Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion
Patent
1998-03-26
1999-10-19
Tentoni, Leo B.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Shaping by extrusion
D01F 228
Patent
active
059684330
ABSTRACT:
The invention is a process for spinning solutions of cellulose carbamate by extruding the solution through a spinneret into a precipitation bath, coagulating the cellulose carbamate fibers thus formed and drawing off the fibers by mechanical means, where the fibers are enveloped from the outlet from the spinneret to the outlet from the precipitation bath in a stream of precipitating medium flowing in the same direction, where the velocity of flow of the precipitation medium where the fibers exit the spinneret (plane X1) amounts to 0.1 to 0.8 times the draw-off speed of the fibers, and the velocity of flow of the precipitation medium where the fibers exit the precipitation bath (plane X3) amounts to 0.96 to 1.1 times the draw-off speed of the fibers.
REFERENCES:
patent: 710819 (1902-10-01), Thiele
Turunen et al., Lenzinger Berichte, "Some Aspects on the Spinning of the Cellulose Carbamate", pp. 111-115, Aug. 1985.
Chemiefasern, Chemie-Technologie, Georg Thieme Verlag Stuttgart, New York, p. 134, 1982.
Schmiedeknecht, Lit. S. 607, 23. Das Trichterspinnverfahren, pp. 602-607 (Undated).
Belch Marco
Keunecke Gerhard
Wack Juergen
Tentoni Leo B.
Zimmer Aktiengesellschaft
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