Abstract:

In order to develop and extend the application of carbon black conductive fiber, the morphological structure of conductive fiber was characterized by stereo-microscope and scanning electron microscopy, and the resistance of conductive yarns in different carbon black content and fineness were tested under the standard normal atmospheric condition. The regression curves of the resistance of conductive yarns and the measuring length were drawn. The influence of heat setting temperature and washing times on the electrical properties of conductive yarns were analyzed and compared. The results show that carbon black on the surface of the fiber improves the mechanical properties of nylon fiber. The conductive properties of the fiber with higher carbon black content are better than that with low carbon black content.The resistance of conductive yarns is proportional to their length and inversely proportional to the cross section. The resistance value of the polyamide conductive yarn decreases with temperature. Yarn heat teratment temperature is not higher than 120°C. Almost no effect of washing times exists on the conductivity of conductive nylon yarn, and yarnconductive properties are stable.

Key words: conductive fiber, carbon black, washing treatment, heat setting, conductive property