JP2624393B2 - Magnetic card - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic card having a magnetic recording layer, such as a credit card, a bank card, and a ticket.

[0002]

2. Description of the Related Art A magnetic card in which a magnetic recording layer is provided in a predetermined direction at a constant width on a base made of a vinyl chloride sheet, and a predetermined area such as a character or a number is provided by embossing processing, It is widely used as credit cards, bank cards, food and drink tickets, refueling tickets, shopping tickets, and the like. The magnetic recording layer of these conventional magnetic cards is called a magnetic stripe, and is formed by transferring a magnetic layer on a PET (polyethylene terephthalate) tape or the like when hot pressing two or more vinyl chloride sheets.

FIGS. 2 and 3 show the outline of the configuration. FIG. 2 shows a conventional magnetic card.
The substrates 11 and 12 of the vinyl chloride sheet on which the designs 31 and 32 are printed, respectively,
And 32, a transparent vinyl chloride sheet substrate 13 which can be seen through
And 14, the magnetic stripe 2 transferred to the substrate 13
1, and characters and numerals 33 and 34 by emboss processing. Accordingly, the magnetic stripe 21 restricts the printing surface of the characters, designs, etc. 31, and restricts the degree of freedom of design, which hinders high design.

Recently, in order to increase the degree of freedom of this design, as shown in FIG. 3, a concealing layer 22 is provided on the entire surface of the substrate 13 on which the magnetic stripe 21 has been transferred, and characters, designs, etc. 31 are provided on the concealing layer 22. , And the number of magnetic cards 10 that protect the print with a protective layer 23 is increasing. However, the formation of the concealing layer 22 for concealing the magnetic stripe 21 requires a special concealing technique for concealing a step, a color difference and the like between the magnetic stripe 21 and the base 13 of the transparent vinyl chloride sheet onto which the magnetic stripe 21 is transferred. It was necessary and hindered productivity improvement. Further, the magnetic stripe 21 is relatively expensive, and it is difficult to perform alignment during transfer formation.
Improvements have been desired in terms of material costs and production costs.

[0005]

An object of the present invention is to provide a novel magnetic recording layer applying method which is excellent in material cost and productivity in place of a magnetic stripe, and which uses a magnetic technique without using a special technique. An object of the present invention is to make it possible to easily use the entire surface of the card on the magnetic recording layer side as a printing surface.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a magnetic card in which a magnetic recording layer is provided on a base made of a vinyl chloride sheet, and a desired area such as characters and numerals is embossed on a predetermined area. A magnetic recording layer is provided on the entire surface of the substrate, a concealing layer for concealing the magnetic recording layer is further provided, and the appearance of the embossed portion which is caused by peeling, missing and cracking of the magnetic recording layer or the concealing layer by embossing A magnetic card characterized by little or no badness.

Hereinafter, the configuration of the present invention will be described with reference to a cross-sectional view (FIG. 1) of one embodiment. The magnetic card 10 is formed by hot-pressing the substrates 11, 12, 13, and 14 of the vinyl chloride sheet by hot pressing and heat-sealing.
It is also possible to bond each with an adhesive. The thickness of the magnetic card 10 is based on Japanese Industrial Standard (JISB956).
0) It is determined by the "credit card with magnetic stripe", and has a maximum of 0.80 mm and a minimum of 0.068 mm. Accordingly, the number of layers and the thicknesses of the bases 11, 12, 13, and 14 are not particularly limited as long as the thickness of the magnetic card 10 is in the above range (four layers in this embodiment).

A magnetic recording layer 21 and a concealing layer 22 are sequentially laminated on one surface of the base 13 of the magnetic card 10 over the entire surface. The concealing layer 22 conceals the color of the magnetic recording layer 21, and characters, designs, etc. 31 and its protective layer 23 are sequentially printed on the upper layer by various printing means. On one surface of the base 12, characters, designs, etc. are printed by various printing means.
2 is printed, and the base 14 uses a transparent sheet to protect the printed characters, designs and the like 32.

Next, the material of each component will be described. Base 1
1, 12, 13 and 14 are vinyl chloride sheets. Here, vinyl chloride refers to a vinyl chloride resin, which is a vinyl chloride homopolymer and a vinyl chloride copolymer containing at least 50 wt% of vinyl chloride as a main component, and is copolymerized with the vinyl chloride. Examples of the copolymer include olefins such as vinyl acetate, ethylene, and propylene. Considering the physical properties required for the substrate, for example, strength, rigidity, concealing property and the like, preferable materials are selected from the above materials, and additives such as a reinforcing agent, a stabilizer and a lubricant may be appropriately added.

The magnetic recording layer 21 is made of γ-Fe ₂ O ₃ , Co
Γ-Fe ₂ O ₃ , Fe ₃ O ₄ , CrO ₂ , Fe, F
e-Cr, Fe-Co, Co-Cr, Co-Ni, Mn
A dispersion obtained by dispersing conventionally known magnetic fine particles such as Al, Ba ferrite, and Sr ferrite in a suitable resin or ink vehicle is applied to the substrate 13 by a conventionally known coating method such as a gravure method, a roll method, or a knife edge method. It can be formed over one surface over the entire surface. Its thickness is about 1 to 100 μm, preferably about 5 to 30 μm. As a resin or an ink vehicle in which magnetic fine particles such as γ-Fe ₂ O ₃ are dispersed, butyrate resin, vinyl chloride / vinyl acetate copolymer resin, urethane resin, polyester resin, cellulose resin, acrylic resin, styrene / maleic acid A copolymer resin or the like is used, and a rubber-based resin such as a nitrile rubber or a urethane elastomer is added as necessary. Further, in a dispersion obtained by dispersing the magnetic fine particles in the resin, if necessary, a surfactant, a silane coupling agent, a plasticizer, a wax,
Silicone oil, carbon and other pigments can also be added. In order to reduce or eliminate the peeling, chipping, and cracking of the characters and numerals 33 and 34 due to the embossing treatment, the magnetic recording layer 21 is selected from the above resin and solvent so as to be sufficiently adhered to the substrate 13. ing.
Further, if necessary, a resin layer having an anchor effect can be provided between the base 14 and the magnetic recording layer 21 in order to increase the adhesion of the magnetic recording layer 21.

Next, Te, Sn, In,
AL, Bi, Pb, Zn, Fe, Co, Ni, Cr, A
g or a compound of the above metal such as an alloy thereof or Te-carbide.
It can be formed on the magnetic recording layer 21 by a sputtering method, a plating method, or the like. Further, the concealing layer 22 is made of the above metal,
A conventionally known coating method such as a gravure method, a roll method, or a knife edge method is applied to a dispersion obtained by dispersing fine particles of a white pigment compound such as titanium oxide in an appropriate resin described in the magnetic recording layer 21 or in an ink vehicle. Depending on the method, the layers can be sequentially formed. The thickness of the concealing layer 22 is as large as possible for the concealing property of the magnetic recording layer 21, and conversely, in order to reduce the distance between the magnetic recording layer 21 and the magnetic head of the reader / writer and increase the signal output voltage. Or letters and numbers 33 by embossing
In order to reduce or eliminate exfoliation, chipping and cracking of parts 34 and 34, it is desirable to make the parts as thin as possible. Therefore, this thickness is 0.5 to 20μ, preferably 1 to 15μ.

[0012]

As described above, the magnetic card of the present invention does not use a magnetic stripe and uses a vinyl chloride sheet coated with a magnetic recording layer on the entire surface as a single layer of the base material, so that the material cost can be reduced and the positioning is difficult. It is released and productivity can be improved.
Furthermore, since a vinyl chloride sheet coated with a magnetic recording layer over the entire surface is used as one layer of the base, it is easy to form a concealing layer for concealing the magnetic recording layer, and the productivity can be improved without requiring a special concealing technique. . Further, printing can be performed on the entire surface on which the magnetic recording layer is formed, and the degree of freedom in design is increased. In addition, since the adhesion between the magnetic recording layer and the substrate is enhanced, the magnetic recording layer or the concealing layer has little or no peeling, missing or cracking that impairs the appearance of the embossed portion.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a magnetic card according to the present invention.
(A) is a plan view, and (b) is a cross-sectional view taken along line TT 'of (a).

Claims (2)

(57) [Claims] 1. A magnetic card in which a magnetic recording layer is provided on a base made of a vinyl chloride sheet, and a desired area such as characters and numerals is applied to a predetermined area by embossing. And a concealing layer for concealing the magnetic recording layer, and embossed. 2. The magnetic card according to claim 1, wherein said magnetic recording layer is a coating layer.