PROCESS AND A SPINNING LINE UNIT FOR WET SPINNING OF CELLULOSE FIBERS FROM AN ALKALINE SPIN BATH
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United States of America
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Issued Date -
Feb 13, 2025
app pub date -
Oct 31, 2024
filing date -
Oct 31, 2024
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Abstract
A process for forming a fiber tow, involves a wet spinning procedure comprising: 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 pH 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.
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