Polyester substrate for magnetic recording medium having oligome

Details Polyester substrate for magnetic recording medium having oligome Polyester substrate for magnetic recording medium having oligome

1983-07-18

1985-04-30

McCamish, Marion E.

Stock material or miscellaneous articles

Structurally defined web or sheet

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

428147, 428152, 428216, 428218, 428409, 428458, 428694, 428695, 428900, B32B 300, G11B 570

Patent

active

045144516

ABSTRACT:
A magnetic recording media comprises a polyester substrate having 1000/mm.sup.2 or more protrusions of polyester oligomer, and a ferromagnetic thin film of 400 .ANG. or larger thickness both formed on the surface of the polyester substrate; the recording media has substantially no squealing even at 30.degree. C. at over 80% relative humidity.

REFERENCES:
patent: 4233352 (1980-11-01), Ono et al.
patent: 4320207 (1982-03-01), Watanabe et al.
patent: 4348446 (1982-09-01), Mitsuishi et al.
patent: 4439479 (1984-03-01), Kanai et al.

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