| 摘要 |
PROBLEM TO BE SOLVED: To obtain a film which maintains transparency and sealability and has excellent piercing strength by using ethylene-α-olefin copolymer resins having different densities for a surface layer and an inner layer, and mixing polybutene resin with a polypropylene resin layer of other inner layer. SOLUTION: In the multilayer shrink film, a surface layer A contains 50wt.% or more of ethylene-α-olefin copolymer resin and an inner layer contains a polypropylene resin layer B. Apart from the layer A, the inner layer has at least one layer C containing 50wt.% or more of ethylene-α-olefin copolymer resin and having a density of 0.900 to 0.930g/cm<3> . The copolymer resin is different in density from the copolymer resin used for the layer A and has 0.2 to 3g/10min of a melt flow rate at 190 deg.C and 2.16kgf of a load. |
