Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1986-01-07

1988-05-10

Thibodeau, Paul J.

Stock material or miscellaneous articles

Structurally defined web or sheet

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

427128, 428694, 428900, G11B 570, G11B 5704

Patent

active

047434872

ABSTRACT:
A magnetic recording medium such as an audio cassette tape or a video cassette tape comprising a flexible nonmagnetic support and a magnetic recording layer which contains a ferromagnetic cobalt-containing iron oxide, in which the nonmagnetic support has a surface of a center line average height in the range of 0.01 to 0.1 .mu.m on both sides and the magnetic recording medium has a heat shrinkage ratio of not higher than 1%, the heat shrinkage ratio being determined after allowing to stand at 110.degree. C. for 4 hours.

REFERENCES:
patent: 4316927 (1982-02-01), Kimura et al.
patent: 4318957 (1982-03-01), Videc
patent: 4481231 (1984-11-01), Hashimoto et al.
patent: 4496626 (1985-01-01), Kasuga et al.
patent: 4505966 (1985-03-01), Adachi et al.
patent: 4550049 (1985-10-01), Ono et al.

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