Method for providing shaped fiber

Details Method for providing shaped fiber Method for providing shaped fiber

D - Textiles, Paper

01

D

18/616

D01D 5/253 (2006.01) D01D 5/24 (2006.01) D01F 6/18 (2006.01)

Patent

CA 1133213

ABSTRACT OF THE DISCLOSURE A process is disclosed for preparing fiber of desirable cross- sectional shape. The process comprises preparing a homogeneous single phase fusion melt of a fiber-forming acrylonitrile polymer and water and extruding the fusion melt through a spinnerette directly into a steam-pressurized solidification zone maintained under conditions which prevent formation of a sheath-core structure in the resulting extrudate and enable orientation stretching to be effected. The spinnerette is modified by securing a strand of wire therein to block part of its useful spinning area and to provide the structured cross-sectional fiber shape. The nascent extrudate is stretched while it remains in the solidification zone to provide orientation of the polymer molecules.

343847

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