| abstract |
PROBLEM TO BE SOLVED: To provide a sheet-like polylactic acid cross-linked foam having both heat resistance and flexibility and easy to secondary molding such as vacuum molding and compression molding. Furthermore, the optimal manufacturing method is provided. SOLUTION: The melt viscosity at a temperature of 170 ° C. and a shear rate of 100 sec −1 is 1.0 × 10 3 to 1.0 × 10 4 Pa · s, and the molar ratio of d-form to l-form is d / l = 98/2. -70/30 or d / l = 2 / 98-30 / 70 polylactic acid 90-10% by weight, and a melt viscosity at a temperature of 170 ° C. and a shear rate of 100 sec −1 is 1.0 × 10 3 -1 . A cross-linked foam comprising a biodegradable resin composed of 10 to 90% by weight of a biodegradable polyester resin other than polylactic acid, which is 0 × 10 5 Pa · s, a thermal decomposable foaming agent, and a crosslinking aid. Moreover, it is a sheet-like polylactic acid cross-linked foam having a gel fraction of 10% or more. [Selection figure] None |