Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1989-02-28

1991-03-19

Thibodeau, Paul J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

428329, 428694, 428900, G11B 2300

Patent

active

050010069

ABSTRACT:
A magnetic recording medium is disclosed, comprising a nonmagnetic support having thereon a lower magnetic layer comprising ferromagnetic particles and binders and an upper magnetic layer comprising ferromagnetic particles and binders in this order, wherein the upper magnetic layer contains (a) an abrasive agent having a Mohs' hardness of 6 or more and an average particle diameter of 0.45 .mu.m or more and (b) an abrasive agent having a Mohs' hardness of 6 or more and an average particle diameter of 0.25 .mu.m or less.

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patent: 4643941 (1987-02-01), Miyoshi et al.
patent: 4668568 (1987-05-01), Fujiyama et al.
patent: 4687704 (1987-08-01), Miyashi et al.
patent: 4759979 (1988-07-01), Kasha et al.
patent: 4844946 (1989-07-01), Komatsu et al.
patent: 4865924 (1989-09-01), Saito et al.

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