D - Textiles – Paper – 01 – F
Patent
D - Textiles, Paper
01
F
D01F 2/00 (2006.01) D01D 4/02 (2006.01)
Patent
CA 2263183
The invention relates to a method for producing cellulose fibres of the lyocell type by processing a spinnable solution of cellulose in an aqueous tertiary amino oxide, by the dry/wet spinning method. The inventive method is characterized in that the solution used for spinning has between 0.05 and 0.70 % volume cellulose, in relation to the volume of the solution, with a molecular weight of at least 5x105. In this method, a spinneret can be used with over 10,000 spinning holes. These are so arranged that adjacent spinning holes are at most 3mm apart from each other, and that the linear density of the spinning holes is at least 20.
L'invention concerne un procédé de production de fibres de cellulose du type lyocell par transformation d'une solution filable de cellulose dans un oxyde d'amine tertiaire aqueux selon le procédé de filage à sec/au mouillé. Ce procédé se caractérise en ce que l'on utilise pour filer une solution qui contient entre 0,05 et 0,70 % en volume, par rapport au volume de la solution, de cellulose d'un poids moléculaire d'au moins 5x10<5>. Ce procédé permet d'utiliser une filière avec plus de 10.000 orifices de filage disposés de telle sorte que les orifices de filage adjacents soient mutuellement séparés d'au maximum 3 mm et la densité linéaire des orifices de filage soit égale à au moins 20.
Feilmair Wilhelm
Mulleder Eduard
Ruf Hartmut
Schrempf Christoph
Lenzing Aktiengesellschaft
Sim & Mcburney
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