Polyolefin-composite hollow-fiber membrane and manufacturing method for same, and hollow-fiber membrane module

摘要

The present invention pertains to a polyolefin-composite hollow-fiber membrane and a manufacturing method for the same, said polyolefin-composite hollow-fiber membrane having: a homogenous membrane layer formed from polyolefins having a metal flow rate measured in accordance with JIS K7210 code D of 1.0 g/10 minutes, or less, and an Mw/Mn ratio of not more than 4.0; and a porous membrane layer which is formed from polyolefins having an Mw/Mn ratio of 8.0-12.0. The present invention also pertains to a hollow-fiber membrane module which is equipped with the polyolefin-composite hollow-fiber membrane. The present invention enables the provision of a polyolefin-composite hollow-fiber membrane, a manufacturing method for the same and a hollow-fiber membrane module; the polyolefin-composite hollow-fiber membrane has excellent solvent resistance and gas permeability, and when used in the deaeration of dissolved gas in a drug solution, can suppress leakage of the drug solution to a high degree, and can efficiently reduce the amount of dissolved gas.

主权项

1. A polyolefin-composite hollow-fiber membrane comprising a non-porous, homogeneous membrane layer that is permeable to gas, and a porous membrane layer supporting the homogeneous membrane layer,
wherein the homogeneous membrane layer comprises polyolefins having an Mw/Mn ratio of mass average molecular weight (Mw) and number average molecular weight (Mn), of no more than 4.0, and a melt flow rate as measured in accordance with code D of JIS K7210 (MFRD) of no more than 1.0 g/10 min., and wherein the porous membrane layer comprises polyolefins having an Mw/Mn ratio of 8.0 to 12.0 and having a melt flow rate as measured in accordance with code D of JIS K7210 (MFRD) of 0.1 to 1.0 g/10 min.