Patent · US Active

Electrical insulation film

US8427810B2 · kind B2 · utility

1Cited by

2References

23Claims

0Family size

Assignee

Borealis Technology Oy · FI

Inventors

Manfred Stadlbauer · Linz, AT
Eberhard Ernst · Linz, AT
Lauri Huhtanen · Loviisa, FI
Yvo Daniels · Zonhoven, BE
Franck Jacobs · Evergem, BE

Key dates

Filing date	May 7, 2008
Grant date	Apr 23, 2013
Priority date	—
Expiry date	Feb 19, 2030

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31938
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to a capacitor film comprising a biaxially oriented polypropylene wherein a) said polypropylene has a draw ratio in machine direction of at least 4.0 and a draw ratio in transverse direction of at least 4.0, and b) said polypropylene has an electrical breakdown strength EB63% according to IEC 60243-part 1 (1988) of at least 300 kV/mm at a draw ratio in machine direction and in transverse direction of 4.0.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.