Method for producing cellulosic forms

Details Method for producing cellulosic forms Method for producing cellulosic forms

D - Textiles, Paper

01

F

D01F 2/00 (2006.01) C08B 16/00 (2006.01) D01F 13/02 (2006.01)

Patent

CA 2344161

The invention relates to a method for producing cellulosic forms, especially fibres and filaments, by a) dissolving cellulose in an aqueous solution of a tertiary amine oxide, especially N-methylmorpholine-N-oxide, and b) extruding the cellulose solution through a moulding tool, over an air gap and into a precipitating bath, the forms separating out. The cellulose solution and/or the precipitating bath contain a tenside. The method is characterised in that step b) is carried out with a cellulose solution and/or precipitating bath tenside content (c) in the region of 100 ppm > c 5ppm and an air gap width of between 2 and 20 mm. The inventive method avoids any deterioration or considerable fluctuations in the physical textile properties of the spun fibres or filaments in spite of the reduced width of the air gap.

L'invention concerne un procédé de production de corps moulés cellulosiques, notamment de fibres et de filaments. Ce procédé consiste 2) à dissoudre de la cellulose dans une solution aqueuse d'un oxyde amino tertiaire, notamment de N-méthylmorpholin-N-oxyde, et b) à extruder la solution cellulosique par un moule à travers un espace d'air dans un bain de précipitation par précipitation du corps moulé. La solution de cellulose et/ou le bain de précipitation contient un tensioactif. L'invention est caractérisée en ce qu'en b) on utilise une solution cellulosique et/ou un bain de précipitation dont la teneur en tensioactif (c) se situe dans la place 100 ppm > c > 5 ppm et un espace d'air d'une largeur comprise entre 2 et 20 mm. L'invention permet d'éviter toute détérioration ou d'importantes variations des caractéristiques textiles physiques des fibres ou filaments tissés malgré la largeur réduite de l'espace d'air.-

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