| 摘要 |
PROBLEM TO BE SOLVED: To obtain a conductive composite fiber that is stably produced without troubles of end breakages in spinning and has excellent conductive performance by properly combining the melting points and the melt viscosities of a conductive component and a nonconductive component and to provide a method for producing the same. SOLUTION: In the conductive composite fiber obtained by bonding a conductive thermoplastic resin (resin A) containing conductive carbon black to a polyester-based thermoplastic resin (resin B) having a melting point of equal to or smaller than the melting point of the resin A+15°C, the ratio (η<SB>a</SB>/η<SB>b</SB>) of the melt viscosity (η<SB>a</SB>) of the resin A to the melt viscosity (η<SB>b</SB>) of the resin B is 0.4-2.5, the cross-sectional shape of a single filament is a shape in which the resin A is exposed to the surface of the filament in a rotational symmetry at two or more points and the boiling water shrinkage percentage is≤12%. COPYRIGHT: (C)2007,JPO&INPIT
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