| 摘要 |
PROBLEM TO BE SOLVED: To obtain a film useful as a domestic wrapping film and capable of being easily disposed of by selecting an oriented film made from a composition containing a resin based on a glycolate aliphatic polyester resin having a specified crystalline melting point and a liquid additive in a specified ratio and specified in a tensile modulus, a heat shrinkage, heat shrinkage stress, etc. SOLUTION: There is provided an oriented film made from a composition 100 pts.wt. resin based on a glycolate aliphatic polyester (e.g. a resin prepared by copolymerizing glycolic acid with glycolic acid) having a crystalline melting point of 120-250 deg.C and 1-20 pts.wt. liquid additive (e.g. tetraglycerol monolaurate) and having a tensile modulus of 20-150 kg/mm2, a heat resistance of 120 deg.C or above, and an adhesiveness of 5-30 g.cm/25 cm2, and satisfying the relationships: Y<=(1,400-20X)/3, 2<=X<=45, and 5<=Y<=350 (wherein X% is the heat shrinkage at 100 deg.C, and Y g/mm2 is the heat shrinkage stress at 100 deg.C).
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