POLYOLEFIN-BASED HOLLOW FIBER MEMBRANE

摘要

PROBLEM TO BE SOLVED: To provide a polyolefin-based hollow fiber membrane for wastewater treatment which prevents dropout of copolymer of the olefin of the hollow fiber membrane and a hydroxy group-containing monomer and has further favorable oxidative deterioration resistance.SOLUTION: A polyolefin-based hollow fiber membrane is obtained by attaching to the hollow fiber membrane substrate comprising one kind of polyolefin, a polyolefin-based copolymer which has the same olefin unit (A) as the main one of polyolefin composing the hollow membrane and the olefin unit (B) having hydroxy groups in a side chain, and satisfies the following conditions: (a) the content of the olefin unit (A) of 35 to 45 mol%; and (b) the melt flow rate (MFR) at 210°C of 0.01 to 5 g/m.