Hollow fiber membrane formed from a block copolymer of aromatic polyester and polyoxyethylene for dialysis of blood

摘要

A hollow fiber membrane for the dialysis of blood is formed by melt-spinning a block copolymer which has a reduced viscosity of 1.5 to 4.0 and is comprised of 30 to 60% by weight of an aromatic polyester having a water absorption up to 1% by weight and 40 to 70% by weight of polyoxyethylene or its derivative having a number average molecular weight of 3000 to 20000.