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Title:
BIAXIALLY ORIENTED POLYPROPYLENE FILM
Document Type and Number:
WIPO Patent Application WO/2017/170244
Kind Code:
A1
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.

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Inventors:
KINOSHITA OSAMU (JP)
YAMADA KOJI (JP)
Application Number:
PCT/JP2017/012073
Publication Date:
October 05, 2017
Filing Date:
March 24, 2017
Export Citation:
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Assignee:
TOYO BOSEKI (JP)
International Classes:
C08J5/18; B32B27/32
Foreign References:
JP2007508423A2007-04-05
JPS63149149A1988-06-21
JPH06297659A1994-10-25
JP2014055276A2014-03-27
JP2001040111A2001-02-13
US20140121340A12014-05-01
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