Biaxially oriented polyester films

Details Biaxially oriented polyester films Biaxially oriented polyester films

1982-05-20

1983-12-20

Schofer, Joseph L.

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...

2642356, C08K 510

Patent

active

044218877

ABSTRACT:
A biaxially oriented polyester film composed of a polyester composition comprising (A) 100 parts by weight of a substantially linear polyalkylene terephthalate having ethylene terephthalate as a main structural component, (B) 0.01 to 5 parts by weight of an ester of an aliphatic polyol having at least 4 hydroxyl groups in the molecule with an aliphatic monocarboxylic acid having at least 8 carbon atoms, and (C) not more than 0.8 part by weight of fine inorganic particles having an average particle diameter of not more than about 1 micron and being substantially insoluble in the polyalkylene terephthalate. The aforesaid biaxially oriented polyester film is useful as a base of magnetic tapes.

REFERENCES:
patent: 3516957 (1970-06-01), Gray, Jr. et al.
patent: 4093695 (1978-06-01), Heirbaut

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