Process for preparing polyvinyl alcohol yarn

Details Process for preparing polyvinyl alcohol yarn Process for preparing polyvinyl alcohol yarn

D - Textiles, Paper

01

F

18/602

D01F 6/14 (2006.01) D01D 4/02 (2006.01) D01D 5/06 (2006.01)

Patent

CA 1301418

ABSTRACT OF THE DISCLOSURE A yarn having a viscosity average molecular weight ?v in the range of 105 to 4.105 is produced by extruding and drawing a solution of polyvinyl alcohol in an organic solvent, from a spinneret into a coagulation bath through an air gap or inert gas gap. The length of the capillaries of the spinneret in the direction of flow is at least 5 times their diameter, and the concentration C in % by weight of the polymer solution is so selected that C ? 30 - 5.10-5 ?v.

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