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Silica-Polymer Composite Particles for Toners: Synthesis, Characterization and Performance

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Evolution of toner technology together with a demand for faster printing puts new requirements on external additives used in toner formulations. Spacer particles, which are added to protect the toner surface from mechanical stress resulting from collisions with the particles of carrier or the doctor blade, have become a progressively more important part of the additives packages.

Polymeric particles, colloidal silica, and low surface area fumed silica are usually used as spacers. However, each of these materials has significant drawbacks. For instance, triboelectric charging properties of polymeric particles are not always optimal, large colloidal silica often drops off from toner surface, and low surface area fumed silica typically has broader than desired aggregate size distribution.

At the NIP28 conference we introduced the organic/inorganic composite spacer additives which combine benefits of polymeric and colloidal silica spacer additives [1]. We demonstrated that the new particles have lower drop off from the toner surface than colloidal silica additives.

In this paper we demonstrate how the new material particle size and shape could be controlled and present results of a print test where a model toner was formulated with the silica-polymer composite spacer additives.
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Document Type: Research Article

Publication date: 2013-01-01

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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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