| 摘要 |
Provided is a separator for a nonaqueous electrolyte battery including a composite membrane. The composite membrane includes a porous substrate that contains a thermoplastic resin and an adhesive porous layer that is provided on at least one side of the porous substrate and contains an adhesive resin. The difference between the Gurley number of the porous substrate and the Gurley number of the composite membrane is 75 sec/100 cc or less. The difference between the tortuosity of the porous substrate and the tortuosity of the composite membrane is 0.30 or less. |
