| abstract |
The present invention concerns a process for the manufacture of solid regenerated viscose fibres, comprising the steps of: - spinning a viscose spinning dope through a spinneret comprising spinning holes into a regenerating bath thereby forming filaments, - said viscose spinning dope having an alkali ratio immediately before spinning of from 0.7 to 1.0, preferably from 0.8 to 0.9, - at least part of said spinning holes having a circular orifice, - said regenerating bath containing - from 70 to 120 g/l, preferably 90 to 110 g/1 sulfuric acid, - from 240 to 380 g/l, preferably 330 to 370 g/l sodium sulphate, - form 20 to 50 g/l, preferably 25 to 35 g/l zinc sulphate and said regenerating bath having a temperature of from 45 to 55°C, preferably 48 to 50°C, - 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 %, preferably 80 % to 90 % of the maximum stretching ratio as hereinbefore defined and - treating said filaments with a fatty acid ester. |