Patent ID: 9694326
Date: 2017-07-04
CPC Classifications: B01D

Claim:
1. A composite hollow fiber membrane comprising: a non-porous homogeneous layer that is gas permeable comprising a polyolefin resin A in an amount of at least 90% by mass; and a porous support layer comprising a polyolefin resin B in an amount of at least 90% by mass that supports the non-porous homogenous layer, wherein the polyolefin resin A of the non-porous homogeneous layer is a block copolymer of ethylene units and at least one type of olefin units selected from C3 to C20 α-olefin units, wherein the polyolefin resin A of the non-porous homogeneous layer has a melting point of at least 100° C. to no higher than 135° C.