Process for dry spinning yarns of improved uniformity and reduced adhesion

Claim 1

In a process for dry spinning yarns, in which a polymer solution containing a solvent is forced into a spinning shaft charged with hot spinning gas through bores of an annular spinning nozzle to produce spinning yarns and the solvent is then evaporated from the yarns, the temperature of the shaft wall and of the spinning gas being higher than that of the spinning solution, the improvement comprising introducing the spinning gas by a cylindrical gas distributor disposed concentrically within the annular spinning nozzle and extending 50 to 200 mm below the nozzle and having a gas permeable axial surface along the length thereof and a gas impermeable radial surface at the bottom thereof to blow the yarns with the spinning gas at a velocity and flowing only radially from the inside to the outside in an upper part of said shaft, said velocity of the radial flow of gas directly below the spinning nozzle and within a spacing of 10 mm from the nozzle, increasing from 0 to at least 0.2 to 1 m/s transverse to the running direction of the yarns to thereby produce yarns of improved uniformity and reduced adhesion.