Electric Treatment assisted inkjet ink flotation deinking, 2015 PEERS Conference

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Inkjet inks have been widely used due to higher printing speed, competitive cost and healthy non-organic solvent. However, since the hydrophilic property and sub-micron size, the inkjet inks are considered as non-deinkable. The residual ink in pulp is detrimental to the pulp quality. Furthermore, the high ink concentration in filtrate makes the phenomenon even worse because most paper mills are closure in water. Currently there are several optimizations in pulping stage to prevent the redeposition and improve deinking efficiency, including enzyme deinking, neutral pulping, and adsorption deinking. Electric treatment was utilized in this study to improve the flotation efficiency.