| abstract |
An object of the present invention is to provide a laminated porous film having excellent properties as a separator for nonaqueous electrolyte secondary batteries as a laminated porous film that satisfies communication, heat resistance, and workability at the same time. In this invention, the heat-resistant layer containing a filler (a), a resin binder (b), and an extending | stretching adjuvant (c) is laminated | stacked on the at least single side | surface of a polyolefin resin porous film, and air permeability is 2000 second / 100 ml or less It is a laminated porous film characterized by the above-mentioned. |