Card and method for manufacturing the same

Abstract

The present invention provides a card that can enhance its design and a method for manufacturing the same. [Solution] The card 100 comprises a plate-shaped core substrate 1 having a first main surface 1a, and a black layer 4, a polarizing ink layer 5, a printing layer 6, and a protective layer 8 sequentially laminated on the first main surface 1a of the core substrate 1. The black layer 4 and the polarizing ink layer 5 are formed on the entire surface of the core substrate 1 in a plan view. The card may also have a configuration without the black layer 4, where the first main surface 1a of the core substrate 1 is black.

Description

[Technical Field]

[0001] The present invention relates to a card and a method for manufacturing the same. [Background technology]

[0002] Cards such as cash cards, credit cards, ID cards, and membership cards are used in a variety of fields. Patent Document 1 discloses a card in which a reflective layer, a latent image forming layer, and an oversheet layer are sequentially formed on a card substrate. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2004-351831 [Overview of the project] [Problems that the invention aims to solve]

[0004] In recent years, the importance of card appearance has increased due to the expanding uses of cards. Therefore, there is a growing demand for cards with aesthetically pleasing designs.

[0005] One aspect of the present invention aims to provide a card that can enhance its design and a method for manufacturing the same. [Means for solving the problem]

[0006] A card according to a first embodiment of the present invention comprises a plate-shaped core substrate having a first main surface, and a black layer, a polarizing ink layer, a printing layer, and a protective layer sequentially laminated on the first main surface of the core substrate, wherein the black layer and the polarizing ink layer are formed over the entire surface of the core substrate in a plan view.

[0007] A second aspect of the present invention comprises a plate-shaped core substrate having at least a first main surface that is black, and a polarizing ink layer, a printing layer, and a protective layer sequentially laminated on the first main surface of the core substrate, wherein the polarizing ink layer is formed over the entire surface of the core substrate in a plan view.

[0008] A third aspect of the present invention is a card according to the first or second aspect, wherein the surface of the protective layer has an arithmetic mean roughness Ra of 0.2 μm or more and a ten-point mean roughness Rz of 1.5 μm or more.

[0009] A fourth aspect of the present invention is a card according to any one of the first to third aspects, wherein the printing layer is formed of a second polarizing ink that has a different color from the polarizing ink constituting the polarizing ink layer.

[0010] A fifth aspect of the present invention provides a method for manufacturing a card, comprising the steps of: preparing a plate-shaped core substrate having a first main surface; obtaining a first laminate by laminating a first transfer foil having a black layer and a polarizing ink layer onto the first main surface; forming a second transfer foil by forming a printed layer on a protective layer structure having a protective layer; and obtaining a card in which a black layer, a polarizing ink layer, a printed layer, and a protective layer are sequentially laminated onto the first main surface of the core substrate by laminating the second transfer foil onto the first laminate.

[0011] A sixth aspect of the present invention provides a method for manufacturing a card, comprising the steps of: preparing a plate-shaped core substrate having at least a first main surface that is black; obtaining a first laminate by laminating a first transfer foil having a polarizing ink layer onto the first main surface; forming a second transfer foil by forming a printed layer on a protective layer structure having a protective layer; and obtaining a card in which a polarizing ink layer, a printed layer, and a protective layer are sequentially laminated onto the first main surface of the core substrate by laminating the second transfer foil onto the first laminate.

[0012] A seventh aspect according to the present invention is the method for manufacturing a card according to the fifth or sixth aspect, wherein the surface of the protective layer has an arithmetic mean roughness Ra of 0.2 μm or more, and a ten-point mean roughness Rz of 1.5 μm or more. Effects of the Invention

[0013] According to one aspect of the present invention, it is possible to provide a card capable of enhancing design properties and a method for manufacturing the same. Brief Description of the Drawings

[0014] [Figure 1] It is a schematic diagram showing a cross section of the card according to the first embodiment. [Figure 2] It is a plan view of the card according to the first embodiment. [Figure 3] It is a schematic exploded view of the card according to the first embodiment. [Figure 4] It is an explanatory diagram of the method for manufacturing the card according to the first embodiment. [Figure 5] It is an explanatory diagram of the method for manufacturing the card according to the first embodiment. [Figure 6] It is an explanatory diagram of the method for manufacturing the card according to the first embodiment. [Figure 7] It is an explanatory diagram of the method for manufacturing the card according to the first embodiment. [Figure 8] It is an explanatory diagram of the method for manufacturing the card according to the first embodiment. [Figure 9] It is an explanatory diagram of the method for manufacturing the card according to the first embodiment. [Figure 10] It is an explanatory diagram of the method for manufacturing the card according to the first embodiment. [Figure 11] It is an explanatory diagram of the method for manufacturing the card according to the first embodiment. [Figure 12] It is an explanatory diagram of the method for manufacturing the card according to the first embodiment. [Figure 13] It is a schematic diagram showing a cross section of the card according to the second embodiment. [Figure 14] It is an explanatory diagram of the method for manufacturing the card according to the second embodiment. [Figure 15]This is an explanatory diagram of the card manufacturing method according to the second embodiment. [Figure 16] This is an explanatory diagram of the card manufacturing method according to the second embodiment. [Figure 17] This is an explanatory diagram of the card manufacturing method according to the second embodiment. [Figure 18] This is an explanatory diagram of the card manufacturing method according to the second embodiment. [Figure 19] This is an explanatory diagram of the card manufacturing method according to the second embodiment. [Modes for carrying out the invention]

[0015] The card according to the embodiment and its manufacturing method will be described in detail below with reference to the drawings.

[0016] [Card] (First Embodiment) Figure 1 is a schematic diagram showing a cross-section of card 100 according to the first embodiment. Figure 2 is a plan view of card 100. Figure 3 is a schematic exploded view of card 100. Figure 1 shows a cross-section perpendicular to the long side direction of card 100. In the following description, the upper and lower positional relationships are tentatively defined according to Figure 1. The upper side of Figure 1 is the upper side. The lower side of Figure 1 is the lower side. The positional relationships defined herein do not limit the orientation of the card when it is in use.

[0017] As shown in Figure 1, the card 100 comprises a core substrate 1, a first outer layer substrate 2, an adhesive layer 3, a black layer 4, a polarizing ink layer 5, a first printing layer 6, an adhesive layer 7, a first protective layer 8, a second outer layer substrate 9, a second printing layer 10, an adhesive layer 11, and a second protective layer 12. The upper surface (one side) of the core substrate 1 in Figure 1 is the first main surface 1a. The lower surface (the other side) of the core substrate 1 in Figure 1 is the second main surface 1b.

[0018] For the first outer layer substrate 2, adhesive layer 3, black layer 4, polarizing ink layer 5, first printing layer 6, adhesive layer 7, and first protective layer 8, the upper side of the core substrate 1 is the outer surface. The first outer layer substrate 2, adhesive layer 3, black layer 4, polarizing ink layer 5, first printing layer 6, adhesive layer 7, and first protective layer 8 are laminated in this order on the first main surface 1a of the core substrate 1.

[0019] For the second outer layer substrate 9, the second printing layer 10, the adhesive layer 11, and the second protective layer 12, the lower side of the core substrate 1 is the outer surface. The second outer layer substrate 9, the second printing layer 10, the adhesive layer 11, and the second protective layer 12 are laminated in this order on the second main surface 1b of the core substrate 1.

[0020] As shown in Figure 2, the core substrate 1 is formed in the shape of a plate. The core substrate 1 is made of resin or the like. The core substrate 1 is, for example, rectangular in shape when viewed from above. The core substrate 1 is, for example, rectangular in shape when viewed from above.

[0021] As shown in Figure 1, examples of materials for the core substrate 1 include polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, copolymer of terephthalic acid with cyclohexanedimethanol and ethylene glycol, polyester (polyethylene terephthalate, polybutylene terephthalate, etc.), and acrylonitrile-butadiene-styrene copolymer synthetic resin (ABS).

[0022] The color of the core substrate 1 is not particularly limited. The color of the core substrate 1 may be, for example, white or black.

[0023] The first outer layer substrate 2 is formed on the first main surface 1a of the core substrate 1. The second outer layer substrate 9 is formed on the second main surface 1b of the core substrate 1. The first outer layer substrate 2 and the second outer layer substrate 9 are formed on the entire surface of the core substrate 1 in a plan view.

[0024] The first outer layer substrate 2 and the second outer layer substrate 9 are formed from resin or the like. Examples of materials for the first outer layer substrate 2 and the second outer layer substrate 9 include polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, copolymer of terephthalic acid with cyclohexanedimethanol and ethylene glycol, polyester (polyethylene terephthalate, polybutylene terephthalate, etc.), and acrylonitrile-butadiene-styrene copolymer synthetic resin (ABS).

[0025] The first outer layer substrate 2 and the second outer layer substrate 9 are preferably colorless and transparent. Transparency means, for example, that the transmittance of visible light with a wavelength of 550 nm in the thickness direction (for example, according to JIS K7361) is 50% or more.

[0026] A magnetic stripe 13 (magnetic tape) is provided on the upper surface 2a (outer surface) of the first outer layer substrate 2. A magnetic stripe 14 (magnetic tape) is provided on the lower surface 9a (outer surface) of the second outer layer substrate 9. The magnetic stripes 13 and 14 function as magnetic recording layers. The magnetic stripe 13 is provided on a part of the upper surface 2a of the first outer layer substrate 2. The magnetic stripe 13 is formed in a strip shape along the long side direction of the first outer layer substrate 2 (see Figure 4). The magnetic stripe 14 is provided on a part of the lower surface 9a of the second outer layer substrate 9. The magnetic stripe 14 is formed in a strip shape along the long side direction of the second outer layer substrate 9.

[0027] The adhesive layer 3 is formed of, for example, an acrylic resin, a vinyl chloride-vinyl acetate copolymer, etc. The adhesive layer 3 may be transparent. The adhesive layer 3 is formed on the upper surface 2a of the first outer layer substrate 2. In a plan view, the adhesive layer 3 is formed over the entire surface of the core substrate 1.

[0028] The black layer 4 is formed on the upper (outer) side of the first outer substrate 2 via the adhesive layer 3. The black layer 4 is formed on the upper (outer) side of the core substrate 1 via the first outer substrate 2 and the adhesive layer 3. In a plan view, the black layer 4 is formed over the entire surface of the core substrate 1. In a plan view, the black layer 4 is identical in shape to the core substrate 1. The black layer 4 is bonded to the upper surface 2a of the first outer substrate 2 via the adhesive layer 3.

[0029] The black layer 4 exhibits a black color. The black layer 4 contains a black pigment. The black pigment may be, for example, an inorganic pigment such as carbon black or titanium black, or an organic pigment such as a lactam-based pigment, a benzofuranone-based pigment, an azo-based pigment, or a perylene-based pigment. The black layer 4 may be formed from a base resin containing the black pigment. Examples of the base resin include polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, a copolymer of terephthalic acid, cyclohexanedimethanol and ethylene glycol, polyesters (polyethylene terephthalate, polybutylene terephthalate, etc.), acrylonitrile-butadiene-styrene copolymer synthetic resin (ABS), and the like. The black layer 4 is, for example, opaque. The black layer 4 may be formed from a film containing the black pigment and the base resin, or may be formed by applying a black ink.

[0030] The color of the black layer 4 is, for example, L * a * b * color system (in accordance with JIS Z8781-4), a color that satisfies L * ≦20, a * ≦20, b * ≦20. Even if any of L * , a * , b * falls outside this range, it can be recognized as black if it can be visually confirmed as black. For color measurement, for example, a spectrophotometer CM-36dGV manufactured by Konica Minolta, Inc. can be used.

[0031] The polarizing ink layer 5 is formed on the upper side (outer surface side) of the black layer 4. The polarizing ink layer 5 is formed over the entire surface of the core base material 1 in a plan view. The polarizing ink layer 5 has the same shape as the core base material 1 in a plan view. The polarizing ink layer 5 has visible light transmittance in the thickness direction. The polarizing ink layer 5 may be transparent.

[0032] The polarizing ink layer 5 exhibits single colors (e.g., blue, red, yellow, green, orange, purple, silver, gold, etc.) and intermediate colors (colors resulting from a mixture of multiple single colors) by absorbing light in a specific wavelength range. The polarizing ink layer 5 contains, for example, a first polarizing ink containing a polarizing pigment that exhibits the aforementioned color (single color, intermediate color, etc.) and a base resin. The polarizing ink is, for example, circularly polarized. When visible light is irradiated onto the polarizing ink layer 5, the components of the reflected light change depending on the direction in which the observer views the polarizing ink layer 5. The polarizing ink layer 5 exhibits color changes and increases or decreases in brightness depending on the direction in which the observer views it, due to the adjustment of reflected light by the action of the polarizing pigment. The polarizing ink layer 5 may also contain metal particles. The metal particles, for example, give gloss to the polarizing ink layer 5.

[0033] The polarizing ink layer 5 may be formed by a film containing polarizing ink and a base resin, or by applying polarizing ink. Methods for applying polarizing ink include printing methods (screen printing, offset printing, gravure printing, etc.), bar coating, gravure, and roll coating.

[0034] The first printing layer 6 is formed on the upper side (outer side) of the polarizing ink layer 5 (see Figure 2). The first printing layer 6 is formed, for example, on a part (or all) area of ​​the polarizing ink layer 5 in a plan view. The first printing layer 6 is, for example, a different color from the polarizing ink layer 5. The first printing layer 6 is an example of a "printing layer". The second printing layer 10 is formed on the lower side (outer side) of the second outer layer substrate 9. The second printing layer 10 is formed, for example, on a part (or all) area of ​​the second outer layer substrate 9 in a plan view. The second printing layer 10 is, for example, a different color from the second outer layer substrate 9.

[0035] The first printing layer 6 and the second printing layer 10 are formed by screen printing, offset printing, gravure printing, or the like. The ink used for the first printing layer 6 and the second printing layer 10 may be transparent or opaque.

[0036] The ink used in the first printing layer 6 may be a different polarizing ink (second polarizing ink) from the first polarizing ink used in the polarizing ink layer 5. The second polarizing ink may, for example, have a different color from the first polarizing ink. The second polarizing ink may, for example, use a different polarizing pigment than the first polarizing ink. The second polarizing ink may, for example, be a pearl ink containing a pearl pigment. The first printing layer 6 formed with the second polarizing ink may exhibit color changes and brightness increases or decreases depending on the direction from which the observer views it, but these color changes will differ from those of the polarizing ink layer 5. By using the second polarizing ink in the first printing layer 6, the aesthetic appearance and legibility of the information displayed by the first printing layer 6 can be enhanced.

[0037] The first printing layer 6 and the second printing layer 10 can represent, for example, characters, symbols, figures, patterns, colors, or combinations of two or more of these. The shape of the first printing layer 6 and the second printing layer 10 is not particularly limited. The first printing layer 6 and the second printing layer 10 display information. For example, the first printing layer 6 and the second printing layer 10 can display information such as brand name, name, identification number, expiration date, photographic image, security code, etc.

[0038] The adhesive layer 7 is formed on the upper side (outer side) of the polarizing ink layer 5 and the first printing layer 6. The adhesive layer 11 is formed on the lower side (outer side) of the second outer layer substrate 9 and the second printing layer 10. The adhesive layers 7 and 11 are made of, for example, acrylic resin, vinyl chloride-vinyl acetate copolymer, etc. The adhesive layers 7 and 11 are transparent. The adhesive layers 7 and 11 are formed on the entire surface of the core substrate 1 in a plan view.

[0039] The first protective layer 8 is formed on the upper side (outer side) of the adhesive layer 7. The first protective layer 8 is an example of a "protective layer". The second protective layer 12 is formed on the lower side (outer side) of the adhesive layer 11. Both the first protective layer 8 and the second protective layer 12 are transparent. In a plan view, both the first protective layer 8 and the second protective layer 12 are formed over the entire surface of the core substrate 1.

[0040] Examples of materials for the first protective layer 8 and the second protective layer 12 include thermoplastic resins, thermosetting resins, ultraviolet-curable resins, and electron-beam-curable resins. Specific examples of resins include vinyl chloride-vinyl acetate copolymers, positive vinyl alcohol, positive ester resins, polyurethane resins, and acrylic resins.

[0041] The surface 8a (outer surface) of the first protective layer 8 and the surface 12a (outer surface) of the second protective layer 12 may be surfaces with irregularities (matte-finished surfaces). Preferably, the surface 8a of the first protective layer 8 and the surface 12a of the second protective layer 12 have an arithmetic mean roughness Ra of 0.2 μm or more and a ten-point mean roughness Rz of 1.5 μm or more. The arithmetic mean roughness Ra of surfaces 8a and 12a may be 10 μm or less (for example, 1 μm or less). The ten-point mean roughness Rz of surfaces 8a and 12a may be 10 μm or less.

[0042] The arithmetic mean roughness Ra and the ten-point mean roughness Rz are specified in JIS B0601:2001. The arithmetic mean roughness Ra and the ten-point mean roughness Rz can be measured, for example, by a surface roughness meter (Mitutoyo Corporation, model SJ-310).

[0043] Card 100 can be used as a cash card, credit card, ID card, membership card, etc.

[0044] [Method for manufacturing a card] (First embodiment) Next, an example of a method for manufacturing card 100 will be described with reference to Figures 4 to 12. Figures 4 to 12 are explanatory diagrams of the method for manufacturing card 100.

[0045] (Step 1: Preparation of core substrate) Figure 4 is a plan view of the substrate laminate 21. Figure 5 is a cross-sectional view of the substrate laminate 21. As shown in Figures 4 and 5, the first outer layer substrate 2 is laminated onto the first main surface 1a of the core substrate 1. The second outer layer substrate 9 is laminated onto the second main surface 1b of the core substrate 1. This results in a substrate laminate 21 (card substrate) in which the second outer layer substrate 9, the core substrate 1, and the first outer layer substrate 2 are laminated in this order.

[0046] (Step 2: Lamination of the first transfer foil) Figure 6 is a cross-sectional view of the substrate laminate 21 and the first transfer foil 22. Figure 7 is a cross-sectional view of the laminate 23 formed by laminating the substrate laminate 21 and the first transfer foil 22. As shown in Figures 6 and 7, the first transfer foil 22 is laminated onto the upper surface 2a of the substrate laminate 21. The first transfer foil 22 comprises an adhesive layer 3, a black layer 4, a polarizing ink layer 5, a release layer 31, and a base film 32. This results in a laminate 23 in which the first transfer foil 22 is laminated on the substrate laminate 21. The black layer 4 and the polarizing ink layer 5 are sized to cover the entire surface of the core substrate 1 in a plan view.

[0047] In the first transfer foil 22, the upper side in Figure 6 is the outer surface. The adhesive layer 3, black layer 4, polarizing ink layer 5, release layer 31, and base film 32 are laminated in this order. Examples of materials for the release layer 31 include urethane resin, melamine resin, cellulose resin, epoxy resin, acrylic resin, butyral resin, and vinyl chloride / vinyl acetate copolymer resin. The base film 32 is a film formed from, for example, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene (PE), polypropylene (PP), polycarbonate, polyimide, etc.

[0048] Figure 8 is a cross-sectional view showing the laminate 24. Figure 9 is a plan view of the laminate 24 shown in Figure 8. As shown in Figures 8 and 9, the base film 32 and the release layer 31 are peeled off from the laminate 23 (see Figure 7) to obtain the laminate 24 (first laminate).

[0049] (Step 3: Formation of the second transfer foil) Figure 10 is a cross-sectional view of the laminate 24 and the second transfer foil 26. As shown in Figure 10, a laminate 25 (protective layer structure) is prepared, comprising an adhesive layer 7, a first protective layer 8, a release layer 33, and a base film 34. In the laminate 25, the upper side in Figure 10 is the outer surface. The adhesive layer 7, the first protective layer 8, the release layer 33, and the base film 34 are laminated in this order. The release layer 33 may have the same configuration as the release layer 31 (see Figure 6). The base film 34 may have the same configuration as the base film 32 (see Figure 6).

[0050] The surface 8a of the first protective layer 8 may be an uneven surface (matte finish surface). To make the surface 8a of the first protective layer 8 an uneven surface, the laminate 25 can be made using a base film 34 whose bottom surface (the surface facing the first protective layer 8) is an uneven surface. Preferably, the surface 8a of the first protective layer 8 has an arithmetic mean roughness Ra of 0.2 μm or more and a ten-point mean roughness Rz of 1.5 μm or more.

[0051] The second transfer foil 26 is obtained by forming a first printing layer 6 on the lower surface of the laminate 25 (the lower surface of the adhesive layer 7). The first printing layer 6 is formed by screen printing, offset printing, gravure printing, etc. The second transfer foil 26 comprises the first printing layer 6, the adhesive layer 7, the first protective layer 8, the release layer 33, and the base film 34. In the second transfer foil 26, the upper side in Figure 10 is the outer surface. The first printing layer 6, the adhesive layer 7, the first protective layer 8, the release layer 33, and the base film 34 are laminated in this order.

[0052] (Step 4: Lamination of the second transfer foil) Figure 11 is a cross-sectional view of a laminate 27 formed by laminating the laminate 24 and the second transfer foil 26. As shown in Figure 11, the laminate 27 is obtained by laminating the second transfer foil 26 onto the upper surface of the polarizing ink layer 5 of the laminate 24.

[0053] Figure 12 is a cross-sectional view showing the laminate 28 and the third transfer foil 30. As shown in Figure 12, the laminate 28 is obtained by peeling off the base film 34 and the release layer 33 from the laminate 27 (see Figure 11).

[0054] (Step 5: Formation of the third transfer foil) A laminate 29 of an adhesive layer 11 and a second protective layer 12 is prepared. A third transfer foil 30 is obtained by forming a second printing layer 10 on the surface of the adhesive layer 11 of the laminate 29. The second printing layer 10 is formed by screen printing, offset printing, gravure printing, etc. The surface 12a of the second protective layer 12 may be an uneven surface (matte finish surface).

[0055] (Step 6: Lamination of the third transfer foil) The third transfer foil 30 comprises a second printing layer 10, an adhesive layer 11, and a second protective layer 12. The third transfer foil 30 is laminated onto the lower surface 9a (outer surface) of the second outer layer substrate 9 of the laminate 28. Through the above steps, the card 100 shown in Figure 1 is obtained.

[0056] [Effects of the card and its manufacturing method according to the embodiment] In the card 100 according to this embodiment, the black layer 4 and the polarizing ink layer 5 are formed across the entire surface of the core substrate 1 in a plan view. Because the black layer 4 is formed over a wide area, the color development of the polarizing ink layer 5 can be improved. Because the polarizing ink layer 5 is formed over a wide area, its characteristic of changing color and brightness depending on the viewing direction can be fully exhibited. Therefore, the design appeal of the card 100 can be enhanced.

[0057] In card 100, the surface 8a of the first protective layer 8 may have an arithmetic mean roughness Ra of 0.2 μm or more and a ten-point mean roughness Rz of 1.5 μm or more. This reduces the glossiness of the surface of card 100. Thus, a card 100 with a subdued appearance can be provided.

[0058] The ink used in the first printing layer 6 may be a different polarizing ink (a second polarizing ink) from the first polarizing ink used in the polarizing ink layer 5. By using the second polarizing ink in the first printing layer 6, the aesthetic appearance and legibility of the information displayed by the first printing layer 6 can be enhanced. When the first printing layer 6 consists of the second polarizing ink, the first printing layer 6 is given visible light transmittance. Therefore, the polarizing ink layer 5 can be seen through the first printing layer 6. Consequently, a visual effect may occur in the first printing layer 6 due to the two layers of polarizing ink.

[0059] The method for manufacturing the card 100 according to this embodiment (see Figures 4 to 12) includes the steps of preparing a core substrate 1, laminating a first transfer foil 22, forming a second transfer foil 26, and laminating the second transfer foil 26. With this method, the black layer 4 is formed over the entire surface of the core substrate 1 in a plan view, which improves the color development of the polarizing ink layer 5. Since the polarizing ink layer 5 is formed over a wide area, it can fully exhibit the characteristics of color change and brightness increase or decrease depending on the viewing direction. Therefore, the design appeal of the card 100 can be enhanced.

[0060] In the manufacturing method of the card 100 according to this embodiment, the first transfer foil 22 is used to form the black layer 4 and the polarizing ink layer 5. The second transfer foil 26 is used to form the first printing layer 6 and the first protective layer 8. Therefore, the number of steps required to manufacture the card 100 can be reduced. Thus, the card 100 can be easily manufactured.

[0061] [Card] (Second Embodiment) Figure 13 is a schematic diagram showing a cross-section of the card 200 according to the second embodiment. Components common to the card 100 according to the first embodiment are denoted by the same reference numerals and their descriptions are omitted.

[0062] As shown in Figure 13, the card 200 comprises a core substrate 101, a first outer layer substrate 2, an adhesive layer 3, a polarizing ink layer 5, a first printing layer 6, an adhesive layer 7, a first protective layer 8, a second outer layer substrate 9, a second printing layer 10, an adhesive layer 11, and a second protective layer 12. The upper surface (one side) of the core substrate 101 is the first main surface 101a. The lower surface (the other side) of the core substrate 101 is the second main surface 101b.

[0063] For the first outer layer substrate 2, adhesive layer 3, polarizing ink layer 5, first printing layer 6, adhesive layer 7, and first protective layer 8, the upper side of the core substrate 101 is the outer surface. The first outer layer substrate 2, adhesive layer 3, polarizing ink layer 5, first printing layer 6, adhesive layer 7, and first protective layer 8 are laminated in this order on the first main surface 101a of the core substrate 101.

[0064] The second outer layer substrate 9, the second printing layer 10, the adhesive layer 11, and the second protective layer 12 are laminated in this order on the second main surface 101b of the core substrate 1.

[0065] Card 200 differs from card 100 according to the first embodiment (see Figure 1) in that it does not have a black layer 4 and uses a core substrate 101 instead of a core substrate 1.

[0066] The core substrate 101 is formed in a plate shape. The core substrate 101 has at least a first main surface 101a that is black. The entire first main surface 101a is black. The color of the first main surface 101a is, for example, L * a * b * In the color system (compliant with JIS Z8781-4), L * ≤20, a * ≤20, b * These are colors such that ≤ 20. * a * , b *Even if any of these fall outside this range, if it can be confirmed as black by visual judgment, it can be recognized as black. For color measurement, for example, a Konica Minolta spectrophotometer CM-36dGV can be used. The core substrate 101 may be black only in the surface area including the first main surface 101a, or the entire material may be black.

[0067] The core substrate 101 is formed, for example, from a substrate resin containing a black pigment. The black pigment may be an inorganic pigment such as carbon black or titanium black, or an organic pigment such as a lactam pigment, a benzofuranone pigment, an azo pigment, or a perylene pigment. Examples of substrate resins include polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, copolymer of terephthalic acid with cyclohexanedimethanol and ethylene glycol, polyester (polyethylene terephthalate, polybutylene terephthalate, etc.), and acrylonitrile-butadiene-styrene copolymer synthetic resin (ABS).

[0068] The polarizing ink layer 5 is formed on the upper side (outer surface side) of the first outer layer substrate 2 via the adhesive layer 3. The polarizing ink layer 5 is formed on the upper side (outer surface side) of the core substrate 1 via the first outer layer substrate 2 and the adhesive layer 3. In a plan view, the polarizing ink layer 5 is formed over the entire surface of the core substrate 1.

[0069] [Method for manufacturing a card] (Second embodiment) Next, an example of a method for manufacturing the card 200 will be described with reference to Figures 14 to 19. Figures 14 to 19 are explanatory diagrams of the method for manufacturing the card 200.

[0070] (Step 1: Preparation of core substrate) Figure 14 is a cross-sectional view of the substrate laminate 121 and the first transfer foil 122. As shown in Figure 14, the first outer layer substrate 2 is laminated onto the first main surface 101a of the core substrate 101. The second outer layer substrate 9 is laminated onto the second main surface 101b of the core substrate 101. This results in a substrate laminate 121 (card substrate) in which the second outer layer substrate 9, the core substrate 101, and the first outer layer substrate 2 are laminated in this order. The first transfer foil 122 comprises an adhesive layer 3, a polarizing ink layer 5, a release layer 31, and a base film 32.

[0071] (Step 2: Lamination of the first transfer foil) Figure 15 is a cross-sectional view of a laminate 123 formed by laminating a substrate laminate 121 and a first transfer foil 122. As shown in Figure 15, the first transfer foil 122 is laminated onto the upper surface 2a of the substrate laminate 121. This results in a laminate 123 in which the first transfer foil 122 is laminated on top of the substrate laminate 121. The polarizing ink layer 5 is sized to cover the entire surface of the core substrate 101 in a plan view.

[0072] Figure 16 is a cross-sectional view showing the laminate 124. As shown in Figure 16, the base film 32 and the release layer 31 are peeled off from the laminate 123 (see Figure 15) to obtain the laminate 124 (first laminate).

[0073] (Step 3: Formation of the second transfer foil) Figure 17 is a cross-sectional view of the laminate 124 and the second transfer foil 26. As shown in Figure 17, a laminate 25 (protective layer structure) is prepared. A second transfer foil 26 is obtained by forming a first printing layer 6 on the lower surface of the laminate 25 (the lower surface of the adhesive layer 7).

[0074] (Step 4: Lamination of the second transfer foil) Figure 18 is a cross-sectional view of the laminate 127, which is formed by laminating the laminate 124 and the second transfer foil 26. As shown in Figure 18, the second transfer foil 26 is laminated on the upper surface of the polarizing ink layer 5 of the laminate 124.

[0075] Figure 19 is a cross-sectional view showing the laminate 128 and the third transfer foil 30. As shown in Figure 19, the laminate 128 is obtained by peeling off the base film 34 and the release layer 33 from the laminate 127 (see Figure 18).

[0076] (Step 5: Formation of the third transfer foil) A third transfer foil 30 is obtained by forming a second printing layer 10 on the surface of the adhesive layer 11 of the laminate 29.

[0077] (Step 6: Lamination of the third transfer foil) The third transfer foil 30 is laminated onto the lower surface 9a (outer surface) of the second outer layer substrate 9 of the laminate 128. Through the above steps, the card 200 shown in Figure 13 is obtained.

[0078] [Effects of the card and its manufacturing method according to the embodiment] In the card 200 according to this embodiment, the first main surface 101a of the core substrate 101 is black. The polarizing ink layer 5 is formed over the entire surface of the core substrate 101 in a plan view. Because the first main surface 101a is black, the color development of the polarizing ink layer 5 can be improved. Because the polarizing ink layer 5 is formed over a wide area, the characteristic of color change and brightness increase / decrease depending on the viewing direction can be fully exhibited. Therefore, the design appeal of the card 200 can be enhanced.

[0079] In card 200, the surface 8a of the first protective layer 8 may have an arithmetic mean roughness Ra of 0.2 μm or more and a ten-point mean roughness Rz of 1.5 μm or more. This reduces the glossiness of the surface of card 200. Thus, a card 200 with a subdued appearance can be provided.

[0080] The ink used in the first printing layer 6 may be a different polarizing ink (a second polarizing ink) from the first polarizing ink used in the polarizing ink layer 5. By using the second polarizing ink in the first printing layer 6, the aesthetic appearance and legibility of the information displayed by the first printing layer 6 can be enhanced. When the first printing layer 6 consists of the second polarizing ink, the first printing layer 6 is given visible light transmittance. Therefore, the polarizing ink layer 5 can be seen through the first printing layer 6. Consequently, a visual effect may occur in the first printing layer 6 due to the two layers of polarizing ink.

[0081] The method for manufacturing the card 200 according to this embodiment (see Figures 14 to 19) includes the steps of preparing a core substrate 101, laminating a first transfer foil 122, forming a second transfer foil 26, and laminating the second transfer foil 26. With this method, since the first main surface 101a of the core substrate 101 is black, the color development of the polarizing ink layer 5 can be improved. Since the polarizing ink layer 5 is formed over a wide area, the characteristic of color change and brightness increase or decrease depending on the viewing direction can be fully exhibited. Therefore, the design appeal of the card 200 can be enhanced.

[0082] In the manufacturing method of the card 200 according to this embodiment, the first transfer foil 122 is used to form the polarizing ink layer 5. The second transfer foil 26 is used to form the first printing layer 6 and the first protective layer 8. Therefore, the number of steps required to manufacture the card 200 can be reduced. Thus, the card 200 can be easily manufactured.

[0083] Although embodiments of the present invention have been described above, the configurations and combinations thereof in the embodiments are merely examples, and additions, omissions, substitutions, and other modifications to the configurations are possible without departing from the spirit of the present invention. The black layer may be formed on the outer surface of the core substrate without any intervening material, or it may be formed on the outer side of the core substrate via other layers. The polarizing ink layer may be formed on the outer surface of the black layer without any intervening material, or it may be formed on the outer side of the black layer via other layers. The printing layer may be formed on the outer surface of the polarizing ink layer without any intervening material, or it may be formed on the outer side of the polarizing ink layer via other layers. The protective layer may be formed on the outer surface of the printing layer without any intervening material, or it may be formed on the outer side of the printing layer via other layers.

[0084] In the manufacturing method shown in Figures 4 to 12, a method was employed to form the black layer 4 and the polarizing ink layer 5 by laminating a first transfer foil 22 having a black layer 4 and a polarizing ink layer 5 onto a first outer layer substrate 2. However, the method for forming the black layer 4 and the polarizing ink layer 5 is not particularly limited. The black layer 4 can also be formed by applying black ink. The polarizing ink layer 5 can also be formed by applying polarizing ink. Thus, the black layer, polarizing ink layer, printing layer, and protective layer may be formed on the surface to be formed without intermediaries (i.e., directly) or on the surface to be formed via other layers (i.e., indirectly).

[0085] In the card 100 shown in Figure 1, a first outer layer substrate 2 and a second outer layer substrate 9 are formed on both sides of the core substrate 1, but the card does not necessarily have to have the first outer layer substrate and the second outer layer substrate. In the card 100 shown in Figure 1, magnetic stripes 13 and 14 are formed on the outer layer substrates 2 and 9, but the card does not necessarily have to have magnetic stripes. [Explanation of Symbols]

[0086] 1,101…Core substrate, 1a,101a…First main surface, 4…Black layer, 5…Polarizing ink layer, 6…First printing layer (printing layer), 8…First protective layer (protective layer), 8a…Surface, 22,122…First transfer foil, 24,124…Laminate (first laminate), 25…Laminate (protective layer structure), 26…Second transfer foil, 100,200…Card

Claims

1. A plate-shaped core substrate having a first main surface, The core substrate comprises a black layer, a polarizing ink layer, a printing layer, and a protective layer, which are sequentially laminated on the first main surface of the core substrate. The black layer and the polarizing ink layer are formed on the entire surface of the core substrate in a plan view. card.

2. A plate-shaped core substrate having at least one first main surface that is black, The core substrate comprises a polarizing ink layer, a printing layer, and a protective layer, which are sequentially laminated on the first main surface of the core substrate. The polarizing ink layer is formed on the entire surface of the core substrate in a plan view. card.

3. The surface of the protective layer has an arithmetic mean roughness Ra of 0.2 μm or more and a ten-point mean roughness Rz of 1.5 μm or more. The card according to claim 1 or 2.

4. The printed layer is formed by a second polarizing ink that has a different color from the polarizing ink that constitutes the polarizing ink layer. The card according to claim 1 or 2.

5. A step of preparing a plate-shaped core substrate having a first main surface, A step of obtaining a first laminate by laminating a first transfer foil having a black layer and a polarizing ink layer onto the first main surface, A step of forming a second transfer foil by forming a printed layer on a protective layer structure having a protective layer, A step of laminating the second transfer foil onto the first laminate to obtain a card in which the black layer, the polarizing ink layer, the printing layer, and the protective layer are sequentially laminated on the first main surface of the core substrate, A method for manufacturing a card, comprising:

6. A step of preparing a plate-shaped core substrate in which at least the first main surface is black, A step of obtaining a first laminate by laminating a first transfer foil having a polarizing ink layer onto the first main surface, A step of forming a second transfer foil by forming a printed layer on a protective layer structure having a protective layer, A step of obtaining a card in which the polarizing ink layer, the printing layer, and the protective layer are sequentially laminated on the first main surface of the core substrate by laminating the second transfer foil onto the first laminate, A method for manufacturing a card, comprising:

7. The surface of the protective layer shall have an arithmetic mean roughness Ra of 0.2 μm or more, and a ten-point mean roughness Rz of 1.5 μm or more. A method for manufacturing a card according to claim 5 or 6.

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