| 摘要 |
PROBLEM TO BE SOLVED: To provide a composite hollow fiber membrane for degassing, which is excellent in a gas transmission performance, suppresses a generation of a pinhole, and is excellent in solvent resistance and leachability.SOLUTION: A composite hollow fiber membrane for degassing uses a separation layer which contains (A1) propylene-ethylene random copolymer whose ethylene unit content is in the range of 0.5 to 6 mass%, and (A2) a copolymer containing a propylene unit and an ethylene unit having the ethylene unit content 3 to 20 mass% more than the content of (A1) that are respectively polymerized using a metallocene-based catalyst, and is in a structure that particles composed of a component (A2) are dispersed in a component (A1). |
