CROSSLINKED ACRYLIC MOISTURE-ABSORBING FIBER AND ITS PRODUCTION

摘要

PROBLEM TO BE SOLVED: To obtain crosslinked and moisture-absorbing acrylic fibers having >=10% saturated rate of moisture absorption, >=2.0 g/d dry strength and <=200% degree of swelling. SOLUTION: The crosslinked and moisture-absorbing acrylic fibers having >=10 wt.% saturated rate of moisture absorption at 20 deg.C and 65% RH, <=200 wt.% degree of swelling by water and >=2.0 g/d dry strength is be obtained by introducing a crosslinked structure by treating the acrylic fibers with hydrazine and successively hydrolyzing the treated fibers using sodium carbonate and controlling the nitrogen content to 15-20 wt.%. The fibers are excellent in a processability such as carding.