| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat-shrinkable void-containing film having biodegradability and a specific gravity of <1. SOLUTION: The heat-shrinkable void-containing film is produced by compounding (A) a lactic acid-based resin with (B) a thermoplastic resin incompatible to the lactic acid-based resin at an A:B ratio of 95-60 mass%:5-40 mass% and drawing a film composed of the mixture in at least one direction. The film has a bulk specific gravity of 0.50-0.99. The thermoplastic resin B incompatible to the lactic acid-based resin is preferably a polyolefin-based resin having a storage elastic modulus of 0.25-2 GPa at 80°C. COPYRIGHT: (C)2006,JPO&NCIPI |
