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Effect of Filler Distribution and Caliper Variations on Toner Transfer in Electrophotographic Printing

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Print density mottle in solid black electrophotographic printing was shown in a previous report to be strongly linked to the distribution of PCC fillers in paper. A model of toner transfer showed qualitatively that toner transfer efficiency is locally increased in regions of high filler density. In this report we extend the previous work by quantifying effect of filler distribution and of paper calliper variations on toner transfer in electrophotography. We modeled the complete electrostatic force field structure within a paper-air-toner transfer gap during electrophotography. By relating effective local dielectric constant to filler concentration, we computed the difference effects that surface and bulk PCC fillers have on the local toner transfer force field. The toner transfer force was found to be higher when the PCC filler was distributed homogeneously throughout the bulk thickness rather than localized at the surface of the paper. Quantitative model of in-plane variations in toner transfer force as a function of corresponding in-plane variations of the effective paper dielectric showed that the variation in paper dielectric on the scale of 500μm or larger contribute significantly to toner transfer force variations. We also found that the higher filler content amplified the effect of caliper non-uniformities on the toner transfer force variations.
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Document Type: Research Article

Publication date: 2004-01-01

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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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