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Effects of Carbon Black on Toner Tribocharging in Two-Component Electrophotographic Developers

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A steady-state version of the surface state model of tribocharging is developed and compared to the effects of carbon black on tribocharaging of two-component developers. In this model, the rate of charging of the toner and the rate of discharging of the toner, because of increased conductivity related to the carbon content of the toner, are assumed to be equal at steady state.

Carbon black was found to have the following effects on the triboelectric properties of model toners made from carbon black in a polymer binder:

1. Increasing the carbon black content causes the absolute value of the charge-to-mass of model toners to decrease when the toner is charged positively or negatively using poly(methylmethacrylate) coated carrier or poly(vinylidine fluoride) coated carrier.

2. The ratio of q/m when the toner is charged positively to q/m when the same toner is charged negatively is a constant.

3. Increasing the carbon black content causes the absolute value of the slope and the intercept of linear plots of mass-to-charge as a function of the mass ratio of toner to carrier to increase.

The model predictions agree with these observations.

Document Type: Research Article

Publication date: January 1, 1999

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  • For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.

    Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.

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