Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1985-02-15

1986-12-30

Robinson, Ellis P.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

252 6254, 427128, 360134, 360135, 360136, 428323, 428694, 428900, G11B 570

Patent

active

046328700

ABSTRACT:
A magnetic recording medium comprising a plastic base of polyester film or the like having a magnetic coat formed on one side, the magnetic coat consisting of a dispersion of a ferromagnetic powder in a resin binder, characterized in that the magnetic coat contains a nonmagnetic composite oxide powder of a spinel structure in an amount of 0.5 to 15% by weight on the basis of the ferromagnetic powder weight. The composite oxide in powder form ranges in particle diameter from 0.1 to 0.7 .mu.m and has a Mohs hardness of not less than 5.

REFERENCES:
patent: 3929658 (1975-12-01), Beske
patent: 4117190 (1978-09-01), Ahashi
patent: 4275115 (1981-06-01), Naruse
patent: 4399189 (1983-08-01), Nakashima

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