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http://dx.doi.org/10.7584/ktappi.2015.47.6.098

Studies on Deinking Properties of Recovered Paper for Manufacturing Eco-friendly Thermal Recording Paper  

Lee, Tai Ju (Changgang Institute of Paper Science and Technology)
Choi, Do Chim (Dept. of Paper Science & Engineering, College of Forest & Environmental Sciences, Kangwon National University)
Kim, Moon Sung (Daehan Paper)
Ryu, Jeong Yong (Changgang Institute of Paper Science and Technology)
Publication Information
Journal of Korea Technical Association of The Pulp and Paper Industry / v.47, no.6, 2015 , pp. 98-105 More about this Journal
Abstract
Demands of thermal recording paper have been increased significantly by increase in usage of invoice, fax, and label. Thermal recording paper was mainly made based on virgin fiber. It is necessary to find a suitable alternative to virgin fiber in terms of environment protectional resources conservation. In this paper, deinking properties of different recovered papers were analyzed in order to use the recovered paper as raw material of thermal recording paper. Recovered paper were ONP, OMG and white ledger. Flotation reject of OMG was high because inorganic pigments in coating layer could be removed by upstream of froth. Brightness of white ledger and OMG were much higher than that of ONP. Therefore, properties of pulp made from the recovered paper could be enhanced with increase in blending ratio of white ledger and OMG. However, blending ratio of OMG caused the increase of flotation reject. Consequently, the optimum blending ratio of ONP, OMG, and white ledger was 3:3:3 for eco-friendly thermal recording paper. Under the condition, brightness was about 70% and ERIC was below 300 ppm.
Keywords
Deinking; thermal recording paper; flotation; old newspaper; white ledger; old magazine;
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