Conductive composite fiber

Abstract

A conductive composite fiber is formed from a polymer containing conductive carbon black in a polyamide resin as a conductive layer and thermoplastic resin as a nonconductive layer that is exposed in three or more locations on the outside surface of the fiber in a cross section, the coefficient of variation in the surface area of each conductive layer in a fiber cross section is 10% or less, and the average value of the area specific resistance is 4 log (Ω·cm). The variation in the fiber surface specific resistance is suppressed and the variation in the exposed surface area of each conductive layer polymer in a fiber cross section is suppressed by exposure of the conductive layer in three or more locations on the fiber surface, crimping of the original yarn is suppressed by equal disposition, and antistatic performance for woven and knitted fabrics and carpets is improved.

1 - 3 . (canceled) 
     
     
         4 . A conductive composite fiber comprising:
 a polymer as conductive layers, the polymer containing a polyamide resin containing a conductive carbon black; and   a thermoplastic resin as a nonconductive layer,   wherein the conductive layers are exposed at three or more locations on an outside surface of the conductive composite fiber in a fiber cross section, a coefficient of variation (CV %) in area of the conductive layers in a fiber cross section is 10% or less, and the conductive composite fiber has an average value of a volume specific resistance of 4 log (Ω·cm) or less.   
     
     
         5 . The conductive composite fiber according to  claim 4 , wherein a CV % of angles formed by neighboring line segments each connecting a middle point of an exposed portion of each of the conductive layers on the outside surface of the conductive composite fiber in a fiber cross section and a center point of the fiber cross section is 5% or less. 
     
     
         6 . The conductive composite fiber according to  claim 4 , wherein the thermoplastic resin contains a polyamide or a polyester. 
     
     
         7 . The conductive composite fiber according to  claim 5 , wherein the thermoplastic resin contains a polyamide or a polyester.