PURPOSE: Provided is a propylene copolymer having excellent transparency, rigidity, surface hardness, heat resistance, heat-sealing property, anti-blocking property, anti-bleedout property and impact strength. CONSTITUTION: The propylene copolymer has the following properties: (i) the copolymer contains ethylene units in an amount of not more than 50 mol%; (ii) a triad tacticity of a chain of propylene units consisting of head-to-tail bonds, as measured by 13 C-NMR, is not less than 98.0%; (iii) a proportion of inversely inserted propylene units based on 2,1-insertion of a propylene monomer in all propylene insertions, as measured by 13 C-NMR, is not more than 0.2%, and (iv) an intrinsic viscosity, as measured in decahydronaphthalene at 135 deg.C, is in the range of 0.1 to 20 dl/g.
PROPYLENE COPOLYMER