Search International and National Patent Collections

1. (WO2017170244) BIAXIALLY ORIENTED POLYPROPYLENE FILM

Pub. No.:    WO/2017/170244    International Application No.:    PCT/JP2017/012073
Publication Date: Fri Oct 06 01:59:59 CEST 2017 International Filing Date: Sat Mar 25 00:59:59 CET 2017
IPC: C08J 5/18
B32B 27/32
Applicants: TOYOBO CO., LTD.
東洋紡株式会社
Inventors: KINOSHITA, Osamu
木下 理
YAMADA, Koji
山田 浩司
Title: BIAXIALLY ORIENTED POLYPROPYLENE FILM
Abstract:
In order to provide a biaxially stretched polypropylene film having higher thermal resistance and rigidity, this biaxially oriented polypropylene film is characterized by: a polypropylene resin constituting the film fulfilling conditions 1)-4); and the lower limit of a plane orientation coefficient for the film being 0.0125. 1) The mesopentad fraction lower limit being 96%. 2) The upper limit for the amount of copolymerized monomers other than propylene being 0.1 mol%. 3) Mass average molecular weight (Mw)/number average molecular weight (Mn) being 3.0-5.4. 4) The melt flow rate (MFR) measured at 230°C and 2.16 kgf being 6.2-9.0 g/10 min.