| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a manufacturing method for aliphatic polyester resin expandable particles in which a resin is hardly hydrolyzed in a manufacturing step and a process is further simplified as compared with the conventional in the manufacturing step for the aliphatic polyester resin expandable particles having biodegradability and small molding contraction ratio, and a resin composition for the expandable particles. <P>SOLUTION: A melt flow rate value of the biodegradable resin composition can be reduced by giving thermal history to the aliphatic polyester resin having an unsaturated bond. By producing the expandable particle using the resin composition as a raw material, a conventional manufacturing step can be simplified; the biodegradable resin is hardly hydrolyzed in the manufacturing step; and practical aliphatic polyester resin expandable particles having biodegradability, and a foamed molded article can be manufactured. <P>COPYRIGHT: (C)2012,JPO&INPIT |
