Patent ID: 11946165
Assignee: AUROTEC GMBH
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC D | IPC D

Claim 19:
20. A method for producing solid cellulose filaments from a cellulosic fluid, the method comprising the steps of: extruding said fluid through a plurality of extrusion openings, whereby fluid filaments are formed; solidifying said filaments in a coagulation bath; wherein the filaments are bundled and deflected as a bundle in the coagulation bath in order to be drawn from the coagulation bath above the coagulation bath level; the extrusion openings are arranged within a length LL and the bundle of filaments resting on a deflection device occupies a deflection width L which is at least 80% of the length LL; and
the bundle of filaments occupies a deflection width Loutside on a deflection device provided outside the coagulation bath, which is controlled according to the formula:

L>(2×LZ×cos(B/2)×v2,5)/(10×ccell0,5×Q),, wherein Loutside is the deflection width of the bundle in mm, LZ is the number of extrusion openings, B is the deflection angle (calculated as 180° minus the wrap angle of the filaments around the deflection device in angular degrees), v is the speed of the filaments in meters per second, ccell is the cellulose concentration of the extruded fluid in % by mass and Q is a dimensionless load number, wherein Q is 300 or lower.