Process for making cellulose extrudates

Details Process for making cellulose extrudates Process for making cellulose extrudates

D - Textiles, Paper

01

F

D01F 2/02 (2006.01) B60C 1/00 (2006.01) C08B 1/00 (2006.01) C08L 21/00 (2006.01)

Patent

CA 2197999

The invention pertains to a process for making cellulose extrudates from an optically anisotropic solution containing 94-100 wt.% of the following constituents: cellulose, phosphoric acid and/or its anhydrides, and water, by extruding the solution and then coagulating the formed extrudates, the extrudates being aftertreated such that after the aftertreatment the extrudates will have a degree of acidity which at least equals 7. Fibres obtained by this process possess particularly good thermal stability and are suitable for use as reinforcing material.

Procédé de fabrication d'extrudats de cellulose à partir d'une solution anisotrope sur le plan optique contenant 94 à 100 % en poids des constituants suivants: - cellulose, - acide phosphorique et/ou anhydrides de celui-ci, et - eau, ce procédé consistant à extruder la solution, puis à coaguler les extrudats formés, ceux-ci étant ensuite traités de telle manière qu'après ce traitement postérieur les extrudats possèdent un degré d'acidité égal au moins à 7. Les fibres obtenues à l'aide de ce procédé possèdent une stabilité thermique particulièrement bonne et elles sont appropriées à une utilisation en tant que matériau renforçateur.

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