D - Textiles – Paper – 01 – D
Patent
D - Textiles, Paper
01
D
18/612
D01D 5/247 (2006.01) D01D 5/34 (2006.01) D01F 1/08 (2006.01) D01F 6/18 (2006.01)
Patent
CA 1163071
Cross-sectionally stable, hygroscopic fibers and filaments having a core-jacket structure and a process for their production Abstract of the Disclosure Hygroscopic filaments or fibers with a core-jacket structure of hydro- phobic, filament-forming synthetic polymers having a water retention capacity of at least 10 % and having uniform round to oval cross-sectional profiles are ob- tained by a dry-spinning process which comprises addition of a substance to the spinning solvent which a) has a higher boiling point than the spinning solvent used, b) is readily miscible with -the spinning solvent and with water, c) is a non-solvent for the polymer to be spun, and addition of another substance which a) is soluble in the non-solvent for the polymer to be spun b) is soluble in the solvent for the polymer, c) remains dissolved in the non-solvent for the polymer during solidification of the filaments, d) is insoluble in water, and e) does not evaporate to any significant extent during the spinning process, to the system in quantities of at least 1 % by weight, based on polymer solids/ spinning solvent/non-solvent carrying out the spinning process in such a way that the non-solvent does not evaporate to any significant extent in the spinning duct and washing out the non-solvent from the solidified filaments.
365567
Herbertz Toni
Jungverdorben Hermann-Josef
Reinehr Ulrich
Aktiengesellschaft Bayer
Fetherstonhaugh & Co.
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