CELLULOSE-BASED ELECTROCONDUCTIVE THREAD AND CONTACT CHARGING BRUSH

摘要

PROBLEM TO BE SOLVED: To produce a cellulose-based electroconductive thread having the difference in electrical resistance values before and after a hot water treatment equal to or less than a specific value and a hot water shrinkage factor equal to or less than a specific value and suitable for charging brushes for electrophotographic copying machines, electrophotographic printers and the likes by bringing the yarn to contain electroconductive fine particles. SOLUTION: This cellulose-based electroconductive thread contains preferably 10-30 wt.% of electroconductive fine particles (preferably carbon black) and has <=5.0% difference in the electrical resistance values before and after a hot water treatment, <=5% coefficient of hydrothermal shrinkage, preferably <=0.3 standard deviation of variance in the electrical resistance in the longitudinal direction of the thread and preferably 108-1010Ω/cm electrical resistance in an atmosphere having humidity of 20% RH at 20 deg.C.