Polyvinyl alcohol-based hollow fiber membrane and process for pr

Details Polyvinyl alcohol-based hollow fiber membrane and process for pr Polyvinyl alcohol-based hollow fiber membrane and process for pr

1997-12-23

1999-11-02

Fortuna, Ana

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

21050023, 21050042, 264514, 264638, 264640, B29C 6500

Patent

active

059764333

ABSTRACT:
A polyvinyl alcohol-based hollow fiber membrane having a ratio between the size of particles of 90% rejection and that of particles of 10% rejection of not more than 5, thus proving to have a sharp fractionating property, is produced by a process which comprises, on producing a polyvinyl alcohol-based hollow fiber membrane by dry-jet wet spinning or wet spinning, using a spinneret having heat insulating structure.

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