| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a laminated porous film which is excellent in heat resistance and ion permeability (air permeability), is made light in weight and easily adjustable and suitable for a separator for a nonaqueous electrolyte secondary battery. <P>SOLUTION: The laminated porous film includes a porous polyolefin layer mainly composed of polyolefin and a heat-resistant mainly composed of an inorganic filler. The inorganic filler contained in the heat-resistant layer has a mode diameter of 0.2-0.6 μm and (D<SB POS="POST">95</SB>-D<SB POS="POST">5</SB>)/D<SB POS="POST">50</SB>of 3.0-10.0. <P>COPYRIGHT: (C)2013,JPO&INPIT |
