Polyvinyl alcohol-based hollow fiber membrane and process for pr

Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber

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428400, 21050023, 21050027, 21050042, B01M 3321, B02G 300

Patent

active

057890811

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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patent: 5132059 (1992-07-01), Takahashi et al.
patent: 5173189 (1992-12-01), Hoshi et al.
patent: 5380588 (1995-01-01), Nishiyama et al.
patent: 5455114 (1995-10-01), Ohmory et al.

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