Process for the production of cellulose fibres and device...

Details Process for the production of cellulose fibres and device... Process for the production of cellulose fibres and device...

D - Textiles, Paper

01

F

D01F 2/00 (2006.01) D01D 5/06 (2006.01) D01D 5/14 (2006.01) D04H 3/12 (2006.01)

Patent

CA 2213221

A process for the production of cellulose fibres, wherein a warm solution of cellulose in a tertiary amine-oxide is spun into filaments, which are conducted across an air gap and thereafter contacted with a precipitation agent to precipitate the cellulose, said filaments being drawn off by exerting a force and being stretched in the air gap, which force is exerted by said precipitation agent by making flow said precipitation agent into the direction where said filaments are drawn off and contacting said filaments with said precipitation agent, characterized in that said precipitation agent is made flow, at the point where it is contacted with said filaments, at a rate which is at least as high as the drawing rate of said filaments. The invention is also concerned with a device for carrying out the process (Fig. 2).

Selon ce procédé de production de fibres de cellulose, on file une solution de cellulose dans un oxyde d'amine tertiaire à l'état chaud de façon à former des filaments que l'on conduit à travers un passage rempli d'air et que l'on met en contact avec un agent précipitant afin de provoquer la précipitation de la cellulose. Les filaments sont tirés par une force et étirés dans le passage rempli d'air. Cette force est exercée par l'agent précipitant qui s'écoule dans la direction d'étirement des filaments et qui entre en contact avec les filaments. Ce procédé se caractérise en ce que l'agent précipitant, au moment où il entre en contact avec les filaments, s'écoule à une vitesse au moins aussi grande que la vitesse d'étirement des filaments. L'invention concerne également un dispositif de mise en oeuvre du procédé.

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