JPH083897B2 - Multi-layer film for information storage card - Google Patents

Description

The present invention relates to a film for an information storage card such as a magnetic card, and more particularly to a film for an information storage multilayer card having a multilayer structure.

[Conventional technology]

In recent years, magnetic cards have been used in various fields such as ticket sales at stations, cashless at banks, and telephones. In addition, IC cards that can increase the storage capacity and add information processing functions are about to appear.

FIG. 11 is a diagram showing such a conventional magnetic card. FIG. 11 (a) is a plan view and FIG. 11 (b) is a sectional view taken along line AA.
In the figure, 1 is a polyester film layer and 2 is a magnetic layer.

In the figure, a single layer of a polyester film having excellent heat resistance, rigidity, solvent resistance, etc. is usually used as a film for a magnetic card, and a magnetic layer 2 is provided at the end of the film to store information. I am configuring. When using such a card, the insertion of a magnetic card into a card reader (not shown) is detected by detecting a hole formed in the corner of the card, or the light is blocked by the card. It was done by doing.

[Problems to be solved by the invention]

By the way, the conventional magnetic card has a security problem because even if it is a forged one, it cannot be sufficiently checked by a reader if physical conditions such as thickness, size and hole position are met. . Also, in the case of a milky white polyester film that is often used for cards, it is difficult to distinguish it from other things by appearance, and it is easily imitated, and it is extremely difficult to check whether it is a counterfeit product or not. .

The present invention is for solving the above-mentioned problems, and it is possible to easily check whether or not it is a straight one, improve security in card use, and imitate a product.
An object of the present invention is to provide a film for an information storage multilayer card, which has improved distinguishability from a counterfeit product and can be easily distinguished and recognized from them.

[Means for solving problems]

Therefore, the multilayer film for an information storage card of the present invention is characterized by laminating at least one plastic film layer and at least one plastic film layer as a detection layer having physical characteristics different from those of the film layer.

[Action]

The multi-layer film for an information storage card of the present invention has at least one plastic film layer and at least one plastic film layer as a detection layer having physical characteristics different from those of the film layer, so that it can be detected by a sensor or visually. Since it is possible to easily check whether it is a straight one or whether it is an imitation, etc. by utilizing the difference in physical characteristics, it is possible to improve the security in card use and at the same time as other things. It becomes possible to improve the distinctiveness of.

〔Example〕

 Embodiments will be described below with reference to the drawings.

FIG. 1 is a view showing the constitution of an embodiment of the multilayer film for information storage card according to the present invention. In the figure, 11 and 12 are milky white polyester film layers and 13 is a black polyester film layer.

In the figure, for example, a milky white polyester film layer 1
1 and 12 are 0.05 mm, black polyester film layer 13 is 0.15 m
It is about m and is extruded using a three-layer extruder and then stretched to form a laminate.

In this film, both sides are milky white, so
It is indistinguishable from the conventional single layer only by the front and back surfaces, but whether it is correct by checking the optical pattern of the cross section with a sensor or visually or by checking the light transmission of the film. Or, it is possible to easily check whether it is a counterfeit one, improving security in card use,
In addition, it becomes possible to improve the distinctiveness from other things.

Although the film layer 13 is black in this embodiment,
It does not necessarily have to be black, as long as it has different optical characteristics such as a color different from that of the film layers 11 and 12 or transparency, and the film layers 11 and 12 do not have to be milky white. If the film layers 13 have different optical characteristics in this way, it is possible to detect transmitted light with a sensor or check cross-sectional reflected light such as a peripheral cross section with a sensor or visually. As a method of making the optical characteristics of the film layer 13 different, in addition to the above-mentioned general coloring (including colorless), fine silica particles in the film, alumina particles, so as to diffuse or absorb light, A method of kneading a light diffusing agent such as glass powder or resin powder, using a film having fine porosity, or using a foaming film may be appropriately adopted.

Needless to say, the film is not limited to three layers and may be two or more layers, and the material is not only polyester but also polyethylene film, polypropylene film, polyvinyl chloride film, polyvinylidene chloride film, polyvinyl alcohol film, polycarbonate. A film, an acrylic film, a nylon film, a polystyrene film, an ethylene vinyl acetate copolymer film, an ethylene vinyl alcohol copolymer film, a plastic film such as an ionomer may be used, and depending on the card manufacturing method, use, shape, etc. Films made of these materials may be selected and used as appropriate. When using polyvinyl chloride film, polyvinylidene chloride film, etc., moldability as a card and IC chip embedding processing,
Processability in embossing etc. when putting a name etc. is improved, polycarbonate film, when using an acrylic film is suitable for an optical card, and curling can be prevented by appropriately combining films of the above materials, heat It is also possible to reduce deformation due to expansion and contraction and increase rigidity.

Further, in the above-mentioned examples, the laminate was formed by the extrusion molding method, but it goes without saying that it may not be extrusion molding, but it is also possible to adopt a method of laminating and laminating each layer with an adhesive.

Further, in the above-mentioned embodiment, the optical characteristics of the film layer 13 were different from those of the other film layers, but kneading conductive carbon into the film layer, kneading metal powder, or laminating metal layers, Magnetic film such as gamma ferrite, cobalt ferrite, barium ferrite, and strontium ferrite is kneaded into the conductive film provided with a metal vapor deposition layer, or the film layer is coated with the magnetic powder dissolved in a binder. It is possible to use a magnetic film as the film layer 13 so that the electrical or magnetic properties of the film are different from those of the other film layers, and the electrical or magnetic detection method can be used for the check, as in the case of the optical check. Become.

Further, if these electrical or magnetic checks are used together with the optical checks, it is possible to further improve security. For example, in the case of providing a metal vapor deposition layer, if this thickness is 0.1 μm or less, it is possible to have optical transparency, so it is possible to use both transparency detection and electrical detection. The detection of the reflected light of the cross section may be used together.

The multilayer magnetic card according to the present invention using the film of FIG. 1 will be described below.

FIG. 2 is a diagram showing an embodiment of a multi-layer magnetic card according to the present invention in which a magnetic layer is arranged at the end of the film. FIG. 2 (A) is a plan view, FIG. 2 (B) is a BB sectional view, FIG. 3 is a sectional view taken along the line CC of FIG. 2 for explaining the card reading method, in which 14 is a magnetic layer, 15 is a hole, 16 is a light emitting element, and 17 is a light emitting element.
Is a light receiving element.

As shown in FIG. 3, when this card is inserted into a card reader (not shown) in the direction of the arrow, the light receiving element 17 is first shielded from light at the tip of the card and then from the light emitting element 16 which passes through the hole 15. Detects light and is also blocked by the card.
The signal thus obtained can be used to detect that the card has been inserted, but when the polyester film layer 11 has a milky white color as shown in the embodiment of FIG. If the film is constructed as a single layer as shown in Fig. 11 (Fig. 11), a sufficient contrast with the hole portion cannot be obtained and accurate detection cannot be performed. In this respect, in the magnetic card having the configuration shown in FIG. 2, by making the polyester film layer 13 black, for example, the amount of transmitted light can be reduced by this layer and the contrast with the hole portion can be improved, so that accurate detection is possible. Become. Further, by selecting the transmittance of the film layer 13 to set the amount of transmitted light to a predetermined value, it is easy to check whether a straight one has been used, whether it is a counterfeit product, etc. It can be carried out.

As the magnetic layer 14, a film layer may be coated with gamma ferrite, cobalt ferrite, barium ferrite, strontium ferrite, or the like, or a film coated with these magnetic materials may be laminated. Further, the magnetic properties of the magnetic layer are preferably 300 to 3000 oersteds, if the coercive force is high, the stored information is not erased, and cobalt ferrite, barium ferrite, strontium ferrite or the like that can obtain a point coercive force of 650 oersted or more is preferable. .

FIG. 4 is a diagram showing another embodiment of the multilayer magnetic card according to the present invention in which a magnetic layer is arranged on the entire surface, and FIG. 4 (A) is a plan view.
4B is a sectional view, and FIG. 5 is a view for explaining the card reading method of FIG. 4, in which 18 is a magnetic layer, 19 is a light emitting element, and 20 is a CCD.

In FIG. 4, in order to increase the storage capacity, a magnetic layer 18 similar to the magnetic layer 14 of FIG. 2 is provided on the entire surface of the film, and no holes are provided.

In this case, as shown in FIG. 5, the cross section of the film is used, light is applied from the light emitting element 19, and the reflected light is detected by the CCD 20, for example. Now polyester film layers 11, 12
When the detected value of the reflected light from the milky white part is "1" and the detected value of the reflected light from the black part is "0" when the milky white is white and the polyester film 13 is black, (1,0,1) By detecting the coded signal, it is possible to detect whether or not the card is correct. Also at this time, CCD
By counting the number of bits obtained by the reflected light of the black portion and detecting the thickness thereof, the security can be further improved. Further, by further increasing the number of layers and reading the coded signal in the same manner, it is possible to check whether the card is a straight card or a counterfeit product. Also, if the film layer 13 is made relatively thick, it is possible to visually check whether it is a counterfeit product or not by using a sensor.

FIG. 6 is a diagram showing another embodiment in which the film layer 13 is made transparent. In this case, the same detection as in FIG. 5 can be performed by detecting the light transmitted through the film layer 13.

Next, a case where the card is detected electrically or magnetically will be described.

7 and 8 are views showing a detection method when the above-mentioned conductive film is used for the film layer 13, 21 and 22 are pin electrodes, and 23 is a meter.

When the film layer 13 has conductivity as shown in the figure, apply the pins 21 and 22 to the front and back surfaces (Fig. 7) or the cross section (Fig. 8) and measure the resistance between the electrodes. Can check whether the card is straight.
In this case, if the resistance value is appropriately set and the position at which the pin is brought into contact is also appropriately determined, the security in using the card can be further improved.

FIG. 9 is a diagram showing a detection method when the above-mentioned magnetic film is used as the film layer 13, 31 is an exciting head and 32 is a detecting head.

As shown in the figure, the card can be checked by detecting the magnetic flux when excited by the head 31 with the detection head 32 on the surface opposite to the magnetic layer 18 for data storage. In this case, no excitation head is needed if the film layer 31 is pre-magnetized. The film layer 12 is used when the magnetic influence of the exciting head may affect the magnetic layer 18.
May be made thicker and the film layer 11 may be made thinner, or a magnetic shielding layer may be provided between the film layer 13 and the magnetic layer 18.

FIG. 10 is a diagram showing a detection method using a Hall element.
Is a Hall effect element, and 34 is a meter.

In this case, pre-magnetize the magnetic film layer,
The strength of this magnetic force is detected by the Hall effect element 33 arranged in the cross section of the film.

Further, the detection of the magnetic film layer is not limited to the above method, and a method of detecting magnetic permeability, magnetic resistance, inductance or the like may be adopted.

By using the above electrical and magnetic detection methods in combination with an optical detection method instead of independently, it is possible to further improve security and improve the distinctiveness from other methods.

Although the magnetic card has been described in the above embodiments, the present invention can be applied to an information storage card such as an IC card or an optical card.

Further, the present invention, for example, for ticket sales at stations, cashless for banks, so-called prepaid cards for telephone, etc., transportation cards such as boarding tickets, commuter passes, pass tickets, ID cards, pass cards, medical cards, It can be widely applied to ID cards such as membership tickets, single tickets, voting tickets, horse tickets, vouchers such as certificates, financial cards such as bank cards, credit cards and cash cards.

〔The invention's effect〕

As described above, according to the present invention, by laminating at least one plastic film layer and at least one plastic film layer having physical characteristics different from that of the film layer, whether or not it is correct by a sensor or visual observation, or Since it is possible to easily check whether or not it is imitation by utilizing its physical characteristics, it is possible to improve the security in the use of the card and improve the distinguishability from other things. It will be possible.

[Brief description of drawings]

FIG. 1 is a diagram showing a structure of an embodiment of a multilayer film for an information storage card according to the present invention, and FIG. 2 is a diagram showing an embodiment of a multilayer magnetic card according to the present invention in which a magnetic layer is arranged at an end portion of the film. FIG. 4 (a) is a plan view, FIG. 2 (b) is a BB sectional view, FIG. 3 is a FIG. 2 (a) CC sectional view for explaining the card detection method, and FIG. FIG. 6 is a diagram showing another embodiment of the multilayer magnetic card according to the present invention in which a magnetic layer is arranged on the entire surface,
The figure (a) is a plan view, the figure (b) is a sectional view, FIG. 5 is a diagram for explaining the card detection method of FIG. 4, and FIG. 6 is another card detection with a transparent film layer. FIG. 7 is a diagram showing a method, FIG. 7 and FIG. 8 are diagrams showing an electric card detecting method, and FIG.
FIG. 10 is a diagram showing a magnetic card detecting method, FIG. 11 is a diagram showing a conventional magnetic card, FIG. 11 (a) is a plan view, and FIG. 11 (b) is a sectional view taken along line AA. . 11, 12 …… Milky white polyester film layer, 13 …… Black polyester film layer, 14 …… Magnetic layer, 15 …… Hole, 16
...... Light emitting element, 17 ...... Light receiving element, 18 ...... Magnetic layer, 19 ......
Light-emitting element, 20 …… CCD, 21,22 …… pin electrode, 23 …… meter, 31 …… excitation head, 32 …… sensing head, 33 …… Hall effect element, 34 …… meter.

Claims (3)

[Claims] 1. A multi-layer film for an information storage card, comprising at least one plastic film layer and at least one plastic film layer as a detection layer having physical properties different from those of the film layer. 2. The multilayer film for an information storage card according to claim 1, wherein the physical property is an optical property. 3. The multilayer film for an information storage card according to claim 1, wherein the physical property is an electrical or magnetic property.