| 摘要 |
A polyolefin resin composition comprises (A) 10 to 100 wt% of a propylene/ alpha -olefin random copolymer obtained by random copolymerization of propylene and a C2 to C20 alpha -olefin, and having a melting point as measured by DSC of 40 to 115 DEG C and an alpha -olefin content of 5 to 70 mol%, (B) 0 to 90 wt% of a random propylene resin having a melting point as measured by DSC of 120 to 150 DEG C, and (C) an alicyclic saturated hydrocarbon resin having a glass transition point of 20 to 100 DEG C and a number average molecular weight of 1200 or less, the component (C) being used in an amount of 5 to 100 weight parts per 100 weight parts of the total amount of the components (A) and (B). A single-layer or multilayer film obtained from the polyolefin resin composition can be stretched at a lower temperature than in the conventional one, and a shrink film obtained by such a low-temperature stretching has a higher shrinkage factor than one stretched at a high temperature, and also has a small natural shrinkage factor. |
