JPH0127488B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing magnetic cards, and more particularly to a method for manufacturing magnetic cards with excellent stackability.

Magnetic cards are widely used in bank cash cards, ID cards for identification, commuter passes and tickets, language practice cards, etc. Magnetic cards are magnetic cards made by providing a magnetic layer on the surface of a base material such as plastic or paper. There are those that are bonded with tape, and those that are bonded by transferring a magnetic layer provided on a removable substrate. Among these magnetic cards, bank cash cards and the like are made by providing a magnetic layer on a relatively thick plastic board, and then embedding the magnetic layer into the plastic board using a heat press, so that the entire plastic board becomes flat. There are some things that are processed like that. However, although this flattening method is effective for magnetic cards based on relatively thick plastic sheets that are easily deformed by heat, it is effective for magnetic cards based on thin sheets of plastic or paper, or those with poor thermoplasticity or magnetic properties. In magnetic cards whose base material is a material that requires a great deal of heat and pressure to embed the layer, it is almost impossible to embed the layer by heat pressing, and it is difficult for the magnetic layer to protrude onto a flat base material. This is unavoidable, and when stacking cards with such unevenly distributed magnetic layers, the magnetic cards cannot be stacked in parallel, resulting in tilting, which of course makes manual handling troublesome.
This poses a problem in automation of supply and discharge in printing and input/output, and also requires special boxes or packaging materials for packaging each fixed quantity.

In order to overcome the above-mentioned drawbacks of magnetic cards, a magnetic card has been proposed in which the height of the protruding magnetic layer is approximately the same as that of the magnetic card (Japanese Patent Application Laid-Open No. 56-61038). Such processing can be performed using methods such as embossing, vapor deposition, and plating, but when embossing or embossing methods are used, a mold is required, and the thickness of the base material and the protruding height of the magnetic layer are Due to the need to change the mold,
Vapor deposition and plating require complicated separate processes, and it takes a long time to process the thickness to match the protruding height of the magnetic layer using such methods, which avoids disadvantages such as too slow production speed. It's something that doesn't exist.

In addition, a method has been proposed in which printing corresponds to the protruding height of the magnetic layer (Japanese Unexamined Patent Application Publication No. 1983-1999)
-61040 Publication), when performing such processing only by printing, the thickness of the base material, the protruding height of the magnetic layer, the solid content of the ink used for processing, the viscoelasticity of the ink during printing, and the printing plate. Clogging and abrasion during printing cause variations in the thickness of the printed coating, which are also disadvantageous.

The inventors of the present invention have attempted to solve the above-mentioned drawbacks of the conventional methods, and have found that the transfer method using a transfer sheet is superior to other methods such as printing and pasting methods when forming a magnetic layer in a normal magnetic card. Focusing on the fact that there is little variation in the thickness of the magnetic layer formed by
As a result of our research, we have succeeded in overcoming the drawbacks of conventional methods by adopting the structure described in the claims section.

The present invention will be explained in detail below using the drawings.

The base material 1 of the magnetic card may be a plastic film or sheet such as nylon, cellulose diacetate, cellulose triacetate, polystyrene, polyethylene, polypropylene, polyester, polyimide or polycarbonate, metal such as copper or aluminum, paper, impregnated paper, or any of the above. Composites of each material can be used, and even other materials can provide the strength, rigidity, and
Any material can be used as long as it has hiding properties, light-opaque properties, etc. FIG. 2 shows an example of a state in which a magnetic layer 2 and a protruding layer 3 are provided on a composite base material 1', in which the front and back surfaces of a light-opaque sheet 11 are covered with concealing sheets 12 and 12'. For example, a plastic sheet kneaded with a large amount of carbon as the light-opaque sheet 11, a concealing sheet 1, etc.
2 and 12' are preferably made of plastic sheets into which a large amount of titanium white is kneaded.By having such a structure, it is possible to block light rays, and the appearance is hidden by white, which is preferable.

Next, the transfer sheet A as illustrated in FIG. 3 for forming the magnetic layer 2 and the protrusion layer 3 on the base material 1 will be explained next. Vinyl film, polyvinylidene chloride film, polyvinyl alcohol film,
Films or sheets of polyethylene terephthalate film, polycarbonate film, nylon film, polystyrene film, ethylene vinyl acetate copolymer film, ethylene vinyl alcohol copolymer film, ionomer, etc.
Paper or metal foil can be used as is, a composite thereof, or a material provided with a peelable layer. For example, the peelable layer can be prepared by using a suitable vehicle as a solvent,
It may be applied by a known printing method or painting method using a paint made by kneading it with a diluent, or a paint made by adding silicone or wax to these paints, and as a vehicle, ethyl cellulose, ethyl hydroxyethyl cellulose, etc. , cellulose derivatives such as cellulose acetate brobionate, cellulose acetate, polystyrene, poly(a)
Styrene resins such as methylstyrene and styrene copolymer resins, acrylic or methacrylic resins alone or copolymer resins such as polymethyl methacrylate, polyethyl methacrylate, polyethyl acrylate, and polybutyl acrylate, rosin, rosin-modified malein Acid resin, rosin modified phenolic resin, rosin ester resin such as polymerized rosin, polyvinyl acetate resin, coumaron resin, vinyl toluene resin,
Using one or more of vinyl chloride resin, polyester resin, polyurethane resin, butyral resin, polyamide resin, vinyl chloride-vinyl acetate copolymer resin, gravure coating, roll coating, air knife coating, kiss coating, spray coating,
Coating methods such as continuous coating, dip coating, spinner coating, wheeler coating, brush coating and silk screen solid coating, gravure printing, gravure offset printing, lithographic offset printing, dilithography, letterpress printing, intaglio printing, jet printing and silk printing. It may be provided by a printing method such as screen printing.

Alternatively, the peelable layer may be formed by melting and extruding a resin.

Next, the method of providing the magnetic layer 2 on the removable substrate as described above will be described. As the magnetic layer, a known magnetic coating material such as butyral resin, vinyl chloride-vinyl acetate copolymer resin, urethane resin, polyester resin, A resin such as a cellulose resin, an acrylic resin, or a styrene-maleic acid copolymer resin is used as the vehicle, and a rubber resin such as nitrile rubber is used as a plasticizer.
A mixture of various elastomers such as urethane elastomer is used as the magnetic material, for example,
γ-Fe ₂ O ₃ , Co-containing Fe ₂ O ₃ , Fe ₃ O ₄ , barium ferrite, strontium ferrite, Co.
Using a material appropriately selected from Ni, Fe, Cr alone or an alloy, a rare earth Co magnetic material, CrO ₂ , MnA1, etc., in addition to the above vehicles and magnetic materials, surfactants, silane coupling agents, A plasticizer, wax, silicone oil, carbon or other pigments are added as necessary, and the product is kneaded using a three-roll mill, sand mill, ball mill, etc., and the method described above is used as a known printing method or coating method. It is often formed in a stripe shape, but it may also be in a shape other than a stripe.

Next, the method for forming the protruding layer 3 on the removable substrate will be described. The protruding layer 3 can be formed by a known printing method or painting method using a paint containing an appropriate resin as a vehicle. as,
It is possible to use the paint used to form the above-mentioned peelable layer without silicone, wax, etc., or the magnetic paint used to form the above-mentioned magnetic layer without the magnetic material, etc. For example, when forming two magnetic layers in the form of stripes, the magnetic paint may be used as is.

The magnetic layer 2 and the protruding layer 3 may be provided in separate steps, or may be provided separately on separate removable substrates 4' and 4'' as shown in FIGS. 4 and 5.
Alternatively, the same printing roll, painting roll, etc. may be used to supply the magnetic paint and the paint for forming the protrusion layer, and the magnetic layer and the protrusion layer may be simultaneously formed on the same releasable substrate. In particular, both layers may be made to have the same thickness. Since printing conditions can be made common during formation, variations are reduced and the number of steps is also reduced, which is preferable.

Further, the protrusion layer may be provided in a stripe shape, other shapes, or in a pattern, or may be formed in a Braille shape by utilizing the protrusion.

Transfer sheet A is essentially formed as described above, but in addition, a known protective layer is provided between the releasable substrate and the magnetic layer, or between the releasable substrate and the protrusion layer to protect the magnetic layer and the protrusion layer after transfer. Such a protective layer may be provided by using a paint with a suitable vehicle,
The thickness is usually 1 to 10 μm so as not to deteriorate the magnetic properties.

Further, an adhesive layer may be further provided on the surface of the magnetic layer and protrusion layer formed on the transfer sheet to provide adhesion during transfer. Considering adhesive properties, vinyl chloride/vinyl acetate copolymer, ethylene/vinyl acetate copolymer, vinyl chloride/propionic acid copolymer,
Rubber resins, cyanoacrylate resins, cellulose resins, ionomer resins, polyolefin copolymers, etc. can be used as appropriate.

The transfer sheet produced as described above is cut into required dimensions if necessary, and brought into contact with the above-described base material such that the magnetic layer and protrusion layer side formed on the transfer sheet are in contact with the base material, The magnetic layer and the protruding layer are transferred by applying heat and pressure, and the removable substrate is peeled off to obtain a magnetic card.

Specifically, one of the gold rolls or rubber rolls.
Either the pair is placed facing each other, one roll is heated and brought into contact with the transfer sheet, and the pressure between the rolls and the heat of the roll are used to heat and press the roll.
Alternatively, it may be carried out using a hot press. Transfer conditions vary depending on the material used, but for example, the temperature is 100℃ to 300℃, the pressure is about 10Kg/cm for the heat roll method, and the pressure for the heat press method is about 10Kg/cm.
Appropriate speed is around 10Kg/cm ² and 50m/min.

The present invention is essentially as described above, but
In addition, the magnetic card may be subjected to appropriate printing and pre-treatment for printing, such as anchor coating, painting, and protective coating on the front and back sides. These layers may be applied before or after the magnetic layer and/or the magnetic layer and/or the magnetic layer.
Alternatively, when provided overlappingly with a protruding layer, the thickness of each layer may be adjusted so that the final sum of the thicknesses of the magnetic layer and the protruding layer are substantially equal.

In FIG. 6, a magnetic layer 2 and a protruding layer 3 are provided on a base material 1' similar to that in FIG. 2, and an anchor coat layer 5,
A state in which a printed layer 6 and a protective layer 7 are provided is illustrated.

Since the present invention has the above-described configuration, it can be carried out without requiring any special equipment by using a transfer sheet, which is a normal manufacturing method for magnetic cards, and can be manufactured with extremely high efficiency. It is possible. Furthermore, compared to the process of forming the protrusion layer in a separate process from the process of forming the magnetic layer on the magnetic card, variations in thickness can be reduced because the process can be performed more often in the same process. In addition, since heat and pressure are used for transfer, slight variations in the magnetic layer and protrusion layer on the transfer sheet can be corrected, and variations in thickness, such as when the protrusion layer is simply provided by printing, are reduced. The surface of the protruding layer is a uniform surface formed by the surface of the removable substrate, and there is no problem in appearance or in operation in a terminal device, and the present invention as described above The magnetic card obtained by the manufacturing method is particularly suitable for fields in which the card is used in large quantities or in the field where it is disposable.

Examples for explaining the present invention more specifically are listed below.

Example: A coating mainly composed of cellulose acetate vehicle was used on the entire surface of a 38 μm thick polyester film, and a peeling layer was thickened with a gravure printing coat.
A layer having a thickness of 0.6 .mu.m was formed, and a layer to be a protective layer after transfer was formed on the entire surface by the same method as above using a paint mainly composed of a polyvinyl butyral vehicle.

Next, a magnetic layer was formed using a magnetic paint mainly composed of γ-Fe ₂ O ₃ and a vinyl chloride-vinyl acetate copolymer vehicle.
A protrusion layer was formed using a paint containing PVC-Vinyl acetate copolymer as a vehicle to a thickness of 6 μm using a gravure method, and then layered on top of the magnetic layer and the protrusion layer made of PVC-Vinyl acetate copolymer resin. A transfer sheet was prepared by forming a heat-sealable adhesive layer with a thickness of 4 μm using paint.

An anchor coating agent containing a silane coupling agent was applied to the surface of the obtained transfer sheet, which is a milky white polyester sheet with a thickness of 250 μm, to form an anchor coat layer, and then a pair of heated rolls was used to roll the sheet at a temperature of 200°C and a linear pressure. Transfer was carried out at 10 kg/cm and a speed of 50 m/min to obtain a magnetic card.

The magnetic cards obtained did not tilt even when 1000 cards were stacked, and there were no problems with insertion into terminals or automatic transportation.

[Brief explanation of drawings]

Figure 1 shows one embodiment of the present invention, Figure 2 shows another example using a composite base material, Figures 3 to 5 show transfer sheets used in the present invention, and Figure 6 shows various types of composite base materials. FIG. 3 is a schematic cross-sectional view showing a state in which processing has been performed. 1...Base material, 2...Magnetic layer, 3...Protrusion layer, 4
... Peelable substrate, A ... Transfer sheet, 5 ... Anchor coat layer, 6 ... Printing layer, 7 ... Protective layer.

Claims (1)

[Claims] 1. A method for producing a magnetic card, which comprises transferring a magnetic layer and a protruding layer provided on the surface of a releasable substrate to a substrate.