| 摘要 |
Polylactic acid-based resin expanded beads of the present invention are obtained by releasing a softened, pressurized foamable resin composition, which comprises a polylactic acid-based resin and a physical blowing agent, to a low pressure atmosphere to foam and expand the resin composition, wherein the polylactic acid-based resin satisfies the conditions (1) to (3) shown below, and exhibit excellent secondary expansion properties and fusion bonding properties. A polylactic acid-based resin expanded beads molded article obtained by in-mold molding of the polylactic acid-based resin expanded beads exhibits excellent mechanical properties. MT ‰¤ 30 mN logMT ‰¤ 0.93 �¢ log· - 1.75 CT 1 / 2 ‰¥ 600 sec
where MT represents a melt tension [mN] at 190°C, · represents a melt viscosity [Pa·s] at 190°C and a shear speed of 20 sec -1 , and CT 1/2 represents a half crystallization time [sec] at 110°C. |
