Utilization of Calcium Carbonate-Coated Wood Flour in Printing Paper and Their Conservational Properties

Yung Bum Seo, Dong Suk Kang and Jung Soo Han
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Yung Bum Seo: Department of Bio-based Materials, Chungnam National University, Yousung-Gu, Gung-Dong 220, Daejun 305-764, Korea
Dong Suk Kang: Department of Bio-based Materials, Chungnam National University, Yousung-Gu, Gung-Dong 220, Daejun 305-764, Korea
Jung Soo Han: Department of Bio-based Materials, Chungnam National University, Yousung-Gu, Gung-Dong 220, Daejun 305-764, Korea

Sustainability, 2019, vol. 11, issue 7, 1-9

Abstract: Wood flours (WFs) are bulky lignocellulosic materials that can increase the bulk and stiffness of paper. To be used in printing paper for replacing chemical pulp, WFs were first fractionated by a 200-mesh screen to improve smoothness; second, they were coated with calcium carbonate by an in-situ CaCO 3 formation method (coated wood flours, CWFs) to improve brightness. The performance of CWFs for printing paper was compared to those of bleached wood flours (BWFs) and bleached chemical pulp. Equivalent brightness and much higher smoothness were obtained for the CWFs compared to the BWFs. Furthermore, BWFs caused a significant loss of yield and required wastewater treatment in the bleaching process, while the CWFs increased the yield greatly by attaching CaCO 3 to the wood flours, and caused no wastewater burden. An accelerated aging test showed that the CWFs caused lesser brightness and strength loss than the bleached chemical pulp and BWFs. CWFs still had room for improvement to replace chemical pulp, but showed slower aging in optical and close strength properties.

Keywords: wood flours; in-situ CaCO 3 formation; brightness; smoothness; printing paper; conservational property (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2019
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