Stock material or miscellaneous articles – Structurally defined web or sheet – Including components having same physical characteristic in...
Patent
1984-08-01
1986-05-27
Robinson, Ellis P.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including components having same physical characteristic in...
252 6254, 360134, 360135, 360136, 427 44, 427131, 427128, 428323, 428328, 428694, 428900, 428408, G11B 572
Patent
active
045915288
ABSTRACT:
A magnetic recording medium comprising a plastic base film, a magnetic layer formed on one side of the base film and composed of a ferromagnetic alloy powder dispersed in a resin binder, and a backing layer formed on the other side of the base film, characterized in that said ferromagnetic alloy powder has a surface area of at least 48 m.sup.2 /g as measured by BET method, said magnetic layer has a coercive force of at least 1,000 Oe and a surface roughness of at most 0.08 .mu.m, and said backing layer is composed essentially of a thermoset or radiation-cured resin and carbon black dispersed in the resin, and has a surface roughness of from 0.05 to 0.6 .mu.m, said carbon black having an average particle size of from 10 to 60 .mu.m as measured by an electron microscope.
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Arioka Hiroyuki
Ide Toshiaki
Kubota Yuichi
Nishimatsu Masaharu
Saito Yoshiaki
Robinson Ellis P.
TDK Corporation
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