Electrical insulation film
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United States of America Patent
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Apr 23, 2013
Grant Date -
Jun 3, 2010
app pub date -
May 7, 2008
filing date -
May 8, 2007
priority date (Note) -
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status (Latency Note)
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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.
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