Biaxially stretched polypropylene film for capacitor, metallized film, and film capacitor

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United States of America Patent

PATENT NO 9991052
SERIAL NO

14112591

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Abstract

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Provided is a biaxially stretched polypropylene film for capacitors which has high withstand voltage characteristics when used as a dielectric for capacitors and which has highly suitable processability into elements. The biaxially stretched polypropylene film for capacitors has projections on both surfaces and has a thickness (t1, μm) of 4-20 μm. When one of the surfaces is expressed by surface A and the other by surface B, all of the following relationships are satisfied. 800≤SRzB≤1,300 (nm) 0.1≤SRzA/SRzB≤0.8 PBmin≥100 (nm) PBmax≤1,500 (nm) 0.4≤PB450-750/PB≤0.7.

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Patent Owner(s)

Patent OwnerAddress
TORAY INDUSTRIES INC1-1 NIHONBASHI-MUROMACHI 2-CHOME CHUO-KU TOKYO 103-8666

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Asano, Tetsuya Tsuchiura, JP 116 540
Nakatsuka, Takanori Tsuchiura, JP 6 28
Sugata, Masami Tsuchiura, JP 23 77

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