Polyolefin resin composition and shrink film made from the same

A shrink film obtained by uniaxially or biaxially stretching to a draw ratio of at least 3 times a single-layer or multilayer film having a thickness of 50 to 500 μm and at least one layer formed from a polyolefin resin composition comprising:

• (A) 10 to 100 wt % of a propylene/α-olefin random copolymer obtained by random copolymerization of propylene and a C2 to C20 α-olefin, and having a melting point as measured by differential scanning calorimeter (DSC) of 40 to 115° C. and an α-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° C.;
• and
• (C) an alicyclic saturated hydrocarbon resin having a glass transition point of 20 to 100° 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 shrink film obtained by uniaxially or biaxially stretching to a draw ratio of at least 3 times a laminated film having a thickness of 50 to 500 μm and at least one film selected from among polyolefin films, polystyrene films, polyester films, polyamide films, and laminates of a gas barrier resin and an adhesive polyolefin is laminated on one or both sides of a film formed from a polyolefin resin composition comprising:

• (A) 10 to 100 wt % of a propylene/α-olefin random copolymer obtained by random copolymerization of propylene and a C2 to C20 α-olefin, and having a melting point as measured by differential scanning calorimeter (DSC) of 40 to 115° C. and an α-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° C.;
• and
• (C) an alicyclic saturated hydrocarbon resin having a glass transition point of 20 to 100° 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).