| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a porous film excellent in dimensional stability and to provide a method of producing the same. <P>SOLUTION: This invention relates to a biaxially oriented polyolefin-based porous film, wherein when the wide-angle X-ray scattering of the film is measured at optional temperature in a range of ((the melting point of the polyolefin-based film)+20°C)±3°C, scattering derived from a crystal oriented in an MD direction of the film and/or scattering derived from a crystal oriented in a TD direction thereof can be obtained. <P>COPYRIGHT: (C)2013,JPO&INPIT |
