| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a polylactic acid-based resin film or sheet which does not melt or deform even at high temperatures exceeding 100°C, and furthermore, during production and processing of the film or sheet, there is no breakage or tearing when the film or sheet is rolled into a roll or the like. <P>SOLUTION: The polylactic acid film or sheet is a resin film or sheet including polylactic acid (A), contains 5-30 pts.wt. of a flexible aliphatic polyester (B) relative to 100 pts.wt. of the polylactic acid (A), and also has the melting endothermic value ΔHc' of 10 J/g or more in a crystallization section at the time of film-forming, which is determined by the following formula (1) ΔHc'=ΔHm-ΔHc. In the formula, ΔHc is the exothermic value (J/g) associated with crystallization in the heating process of the film or sheet after film-forming, and measured using DSC; and ΔHm is the endothermic value (J/g) associated with the melting thereafter. <P>COPYRIGHT: (C)2012,JPO&INPIT |
