| 摘要 |
<p>The purpose is to provide a laminated porous film having shutdown characteristics, which are important in terms of ensuring safety, while also having excellent air permeation performance, which contributes to electrical performance, when used a separator for a battery. The present invention is a laminated porous film characterized by comprising: a porous film layer having a thickness of 10 um or more, the main component thereof being a thermoplastics resin composition having a crystal-melting peak temperature of 150-250 °C; and a nonwoven fiber layer having a fiber diameter of 1 um or less, the main component thereof being a thermoplastic resin composition having a crystal-melting peak temperature of 100 °C to less than 150 °C; the air permeability of the laminated porous film being 10-10,000s/100mL.</p> |
