ASYMMETRIC POROUS ECTFE HOLLOW FIBER MEMBRANE

摘要

The present invention relates to an asymmetric porous polyethylene-chlorotrifluoroethylene (ECTFE) hollow membrane having high water permeability by reducing permeation resistance for the whole thickness of a selective layer to be less than 30% of the whole thickness of a support layer and the selective layer while having a high rejection rate, excellent filtering efficiency and high mechanical strength. Also the water permeability of the ECTFE hollow fiber membrane can be improved by minimizing the decrease of the water permeability due to the hydrophobic property of ECTFE in the process of including a hydrophilic additive.