Designing Pigments for Optimal Performance in Chemical Toners
Abstract:Carbon black has historically been used in electrophotographic toners as a black pigment. Its properties influence some of the key performance attributes of the toner, including the printed image density and the toner's electrical characteristics. In the last decade demand for higher resolution and lower cost printing has driven significant improvements in toner performance. These changes have shifted the production of new toners from the conventional pulverization process to more complex chemical processes. In these new processes, carbon black and the other pigments are typically first dispersed into a liquid matrix (aqueous or organic solvent or monomer) and are then incorporated into the toner particle either by chemical assembly processes, such as emulsion aggregation, or direct polymerization. Throughout the various process steps the carbon black needs to remain dispersed in the matrix to optimize the performance.
Cabot has developed surface modification technology that allows the design of the carbon black surface chemistry to match the properties of its surrounding matrix. In this presentation we will explore the sensitivity of the carbon black dispersion quality to changes in the polymer properties. We will also demonstrate how careful control of the surface chemistry can enhance the dispersion of the carbon black.
Document Type: Research Article
Publication date: 2008-01-01
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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