| 摘要 |
PROBLEM TO BE SOLVED: To provide a polypropylene heat-shrinkable film having a large heat shrinkage factor, low in specific gravity and hard to break when stress is applied to the film in the direction right-angled to the main stretching direction of the film. SOLUTION: This polypropylene heat-shrinkable film includes at least one layer comprising a resin composition containing 50-90 wt.% of a propylene/α-olefin random copolymer, which is polymerized using a metallocene catalyst and characterized in that an MFR (230°C, 2.16 kg load) is 0.5-10 g/10 min and a melting peak temperature Tm(°C) due to DSC is 100-145°C, with 5-45% of an ethylene/α-olefin random copolymer with an MFR (190°C, 2.16 kg load) of 0.5-10 g/10 min and a density of 0.860-0.895 g/cm<SP>3</SP>and 5-45 wt.% of an alicyclic hydrocarbon resin, of which the softening temperature due to JIS K-2207 is 110°C or above, as essential components. Further, the polypropylene heat-shrinkable film is stretched at least unidirectionally. COPYRIGHT: (C)2005,JPO&NCIPI |
