| 摘要 |
PROBLEM TO BE SOLVED: To provide the film excellent in transparency and gloss and also excellent in packaging aptitude such as flexibility or deformation recovery properties. SOLUTION: A stretch packaging film consists of an A-layer and a B-layer. The A-layer is a propylene/α-olefin random copolymer layer wherein MFR is 0.5-20 g/10 min, the temp. [Tm] of a main fusion peak by DSC is 100-145 deg.C, the content [E] (mol.%) of an α-olefin component satisfies formulae [I], [III], the extraction by orthodichlorobenzene is 2 wt.% or less at 40 deg.C or lower, 5 wt.% or less at 50 deg.C or lower and 20 wt.% or less at 60 deg.C or lower and a ratio of a wt. average mol.wt. and a number average mol.wt. is 1-4. The B-layer is an ethylenic copolymer consisting of 60-95 wt.% ethylene unit and 40-5 wt.% monomer unit selected from vinyl acetate, an aliphatic unsaturated carboxylic acid and an aliphatic alkyl unsaturated monocarboxylic ester. |
