CORE-SHEATH STRUCTURE SPUN YARN, AND WOVEN OR KNITTED FABRIC AND UNDERWEAR INCLUDING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a core-sheath structure spun yarn having high heat-retaining properties which are not lowered even after domestic washing is repeated, and a woven or knitted fabric and underwear including the same.SOLUTION: The core-sheath structure spun yarn is a core-sheath structure spun yarn (1) comprising a core component (2) and a sheath component (3). The core component (2) is a mixed spun fiber comprising soluble fibers (4a) and shrinkable fibers (5). The sheath component (3) is a mixed spun fiber comprising soluble fibers (4b) and cellulose fibers (6). The woven or knitted fabric or underwear is a woven or knitted fabric including the core-sheath structure spun yarn. The soluble fibers (4a, 4b) in the core component (2) and the sheath component (3) are fused and removed to form gap portions. A diameter (L2) of the yarn after fusion and removal is same as or greater than a diameter (L1) of the yarn before fusion and removal due to shrinkage of the shrinkable fibers (5) of the core component (2).