Rough biaxially oriented polyester film for use in capacitors

Details Rough biaxially oriented polyester film for use in capacitors Rough biaxially oriented polyester film for use in capacitors

1997-02-25

1999-02-23

Michl, Paul R.

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...

2642902, 428480, 524430, 524447, B29C 5500

Patent

active

058744967

ABSTRACT:
The invention relates to a biaxially oriented polyester film having a roughness, on at least one film surface, of R.sub.z greater than 1.0 .mu.m (Ra is greater than 0.1 .mu.m), a dielectric strength (AC) greater than 220 kV/mm (the DC dielectric strength is greater than 500 kV/mm) and a migrating fraction in the film of less than 18 .mu.S/cm based on a mass of added particles in a polyester volume of 100 cm.sup.3. The film is particularly suitable for oil-impregnated capacitors.

REFERENCES:
patent: 3980611 (1976-09-01), Anderson et al.
patent: 4590119 (1986-05-01), Kawakami
patent: 4595715 (1986-06-01), Kuze
patent: 4603073 (1986-07-01), Renalls
patent: 4654249 (1987-03-01), Barbey
patent: 4761327 (1988-08-01), Hamano
patent: 5164439 (1992-11-01), Sakamoto
patent: 5352534 (1994-10-01), Hamano
patent: 5380577 (1995-01-01), Hamano
patent: 5409657 (1995-04-01), Gerwig
patent: 5434000 (1995-07-01), Konagaya
patent: 5470637 (1995-11-01), Sakamoto
Abstract--JP-A-03 197 136 Toray Ind. Inc. (27.12.89).
Abstract--JP-A-63 141 308 Teijin KK (04.12.86).
Abstract--JPA-03 246 814 Diafoil KK (23.02.90).
Abstract--JP-A-63 72 531 Tokkyo Koho (02 Apr. 1988).
Abstract--J5 5158-619 Diafoil KK 30/05/79.

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