JPH10334426A - Magnetic head cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify cleaning work and to avoid damaging of a magnetic head by using a mixture composed of branched particulates and binder as a cleaner for the magnetic head and making it possible to well remove stains as the branched particulates have the spaces to capture dust, oil-components, etc. SOLUTION: Soft materials, such as melamine resins, benzoguanamine resins, urea resins which are thermosetting resins, and acrylonitrile-butadiene-styrene copolymer resins which are thermoplastic resins, etc., for suppressing head wear to hold the particles and fixed the particles onto a base material are used. The branch particles are, for example, aluminum oxide, formed by bonding and growing of the particles to each other. A wiping effect and the shape of the binder are assured by specifying the ratio of the branched particulates to 0.05 to 50% of the binder. The branched particulates may be the branched particulates formed by aggregation of spherical can bar-shaped particulates and are used by fixing the mixture composed of the binder.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head cleaner capable of removing dirt from a part which dislikes dust and dirt such as a magnetic head and suppressing head wear.

[0002]

2. Description of the Related Art In general, dirt adhering to a magnetic head is not only general dirt such as dust and dirt, but also low-molecular-weight organic compounds which are cleaning agents used in the manufacturing process of a magnetic head, and hand dirt. There is oil like hand oil by touching. As a magnetic head cleaner that can remove these dirt,
Particles having an average particle size of 0.1 to 3 μm (aluminum oxide,
Chromium oxide, silicon carbide, zirconium oxide,
Diamond head) as an abrasive, and a mixture with a binder (a solution obtained by dissolving a saturated polyester resin in a mixed solvent of toluene, xylene, ethyl acetate, and methyl ethyl ketone, and further adding an isocyanate compound curing agent) to an abrasive layer. Cleaning tapes are known.

[0003]

Although these conventional cleaners remove dirt by polishing particles, the dirt removal ability is insufficient because the particles have insufficient adsorbing power to dirt molecules. there were. When wiping the head with a cleaner, the particles have a shape that is hardly deformed by external force, such as a sphere, rod, regular tetrahedron, regular hexahedron, etc. Between the head and the head, the head wears out, causing errors during reading / recording and head damage.

[0004]

That is, the present invention provides a magnetic head cleaner comprising a mixture of branched fine particles and a binder.

[0005] The binder retains the particles and adheres to the substrate, and examples thereof include a thermosetting resin and a thermoplastic resin. As the thermosetting resin, melamine resin,
Benzoguanamine resin, urea resin, polyurethane resin,
Epoxy resin, diallyl phthalate resin, phenolic resin, unsaturated polyester resin, bismaleimide / triazine resin, alkyd resin, etc. are listed, and as the thermoplastic resin, acrylonitrile / styrene copolymer resin, acrylonitrile / chlorinated polyethylene / styrene copolymer Resin, ethylene / vinyl acetate copolymer resin, ethylene / vinyl alcohol copolymer resin, acrylonitrile / butadiene / styrene copolymer resin, vinyl chloride resin, chlorinated polyethylene resin, cellulose acetate resin, fluororesin, polyacetal resin, polyamide resin, poly Arylate resin, aromatic polyester resin, polyetheretherketone resin, polyethersulfone resin, polyethylene resin, polypropylene resin, polyethyleneterephthalate resin, polycarbonate Resin, polystyrene resin, polyphenylene ether resin, polyphenylene sulfide resin, polybutadiene resin, polybutylene terephthalate resin, methacrylic resin, ionomer resin, ethylene / ethyl acrylate copolymer resin, acrylonitrile / acrylic rubber / styrene resin, and the like. They can be used alone or in combination. In these resins, it is preferable to use a soft material to suppress head wear.

It is presumed that the branched fine particles are formed by the colloidal particles being bonded to each other and growing. Specific examples include aluminum oxide, and commercially available products include colloidal alumina, alumina sol-100 and alumina sol-200 (Nissan Chemical Industries, Ltd.)
Manufactured) can be used. Further, spherical and rod-like fine particles such as chromium oxide, silicon carbide, zirconium oxide and titanium oxide may be aggregated to form branched fine particles. The added amount of these branched fine particles is preferably 0.5 to 50% with respect to the binder, and if it is 0.5% or less, the wiping effect is reduced, and if it is 50% or more, the shape of the binder cannot be maintained. There are cases.

[0007] In order to obtain ease of use as a magnetic head cleaner comprising a mixture of the branched fine particles and a binder, the mixture of the branched fine particles and the binder may be fixed to some kind of base material. The substrate can be used by fixing it to fibers, yarns, fabrics, papers, etc., and the method of fixing the mixture to the support is a method in which the mixture is dissolved or suspended in an appropriate solvent, applied and impregnated. Alternatively, a method in which the mixture is melted by heating is applied and impregnated. In addition, the mixture alone may be shaped according to the purpose (rod,
(Plate, tape, fibrous, etc.).

[0008]

The branched fine particles contained in the binder have a space for trapping dust, dirt, oil and the like due to their shape, and can remove dirt satisfactorily. In addition, the branched fine particles have flexibility due to their shape, and the particles are less likely to polish the head when the head is rubbed, so that wear of the head can be suppressed.

[0009]

Embodiments will be described below. Example 1 Saivinol M- which is a polyvinyl acetate emulsion
Alumina sol-200 (Nissan Chemical Industries, Ltd.), which is a branched fine particle, is added to 100 g of 501 (manufactured by Seiden Chemical Co., Ltd.).
Was added and stirred and mixed. In this suspension,
After soaking a cotton thread with an outer diameter of 0.84 mm, the hole diameter is 0.82 mm.
The slurry was passed through a metal nozzle having a length of 8 mm and a length of 8 mm to smooth the surface and to keep the suspension amount constant. After that, the mixture was left in a hot air circulation type degreasing furnace at 100 ° C. for 30 minutes to evaporate water, fix a mixture of polyvinyl acetate and alumina on the cotton yarn surface, and cut the mixture to 70 mm.
A magnetic head cleaner sample was obtained.

Examples 2 to 5 The amount of alumina sol-200 in Example 1 was 24 g,
Samples of Examples 2 to 6 were obtained in the same manner as in Example 1 except that the amounts were 120 g, 240 g, and 485 g.

Comparative Example 1 Saivinol M- which is a polyvinyl acetate emulsion
4.8 g of zirconia sol NZS-20A (manufactured by Nissan Chemical Industries, Ltd.), which is a spherical zirconia oxide, was added to 100 g of 501 (manufactured by Seiden Chemical Co., Ltd.) and mixed with stirring.
A cotton thread having an outer diameter of 0.84 mm is immersed in the suspension, and then passed through a metal nozzle having a hole diameter of 0.82 mm and a length of 8 mm to smooth the surface and maintain a constant amount of the suspension. I tried to be. After that, 1 hot air circulation type degreasing furnace
The mixture was allowed to stand at 00 ° C. for 30 minutes to evaporate the water, fix a mixture of polyvinyl acetate and zirconia on the cotton yarn surface,
It was cut to 0 mm to obtain a magnetic head cleaner sample.

Comparative Example 2 Saivinol M- which is a polyvinyl acetate emulsion
To 100 g of 501 (manufactured by Seiden Chemical Co., Ltd.), 4.8 g of alumina sol-520 (manufactured by Nissan Chemical Industries, Ltd.), which is a spherical aluminum oxide, was added and mixed with stirring. After immersing a cotton thread having an outer diameter of 0.84 mm in this suspension, the suspension was passed through a metal nozzle having a hole diameter of 0.82 mm and a length of 8 mm.
The surface was smoothed and the amount of suspension retained was kept constant. Thereafter, the mixture was allowed to stand in a hot air circulation type degreasing furnace at 100 ° C. for 30 minutes to evaporate water, fix a mixture of polyvinyl acetate and aluminum oxide on the surface of the cotton yarn, and fix the mixture to 70 mm.
To obtain a magnetic head cleaner sample.

[0013]

The above-mentioned Examples 1 to 5 and Comparative Example 1
The following tests were performed on Comparative Example 2. Table 1 shows the results
Shown in

Dirt wiping test KF96-50 which is a silicone oil on a stainless steel plate
1 μl (manufactured by Shin-Etsu Chemical Co., Ltd.) was dropped and used as a substitute for dirt. The weight (the removal rate) of the dirt removed by wiping was shown based on the weight after wiping with the samples of the examples and comparative examples. . The values are average values of 20 samples.

Scratch test The samples of the examples and comparative examples were reciprocated on a stainless steel plate.
The surface roughness after rubbing 0 times was measured by a surface roughness profile measuring machine, Surfcom 475A (manufactured by Tokyo Seimitsu Co., Ltd.). The length of the measurement range is based on 0.8 mm.
The maximum value of the protrusions in 8 mm was determined. Standard length 0.8m
m is sampled at five points, and the average value is taken as the surface roughness (R
tm). The value of the surface roughness of the stainless steel plate before friction was Rtm (1) = 1.21 (μm). or,
The value before friction (Rtm (1)) and the value after friction (Rtm (1))
The difference from (2)) was expressed as a percentage of the value before friction (Rtm (1)), and was taken as the damage rate.

[0016]

[Table 1]

As described above, the magnetic head cleaner of the present invention can be easily cleaned, hardly damages the magnetic head, and can sufficiently remove dirt.

Claims (1)

[Claims] 1. A magnetic head cleaner comprising a mixture of branched fine particles and a binder.