Polyester film for magnetic recording media

Details Polyester film for magnetic recording media Polyester film for magnetic recording media

1989-06-02

1991-04-09

Jacobs, Lewis T.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524425, 428212, 428220, C08K 322

Patent

active

050065890

ABSTRACT:
Disclosed in this invention is a polyester film for magnetic recording media, containing 0.05 to 5% by weight of inactive inorganic particles (A) having a Mohs hardness of 6 or above and an average particle size of 0.005 to 1.0 .mu.m and 0.01 to 2.0% by weight of inactive particles (B) having an average particle size which is greater than that of the particles (A) and in the range of 0.1 to 3.0 .mu.m, the polyester film having an intrinsic viscosity in the range of 0.52 to 0.65. The polyester film of this invention is excellent in abrasion resistance, scuff resistance and slitting qualities and useful as a base film for magnetic recording media.

REFERENCES:
patent: 3821156 (1974-06-01), Farrar
patent: 3884870 (1975-05-01), Dodson et al.
patent: 3980611 (1976-09-01), Anderson et al.
patent: 4546030 (1985-10-01), Minami et al.
Abstract corresponding to JP 55-101136.
Abstract corresponding to JP 55-15860.
Abstract Corresponding to JP 52-78954.
Abstract Corresponding to JP 52-78953.

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