| abstract |
Composite structure consisting of a homogeneous thin film sandwiched between porous support layers, wherein the ratio of oxygen permeate flow rate to nitrogen permeate flow rate of the membrane is at least 1.1 and the membrane is immersed in a chemical solution according to JIS K 7114, and the rate of change of the ratio is within ± 10%. It discloses about the composite hollow fiber membrane which has a. The composite hollow fiber membrane can be used to degas the chemical without any liquid leakage.n n n n Composite hollow fiber membrane, chemical liquid, degassing |