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Comparison between De-agglomerated and Traditional Fumed Silica External Additives and Their Performance in Toner Formulations

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De-agglomerated hydrophobized fumed silica is compared to corresponding traditional agglomerated fumed silica as an external additive for electrophotographic toners. The first finding is that the Tribo-Electrostatic Charge (T-ESC) of toner treated with de-agglomerated silica is as strong as that with traditional silica after agitation. Charge distribution analysis however indicates faster charge-up for de-agglomerated silica. These characteristics apply for both milled conventional toner and chemically produced toner and are explained by the superior dispersibility of de-agglomerated silica. The shelf-life (storage stability) was also tested and demonstrated that de-agglomerated silica maintained performance under normal appropriate storage conditions.
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Document Type: Research Article

Publication date: 2009-01-01

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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.

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