| 摘要 |
A polypropylene resin composition is provided which contains 50 to 90% by weight of a propylene polymer (A) selected from the group consisting of a propylene homopolymer (A-1) and a propylene-ethylene copolymer (A-2), 5 to 20% by weight of a propylene-ethylene-alpha-olefin copolymer (B) given below and 5 to 30% by weight of an ethylene-alpha-olefin copolymer (C) given below, wherein the composition has a melt index, measured at 230° C. under a load of 2.16 kg, of greater than 40 g/10 minutes but not greater than 200 g/10 minutes, propylene-ethylene-alpha-olefin copolymer (B): a copolymer composed of 5 to 99 mol % of propylene units, 60 mol % or less of ethylene units and 1 to 35 mol % of alpha-olefin units, wherein the alpha-olefin has 4 to 20 carbon atoms, the copolymer has a molecular weight distribution of 1 to 4, an intrinsic viscosity of 0.5 to 10 dl/g and a heat of fusion of 30 J/g or less, ethylene-alpha-olefin copolymer (C): a copolymer of ethylene and alpha-olefin having a density of 0.85 to 0.89 g/cm3, wherein the alpha-olefin has 4 to 20 carbon atoms.
|
