Hollow fibre membrane extrusion

Details Hollow fibre membrane extrusion Hollow fibre membrane extrusion

1993-02-05

1995-03-07

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

2642091, 264211, 26421115, 26421116, 264558, 264561, 264562, D01D 5247

Patent

active

053955706

ABSTRACT:
Extrusion of hollow membranes is improved by coextruding a coating fluid layer about the extrudate of heated polymer solution with its interior lumen forming extrudate. The coating fluid is disposed between the forming hollow fiber and a cooling fluid, and controls the rate of heat transfer to afford superior control over the structure and form of the hollow fiber produced in the invention. The coating fluid is typically the same material as the cooling fluid, and often is the same material as the solvent for the polymer in the heated polymer solution.

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