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Paper Strength Improvement by Anionic PAM and Cationic Starch Adsorbed PCC

음이온성 PAM과 양이온성 전분으로 도포된 경질탄산칼슘에 의한 종이 강도 향상

  • Choi, Do-Chim (Dept. of Paper Science & Engineering, College of Forest & Environmental Sciences, Kangwon National University) ;
  • Choi, Eun-Yeon (Dept. of Paper Science & Engineering, College of Forest & Environmental Sciences, Kangwon National University) ;
  • Won, Jong Myoung (Dept. of Paper Science & Engineering, College of Forest & Environmental Sciences, Kangwon National University) ;
  • Cho, Byoung-Uk (Dept. of Paper Science & Engineering, College of Forest & Environmental Sciences, Kangwon National University)
  • Received : 2013.02.08
  • Accepted : 2013.02.19
  • Published : 2013.02.28

Abstract

Fillers have been used for printing paper to improve printability, sheet formation and optical properties and to reduce production costs by replacing expensive wood pulps. However, an increased filler content will decrease paper strength because filler particles interfere with fiber-fiber bonding. In order to increase filler content without sacrificing too much paper strength in high filler content papers, the surface of precipitated calcium carbonate (PCC) has been modified by adsorbing anionic polyacrylamide and cationic starch in series. The adsorbed polymer layers would enhance interactions between the filler surface and the fiber surface, improving internal bonding. It was found that the modified PCC increased paper strength at a given filler content compared to the coventional method. Negligible differences in optical properties and formation of paper, filler and fines retention and drainage on the wire section were observed between the modified and the conventional PCC. However, the decreased bulk of paper was observed when the modified PCC was used.

Keywords

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