired information (image, character information) according to the function of card 2 can be imparted to the card surface.

[0074] Although not shown in Fig. 3 for ease of understanding, a transfer film 21 is laminated as an upper layer of the picture printing layer 15 as shown in Fig. 2. As described above, the image receiving layer 14 on which the picture printing layer 15 is formed in the transfer film 21 contains an organic antiviral agent as an antiviral agent. This suppresses clouding and discoloration of the image receiving layer 14 and, in turn, the transfer film 21, improving the visibility of the picture printing layer 15. This improves the design of the card 2.

[0075] Furthermore, in the past, when individual information needed to be added to each card, such as an ID card, cards were produced by laminating an exterior film using die-cutting or other methods in a factory, and then images or text information was formed on the outermost layer of the film as an additional component. Therefore, even if the exterior film contained an antiviral agent, the image or text information was printed on top of it, preventing the antiviral effect from being fully realized. In contrast, in the card 2 according to this embodiment, a picture print layer 15 is formed on the image-receiving layer 14 of the transfer film 21. Therefore, the transfer film 21 containing the antiviral agent is disposed as an upper layer of the picture print layer 15. This allows the card 2 to exhibit excellent antiviral effects even when individual information is added to each card.

[0076] Here, an outline of the transfer of the transfer film 21 onto the core substrate 16 will be described. Details of the method for manufacturing the card 2 will be described later. FIG. 4 is a conceptual diagram showing an example of a method for laminating an antiviral card. The card 2 is formed by transferring the transfer film 21 to the core substrate 16 by lamination. Specifically, the transfer overlay film 1 according to the first embodiment is placed on the surface of the core substrate 16, and the transfer film 21 is adhered to the surface of the core substrate 16 by lamination. The base sheet 11 is then removed (peeled off), and the transfer film 21 is transferred to the core substrate 16.

[0077] In this example, the transfer of the transfer film 21 onto both the front and back surfaces (surfaces 16a and 16b) of the core substrate 16 will be described. 4, the surface 16a of the core substrate 16 and the transfer overlay film 1 are placed opposite each other, and the image receiving layer 14 located on the surface of the transfer film 21 is placed on the surface 16a side, and then lamination is performed to transfer the transfer film 21 to the surface 16a. In addition, the transfer film 21 to be transferred to the surface 16a has a pattern printing layer 15 formed on the image receiving layer 14. That is, a picture-printed overlay film 210 composed of a transfer film 21 and a picture-printed layer 15 is laminated on the surface 16a. 4, the transfer overlay film 1 and the surface 16b of the core substrate 16 are placed opposite each other, and the image-receiving layer 14 located on the surface of the transfer film 21 is placed on the surface 16b side. In this state, lamination is performed to transfer the transfer film 21 to the surface 16b. In this way, the transfer film 21 can be transferred to both the front and back surfaces (surfaces 16a and 16b) of the core substrate 16.

[0078] As mentioned above, the card 2 only needs to have the transfer film 21 transferred to at least one surface of the core substrate 16. As shown in Figure 4, the transfer film 21 may be transferred to both the front and back surfaces (surfaces 16a and 16b) of the core substrate 16, or the transfer film 21 may be transferred only to surface 16a, or the transfer film 21 may be transferred only to surface 16b. Furthermore, if the card 2 does not need to have individual information added to each card, such as an ID card, the transfer film 21 does not need to have the picture print layer 15 provided.

[0079] (Core substrate 16) The core substrate 16 of the card 2 can be made of a thermoplastic resin, similar to the substrate sheet 11 in the transfer overlay film 1, for example. The thermoplastic resin used for the core substrate 16 is not particularly limited, and examples thereof include polyolefin resins such as polyethylene, polypropylene, polymethylpentene, polybutene, ethylene-propylene copolymer, ethylene-α-olefin copolymer, and propylene-α-olefin copolymer; polyolefin-based resins such as olefin-based copolymer resins such as ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, ethylene-(meth)acrylic acid (ester) copolymer, and ethylene-unsaturated carboxylic acid copolymer metal neutralized product (ionomer); polyethylene terephthalate, glycol-modified polyethylene terephthalate, polybutylene terephthalate, polytetramethylene terephthalate, polyethylene naphthalate, polyethylene terephthalate-isophthalate copolymer, and 1,4-cyclohexanedimethanol copolymerized polyethylene terephthalate; phthalate, polyarylate, polycarbonate and other polyester-based resins; poly(meth)acrylonitrile, polymethyl(meth)acrylate, polyethyl(meth)acrylate, polybutyl(meth)acrylate, polyacrylamide and other acrylic resins; 6-nylon, 6,6-nylon, 6,10-nylon and other polyamide-based resins; polystyrene, AS resin, ABS resin and other styrene-based resins; polyvinyl chloride, polyvinyl acetate, polyvinyl alcohol, polyvinyl acetal, polyvinyl butyral, vinyl chloride-vinyl acetate copolymer and other vinyl resins; polyvinyl fluoride, polyvinylidene fluoride, polytetrafluoroethylene, ethylene-tetrafluoroethylene copolymer, ethylene-perfluoroalkyl vinyl ether copolymer and other fluorine-based resins; and mixtures, copolymers, composites, laminates and the like of two or more of these can be used.

[0080] In this embodiment, polyethylene terephthalate (PET) or polyvinyl chloride (PVC), which are thermoplastic resins, can be suitably used as the core substrate 16 for a general card.

[0081] The thickness of the card 2, including the core substrate 16, the picture printing layer 15, and the transfer film 21, is preferably within the range of card thickness (680 μm to 840 μm) specified in the JIS standard (JISX6301:2005). Therefore, taking into consideration the thickness of the transfer film 21 excluding the thickness of the base sheet 11 in the transfer overlay film 1, the thicknesses of the core substrate 16 and the picture printing layer 15 can be appropriately designed so that the thickness of the card 2 falls within this range. The thickness of the card 2 may be configured to correspond to a thin-film card of 0.15 mm or more and 0.6 mm or less, which is outside the scope of the JIS standard.

[0082] (Card 2 manufacturing method) The card 2 according to this embodiment has the above-mentioned configuration, and the manufacturing method thereof includes the following first and second steps. A method for manufacturing the card 2 will be described below with reference to Fig. 5. Fig. 5 is a diagram for explaining an example of a method for manufacturing the card 2 using a printing device 7.

[0083] (1) First step The first step is a step of providing a picture print layer 15 on which a predetermined image is formed on the image receiving layer 14 of the transfer film 21. That is, in the first step, the picture print layer 15 is provided on the transfer film 21 to form a picture print overlay film 210. That is, in the first step, the picture print layer 15 on which a predetermined image is formed is provided on the image receiving layer 14 of the transfer film 21. 5, in the first step, a transfer ribbon 72, which is a thermal transfer ribbon, is thermally melted by a thermal head 73 in the printing device 7 to transfer the image print layer 15 to a transfer overlay ribbon 71. The transfer overlay ribbon 71 is a roll of transfer overlay film 1 wound around a cylindrical tubular unwinding roll 711.

[0084] Specifically, in the first step, the transfer ribbon 72 is thermally melted by the thermal head 73, and the ink layers of each color are transferred to the image receiving layer 14 of the transfer overlay ribbon 71 (transfer overlay film 1). Although not shown in FIG. 5, the image receiving layer 14 is disposed on the thermal head 73 side of the transfer overlay ribbon 71 unwound from the unwinding roll 711. As a result, predetermined images and character information are transferred onto the image receiving layer 14, forming the picture printing layer 15. For example, when the transfer overlay ribbon 71 is transferred to an ID card, a personal identification image 15a (see FIG. 3), identification character information 15b, etc. are printed on the image receiving layer 14, forming the picture printing layer 15. The transfer ribbon 72 used to form the picture printing layer 15 in the first step is passed from the unwinding roll 721 through the thermal head 73 and then wound onto the take-up roll 722 after printing.

[0085] (2) Second process The second step is a step of transferring the transfer film 21 of the transfer overlay ribbon 71 (transfer overlay film 1) onto the core substrate 16. In the second step, as described above, one surface of the core substrate 16 and the transfer film 21 of the transfer overlay ribbon (transfer overlay film 1) are arranged opposite each other, and lamination is performed with the image receiving layer 14, which is the outermost layer of the multiple layers of the transfer film 21, positioned on one surface of the core substrate 16, to transfer the transfer film 21 onto that one surface of the core substrate 16.

[0086] 5, in the second step, the transfer film 21 of the transfer overlay ribbon 71 (transfer overlay film 1) is transferred to one surface (e.g., surface 16a) of the core substrate 16, for example, by laminating press using a laminating roller 75, to produce a card in which the transfer film 21 covers at least one surface of the core substrate 16. When the transfer film 21 is to be transferred to both the front and back surfaces of the core substrate 16, the transfer of the transfer film 21 by the laminating roller 75 may be performed on both the front and back surfaces of the core substrate 16.

[0087] Although not shown in Figure 5, in the transfer overlay ribbon 71 unwound from the unwinding roll 711, the base sheet 11 is arranged on the laminating roller 75 side, and the image receiving layer 14 of the transfer film 21 is arranged on the core substrate 16 side. The laminating roller 75 is, for example, a heat roller, and heats and presses the transfer overlay ribbon 71 from the base sheet 11 side by the laminating roller 75, and the transfer film 21 is pressed onto one surface of the core base material 16, thereby laminating the one surface of the core base material 16 and the transfer film 21. As a result, the base sheet 11 is peeled off, and the transfer film 21 is transferred onto one surface of the core base material 16.

[0088] In this example, the transfer film 21 provided with the picture printing layer 15 is transferred onto one surface of the core substrate 16. This provides a predetermined image and text information to the card 2. For example, if a personal identification image 15a (see FIG. 3) or identification text information 15b is printed on the image receiving layer 14 as the picture printing layer 15, the card 2 is endowed with a personal identification function and can be used as an ID card. In the first and second steps, the transfer overlay ribbon 71 is wound from the unwinding roll 711 to the take-up roll 712 via the platen roller 74 and laminating roller 75. After passing through the laminating roller 75, i.e., after the transfer of the transfer film 21, the transfer overlay ribbon 71 consists of only the base sheet 11.

[0089] This manufacturing method makes it possible to obtain a card 2 in which a transfer film 21 having multiple layers containing an antiviral agent is laminated on at least one surface of a core substrate 16, as shown in Fig. 2. Furthermore, as described above, at least one layer of the multiple layers of the transfer film 21 contains an organic antiviral agent. This makes it possible to obtain an antiviral card using an antiviral transfer overlay film 1 (transfer overlay ribbon 71) that can impart excellent antiviral properties to the object to be transferred and improve the design of the object to be transferred.

[0090] Furthermore, the manufacturing method of the card 2 in the present disclosure is not limited to this, and the picture printing layer may be printed directly on the core substrate by known printing methods such as gravure printing, offset printing, silk screen printing, inkjet printing, and flexographic printing. Furthermore, the lamination process in the second step is not limited to lamination press using heat and pressure, but may be cold lamination, in which case the laminating roller 75 may be a pressure roller instead of a heat roller.

[0091] (Effects of the second embodiment) (15) The card 2 according to this embodiment includes a core substrate 16 and a transfer film 21 of the transfer overlay film 1 laminated on at least one surface of the core substrate 16 . As a result, the transfer film 21 of the transfer overlay film 1 imparts excellent antiviral properties to the surface of the card 2, and also improves the design. (16) The card 2 according to this embodiment may also include a picture print layer 15 provided between at least one surface of the core substrate 16 and the transfer film 21, on which a predetermined image is formed. This allows the card 2 to display desired information on both the front and back faces.

[0092] 3. Third embodiment (Card 3 configuration) A card according to a third embodiment of the present disclosure will be described with reference to Figs. 6 to 10. Fig. 6 is a cross-sectional view showing a schematic configuration of a card according to a third embodiment of the present disclosure. As shown in Fig. 6, card 3 differs from card 2 according to the second embodiment in that transfer film 21 laminated on one surface of core substrate 16 covers at least a portion of the side surface of core substrate 16 in addition to covering one surface of core substrate 16. The following describes card 3. Note that the same components as those in card 2 are given the same reference numerals, and descriptions thereof will be omitted where appropriate.

[0093] As shown in Figure 6, in the card 3, at least one surface of the core substrate 16 and at least a portion of the side surface of the core substrate are continuously covered with the transfer film 21. Here, "continuously covered" means that the transfer film 21 covers the core substrate without any gaps. The card 3 according to this embodiment has a configuration in which the transfer film 21 laminated on at least one surface of the core substrate 16 continuously covers the one surface and a portion of the side surface, thereby making it possible to suppress bacterial growth and viral activation on the side surface. This gives the card 3 even better antiviral properties.

[0094] Here, Figure 6 shows an example configuration in which transfer films 21 are formed on both the front and back surfaces (surfaces 16a, 16b) of the core substrate 16, and each transfer film 21 continuously covers both the front and back surfaces and at least a portion of the side surfaces of the core substrate 16. Specifically, in the card 3, the transfer film 21 laminated on the surface 16a side of the core substrate 16 continuously (without gaps) covers a portion of the side surface 16c of the core substrate 16 (the upper half of the height direction) and the entire surface 16a. Furthermore, for example, the transfer film 21 laminated on the surface 16b side of the core substrate 16 continuously (without gaps) covers a portion of the side surface 16c (the lower half region in the height direction) of the core substrate 16 and the entire surface 16b of the core substrate 16. As a result, in this example, the entire outer surface of the core substrate 16 (surfaces 16a, 16b, side surface 16c) is continuously covered with the transfer film 21. This allows the card 3 to have extremely excellent antiviral properties.

[0095] Here, an outline of the transfer of the transfer film 21 onto the core substrate 16 in this embodiment will be described. Details of the method for manufacturing the card 3 will be described later. Fig. 7 is a conceptual diagram showing an example of a lamination method for an antiviral card. In this embodiment, as shown in Fig. 7, the surface area of ​​the transfer film 21 is configured to be larger than the area of ​​the surfaces (16a, 16b) of the core substrate 16. This allows one transfer film 21 to continuously cover one surface of the core substrate 16 as well as at least a portion of the side surface.

[0096] Specifically, the surface area of ​​the transfer film 21 laminated on the surface 16a side of the core substrate 16 is formed to be the sum of the area of ​​the surface 16a and the area of ​​the upper half of the height direction of the side surface 16c. In this way, by performing lamination processing and transferring the transfer film 21 to the surface 16a with the image receiving layer 14 located on the surface layer of the transfer film 21 positioned on the surface 16a side, it is possible to cover the surface 16a and the upper half of the height direction of the side surface 16c. Similarly, the surface area of ​​the transfer film 21 laminated on the surface 16b side of the core substrate 16 is set to the sum of the area of ​​the surface 16b and the area of ​​the lower half of the height direction of the side surface 16c. In this way, lamination is performed with the image receiving layer 14 located on the surface layer of the transfer film 21 positioned on the surface 16b side, and the transfer film 21 is transferred to the surface 16b, thereby covering the surface 16b and the lower half of the height direction of the side surface 16c.

[0097] (Card 3 manufacturing method) The card 3 according to this embodiment has the above-described configuration, and the manufacturing method thereof includes the following third and fourth steps. A method for manufacturing the card 3 will be described below with reference to Fig. 8. Fig. 8 is a diagram for explaining an example of a method for manufacturing the card 3 using a printing device 8.

[0098] (1) The third step The third step is a step of providing a picture print layer 15 on which a predetermined image is formed on the image receiving layer 14 of the transfer film 21, and is the same as the first step in the second embodiment. As shown in Figure 8, in the third step, the transfer ribbon 82 is thermally melted by a thermal head 83 in the printing device 8, transferring the image printing layer 15 to the transfer overlay ribbon 81. The transfer overlay ribbon 81 is a roll of transfer overlay film 1 wound around a cylindrical tubular unwinding roll 811. In other words, the transfer overlay ribbon 81 has the same configuration as the transfer overlay ribbon 71 in the second embodiment.

[0099] Specifically, in the third step, each ink layer of transfer ribbon 82, which is a thermal transfer ribbon, is transferred (transferred) to image receiving layer 14 of transfer overlay ribbon 81 (transfer overlay film 1) by pulsed heat from thermal head 83. Although not shown in FIG. 8, in transfer overlay ribbon 81 unwound from unwinding roll 811, image receiving layer 14 is disposed on the thermal head 83 side. As a result, as in the first step described above, predetermined images and character information are transferred onto image receiving layer 14, and picture printing layer 15 is formed. Note that transfer ribbon 82 used to form picture printing layer 15 in the third step is taken up from unwinding roll 821, via thermal head 83, onto take-up roll 822.

[0100] (2) The fourth step The fourth step is a step of transferring the transfer film 21 of the transfer overlay ribbon 81 (transfer overlay film 1) to the core substrate 16, similar to the second step in the second embodiment. In the fourth step, as described above, one surface of the core substrate 16 and the transfer film 21 of the transfer overlay ribbon (transfer overlay film 1) are arranged opposite each other, and lamination is performed with the image receiving layer 14, which is the outermost layer of the multiple layers of the transfer film 21, positioned on one surface of the core substrate 16, to transfer the transfer film 21 to the one surface of the core substrate 16. In this embodiment, in the fourth step, the transfer film 21 continuously covers one surface of the core substrate 16 and at least a portion of the side surface of the core substrate 16 during lamination.

[0101] 8, in the fourth step, the transfer film 21 of the transfer overlay ribbon 71 (transfer overlay film 1) is transferred to one surface (for example, surface 16a) of the core substrate 16 by lamination pressing using a recessed laminating roller 85. As a result, the transfer film 21 having a surface area larger than that of one surface of the core substrate 16 is transferred to the core substrate 16. In this example, a picture-printed overlay film 210 having a picture-printed layer 15 laminated to a transfer film 21 is described as being on the core substrate 16, but a transfer film 21 not having a picture-printed layer 15 can also be laminated in the same manner.

[0102] Here, the configuration of the recessed laminating roller 85 will be described with reference to FIGS. Fig. 9 is a front perspective view showing an example of the configuration of the indented laminating roller 85. Fig. 10 is a diagram showing an example of the mechanism of the indented laminating roller 85. 9, the dimpled laminating roller 85 is a laminating roller used for laminating when manufacturing antiviral cards, and has recesses 88. For example, the dimpled laminating roller 85 is a heat roller that laminates the picture-printed overlay film 210 onto the core substrate 16 by applying heat and pressure. Specifically, the recessed laminating roller 85 has two recesses 88a and 88b. The recesses 88a and 88b have the same configuration, so the recess 88a will be described below as an example.

[0103] Recess 88a is composed of an inner bottom surface 881 and inner wall surfaces 882. Inner bottom surface 881 of recess 88a has a rectangular shape similar to that of core substrate 16. The surface area of ​​inner bottom surface 881 is equal to the area of ​​the surface (surfaces 16a, 16b) of core substrate 16 covered with picture-printed overlay film 210. In other words, the surface area of ​​inner bottom surface 881 is larger than the area of ​​the surface of core substrate 16 by at least the amount of picture-printed overlay film 210. The height of the inner wall surface 882 of the recess 88a is at least half the height of the side surface (side surface 16c) of the core substrate 16 covered with the picture-printed overlay film 210. In other words, the surface area of ​​the inner wall surface 882 is larger than the area of ​​half the region in the height direction of the side surface 16c of the core substrate 16. By providing the recessed lamination roller 85 with the recessed portions 88 having such a configuration, it is possible to transfer onto the core substrate 16 a pattern-printed overlay film 210 having a surface area larger than one surface of the core substrate 16 (specifically, the combined area of ​​the surface 16a or the surface 16b and the area of ​​half the heightwise region of the side surface 16c).

[0104] 10 , in the fourth step of this embodiment, a picture-printed overlay film 210, which is formed by providing a picture-printed layer 15 on the transfer film 21 of the transfer overlay ribbon 81, is laminated onto the core substrate 16 using a recessed laminating roller 85. At this time, as shown in FIG. 10 , the inner wall surface 882 of the recessed portion 88a first laminates the picture-printed overlay film 210 onto the side surface 16c on the leading side in the moving direction 102 of the core substrate 16. Furthermore, as the recessed laminating roller 85 rotates in the direction indicated by arrow 9, the inner bottom surface 881 of the recessed portion 88a moves over one surface (e.g., surface 16a) of the core substrate while laminating the picture-printed overlay film 210, and finally the picture-printed overlay film 210 is laminated onto the side surface 16c on the trailing side in the moving direction 102.

[0105] As a result, as shown in the lower part of Figure 10, a pattern-printed overlay film 210 having a size equal to the area of ​​one surface (e.g., surface 16a) of the core substrate 16 and half the area of ​​the height direction of the side surface 16c (one of the areas obtained by dividing the side surface 16c into two equal parts in the height direction) is laminated onto one surface side of the core substrate 16.

[0106] Returning to Figure 8, as described above, the core substrate 16, one surface of which has been laminated with the pattern-printed overlay film 210 by the recessed laminating roller 85, is then turned over by the swing roller 86, and passed through the moving belt 87, where the other surface (e.g., surface 16b) and the remaining half of the heightwise area of ​​the side surface 16c (the remaining area of ​​the area obtained by dividing the side surface 16c into two equal parts in the heightwise direction) are again laminated.

[0107] As described above, in the depression laminating roller 85 according to this embodiment, the surface area of ​​the inner surface of the recesses 88 (88a, 88b) is larger than the area of ​​the surface (surfaces 16a, 16b) of the core substrate 16 of the card 3. As a result, by using the depression laminating roller 85, it is possible to continuously cover at least one surface of the core substrate 16 and at least a part of the side surface 16c. Furthermore, the inner wall surface 882 of the recessed portion 88 (88a, 88b) has a height that is at least half the height of the side surface 16c of the core substrate 16 of the card 3. As a result, by using the laminating roller 85 with recesses, the entire surface (surface 16a or surface 16b) of the core substrate 16 can be continuously covered with the picture-printed overlay film 210 (transfer film 21) from at least halfway up the side surface 16c of the core substrate 16.

[0108] In the third and fourth steps, the transfer overlay ribbon 81 is wound from the unwinding roll 811 to the platen roller 84, the laminating roller 85, and then onto the take-up roll 812. After passing through the laminating roller 85, i.e., after the transfer of the picture-printed overlay film 210, the transfer overlay ribbon 81 consists of only the base sheet 11.

[0109] By this manufacturing method, a card 3 can be obtained in which at least one surface (surface 16a or surface 16b) of the core substrate 16 and at least a portion of the side surface 16c of the core substrate 16 are continuously covered with a transfer film 21 (or a picture-printed overlay film 210), as shown in Figure 6. This makes it possible to obtain a card with even better antiviral properties by using an antiviral transfer overlay film 1 (transfer overlay ribbon 81) that can impart excellent antiviral properties to the object to be transferred and improve the design of the object to be transferred.

[0110] (Effects of the third embodiment) (17) In the card 3 according to this embodiment, at least one surface (surfaces 16a and 16b) of the core substrate 16 and at least a part of the side surface 16c of the core substrate 16 may be continuously covered with the transfer film . This provides the card 3, which is the object onto which the transfer overlay film 1 is to be transferred, with even better antiviral properties. (18) The laminating roller 85 of this embodiment is a laminating roller used for laminating in the manufacturing method of the card 3, and has a recess 88 on its surface, and the surface area of ​​the inner bottom surface 881 of the recess 88 is larger than the area of ​​one surface (surfaces 16a, 16b) of the core substrate 16 of the card 3. As a result, by using the laminating roller 85 with the depressions, at least one surface of the core substrate 16 of the card 3 and at least a part of the side surface 16c can be covered continuously. (19) In the laminating roller 85 according to this embodiment, the inner wall surface 882 of the recess 88 has a height that is at least half the height of the side surface 16c of the core substrate 16 of the card 3. As a result, by using the recessed lamination roller 85, the entire surface (surface 16a or surface 16b) of the core substrate 16 of the card 3 can be continuously covered with the transfer film 21, from at least half of the side 16c of the core substrate 16.

[0111] <Example> The present invention will be explained in more detail below with reference to examples, but the present invention is not limited to these examples.

[0112] Example 1 A release layer was applied to a 16 μm thick substrate sheet made of transparent polyethylene terephthalate (PET) by gravure coating to a dry film thickness of 1.5 μm. An anchor layer was then applied to that to a dry film thickness of 1.0 μm, and an image-receiving layer was then applied to that to a dry film thickness of 5.0 μm. This provided a transfer film on one side of the substrate sheet. Each layer of the transfer film (release layer, anchor layer, and image-receiving layer) contained 8.5 parts by mass of an organic antiviral agent per 100 parts by mass of resin. The organic antiviral agent used was "Wiltaker VM" manufactured by Sekisui Material Solutions Co., Ltd. This resulted in a transfer overlay film with antiviral properties.

[0113] The above-mentioned transfer overlay film was cut into a ribbon with a width of 60 mm and placed as an intermediate transfer foil (overlay) in a printing device. A facial photograph or the like was printed (printed) on the image-receiving layer of this transfer overlay film with a thermal head using a transfer ribbon made of a pigment panel to form a picture-printed layer, thereby forming a picture-printed overlay film. The heat roller of the printing device was used to transfer the picture-printed overlay film onto both the front and back of a core substrate made of polyvinyl chloride. The lamination conditions were a heating temperature of 160°C and a conveying speed of 30 mm / sec, and the picture-printed overlay film was thermally transferred onto each side of the core substrate. This resulted in the production of a card with the picture-printed overlay film laminated on both the front and back.

[0114] Example 2 Each layer of the transfer film (release layer, anchor layer, image-receiving layer) contained 8.0 parts by mass of an organic antiviral agent per 100 parts by mass of resin. Other than that, the same procedure as in Example 1 was carried out to obtain a picture-printed overlay film and a card according to this example. Example 3 Each layer of the transfer film (release layer, anchor layer, image-receiving layer) contained 17.0 parts by mass of an organic antiviral agent per 100 parts by mass of resin. Other than that, the same procedure as in Example 1 was carried out to obtain a picture-printed overlay film and a card according to this example.

[0115] Comparative Example 1 No antiviral agent was added to any of the layers of the transfer film (release layer, anchor layer, image-receiving layer). Other than that, the same procedure as in Example 1 was carried out to obtain a picture-printed overlay film and card according to this comparative example. Comparative Example 2 Each layer of the transfer film (release layer, anchor layer, image-receiving layer) contained 1.0 part by mass of an inorganic antiviral agent per 100 parts by mass of resin. Other than that, the same procedure as in Example 1 was carried out to obtain a picture-printed overlay film and card according to this comparative example.

[0116] <Evaluation> [Antiviral performance] Antiviral tests were conducted on the cards of each Example and Comparative Example in accordance with ISO 21702. A 50 mm square sample piece was placed in a sterile Petri dish, and 0.4 mL of virus solution was inoculated onto the sample. The virus solution used here was a virus solution containing feline calicivirus and influenza virus. The sample was then covered with a 40 mm square polyethylene film. After the Petri dish was covered with a lid, the sample and virus were inoculated under conditions of a temperature of 25°C and humidity of 90% or higher. The sample was allowed to stand for a specified time (24 hours). After standing, the virus on the test piece was washed and recovered, and the virus infectivity was measured. The antiviral activity value was calculated using the following formula: R1=Ut1-At1 R1: Antiviral activity Ut1: Virus infectivity (PFU / cm) after leaving the unprocessed product for 24 hours 2 ) At1: Viral infectivity (PFU / cm) of antiviral processed products after leaving them for 24 hours 2 ) the average of the base 10 logarithms Among the results of the antiviral performance test, those with an antiviral activity value (R1) of 2.0 or higher against both feline calicivirus and influenza virus are recognized as having antiviral performance. In addition, the following antibacterial performance test was conducted on cards that were recognized as having antiviral performance. Here, "antiviral performance" refers to the ability to inactivate viruses.

[0117] [Antibacterial performance] An antibacterial test was carried out in accordance with JIS Z 2801 for the cards according to the examples which had antiviral activity values ​​(R1) of 2.0 or more against both feline calicivirus and influenza virus. A 50mm square sample piece was placed in a sterile dish and 0.4mL of bacterial solution was inoculated onto the sample. The bacterial solution used here was a bacterial solution containing Staphylococcus aureus and Escherichia coli. Then, a 40mm square polyethylene film was placed over the sample. After the dish was covered with a lid, it was cultured under conditions of a temperature of 35°C and a humidity of 90% or more. After leaving it to stand, the test bacteria on the sample piece were washed out and collected, and then a 1cm 2 The number of viable bacteria per unit area was measured. The antibacterial activity value was calculated using the following formula. R2=Ut2-At2 R2: Antibacterial activity value Ut2: 1cm of unprocessed product after 24 hours 2 Average logarithm of viable bacteria count per At2: 1cm of antibacterial treated specimen after 24 hours 2 Average logarithm of viable bacteria count per In the antibacterial performance test results, if the antibacterial activity value (R2) against both Staphylococcus aureus and Escherichia coli is 2.0 or higher, it is recognized as having antibacterial properties. "Antibacterial performance" here refers to the ability to prevent the growth of bacteria.

[0118] [Design] After the production of each card in each Example and Comparative Example, an appearance inspection was conducted to visually check the appearance of the card, and a sensory evaluation was conducted on a three-level scale of "good", "good", and "bad" according to the following criteria. <Evaluation criteria> ○: No cloudiness or voids (poor formation of the image print layer (voids in the print)) are observed on the card exterior. △: The card is slightly cloudy and has gaps. ×: Cloudiness or voids are observed on the card exterior.

[0119] The above evaluation results are shown in Table 1. In judging the evaluation results, "〇" is considered pass and "×" is considered fail. In addition, as an overall judgment, if all of the above evaluation results are "△" or above, it is considered "〇" (pass), and if even one of the above evaluation results is "×" or "-", it is considered "×" (fail). In Table 1, a "-" in the "Transfer Film" column indicates that no antiviral agent was added to each layer of the transfer film. In Table 1, a "-" in the evaluation column indicates that the antiviral activity value (R1) was less than 2.0 and no antibacterial test was performed.

[0120] [Table 1]

[0121] As shown in Table 1, the cards of Examples 1 to 3 all had an antiviral activity value (R1) of 2 or more (pass) in the antiviral evaluation. Furthermore, the cards of Examples 1 to 3 all had an antibacterial activity value (R2) of 2 or more (pass) in the antibacterial evaluation. In other words, it was found that the pattern-printed overlay films (transfer overlay films) of Examples 1 to 3 can impart excellent antiviral properties (antiviral and antibacterial properties) to the cards that are the transfer targets. Furthermore, the design evaluation of all cards to which the transfer foils of Examples 1 to 3 were transferred was "Fair" or better (passed). In other words, it was found that the pattern-printed overlay films (transfer overlay films) of Examples 1 to 3 can improve the design of the cards to which the transfer foils were transferred.

[0122] On the other hand, the cards of Comparative Examples 1 and 2 had antiviral activity values ​​(R1) that could not be determined in the antiviral performance test ("-" in Table 1), and all of the antiviral evaluation results were unsatisfactory. Furthermore, the cards of Comparative Examples 1 and 2 also had antibacterial activity values ​​(R2) that could not be determined in the antibacterial performance test ("-" in Table 1), and all of the antibacterial evaluation results were unsatisfactory. In other words, it was found that the pattern-printed overlay films (transfer overlay films) of Comparative Examples 1 and 2 were unable to impart sufficient antiviral properties to the cards that were the transfer targets. Furthermore, in the card of Comparative Example 2, the addition of an inorganic antiviral agent to all layers of the transfer film (peel layer, anchor layer, and image-receiving layer) deteriorated the compatibility between the image-receiving layer and the transfer ribbon of the printing device, resulting in poor formation of the picture print layer (missing print, etc.) due to the occurrence of pinholes, etc. For this reason, the card of Comparative Example 2 received a design evaluation of "X," a lower evaluation than Examples 1 to 3. In other words, it was found that the addition of an inorganic antiviral agent to all layers of the transfer film (peel layer, anchor layer, and image-receiving layer) reduced the design of the transfer target (card).

[0123] In other words, it was found that a transfer overlay film in which at least one of multiple layers contains an organic antiviral agent as an antiviral agent can impart excellent antiviral properties to an object to which the transfer is made and can also improve the design of the object to which the transfer is made. Furthermore, it is presumed that the difference in the design evaluation between Examples 1 and 2 compared to Example 3 is due to the influence of the content of the antiviral agent (organic antiviral agent) in each layer of the transfer film of the transfer overlay film. That is, in the transfer overlay films of Examples 1 and 2, the content of the antiviral agent in each layer of the transfer film was in the range of 8 parts by mass to 12 parts by mass, which is presumed to be advantageous in terms of design evaluation.

[0124] The transfer overlay film and antiviral card of the present disclosure are not limited to the above-described embodiments and examples, and various modifications are possible within the scope that does not impair the features of the invention. [Explanation of symbols]

[0125] 1 Transfer Overlay Film 2, 3 cards 7, 8 Printing device 11 Base sheet 12 Peeling layer 13 Anchor Layer 14 Image receiving layer 15 Picture printing layer 16 Core substrate 21 Transfer film 71, 81 Transfer overlay ribbon 72, 82 Transfer ribbon 73, 83 thermal head 74, 84 Platen roller 75, 85 Laminating roller 86 Swing Roller 87 Moving Belt 88, 88a, 88b recesses 210 Picture printed overlay film

Claims

1. A base sheet; a transfer film formed on one surface of the base sheet, the transfer film is formed of multiple layers containing an antiviral agent, each of the plurality of layers in the transfer film is formed containing a resin and the antiviral agent; the plurality of layers include a release layer in contact with the one surface side of the base sheet, an image receiving layer located on the surface layer side of the transfer film, and an anchor layer located between the release layer and the image receiving layer; the release layer and the anchor layer contain, as the antiviral agent, either an organic antiviral agent or an inorganic antiviral agent, The image receiving layer contains an organic antiviral agent as the antiviral agent. A transfer overlay film.

2. The content of the organic antiviral agent in each of the release layer, the anchor layer, and the image-receiving layer is in the range of 8 parts by mass to 17 parts by mass relative to 100 parts by mass of the resin.

2. The transfer overlay film of claim 1.

3. The content of the inorganic antiviral agent in each of the release layer and the anchor layer is in the range of 0.7 parts by mass or more and 3.0 parts by mass or less per 100 parts by mass of resin.

2. The transfer overlay film of claim 1.

4. Either the release layer or the anchor layer contains an inorganic antiviral agent as the antiviral agent, and the other contains an organic antiviral agent as the antiviral agent.

4. The transfer overlay film according to claim 1.

5. Both the release layer and the anchor layer contain an organic antiviral agent as the antiviral agent.

4. The transfer overlay film according to claim 1.

6. Both the release layer and the anchor layer contain an inorganic antiviral agent as the antiviral agent.

4. The transfer overlay film according to claim 1.

7. The content of the antiviral agent is the highest in the image receiving layer among the plurality of layers of the transfer film. The transfer overlay film of claim 1 , wherein the transfer overlay film is a film having a thickness of 100 nm or less.

8. The release layer contains an acrylic resin as the resin. The transfer overlay film of any one of claims 1 to 7.

9. The thickness of the release layer is in the range of 0.5 μm to 3.0 μm.

7. The transfer overlay film according to claim 3, wherein:

10. The thickness of the anchor layer is in the range of 0.5 μm to 2.0 μm.

8. The transfer overlay film according to claim 3, wherein:

11. The thickness of the image receiving layer is in the range of 1.0 μm to 7.0 μm.

9. The transfer overlay film according to claim 3, wherein:

12. The transfer film contains polyethylene wax.

12. The transfer overlay film of claim 1.

13. A core substrate; The transfer film of the transfer overlay film according to any one of claims 1 to 12 is laminated on at least one surface side of the core substrate. Antiviral card.

14. a picture print layer provided between at least one surface of the core substrate and the transfer film, on which a predetermined image is formed; 14. The antiviral card according to claim 13.

15. At least one surface of the core substrate and at least a part of a side surface of the core substrate are continuously covered with the transfer film.

15. The antiviral card according to claim 13 or 14.

Images