| 摘要 |
PROBLEM TO BE SOLVED: To improve the lateness in crystallization, which is a blemish of a P3HA copolymer exhibiting especially late crystallization among various biodegradable polyesters, to improve the workability in the processing of injection molding, film molding, blow molding, fiber spinning, extrusion foaming, bead foaming or the like, and to improve working speed. SOLUTION: The biodegradable polyester-based resin composition is PHA (polyhydroxyalkanoate) produced from microbes, especially is a P3HA copolymer, which comprises a repeating unit shown by formula (1) [-CHR-CH<SB>2</SB>-CO-O-], wherein R is an alkyl group expressed by C<SB>n</SB>H<SB>2n+1</SB>, and n is an integer of 1 or more and 15 or less, and has a D value showing the block property of a high crystal component is 1.5 or more. COPYRIGHT: (C)2008,JPO&INPIT
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