JP7319880B2 - Authenticity determination card and its manufacturing method - Google Patents

Description

TECHNICAL FIELD The present invention relates to an authentication card containing a hidden pattern that is invisible with a watermark, and a method for manufacturing the same.

In recent years, various cards such as credit cards that are difficult to counterfeit are known. It is desired that such a card is difficult to forge, has a good design, and has high security.

Conventionally, cards described in Patent Documents 1 to 3 and the like are known as cards that are difficult to forge. Patent Document 1 describes a card in which a two-dimensional area sign is formed by partially overlapping printed layers having a multilayer structure with partially cut portions on a substrate, and the sign is visually recognized by incident light and transmitted light. is described.

Further, in Patent Document 2, a pattern is printed on a center core sheet layer A in a solid white negative pattern by printing. It has a laminated structure, and the white pattern is not visible to the naked eye in a normal state, but the card is identified by looking through it.

Further, in Patent Document 3, a watermarked card in which a watermark pattern is printed with dark ink between two laminated white resin layers constituting a core layer, and a magnetic layer is formed on one outer surface of the core layer. , and the pattern is recognized as a watermark by holding it up to light.

JP-A-55-095595 JP-A-58-168457 JP 2006-167955 A

However, the card of Patent Document 1 is difficult to counterfeit because the pattern is formed in a two-dimensional area with a multi-layer structure, but it is complicated to manufacture, and the sign can be recognized by holding it up to light. If the pattern is related to personal information, there is a problem that the security is not sufficient. In addition, in the cards of Patent Documents 2 and 3, although the layer structure is simpler than that of Patent Document 1, the pattern pattern is recognized by holding it up to light, which impairs the design. If the pattern is related to personal information, there is a problem that the security is not sufficient. Although there is a card provided with a concealing layer for concealing the magnetic layer provided in Patent Document 3, etc., it is merely for concealing the magnetic layer and is not used for authenticity determination and recognition.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an authenticity determination card that is difficult to forge, has a high degree of design and high security, and manufacture thereof.

In order to solve the above-mentioned problems, in the invention of claim 1, a hidden pattern that is invisible with a watermark is provided in the card, and the hidden pattern is visually recognized by light transmitted by intentional light irradiation. A color core layer which is a colored layer as a whole and is provided with the hidden pattern of a color different from the color of the layer at a predetermined position on at least one surface; and a silver layer, the color core layer a first silver hiding layer provided at a position covering at least the hidden pattern on one side of the color core layer on which the hidden pattern is formed; and a silver layer that covers at least the hidden pattern on the other side of the color core layer a second silver hiding layer provided at a corresponding position, a white layer, a first white hiding layer provided on at least the first silver hiding layer, a white layer, and at least the second silver hiding layer; A second white concealing layer provided on the concealing layer, and a visual observation provided entirely as an outermost layer on the surface side on which the concealing pattern is formed and integrated with the concealing pattern at a predetermined position to form an authenticity identification pattern. and a protective layer on which a flexible surface layer pattern is formed.

According to the second aspect of the invention, there is provided a method for manufacturing a card for authenticity determination in which a hidden pattern that is invisible with a watermark is provided in the card, and the hidden pattern is visually recognized by transmitted light by intentional light irradiation. forming the hidden pattern of a color different from the color of the color core layer at a predetermined position on at least one side of the colored color core layer; and covering at least the hidden pattern on one side of the color core layer. forming a silver-colored first silver hiding layer on a position and forming a silver-colored second silver hiding layer on the other side at least at a position corresponding to the hidden pattern; forming a first white hiding layer of and forming a white second white hiding layer on at least the second silver hiding layer; The method includes a step of forming a protective layer, and a step of forming a visible surface layer pattern integrally with the hidden pattern at a predetermined position on the protective layer and serving as an authenticity identification pattern.

According to the invention of claim 1, a hidden pattern of a color different from the color of the layer is provided at a predetermined position on at least one surface of the colored color core layer, and at least one surface and the other surface of the color core layer are hidden. A first silver hiding layer and a second silver hiding layer are provided at positions corresponding to the pattern, and the first white hiding layer and the second white hiding layer are white on the first silver hiding layer and the second silver hiding layer. is provided as the outermost layer on the surface side on which the hidden pattern is formed, and a visible surface layer pattern is formed at a predetermined position integrally with the hidden pattern as an authenticity identification pattern. As a result, the color core layer can enhance the design and allow easy authentication, and the silver first silver hiding layer and second silver hiding layer make the hidden pattern invisible with a watermark. To make it difficult to forge the entire authenticity identification pattern and maintain high security by visually recognizing the authenticity identification pattern in which the hidden pattern and the surface layer pattern are integrated with the transmitted light of intentional light irradiation. is possible.

According to the invention of claim 2, a hidden pattern of a color different from the color of the color core layer is formed at a predetermined position on at least one side of the color core layer which is entirely colored, and one side of the color core layer Forming a first silver hiding layer at a position covering at least the hidden pattern on the upper surface, forming a second silver hiding layer at a position corresponding to at least the hidden pattern on the other side, and forming at least the first silver hiding layer A first white hiding layer is formed thereon, and a second white hiding layer is formed on at least the second silver hiding layer to protect the whole as the outermost layer on the side where the hidden pattern is formed. By forming a layer and forming a visible surface layer pattern as an authenticity identification pattern integrally with the hidden pattern at a predetermined position on the protective layer, it is possible to simply identify the color core layer on which the hidden pattern is formed. It is sufficient to laminate each layer of each color, and the hidden pattern and the surface layer pattern are integrated with the transmitted light by intentional light irradiation, which is invisible with the watermark in a simple process. A card can be manufactured.

1 is a configuration diagram of a first embodiment of an authentication card according to the present invention; FIG. 1. It is process drawing of manufacture of the card|curd for authenticity determination of FIG. FIG. 2 is an explanatory diagram of authenticity determination of the card for authenticity determination in FIG. 1 ; FIG. 4 is a cross-sectional configuration diagram of a second embodiment of the authentication card according to the present invention; FIG. 4 is a cross-sectional configuration diagram of another embodiment of the authentication card according to the present invention;

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a configuration diagram of a first embodiment of an authenticity determination card according to the present invention. FIG. 1(A) is a cross-sectional view of an authentication card, and FIG. 1(B) is a diagram showing the layer structure thereof. In FIGS. 1A and 1B, the card 11 for determining authenticity has a color core layer 12 made mainly of a colored resin and having a thickness of, for example, 560 μm. Known opaque red resins such as vinyl chloride (PVC), polyethylene terephthalate glycol (PET-G), polycarbonate (PC) are used. Red PVC is used in this embodiment. In addition, the overall coloring means that the resin itself has a color, and the color is preferably a primary color.

At a predetermined position on one surface of the color core layer 12, a hidden pattern 13A having a color different from the color of the color core layer 12 (for example, black) is provided by printing with ink to a thickness of 2 μm or less. The hidden pattern 13A is any one of letters, numbers, symbols, and marks for authenticity determination, and may be related to personal information. An IC chip or the like may be mounted on the color core layer 12 .

On the surface of the color core layer 12 on which the hidden pattern 13A is formed, a silver-colored first silver hiding layer 14A is printed, for example, with a known silver ink at a position covering at least the hidden pattern 13A. , for example with a thickness of 2 μm. Here, the entire surface of the color core layer 12 is provided so as to cover the hidden pattern 13A, but it is also possible to cover the region of the hidden pattern 13A and expose other portions of the color core layer 12 ( This also applies to the second silver hiding layer 14B described later).

On the other side of the color core layer 12, a second silver hiding layer 14B having a thickness of 2 .mu.m is provided at least at a position corresponding to the hidden pattern 13A. Here, it is provided on the entire surface of the other surface of the color core layer 12 .

On the first silver hiding layer 14A, a white first white hiding layer 15A is provided with a thickness of 2 μm, for example, by using a known white printing ink, for example, so as to cover the first silver hiding layer 14A.

On the other hand, on the second silver hiding layer 14B, a white second white hiding layer 15B is provided with a thickness of, for example, 2 μm using a known white printing ink, for example, so as to cover the second silver hiding layer 14B. . It should be noted that the first white concealing layer 15A and the second white concealing layer 15B may be appropriately provided with patterns, character information, etc. by printing, for example.

A first protective layer 16A, which is the outermost layer, is provided on the first white concealing layer 15A with a thickness of, for example, 100 μm, and a second protective layer 16B, which is the outermost layer, is provided on the second white concealing layer 15B with a thickness of, for example, 100 μm. provided in For the first protective layer 16A and the second protective layer 16B, transparent known resins such as PET, PVC, PET-G, and PC are used. This embodiment uses PVC.

Here, the first protective layer 16A is provided for the basic purpose of card protection. Indium oxide, which absorbs laser light and develops color as a laser light absorbing material, is added to PVC (PET-G or PC may be used) as a base resin. A surface layer pattern 13B is formed by containing a coloring material such as tin (ITO), a titanium oxide compound, or the like, and coloring the coloring material by laser processing at a desired position. The hidden pattern 13A and the surface layer pattern 13B are integrated to form the authenticity identification pattern 13. FIG.

On the other hand, as another form of formation of the surface layer pattern 13B, the first protective layer 16A can be formed by thermal stimulation. As the material in this case, for example, PET, which is a base resin, containing a heat-sensitive coloring material that develops color upon application of heat may be used. The thermosensitive coloring material includes, for example, a leuco dye, a developer and a binder. The above leuco dyes are known ones, and examples thereof include phthalide compounds, azaphthalide compounds, fluoran compounds and the like. Further, the developer is a known one that is used in combination with the leuco dye, and examples thereof include phenol compounds. In addition, the binder is transparent, translucent, has a property of reaction inertness, and has sufficient strength after drying. is mentioned. These are known.

Furthermore, as another form of forming the surface layer pattern 13B, it can be formed on the first protective layer 16A by thermal transfer or printing with an ink jet printer (described in FIG. 4).

Next, FIG. 2 shows a process chart for manufacturing the authentication card of FIG. Here, a method for manufacturing the structure of the authentication card 11 shown in FIG. 1 will be described. In FIG. 2, first, as shown in FIG. 2(A), a color (black) different from the color (red) of the color core layer 12 is placed at a predetermined position on one surface of the color core layer 12 (FIG. 3, which will be described later). A hidden pattern 13A as shown in (B) is formed by printing, for example.

As shown in FIG. 2B, a first silver hiding layer 14A having a thickness of, for example, 2 μm is formed on the entire surface covering the hidden pattern 13A on one side of the color core layer 12 by printing with silver ink. At the same time, as shown in FIG. 2(C), the entire surface including the positions corresponding to the hidden patterns 13A on the other surface of the color core layer 12 is coated with silver ink in the same manner as the first silver hiding layer 14A. A second silver hiding layer 14B having a thickness of, for example, 2 μm is formed by printing.

Subsequently, as shown in FIG. 2(D), white printing ink is used to print on the first silver hiding layer 14A to form a first white hiding layer 15A with a thickness of, for example, 2 μm. As shown in E), a second white hiding layer 15B having a thickness of, for example, 2 μm is formed on the second silver hiding layer 14B by printing using white printing ink.

Subsequently, as shown in FIG. 2(F), the first protective layer 16A is formed on the first white masking layer 15A by, for example, adhesion. A known adhesive for bonding resin materials is sufficient. Further, as shown in FIG. 2G, the second protective layer 16B is formed on the second white masking layer 15B by adhesion using the same adhesive as above.

Then, as shown in FIG. 2H, a predetermined position of the first protective layer 16A (for example, a position near the hidden pattern 13A in the layer direction and not overlapping the hidden pattern 13A) is irradiated with a laser beam 20 by, for example, a laser processing apparatus. The color developing material of the laser light absorbing material contained in the layer develops a color to form a surface layer pattern 13B as shown in FIG. 3(B) described later. When the first protective layer 16A contains the above-described thermosensitive coloring material, the surface layer pattern 13B is formed by thermal stimulation using a thermal printer or the like. Alternatively, the hidden pattern 13A and the surface layer pattern 13B may be overlapped entirely or partially in the layer direction to form the authenticity identification pattern 13. FIG. This is the same for FIGS. 4 and 5 as well.

Therefore, FIG. 3 shows an explanatory diagram of authenticity judgment of the card for authenticity judgment of FIG. The card 11 for determining authenticity shown in FIG. 1 has a hidden pattern 13A that is invisible when exposed to normal external light due to the first silver hiding layer 14A and the second silver hiding layer 14B (see FIG. 3(B)). ), see the upper part), but the surface layer pattern 13B is visually recognized as shown in the upper part of FIG. 3B. Therefore, as shown in FIG. 3A, irradiation light 21A is emitted from the irradiation light source 21 from the back surface of the authentication card 11 (the surface opposite to the surface on which the hidden pattern 13A is formed on the color core layer 12). The card 11 is intentionally irradiated with light and viewed from the front side of the card 11 for authenticity determination. The irradiation intensity in this case is based on, for example, the intensity of illumination light provided in a smart phone.

As shown in the lower part of FIG. 3(B), the hidden pattern 13A emerges from the transmitted light by the irradiation light 21, and is integrated with the surface pattern 13B to be visually recognized as the authenticity identification pattern 13.

That is, the silver-colored first silver hiding layer 14A and the second silver hiding layer 14B are invisible to the hidden pattern 13A with normal watermarks, and can be visually recognized by transmitted light of intentional light irradiation. By integrating the hidden pattern 13A and the surface layer pattern 13B into the authenticity identification pattern 13, it is possible to make counterfeiting difficult and maintain high security. Further, since the color core layer 12 is colored, the design is high, and since it can be visually recognized from the side, it is possible to easily judge the authenticity.

In addition, at least the first silver hiding layer 14A and the second silver hiding layer 14B, and the first white hiding layer 15A and the second white hiding layer 15B are simply formed with specific colors for the color core layer 12 on which the hidden pattern 13A is formed. In a simple process, the hidden pattern 13A and the surface layer pattern 13B are integrally integrated with the hidden pattern 13A and the surface layer pattern 13B. The card 11 can be manufactured.

Next, FIG. 4 shows a cross-sectional configuration diagram of a second embodiment of the authentication card according to the present invention. The authentication card 11 shown in FIG. 4 has a first protective layer 17A made of a coating material instead of the resin layers used for the first protective layer 16A and the second protective layer 16B of the authentication card 11 shown in FIG. and a second protective layer 17B, and the rest of the structure is the same as that shown in FIG. In this case, the thickness of the color core layer 12 is set to 760 μm in order to ensure strength.

The coating material is a known one, and is formed by printing to a thickness of 2 μm, for example. A surface layer pattern 13C is formed on the coating material as the first protective layer 17A by using, for example, a thermal transfer printer or an inkjet printer.

As described above, by using the first protective layer 17A and the second protective layer 17B using the coating material, compared to the case of using the first protective layer 16A and the second protective layer 16B of the resin layer shown in FIG. In this way, the entire card can be made thinner, and the surface layer pattern 13C which becomes the authenticity identification pattern 13 integrally with the hidden pattern 13A is also formed on the first protective layer 17A.

Next, FIG. 5 shows a cross-sectional configuration diagram of another embodiment of the authentication card according to the present invention. 5A shows another embodiment of the authentication card 11 shown in FIG. 1, and FIG. 5B shows another embodiment of the authentication card 11 shown in FIG.

1 and 4, the hidden pattern 13A is formed on one surface of the color core layer 12. However, in the authentication card 11 shown in FIG. Then, another or the same hidden pattern 13A-1 is provided at a predetermined position on the other surface of the color core layer 12, and in addition, on the second protective layer 16B, the surface layer pattern 13B formed on the first protective layer 16A Similarly to , a surface layer pattern 13B-1 is formed integrally with the hidden pattern 13A-1 to form the authenticity discriminating pattern 13. As shown in FIG.

In addition, in the authentication card 11 shown in FIG. 5B, another or the same hidden pattern 13A-1 is provided at a predetermined position on the other surface of the color core layer 12, and in addition to this, a second protective layer A surface layer pattern 13C-1 is formed on 17B to form the authenticity identification pattern 13 integrally with the hidden pattern 13A-1, similarly to the surface layer pattern 13C formed on the first protective layer 17A.

That is, in the authentication card 11 shown in FIGS. 5A and 5B, any hidden pattern 13A, 13A-1 can be visually recognized by intentional irradiation of light from either side of the card, and the surface layer pattern can be visually recognized. 13B, 13B-1, 13C, and 13C-1 are integrally recognized as the authenticity identification pattern 13, thereby enabling authenticity determination.

INDUSTRIAL APPLICABILITY The authentication card and the manufacturing method thereof according to the present invention can be used in industries such as the manufacture, use, and sale of cards on which a hidden pattern for authentication is formed.

11 Authenticity determination card 12 Color core layer 13 Authenticity identification pattern 13A, 13A-1 Hidden pattern 13B, 13B-1 Surface layer pattern 13C, 13C-1 Surface layer pattern 14A First silver hiding layer 14B Second silver hiding layer 15A First white Hiding layer 15B Second white hiding layer 16A, 17A First protective layer 16B, 17B Second protective layer 20 Laser light 21 Irradiation light source 21A Irradiation light

Claims (2)

A card for authenticity determination in which a hidden pattern that is invisible with a watermark is provided in the card, and the hidden pattern is visually recognized by transmitted light by intentional light irradiation,
a color core layer which is a colored layer as a whole and provided with the hidden pattern of a color different from the color of the layer at a predetermined position on at least one surface;
a first silver hiding layer which is a silver layer and is provided at a position covering at least the hidden pattern on one side of the color core layer on which the hidden pattern is formed;
a second silver hiding layer, which is a silver layer and is provided on the other surface of the color core layer at least at a position corresponding to the hidden pattern;
a first white hiding layer which is a white layer and which is provided on at least the first silver hiding layer;
a second white hiding layer which is a white layer and which is provided on at least the second silver hiding layer;
a protective layer provided entirely as the outermost layer on the side on which the hidden pattern is formed and having a visible surface layer pattern formed integrally with the hidden pattern at a predetermined position as an authenticity identification pattern;
has
The surface pattern and the hidden pattern form part of the authenticity identification pattern,
The authenticity identification pattern is a pattern obtained by the surface layer pattern and the hidden pattern,
A card for authenticity determination characterized by: A method for manufacturing a card for authenticity determination in which a hidden pattern that is invisible with a watermark is provided in the card, and the hidden pattern is visually recognized by transmitted light by intentional light irradiation,
forming the hidden pattern of a color different from the color of the color core layer at a predetermined position on at least one surface of the color core layer that is entirely colored;
A first silver hiding layer is formed on one side of the color core layer at a position covering at least the hidden pattern, and a second silver hiding layer is formed on the other side at least at a position corresponding to the hidden pattern. forming;
forming a white first white hiding layer on at least the first silver hiding layer and forming a white second white hiding layer on at least the second silver hiding layer;
a step of forming a protective layer entirely as an outermost layer on the side on which the hidden pattern is formed;
a step of forming a visible surface layer pattern integrally with the hidden pattern at a predetermined position on the protective layer and serving as an authenticity identification pattern;
contains
The surface pattern and the hidden pattern form part of the authenticity identification pattern,
The authenticity identification pattern is a pattern obtained by the surface layer pattern and the hidden pattern,
A method of manufacturing an authentication card, characterized by :

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