Abstract: A core-in-sheath type composite stretch yarn, having excellent stretchability and soft hand and capable of being dyed in dark colors, comprises a core portion constituted from a elastic yarn formed from at least one elastic fiber and having an ultimate elongation of 70% or more and a sheath portion formed from a non-elastic yarn comprising a plurality of non-elastic fibers having an ultimate elongation of 70% or more and surrounding around the core portion, and is useful for producing a woven or knitted stretch fabric having a high stretch percentage and capable of being dyed in dark colors.

Abstract: A polyester composite thick-and-thin multififament yarn having a natural fiber grandrelle yarn-like appearance and spun yarn-like appearance and hand is constituted from a polyester thick-and-thin multifilament yarn (A) having thick and thin portions alternately arranged with each other and a polyester multifilament yarn (B) having a high dyeability and a uniform thickness and, in each composite thick portion (a) of the composite yarn, the individual filaments of the yarn (B) forms a core part and the thick portions of the individual filaments of the yarn (A) are distributed around the core part to form a sheath part; and, in each composite thin portion (b) of the composite yarn, the individual filaments of the yarn (B) and the thin portions of the individual filaments of the yarn (A) are distributed in random mixture with each other; and, when the composite yarn is dyed, the composite thick portions (a) are colored in a lighter color and the composite thin portions (b) are colored in a darker color.

Abstract: A core-in-sheath type composite stretch yarn, having excellent stretchability and soft hand and capable of beinig dyed in dark colors, comprises a core portion constituted from a elastic yarn formed from at least one elastic fiber and having an ultimate elongation of 70% or more and a sheath portion formed from a non-elastic yarn comprising a plurality of non-elastic fibers having an ultimate elongation of 70% or more and surrounding around the core portion, and is useful for producing a woven or knitted stretch fabric having a high stretch percentage and capable of being dyed in dark colors.