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Fumed Metal Oxides for Non-Impact Printing Applications (NIP)

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Metal oxides like titanium, alumina and silica are key ingredients of dry based electrophotographic toners and ink jet paper coatings. Solid state parameters, like crystal structure, particle size, morphology and porosity favor their use in these applications. However, a variety of further requirements like tribochargeability, and stability, particle surface charge, in terms of powder toner applications and ink jet coatings, have to be fulfilled. As a consequence new surface chemistries of the metal oxides are required.

This presentation will focus on how metal oxides can be tailored for NIP applications. Special focus is given to synthetic amorphous silicas (SAS). The impact of selected physical-chemical features like particle size (primary, aggregate, agglomerate), surface chemistry (silylation), porosity (e.g. mesoporous for fumed metal oxides), particle surface charge (e.g. anionic or cationic), and their correlation to relevant application properties, for powder toners, like tribocharge and stability, flow, transfer efficiency, and cleaning, and for ink jet coatings, like adsorption and absorption capacity, gloss, waterfastness, and bleeding is discussed.

Newer technologies like chemically prepared toner (CPT) or photoglossy papers and their impact on metal oxides for NIP are considered.

In addition, EH&S aspects of SAS and an update on chemical legislation will be covered.

Document Type: Research Article

Publication date: January 1, 2006

More about this publication?
  • 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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