D - Textiles – Paper – 01 – D
Patent
D - Textiles, Paper
01
D
18/612
D01D 5/04 (2006.01) D01F 1/08 (2006.01) D01F 6/18 (2006.01) D01F 6/54 (2006.01) D01F 8/04 (2006.01) H05B 3/34 (2006.01)
Patent
CA 1097864
ABSTRACT OF THE DISCLOSURE The invention relates to hygroscopic filaments and fibres of syn- thetic high polymers selected from filament-forming acrylonitrile polymers of which at least 50% by weight consists of acrylonitrile units, and linear aromatic polyamides. The improved hygroscopicity compared with known synthetic fibres is due to the fact, that in a conventional dry-spun process a liquid is added to the spinning solvent which liquid has a higher boiling point than the spinning solvent used, which liquid is readily miscible both with the spin- ning solvent and water and which represents a non-solvent for the polymer to be spun. The polymer solution is dry spun using a spinning duct temperature of not more than 80°C above the boiling point of the spinning solvent and under such conditions that no substantial evaporation of the added liquid takes place, after-treating the spun filament including washing same in an aqueous washing bath to remove substantially all of the added liquid and any spinning solvent from the filament, drying the washed filament, and, where required, cutting the filament to form fibres.
266895
Herbertz Toni
Jungverdorben Hermann-Josef
Reinehr Ulrich
Aktiengesellschaft Bayer
Fetherstonhaugh & Co.
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