JP2873793B2 - Plastic card and manufacturing method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to cash cards for banks, various credit cards, various prepaid cards, medical cards, and ID (identification) cards. The present invention relates to the manufacturing method.

[0002]

2. Description of the Related Art Conventionally, plastic cards are IDs in the field of credit transactions represented by bank cards for banks.
It is widespread as a (identification) card or a prepaid magnetic card in the fields of transportation, communication, entertainment and the like. Particularly in the case of an ID card, a magnetic stripe card in which a magnetic stripe is provided on the surface of a card base is widely used.

The card base of the magnetic stripe card is usually made of a laminate of hard vinyl chloride. Specifically, a transparent hard vinyl chloride sheet having a thickness of 0.1 mm, called an oversheet, and a magnetic layer having a magnetic layer formed on the surface in advance. It is obtained by sandwiching a striped oversheet and a 0.5 mm thick white hard vinyl chloride sheet called a center core printed on one or both sides with a mirror-finished metal plate, heat-pressing and laminating.

On the other hand, a magnetic card usually has a thickness of 0.10 to
It is obtained by applying a magnetic paint on a plastic substrate such as polyethylene terephthalate of about 0.25 mm.

[0005]

As a method of presenting the above-mentioned indication of the frequency of use of the magnetic card, a method of perforating a card base has been widely used. However, in a plastic card represented by a magnetic stripe card, the total thickness of the card base is 0.76 mm, which is three times the thickness of a magnetic card. Has not been presented.

[0006] Therefore, it is not possible to prevent fraudulent acts such as transferring or buying or selling a used plastic card typified by a conventional magnetic stripe card as being unused, so that a prepayment requiring presentation of a standard of the number of uses is required. Not used in the field of formula cards.

[0007] In view of the above, an object of the present invention is to provide a plastic card having a function of presenting an indication of the number of uses required in the field of a prepaid card and a method of manufacturing the same.

[0008]

According to the present invention, there is provided a plastic card comprising a laminate in which a core sheet made of milky white hard vinyl chloride and an oversheet made of transparent hard vinyl chloride are laminated. A heat-sensitive layer, a decoloring layer, and a separation layer made of a fluid separating the heat-sensitive layer and the decoloring layer, the heat-sensitive layer being at least a colorless leuco dye as an electron donor. , A color developer containing an acidic substance that is an electron acceptor, and a heat-sensitive layer binder that binds the color former and the color developer.
And a decoloring agent containing at least one of an alkaline substance and a decoloring layer binder for binding the decoloring agent. Here, in the present invention, the opaque thermoplastic material is preferably made of milky white hard vinyl chloride, and the transparent thermoplastic material is preferably made of transparent hard vinyl chloride. In the plastic card of the present invention, it is preferable that the fluid of the separation layer is air.

Further, according to the present invention, the first oversheet is brought into contact with the other surface of the first core sheet made of a thermoplastic material having a decoloring layer on a part of one surface, and the first oversheet is brought into contact with a part of one surface. A second oversheet made of a thermoplastic material having a thermosensitive layer at a position corresponding to the decoloring layer and the first core sheet are opposed to each other via a second core sheet, and The decoloring layer and the thermosensitive layer are separated and adhered by a core sheet separating means, sandwiched between a pair of metal plates, and heated and pressed to form a separation layer between the decoloring layer and the thermosensitive layer. Thus, a method for producing a plastic card is obtained.

Here, in the method for manufacturing a plastic card according to the present invention, it is preferable that each of the decoloring layer and the heat-sensitive layer is plural.

In the method for manufacturing a plastic card according to the present invention, it is preferable that the plurality of heat-sensitive layers exhibit at least two different colors.

Further, in the method for producing a plastic card according to any one of the above aspects of the present invention, the separating means includes:
Preferably, the second core sheet includes a through hole provided in the second core sheet and air sealed in the through hole.

[0013] In the method for manufacturing a plastic card according to any one of the above aspects of the present invention, the first core sheet may include a decoloring agent containing an oil, a plasticizer, and an alkali substance, and may bind the decoloring agent. It is preferably made of milky white hard vinyl chloride on which a decoloring layer made of a decoloring layer binder is printed.

Further, in the method for manufacturing a plastic card according to any one of the above aspects of the present invention, the first oversheet may include a color former containing a colorless leuco dye as an electron donor, and an acidic substance as an electron acceptor. And a heat-sensitive layer that binds them. The heat-sensitive layer is preferably made of transparent hard vinyl chloride.

In the method for manufacturing a plastic card according to any one of the above aspects of the present invention, it is preferable that the second core sheet is made of milky white hard vinyl chloride.

In the method for manufacturing a plastic card according to any one of the above aspects of the present invention, the first core sheet and the second core sheet, or the second core sheet and the second oversheet, An adhesive is applied to the four sides of one of the sheets to be bonded, and the two sides are adhered and laminated to form a laminate, and the above-mentioned heat-pressing is performed to form a plastic card base, and the plastic card base is bonded to the four sides. It is preferable to perform punching so as to remove.

Further, the present invention will be specifically described.

In the field of thermosensitive coloring, a system in which a colorless leuco dye (electron donor), which is an electron donor, undergoes a chemical reaction with an acidic substance (a color developer), which is an electron acceptor, to form a color has been widely used. Is what it is.

It is widely known that a reversible reaction occurs when a colored leuco dye (color forming agent) comes into contact with a fat or oil or / and a plasticizer or / and an alkali substance, and the color disappears.

In the present invention, a color former containing a colorless leuco dye as an electron donor, a color developer containing an acidic substance as an electron acceptor, and a heat-sensitive layer are provided between the core sheet and the oversheet of the plastic card. A heat-sensitive layer made of an agent and a decoloring layer made of a decoloring agent containing at least one of oils, fats, plasticizers and alkaline substances and a decoloring layer binder are provided via a separating layer made of a fluid.

In the present invention, the heat-sensitive layer is colored in advance in the heat-pressing step of the plastic card laminate in the plastic card manufacturing process, and when necessary, the separation layer is broken by, for example, a heating plunger mechanism. By contacting the color-developed heat-sensitive layer with the above-mentioned decolorizable layer and decoloring, it is possible to correspond to unused or used. Further, by providing a plurality of the above-mentioned separation layers, it is possible to correspond to the frequency of use.

That is, in the present invention, the color is developed by melting a developer consisting of an acidic substance, which is an electron acceptor, in the thermosensitive layer in the thermocompression bonding step in the plastic card manufacturing process, and supplying the electron in the thermosensitive layer. It is carried out by causing a chemical reaction with a color former consisting of a colorless leuco dye as a body.

At this time, the separation layer is bonded between the oversheet and the core sheet forming the plastic card laminate through an adhesive, so that an appropriate fluid is sealed between the oversheet and the core sheet. The fluid is formed by concentrating the fluid in a through hole provided in the core sheet. Therefore, since the separation layer separates the heat-sensitive layer and the decoloring layer which are opposed to each other through the through hole, they do not come into contact with each other and no decoloration reaction occurs.

The decoloring is performed, for example, by releasing the fluid in the separation layer with a heating plunger and bringing the thermosensitive layer and the decoloring layer into contact with each other, while the fats and oils and / or plasticizers and / or This is carried out by heating the decoloring agent, which is an alkaline substance, so as to react with the colored leuco dye.

The leuco dye which can be used in the present invention may be a triphenylmethanephthalide compound, a phenothiazine compound, a spiropyran compound, a rhodamine lactam compound, a leucoramine compound, a fluoran compound or the like, and preferably fluoran compound. Any compound can be used as long as it is a system compound.

As the color developer, use may be made of inorganic acids such as kaolin and zeolite, aromatic carboxylic acids and their anhydrides or metal salts, organic sulfonic acids, other organic acids, and phenolic compounds. it can.

The binder for the heat-sensitive layer is to disperse the leuco dye and the developer in the heat-sensitive layer in the form of dispersed particles, and at the same time, to provide an adhesive between the oversheet made of transparent hard vinyl chloride and the heat-sensitive layer. Any material can be used as long as it imparts the following properties: acrylic resins, cyclized rubbers, terpene resins, petroleum resins, and many others.

Furthermore, many inks are commercially available as inks in which these color formers, developers, binders and the like are mixed and dispersed. For example, Fuji Photo Film Co., Fuji Black, Dainichi Seika Kogyo Co., Ltd., Dithermo DI90 Black, N
N-102 manufactured by CR Co., Ltd. and the like.

The fats and oils used in the present invention include palmitic acid, lauric acid, stearic acid, oleic acid,
It is sufficient that linoleic acid, linolenic acid, erucic acid, and ricinoleic acid are the main components, and specific vegetable oils include rapeseed oil and cottonseed oil.

The plasticizer may be a plasticizer that gives flexibility to the resin, and may be a phthalate ester plasticizer, a phosphate ester plasticizer, a fatty acid plasticizer, a polymer plasticizer, or the like. Examples include dioctyl phthalate and dibutyl phthalate.

As the alkaline substance, a sodium compound, a potassium compound, a magnesium compound and the like can be used, and preferably, sodium hydroxide, potassium hydroxide,
Magnesium hydroxide.

As the decolorizing layer binder, a core sheet made of milky white hard vinyl chloride is used as well as one in which fats and oils and / or plasticizers and / or alkali substances are present in dispersed particles in the decoloring layer. Any substance can be used as long as it imparts adhesiveness to the decoloring layer, and examples thereof include a vinyl chloride-vinyl acetate copolymer and a vinyl chloride-vinyl acetate-vinyl alcohol copolymer.

More specifically, SREC A and SREC C manufactured by Sekisui Chemical Co., Ltd., VAGH and VYHH manufactured by UCC, MPR-TS, TSL, TSM, TS manufactured by Nissin Chemical Co., Ltd.
N, TS40 and the like.

[0034]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is an exploded perspective view showing an example of a laminated structure of a plastic card base formed by the method of manufacturing a plastic card according to the present invention. FIG. 2 is a view showing a cross section of the rigid vinyl chloride laminate before the thermal compression bonding in the manufacturing process of the plastic card of FIG. FIG. 3 is a view showing a cross section of the plastic card base and the plastic card after punching in the plastic card manufacturing process of FIG.

Referring to FIGS. 1 to 3, a core sheet made of a milky white hard vinyl chloride having a thickness of 0.28 mm and an oversheet made of a transparent hard vinyl chloride having a thickness of 0.10 mm used in the present embodiment have a length of 120 mm. , 90 mm wide and trimmed to prepare.

Next, a decoloring layer 2 is printed on the first core sheet 1 made of milky white hard vinyl chloride having a thickness of 0.28 mm using a decoloring ink shown in Table 1 below.

[0038]

[Table 1]

Next, the first core sheet 1 is overlaid so that the surface opposite to the surface on which the decoloring layer 2 is printed is in contact with the first oversheet 3 made of transparent hard vinyl chloride having a thickness of 0.10 mm.

Next, a through-hole 5 having a diameter of φ3 mm is formed in the second core sheet 4 made of milky white hard vinyl chloride having a thickness of 0.28 mm.

Next, an adhesive 6 is applied to the four sides of the first core sheet 1 on which the decoloring layer 2 is printed with a width of 10 mm from the end of the sheet, and the second core sheet 4 is laminated and adhered.

Next, a heat-sensitive layer 8 is printed on a second oversheet 7 made of transparent hard vinyl chloride having a thickness of 0.10 mm using a heat-sensitive ink shown in Table 2 below.

[0043]

[Table 2]

Next, the adhesive 6 is applied to the four sides of the second core sheet with a width of 10 mm from the sheet edge, and the surface on which the adhesive 6 is applied and the surface on which the heat-sensitive layer 8 of the second oversheet 7 is printed. And so that they face each other.

Next, the rigid vinyl chloride laminate 14 produced as described above was sandwiched between mirror-finished metal plates,
The plastic card substrate 10 was obtained by heating and pressing under a pressure of 25 kg / cm ² and a heating and pressing holding time of 20 minutes.

Next, as shown in FIG. 3, avoiding the range of 10 mm width from the four sides of the plastic card base,
According to IS standard, length: 85.60mm, width: 5
3.98 mm, corner: 3.10 mm, plastic card base was punched out with a punching machine, and plastic card 1
1 was obtained.

Next, the function of the plastic card according to the embodiment of the present invention prepared by the above method was confirmed in the following manner. In the plastic card according to the embodiment of the present invention, the colorless and transparent heat-sensitive layer 8 is colored black due to heat at the time of heating and pressing in the plastic card manufacturing process.

At this time, the decoloring layer 2 located at a position facing the heat-sensitive layer 8 is separated by the separation layer 9 made of air, and does not affect the heat-sensitive layer 8.

Next, as shown in FIG. 4, a heat plunger mechanism 12 having a diameter of φ3 mm having a sharp projection at the tip is used to apply a temperature of 100 ° C., a pressure of 5 kg / cm ² , and a black color on the heat-sensitive layer 8. 5 as shown by the white arrow 13
Heat and pressure bonding for 12 seconds, heat plunger mechanism 12
A hole is formed in the second oversheet 7 by the sharp protrusion of the second layer, and the air in the separation layer 9 is exhausted.
Is crushed by the heat plunger mechanism 12 and the heat-sensitive layer 8
Was pressed against the decoloring layer 2.

After that, the decolorizing agent of the decoloring layer 2 melted out by the heat of the heat plunger mechanism 12 is applied to the heat-sensitive layer 8.
The heat-sensitive layer 8 that has undergone a chemical reaction with the coloring agent in it and has developed a black color
Was changed to a colorless and transparent thermosensitive layer 8.

[0051]

As described above, according to the present invention, it is possible to obtain a plastic card having a function of presenting a measure of the number of times of use required in the field of a prepaid card and a method of manufacturing the same.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an example of a laminated structure of a plastic card base formed by a plastic card manufacturing method according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a laminated structure of a rigid vinyl chloride laminate before heat compression bonding in a plastic card manufacturing process according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of a plastic card base and a plastic card at the time of punching out a card in a plastic card manufacturing process according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a plastic card according to the present invention and a method of presenting an indication of a use frequency.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st core sheet 2 Decoloring layer 3 1st oversheet 4 2nd core sheet 5 Through hole 6 Adhesive 7 2nd oversheet 8 Heat sensitive layer 9 Separation layer 10 Plastic card base 11 Plastic card 12 Heat plan Jar mechanism 14 Hard vinyl chloride laminate

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Ginya Ishiguro Nippon Telegraph and Telephone Corporation, 1-6-1, Uchisaiwaicho, Chiyoda-ku, Tokyo (56) References JP-A-8-25808 (JP, A) (58) ) Field surveyed (Int. Cl. ⁶ , DB name) B42D 15/10 501 B41M 5/26

Claims (11)

(57) [Claims] 1. A plastic card comprising a laminate in which a core sheet made of an opaque thermoplastic material and an oversheet made of a transparent thermoplastic material are laminated, wherein a heat-sensitive material is provided between the core sheet and the oversheet. A color-developing agent containing a colorless leuco dye, which is at least an electron donor, and an electron acceptor. And a heat-sensitive layer binder for binding the color former and the color developer. The decoloring layer comprises at least one of oils, fats, plasticizers, and alkali substances. What is claimed is: 1. A plastic card comprising: a decoloring agent containing the decoloring agent; and a decolorizing layer binder for binding the decoloring agent. 2. The plastic card according to claim 1, wherein said opaque thermoplastic material is made of milky white hard vinyl chloride, and said transparent thermoplastic material is made of transparent hard vinyl chloride. 3. The plastic card according to claim 1, wherein the fluid of the separation layer is air. 4. A first core sheet made of a thermoplastic material having a decoloring layer on a part of one surface thereof is brought into contact with a first oversheet on the other surface of the first core sheet. A second oversheet made of a thermoplastic material having a heat-sensitive layer at a position where the second oversheet and the first core sheet are opposed to each other via a second core sheet, and separated by the second core sheet separating means. The plastic, wherein the decoloring layer and the thermosensitive layer are separated and adhered, sandwiched between a pair of metal plates, and heated and pressed to form a separation layer between the decoloring layer and the thermosensitive layer. Card manufacturing method. 5. The method for manufacturing a plastic card according to claim 4, wherein said decoloring layer and said heat-sensitive layer are each provided in a plurality. 6. The method for manufacturing a plastic card according to claim 5, wherein the plurality of heat-sensitive layers exhibit at least two different colors. 7. The method for manufacturing a plastic card according to claim 4, wherein said separating means includes a through hole provided in said second core sheet, and a sealing member sealed in said through hole. And a method for producing a plastic card, comprising: 8. The method for manufacturing a plastic card according to claim 4, wherein the first core sheet comprises a decoloring agent containing fats and oils, a plasticizer, and an alkali substance, and the decoloring agent. A method for producing a plastic card, comprising a milky white hard vinyl chloride on which a decoloring layer comprising a binder is printed. 9. The method for manufacturing a plastic card according to claim 4, wherein the first oversheet is a color former containing a colorless leuco dye as an electron donor, and an electron acceptor. A method for producing a plastic card, comprising: a transparent hard vinyl chloride on which a heat-sensitive layer comprising a color developer containing an acidic substance and a heat-sensitive layer binder for binding the same is printed. 10. The method of manufacturing a plastic card according to claim 4, wherein said second core sheet is made of milky white hard vinyl chloride. 11. The method for manufacturing a plastic card according to claim 4, wherein
Core sheet and the second core sheet, or the second core sheet
A core sheet and the second oversheet are coated with an adhesive on four sides of one of the sheets to be bonded and bonded to form a laminated body; A method of manufacturing a plastic card, comprising punching the plastic card base so as to remove the four sides to which the plastic card is attached.