Moisture-absorbing core-sheath composite yarn, and fabric

Abstract

A moisture-absorbing core-sheath composite yarn has a sheath polymer made of a polyamide, a core polymer is a polyetheresteramide copolymer, and the strength retention after a 150° C. 1-hour dry heat treatment is 50% or higher. The core-sheath composite yarn has high moisture-absorbing performance, is more comfortable than natural fibers, and can retain the soft texture, durability, and moisture-absorbing/releasing performance even when laundered and dried repeatedly.

1 - 3 . (canceled) 
     
     
         4 . A hygroscopic core-sheath composite yarn comprising polyamide as a sheath polymer and a polyether ester amide copolymer as a core polymer, the yarn having a strength retention rate of 50% or more after undergoing dry heat treatment at 150° C. for 1 hour. 
     
     
         5 . The hygroscopic core-sheath composite yarn as set forth in  claim 4 , having a ΔMR value of 5.0% or more and a ΔMR retention rate of 70% or more after undergoing dry heat treatment at 150° C. for 1 hour. 
     
     
         6 . A fabric comprising, at least partly, a hygroscopic core-sheath composite yarn as set forth in  claim 4 . 
     
     
         7 . A fabric comprising, at least partly, a hygroscopic core-sheath composite yarn as set forth in  claim 5 .