BLENDED POLYURETHANE ELASTIC YARN, METHOD FOR PRODUCING THE SAME AND ELASTIC FIBER STRUCTURE

• Main Authors: UEMURA YUJI, UMEZAWA MASAO
• Format: Patent
• Language: English
• Published: 02.12.2005
• Edition: 7
• Subjects: APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, ORYARNS; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; LAUNDERING; MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS; MECHANICAL FINISHING OF YARNS OR ROPES; NATURAL OR ARTIFICIAL THREADS OR FIBRES; SPINNING; TEXTILES; TREATMENT OF TEXTILES OR THE LIKE; WARPING OR BEAMING; YARNS; YARNS OR THREADS

PROBLEM TO BE SOLVED: To provide a polyurethane elastic yarn allowing thermobonding to be easily carried out by passing the yarn through a thermobonding process, and having high elasticity and high flexibility even after passing the thermobonding process. SOLUTION: The blended polyurethane elastic yarn comprises at least two kinds of polyurethane-based elastic fibers having ≥10°C difference in melting points at high temperature side. In other wards, the blended polyurethane elastic yarn is the blended yarn obtained by doubling the polyurethane elastic fiber having higher melting point at the high temperature side, with the polyurethane elastic fiber having the lower melting point at the high temperature side, and optionally is produced by subjecting the doubled elastic fibers after the doubling to a heat treatment or heat drawing at a temperature not lower than the heat deformation temperature of the polyurethane elastic fiber having the lower melting point at the high temperature side. COPYRIGHT: (C)2006,JPO&NCIPI