Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1991-06-20

1993-06-01

Thibodeau, Paul J.

Stock material or miscellaneous articles

Composite

Of inorganic material

428323, 428328, 428329, 428336, 428408, 428900, G11B 566, G11B 572, B32B 516

Patent

active

052158330

ABSTRACT:
A magnetic recording medium is disclosed. The medium comprises a non-magnetic support and, provided thereon, plural magnetic layers comprising the uppermost magnetic layer having a thickness of 1.5 .mu.m or less and lower magnetic layers, said plural magnetic layers containing a ferromagnetic powder, a binder and a lubricant, wherein a dynamic friction coefficient of the uppermost layer against a metal pin is 0.25 or less under the condition of a temperature of 20.degree. C. and a relative humidity of 60%, and 0.20 or less under the condition of a temperature of 40.degree. C. and a relative humidity of 20%.

REFERENCES:
patent: 4956220 (1990-09-01), Sueyoshi et al.
patent: 4992330 (1991-02-01), Kawahara et al.
patent: 5001006 (1991-03-01), Saito et al.
patent: 5026598 (1991-06-01), Koyama et al.
patent: 5035856 (1991-07-01), Koyama et al.

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