Synthetic fiber capable of absorbing and disabsorbing moisture, entangled yarn blend using the same, knitted and woven goods using the same, and nonwoven fabric using the same

摘要

A synthetic fiber capable of absorbing and disabsorbing moisture comprising a component capable of absorbing and disabsorbing moisture and a fiber-forming polymer. The fiber of the present invention has a moisture absorption of 1.5% or more when it is allowed to reach a moisture equilibrium under the circumstance of 25° C.x60%RH and then is allowed to stand for 30 min. under the circumstance of 34° C.x90%RH, and has a moisture disabsorption of 2% or more when it is allowed to reach a moisture equilibrium under the circumstance of 34° C.x90%RH and then is allowed to stand for 30 min. under the circumstance of 25° C.x60%RH. The fiber also has a value of -1 to 5 in terms of b value in the CIE-LAB color system when it is allowed to stand for 30 days.