Title:
多孔性ポリプロピレンフィルム
Document Type and Number:
Japanese Patent JP5807388
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a porous polypropylene film which is excellent in not only air permeability and productivity but also in sticking rigidity, rupture rigidity and extrusion stability.SOLUTION: The porous polypropylene film has at least one layer composed of a polypropylene composition containing a polypropylene resin and a β-crystal nucleous agent, and the polypropylene resin satisfies the following conditions (I) to (V). The condition (I): a melt flow rate (MFR) measured at a temperature of 230°C and at 2.16 kg is 2 to 10 g/10min. The condition (II): the polypropylene resin is composed of at least two kinds of polypropylene of a component 1 and a component 2, and a melt flow rate (MFR) of the component 2 is smaller than a melt flow rate (MFR) of the component 1. The condition (III): the melt flow rate (MFR) of the component 1 is not smaller than 5 g/10min. The condition (IV): the melt flow rate (MFR) of the component 2 is not larger than 4 g/10min. The condition (V): MFR/MFR<0.25.
Inventors:
Takuya Kuma
Masatoshi Okura
Yasuyuki Imanishi
Masatoshi Okura
Yasuyuki Imanishi
Application Number:
JP2011116819A
Publication Date:
November 10, 2015
Filing Date:
May 25, 2011
Export Citation:
Assignee:
TORAY INDUSTRIES,INC.
International Classes:
C08J9/00; B32B27/32; C08L23/10; H01M2/16
Domestic Patent References:
| JP2001342272A | ||||
| JP2006307193A | ||||
| JP2006326890A | ||||
| JP2009242693A | ||||
| JP2010095629A | ||||
| JP2010065088A |
Foreign References:
| WO2005103127A1 | ||||
| WO2007132826A1 |