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Attempts to Improve the Deinkability of Ink jet Inks

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Deinkability of inkjet printed waste papers was assessed by flotation deinking method with fatty alcohol derivative as a deinking agent. Though inkjet inks are easily detached from the waste paper, detached inks are too small to be rejected out in the flotation cell. In order to increase the flotation efficiency, the kneading process was omitted and fatty acid or new ink collector was added in the flotation cell. Consequently, the brightness of the deinked pulp sheet obtained after flotation increased markedly. From these results, when the collected waste papers are only inkjet printings, inkjet inks are said to be deinkable by the current deinking line. But practically, waste papers are mixtures of digital and offset printings, since they are not classified by their printing types. When the electrophotography printed waste papers are deinked, strong shearing power is needed, consequently kneading cannot be avoided. It is necessary to establish the deinking method and develop the deinking agents and/or systems for mixed ondemand printings in early stage.

Document Type: Research Article

Publication date: January 1, 2010

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  • 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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