| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for producing a biodegradable polyester-based resin foamed sheet capable of preparing a product expressing a good foamed state and having excellent strength. <P>SOLUTION: There is provided the method for producing a biodegradable polyester-based foamed sheet by which the biodegradable polyester-based foamed sheet is produced by extruding and foaming a resin composition comprising a biodegradable aliphatic polyester-based resin, a biodegradable aliphatic-aromatic copolyester-based resin and an anti-shrinkage agent, wherein the resin composition comprises the biodegradable aliphatic polyester-based resin (A) having ≥0.5 and ≤1.0 cN melt tension at 190°C and ≥200 and ≤600 Pa s melt viscosity measured under the conditions of 190°C temperature and 100 sec-1 shear velocity and the biodegradable aliphatic-aromatic copolyester-based resin (B) having ≤15°C melting point difference between the biodegradable aliphatic polyester-based resin (A) and the resin (B) at 55:45-98:2 mass ratio (A:B), and contains ≥0.05 and ≤5 pts.mass anti-shrinkage agent based on 100 pts.mass sum total of the biodegradable aliphatic polyester-based resin (A) and the biodegradable aliphatic-aromatic copolyester-based resin (B). <P>COPYRIGHT: (C)2013,JPO&INPIT |
