JPH1139640A - Magnetic card - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the loss of antimicrobial power even if a magnetic arrangement is flawed by a header, roller, etc., of a card reader by subjecting the outermost layer and at least one of layer among inner layers of a nonmagnetic substrate, magnetic layer, concealing layer, printing ground surface layer, design printing layer, protective layer, etc., to an antimicrobial treatment. SOLUTION: This magnetic card is provided with the magnetic layer 2 on the magnetic surface side of the nonmagnetic substrate 1, the concealing layer 3 and the protective layer 4. At least one layer among the magnetic layer 2, the concealing layer 3 and the protective layer 4 is subjected to the antimicrobial treatment. The printing surface side of the nonmagnetic layer 1 is provided with the printing ground surface layer 5, the design printing layer 6 and the protective layer 7 and at least one layer among the printing ground surface layer 5, the design printing layer 6 and the protective layer 7 is subjected to the antimicrobial treatment. Further, the outer side of the protective layers 4, 7 is provided with a layer of an antimicrobial agent as a outermost layer. As a result, even if the outermost layer consisting of the antimicrobial agent is flawed or chipped by the card reader, any layer among the magnetic layer 2 to the protective layer 7 thereunder has the antimicrobial property and, therefore, the antimicrobial property is maintained and the proliferation of bacteria is suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic card which has been subjected to antibacterial treatment such as a prepaid card used by an unspecified number of people.

[0002]

2. Description of the Related Art In recent years, infections by various bacteria have become a social problem, and have caused an uproar in the world. In addition, with the improvement of living standards, the taste of cleanliness in the world is increasing. In this era, almost all people in the world have various information cards and are used by an unspecified number of people. In order to prevent infection by various bacteria when used by an unspecified number of people, cards such as magnetic cards, IC cards, ID cards, etc., whose front and back surfaces have been subjected to antibacterial treatment, are commercially available. In particular, there are many cards commercially available for inpatients at hospitals and the like that have been subjected to antibacterial treatment.

[0003]

This type of card has an antibacterial treatment on the front and back surfaces. However, when using the card only on the front and back surfaces, when using the card, the head inside the card reader, rollers, etc. While being rubbed many times, flaws and the like are formed, the antimicrobial layer on the surface is partially removed, and bacteria attached to this portion may proliferate, leading to infection.

An object of the present invention is to provide an inexpensive antibacterial magnetic card which does not lose its antibacterial effect even if it is scratched by a card reader head or roller.

[0005]

SUMMARY OF THE INVENTION The present invention provides a magnetic card having at least one magnetic layer on a non-magnetic substrate.
A magnetic card in which at least one of an outermost layer and an inner layer such as a nonmagnetic substrate, a magnetic layer, a concealing layer, a printing underlayer, a pattern printing layer, and a protective layer has been subjected to antibacterial treatment.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A magnetic card according to the present invention will be described.

[0007] The magnetic card of the present invention has an inner layer, that is, a nonmagnetic substrate, a magnetic layer, a concealing layer, a protective layer, a printing underlayer, a picture printing layer, and protection of the underlayer, in addition to the outermost layer subjected to the antibacterial treatment. The layers and the like are constituted by layers having antibacterial properties.

FIG. 1 is a sectional view of a magnetic card showing an example of the present invention.

This magnetic card has a magnetic layer 2 on the magnetic surface side of a non-magnetic substrate 1 made of PET or the like, as shown in FIG. 1, inside an antibacterial agent layer (not shown) as the outermost layer. Further, there is a concealing layer 3 for concealing the same, and a protective layer 4 for protecting the same. At least one of the magnetic layer 2, the concealing layer 3, and the protective layer 4 is subjected to an antibacterial treatment. A printing base layer 5 is provided on the printing surface side, and a picture printing layer 6 and a protective layer 7 for protecting the printing base layer 5 are present thereon. At least one of the printing base layer 5, the picture printing layer 6, and the protective layer 7 is also subjected to antibacterial treatment.

By adopting such a structure, the outermost layer made of the antibacterial agent is scratched by the card reader, and even if the outermost layer is missing, the lower layer has the antibacterial property, so that the antibacterial property is maintained and the bacteria Proliferation can be suppressed.

Further, if all the inner layers of the non-magnetic substrate and the like have antibacterial properties, it is more effective. For example, the side surface can always maintain high antibacterial property, and even if the card is deeply cut or the like, sufficient antibacterial property can be secured.

However, as an economical configuration, the nonmagnetic substrate is the thickest, and if it has antibacterial properties, the price of the card increases. Therefore, a magnetic card having an antibacterial property in a layer other than the non-magnetic substrate is more preferable in terms of price from two viewpoints, that is, the idea that the entire card has antibacterial properties as much as possible and the idea that the price is as low as possible. . It is also desirable that only the layer close to the outer layer have antibacterial properties. It is also desirable that each layer has an antibacterial property.

The antibacterial agent to be subjected to the antibacterial treatment may be an organic or inorganic substance as long as it has an antibacterial action, and is not particularly limited, but a commercially available one can be used. .

Examples of commercially available products are described in detail in Functional Materials, July 1995, "Antimicrobial / antifungal agents and applied products".

As the organic system, Amorden SK-50: isothiazoline system: Daiwa Chemical Industry Amorden SK-30Z: benzoic acid system: Daiwa Chemical Industry Vinazine: 10,10'-oxybisphenoxyarsine: Morton Thiokol Thiabendazole: 2- (4-Thiazolyl) -benzimidazole: Merck Preventol A-3: N- (fluorodichloromethylthio) -phthalimide: Bayer Mergar BCM: 2-methylcarbonylaminobenzimidazole: Riedel de Hahn

Inorganic bacterikiller: silver (copper), zeolite: Kanebo Novalon: silver zirconium phosphate: Toagosei Apasider: silver hydroxyapatite: sangi ionpure: silver phosphate glass: Ishizuka glass Antibacterial ceramic: silver phosphate ceramic ： Shinto Kogyo

From these commercially available products, those having little effect on magnetic properties, binder properties and the like, and having a large antibacterial effect as an antibacterial agent and having high safety may be selected.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments will be described below in detail.

(Example 1) A urethane-based binder and a vinyl chloride-vinyl acetate-based binder were added to Ba ferrite powder having a coercive force of 1750 Oe.
Toluene and MEK were added and mixed as an organic solvent, and 1% of Kanebo Bactekiller (main component: zeolite, silver), which is an inorganic antibacterial agent, was added and dispersed therein.
Coated, oriented, dried on 188 μm PET, thickness 10
A μm magnetic layer was formed.

[0020] On top of this, in the same manner,
% Of the silver paint was applied and dried to obtain a 2 μm thick concealing layer. On the other hand, on the other hand, firstly, an organic antibacterial agent, brand name thiabendazole of Merck [main component: 2-
(4-thiazolyl) -benzimidazole] was printed with a 1 to 2 μm ultraviolet curable medium ink containing 1%,
Similarly, a pattern was printed with an M, C, Y, or BK ultraviolet curable ink containing 1% thiabendazole.

Finally, an ultraviolet-curable OP varnish containing 1% of 1 baron (a main component: silver zirconium phosphate) manufactured by Toagosei Co., Ltd., which is an inorganic antibacterial agent, is applied to the printed surface and the magnetic surface. A magnetic card was printed at 2 μm and formed with an antimicrobial outermost layer.

(Example 2) Urethane-based, acrylic-based binder, toluene and MEK as an organic solvent were added to and mixed with Ba ferrite powder having a coercive force of 2750 Oe. Pure (main component: silver phosphate glass) was added and dispersed in a concentration of 0.5%, applied to 250 μm PET, and oriented and dried to form a 12 μm thick antibacterial magnetic layer.

On top of this, a white paint containing 1% of ion pure was applied and dried to obtain a 2 μm thick concealing layer.

On the other hand, an ultraviolet curable medium ink containing 1% of Amorden SK-950 (main component: isothiazoline type) manufactured by Daiwa Kagaku Kogyo Co., Ltd., which is an organic antibacterial agent, is printed on the opposite surface by 1-2 μm. Then, a pattern was printed thereon with an M, C, Y, or BK ultraviolet curable ink containing 1% of Amorden SK-950.

Finally, an ultraviolet-curing type O which contains 1% of an inorganic antibacterial agent, Sagi's apasider (main component: silver hydroxyapatite), is added to the printing surface and the magnetic surface.
A P varnish was printed by 1 to 2 μm to obtain a magnetic card on which an antibacterial outermost layer was formed.

Comparative Example 1 A magnetic card obtained in the same manner as in Example 1 except that the outermost layer was treated with an antibacterial agent and the other inner layers were manufactured under the same conditions except that the antibacterial agent was not used. Used as

Comparative Example 2 A magnetic card obtained in the same manner as in Example 1 except that all layers were not subjected to antibacterial treatment was used as Comparative Example 2.

(Comparative Example 3) A magnetic card obtained in the same manner as in Example 2 except that the antibacterial agent treatment was applied only to the outermost layer, except that the manufacturing conditions of the other inner layers did not include the antibacterial agent. Was used as Comparative Example 3.

Comparative Example 4 A magnetic card obtained in the same manner as in Example 2 except that all layers were not treated with an antibacterial agent was used as Comparative Example 4.

The magnetic cards obtained in Examples 1 and 2 and Comparative Examples 1 to 4 were combined with a reader / writer for 10 minutes.
When a 2,000 pass durability test was performed, a scratched card was obtained by rubbing with a head, a roller guide, or the like. An antibacterial test was performed on the cards before and after the durability test.

The card after the durability test was subjected to an antibacterial test on the flawed portion. The antibacterial activity test was carried out by the Society for the Study of Silver and Other Inorganic Antibacterial Agents, “Voluntary Standards and Antibacterial Test Methods for Silver and Other Inorganic Antibacterial Agents, Antibacterial Test Method I (19
1995 version) Film adhesion method ”, and inoculate yellow erythrocytes and Escherichia coli, and check the viable cell count at 35 ° C. × 24 hours. Table 1 shows the results.

[0032]

[Table 1]

From Table 1, it is obvious that Comparative Examples 2 and 4 without any antibacterial treatment showed no antibacterial activity before and after the durability test. In Comparative Examples 1 and 3, in which only the outermost layer was subjected to the antibacterial treatment, antibacterial activity was observed before the durability test, but the antibacterial activity was lost in the case where a flaw was formed after the test. All the inner layers other than the non-magnetic substrate and the outermost layer subjected to the antibacterial treatment exhibited antibacterial activity before and after the durability test.

In this example, the method of applying the antibacterial agent is a method in which the antibacterial agent is directly dispersed. However, by encapsulating it in a capsule or the like and dispersing it, the manufacturing conditions can be relaxed and the effect can be reduced for a long time. Can be

[0035]

As described above, according to the present invention,
By applying antibacterial treatment to at least one of the inner layers, an antibacterial magnetic card which does not lose its antibacterial activity even when rubbed by a leader or the like and can be manufactured at low cost can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of a magnetic card according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Non-magnetic base 2 Magnetic layer 3 Hiding layer 4, 7 Protective layer 5 Printing underlayer 6 Picture printing layer

Claims (1)

[Claims] 1. A magnetic card having at least one magnetic layer on a non-magnetic substrate, wherein an outermost layer, a non-magnetic substrate,
A magnetic card, wherein at least one of the inner layers such as a magnetic layer, a concealing layer, a printing underlayer, a picture printing layer, and a protective layer has been subjected to antibacterial treatment.