Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1983-04-29

1985-10-08

Lesmes, George F.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

252 6254, 428329, 428694, 428695, 428900, B32B 516

Patent

active

045460388

ABSTRACT:
A magnetic recording medium is disclosed which is comprised of a non-magnetic support having a magnetic layer provided thereon. The magnetic layer is comprised of two different types of carbon black having different particle sizes, a lubricant which is liquid at room temperature, a ferromagnetic powder all dispersed in a binder. A carbon black (1) has an average particle size smaller than 50 m.mu. and a carbon black (2) has an average particle size of larger than 120 m.mu.. The carbon black is present in a weight ratio of (1)/(2) within the range of 50/50 to 97/3. The magnetic recording medium has improved electromagnetic properties and running durability. In addition, the material provides an improved S/N ratio and an improved coefficient of friction.

REFERENCES:
patent: 3423233 (1969-01-01), Akashi et al.
patent: 4015042 (1977-03-01), Chassaigne
patent: 4135031 (1979-01-01), Akashi et al.
patent: 4275113 (1981-06-01), Saito et al.
patent: 4320159 (1982-03-01), Ogawa et al.
patent: 4388369 (1983-06-01), Tamai et al.
patent: 4474843 (1984-10-01), Miyoshi et al.

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