EP 1315856 A1 20030604 - METHOD FOR PRODUCING CELLULOSE FIBERS AND CELLULOSE FILAMENT YARNS
Title (en)
METHOD FOR PRODUCING CELLULOSE FIBERS AND CELLULOSE FILAMENT YARNS
Title (de)
VERFAHREN ZUR HERSTELLUNG VON CELLULOSEFASERN UND CELLULOSE-FILAMENTGARNEN
Title (fr)
PROCEDE DE FABRICATION DE FIBRES CELLULOSIQUES ET DE FILS CONTINUS CELLULOSIQUES
Publication
Application
Priority
- DE 0103334 W 20010830
- DE 10043297 A 20000902
Abstract (en)
[origin: WO0218682A1] The invention relates to a method for producing cellulose fibers and cellulose filament yarns with improved properties on the basis of cellulose according to a dry-wet spinning method using aqueous aminoxides, especially N-methyl-morpholino-N-oxide as a solvent. The inventive method comprises the following steps: a) dispersing the cellulose and the aqueous aminoxide at an elevated temperature in a reactor, removing the water and subjecting the dispersion to shearing, thereby converting it to a homogeneous solution with a relaxation time in the range of from 0.5 to 80 seconds at 85 DEG C, b) feeding the solution to at least one spinning nozzle and shaping it, c) transporting the jet of solution through a non-precipitating medium while further shaping it, and d) precipitating the cellulose yarn or bunch of yarns, separating it from the precipitation bath via a deflection element and washing, treating to give softness and suppleness, drying and optionally cross-linking the product(s) in a multi-step post-dischargement treatment. In step a), a solution with a cuoxam degree of polymerization (DP) of the cellulose of >/= 450 is produced, said solution is shaped in steps b) and c) with a strain rate of (I). The reviving batch in step d) optionally also contains a cross-linking agent.
IPC 1-7
IPC 8 full level
D01F 2/00 (2006.01)
CPC (source: EP)
D01D 5/06 (2013.01); D01D 5/12 (2013.01); D01F 2/00 (2013.01)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 0218682 A1 20020307; AT E318947 T1 20060315; AU 8754201 A 20020313; CN 1211509 C 20050720; CN 1449460 A 20031015; DE 10043297 A1 20020321; DE 10043297 B4 20051208; DE 50109092 D1 20060427; EP 1315856 A1 20030604; EP 1315856 B1 20060301
DOCDB simple family (application)
DE 0103334 W 20010830; AT 01967050 T 20010830; AU 8754201 A 20010830; CN 01814739 A 20010830; DE 10043297 A 20000902; DE 50109092 T 20010830; EP 01967050 A 20010830