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1. (WO2018056404) BIAXIALLY STRETCHED POLYPROPYLENE FILM, METALLIZED FILM FOR CAPACITORS, AND CAPACITOR

Pub. No.:    WO/2018/056404    International Application No.:    PCT/JP2017/034339
Publication Date: Fri Mar 30 01:59:59 CEST 2018 International Filing Date: Sat Sep 23 01:59:59 CEST 2017
IPC: H01G 4/18
C08J 5/18
Applicants: OJI HOLDINGS CORPORATION
王子ホールディングス株式会社
Inventors: TOMINAGA,Takeshi
冨永 剛史
SUEYOSHI,Michiko
末葭 道子
OKUYAMA,Yoshimune
奥山 佳宗
NAKATA,Masahiro
中田 将裕
ISHIWATA,Tadakazu
石渡 忠和
Title: BIAXIALLY STRETCHED POLYPROPYLENE FILM, METALLIZED FILM FOR CAPACITORS, AND CAPACITOR
Abstract:
A biaxially stretched polypropylene film comprising a polypropylene resin and satisfying the following: (a) the crystallite size Sa, which is determined using the Scherrer equation from the full width at half maximum of the α-crystal (040) plane reflection peak as measured by wide-angle x-ray diffraction after treatment for 200 hours at 105°C, is not more than 12.9 nm; and (b) the planar orientation coefficient ΔPa, which is calculated from the birefringence values ΔNyz and ΔNxz with respect to the thickness direction as determined by optical birefringence measurement after treatment for 200 hours at 105°C, is at least 0.013 (where, ΔPa = (ΔNyz + ΔNxz)/2).