Polypropylene film, metal layer laminated film using polypropylene film, and film capacitor

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United States of America Patent

PATENT NO 12202958
APP PUB NO 20220135780A1
SERIAL NO

17431589

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Provided are a polypropylene film that has excellent structural stability relative to heat, is suitable for use in high-voltage capacitors or the like, and, when used in a high-voltage capacitor, has excellent long-term reliability in high-temperature environments; a metal layer laminated film that uses the polypropylene film; and a film capacitor. The polypropylene film has the sum of F5 values for the longitudinal direction and the width direction at 130° C. of at least 15 MPa and, for dielectric breakdown testing at 130° C., a dielectric breakdown voltage (B150) (V/μm) after heat treating for 1 minute at 150° C. and a dielectric breakdown voltage (B0) (V/μm) without heat treating satisfy the following relationship.

description='In-line Formulae' end='lead'(B150)/(B0)≥0.80description='In-line Formulae' end='tail'

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Patent Owner(s)

Patent OwnerAddress
TORAY INDUSTRIES INC1-1 NIHONBASHI-MUROMACHI 2-CHOME CHUO-KU TOKYO 1038666 ?1038666

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Imanishi, Yasuyuki Otsu, JP 16 27
Nakanishi, Yuta Otsu, JP 17 15
Ohkura, Masatoshi Otsu, JP 38 246

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