JPS59127228A - Magnetic card - Google Patents

Abstract

PURPOSE:To obtain a magnetic card having excellent antistatic charging and slipping characteristics with respect to the magnetic card to be used for personnel management (attendance) or parts control by contg. a phenylenediamide deriv. of the specific formula for a conductive layer. CONSTITUTION:The embodiment of a phenylenediamide deriv. is exemplified by m-phenylenediamine-bisstearic acid amide, m-phenylenediamine bispalmiticamide, m-phenylenediamine-bislauricamide, m-phenylenediamine bismyristicamide, etc. The amt. of the phenylenediamine deriv. to be added is preferably about 0.5- 10wt% by the weight of a conductive material, and if the amt. to be added is small, the effect for a slipping property is not enough and if it exceeds 10wt%, the strength of the conductive layer decreases, making the durability of the magnetic card insufficient. The conductive layer is formed simply by dissolving a resin binder in an org. solvent, mixing and dispersing a conductive material such as a conductive pigment with and in the soln., adding further the phenylenediamine deriv. of the formula thereto, dispersing uniformly the mixture to form a dispersion, coating such dispersion on a base and drying the coating.

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a magnetic cart used for personnel management (attendance/attendance) or parts management, etc. Conventional technology Magnetic carts used for personnel management (attendance/attendance) or parts management, etc. are arranged in large numbers at once. Since it is used in a method in which a large number of koji molds are piled up and sequentially sent to the reading unit, its qualities include flatness (no curling), dimensional stability, durability, antistatic property, and mouldability.

If antistatic properties are not sufficient, static electricity will be generated due to friction between the magnetic cart phase or between the magnetic cart and the magnetic card transport member, and errors will occur due to the adhesion of dust and the like. In addition, if the cutting properties are not good, the feeding to the reading section will be insufficient, and when aligning all at once, it will be difficult to align the end faces, making handling inconvenient.

Conventionally known magnetic carts include ones made of plus deck no 1 or tree 1iM 7JI 1 piece of high-quality paper with a few mi 1/11 tape attached to it, but anti-static I
E-ability and slipperiness are not sufficient. Japanese Patent Publication No. 57-1949 discloses a self-excited floating type NF flexible 11J image recording magnetic sheet in which a magnetic layer is provided on the surface of plastic varnish and a central layer is provided on the back surface. Since the size is severely restricted, it cannot withstand use as a magnetic cart for personnel management or parts management, and slipperiness is not taken into consideration. Japanese Utility Model Application Publication No. 52-84103 discloses a magnetic cart having a magnetic layer on one side of the heel and a vapor-deposited film of a conductive metal material on the other side, but manufacturing by vapor deposition is inconvenient; Also, the slipperiness is not sufficient.

Purpose: Antistatic and slippery properties, especially! The purpose is to provide a magnetic card with excellent sliding properties.

In a magnetic cart in which a magnetic layer is provided on one side of a constituent support and a conductive layer mainly composed of a conductive material and a resin binder is provided on the other side, a phenylene of the following general formula is used in the conductive +/1 layer. The present invention is a magnetic cart characterized in that it contains a carbon amide dielectric material.

(R, R' represents a carkyl group having 11 to 19 carbon atoms)
It has been discovered that a magnetic card with excellent sliding properties can be produced by using a phenyle7-noamide derivative of the general formula J, and the present invention has been achieved.

Those with It, R' carbon numbers of 11 to 19 show particularly excellent effects on sliding properties, and those with carbon numbers of 10 or more or 20 or more 1. The slip effect of these is insufficient.

Specific examples of the phenylenediamine I derivatives of the present invention include in-phenylenenoamine-bisstearic acid amide, m-phenylenenoamine bisbalmitic acid amide, lo-1-phenylene7noamino-bislauric acid amide, n-phenylenenoamine-bisvalmitic acid amide,
Examples include l-phenylene/diaminohistinoic acid amide and the like.

The additive B of the funilenonamide derivative is preferably about 0.5 to 10% by weight based on the conductive material; if the amount added is too small, the lubricity effect will not be sufficient, and if it exceeds 10% by weight, the conductivity will deteriorate. The strength of the layer is reduced and the durability of the magnetic cart is sufficient.

To form a conductive layer, a resin binder is dissolved in an organic solvent, a conductive material such as an electrocardiographic pigment is mixed and dispersed, and then a phenylene noamide derivative is added to ensure uniform dispersion. The resulting dispersion may be coated on a support and dried. Examples of the resin binder include polyhinyl chloride polyhinyl acetate, polyhinyl chloride heptachloride polyhinyl acetate co-merged,
Examples include a copolymer of hinyl chloride and hinyl chloride, acrylic resin, epochino resin, and urethane resin. Examples of conductive materials H include carhop rack, graphite, conductive oxidation-resistant deku/conductive zinc oxide, and the like. Examples of organic solvents include methyl ethyl tite/, acet/,
Examples include methyl isobutyl tite 7, and toluene.

The thickness of the conductive layer is preferably about 2 .mu.n to 10''4 m, and the surface resistance is preferably 10 Ω or less.

As the support, a plastic sheet such as polyethylene terephthalate, cellulose acetate, nylon, polycarbonate, or resin-treated high-quality paper is used. Fillers such as inorganic pigments may be added to plastic notebooks in order to improve the rigidity of the notebook and the adhesion to the magnetic layer or conductive layer.

The thickness of the support is preferably 50 μm or more because it is necessary to prevent curling during the manufacturing process or use, since curling of the magnetic cart may cause gills. 250μm due to cost
up to a certain extent is appropriate.

The magnetic layer can be those used in conventional magnetic carts, magnetic tapes, magnetic flexible disks, etc.
is formed as follows.

r-Fc　O, Cor-r-Fc　O, Fe　0　.

23 23 311Cr O
21F e , Co cap metal, i'e-(,',o-
Magnetic particles such as N + alloy powder are mixed with high-grade fats such as palmitic acid and stearic acid! lW, and 1lit fatty acid amide, 17i, Na, K, lvlg': Polyvinyl chloride, polyvinyl 1I11 acid, polychloride by the action of dispersants such as da gold sub-soap, phosphoric acid esters, and def/def. Vinylidene or other copolymers, acrylic resin,
Epoquin resin, urethane resin, etc. are mixed together during the process, and if necessary, lubricants such as licorice oil, chilled fatty acid, etc., and antistatic agents such as carboc black are added.
The coating material for forming the M layer is coated on the support and dried for a while.

The thickness of the magnetic layer is preferably about 2 μm to 20 μm, and the surface resistance is preferably 10 Ω or less.

Effect The dynamic frictional resistance of the conductive layer surface is small, and the sliding properties between the magnetic carts are excellent, even when the magnetic carts are arranged all at once or when a large number of carts are stacked and sent one after another.6 Example (1) Magnetic)/Single layer formation ], Cheng-FeO 231009 Palmitinoic acid amine 05
g methyl ethyl keto 7
100g torue /
50
g After thoroughly dispersing and mixing the above prescription solution in a ball mill filled with steel holes of 35 to 5 diameter, Colloid 3o41 ([1 piece polyurethane Xiang J product) 509+f
ffi was added and mixed and filtered through a 1071m filter to obtain a coating solution. Polyester film 180μm, ]21c
A magnetic layer was formed by uniformly coating and drying using a doctor plate and sufficiently curing reaction, and the thickness of the magnetic layer was 10/1 m.

(2) Conductive layer forming process Carbo Black
309m-Phenyle7 Noami/Histearinoic acid amide 1g Polyurethane (Product name Niraporan 2
304) 159 methyl ethyl ketone
507 The above formulation solution was mixed and dispersed in a whole mill pot for about 10 hours to form a 10μm
It was filtered through a filter to obtain a dispersion liquid for forming a conductive layer. This was coated uniformly on the back side of the support on which the magnetic layer was formed in Section 1 (1) using a doctor flade so that the coating thickness after drying was 5 μm, and dried to carry out a sufficient curing reaction. A magnetic cart (A) was created.

For comparison, a magnetic cart (B) was prepared using the same formulation and process as in (1) and (2j) above, except that In-phenylene/amidium/hisstearamide was not added in 1. (2). It was created.

Magnetic carts (5) and (13) created as above
+ Regarding the IC, the dynamic frictional resistance of the conductive layer was determined as ff1l+, and the results were as shown in the table below.

Measurement method: Resistance value when a sapphire needle with a tip radius of 1.2 wI- is moved horizontally at a speed of 50 wn/min while applying weight and perpendicular to the surface of the conductive layer (
The resistance applied to the needle was measured.

In addition, since the friction of the conductive outer coating film was measured, the load level was selected so that the coating film would not wear out and would not affect the abrasion resistance.

As is clear from this measurement, the dynamic frictional resistance of the conductive layer in the magnetic cart of the present invention is about/approximately that of the comparative product.

Also, when I put a large number of magnetic cars F (A) and (n separately) and aligned them all at once,
(5) Magnetic-jJ-1・1・Yo (Compared to the Bl magnetic cart, it was possible to align the end faces extremely easily.

Claims (1)

[Scope of Claims] A magnetic cart in which a magnetic layer is provided on one side of a support and a conductive layer mainly composed of a conductive material and a resin binder is provided on the other side, the conductive layer having the following: A magnetic card characterized by containing a phenylene/amide derivative of the general formula (R, R' represents an alkyl group having 11 to 19 carbon atoms)