Polyester films containing substantially spherical particles use

Details Polyester films containing substantially spherical particles use Polyester films containing substantially spherical particles use

1979-04-06

1981-06-16

Cannon, James C.

Electrical generator or motor structure

Dynamoelectric

Rotary

260 40R, 428480, C08K 336, H02K 334

Patent

active

042740258

ABSTRACT:
Polyester films containing 0.2 to 0.9% by weight of filler particles having a nominal particle size of 2 to 10 .mu.m and a hardness of 2.5 to 7 on the moh scale are suitable for the production of slot liners and closures. The films have improved resistance to fibrillation or delamination and tearing during the formation of the slot liners and closures and improved slip properties to promote their insertion into electrical stators and rotors.

REFERENCES:
patent: 2819173 (1958-01-01), Dithmar
patent: 3201506 (1965-08-01), Bills
patent: 3419460 (1968-12-01), Ure
patent: 3514651 (1970-05-01), Jarrett et al.
patent: 3884870 (1975-05-01), Dodson

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