Process for forming a skinless hollow fiber of a cellulose ester

Details Process for forming a skinless hollow fiber of a cellulose ester Process for forming a skinless hollow fiber of a cellulose ester

1985-05-31

1988-05-17

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

264179, 264187, 264203, 2642091, 26421116, 264232, 264340, 264558, 264561, 21050023, 21050030, D01F 228, D01D 506

Patent

active

047449322

ABSTRACT:
A skinless hollow fiber of a cellulose ester material is formed by providing an aqueous coagulation bath having a tube-in-ring jet immersed therein and extruding a spinning solution comprising at least one cellulose ester material and a solvent therefor directly into the bath through an annulus surrounding the tube of said tube-in-ring jet while simultaneously allowing a portion of the liquid in the bath to be autogenously aspirated through an opening in the tube, located below the surface of the liquid in the bath, and through the tube thereby forming a lumen in the extruded fiber and then drying the extruded fiber.

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