JP2002192869A - Magnetic card - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic card having mirror surface-like high luminance metal gloss layer region formed by simpler coating or printing than a metal vapor depositing method and much design properties and a method for manufacturing the same. SOLUTION: The magnetic card comprises the metal gloss layer having the mirror surface-like luminance equivalent to that of an aluminum vapor deposited film at an arbitrary place thereof in a desired shape by coating or printing a high luminance coating agent. The method for manufacturing the magnetic card comprises the steps of forming the metal gloss layer by coating or printing the high luminance coating agent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a magnetic card having a metallic luster area and a method for manufacturing the same.

[0002]

2. Description of the Related Art In recent years, in order to enhance the design of credit cards and prepaid cards, a metallic glossy layer having a metallic feeling has been provided on the entire surface of the card. Common methods for providing a metallic gloss layer used for these purposes include a method of applying or printing a metallic coating agent or metallic ink, and a method of performing metal deposition. The former coating or printing method can easily and inexpensively form the metallic glossy layer region. In the method described above, only a matte metallic luster could be obtained. In the latter metal vapor deposition method, a mirror-like metallic luster can be obtained, but on the other hand, the process is complicated, the productivity is low, and the production cost is high because a dedicated device is required. Also, in order to partially provide the metallic gloss layer region, not the entire surface, a method in which a water-soluble primer layer having a desired shape is provided as a mask, and after the aluminum deposition, the aluminum-deposited layer is removed together with the water-soluble primer layer with running water, By using a method that removes the aluminum deposition layer with an aqueous sodium hydroxide solution, hydrogen fluoride, etc., by masking it with a chemical resistant primer or ink, an aluminum deposition pattern having a desired shape and metallic luster is formed at any position. Required a more complicated process.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic layer having a mirror-like high-brightness metallic luster layer formed by coating or printing, which is simpler than a metal vapor deposition method, and which is rich in design. An object of the present invention is to provide a card and a method for manufacturing the card.

[0004]

Means for Solving the Problems The present inventors applied a high-brightness coating agent or printed it to form a metallic gloss layer having a mirror-like brightness equivalent to that of an aluminum vapor-deposited film at an arbitrary position on a magnetic card. In addition, they found that they can be formed in a desired shape, and solved the above-mentioned problems. That is, the present invention provides a magnetic card having a metallic gloss layer region formed by applying or printing a high-brightness coating agent. Further, the present invention provides a method for manufacturing a magnetic card in which a metallic luster layer region is formed by applying a high brightness coating agent. Hereinafter, the magnetic card and the method of manufacturing the same according to the present invention will be described in detail.

[0005] 1. High Brightness Coating Agent The high brightness coating agent used in the present invention comprises a thin metal film strip, a binder resin, an additive, and a solvent. Normally, metal powder is used for the metallic coating agent, but when a metal thin film is used, the metal thin film is oriented in a direction parallel to the surface of the workpiece when the coating agent is applied. Thus, a high-luminance mirror-like metallic luster that cannot be obtained with conventional metal powders can be obtained.

1) Metal thin film strip The metal of the metal thin film strip is aluminum, gold, silver,
Copper, brass, titanium, chromium, nickel, nickel chrome, stainless steel and the like can be used. As a method of forming a metal into a thin film, in the case of a metal having a low melting point such as aluminum, aluminum, gold, silver, copper or the like having a malleable foil, in the case of a metal having a high melting point and having no malleability, , Sputtering and the like. The thickness of the metal thin film is preferably from 0.01 to 0.1 μm, more preferably from 0.03 to 0.08 μm. The size in the plane direction of the metal thin film strip dispersed in the coating agent is
5 to 25 μm is preferred, and more preferably 10 to 15 μm.
μm. When the size is less than 5 μm, the luminance of the coating film becomes insufficient, and when it exceeds 25 μm, the metal thin film strips are less likely to be oriented, so that the luminance is reduced. When a high-brightness coating agent is applied by a gravure method or a screen printing method, it causes clogging of the plate.

Hereinafter, a method for producing a metal thin film strip will be described by taking a vapor deposition method as an example. As the support film on which the metal is deposited, a polyolefin film, a polyester film, or the like can be used. First, after a release layer is provided on a support film by coating, a metal is deposited on the release layer to a predetermined thickness. A top coat layer is applied to the surface of the deposited film to prevent oxidation. The same coating agent can be used for the release layer and the top coat layer.

[0008] The resin used for the release layer or the top coat layer is not particularly limited. Specific examples include cellulose derivatives, acrylic resins, vinyl resins, polyamides, polyesters, EVA resins, chlorinated polypropylenes, chlorinated EVA resins, and petroleum resins. Examples of the solvent include aromatic hydrocarbons such as toluene and xylene, aliphatic or alicyclic hydrocarbons such as n-hexane and cyclohexane, esters such as ethyl acetate and propyl acetate, methanol, ethanol, isopropyl alcohol and the like. Alcohols, ketones such as acetone and methyl ethyl ketone, and alkylene glycol monoalkyl ethers such as ethylene glycol monoethyl ether and propylene glycol monomethyl ether can be used.

The above-mentioned metal-deposited film is immersed in a solvent for dissolving the release layer and the top coat layer and stirred, and the metal-deposited film is peeled off from the support film. Filter to about 150 μm, filter and dry. The solvent is not particularly limited except that it dissolves the resin used for the release layer or the top coat layer. When a metal thin film is formed by sputtering, a metal thin film strip can be formed in the same manner as described above. When a metal foil is used, it may be pulverized to a predetermined size with a stirrer as it is in a solvent.

[0010] The metal thin film strip is preferably subjected to a surface treatment in order to enhance dispersibility in a high-brightness coating agent. As surface treatment agents, stearic acid, oleic acid,
Examples thereof include organic fatty acids such as palmitic acid, methylsilyl isocyanate, nitrocellulose, cellulose derivatives such as cellulose acetate propionate, cellulose acetate butyrate, and ethyl cellulose, which are adsorbed on the surface of the metal thin film strip by a commonly used method.

2) Binder Resin As the binder resin, those commonly used in conventional paints, gravure inks, flexo inks, screen inks and the like can be used. Specifically, for example,
(Meth) acrylic resin, polyester, polyamide, polyurethane, urea resin, melamine resin, epoxy resin,
Rosin-modified maleic resin, petroleum resin, polystyrene, styrene-maleic resin, shellac, alkyd resin and the like can be mentioned.

3) Additives Various additives used in conventional paints, gravure inks, flexographic inks, screen inks and the like can be used for the high-brightness coating agent of the present invention, if necessary. . Such additives include coloring pigments, dyes, waxes, plasticizers, leveling agents, surfactants, dispersants, defoamers, chelating agents and the like.

4) Solvent The solvent used in the high-brightness coating agent of the present invention is also
Known and commonly used solvents used in conventional paints, gravure inks, flexographic inks, screen inks and the like can be used. Specifically, for example, aromatic hydrocarbons such as toluene and xylene, aliphatic or alicyclic hydrocarbons such as n-hexane and cyclohexane, esters such as ethyl acetate and propyl acetate, methanol, ethanol, isopropyl alcohol and the like Alcohols, ketones such as acetone and methyl ethyl ketone, and alkylene glycol monoalkyl ethers such as ethylene glycol monoethyl ether and propylene glycol monomethyl ether.

5) Method of adjusting high-brightness coating agent Generally, in order to stably disperse the ingredients of the coating agent, pigments and other additives are prepared by milling using a roll mill, a ball mill, a bead mill, or a sand mill. Into submicron particles. However, in the high-brightness coating agent of the present invention, the metal thin film pieces to be blended in order to express the metallic luster require a size of 5 to 25 μm, and when the above-mentioned kneading is performed, the metal thin film pieces are fine particles. And the metallic luster is extremely reduced.
Therefore, in the present invention, the coating material is simply mixed with the above-mentioned compounding raw materials without mixing. For that purpose, it is preferable to subject the metal thin film to surface treatment as described above for the purpose of improving dispersibility.

2. Magnetic Card The magnetic card can be prepared by a known and commonly used method disclosed in Japanese Patent Application Laid-Open No. 53-65799. An ordinary magnetic card has a configuration in which an oversheet (1) including an adhesive layer, a magnetic recording layer, a concealing layer (coloring layer), a printing layer, a protective layer, and the like is provided on one side of a core sheet of polyvinyl chloride or the like. An oversheet (2) composed of an adhesive layer, a printing layer and the like is laminated on the surface. Over seat (1)
Are often formed by thermal transfer. In the magnetic card of the present invention, a metallic luster layer is formed in the print layer by applying or printing a high-brightness coating agent. If necessary, the printing layer may be formed on the core sheet instead of the oversheet. Since the high-brightness coating agent of the present invention has a high hiding power, it can be used for a hiding layer.

As a coating method, a usual coating method such as roll coating, gravure coating, curtain coating, spray coating, die coating and the like can be mentioned. In addition to these, one of the major features of the present invention is that a printing method such as gravure printing, flexographic printing, or screen printing can be used. When providing a metallic gloss layer on the entire surface of the magnetic card, a coater may be used. In the coating by the printing method, since a plate is used, it is possible not only to apply the entire surface but also to create a partial metallic having an arbitrary pattern formed at an arbitrary place. In the case of gravure printing, the metallic gloss of the metallic gloss layer can have a continuous tone, and a photographic image or gradation can be expressed. Therefore, if the high-brightness coating agent of the present invention is used, it can be used not only for hiding the magnetic recording layer but also for decorative purposes by designing the pattern of the high-brightness coating agent.

[0017]

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples. Unless otherwise specified, parts and% represent parts by mass and% by mass, respectively.

<Preparation of High Brightness Coating Agent> 1) Aluminum Thin Film Strip Nitrocellulose (HIG7) was dissolved in a mixed solvent of ethyl acetate: isopropyl alcohol = 6: 4 to form a 6% solution. The solution was applied on a polyester film using a gravure plate having a screen ruling of 175 lines / inch and a cell depth of 25 μm to form a release layer. After drying sufficiently,
Aluminum is deposited on the release layer to a thickness of 0.04 μm, and the same nitrocellulose solution as used for the release layer is applied to the surface of the deposited film under the same conditions as for the release layer. A layer was formed. The deposited film was immersed in a mixed solvent of ethyl acetate: isopropyl alcohol = 6: 4 to separate the aluminum deposited film from the polyester film, and then the aluminum deposited film was pulverized with a stirrer to a size of about 150 μm. Then, an aluminum thin film strip was prepared.

2) Slurry of aluminum thin film strip Aluminum thin film strip 10 parts Ethyl acetate 35 parts Methyl ethyl ketone 30 parts Isopropyl alcohol 30 parts The above were mixed, and while stirring, 5 parts of a nitrocellulose solution having the following composition were added. Nitrocellulose (HIG1 / 4) 25% Ethyl acetate: isopropyl alcohol = 6: 4 Mixed solvent 75% The above mixture was maintained at a temperature of 35 ° C. or lower using a turbo mixer to reduce the size of aluminum thin film strips. It stirred until it became 10-15 micrometers, and prepared the aluminum thin film strip slurry.

3) High-brightness coating agent Aluminum thin film strip slurry 30 parts Urethane resin (Dai Nippon Ink Chemical's “Haarnock L7-617”) 30 parts Chlorinated polypropylene (Nippon Paper's “Supacron 803M”) 2 parts Polyethylene wax compound 3 parts Mitsui Chemical's “High Wax 210P” 20% Nitrocellulose (HIG7) 10% Ethyl acetate 70% Ethyl acetate 30 parts The above were mixed to prepare a high brightness coating agent.

<Gravure printing plate> The following gravure plate was used to apply a high-brightness coating agent partially or entirely to the oversheet of the magnetic card. Gravure engraving machine: "Heli Gravure Systems"
oKlischograph K500 "Number of screen lines: 175 lines / inch Cell depth: 25 to 30 μm Stylus angle: 120 ° Under the above conditions, a gravure plate having a print pattern and a gravure plate having a solid surface were prepared.

(Example 1) <Magnetic card having a metallic glossy layer region on the entire surface> A high-brightness coating agent is applied to the upper surface of the magnetic recording layer of the oversheet (1) using a gravure solid plate to form a concealing layer. The obtained oversheet (1) was obtained.

Example 2 <Magnetic Card Partially Having Metallic Luster Layer Area> A high-brightness coating agent was applied to a part of the printing layer of the oversheet (1) using a gravure printing plate having a printing pattern. Printing was performed to obtain a partially metallic oversheet (1).
The oversheet (1) produced in Example 1 and Example 2 was laminated on a polyvinyl chloride core sheet by a known method, respectively, to obtain a magnetic card.

[0024]

According to the present invention, a magnetic card having a mirror-like high-brightness metallic glossy layer region which can be conventionally achieved only by aluminum deposition by applying or printing a high-brightness coating agent, and a simple method of manufacturing the same. Provide an inexpensive way. According to the method for manufacturing a magnetic card according to the present invention, the metallic glossy layer region can be formed by applying or printing a high-brightness coating agent instead of the conventional metal vapor deposition method. It can be mass-produced at high speed. In addition, by using the print version,
The metallic luster layer region can be formed at an arbitrary position and in an arbitrary shape, and also has a remarkable effect that the degree of freedom in design design is remarkably improved.

Claims (5)

[Claims] 1. A magnetic card having a metallic glossy layer region formed by applying or printing a high-brightness coating agent. 2. The magnetic card according to claim 1, wherein the high-brightness coating agent contains a binder resin and a metal thin film strip. 3. The magnetic card according to claim 1, wherein the metal thin film is surface-treated with an organic fatty acid, methylsilyl isocyanate, or a cellulose derivative. 4. The magnetic card according to claim 1, wherein the metallic glossy layer region is patterned in an arbitrary shape. 5. A method for manufacturing a magnetic card, wherein a metallic luster layer region is formed by applying or printing a high-brightness coating agent.