METHOD FOR PRODUCING HIGHLY CRIMPED REGENERATED CELLULOSE FIBERS BY SOLVENT STRETCHING

摘要

Highly crimped regenerated cellulose fibers can be obtained by stretching filaments containing the reaction product of cellulose xanthate and formaldehyde in a non-aqueous liquid having a boiling point of at least 80 DEG C. and maintained at a temperature of 60 DEG C to 150 DEG C, relaxing said filaments in an incompletely regenerated state in an aqueous solution having a swelling action on the filaments and maintained at a temperature of 30 DEG C to 90 DEG C and then subjecting the filaments to regeneration treatment to complete regeneration.