| 摘要 |
PROBLEM TO BE SOLVED: To provide a propylene-based copolymer composition having high fusion tensile force by having a long chain branched structure, excellent moldability during molding such as inflation molding, extrusion molding, blow molding, injection molding or vacuum molding, and further capable of suitably providing an expanded article excellent in expansion ratio and uniformity of cells during an expansion process.SOLUTION: The propylene-based copolymer composition (Y) is obtained from a specific propylene-based copolymer (A), an ethylene-based copolymer having the ethylene content of 50 mol% or more (C) and a crystalline propylene-based copolymer (D) at least through a process of dynamic heat treatment of the copolymer (C) in a presence of crosslinking agent (E). |
