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Theory of Electric Field Detachment of Charged Toner Particles

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In the electrophotographic process, electric fields are used to detach and move charged toner particles from one surface to another. In principle, electric field detachment occurs when the applied electrostatic force overcomes the toner adhesion force to a surface. For triboelectrically charged toner, many measurements indicated that the electrostatic adhesion force of toner is much greater than that calculated for a uniformly-charged-dielectric-sphere model, suggesting that the surface charge distribution on a toner particle is nonuniform. In the present work, a triboelectric charging process is discussed for understanding the mechanism that causes a dumb-bell type charge distribution on toner particles, as previously found experimentally. The electrostatic force is computed for a dumb-bell type charge distribution on an isolated toner particle by means of a recently developed computational method using Galerkin finite-element technique. The effect of the relative spacing between electrodes on the electric field detachment of charged toner particles is examined in particular. The theoretical implication of electric field detachment of toner particles of different sizes is also discussed.
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Document Type: Research Article

Publication date: 1998-01-01

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  • For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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