Polyester film for magnetic recording media

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

1991-06-05

1992-11-17

Michl, Paul R.

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...

524430, C08J 320, C08K 326, C08L 3108

Patent

active

051644398

ABSTRACT:
A biaxially oriented polyester film containing a specific calcium carbonate is described. The calcium carbonate contained in the film is specified by its vaterite form, its average particles size of 0.07 to 1.5 .mu.m, and its particle size distribution ratio of not more than 2.00. The biaxially oriented polyester film containing such specific calcium carbonate is excellent in both the running property and wear resistance, and suitable for the use as a base of magnetic recording media.

REFERENCES:
patent: 4568616 (1986-02-01), Seifried et al.
patent: 4720412 (1988-01-01), Katoh et al.
patent: 4727108 (1988-02-01), Kagiyama et al.
patent: 5006589 (1991-04-01), Sakamoto et al.

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