FILTRATION MEDIA FOR LIQUID FILTRATION

摘要

A process for forming a filtration medium comprising the steps of:
providing a fine fiber spinning apparatus comprising a spinning beam comprising at least one spinning beam comprising a spinning nozzle, a blowing gas injection nozzle and a collector, the spinning beam and the collector having high-voltage electrostatic field maintained therebetween;
supplying to the spinning nozzle a polymer solution comprising a polymer and a solvent;
compressively discharging the polymer solution from the spinning nozzle and blowing said solution with a blowing gas discharged from said gas injection nozzle to form a fibrous web of nanofibers; and
collecting the fibrous web having a basis weight of between about 2 g/m 2 and about 100 g/m 2 , as measured on a dry basis, on a moving collection apparatus in a single pass beneath a single spinning beam.