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Developing Pigmented Inks for Thermal Ink Jet

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Particulate or pigmented inks for thermal ink jet applications exhibit great print quality, far superior to dye based inks. In this paper, we present concept for the development of kogation-free pigmented inks by imparting polymer latex into ink jet inks. Inks are prepared by the addition of polymer latex, and wherein the polymer latex can act as a stabilizer to improve the stability of pigmented ink. The polymer latex can also function as a binder with carbon black colorant or other color pigments, thereby impart the ink smear resistance, film hardness, and humidity resistance. The addition of polymer latex also develops a list of attributes such as high optical density, good latency, excellent light- and waterfastness, superior black MFLEN, good frequency response, and excellent cool curl and showthrough properties.

Polymer latexes are prepared by emulsion polymerization process. Polymer latexes that are useful in ink jet applications include ionic sulfonate polymer latex, epoxy polymer latex, polymer latex with a high glass transition temperature (Tg), or polymer latex with a nonionic surfactant with an HLB (hydrophilic/lipophilic balance) value from 17.5 to 20.

Document Type: Research Article

Publication date: January 1, 2002

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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