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.
A pile fabric comprises a base fabric and a pile layer composed of many cut piles extending from at least one face of the base fabric, and has a pile length of from 2 to 30 mm. The pile yarns forming the cut piles are core-sheath type composite yarns each comprising a core portion composed of thick fibers (preferably filaments) having a single fiber size of from 5 to 55 dtex and a sheath portion that is composed of thin fibers (preferably filaments) having a single fiber size of from 0.01 to 2.5 dtex, and that surrounds and covers the core portion. The pile fabric is excellent in the dust removal effect during wiping, and resistance to laying flat, and is useful as a fabric for cleaning.
