Patent ID: 11384232

Abstract:
This heterophasic propylene polymerization material comprises a propylene copolymer (I), an ethylene-α-olefin copolymer (II-1), and an ethylene-α-olefin copolymer (II-2), wherein the contained amount of a monomeric unit derived from an olefin other than propylene in the propylene copolymer (I) is not less than 0.05 wt % but less than 10 wt %, the limiting viscosity [η]I of the propylene copolymer (I) is less than 1.50 dL/g, the contained amount of a monomeric unit derived from ethylene in the ethylene-α-olefin copolymer (II-2) is 10-30 wt %, and the limiting viscosity of the ethylene-α-olefin copolymer (II-2) is higher than that of the ethylene-α-olefin copolymer (II-1).