Separator for a non-aqueous secondary battery and non-aqueous secondary battery

A separator for a non-aqueous secondary battery, comprising:

• a porous substrate, and
• an adhesive porous layer that is coated 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 0.6 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 % to 15 mol % or less of a total content of structural units in each of the vinylidene fluoride copolymers,
• wherein a mass ratio of the polyvinylidene fluoride resin A and the polyvinylidene fluoride resin B (polyvinylidene fluoride resin A:polyvinylidene fluoride resin B) in the adhesive porous layer is from 10:90 to 35:65.