| 摘要 |
PROBLEM TO BE SOLVED: To provide a stretchable mixed yarn with yarns having different finenesses, equipped with an elegant dignity, a highly stretchable property, tenacity, a body, a resilient feeling, a puffy feeling and a soft feeling without having crimps and wrinkles. SOLUTION: This stretchable mixed yarn with yarns having different finenesses consists of at least >=3 kinds of filament yarns, in which whole single yarns constituting the mixed yarn of which at least its high viscosity component is a polytrimethylene terephthalate, are side by side type conjugated yarns; the mixed yarn consists of (A) thin fineness yarns of 0.5-3.0 dtex single yarn fineness, (B) middle fineness yarns of 0.7-5.0 dtex single yarn fineness and (C) thick fineness yarns of 3.0-15.0 dtex single yarn fineness; the number of filaments (Fa) of the thin fineness yarns is 29 fold of that of the thick fineness yarns (Fc) and >=2 fold of that of the middle fineness yarns (Fb); and also the 1.8×10<-3> cN/dtex elongation rate stretched and contracted under a load of the mixed yarn is >=20%.
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