Magnetic recording medium having improved electromagnetic conver

Details Magnetic recording medium having improved electromagnetic conver Magnetic recording medium having improved electromagnetic conver

1991-04-24

1994-08-30

Thibodeau, Paul J.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428323, 428329, 428694B, 428694BN, 428694BA, 428694BM, B32B 302, B32B 516, G11B 566

Patent

active

053426681

ABSTRACT:
A magnetic recording medium which comprises a support and a magnetic layer formed on opposite sides of the support and comprised of a ferromagnetic fine powder and an non-magnetic powder of an abrasive both dispersed in a resin binder. The non-magnetic powder consists essentially of a first non-magnetic inorganic powder having an average particle size of from 0.01 to 1.0 .mu.m and a second non-magnetic inorganic powder having an arborescent or chain-like structure and an average particle size of from 0.03 to 2.0 .mu.m. The first and second powders is present at a mixing ratio by weight of 8:2 to 2:8.

REFERENCES:
patent: 4015042 (1977-03-01), Chassaigne
patent: 4336308 (1982-06-01), Yamada et al.
patent: 4405481 (1983-09-01), Yamada et al.
patent: 4687704 (1987-08-01), Miyoshi et al.
patent: 5093172 (1992-03-01), Kato et al.

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