JPH10240895A - Magnetic card, its manufacture and its using method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic card and using method hardly altering the card fraudulently and capable of sufficiently securing the security of the card. SOLUTION: This magnetic card is provided with a shape memory magnetic recording layer 6 including urethane shape memory resin on a card substrate 1. At the time of dispersedly pressurizing the layer 6 on a temperature condition being not lower than a transition temperature and being not higher than a melting point concerning the urethane shape memory resin. A recessed and projecting part for a bar code 6a is formed. Though a magnetic output pattern can be read from the part 6a, at the time of heating this on a temperature condition being not lower than a transition temperature and being not higher than a melting point concerning the urethane shape memory resin, its shape is restored to reproduce the flattening of the layer 6 to erase the magnetic output pattern. The forming of the part 6 and its shape restoration (erasing) like these can be repeated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic card mainly including a magnetic recording layer containing a shape memory resin as a dispersing resin, and a method of manufacturing and using the same.

[0002]

2. Description of the Related Art Heretofore, a magnetic card of this type has been developed which is designed to ensure the security of magnetically recorded information. For example, FIG. 3 is a partial side view showing the basic structure of such a magnetic card.

This magnetic card has a magnetic recording layer 2 made of a magnetic substance made of a magnetic powder and a dispersing resin for writing and recording magnetic information on a card substrate 1, and a bar for holding unique information for authenticity determination. A concealing layer 3 including a magnetic barcode 3a in which a magnetic material is dispersed for a code and a protective layer 4 made of a nonmagnetic material such as a resin are laminated in this order.

In this magnetic card, the magnetic barcode 3a is provided by performing various printings such as screen printing, offset printing, and gravure printing on the magnetic recording layer 2. The magnetic barcode 3a is unique to the magnetic barcode 3a. The information is used for discriminating the authenticity separately from the magnetic information recorded on the magnetic recording layer 2, so that the security in using the magnetic card is ensured.

[0005]

In the case of a magnetic card having a magnetic bar code for discriminating the authenticity other than the magnetic recording layer for recording magnetic information described above, the magnetic bar code is provided by various printings and is formed once. It is extremely difficult to rewrite the bar code pattern of the magnetic bar code during use of the card, so that the magnetic information can be easily rewritten even if the bar code pattern itself is complicated. There is a problem that it is easy to carry out and it is not possible to sufficiently measure the safety of card use.

SUMMARY OF THE INVENTION The present invention has been made to solve such problems, and its technical problem is that it is difficult to modify the card, and the magnetic card and the method of manufacturing the magnetic card can sufficiently secure the safety of use of the card. And to provide a method of use.

[0007]

According to the present invention, in a magnetic card having a magnetic recording layer made of a magnetic material provided on a card substrate as a support, the magnetic recording layer becomes a component of the magnetic material. A magnetic card which is a shape memory magnetic recording layer containing a shape memory resin as a resin for dispersing magnetic powder is obtained.

According to the present invention, in the above magnetic card, the shape memory magnetic recording layer is provided on a card substrate, and is provided with a first shape memory magnetic recording layer for writing magnetic information. A magnetic card comprising the second shape memory magnetic recording layer provided on the first shape memory magnetic recording layer and used for forming a bar code is obtained.

According to the present invention, on the other hand, in a method of manufacturing a magnetic card in which a magnetic recording layer of a magnetic material in which a magnetic powder and a dispersing resin are mixed is formed on a card substrate as a support, the shape memory is stored in the dispersing resin. A method for manufacturing a magnetic card in which a shape memory magnetic recording layer is formed as a magnetic recording layer using a resin is obtained.

According to the present invention, in the method for manufacturing a magnetic card, in the step of forming the shape memory magnetic recording layer,
A first layer forming step of forming a first shape memory magnetic recording layer for writing magnetic information on a card substrate by using a different magnetic material; and forming a first shape memory magnetic recording layer on the first shape memory magnetic recording layer. A second layer forming step of forming a second shape memory magnetic recording layer provided for forming a bar code.

On the other hand, according to the present invention, in any one of the above-mentioned methods for using a magnetic card, the temperature of the shape memory magnetic recording layer or the second shape memory magnetic recording layer is not lower than the transition temperature of the shape memory resin. In addition, a method of using a magnetic card in which unevenness for a bar code is formed by dispersively pressing under a temperature condition equal to or lower than the melting point is obtained.

Further, according to the present invention, in the above-mentioned method for using a magnetic card, a method for using a magnetic card for reading a magnetic output pattern from an uneven portion for a bar code is obtained.

Further, according to the present invention, in the above method of using a magnetic card, the barcode concave / convex portion is heated under a temperature condition not lower than the transition temperature of the shape memory resin and not higher than the melting point to restore the shape. Thus, a method of using the magnetic card to erase the magnetic output pattern can be obtained.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

First, the outline of the basic configuration of the magnetic card of the present invention will be briefly described. This magnetic card has an existing configuration in which a magnetic recording layer made of a magnetic material is provided on a card substrate as a support, and the magnetic recording layer is made of a shape memory resin as a resin for dispersing magnetic powder that is a component of the magnetic material. And a shape memory magnetic recording layer. Further, the shape memory magnetic recording layer in this magnetic card is provided on the card substrate 1 as shown in FIG. 1 as a partial side view of the basic structure of the magnetic card according to one embodiment of the present invention. First Shape Memory Magnetic Recording Layer 5 Used for Writing
And a second shape memory magnetic recording layer 6 provided on the first shape memory magnetic recording layer 5 and used for forming a bar code.

When such a magnetic card is manufactured, a magnetic recording layer made of a magnetic material obtained by mixing a magnetic powder and a dispersing resin on a card substrate 1 serving as a support is basically used as an existing structure as shown in FIG. In forming the magnetic recording layer 2, a shape memory magnetic recording layer may be formed as the magnetic recording layer 2 using a shape memory resin as a dispersing resin. However, in the case of the configuration shown in FIG. 1, in the stage of forming the shape memory magnetic recording layer, the first shape used for writing magnetic information on the card substrate 1 by using a different magnetic material is used. A first layer forming step of forming the storage magnetic recording layer 5, and a second layer of forming a second shape memory magnetic recording layer 6 for forming a bar code on the first shape memory magnetic recording layer 5 The formation step may be performed.

For any of these magnetic cards, as a method of use, the transition temperature of the shape memory resin with respect to the shape memory magnetic recording layer and the second shape memory magnetic recording layer 6 (may be regarded as the glass transition temperature Tg). That is all
Under a temperature condition not higher than the melting point, the heating head (heating stamping head) is pressurized in a distributed manner to form the bar code irregularities, and the magnetic output pattern is read from the bar code irregularities by the magnetic head. If the magnetic output pattern is erased by heating or restoring the shape by heating the barcode uneven portion at a temperature condition not lower than the melting point but higher than the transition temperature of the shape memory resin, the barcode Since the pattern can be freely changed and the authenticity can be determined based on the variable unique information, the safety of use of the card is sufficiently ensured, and it is difficult to modify the card.

Therefore, a method of manufacturing the magnetic card shown in FIG. 1 will be specifically described below. Here, first, as a first layer forming step for the shape memory magnetic recording layer, the card substrate 1
A first magnetic recording layer used for F2F recording, etc.
Is formed. The first shape memory magnetic recording layer 5 has a coercive force of 2750 [O
e), and a urethane-based shape memory resin is used as the shape memory resin. These are mixed and then dispersed on the card substrate 1 to have a thickness of 5 μm.
m], the barium ferrite powder is dried and hardened by applying magnetic orientation to the barium ferrite powder.

Next, as a second layer forming step, a second shape memory magnetic recording layer 6 for forming a bar code is formed on the first shape memory magnetic recording layer 5. For the second shape memory magnetic recording layer 6, an iron oxide powder having an average particle size of 2 [μm] is used as the magnetic powder, and a urethane-based shape memory resin is used as the shape memory resin. Is dispersed on the shape memory magnetic recording layer 5 and applied over the entire surface with a thickness of 5 μm, and then dried.

However, in both the first layer forming step and the second layer forming step, the mixing ratio of the barium ferrite powder or the iron oxide powder to the urethane-based shape memory resin is such that the shape memory characteristics can be sufficiently exhibited. It is desirable to determine the value in advance by experiments or the like.

FIG. 2 is a partial side view for explaining a method of using a magnetic card according to another embodiment of the present invention in which the configuration of the magnetic card shown in FIG. 1 is simplified. ) Relates to the initial shape before the formation of the bar code-shaped uneven portion, FIG. 12B relates to the shape after the formation of the bar code-shaped uneven portion, and FIG. It is related to the form after restoration.

In this magnetic card, as is apparent from FIG. 2A, the second shape memory magnetic recording layer 6 is provided on the card substrate 1 without providing the first shape memory magnetic recording layer 5. Things.

In this magnetic card, the engraving head is heated to a temperature higher than the transition temperature (glass transition temperature Tg) of the urethane-based shape memory resin with respect to the second shape memory magnetic recording layer 6 and lower than the melting point. If pressure is applied in a more dispersive manner, as shown in FIG. 2 (b), the bar code unevenness 6a is formed by rapid cooling thereafter. Since the shape of the bar code concavo-convex portion 6a is maintained after the engraving by heating, a magnetic output pattern as a bar code can be easily read from the bar code concavo-convex portion 6a by a reading magnetic head.

Subsequently, after the reading of the magnetic output pattern from the bar code concavo-convex portion 6a, the transition temperature of the urethane-based shape memory resin is applied to the bar code concavo-convex portion 6a (the second shape memory magnetic recording layer 6). When heated under a temperature condition of not less than (glass transition temperature Tg) and not more than the melting point, as shown in FIG. 2 (c), the bar code concave and convex portions 6a are restored to the second shape memory. Since the flattening of the magnetic recording layer 6 is reproduced, the magnetic output pattern can be erased. In addition, such FIG.
The formation of the bar code concavo-convex portion 6a and the shape restoration (erasing) thereof shown in (c) can be repeatedly performed.

[0025]

As described above, according to the present invention, a magnetic card is manufactured by providing a shape memory magnetic recording layer containing a shape memory resin on a card substrate. The bar code unevenness is formed by dispersively pressing the shape memory magnetic recording layer at a temperature not lower than the transition temperature of the shape memory resin and equal to or lower than the melting point. The magnetic output pattern is erased by reading the output pattern or heating the barcode uneven portion under the temperature condition of the transition temperature of the shape memory resin or higher and the melting point or lower to restore the shape. It becomes possible. As a result, since the barcode pattern can be freely changed and the authenticity can be determined by the variable unique information, the safety of use of the card can be sufficiently secured, and the card can be hardly altered. Since the formation of the concave and convex portions for use and the restoration (erasing) of the shape can be repeatedly performed, the simplicity and durability of the card can be improved, which is extremely useful in industry.

[Brief description of the drawings]

FIG. 1 is a partial side view showing a basic configuration of a magnetic card according to one embodiment of the present invention.

FIGS. 2A and 2B are partial side views for explaining a method of using a magnetic card according to another embodiment of the present invention in which the configuration of the magnetic card shown in FIG. 1 is simplified, and FIG. (B) relates to the form after the formation of the bar-code-like unevenness, and (c) relates to the form after the shape is restored by heating the bar-code-like unevenness.

FIG. 3 is a partial side view showing a basic configuration of a conventional magnetic card.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Card board 2 Magnetic recording layer 3 Concealment layer 3a Magnetic barcode 4 Protective layer 5 First shape memory magnetic recording layer 6 Second shape memory magnetic recording layer 6a Bar code unevenness

Claims (7)

[Claims] 1. A magnetic card in which a magnetic recording layer made of a magnetic material is provided on a card substrate as a support, wherein the magnetic recording layer has a shape memory as a resin for dispersing magnetic powder as a component of the magnetic material. A magnetic card comprising a shape memory magnetic recording layer containing a resin. 2. The magnetic card according to claim 1, wherein the shape memory magnetic recording layer is provided on the card substrate and is provided for writing magnetic information. A magnetic card comprising: a second shape memory magnetic recording layer provided on the first shape memory magnetic recording layer and used for forming a bar code. 3. A method for manufacturing a magnetic card in which a magnetic recording layer is formed of a magnetic material obtained by mixing magnetic powder and a dispersing resin on a card substrate as a support, wherein the dispersing resin comprises a shape memory resin. A method for manufacturing a magnetic card, wherein a shape memory magnetic recording layer is formed as a magnetic recording layer. 4. The method for manufacturing a magnetic card according to claim 3, wherein in the step of forming the shape memory magnetic recording layer, a different magnetic material is used for writing magnetic information on the card substrate. Forming a first shape memory magnetic recording layer to be formed, and forming a second shape memory magnetic recording layer to be used for forming a bar code on the first shape memory magnetic recording layer. A method for manufacturing a magnetic card, comprising: a second layer forming step. 5. The method for using a magnetic card according to claim 1, wherein a temperature of the shape memory magnetic recording layer or the second shape memory magnetic recording layer is equal to or higher than a transition temperature of the shape memory resin. And a method of using a magnetic card, wherein the barcode unevenness is formed by dispersively pressing under a temperature condition not higher than the melting point. 6. The method for using a magnetic card according to claim 5, wherein a magnetic output pattern is read from the bar code uneven portion. 7. The method for using a magnetic card according to claim 6, wherein the barcode concave / convex portion is heated under a temperature condition not less than a transition temperature of the shape memory resin and not more than a melting point to restore the shape. A method of using the magnetic card, wherein the magnetic output pattern is erased.