Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1992-11-12

1994-08-23

Thibodeau, Paul J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

428329, 428694B, 428694BR, 428694BM, 428694SG, 428480, 428900, B32B 310, B32B 516, G11B 566

Patent

active

053406362

ABSTRACT:
A magnetic recording medium comprising a non-magnetic support having on at least one side thereof at least one magnetic layer, in which the magnetic layer comprises a binder having dispersed therein a ferromagnetic powder and the non-magnetic support has a coarse projection density of not more than 400 per 500 mm.sup.2, a surface roughness (Ra) of from 0.02 to 0.07 .mu.m (cut-off value: 0.25 mm), and a thermal shrinkage of not more than 1.0% when preserved at 100.degree. C. for 4 hours. The magnetic recording medium has satisfactory sensitivity and frequency characteristics, freedom from output variation in the high-frequency region, and excellent running properties at ordinarily temperature and ordinary humidity with a reduced rate of running stop.

REFERENCES:
patent: 4275107 (1981-06-01), Bantkus et al.
patent: 4743487 (1988-05-01), Saito et al.
patent: 4780353 (1988-10-01), Takahashi et al.
patent: 4959263 (1990-09-01), Aonuma et al.
patent: 5051303 (1991-09-01), Noguchi et al.
patent: 5252388 (1993-10-01), Murooko

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