PRODUCTION OF POLYURETHANE ELASTIC FIBER

• Main Authors: YOSHIMOTO SEI, FUJIMURA KAZUO
• Format: Patent
• Language: English
• Published: 13.06.1995
• Edition: 6
• 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 prevent polyurethane elastic yarn from sticking among the yarns, suppress the cob-webbing or collapsing of the yarn on a bobbin and obtain the high-quality polyurethane elastic yarn good in unwinding properties by applying a polyallylamine aqueous emulsion to yarn melt discharged from a spinneret and subsequently applying a nonaqueous oiling agent thereto. CONSTITUTION:This method for producing polyurethane elastic fiber comprises applying an aqueous emulsion containing a polyallylamine expressed by formula I [(n) is 20-20000] to yarn discharged from a spinneret and subsequently applying a nonaqueous oiling agent consisting essentially of a mineral oil or methylpolysiloxane, etc., thereto in melt spinning a polyurethane.