PROCESS FOR PRODUCING EXTRUDED FOAM OF POLYHYDROXYALKANOATE RESIN AND EXTRUDED FOAM OBTAINED BY THE PROCESS

摘要

An extruded foam excelling in environmental friendliness and having biodegradability; and a stable process for producing the same. There is provided a process for producing an extruded foam of P3HA resin, characterized by melt-kneading a copolymer (poly(3-hydroxyalkanoate), P3HA) having at least one type of repeating unit of the formula: -O-CHR-CH 2 CO- (1) (wherein R is an alkyl group represented by C n H 2n+1 and n is an integer of 1 to 15) produced by a microorganism, a volatile foaming agent, a fatty acid amide compound and/or liquid paraffin to thereby obtain a mixture and extruding the mixture through molding die into a low-pressure zone.