JPS62161594A - Magnetic card with printed layer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic card having a printing layer.

BACKGROUND OF THE INVENTION Magnetic cards, which have a magnetic layer on one side of a plastic substrate and a printable layer on the other side, are currently widely used in commuter passes for automatic ticket gates and other labor-saving applications. When a commuter pass for automatic ticket gates is issued at a station, necessary information such as the boarding section, period of use, and name are printed on the printable layer, and the same data is encoded as a digital signal on the magnetic layer. Record saturation and publish. The issued ticket is
They are usually tied together and used repeatedly through automatic ticket gates.

Therefore, the printing layer of the magnetic cards used for these purposes not only has good printing suitability for each printing method of the issuing machine, but also prevents the printing surface from wearing out or getting dirty even after repeated use after issuing. It is required not to Therefore, at present, many types of magnetic cards are produced, each having a different type of printing layer corresponding to each printing method of the issuing machine. In addition, in recent years, there has been a demand for ink to be printed on the printing layer not only in a single color of black but also in multiple colors. With conventional printing layers, in order to meet the demand for multicolor printing, it is necessary to print in advance using a normal printing method such as offset printing or gravure printing at the stage of producing magnetic cards.

Problems to be Solved by the Invention As in the past, as the printing methods of issuing machines differ, it is necessary to prepare a magnetic card with a printing layer suitable for the printing method, or printing must be performed during the production of the magnetic card. As a result, not only does plate making and printing incur costs, but there is also the problem that it is not possible to adequately meet the demand for printing different contents on each magnetic card. The printed layer of the magnetic card did not have sufficient durability against repeated use in terms of the abrasion resistance of the printed surface.

An object of the present invention is to provide a magnetic card having a printing layer that eliminates such conventional problems.

Means for Solving the Problems According to the present invention, in a magnetic card having a magnetic layer and a printing layer on a non-magnetic substrate, the printing layer is made of porous finely powdered silica and a nitrocellulose-urethane thermosetting resin. It is formed from a mixture of fine particles and saturated polyester resin.

Embodiments Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The attached drawing is a partially enlarged sectional view of a magnetic card as an embodiment of the present invention, and the magnetic card of this embodiment has a magnetic layer 2 and its protective layer 3 on one side of a non-magnetic substrate 1 such as plastic or paper. It has a printing layer 4 on the opposite side. This printing layer 4 is made of nitrocellulose-urethane thermosetting resin fine particles 5 and porous fine powder silica 2.
It is formed of a mixture of secondary particles 6 and saturated polyester resin (including voids) 7.

To explain one example of a method for producing such a magnetic card, first, a saturated polyester resin is dissolved in a liquid in which fine particles of a nitrocellulose-urethane thermosetting resin are swollen and dispersed in a solvent, and then a gel of silicic acid is dissolved. A coating material for a printing layer is prepared by dispersing porous fine powder silica produced by a chemical method. Next, a magnetic layer is applied to one side of a non-magnetic substrate such as plastic or paper, and the above-mentioned printing layer paint is applied to the opposite side of the substrate.Then, the magnetic card is punched out to the desired size. can get.

Next, considering the main effects of each component in the printing layer of the magnetic card according to the present invention, first of all, saturated polyester resin has excellent permeability of sublimable dyes (when heated) and adhesiveness to the polyester base. ing. The nitrocellulose-urethane thermosetting resin fine particles are mainly effective in improving the abrasion resistance of the printed surface, but in combination with the saturated polyester resin, they greatly improve the practical adhesion. Porous fine powder silica is produced by gelation of silicic acid, has secondary particles of approximately 2 μm or more, and has approximately IQ
It is composed of primary particles of nm size and pores of about 2Q nm. The size of the secondary particles is related to the surface roughness of the coating film,
Affects the adhesion of thermal transfer paper and influences the resolution of printing. Moreover, the approximately 200 m pores are thought to allow various ink solvents and low-molecular-weight molecules to pass through. Furthermore, the voids between the silica primary particles in the printing layer allow the pigment and polymer binder of the ink to pass through, but if the amount of silica blended is too small, no voids are formed.

When a sample was created by blending the above three types of materials, it was found that when the content of nitrocellulose-urethane thermosetting resin fine particles was 5% by weight or less, the coating film was weak <30ff.
At fffi% or higher, the permeability of all inks was poor. Furthermore, if the silica content is less than 20% by weight, the permeability of various inks except sublimation dye inks will be poor, resulting in
When the weight was 1% or more, the surface of the printed layer was easily stained. For sublimable dyes, if the silica content is less than 20% by weight, the surface of the printed layer will be too glossy and the image will become blurred (if the content is more than 40% by weight, the printed layer will whiten and the image will become blurred). The color saturation has decreased.

Next, a specific example of manufacturing a magnetic card having a printed layer according to the present invention will be described.

Nitrocellulose-FM-20020 (1 part by weight contains 25% trocellulose, manufactured by Daicel Chemical Industries KK) Niraporan N-31135ml 1 part (contains 20% urethane nidistomer, manufactured by Nippon Polyurethane Industries KK) Coronate HL 1 part by weight (incyanate type) Curing agent (manufactured by Nippon Polyurethane Industries KK) Methyl ethyl ketone A mixture containing 74 parts by weight or more was heat-treated at 60°C for 740 hours to obtain a pudding-like gel (swollen body). Furthermore, methyl ethyl ketone 100x II was added and the mixture was fed under pressure through a nominally 3 μm cartridge filter to obtain a gel dispersion of nitrocellulose-urethane thermosetting resin fine particles. Byron 200 25-ton-ja (saturated polyester resin, manufactured by Toyobo KK) was added to this liquid and dissolved for 1 hour using a blade-type stirrer. Furthermore, 15 parts by weight of Thyroid 150 (porous fine powder silica with a secondary particle size of 2 to 3 μm, manufactured by Fuji Davison Chemical KK) was added and dispersed for 1 hour using a blade-type stirrer to obtain a coating liquid for the printing layer. Ta.

This coating solution was coated with a roll coater on the opposite side of the polyester (PET) base coated with the magnetic layer with a thickness of about 0.2 mm to a dry thickness of about 12 μm.
It was dried for 1 minute and punched out to the size of a magnetic commuter pass to obtain a magnetic card with a printed layer.

Good effects were obtained on this magnetic card when text and pictures were printed using the following printing methods: electrophotographic transfer method, melting type thermal transfer method, impact dot printing method, inkjet method, and sublimation type thermal transfer method.

Further, even after the printed magnetic card was repeatedly run 1,000 times using an automatic ticket gate, the printed surface remained good.

Effects of the Invention According to the present invention, a magnetic card having a printing layer compatible with various types of printing contents including durable multi-color printing can be produced in a simple process in various magnetic card issuing machines such as commuter pass issuing machines. This will reduce the cost of issuing magnetic cards.

In addition, the printing layer of the magnetic card according to the present invention does not require printing in advance, and predetermined characters, symbols, etc. can be printed and displayed immediately before issuance, thereby preventing fraud such as counterfeiting of the magnetic card. At the same time, the cost of securities management to prevent fraud can be reduced.

Furthermore, since the printing layer according to the present invention is compatible with any printing method, it is only necessary to prepare a magnetic card having only one type of printing layer, and the types of magnetic cards can be unified, and card production and It is advantageous compared to conventional products in terms of delivery time and cost.

[Brief explanation of drawings]

The accompanying drawing is a partially enlarged sectional view of a magnetic card as an embodiment of the present invention. 1...Nonmagnetic substrate, 2...Magnetic layer,
3...Protective layer, 4...Printing layer, 5.
...Nitrocellulose-urethane type M curable resin fine particles, 6... Porous fine powder silica secondary particles, 7...
...Saturated polyester resin.

Claims (3)

[Claims] (1) In a magnetic card having a magnetic layer and a printed layer on a non-magnetic substrate, the printed layer is formed of a mixture of porous fine powder silica, nitrocellulose-urethane thermosetting resin fine particles, and saturated polyester resin. A magnetic card characterized by: (2) The content of the porous fine powder silica in the mixture is 20 to 40% by weight.
Magnetic cards listed in ). (3) The content of the nitrocellulose-urethane thermosetting resin fine particles in the mixture is 5 to 30% by weight.
A magnetic card according to claim (1) or (2).