Patent ID: 7922943

Claim:
A method for producing endless fine threads from a spinning material made of cellulose dissolved in a solvent, in which the dissolved cellulose is spun from at least one spinning orifice and the spun thread is drawn by gas flows which are constantly accelerated to a high speed by means of a Laval nozzle, the gas flow in the region of the fiber formation being substantially laminar, at least one of the temperature of the spinning material, the temperature of the thread exiting from the spinning orifice, the pressure before the Laval nozzle and the pressure after the Laval nozzle is controlled such that the thread reaches a pressure in its interior before solidifying which is greater than the gas pressure surrounding it, in such a manner that the thread splits and fans out into a multiplicity of fine threads, whereby in the drawing region water or steam is injected in order to start coagulation.