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Patent Searching and Data


Title:
POLYPROPYLENE FILM AND FILM CAPACITOR
Document Type and Number:
WIPO Patent Application WO/2016/043217
Kind Code:
A1
Abstract:
A polypropylene film wherein, a percentage (125R%) calculated by measuring the dielectric breakdown voltage (V/μm) of the film at 30 points in a 125°C atmosphere, and dividing the difference between the maximum value and the minimum value among 20 points obtained by respectively excluding the 5 points having the greatest breakdown voltage and the 5 points having the lowest, by the average value of these 20 points is less than 50%; and a percentage (23R%) calculated by measuring the dielectric breakdown voltage (V/μm) of the film at 30 points in a 23°C atmosphere, and dividing the difference between the maximum value and the minimum value among 20 points obtained by respectively excluding the 5 points having the greatest breakdown voltage and the 5 points having the lowest, by the average value of these 20 points is less than 20%. The present invention relates to a polypropylene film having few insulation defects and minimal variance of dielectric breakdown voltage in high-temperature environments, and in particular there is provided a polypropylene film that exhibits high withstand voltage and reliability in high-voltage capacitor applications.

Inventors:
IMANISHI, Yasuyuki (Toray Industries Inc., 1-1, Sonoyama 1-chome, Otsu-sh, Shiga 58, 〒5208558, JP)
OHKURA, Masatoshi (Toray Industries Inc., 1-1, Sonoyama 1-chome, Otsu-sh, Shiga 58, 〒5208558, JP)
OKADA, Kazuma (Toray Industries Inc., 1-1, Sonoyama 1-chome, Otsu-sh, Shiga 58, 〒5208558, JP)
KUMA, Takuya (Toray Industries Inc., 1-1, Sonoyama 1-chome, Otsu-sh, Shiga 58, 〒5208558, JP)
Application Number:
JP2015/076278
Publication Date:
March 24, 2016
Filing Date:
September 16, 2015
Export Citation:
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Assignee:
TORAY INDUSTRIES, INC. (1-1 Nihonbashi-Muromachi 2-chome, Chuo-ku Tokyo, 66, 〒1038666, JP)
International Classes:
C08J5/18; B32B27/32; C08L23/12; H01B3/00; H01B3/44; H01G4/18
Domestic Patent References:
WO2012002123A12012-01-05
WO2014148547A12014-09-25
Foreign References:
JPH11246683A1999-09-14
JP2004161799A2004-06-10
JP2001250738A2001-09-14
JPS59191207A1984-10-30
JPH04163042A1992-06-08
JP2014205799A2014-10-30
JP2015201616A2015-11-12
Other References:
See also references of EP 3196234A4
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