EP 1268888 B1 20051109 - METHOD AND DEVICE FOR THE PRODUCTION OF CELLULOSE FIBRES AND CELLULOSE FILAMENT YARNS
Title (en)
METHOD AND DEVICE FOR THE PRODUCTION OF CELLULOSE FIBRES AND CELLULOSE FILAMENT YARNS
Title (de)
VERFAHREN UND VORRICHTUNG ZUR HERSTELLUNG VON CELLULOSEFASERN UND CELLULOSEFILAMENTGARNEN
Title (fr)
PROCEDE ET DISPOSITIF POUR PRODUIRE DES FIBRES DE CELLULOSE ET DES FILS CONTINUS DE CELLULOSE
Publication
Application
Priority
- DE 0100901 W 20010306
- DE 10011948 A 20000311
Abstract (en)
[origin: US2003116882A1] Method for the production of cellulose fibers of -filaments from cellulose according to the dry-wet-extrusion method with aqueous amine oxides, especially N-methyl morpholine-N-oxide as solvent, where a) Cellulose or a cellulose mixture is dispersed in aqueous amine oxide with a Cuoxam-DP in the range of 250 to 3000, b) the dispersion obtained in this way is converted at increased temperature and under dehydration and shearing into a homogenous solution with a zero shear viscosity in the range of 600 to 6000 Pa.s and with a relaxation time in the range of 0.3 to 50 s, at 85° C. respectively, c) the solution is supplied to at least one spinning nozzle and first guided through an impaction chamber that is shared by one and/or the nozzle(s), where the dwelling time [of the solution] is at least equal to its relaxation time at the spinning temperature, d) the solution is formed in each spinning nozzle into at least one capillary and the capillary/capillaries of each nozzle are guided under draught through a non-precipitating medium and then through a spinning bath under precipitation of the cellulose threads, and e) the cellulose threads are separated from the spinning flows by deflection at the end of the spinning bath drawing frame and the threads are pulled, characterized in that in step d), the capillary assemblage(s) are impacted with a gas under an angle alpha to the direction of the capillary run in a range of 45°<alpha<90° shortly before they enter the spinning bath.
IPC 1-7
IPC 8 full level
CPC (source: EP KR US)
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)
US 2003116882 A1 20030626; US 6887409 B2 20050503; AT E309400 T1 20051115; AU 8146701 A 20010924; CN 1205364 C 20050608; CN 1416481 A 20030507; DE 10190965 D2 20030508; DE 50107999 D1 20051215; EP 1268888 A1 20030102; EP 1268888 B1 20051109; KR 100760642 B1 20071004; KR 20020081580 A 20021028; WO 0168958 A1 20010920
DOCDB simple family (application)
US 22087002 A 20021029; AT 01957604 T 20010306; AU 8146701 A 20010306; CN 01806297 A 20010306; DE 0100901 W 20010306; DE 10190965 T 20010306; DE 50107999 T 20010306; EP 01957604 A 20010306; KR 20027010494 A 20020813