Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1984-12-12

1987-01-27

Robinson, Ellis P.

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

360134, 360135, 360136, 427 44, 427128, 427131, 428143, 428147, 4284259, 428323, 428522, 428523, 428694, 428900, G11B 572

Patent

active

046393897

ABSTRACT:
A magnetic recording medium comprising a plastic base film, a magnetic layer formed on one side of the base film and a backing layer formed on the other side of the base film, characterized in that said magnetic layer has a surface roughness of at most 0.08 .mu.m, and said backing layer is composed essentially of first particles of an inorganic pigment having an average particle size of from 0.04 to 0.5 .mu.m and a Mohs hardness of from 2 to 4 and second particles of an inorganic pigment having an average particles size of from 0.04 to 0.5 .mu.m and a Mohs hardness of from 5 to 7, dispersed in a thermoset or radiation-cured binder.

REFERENCES:
patent: 4310599 (1982-01-01), Akashi
patent: 4337288 (1982-06-01), Takenaka
patent: 4414270 (1983-11-01), Miyoshi
patent: 4419406 (1983-12-01), Isobe
patent: 4439486 (1984-03-01), Yamada
patent: 4443514 (1984-04-01), Yamamoto
patent: 4451531 (1984-05-01), Isobe
patent: 4465737 (1984-08-01), Miyatuka
patent: 4474843 (1984-10-01), Miyoshi
patent: 4486500 (1984-12-01), Naruo
patent: 4567083 (1986-01-01), Arioka

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