LONG AND SHORT COMPOSITE SPUN YARN EXCELLENT IN MOISTURE ABSORBING AND RELEASING PROPERTY AND ABRASION RESISTANCE, AND WOVEN OR KNITTED FABRIC

摘要

To provide a long and short composite spun yarn which exhibits an excellent moisture absorbing performance under an uncomfortable high humidity, and can provide a comfortable environment within clothing by diffusing absorbed moisture and dissipating heat in a low humidity environment where moisture absorption is not necessary, and also excels in abrasion resistance.SOLUTION: There is provided a long and short composite spun yarn which has a core-sheath structure consisting of a core part composed mainly of an acrylonitrile-based polymer and a sheath part composed mainly of a polymer having a crosslinked structure and carboxyl groups and at least partially uses acrylic fibers having 0.050 to 0.080 of A represented by the following formula. The long and short composite spun yarn is characterized in that a difference in the moisture absorption rate between 20°C and 70% RH and 20°C 95% RH is 1.0 to 5.0% and a cohesion power value is 300 or more cycles. A=amount of carboxyl group [mmol/g]/ratio of the area occupied by the sheath part in the cross section of the fiber.SELECTED DRAWING: Figure 3