Method of manufacturing a hollow porous fiber

Details Method of manufacturing a hollow porous fiber Method of manufacturing a hollow porous fiber

1987-04-27

1989-04-11

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

264561, 264562, 264571, 264184, 2642091, 2642092, 26421116, 264101, 21050023, 21050038, D01D 5247

Patent

active

048204609

ABSTRACT:
A quench bath, for quenching and solidifying an extruded hollow porous fiber of a liquid polymer solution in a chemical quenching solution, includes a shallow quench bath of a length for the generally horizontal part of the extruded fiber travel in the bath. A vertical extension tube with its lower end beneath the surface of the bath liquid holds a spinneret through which the fiber is extruded. The spinneret is sealed in the tube above the height of the liquid in the shallow bath. A vacuum drawn in the tube raises the liquid up to the spinneret. Also, the vacuum may be drawn by disposing the spinneret in a sealing piston which is raised through the tube to draw the vaccum in the tube behind the piston.

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