JPH0437783B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to surface adhesives for cards, which are components of bank cash cards, credit cards, identification cards, etc., and methods of manufacturing them. This is about the cards used and how they were manufactured.

This type of identification card is required to be able to prevent forgery, theft, etc., and to be durable enough to maintain its functionality.

[Prior art] Regarding prevention of forgery and theft of certificate cards,
Cardholders are known to have the cardholder's signature or photograph attached, or to have a magnetic recording medium.

[Problems to be solved by the invention] However, since the cardholder's signature or face photo is easily visible from the outside, it is easy to determine authenticity, but it is also easy to forge or alter. However, the function to prevent card forgery and theft is not complete.

Furthermore, although cards equipped with magnetic recording media are relatively difficult to forge or alter, a magnetic recording reader is required to determine the authenticity of the card, which poses the problem of expensive equipment.

Therefore, the applicant of this application has created a display section on the card body that displays the necessary characters, designs, etc. to be certified using a liquid crystal that cannot be seen under normal conditions but can only be seen under specific conditions. We have developed an identification card in which at least the display part is covered with a transparent sheet, and have achieved remarkable results in providing an identification card that is highly resistant to forgery and falsification and is easy to implement. (Showa 58
(Refer to Utility Model Application Publication No. 6033, 2013) However, liquid crystals are biochemically active, and even when microencapsulated, when printed on a card with other inks, they react with other inks and become sensitive. It is difficult to manufacture cards because the temperature-sensitive coloring function may deteriorate, and for this reason, a liquid crystal card that is easy to manufacture and is sure to maintain the excellent temperature-sensitive coloring function of the liquid crystal, and a method for manufacturing the same. development is desired.

The present invention was made in view of the above circumstances, and includes a surface adhesive for cards and a surface adhesive for cards used in manufacturing cards that are easy to manufacture and easy to maintain temperature-sensitive coloring functions. The purpose of this invention is to provide cards using kimonos and methods for manufacturing them.

(B) Structure of the Invention [Means for Solving the Problem] In response to this object, the first invention, the surface adhesive for cards, consists of one side of a transparent or translucent film made of a thermoplastic biosynthetic resin. a primer layer formed on a required portion of the surface of the primer layer; a liquid crystal ink layer formed on the primer layer;
It is also characterized by comprising a black ink layer covering the primer layer and the liquid crystal ink layer from above the liquid crystal ink layer. In addition, the second invention, a method for producing a surface adhesive for cards, includes forming a primer layer by printing on a desired location on one surface of a transparent or translucent film made of a thermoplastic synthetic resin, and then A liquid crystal ink layer is formed on the layer by printing, and then a black ink layer covering the primer layer and the liquid crystal ink layer is formed by printing on the liquid crystal ink layer. Further, a card according to a third aspect of the present invention includes a primer layer formed on a predetermined portion of one surface of a transparent or translucent film made of a thermoplastic synthetic resin, and a primer layer formed on the primer layer. A card surface adhesive having the same size as the card core and comprising a liquid crystal ink layer and a black ink layer covering the primer layer and the liquid crystal ink layer from above the liquid crystal ink layer is attached to one of the card cores. It is characterized by being pasted onto the card core by heat fusion with the surface facing inside. Further, in the method for producing a card, which is the fourth invention, on the one hand, a primer layer is formed by printing on a desired location on one surface of a transparent or translucent film made of a thermoplastic synthetic resin, and then the primer layer is forming a liquid crystal ink layer thereon by printing, and then forming a black ink layer covering the primer layer and the liquid crystal ink layer from above the liquid crystal ink layer by printing to produce a card surface adhesive;
On the other hand, a card core with desired characters and designs printed on one surface is manufactured, and then the one surface of the card surface adhesive and the one surface of the card core are bonded by heat fusion. It is characterized by being pasted.

Hereinafter, details of these inventions will be explained with reference to the drawings showing one embodiment.

In FIG. 1, 1 is a card. card 1
is constructed by pasting an adhesive 3 on the surface of a card core 2 by heat fusion. The card 1 is made up of one set of such a combination of the card core 2 and the adhesive material 3, or two sets in which the other set shown by the chain line in FIG. 1 is pasted symmetrically.

Therefore, first, the adhesive material 3 will be explained.

The adhesive material 3 includes a base sheet 4, as shown in FIG. The base sheet 4 is made of transparent thermoplastic synthetic resin such as polyvinyl chloride or polypropylene. A primer layer 6 is formed at required locations on one surface 5 of the base sheet 4. This primer layer 6 is for improving the adhesion between the liquid crystal ink layer 7 and the base sheet 4, which will be described later. A liquid crystal ink layer 7 is formed on the primer layer 6 in a desired pattern. The liquid crystal ink constituting the liquid crystal ink layer 7 is an ink containing microcapsules of cholesteric liquid crystal. A black ink layer 8 is formed on the liquid crystal ink layer 7, covering the liquid crystal ink layer 7 and the primer layer 6. This black ink layer 8 completely absorbs the light that has passed through the liquid crystal ink layer 7, blocks the light that is confused with the reflection of the liquid crystal ink layer 7, and makes the appearance of the liquid crystal ink layer 7 clear. belongs to.

Next, a method for manufacturing the above-described adhesive 3 will be explained.

Although various methods can be considered for producing the adhesive having the above structure, the following method is the best. That is, as shown in Figure 3, first,
A primer layer 6 is formed at required locations on one surface 5 of the base sheet 4 by printing (FIG. 3a),
This is dried, and then a liquid crystal ink layer 7 is formed on the primer layer 6 by printing (FIG. 3b).
Then, a black ink layer 8 covering the primer layer 6 is formed by printing and dried to complete the adhesive 3 (FIG. 3c).

Next, the structure of the card 1 using the above adhesive material 3 will be explained.

As shown in FIG. 4, card 1 has card core 2.
It is constructed by pasting the adhesive 3 on one surface 13 of the body by heat fusion. One surface 13 of card core 2
A printing layer 14 is formed using ordinary ink. In the adhesive material 3, one surface 5 on which the liquid crystal ink layer 7 is formed is one surface 13 of the card core 2.
It is attached. As a result, the printed layer 14,
Liquid crystal ink layer 7 includes card core 2 and base sheet 4
It will be located between. Such a combination of card core 2 and adhesive material 3 may be one set, but as described above, two sets of card cores 2 may be used by pasting them together.

Next, a method of manufacturing this card 1 will be explained. As shown in FIG. 5, first, the adhesive 3 is manufactured. This manufacturing method is as described above. On the other hand, the card core 2 is manufactured. A printing layer 14 is formed on one surface 13 of the card core 2 by printing with ordinary ink. Next, the card core 2 prepared in this manner and the adhesive material 3 are adhered to each other using one surface 5 and 13 of each.
This adhesion is performed by heat-sealing the card core 2 and base sheet 4.

(c) Functions and Effects of the Invention The card surface adhesive configured as described above is used by being attached to a card base material such as a card core, but the liquid crystal ink layer 7 is a thin base sheet. 4, the liquid crystal ink layer will not be damaged even if it is touched by hand or comes into contact with an inspection machine, and its good coloring function will remain unimpaired for a long period of time. . Moreover, since the heat from hands and the inspection machine is transmitted to the liquid crystal ink layer 7 through the thin base sheet 4, the reaction of the liquid crystal ink layer 7 is extremely rapid. Further, the surface of the liquid crystal ink layer 7 is the side to be bonded to the card base material, but since this surface is covered with the black ink layer 8, the liquid crystal ink layer 7
The coloration becomes extremely clear, and the black ink layer 8 blocks direct contact between the liquid crystal ink layer 7 and the card base material or adhesive. It is not affected by the material or adhesive material, and the range of material selection can be widened.

In addition, in the method for manufacturing adhesives of the present invention, the primer layer, liquid crystal ink layer, and black ink layer are all printed, so established and stable technology can be used, so products can be manufactured quickly and at low cost. can do.

Further, the card and the manufacturing method thereof of the present invention are configured such that the card core and the adhesive material, which are manufactured separately, are adhered together by heat fusion. Like conventional liquid crystal display cards, a printed layer of characters and designs using normal ink and a printed layer of characters and designs using liquid crystal ink are formed on the card core.
When a card is constructed by covering a transparent cover sheet (corresponding to the base sheet 4 in the present invention) thereon, the ink that forms the printing layer of normal ink or the dampening water used in offset printing, for example, It acts on the microcapsules of the liquid crystal and reduces the coloring function of the liquid crystal, but in the card of this invention, a printing layer made of normal ink is provided on the card core, and a liquid crystal ink layer is provided on the base sheet of the adhesive. Since they are formed separately and attached after completely drying, the coloring function of the liquid crystal as described above is not impaired. Furthermore, since the adhesive and the card core are manufactured separately, even if a defect such as a printing error occurs in either one, the entire card will not be wasted. Moreover, since the adhesive material and the card core are made of thermoplastic material and are attached by heat fusion, the adhesive surfaces of both soften due to heating during heat fusion, so the liquid crystal The capsule is not crushed by being pushed, and good coloring function is maintained.

[Brief explanation of drawings]

Fig. 1 is an explanatory cross-sectional view of the card, Fig. 2 is an explanatory cross-sectional view of the surface adhesive, Fig. 3 is an explanatory view showing the manufacturing process of the surface adhesive, and Fig. 4 is an enlarged cross-sectional explanatory view of the card. FIG. 5 is an explanatory diagram showing the manufacturing process of the card. 1... Card, 2... Card core, 3... Adhesive, 4... Base sheet, 6... Primer layer,
7...Liquid crystal ink layer, 8...Black ink layer.

Claims (1)

[Scope of Claims] 1. A primer layer formed on a predetermined portion of one surface of a transparent or translucent film made of a thermoplastic synthetic resin, and a liquid crystal ink layer formed on the primer layer. , and a black ink layer covering the primer layer and the liquid crystal ink layer from above the liquid crystal ink layer. 2. A primer layer is formed by printing on a required location on one surface of a transparent or translucent film made of a thermoplastic synthetic resin, and then a liquid crystal ink layer is formed by printing on the primer layer, and then the 1. A method for producing a surface adhesive for a card, comprising forming a black ink layer covering the primer layer and the liquid crystal ink layer from above the liquid crystal ink layer by printing. 3. A primer layer formed on a required part of one surface of a transparent or translucent film made of thermoplastic synthetic resin, a liquid crystal ink layer formed on the primer layer, and the liquid crystal ink layer. A card surface adhesive having the same size as the card core and comprising a black ink layer covering the primer layer and the liquid crystal ink layer from above is heated on the card core with the one surface inside. A card characterized by being attached by fusion. 4. On the other hand, a primer layer is formed by printing on a required location on one surface of a transparent or translucent film made of a thermoplastic synthetic resin, and then a liquid crystal ink layer is formed by printing on the primer layer, Next, a black ink layer covering the primer layer and the liquid crystal ink layer is formed on the liquid crystal ink layer by printing to produce a card surface adhesive;
On the other hand, a card core with desired characters and designs printed on one surface is manufactured, and then the one surface of the card surface adhesive and the one surface of the card core are bonded by heat fusion. A method for manufacturing a card, which is characterized by pasting.