| 摘要 |
PROBLEM TO BE SOLVED: To provide a stretch film excellent in whitening resistance. SOLUTION: The stretch film has a layer containing an olefin polymer characterized in that the elastic recovery defined by formula (1): elastic recovery = stress residual deformation recovery quantity×100/stretch deformation quantity of a resin composition for evaluation, which comprises 30 pts.wt. of one propylene/ethylene random copolymer. The copolymer is selected from the group consisting of (A) a propylene/ethylene random copolymer wherein a melt flow rate is 3.0±0.5 g/10 min, a temperature of a fusion main peak is 145±2°C and quantity of heat of fusion is 87±5 J/g, and (B) a propylene/ ethylene random copolymer wherein a melt flow rate is 1.5±0.3 g/10 min. A temperature of a fusion main peak is 135±2°C, and quantity of heat of fusion is 60±5 J/g and 70 pts.wt. of the olefin polymer, is 70-100% in at least one resin composition for evaluation. COPYRIGHT: (C)2004,JPO |
