Biaxially oriented polyester film and process for the preparatio

Details Biaxially oriented polyester film and process for the preparatio Biaxially oriented polyester film and process for the preparatio

1994-09-13

1996-10-29

Thibodeau, Paul

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

428329, 428330, 428480, 428910, 524425, 524430, 524601, 525441, 525443, B32B 516, B32B 2736, B32B 2718, C08K 322

Patent

active

055695329

ABSTRACT:
A biaxially oriented polyester film having improved surface properties, scratch resistance and abrasion resistance comprises the particulate slip agents of a calcium carbonate having an average particle diameter ranging from 0.01 to 3 .mu.m, alumina having an average particle diameter ranging from 0.005 to 3 .mu.m and a Mohs' hardness of 8 or more and a melamine formaldehyde condensate having an average particle diameter ranging from 0.01 to 3 .mu.m, wherein each of the slip agents is in an amount ranging from 0.01 to 4 wt. % based on the weight of the polyester.
The film is useful in manufacturing condensers, medical articles, photographic films, packaging and labelling materials and, particularly, magnetic recording media.

REFERENCES:
patent: 4801640 (1989-01-01), Dallmann et al.
patent: 5006589 (1991-04-01), Sakamoto et al.
patent: 5023291 (1991-06-01), Sakamoto et al.
patent: 5032458 (1991-07-01), Dallmann et al.
patent: 5164439 (1992-11-01), Sakamoto et al.
patent: 5252388 (1993-10-01), Murooka et al.
patent: 5314736 (1994-05-01), Kawaguchi et al.
patent: 5372879 (1994-12-01), Handa et al.

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