| 摘要 |
PURPOSE: A polyester combined filament yarn comprising two kinds of polyester yarns which are different in thermal shrinkage characteristics is provided. Therefore, a fabric weaved with the polyester filament yarn has excellent drape properties and bulkiness as well as a smooth feeling. CONSTITUTION: This polyester filament yarn obtained by intermingling a polyester filament fiber group(A) as a core yarn and a polyester filament fiber group(B) as a sheath which simultaneously satisfy the following formula: (1) 0%<BWS(A)<25%, (2) H-BWS(A)<=0% and (3) -20%<H-BWS(B)<=0%. In formula, BWS(A) exhibits a heat shrinkage rate of the polyester filament fiber group(A) at 98deg.C, H-BWS(A) exhibits a heat shrinkage rate of the polyester filament fiber group(A) measured at 98deg.C after treatment at a vacuum steam set(80deg.C, 30min) or sizing(95deg.C) heat treatment, and H-BWS(B) exhibits a heat shrinkage rate of the polyester filament fiber group(B) measured at 98deg.C after treatment at a vacuum steam set(80deg.C, 30min) or sizing(95deg.C) heat treatment.
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