Title:
BIAXIALLY ORIENTED POLYPROPYLENE FILM
Document Type and Number:
Japanese Patent JP2022111158
Kind Code:
A
Abstract:
To provide a biaxially oriented polypropylene film which has higher heat resistance and hand tearability.SOLUTION: A biaxially oriented polypropylene film has the following (a) to (c) and 1) and (4) features. (a) The film is composed of a resin composition containing a polypropylene-based resin as a main component. (b) Tear strength (N/mm) in a width direction or a longitudinal direction of the film≤(0.014×film thickness(μm)+0.35). (c) Thermal shrinkage at 150°C in the width direction and the longitudinal direction of the film is 7% or less. (d) A lower limit of a plane orientation coefficient of the film is 0.0125. 1) A lower limit of a mesopentad fraction is 96%. 2) An upper limit of a copolymerization monomer amount other than propylene is 0.1 mol%. 3) A ratio of a mass average molecular weight (Mw) to a number average molecular weight (Mn) is 3.0 or more and 5.4 or less. 4) A melt flow rate (MFR) measured at 230°C and 2.16 kgf is 6.5/10 min or more and 9.0 g/10 min or less.SELECTED DRAWING: None
Inventors:
KINOSHITA OSAMU
YAMADA KOJI
YAMADA KOJI
Application Number:
JP2022085530A
Publication Date:
July 29, 2022
Filing Date:
May 25, 2022
Export Citation:
Assignee:
TOYO BOSEKI
International Classes:
C08J5/18; B29C55/12
Domestic Patent References:
| JP2001040112A | 2001-02-13 | |||
| JP2001302723A | 2001-10-31 | |||
| JP2001171056A | 2001-06-26 | |||
| JPH11254522A | 1999-09-21 | |||
| JPH08300470A | 1996-11-19 | |||
| JP2014055283A | 2014-03-27 | |||
| JP2014051656A | 2014-03-20 |
Foreign References:
| WO2015012324A1 | 2015-01-29 | |||
| WO2014104089A1 | 2014-07-03 |
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