Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1986-01-15

1987-08-18

Thibodeau, Paul J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

428323, 428329, 428694, 428900, G11B 568, G11B 5708

Patent

active

046877045

ABSTRACT:
A magnetic recording medium such as a video tape comprising a magnetic recording layer which comprises a ferromagnetic metal powder having a specific surface area of not less than 42 m.sup.2 /g and an inorganic material powder having a Mohs' scale of hardness of not less than 5, wherein at least 90 wt. % of said inorganic material powder consists of particles having a particle size of 0.1-0.6 .mu.m, 51-85 wt. % of a portion of said particles consisting of particles having a particle size of less than 0.3 .mu.m, and the residual portion consisting of particles having a particle size of not less than 0.3 .mu.m.

REFERENCES:
patent: 4420408 (1983-12-01), Kajimoto et al.
patent: 4420531 (1983-12-01), Tokuda
patent: 4420532 (1983-12-01), Yamaguchi et al.
patent: 4448842 (1984-05-01), Yamaguchi et al.
patent: 4474848 (1984-10-01), Yamaguchi et al.
patent: 4547419 (1985-10-01), Nishimatsu et al.

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