POLYESTER-BASED COMBINED UNDRAWN FILAMENT YARN

摘要

PROBLEM TO BE SOLVED: To obtain a polyester-based combined undrawn filament yarn excellent in processability of the yarn and generability in a higher-order process and capable of improving feeling properties such as a bulking feeling, a grain feeling, coloring properties, a dry feeling, water absorptivity and a rebounding feeling. SOLUTION: This polyester-based combined undrawn filament yarn is formed from two filament groups which are a filament group composed of a copolyester and a filament group composed of a polyester without copolymerized and satisfies the following properties: (1) combined ratio of the filament group composed of the copolyester: 30-70%, (2) elongation at break (E): 110=E): 0<ΔE<20 (%) >=E (%)=[(Eb-Ea)/Ea]×100; Ea: elongation at break (%) of the filament group composed of the copolyester; and Eb: elongatio at break (%) of the filament group composed of the polyester without copolymerized} and (4) number of interlacing (CF): 2-10 number/m.