Porous film
AssigneeNitto Denko Corporation
InventorsShunsuke Noumi, Yutaka Yamamura, Seiryu Nakayama
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Abstract
A porous film which has a crosslinked structure and, due to this structure, has excellent resistance to film breakage at high temperatures and excellent transverse-direction shape retention even at high temperatures, uses of the film are provided. The porous film comprises a crosslinked material of a resin composition containing a polyolefin. The film has a peak of shrinkage force in a transverse direction (TD) at a temperature region of the shutdown temperature or higher of the film, and the shrinkage force as measured at the peak being 80 N/cm2 or lower.
Claims13
A porous film comprising a crosslinked material of a resin composition containing a polyolefin, the film having a peak of shrinkage force in a transverse direction (TD) at a temperature region of the shutdown temperature or higher of the film, and the shrinkage force as measured at the peak being 80 N/cm2 or lower.
Dependencies are inferred from the claim text.