| 摘要 |
<p>Polylactic acid-based resin foamed particles according to the present invention are obtained by foaming a softened and pressurized foamable resin composition, which includes a polylactic acid-based resin that satisfies conditions (1) to (3) below and a physical foaming agent, by discharging the foamable resin composition into a low-pressure atmosphere. The particles exhibit excellent secondary foaming properties and fusion properties when molded in a mold. In addition, a molded article using these polylactic acid-based resin foamed particles exhibits excellent mechanical properties. (1): MT <= 30 mN; (2): logMT <= 0.93logeta - 1.75; and (3): CT1/2 >= 600 sec, where MT is the melt tension (mN) at a temperature of 190°C, eta is the melt viscosity (Pa·s) at a temperature of 190°C and a shear rate of 20 sec-1, and CT1/2 is the semi-crystallization time (sec) at a temperature of 110°C.</p> |
