| 摘要 |
A separator for a non-aqueous secondary battery including a porous substrate, and an adhesive porous layer that is formed on one side or both sides of the porous substrate and contains the following polyvinylidene fluoride resin A and the following polyvinylidene fluoride resin B: Polyvinylidene fluoride resin A: a polyvinylidene fluoride resin containing structural units derived from vinylidene fluoride and structural units derived from hexafluoropropylene, a total content ratio of structural units derived from hexafluoropropylene in each of the vinylidene fluoride copolymers being from 0.5 mol % to 1.5 mol % of a total content of structural units in each of the vinylidene fluoride copolymers; and Polyvinylidene fluoride resin B: a polyvinylidene fluoride resin containing structural units derived from vinylidene fluoride and structural units derived from hexafluoropropylene, a total content ratio of structural units derived from hexafluoropropylene in each of the vinylidene fluoride copolymers being greater than 1.5 mol % of a total content of structural units in each of the vinylidene fluoride copolymers. |
