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Silica Nanoparticles: Design Considerations for Transparent and Glossy Inkjet Coatings

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Inkjet technology is finding utility in a variety of applications ranging from advertising, packaging, proofing, and the in-home printing of photographs. In many applications transparency of the inkjet coating is a critical parameter. Transparent media is widely used for graphic displays, window advertisements, and backlit applications. Ink receptive transparent coatings are also critical in glossy photographic media, especially transparency of the topcoat in multiple layer architectures. A transparent and glossy top layer is highly desirable and in most cases clarity correlates with gloss. It is generally accepted that a high degree of topcoat transparency translates to high printed color optical density.

Silica nanoparticles are used in highly pigmented topcoats to create a porous structure, which traps the colored elements of the ink and lets the carrier liquid pass through to the underlying absorptive layer. In some cases nanoparticles are used in clear films to improve its mechanical properties.

This paper describes two studies. Study I investigated the impact of the properties of silica nanoparticles on the clarity, gloss and printability of inkjet coating films. An experimental design was used to evaluate silica nanoparticles in combination with various binders. In Study II we explored the impact of acetoacetylated polyvinyl alcohols combined with different silicas on the transparency and gloss of the film.

Document Type: Research Article

Publication date: 2005-01-01

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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