Eccentric core-sheath composite false twisted yarn and woven/knitted fabric using same

Abstract

Provided is an eccentric core-sheath composite false-twisted yarn, in which, in a cross section of a composite fiber composed of two polymers that are a component A and a component B, the component A is completely covered with the component B, a ratio S/D of a minimum thickness S of a thickness of the component B covering the component A to a fiber diameter D is 0.01 to 0.1, a peripheral length of a fiber at a portion where a thickness is 1.05 times or less the minimum thickness S is ⅓ or more of a peripheral length of the entire fiber, a difference in modification degree between the single yarns is 0.2 or more, and a crimping rate is 30% or more.

1 . An eccentric core-sheath composite false-twisted yarn, comprising a multifilament composed of a single yarn in which, in a cross section of a composite fiber composed of two polymers that are a component A and a component B, the component A is completely covered with the component B, a ratio S/D of a minimum thickness S of a thickness of the component B covering the component A to a fiber diameter D is 0.01 to 0.1, and a peripheral length of a fiber at a portion where a thickness Is 1.05 times or less the minimum thickness S is ⅓ or more of a peripheral length of the entire fiber, wherein a difference in modification degree between the single yarns is 0.2 or more, and a crimping rate is 30% or more. 
     
     
         2 . The eccentric core-sheath composite false-twisted yarn according to  claim 1 , wherein a residual torque is 30 T/M or more. 
     
     
         3 . A woven/knitted fabric using the eccentric core-sheath composite false-twisted yarn according to  claim 1 . 
     
     
         4 . The woven/knitted fabric according to  claim 3 , wherein a KES surface roughness is 10 μm or less. 
     
     
         5 . The woven/knitted fabric according to  claim 3 , wherein wear resistance at 10% elongation is grade 3 or higher.