| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a separator having a polylactic acid base material in which separator base material does not melt or is not deformed at a high temperature over 100°C and in which breaking or tearing can be prevented when the separator is manufactured, processed, wound in a roll or the like. <P>SOLUTION: The separator includes the separator base material formed of polylactic acid film or sheet. The polylactic acid film or sheet contains polylactic acid (A) and 5-30 pts.wt. of soft aliphatic polyester (B) based on 100 pts.wt. of the polylactic acid (A) and has a melt endothermic amount ΔHc' of 10 J/g or greater in a part crystallized during film formation, which is expressed by formula (1) ΔHc'=ΔHm-ΔHc, where ΔHc is the heating value (J/g) measured by DSC which is caused by crystallization in a temperature rising process for the film or the sheet after film formation and ΔHm is the endothermic amount (J/g) caused by melting thereafter. <P>COPYRIGHT: (C)2012,JPO&INPIT |
