A PROCESS AND A SPINNING LINE UNIT FOR WET SPINNING OF CELLULOSE FIBERS FROM AN ALKALINE SPIN BATH

摘要

A process for forming a fiber tow, involves a wet spinning procedure comprising the steps of: dissolving cellulose pulp in an alkaline aqueous solvent to form a cellulose spin dope composition, spinning the cellulose spin dope composition in a coagulation bath having a p H of more than 7.0, preferably a pH of at least 10, to produce a fiber tow, and passing the produced fiber tow through a sequence of consecutive stretching and washing steps in which the formed fiber tow is washed with a washing liquid by a counter-current flow washing procedure.