JPH052854A - Magtnetic recording medium - Google Patents

Abstract

PURPOSE:To allow the application of this recording medium to a thermal printer which uses wax fusion type ink ribbon and resin fusion type ink ribbon, respectively. CONSTITUTION:A thermosensitive layer 3 of the magnetic recording medium provided with the thermosensitive layer 3 on one surface of a base material 1 consists of a compd. formed by compounding spherical org. solid particles into a synthetic resin component. The compounding ratio of a binder component and the org. solid particles is within a 1:1 to 1:4 range by weight.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a form in which a magnetic recording layer for magnetically recording predetermined information is provided on one surface of a substrate and a heat-sensitive layer for forming a visible pattern is provided on the other surface. The present invention relates to a magnetic recording medium. The magnetic recording medium of the present invention is particularly suitable for, for example, a ticket or a commuter ticket for an automatic ticket gate.

[0002]

2. Description of the Related Art Conventional magnetic recording media of this type are roughly classified into two types, that is, one using high-quality paper as a base material and one using a synthetic resin such as polyester. Predetermined information is magnetically recorded on the magnetic recording layer of the medium as well, and desired characters and the like are printed by a thermal recording mechanism including a thermal head and an ink ribbon.
An ink ribbon of a wax melting type is used for the one using a paper base material. When the ink ribbon is pressed against the surface of the paper base material by the thermal head in a heated state, the ink held therein is melted and penetrates into the base material to form an image. The one using paper has the advantages that the ink absorbability is good and that it can be applied to stamps such as a cancellation mark.

On the other hand, since the type using a synthetic resin as a base material does not absorb ink, a heat sensitive layer is provided on the surface of the base material to enable printing by a heat sensitive recording mechanism, and the resin melting type ink is used. Ribbon is used. This heat-sensitive layer is indispensable for ensuring good printing quality by closely adhering to the resin of the ink ribbon when the thermal head is pressure-bonded via the resin-melting type ink ribbon.

[0004]

The one using a paper base material is advantageous in terms of ink absorption, but since it produces fine dust, it is not suitable for an automatic ticket gate. is there. On the other hand, the one using a synthetic resin base material is most suitable for an automatic ticket gate because it does not generate dust, but it is difficult to print with a normal stamp or the like. That is, the conventional thermal recording medium has advantages and disadvantages whether the base material is paper or synthetic resin. More importantly, the wax-melting type ink ribbon applied to the paper-based heat-sensitive recording medium cannot be applied to the synthetic resin-based heat-sensitive recording medium, and the resin-melting type ink ribbon cannot be applied to the paper-based recording medium. Clear printing cannot be performed on the thermal recording medium.

An object of the present invention is magnetic recording, which has excellent adaptability to both wax melt type ink ribbons and resin melt type ink ribbons, and is capable of writing or printing with water-based or oil-based inks. It is to provide a medium.

[0006]

The magnetic recording medium according to the present invention is a magnetic recording medium in which a thermosensitive layer is provided on one surface of a substrate, and the thermosensitive layer is a synthetic resin component mixed with spherical organic solid particles. It is characterized by comprising a blend, and the blending ratio of the binder component and the organic solid particles is within the range of 1: 1 to 1: 4 by weight.

More specifically, in the present invention, the heat-sensitive layer is a resin generally used in ordinary magnetic recording media for printing using a resin-melting type ink ribbon,
For example, it is composed of a compound in which spherical organic solid particles are mixed with a binder component prepared by dissolving a polyester resin, an epoxy resin, a butyral resin, etc. in a suitable solvent. In this specification, "spherical organic solid particles" means fine organic solid particles having a spherical shape or a shape close thereto, preferably 0.2 µm to 10 µm, more preferably 1 µm to 4 µm. It is a thing. In the present invention, the organic solid particles need to be a material insoluble in the solvent contained in the binder component. Preferred examples of such organic solid particles include organic pigments composed of powders of melamine resin, polyurethane resin, styrene resin, silicone resin, benzoguanamine and the like. As an example, powders such as benzoguanamine (trade name "Eposter MS") commercially available from Nippon Shokubai Co., Ltd., and silicone resin powder (trade name "Trefil E-730S") manufactured by Toray Dow Corning Silicone Co., Ltd., etc. There is.

The inorganic pigment particles have poor compatibility with the binder component, and it is difficult to disperse them uniformly.

These spherical organic solid particles are blended in a desired blending ratio with respect to the binder component, coated on the surface of the substrate by a conventional means to a desired thickness, and then dried.
As the binder, generally commercially available polyester resin or polyurethane resin can be advantageously used. For example, product name "Vylon 20SS" manufactured by Toyobo Co., Ltd. (30% solution obtained by diluting polyester resin with MEK / toluene (80:20)) and product name "N-2301" manufactured by Nippon Polyurethane Co., Ltd. ( Polyurethane resin diluted with MEK / toluene (1: 1) 4
0% solution) can be used. If necessary, these may be further diluted before use.

In the present invention, the blending ratio of the binder component and the organic solid particles is extremely important, and it has been found from the results of experiments that the weight ratio must be within the range of 1: 1 to 1: 4. did. If the blending ratio of the binder component and the organic solid particles is less than 1: 1, the printability of the wax-melting type ink ribbon and the stamp becomes insufficient and the fixing property of the ink becomes insufficient, so that the ink flows from the surface. There is a drawback that it will be lost, making it impractical. On the other hand, when it exceeds 1: 4, the coating strength of the heat-sensitive layer is lowered and desired durability cannot be obtained. And this compounding ratio does not depend on the resin used, the material of the organic solid particles, and the particle size of the organic solid particles.

This formulation is applied by methods commonly used in the manufacture of magnetic recording media, such as reverse roll coating, and then dried to form the heat sensitive layer. There is no particular limitation on the thickness of the heat-sensitive layer, but as with a normal heat-sensitive layer, 2
A range of -30 μm, preferably 5-15 μm is suitable.

The magnetic recording medium of the present invention having such a heat sensitive layer has a high affinity for the resin ink component in a molten state transferred from the resin melt type ink ribbon, so that It is possible to print with high quality by an ordinary thermal printer that uses an ink ribbon, and because of the high permeability of organic solid particles dispersed in the heat-sensitive layer, a thermal printer that uses a wax-melting ink ribbon. Also, good printing can be performed.

It is also possible to previously print on the heat-sensitive layer a tint block pattern for improving the appearance of the card, or notes for using the card, and perform the above-mentioned printing on it.

[0014]

【Example】

(Example 1) Binder ("Vylon 20SS") 180 parts by weight Organic solid particles ("Eposter MS": average particle size 2 μm) 160 parts by weight MEK 60 parts by weight Toluene 60 parts by weight Each of the above components was mixed with a high-speed stirrer to about 1 part. Stir for a period of time to uniformly disperse the organic solid particles to prepare a coating liquid, and use this coating liquid on the ordinary coated paper for tickets (on the back surface with magnetic recording for magnetic recording) using the reverse roll method. Layer) and a thickness of 16 g / m ² . After coating, this sheet was dried at 120 ° C. for 1 minute to obtain a magnetic recording medium.

(Example 2) Binder ("N-2301") 200 parts by weight Organic solid particles ("Trefil E-730S": average particle size 2 μm) 160 parts by weight MEK 50 parts by weight Toluene 50 parts by weight Each of the above components Was stirred with a high-speed stirrer for about 1 hour to uniformly disperse the organic solid particles to prepare a coating solution, and the coating solution was applied to a polyester sheet for a regular commuter pass (reverse side) using a reverse roll method with a roll coater. (Having a magnetic layer for magnetic recording) of 18 g / m ² . After coating, this sheet was dried at 120 ° C. for 1 minute to obtain a magnetic recording medium.

The magnetic recording media obtained in Examples 1 and 2 were subjected to a printing test using a wax-melting type and resin-melting type ink ribbon used in a normal ticket issuing apparatus and a commuter ticket issuing apparatus, respectively. ,
Clear prints were formed, and no difference was found in print quality between both magnetic recording media. Further, both magnetic recording media could be printed with a water-based stamp ink.

[0017]

As described above, the magnetic recording medium of the present invention has a good affinity for a resin ink component in a molten state transferred from a resin-melting type ink ribbon and a wax-melting type ink ribbon. It has a high penetrability for the ink transferred from the above. Therefore, it can be directly applied to all types of thermal printers currently used, and it is possible to avoid the great disadvantage of preparing different magnetic recording media for each type. is there.

[Brief description of drawings]

FIG. 1 is a partial vertical cross-sectional view of a magnetic recording medium according to an embodiment of the present invention.

[Explanation of symbols]

1 base material 2 Magnetic recording layer 3 heat sensitive layer 4 Ink penetration part

Claims (3)

[Claims] 1. A magnetic recording medium in which a heat-sensitive layer is provided on one surface of a substrate, wherein the heat-sensitive layer comprises a mixture of a binder component and spherical organic solid particles. Mixing ratio with solid particles is 1: 1 by weight.
A magnetic recording medium characterized by being in the range of ˜1: 4. 2. The magnetic recording medium according to claim 1, wherein the organic solid particles are made of an organic pigment composed of polyester resin, polyurethane resin, styrene resin, silicone resin, or benzoguanamine powder. 3. The organic solid particles have a particle size of 1 μm to 4 μm.
The magnetic recording medium according to claim 1, which is in the range of m.