PRODUCTION OF SILKY FALSE-TWIST TEXTURED YARN

摘要

PURPOSE:To obtain the subject textured yarn having feeling and appearance resembling those of a non-false twisted yarn without changing the feeling in dyeing, etc., by doubling plural yarns containing polyester yarns having a in breaking elongation difference, interlacing the resultant doubled yarn, false twisting the doubled yarn at a low twist heat-setting temperature and a small number of false twists and resubjecting the false twisted yarn to heat treatment. CONSTITUTION:Plural yarns containing two polyester fiber yarns (e.g., polyethylene terephthalate fiber yarn) having =50% breaking elongation difference are doubled and false twisted or (simultaneously or continuously) draw-false twisted. In the process, the resultant doubled yarn is subjected to interlacing treatment before false twisting or draw-false twisting to impart interlaces of =25 counts/m thereto. The interlaced yarn is subsequently false twisted at a low twist-setting temperature within the range of 80-150 deg.C at a small number of false twists satisfying the formula [Tw is the number of false twists; Dr is the size (denier) of yarn after drawing] and resubjected to heat treatment at a temperature above the low twist-setting temperature to afford the aimed false-twist textured yarn.