Abstract
Triboelectrification in two-component development systems employing toner and insulative carrier has been studied by varying toner surface-area median size (d50), carrier surface-area median size (D50), specific weight of carrier (ρc), composition of methyl-methacrylate (MMA) /styrene (St) copolymer resin on the carrier surface, and concentration of carbon black in the toner binder of polyester resin. It has been found that toner surface-charge density (q/st) generated by triboelectrification with n partices of toner on a carrier particle is describable as a function of surface-area ratio of n toners to a carrier (nst/sc), on bases of contact electrostatic field (Ek) and geometrical or structural factors of toner and carrier (ft, fc).
