abstract |
The present invention provides a separator for a non-aqueous battery, comprising: a porous base material; and at least one surface of the porous base material, comprising the following polyvinylidene fluoride-based resin A and polyvinylidene fluoride-based resin Adhesive porous layer of B. (1) selected from the group consisting of a vinylidene fluoride homopolymer having a weight average molecular weight of 600,000 to 2.5 million, and a constituent unit derived from vinylidene fluoride and a constituent unit derived from hexafluoropropylene, and with respect to all constituent units Polyvinylidene fluoride resin A in a group of hexafluoropropylene having a content of 1.5 mol% or less and a weight average molecular weight of 600,000 to 2.5 million vinylidene fluoride copolymer, (2) It contains a structural unit derived from vinylidene fluoride and a constituent unit derived from hexafluoropropylene, and a polyvinylidene fluoride-based resin B having a content of a constituent unit derived from hexafluoropropylene of more than 1.5 mol% based on all constituent units. |