Processing for spinning alkaline cellulose spin dope

A process for spinning an alkaline cellulose spin dope, comprising dissolved cellulose, to cellulose filaments, the process comprising the steps of:

• feeding the alkaline cellulose spin dope to at least one spinning head (20) with a plurality of holes, wherein the spinning head comprises at least two parallel, rectangular spinneret dies, each with a plurality of holes, the spinneret dies being arranged spaced apart with a flow spacing in between them;
• extruding the alkaline cellulose spin dope through the plurality of holes into a flow of aqueous alkaline coagulation bath liquid, the aqueous alkaline coagulation bath liquid comprising a sodium coagulation salt, whereby forming cellulose filaments, wherein the aqueous alkaline coagulation bath liquid flows through the flow spacing and then past the spinneret dies in a flow direction, the flow direction of the aqueous alkaline coagulation bath liquid being parallel to the direction in which the alkaline cellulose spin dope is extruded into the aqueous alkaline coagulation bath liquid;
• and
• withdrawing the cellulose filaments from the aqueous alkaline coagulation bath liquid;
• wherein the spinning head comprises at least three, preferably three to seven, rectangular spinneret dies, preferably having flow spacings between each of them;
• and/or wherein the rectangular spinneret dies have a length:width ratio of at least 5:1, such as a length:
• width ratio of 5:1 to 200:1, or a length:
• width ratio of 10:1 to 100:1;
• preferably the rectangular spinneret dies each has a continuous rectangular surface with a plurality of holes.