Loading patent…
AssigneeCentre Technique de L'Industrie des Papiers, Cartons et Celluloses et Technique Papetiere Avancee
InventorsPierre Monzie, Serge Chaunis, Pierre Goullioud, Patrick Laine
Estimating the term…
A method for manufacturing viscose filaments from a cellulosic starting material wherein a viscose is prepared from the cellulosic starting material, the viscose is extruded by passing it through a spinneret to form continuous thin strands, the extruded strands are passed continuously through a gaseous medium which contains at least one volatile agent of such a nature, and under such conditions, that a coagulating action on the said strands results, the strands which have thus been coagulated are then brought into contact with an acid medium which causes a pre-regeneration of the initial cellulose, so that the strands are converted to continuous filaments, and the filaments are passed through at least one other acid liquid medium which causes ultimate regeneration of the cellulose.
A method of manufacturing viscose cellulose regenerated filaments from a cellulosic starting material wherein a viscose is prepared from said starting material until a state of ripening close to its gelling point, the viscose in such a state is extruded by passing it through a spinneret to form continuous thin strands, the extruded thin strands are passed in a continuous way at first through an inert gaseous medium, but through a coagulating gaseous medium, then again the strands having thus been coagulated are brought into contact with an acid medium which causes a preregeneration of the initial cellulose converting the strands into continuous filaments, and said filaments are passed through at least one acid liquid medium which causes ultimate regeneration of the initial cellulose.
Dependencies are inferred from the claim text.