JP3308317B2 - High durability 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 highly durable magnetic card having a magnetic recording layer concealed by a transfer-formed ceramic thin film layer.

[0002]

2. Description of the Related Art Heretofore, in a card having a magnetic recording layer on its surface, it has been hard to say that the magnetic recording layer has a poor appearance and is excellent in design because the color of the magnetic recording layer is black or brown. For this purpose, a so-called concealment card, in which a concealment layer is provided to make the magnetic recording layer invisible, is generally used. The concealing layer is formed mainly by a printing method using a coloring ink or an ink containing a metal powder such as aluminum.

[0003]

However, the concealing layer formed by printing with ink has poor durability such as abrasion and scratching of the ink surface. The durability of the surface has been improved by forming a protective layer using a curable resin or the like (Japanese Patent Laid-Open No.
-270991). However, durability is often insufficient even by such a method. It is also possible to improve the durability by increasing the thickness of the printed layer, but if the thickness of the layer provided on the magnetic recording layer increases,
There is a problem that the reading of the magnetically recorded information is hindered.

The present invention has been made to solve the above-mentioned drawbacks, and has as its object to provide a highly durable magnetic card in which a ceramic thin film layer is provided on a magnetic recording layer to improve durability. I do.

[0005]

The present invention provides (1) magnetic recording
Magnetic layer provided on at least a part of the surface of the card substrate
In a card, at least a part of the magnetic recording layer
A coating layer having a laminating thin film layer
Sheet, synthetic paper or paper whose body is made of thermoplastic resin
A highly durable magnetic card,
(2) The ceramic thin film layer is formed by transfer.
The highly durable magnetic car according to (1) above,
(3) The coating layer is a decorative layer and / or a ceramic thin film layer.
Or having a hologram layer (1) or
Is the highly durable magnetic card described in (2), (4) above the magnetic recording layer
That the thickness of the coating layer laminated on the
High durability according to any one of (1) to (3) above,
A magnetic card.

[0006]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a highly durable magnetic card according to the present invention, in which 1 represents a highly durable magnetic card.

A highly durable magnetic card 1 according to the present invention comprises a card base 2 having a magnetic recording layer 3 provided on the magnetic recording layer 3 side.
A coating layer including at least a ceramic thin film layer is provided. The ceramic thin film layer 5 is formed over the magnetic recording layer 3 over the entire surface or a part of the card base 2 with the adhesive layer 4 interposed therebetween, and conceals the magnetic recording layer 3.

As the card base 2, a sheet made of a thermoplastic resin, a synthetic paper sheet or paper is used. Examples of the thermoplastic resin constituting the base 2 include polyvinyl chloride, polyolefin, polyethylene terephthalate, polystyrene, polymethacrylate, and polycarbonate. The base 2 is not limited to a single-layer structure, and may have a stacked structure of two or more layers, and may have an appropriate number of layers according to a method in a manufacturing process and manufacturing efficiency. When the base material 2 has a laminated structure of a plurality of layers, the respective layers can be laminated by thermocompression bonding, or can be laminated with an adhesive if necessary. The overall thickness of the base 2 is about 0.7 mm according to the standard of the card.

The magnetic recording layer 3 can be formed by a known transfer method or coating method, and has a thickness of 10 to 20 μm.
It is preferable to form it to such an extent. Usually, the magnetic recording layer 3
Is provided in a stripe on a part of the surface of the substrate 2, but the magnetic recording layer 3 may be provided on the entire surface of the substrate 2. As the magnetic composition for constituting the magnetic recording layer 3, a known magnetic composition in which magnetic powder is dispersed in a resin binder can be used.

In order to form the coating layer 7 including the ceramic thin film layer 5 on the magnetic recording layer 3 of the card base 2, for example, a transfer method can be adopted. In order to obtain the magnetic card 1 of the present invention in which the magnetic recording layer 3 is hidden by the ceramic thin film layer 5 by the transfer method, a transfer foil 14 provided with the ceramic thin film layer 5 is prepared in advance. The transfer foil 14 has a transfer layer 9 formed by sequentially laminating a release layer 6, a ceramic thin film layer 5, and an adhesive layer 4 on a base film 8 as shown in FIG.

The material of the base film 8 is a transfer layer 9
Any material may be used as long as it has releasability from, for example, polyethylene terephthalate is most preferable in terms of dimensional stability, heat resistance, toughness, etc., but in addition to this, polyvinyl chloride, polypropylene, polyethylene, polycarbonate, cellophane, vinylon, acetate And synthetic resins such as nylon, polyvinyl alcohol, polyamide and polyamide imide, and paper such as condenser paper. In addition, the thickness of the base film 8 is preferably about 6 μm to 25 μm.

The release layer 6 is a layer located on the outermost surface side of the transfer object after the transfer layer 9 is transferred from the transfer foil 14 to the card base 2, and is provided for the purpose of improving peelability and foil breakability. Various known materials can be used depending on the material of the base film 8. Examples of the material of the release layer 6 include polymethacrylate resin, polyvinyl chloride resin, cellulose resin, silicone resin, waxes mainly composed of hydrocarbons, polyethylene resin, chlorinated rubber, casein, various surfactants, and metal oxides. One or a mixture of two or more of the above materials is used. Depending on the combination with the base film 8, the peeling force is 1 g / inch to 5 g / inc.
h (90 degree peeling).
The release layer 6 is formed into a thin film on the base film 8 by a known method such as an inking coating method, and the thickness thereof is determined by a release force,
The range of 0.1 μ to 1.0 μ is preferable in consideration of foil breakage and the like.

The ceramic thin film layer 5 is superimposed on the release layer 6.
As a means for providing, a vacuum film formation method such as vacuum deposition, sputtering, ion plating, or reactive deposition is given. The material for forming the ceramic thin film layer 7 is Sb ₂ S ₃ , SiO, Fe ₂ O ₃ , InO ₃ , T
iO, Si ₂ O ₃ , TiO ₂ , MgO, Al ₂ O ₃ , Z
Examples thereof include nS, ZnO, SiO ₂ , Sb ₂ O ₃ , and SiO _3. These may be used alone or in combination of two or more. The thickness of the ceramic thin film layer 5 provided in this manner is 100 to 5 mm.
Preferably it is 000 °, more preferably 500 °
Å1000 °.

The adhesive layer 4 is provided by applying a heat sealant on the ceramic thin film layer 5. Examples of the heat sealant for forming the adhesive layer 4 include acrylic, vinyl chloride, and vinyl acetate heat sealants. When the adhesiveness of these heat sealants to the ceramic thin film layer 5 is poor, a pretreatment is performed by, for example, applying a primer to the surface of the ceramic thin film layer 5. Examples of the primer include a coupling agent, a chelating agent, an isocyanate and the like.

The transfer foil 14 and the card base 2 are overlapped and heated so that the adhesive layer 4 side of the transfer foil 14 thus obtained and the magnetic recording layer 3 side of the card base 2 face each other. When the base film 8 is peeled off after pressing, a transfer layer 9 having the ceramic thin film layer 5 is transferred and formed on the card base 2. As a result, a ceramic thin film layer 5 for covering the magnetic recording layer 3 is formed on the card base 2 in a thin film shape. Before the transfer layer 9 is formed on the card base 2 by transfer,
As shown in FIG. 3, an ink layer 12 may be provided with a known colored ink or an ink containing a metal powder such as aluminum, or a pattern print 13 may be provided on the magnetic recording layer 5 of the card base 2. .

A decorative layer 10 is provided between the ceramic thin film layer 5 and the release layer 6 provided on the transfer layer 9 of the transfer foil 14.
And / or a hologram layer 11 may be provided. When such a transfer foil 14 is used, the magnetic card 1 in which the decorative layer 10 and / or the hologram layer 11 are formed on the ceramic thin film layer 5 as shown in FIG. 3 can be obtained.

The decorative layer 10 is provided for improving the decorativeness of the card 1. The decorative layer 10 is provided with a pattern printing layer on which a pattern, a picture, a pattern, or the like has been applied with ordinary ink, or has been solid printed with coloring ink. Each layer such as a colored layer may be used alone or may be composed of two or more layers.

The hologram layer 11 only needs to exhibit a hologram effect, and examples thereof include a reflection type relief hologram and a diffraction grating. The hologram layer 11 is made of a thermoplastic resin, a thermosetting resin, or an ionizing radiation-curable resin. It can be formed using various resin materials such as. in this case,
The ceramic thin film layer 5 also functions as the reflection layer. The thickness of the coating layer 7 formed on the magnetic recording layer 3 of the highly durable magnetic card 1 of the present invention is preferably 10 μm or less, more preferably in the range of 0.5 μm to 5 μm. In addition, the decoration layer 10,
If the hologram layer 11, the ink layer 12, the pattern print 13, and the like are provided, the thickness of the coating layer 7 can be 10 μm or more.

As described above, since the ceramic thin film layer 5 for concealing the magnetic recording layer 3 formed on the card substrate 2 by transfer in the present invention is formed on the magnetic recording layer 3 in the form of a thin film, When reading the information recorded on the magnetic recording layer 3, it does not hinder the reading. Further, since the ceramic thin film layer 5 is formed of the above-described material, it has excellent durability. In order to obtain the highly durable magnetic card 1 of the present invention in which the ceramic thin film layer 5 is formed in a thin film on the magnetic recording layer 3, although not particularly shown, a base film / peeling layer / ceramic layer / magnetic layer / adhesion Using the transfer layer 14 configured as an agent layer, the magnetic layer 3 covered with the ceramic layer 5 can be transferred onto the substrate 2 in one transfer.

Hereinafter, the present invention will be described in more detail with reference to specific examples. Example 1 A 25 μm-thick polyethylene terephthalate film was used as a base film 8, an acrylic resin dissolved in a solvent was coated on the film by a known coating method, and then dried to form a 0.5 μm-thick release layer 6. After performing a corona discharge treatment on the surface on which the release layer 6 was formed, a ceramic thin film layer 5 of titanium dioxide (TiO ₂ ) was formed into a thin film having a thickness of 400 ° by a vacuum evaporation method. Then, a coating liquid as a heat sealant containing 100 parts by weight of acrylic resin and 10 parts by weight of microsilica is applied on the ceramic thin film layer 5 by reverse coating three coats so as to have a dry thickness of 3 μm. Coating to form an adhesive layer 4 and transfer foil 1
4 was obtained. On the other hand, a card substrate 2 made of polyvinyl chloride and having a thickness of 0.76 mm and a stripe-shaped magnetic recording layer 3 having a width of 6 mm and conforming to JIS standards was prepared. The card base 2 is heated and pressurized so that the magnetic recording layer 3 side of the card base 2 and the adhesive layer 4 side of the transfer foil 14 face each other, and then the polyethylene terephthalate film 8 is peeled to separate the ceramic thin film layer 5. Transfer-formed on the card base 2,
The highly durable magnetic card 1 of the present invention was obtained. The thickness of the card 1 on the magnetic recording layer was 3.5 μm. The card 1 has good magnetic read output. Further, the abrasion resistance to the magnetic head is good, and the reading operation can be performed by 1000 times.
Even if the scanning was performed several times, there was no problem in reading, and scratches on the surface were slight.

[0021]

As described above, the present invention provides a magnetic recording medium.
A recording layer provided on at least a part of the surface of the card base;
In the magnetic card, at least a part of the magnetic recording layer
A card provided with a coating layer having a ceramic thin film layer
Substrate made of thermoplastic resin sheet, synthetic paper or paper
By adopting a configuration that is either
Card having a concealing layer printed and formed with a different ink
Compared with, it has better durability such as surface wear and scratches,
It is possible to improve durability without forming a thick printed layer
It is possible to prevent the reading of magnetic recording information.
Not even. The magnetic recording layer is made of a ceramic thin film layer.
Protected magnetic head when reading magnetic recording
And temperature, humidity, acid, alkali, etc.
Has excellent durability. Furthermore, the magnetic card of the present invention
Formed on the surface of the recording layer is a synthetic resin-based
Ceramic thin film layer instead of a printed layer mainly composed of
Therefore, it does not dissolve in solvent and has excellent solvent resistance
ing. Therefore, forgery and unauthorized use of the magnetic card can be prevented.
Can be In the present invention, the coating layer
It has a decoration layer and / or hologram layer in addition to the thin film layer
In other words, the decorative layer or hologram layer
To improve the design of the magnetic card of the present invention having a lamic thin film layer.
Can be up.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a highly durable magnetic card of the present invention.

FIG. 2 is a cross-sectional view of a transfer foil used to make an embodiment of the highly durable magnetic card of the present invention.

FIG. 3 is a sectional view showing another embodiment of the highly durable magnetic card of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magnetic card 3 Magnetic recording layer 5 Ceramic thin film layer 7 Coating layer 10 Decorative layer 11 Hologram layer

Claims (4)

(57) [Claims] 1. A magnetic card magnetic recording layer is provided on at least a portion of the card base surface, Ri Na provided a coating layer having a ceramic thin film layer on at least a part of the magnetic recording layer, the card base Sea made of thermoplastic resin
A highly durable magnetic card, which is made of any of synthetic paper and paper . 2. A ceramic thin film layer is formed by transfer.
2. The high durability according to claim 1, wherein
Magnetic card. Wherein wherein the coating layer is characterized by having in addition to the decorative layer and / or the hologram layer of the ceramic thin film layer
3. The highly durable magnetic card according to claim 1 or 2 . 4. The method according to claim 1, wherein the thickness of the coating layer laminated on the magnetic recording layer is 10 μm or less .
The highly durable magnetic card according to any one of the above.