| 摘要 |
PROBLEM TO BE SOLVED: To provide a packing film excellent in heat shrinkability and the restoring properties against deformation and not leaving wrinkles in a package when used in high speed automatic packing by a shrink method. SOLUTION: An ethylene/vinyl acetate copolymer film is laminated to surfaces of an inner layer film containing 100 pts.wt. of an ethylene/α-olefin copolymer polymerized by using a single site catalyst, 10-80 pts.wt. of a propylene polymer and 10-200 pts.wt. of an ethylene/α-olefin copolymer polymerized by using a Ziegler catalyst and the obtained laminate is subjected to inflation molding in a blow ratio of 2.5-4.5. |
