| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method of producing expandable polylactic acid-based resin particles, by which the expandable polylactic acid-based resin particles excellent in mutual adhesiveness of expandable particles are obtained without using an adhesiveness-improving agent. <P>SOLUTION: In the expandable polylactic acid-based resin particles, a polylactic acid-based resin that has an endothermic energy amount of 10 J/g, measured by differential scanning calorimetry at heating rate of 2°C/min, is used as a base resin. The method of producing the expandable polylactic acid-based resin particles includes: an impregnation step of impregnating 100 pts.wt of polylactic acid-based resin particles with 1 pt.wt or more of physical foaming agent; and a dissipation step of exposing the polylactic acid-based resin particles that is impregnated with the physical foaming agent under the condition of the temperature of 0 to 40°C to dissipate 10-60 wt.% of the physical foaming agent thus impregnated, thereby obtaining the expandable polylactic acid-based resin particles having a foaming agent content of 3.9 wt.% or lower. <P>COPYRIGHT: (C)2012,JPO&INPIT |
