| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an adhesive tape or sheet having a polylactic acid-based substrate material, which prevents the substrate material from melting or deforming even at high temperature exceeding 100°C, and which prevents breakage or tearing from occurring during the time of producing or processing the adhesive tape or sheet, when rolled into a roll form and the like. <P>SOLUTION: In the adhesive tape or sheet, a polylactic acid film or sheet that configures the substrate material includes: a polylactic acid (A); and 5 to 30 pts.wt. of a soft aliphatic polyester (B) based on 100 pts.wt. of the polylactic acid (A), wherein the melting endothermic value ΔHc' of crystallizing section on film formation, obtained by the formula (1): ΔHc'=ΔHm-ΔHc, is ≥10 J/g. In the formula (1), ΔHc is the exothermic value (J/g) associated with the crystallization in the temperature elevation process for the film or sheet after the film formation, and measured by DSC, and ΔHm is the endothermic value (J/g) associated with the melting thereafter. <P>COPYRIGHT: (C)2012,JPO&INPIT |
