JP7319882B2 - 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 core layer, which is a light-transmissive layer of a predetermined color and provided with the hidden pattern formed at a predetermined position on at least one surface from a pattern forming portion of a color different from the color of the layer; a first silver hiding layer provided at a position covering at least the hidden pattern on one side of the core layer on which the hidden pattern is formed; and a silver layer on the other side of the core layer. A second silver hiding layer provided at least at a position corresponding to the hidden pattern, a white layer, and a first white hiding layer provided at least on the first silver hiding layer, and a white layer and a second white hiding layer provided on at least the second silver hiding layer, wherein at least the first silver hiding layer and the first white hiding layer are provided with the hidden portion in the pattern forming portion of the core layer. It is configured such that a portion other than the pattern is removed and a perforated portion having a shape exposing the core layer 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. a step of providing a pattern forming portion in a color different from the color of the core layer for forming the hidden pattern at a predetermined position on at least one surface of a light-transmitting core layer of a predetermined color; and forming a silver-colored first silver hiding layer at a position covering at least the hidden pattern of the second surface, and forming a silver-colored second silver hiding layer at a position corresponding to at least the hidden pattern on the other side; 1 forming a white first white hiding layer on the silver hiding layer and forming a white second white hiding layer on at least the second silver hiding layer; and forming a perforated portion in the white masking layer to expose the core layer by removing the portion other than the hidden pattern in the pattern forming portion of the core layer together with the perforation.

According to the first aspect of the invention, a hidden pattern formed from a pattern forming portion having a color different from that of the layer is provided at a predetermined position on at least one surface of a light-transmitting core layer of a predetermined color, and the core layer has a color different from that of the layer. A first silver hiding layer and a second silver hiding layer are provided on one side and the other side of the layer at least at positions corresponding to the hidden pattern, and a white second silver hiding layer is provided on the first silver hiding layer and the second silver hiding layer. A first white hiding layer and a second white hiding layer are provided, and at least the first silver hiding layer and the first white hiding layer are exposed by removing portions other than the hidden pattern in the pattern forming portion of the core layer. By adopting a configuration in which shaped perforations are formed, the silver-colored first silver hiding layer and the second silver hiding layer make the hidden pattern invisible with watermarks, and intentionally transmitted light of light irradiation This allows visual recognition, makes counterfeiting difficult, and maintains high security.

According to the invention of claim 2, the pattern forming part for forming the hidden pattern at a predetermined position on at least one surface of the core layer of a predetermined color that is entirely light-transmitting is formed in a color different from the color of the core layer. Then, a first silver hiding layer is formed on one side of the core layer at a position covering at least the hidden pattern, and a second silver hiding layer is formed on the other side at a position corresponding to at least the hidden pattern. 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; In the white concealing layer, the hidden pattern is formed after lamination of each layer by removing the part other than the hidden pattern in the pattern forming part of the core layer together with the perforation to form the perforated part that exposes the core layer. Therefore, a desired hidden pattern can be variably formed, and a card for authenticity determination can be manufactured by a simple process, in which the hidden pattern is visually recognized by transmitted light by intentional light irradiation, which is invisible with a watermark. is possible.

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. 3 is an explanatory view of forming a perforated portion in FIG. 2; 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 plan view of an authentication card, FIG. 1(B) is a cross-sectional view of an authentication card, and FIG. 1(C) is a diagram showing the layer structure thereof. In FIGS. 1A to 1C, the card 11 for determining authenticity has a predetermined light transmissive color (white in this embodiment, but any color as long as a hidden pattern to be described later can be seen through light transmission). The core layer 12 is made mainly of white resin and has a thickness of 560 μm, for example, polyethylene terephthalate (PET), polyvinyl chloride (PVC), polyethylene terephthalate glycol (PET). -G), known opaque white resins such as polycarbonate (PC) are used. White PVC is used in this embodiment.

At a predetermined position on one surface of the core layer 12, a hidden pattern 13 is formed from a pattern forming portion 13B (described in FIG. 2) having a color (for example, black) different from the color of the core layer 12, for example, by ink. It is provided with a thickness of 2 μm or less by printing. The hidden pattern 13 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 core layer 12 .

On the surface of the core layer 12 on which the hidden pattern 13 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 13. For example, it is provided with a thickness of 2 μm. Here, the entire surface of the core layer 12 is provided so as to cover the hidden pattern 13, but the region of the hidden pattern 13 may be covered to expose other portions of the core layer 12. (The same applies to the second silver hiding layer 14B, which will be described later).

The first silver hiding layer 14A is formed with a perforated portion 13A having a shape that exposes the core layer 12 by removing portions other than the hidden pattern 13 in the later-described pattern forming portion 13B of the core layer 12 .

On the other hand, on the other surface of the core layer 12, at least at a position corresponding to the hidden pattern 13, a second silver hiding layer 14B of the same type as described above is provided with a thickness of 2 μm. Here, it is provided on the entire surface of the other surface of the 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. The first white concealing layer 15A is formed with a perforated portion 13A having a shape that exposes the core layer 12 by removing portions other than the hidden pattern 13 in the later-described pattern forming portion 13B of the core layer 12 . The perforated portions 13A formed on the first white hiding layer 15A are formed in the same pattern and at the same position in the layer direction as the perforated portions 13A of 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.

For example, a transparent 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. 16B is provided with a thickness of, for example, 100 μm. 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.

The first protective layer 16A is formed with a perforated portion 13A having a shape that exposes the core layer 12 by removing portions other than the hidden pattern 13 in the later-described pattern forming portion 13B of the core layer 12 . The perforated portions 13A formed on the first protective layer 16A are formed at the same positions in the layer direction in the same pattern as the perforated portions 13A of the first silver hiding layer 14A and the perforated portions 13A of the first white hiding layer 15A. be done. Although the perforated portion 13A is also formed in the first protective layer 16A, the perforated portion 13A may be formed only on the first silver hiding layer 14A and the first white hiding layer 15A.

Portions other than the hidden pattern 13 in the later-described pattern forming portion 13B of the core layer 12 are removed by the perforations 13A, and the core layer 12 is exposed. It becomes a shape that does not match semantically.

Next, FIG. 2 shows a process chart for manufacturing the authentication card shown in FIG. 1, and 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. 2A, a pattern forming portion 13B having a color (black) different from that of the core layer 12 is formed at a predetermined position on one side of the white core layer 12 by, for example, printing. be done. The pattern forming portion 13B is, for example, a solid pattern and is formed with an area capable of forming the hidden pattern 13. As shown in FIG.

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 pattern forming portion 13B on one side of the core layer 12 by printing with silver ink. At the same time, as shown in FIG. 2(C), silver ink is applied to the entire surface of the core layer 12 including the positions corresponding to the pattern forming portions 13B on the other surface, similarly to the first silver concealing 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. 2(H), according to the position of the pattern forming portion 13B formed on the core layer 12 of the first protective layer 16A, a laser beam 20 is irradiated by, for example, a laser processing apparatus to The portions other than the hidden pattern 13 in the pattern forming portion 13B are sequentially removed via the first protective layer 16A, the first white hiding layer 15A, and the first silver hiding layer 14A, and the pattern forming portion 13B is covered with A hidden pattern 13 is formed on the core layer 12 by removing so as to leave only the hidden pattern 13 .

Specifically, as shown in FIG. 3A, the pattern forming portion 13B on the core layer 12 shown in FIG. By irradiating the light 20, the portions other than the portion to be the hidden pattern 13 later are removed as shown in FIGS. 3(C) to 3(E). In the drawing, the portion removed by the pattern forming portion 13B is satin-finished to form the pattern-removed portion 13C, but the surface of the core layer 12 appears visually.

Then, after performing laser processing to leave the hidden pattern 13 on the pattern forming portion 13B, as shown in FIG. is displayed and visually observed.

It should be noted that a portion unrelated to the hidden pattern 13 may be laser-processed in a different color to expose the processed portion of the core layer 12 to form a desired character, symbol, figure, or the like. Moreover, although the pattern forming portion 13B is formed in a solid pattern, it may be formed in a pattern such as a mesh that can form the shape of the hidden pattern 13 (characters, figures, etc.).

Next, FIG. 4 shows an explanatory diagram of authenticity determination of the card for authenticity determination of FIG. In the card 11 for determining authenticity shown in FIG. 1, the hidden pattern 13 is invisible when exposed to normal external light due to the first silver hiding layer 14A and the second silver hiding layer 14B (FIG. 4 ( B) See the upper part), the perforated portion 13A and the surface of the core layer 12 exposed by the perforated portion 13A are visible.

Therefore, as shown in FIG. 4A, an irradiation light 21A is intentionally 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 13 is formed on the core layer 12). The card 11 for authenticity determination is visually observed from the front side thereof. The irradiation intensity in this case is based on, for example, the intensity of illumination light provided in a smart phone.

By the irradiation light 21, as shown in the lower part of FIG. 4(B), the hidden pattern 13 appears due to the transmitted light and can be visually recognized. In this case, a combination of the hidden pattern 13 and the perforated portion 13A (the white portion of the exposed portion of the core layer 12) is visible.

That is, in such an authentication card 11, the silver-colored first silver hiding layer 14A and the second silver hiding layer 14B make the hidden pattern 13 invisible with a normal watermark, and intentionally transmit light irradiation. It can be visually recognized by light, is difficult to forge, and can maintain high security.

In addition, since the hidden pattern 13 is formed after lamination of each layer, the desired hidden pattern 13 can be variably formed by a simple process. It is possible to manufacture the authenticity determination card 11 that visually recognizes the For example, a pattern forming portion 13B for forming the hidden pattern 13 is formed, and a large number of original cards are manufactured by laminating each layer, and a variable hidden pattern 13 is produced according to the request of the card user group or the like. It is possible.

Next, FIG. 5 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. 5 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 white 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. Then, the coating material as the first protective layer 17A is perforated by laser processing to remove the portion other than the hidden pattern 13 from the pattern forming portion 13B on the core layer 12 to form the perforated portion 13D. It is what was done.

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. It is possible to make the entire card thinner by

Next, FIG. 6 shows a cross-sectional configuration diagram of another embodiment of the authentication card according to the present invention. FIG. 6A shows another embodiment of the authentication card 11 shown in FIG. 1, and FIG. 6B shows another embodiment of the authentication card 11 shown in FIG.

1 and 5, the hidden pattern 13 is formed on one surface of the core layer 12. However, in the authentication card 11 shown in FIG. A different or the same hidden pattern 13-1 is formed at a predetermined position on the other surface of the core layer 12 from the pattern forming part, and the second protective layer 16B and the second white concealing layer are formed according to the hidden pattern 13-1. Perforations 13D-1 are formed in the layer 15B and the second silver hiding layer 14B (the second white hiding layer 15B and the second silver hiding layer 14B may be used alone).

In addition, in the card 11 for determining authenticity shown in FIG. 6B, another or the same hidden pattern 13-1 is formed at a predetermined position on the other surface of the core layer 12 by the pattern forming unit. Perforated portions 13D- are formed in the second protective layer 17B, the second white concealing layer 15B, and the second silver concealing layer 14B (the second white concealing layer 15B and the second silver concealing layer 14B may be used only) according to the hidden pattern 13-1. 1 was formed.

That is, the authenticity determination card 11 shown in FIGS. 6A and 6B allows visual recognition of any of the hidden patterns 13 and 13-1 by intentional light irradiation from either side of the card. It is.

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 Core layer 13, 13-1 Hidden pattern 13A, 13A-1 Perforation part 13B Pattern formation part 13C Pattern removal part 13D, 13D-1 Perforation part 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 core layer, which is a light-transmissive layer of a predetermined color and provided with the hidden pattern formed at a predetermined position on at least one surface from a pattern forming portion of a color different from the color of the layer;
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 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 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;
has
At least the first silver hiding layer and the first white hiding layer are formed with perforations having a shape that exposes the core layer by removing a portion other than the hidden pattern in the pattern forming portion of the core layer. ,
the outline of the perforated portion and the outline of the hidden pattern partially match;
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,
a step of providing a pattern forming portion for forming the hidden pattern at a predetermined position on at least one surface of a core layer of a predetermined color, which is entirely light-transmitting, in a color different from the color of the core layer;
A first silver hiding layer is formed on one side of the 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. and
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 perforations in at least the first silver hiding layer and the first white hiding layer to expose the core layer by removing, together with the perforations, portions other than the hidden pattern in the pattern forming portion of the core layer; ,
including
the outline of the perforated portion and the outline of the hidden pattern partially match;
A method of manufacturing an authentication card, characterized by :

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