Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Including a second component containing structurally defined...
Patent
1991-07-08
1992-09-22
Thibodeau, Paul J.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Including a second component containing structurally defined...
428336, 4284259, 428694, 428329, 428900, G11B 2300
Patent
active
051495856
ABSTRACT:
A magnetic recording medium is disclosed, which is improved in electromagnetic conversion properties. The recording medium comprises a support, an uppermost magnetic mayer being provided on the support and one or more lower magnetic layers being provided between the support and the uppermost magnetic layer, in which the uppermost magnetic layer comprises a binder and a hexagonal magnetic powder and has a layer thickness of from 0.1 .mu.m to 1.0 .mu.m, and at least one of the lower magnetic layer comprises a binder having a anionic functional group and a magnetic powder, and has a coercive force of from 500 Oe to 1200 Oe, and the uppermost magnetic layer and the lower layer were formed on the support by wet-on-wet simultaneous multi-layer coating.
REFERENCES:
patent: 4643941 (1987-02-01), Miyoshi et al.
patent: 4851289 (1989-07-01), Ogawa et al.
patent: 4865924 (1989-09-01), Saito et al.
patent: 4911997 (1990-03-01), Asai et al.
Goto Narito
Sasaki Kunitsuna
Sekiguchi Nobuyuki
Takeda Katsuyuki
Bierman Jordan B.
Kiliman Leszek
Konica Corporation
Thibodeau Paul J.
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