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Title:
BIAXIALLY STRETCHED POLYPROPYLENE FILM FOR CAPACITOR
Document Type and Number:
WIPO Patent Application WO/2016/051496
Kind Code:
A1
Abstract:
Provided are: a thin biaxially stretched polypropylene film for capacitors, the film having excellent initial voltage resistance and excellent long-term heat resistance and voltage resistance; and said capacitor polypropylene film that has been metallized. The present invention is a polypropylene film for capacitors obtained by biaxially stretching polypropylene resin, wherein the crystallite size determined from the half-width of the α-crystal (040) plane reflection peak measured by wide angle X-ray diffraction using the Scherrer equation is not more than 122 Å, and birefringence ∆Nyz with respect to the thickness direction determined by measuring optical birefringence is 7.0 × 10-3 to 10.0 × 10-3.

Inventors:
NAKATA, Masahiro (7-5 Ginza 4-chome, Chuo-k, Tokyo 61, 〒1040061, JP)
IKEDA, Kazuo (7-5 Ginza 4-chome, Chuo-k, Tokyo 61, 〒1040061, JP)
ISHIWATA, Tadakazu (7-5 Ginza 4-chome, Chuo-k, Tokyo 61, 〒1040061, JP)
KAKEHI, Akihiro (7-5 Ginza 4-chome, Chuo-k, Tokyo 61, 〒1040061, JP)
MATSUO, Yoshinori (12-8, Ginza 5-chome, Chuo-k, Tokyo 61, 〒1040061, JP)
SHISHIDO, Yuichi (12-8, Ginza 5-chome, Chuo-k, Tokyo 61, 〒1040061, JP)
MURASE, Shigeo (12-8, Ginza 5-chome, Chuo-k, Tokyo 61, 〒1040061, JP)
Application Number:
JP2014/076067
Publication Date:
April 07, 2016
Filing Date:
September 30, 2014
Export Citation:
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Assignee:
OJI HOLDINGS CORPORATION (7-5 Ginza 4-Chome, Chuo-Ku Tokyo, 61, 〒1040061, JP)
International Classes:
C08J5/18; B32B27/32; H01G4/18
Domestic Patent References:
WO2013105552A12013-07-18
Foreign References:
JPS59211908A1984-11-30
JPH0370114A1991-03-26
Other References:
See also references of EP 3202825A4
Attorney, Agent or Firm:
SAEGUSA & PARTNERS (Kitahama TNK Building, 1-7-1 Doshomachi, Chuo-ku, Osaka-sh, Osaka 45, 〒5410045, JP)
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