| abstract |
A separator for a non-aqueous secondary cell provided with a porous base material, and an adhesive porous layer provided on one surface or both surfaces of the porous base material, the adhesive porous layer containing a polyvinylidene fluoride resin having a vinylidene fluoride monomeric unit and a hexafluoropropylene monomeric unit, and in which the acid value is 3.0 mg KOH/g to 20 mg KOH/g inclusive. |