Abstract
The dependence of triboelectric charging characteristics of two-component developers on toner concentration is well known by our proposed new mode. We verify the proposed model of earlier works by using the several toner and carrier. The influence of charging site number on carrier surface by coating materials to toner charge is experimentally investigated. We examine the dependence of triboelectric charging characteristics of two-component developers on toner concentration by carrier surface's modification and get the results to fit the proposed model of toner triboelectric charging. The influence of coating materials on carrier surface to toner charge has been studied by the measurement of dependence of toner q/m on toner concentration.
The results of uncoated ferrite carrier are described as Type I characteristics (constant tribo-charge with toner concentration) and uncoated iron carrier are Type II characteristics (decreasing tribocharge with toner concentration). In the case of silicone coated carrier, according to the silicone materials, the triboelectric charging characteristics changed from Type I characteristics to Type II characteristics and still remained Type I characteristics. In the case of fluorine coated carrier, the triboelectric charging characteristics changed from Type I characteristics to Type III characteristics. In the cases of coated carriers, they exhibited all Types (Type I, Type II and Type III characteristics).
