Method for production of hollow fiber membrane

Details Method for production of hollow fiber membrane Method for production of hollow fiber membrane

1989-05-30

1992-11-03

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

21050023, 21050029, 264187, 2642091, 264559, B29C 6720, D01D 524, D01F 108, D01F 200

Patent

active

051606720

ABSTRACT:
A method for the production of a hollow fiber membrane by the steps of discharging a spinning dope through an annular spinning nozzle and, at the same time, introducing a non-coagulating liquid for the spinning dope into the central cavity in a hollow fiber of the spinning dope being discharged, and then introducing the discharged fiber of the spinning dope into a coagulating liquid thereby solidifying the discharged fiber into a hollow fiber membrane, which method is characterized by incorporating a surface modifying agent in said non-coagulating liquid thereby modifying the inner surface behavior of the produced hollow fiber membrane.

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patent: 4322381 (1982-03-01), Joh
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patent: 4668396 (1987-05-01), Baurmeister et al.
patent: 4741927 (1988-05-01), Pelger et al.
patent: 4744932 (1988-05-01), Browne
patent: 4872982 (1989-10-01), Taylor

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