Method of producing cellulose fibres

D - Textiles – Paper – 01 – D

Patent

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Details

D01D 5/06 (2006.01) D01F 2/00 (2006.01)

Patent

CA 2216644

The invention concerns a method of producing cellulose fibres by extruding a spinning solution containing dissolved cellulose in a gaseous medium over a predetermined gas section, subsequent immersion in and passage through a coagulation bath over a predetermined coagulation section, and stretching and winding up the resultant cellulose fibres. The invention is characterized in that, after the gas section, the extruded spinning solution (2) is introduced into a coagulation bath which is accelerated to a predetermined speed and flows steadily at least approximately in the direction of the extruded spinning solution. The coagulation liquid (7) is fed laterally into the path of the spinning solution and the directions of flow of the spinning solution and of the coagulation liquid are maintained at least approximately parallel (3) over the entire coagulation section. On leaving the coagulation section, the resultant cellulose fibres (5) are laterally deflected (4) and then wound up (6).

L'invention concerne un procédé de production de fibres cellulosiques par extrusion d'une solution à filer contenant de la cellulose dissoute, dans un milieu gazeux, sur une section gazeuse prédéfinie, puis par immersion et par passage à travers un bain de coagulation, sur une section de coagulation prédéfinie. Les fibres de cellulose obtenues sont ensuite étirées et enroulées. Ce procédé se caractérise en ce qu'après la section gazeuse, la solution à filer (2) extrudée est introduite dans un bain de coagulation à écoulement laminaire accéléré à une vitesse prédéfinie, au moins approximativement dans la direction de la solution à filer extrudée. Le liquide du bain de coagulation (7) est acheminé latéralement dans la voie de la solution à filer. Le sens d'écoulement de la solution à filer et celui du liquide du bain de coagulation sont maintenus au moins approximativement parallèles (3). Au moment où elles quittent la section de coagulation, les fibres de cellulose (5) obtenues sont déviées (4) latéralement, puis enroulées (6).

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