TREATMENT OF ACRYLIC FIBER

• Main Authors: YOSHIMOTO SEI, IWASAKI OSAMU, YAMAMOTO TOSHIHIRO, NAKAYAMA YASUAKI
• Format: Patent
• Language: English
• Published: 09.12.1988
• Subjects: APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; LAUNDERING; MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS; NATURAL OR ARTIFICIAL THREADS OR FIBRES; SPINNING; TEXTILES; TREATMENT OF TEXTILES OR THE LIKE; TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS,FABRICS, FEATHERS, OR FIBROUS GOODS MADE FROM SUCH MATERIALS

PURPOSE:To obtain an acrylic fiber having excellent separability, devitrification resistance and gloss, in high spinnability, by applying a specific amount of a specific lubricant to a swollen gel fiber bundle produced by wet-spinning, drawing and washing with water and heat-treating the coated bundle e.g. in hot-air drier. CONSTITUTION:An acrylic polymer is spun by wet-spinning, drawn and washed with water. A fiber bundle of swollen acrylic fiber gel produced by the above process is coated with 0.02-0.2wt.% (based on the weight of the fiber) of a lubricant produced by mixing (A) a propylene oxide/ethylene oxide block copolymerized polyether having an average molecular weight of 2,000-15,000 and (B) a polyoxyethylene alkyl ether. The lubricated fiber bundle is heat-treated with a roller drier having a surface temperature of 120-160 deg.C and/or a hot-air drier at 120-180 deg.C in dry state to effect the drying and densification of the fiber. The mixing ratio of the component A/B is preferably (90-60)/(10-40) by weight.