JP2873797B2 - 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 a plastic card which is suitable for a bank cash card, various credit cards, various prepaid cards, medical cards, ID (identification) cards, and which can present an indication of the frequency of use. It relates to a 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.
(For identification) or as 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 in this magnetic stripe card is usually made of a laminate of hard vinyl chloride. Specifically, a transparent hard vinyl chloride sheet having a thickness of about 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.

[0004]

As a method of presenting a guide of the number of times of use of the magnetic card, a method of perforating a card base is 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.

[0005] As a method of presenting an indication of the frequency of use of the magnetic card, a method of forming a heat-sensitive coloring layer using a heat-sensitive paint on a card base and coloring by heating is also used.

However, the heat-sensitive coloring layer has a problem in that the coloring portion is faded or erased by a chemical or the like. Therefore, various technical improvements have been studied, but the problem has not been solved. .

[0007] This problem also applies to the plastic card. As a solution to this problem, a structure in which a thermosensitive coloring layer is provided inside the card base is effective. However, it is technically difficult to develop a color due to high heat at the time of thermocompression bonding during a plastic card manufacturing process. Therefore, a plastic card typified by a conventional magnetic stripe card cannot prevent fraudulent acts such as transferring or buying and selling a used card falsely as an unused card. Not used in the field.

Accordingly, a technical problem of the present invention is to provide a heat-sensitive coloring layer having a function of presenting an indication of the number of times of use required in the field of a prepaid card, and having a coloring portion that does not fade or lose color due to chemicals or the like. An object of the present invention is to provide a plastic card having the same and a manufacturing method thereof.

[0009]

According to the present invention, there is provided a core sheet comprising an opaque first thermoplastic resin and a transparent second sheet.
A plastic card comprising a laminate of oversheets made of a thermoplastic resin, comprising a color former formed of a color former and a color former binder, and a color developer and a developer binder produced by contacting the color former to form a color. A plastic card is provided, comprising: a color developing layer; and a separation layer provided between the core sheet and the oversheet and made of a fluid separating the color developing layer and the color developing layer.

Here, in the plastic card of the present invention, it is preferable that the color former contains at least a colorless leuco dye as an electron donor, and the developer contains an acidic substance as an electron acceptor.

Further, in the plastic card of the present invention, it is preferable that the first thermoplastic resin is made of milky white hard vinyl chloride, and the second thermoplastic resin is made of transparent hard vinyl chloride.

Further, in the plastic card of the present invention, it is preferable that the fluid of the separation layer is air.

According to the present invention, a first core sheet made of an opaque first thermoplastic resin on which a color developing layer composed of a color developing agent and a color developing layer binder is printed, is provided. The first and second oversheets made of a transparent second thermoplastic resin are overlapped so that the surface opposite to the printed surface is in contact with the first oversheet.
An adhesive is applied to four sides of the surface of the core sheet on which the color-developed layer is printed, and a second core sheet made of an opaque first thermoplastic resin having a through hole in advance is laminated and adhered. An adhesive is applied to the four sides of the second core sheet, and a color forming layer made of a color forming agent and a color forming layer binder, which forms a color in contact with the color developing agent, is printed on the second core sheet. The plastic card laminate obtained by laminating and bonding the oversheet of No. 2 so that the surface on which the color-forming layer is printed faces the color-developing layer is sandwiched between mirror-surface metal plates, and then heated and pressed to form the core sheet and the core sheet. A method for producing a plastic card is provided, wherein the color-forming layer, the color-developing layer, and a separation layer made of a fluid separating the color-forming layer and the color-developing layer are formed between the oversheet. .

Here, in the method for producing a plastic card according to the present invention, like the plastic card, the color former contains at least a colorless leuco dye as an electron donor, and the developer contains an electron acceptor. Preferably, the first thermoplastic resin comprises milky white rigid vinyl chloride, and the second thermoplastic resin comprises transparent hard vinyl chloride. Preferably, the fluid of the separation layer comprises air.

The leuco dyes usable in the present invention include:
A triphenylmethanephthalide-based compound, a phenothiazine-based compound, a spiropyran-based compound, a rhodamine lactam-based compound, a leucoramine-based compound, a fluoran-based compound, or the like may be used, and a fluoran-based compound is preferable.

The color developing agents usable in the present invention include inorganic acids such as kaolin and zeolite on acidic white, aromatic carboxylic acids and their anhydrides or metal salts, organic sulfonic acids, other organic acids, and phenol. Compounds and the like can be used.

The binder for the color-forming layer which can be used in the present invention is one which causes the leuco dye to be present in the form of dispersed particles in the color-forming layer and, at the same time, has an adhesive property with transparent hard vinyl chloride or milky white hard vinyl chloride. Any substance can be used as long as it is to be imparted, and many things such as acrylic resin, cyclized rubber, terpene resin, petroleum resin and the like can be used.

Further, as the developing layer binder of the present invention,
Any material can be used as long as it allows the developer to be present in the developer layer in the form of dispersed particles and at the same time imparts adhesion to transparent hard vinyl chloride or milky white hard vinyl chloride. Acrylic resin, cyclized rubber , Terpene resin, petroleum resin and many others can be used.

[0019]

[Function] In the field of thermosensitive coloring, a method in which a colorless leuco dye (electron donor) causes a chemical reaction with an acidic substance (developing agent) as an electron acceptor to form a color has been widely used. I have. In addition, colored leuco dye (color former)
It is widely known that when a substance comes into contact with fats and oils and / or a plasticizer or / and an alkali substance, a reversible reaction occurs and the color disappears.

According to the present invention, a color-forming layer comprising a color former containing a colorless leuco dye as an electron donor and a binder 1, and an acidic substance as an electron acceptor are provided between a core sheet and an oversheet of a plastic card. And a developer layer comprising a developer and a binder for the developer layer are provided via a separation layer made of a fluid.

In the present invention, the above-described color-forming layer is colored when needed, so that it can be used unused or used. Furthermore, by providing a plurality of the separation layers,
It is also possible to correspond to the frequency of use. At this time, the color is formed by, for example, destroying the separation layer by a heating plunger mechanism, heating the color-developing layer and the color-developing layer in contact with each other, and forming an acidic substance as an electron acceptor in the color-developing layer. This is carried out by melting a color developer and causing a chemical reaction with a color former consisting of a colorless leuco dye as an electron donor in the color-forming layer.

The separation layer is bonded to 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. This fluid is formed by concentrating the fluid in the through hole provided in the core sheet.

Therefore, the separation layer separates the color-forming layer and the color-developing layer which are opposed to each other through the through-hole, so that they do not come into contact with each other.

[0024]

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

FIG. 1 is a view showing a laminated structure of a plastic card base formed by a method of manufacturing a plastic card according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the rigid vinyl chloride laminate before the heat compression bonding in the plastic card manufacturing process according to the manufacturing method of the present invention in FIG. Also, FIG.
FIG. 2 is a cross-sectional view of the plastic card base and the plastic card after punching in a plastic card manufacturing process according to the manufacturing method of the present invention in FIG. Referring to FIGS. 1 to 3, first, a first core sheet 1 made of a milky white hard vinyl chloride having a thickness of 0.28 mm and a first core sheet made of a transparent hard vinyl chloride having a thickness of 0.10 mm used in the present embodiment. Of the oversheet 2 having a length of 120 mm and a width of 90 mm.

Next, a developing layer 3 is printed on the first core sheet 1 made of milky white hard vinyl chloride having a thickness of 0.28 mm using a developing ink shown in Table 1 below.

[0027]

[Table 1]

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

Next, a through hole 5 having a diameter of 3 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 6a is applied to the four sides of the first core sheet 1 on which the color developing layer 3 is printed with a width of 10 mm from the sheet edge, and the second core sheet 4 is stacked. Glue.

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

[0032]

[Table 2]

Next, an adhesive 6 is applied to the four sides of the second core sheet 4 with a width of 10 mm from the end of the sheet, and the surface on which the adhesive 6b is applied and the coloring layer 8 of the second oversheet 7 are applied. Is adhered so that the surface on which is printed faces.

Next, the plastic card laminate produced as described above was sandwiched between mirror-finished metal plates,
Heat and pressure were applied at a pressure of 25 kg / cm ² and a heating / pressing holding time of 20 minutes to obtain a plastic card substrate 10 shown in FIG.

Next, as shown in FIG. 3, avoiding the range of 10 mm width from the four sides of the plastic card base,
According to the S standard, length: 85.60 mm, width: 53.
The plastic card base 10 was punched out with a punching machine at 98 mm, corner: 3.10 mm to obtain a plastic card 11 shown in FIG.

FIGS. 4 and 5 are views for explaining the method of using the plastic card described with reference to FIGS. The function of the plastic card according to the embodiment of the present invention created by the above method was confirmed in the following manner. First, by visual inspection, the plastic card according to the embodiment of the present invention is placed between the first core sheet 1 and the second oversheet 7 at a position where the coloring layer 8 and the developing layer 3 face each other. Yes, it was separated by the separation layer 9 made of air, and it was confirmed that this coloring layer 8 did not develop color.

Next, as shown in FIG. 4, a heat plunger mechanism A21 having a diameter of 3 mm and having a sharp projection at the tip is used.
g / cm ² for 5 seconds, the second oversheet 7 was pierced by the sharp projections of the first heat plunger mechanism 21, and the air in the separation layer 9 ′ was exhausted. The separation layer 9 ′ was crushed by the first heat plunger mechanism 21, and the coloring layer 6 was pressed against the developing layer 3. Then, the first heat plunger mechanism 1
It was confirmed that the developer of the color developing layer 3 was melted by the heat of 0, and the melted color developer caused a chemical reaction with the color forming agent in the color forming layer 8 to change the color of the color forming layer 8 to black.

Next, as shown in FIG. 5, a second heat plunger mechanism 22 having a smooth tip and a diameter of φ3 mm is used.
From above the second oversheet 7 colored by the first heat plunger mechanism 21, a temperature of 150 ° C. and a pressure of 5
When heated and pressed at 2 kg / cm ² for 2 seconds, the second heat plunger mechanism 21 was opened by the sharp projections.
It was confirmed that the hole of the overseat 7 was closed.

Next, the plastic card was immersed in ethanol for 100 hours, and it was confirmed that no fading or decoloring occurred.

[0040]

As described above, according to the present invention, the present invention is provided with a function for presenting an indication of the number of uses required in the field of a prepaid card, and the coloring portion is faded or erased by a chemical or the like. Thus, a plastic card having a heat-sensitive coloring layer and a method for manufacturing the same can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a laminated structure of a plastic card substrate formed by a 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 lamination 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 illustrating a plastic card according to an embodiment of the present invention and a coloring method using a first heat plunger mechanism 21.

FIG. 5 is a cross-sectional view illustrating a plastic card according to an embodiment of the present invention, and a method of closing a hole of a second overseat 7 by a first heat plunger mechanism 22;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st core sheet 2 1st oversheet 3 Developing layer 4 2nd core sheet 6 Adhesive 7 2nd oversheet 8 Coloring layer 9 Through hole 9 'Separation layer 21 1st heat plunger mechanism 22 Second heat plunger mechanism

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

Claims (8)

(57) [Claims] 1. A plastic card comprising a laminated body of a core sheet made of an opaque first thermoplastic resin and an oversheet made of a transparent second thermoplastic resin.
A color-forming layer comprising a color-forming agent and a color-forming layer binder, a color-developing layer comprising a color-developing agent and a color-developing layer binder which come into contact with the color-forming agent to form a color, and provided between the core sheet and the oversheet; And a separating layer comprising a fluid separating the color developing layer and the color developing layer. 2. The plastic card according to claim 1, wherein the color former contains at least a colorless leuco dye as an electron donor, and the developer contains an acidic substance as an electron acceptor. And plastic card. 3. The plastic card according to claim 1, wherein said first thermoplastic resin is made of milky white hard vinyl chloride, and said second thermoplastic resin is made of transparent hard vinyl chloride. Plastic card. 4. The plastic card according to claim 1, wherein the fluid of the separation layer is air. 5. A first core sheet made of an opaque first thermoplastic resin on which a color developing layer made of a color developing agent and a color developing layer binder is printed, and a surface opposite to the surface on which the color developing layer is printed. Are overlapped so as to be in contact with a first oversheet made of a transparent second thermoplastic resin, and an adhesive is applied to four sides of a surface of the first core sheet on which the color-developed layer is printed, and through holes are formed in advance. A second core sheet made of an opaque first thermoplastic resin provided with an adhesive is laminated and adhered, and then an adhesive is applied to four sides of the second core sheet, and the color is formed by previously contacting the developer. A second oversheet made of a transparent second thermoplastic resin printed with a color forming layer made of a color forming agent and a color forming layer binder is stacked such that the surface on which the color forming layer is printed faces the color developing layer. The plastic card laminate obtained by bonding is sandwiched between mirror metal plates. Heat-pressing to form the color-developing layer, the color-developing layer, and a separation layer made of a fluid separating the color-developing layer and the color-developing layer between the core sheet and the oversheet. Plastic card manufacturing method. 6. The method for manufacturing a plastic card according to claim 5, wherein the color former contains at least a colorless leuco dye that is an electron donor, and the developer contains an acidic substance that is an electron acceptor. A method for producing a plastic card, characterized in that: 7. The method for manufacturing a plastic card according to claim 5, wherein said first thermoplastic resin is made of milky white hard vinyl chloride, and said second thermoplastic resin is made of transparent hard vinyl chloride. Characteristic plastic card manufacturing method. 8. The method for manufacturing a plastic card according to claim 5, wherein the fluid of the separation layer includes air.