Biaxially oriented polyester film containing multilayered cross-

Stock material or miscellaneous articles – Structurally defined web or sheet – Including components having same physical characteristic in...

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428327, 428407, 428480, 428910, B32B 702, B32B 2718

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active

051007193

ABSTRACT:
A biaxially oriented polyester film containing 0.01 to 4 wt % of multilayered high-molecular particles having a weight-average particle size of 0.05 to 3 .mu.m which comprise core crosslinked high-molecular particles having a glass transition temperature of not lower than 100.degree. C. coated with a crosslinked polymer having a glass transition temperature of lower than 100.degree. C., the ratio Dw/Dn of the weight-average particle size (Dw) and the number-average particle size (Dn) being not more than 1.3 is disclosed. The film of the present invention has excellent running property and wear resistance and is useful as a base film for various products such as magnetic recording media, capacitors, photomechanical plates, electric insulators, heat-sensitive transfer film, packaging film, transfer marks and gold and silver threads. Thus, the present invention has a high industrial value.

REFERENCES:
patent: 4568616 (1986-02-01), Seifried et al.
patent: 4746703 (1988-05-01), Dallmann et al.
patent: 5032458 (1991-07-01), Dallmann et al.

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