| 摘要 |
PROBLEM TO BE SOLVED: To provide a stretch packaging film having suitable transparency, packaging machine aptitude, finish after packaging, heat sealability and cold resistance. SOLUTION: A stretch packaging film has a three-layered structure consisting of a base material layer and both surface layers and the base material layer comprises a compsn. consisting of 90-20 wt.% of (a) a soft polyolefinic resin, 5-40 wt.% of (b) a crystalline polypropylene resin and 5-40 wt.% of (c) a hydrogenated deriv. of at least one kind of a resin selected from the group consisting of a petroleum resin, a terpene resin and a rosin resin and both surface layers comprise an ethylene/vinyl acetate copolymer with a content of a monomer based on vinyl acetate of 5-20 wt.% and the coefficient of crystal orientation of polypropylene in an extruding direction calculated by an X-ray diffraction method of a laminated film after film molding is 0.25 or less.
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