| abstract |
A porous substrate comprising a porous substrate and a porous layer provided on one side of the porous substrate, the porous layer comprising a first porous layer containing a PVDF resin having a HFP unit content of 3 mass% to 20 mass% and a weight average molecular weight of 100,000 to 150,000, And a second porous layer containing a PVDF resin and a resin having a glass transition temperature of 30 占 폚 to 120 占 폚, as a porous layer provided on the other surface of the porous substrate. A porous substrate and an adhesive porous layer provided on one surface or both surfaces of the porous substrate, the PVDF resin having a HFP unit content of 5% by mass to 20% by mass and a weight average molecular weight of 100,000 to 1,500,000 and a glass transition temperature Is 30 占 폚 to 120 占 폚. A separator for a non-aqueous secondary battery, comprising: |