Polyester film for magnetic recording medium

Details Polyester film for magnetic recording medium Polyester film for magnetic recording medium

1983-10-28

1985-10-22

Robinson, Ellis P.

Stock material or miscellaneous articles

Structurally defined web or sheet

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

360134, 428141, 428145, 428149, 428152, 428201, 428216, 428336, 428447, 428480, 428694, 428900, 428323, 428329, 428330, 428331, G11B 570

Patent

active

045488550

ABSTRACT:
Disclosed is a polyester film for a magnetic recording medium, which is comprised of a polyester film, a discontinuous film layer or layers adhering closely to one surface or both the surfaces of the polyester film, and fine particles present in the discontinuous film layer or layers and on the or each surface of the discontinuous film layer or layers, or on the exposed surface or surfaces of the polyester film in the portions where the discontinuous film layer or layers are not present. The discontinuous film layer or layers have a thickness of not larger than 500 angstroms and are composed mainly of a water-soluble polymer.

REFERENCES:
patent: 4106948 (1978-08-01), Cooper
patent: 4198458 (1980-04-01), Mitsuishi
patent: 4233352 (1980-11-01), Ono
patent: 4348446 (1982-09-01), Mitsuishi
patent: 4367262 (1983-01-01), Vaughn
patent: 4489117 (1984-12-01), Ono

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