| abstract |
The present invention provides a laminated porous film and a nonaqueous electrolyte secondary battery. In the laminated porous film, a laminated porous film containing a heat-resistant layer containing a binder resin and a filler is laminated on one surface or both surfaces of a porous film of a base material containing polyolefin as a main component, and a binder resin and a filler At least one of the portions of the porous film of the substrate is formed in contact with the heat-resistant layer, and the total thickness of the portion is 1% or more and 20% or less of the entire thickness of the porous film of the substrate. The nonaqueous electrolyte secondary battery contains the laminated porous film as a spacer. |