Rough electrical insulating film of polypropylene and process fo

Details Rough electrical insulating film of polypropylene and process fo Rough electrical insulating film of polypropylene and process fo

1980-10-10

1983-01-04

Silverman, Stanley S.

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

264176R, 2642101, 2642105, 2642107, 361314, 361323, 427 79, 428141, 428156, 428163, 428164, 428167, 428409, 428461, H01G 418

Patent

active

043675115

ABSTRACT:
Disclosed is a film for use in the field of electrical insulation comprising a biaxially stretched rough polypropylene film comprising a plurality of first zones of high roughness, the first zones having a relatively high number of .alpha.-crystallites; and a plurality of second zones of substantially lesser roughness, the second zones having a substantially lesser number of .alpha.-crystallites than the first zones, the first zones being adjacent to the second zones and the adjacent first and second zones forming fine channels between each other. Also disclosed is a method for producing this film.

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patent: 4287249 (1981-09-01), Eustance et al.

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