Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1984-07-03

1986-09-30

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, 360134, 360135, 360136, 427128, 427131, 428522, 4284259, 428694, 428695, 428900, G11B 570

Patent

active

046146873

ABSTRACT:
A magnetic recording medium which comprises a plastic base film and a magnetic layer formed on one side of the base film and composed of ferromagnetic alloy powder dispersed in a resin binder, characterized in that said ferromagnetic alloy powder has a surface area of at least 48 m.sup.2 /g as measured by BDT 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 a thermoset backing layer having a surface roughness of from 0.05 to 0.6 .mu.m is formed on the other side of the base film, the backing layer being made of a thermosetting resin composition comprising a vinyl chloride-vinyl acetate-vinyl alcohol copolymer, a polyurethane resin and a polyisocyanate.

REFERENCES:
patent: 4439486 (1984-03-01), Yamada
patent: 4452863 (1984-06-01), Takizawa
patent: 4455345 (1984-06-01), Miyatuka
patent: 4537833 (1985-08-01), Kasuga
patent: 4547419 (1985-10-01), Nishimatsu
patent: 4555431 (1985-11-01), Miyatsuka
patent: 4560617 (1985-12-01), Nishimatsu
patent: 4567083 (1986-01-01), Arioka

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