Patent ID: 8287785

Claim:
A process for manufacturing solid regenerated viscose fibers comprising (1) spinning a viscose spinning dope through a spinneret comprising spinning holes into a regenerating bath thereby forming filaments, wherein said viscose spinning dope has an alkali ratio immediately before spinning of from 0.7 to 1.0, wherein at least part of said spinning holes have a circular orifice, wherein said regenerating bath contains from 70 to 120 g/l of sulfuric acid, from 240 to 380 g/l of sodium sulphate, from 20 to 50 g/l of zinc sulphate and wherein said regenerating bath has a temperature of from 45 to 55Â° C., (2) stretching said filaments after leaving said regenerating bath in a secondary bath and/or in air at a stretching ratio of from 70% to 90% of a maximum stretching ratio and (3) treating said filaments with a fatty acid ester thereby forming said fibers.