| abstract |
Provided is a non-aqueous secondary battery separator comprising: a porous substrate; a first porous layer that is disposed on one surface of the porous substrate and contains a PVDF resin in which the content of an HFP unit is 3-20 mass% and the weight-average molecular weight is 100,000-1,500,000; and a second porous layer that is disposed on the other surface of the porous substrate and contains a PVDF resin and a resin having a glass transition temperature of 30-120°C. Also provided is a non-aqueous secondary battery separator comprising a porous substrate and an adhesive porous layer that is disposed on one surface or both surfaces of the porous substrate and contains: a PVDF resin in which the content of an HFP unit is 5-20 mass% and the weight-average molecular weight is 100,000-1,500,000; and a resin having a glass transition temperature of 30-120°C. |