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Effect of Ground Calcium Carbonate Modified by Washless Multilayering of Polyelectrolytes on Paper Quality

무세척 고분자전해질 다층흡착 처리된 중질탄산칼슘이 종이의 품질에 미치는 영향

  • Lee, Jegon (Dept. of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University) ;
  • Im, Wanhee (Dept. of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University) ;
  • Sim, Kyujeong (Dept. of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University) ;
  • Lee, Hak Lae (Dept. of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University) ;
  • Youn, Hye Jung (Dept. of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University)
  • 이제곤 (서울대학교 농업생명과학대학 산림과학부) ;
  • 임완희 (서울대학교 농업생명과학대학 산림과학부) ;
  • 심규정 (서울대학교 농업생명과학대학 산림과학부) ;
  • 이학래 (서울대학교 농업생명과학대학 산림과학부) ;
  • 윤혜정 (서울대학교 농업생명과학대학 산림과학부)
  • Received : 2015.08.10
  • Accepted : 2015.08.20
  • Published : 2015.08.30

Abstract

In this study, we investigated influence of ground calcium carbonate (GCC) modified by washless multilayering of polyelectrolytes on paper quality. Three layers of polyelectrolytes (cationic starch/anionic polyacrylamide/cationic starch) were formed on the surface of GCC using laboratory inline washless polyelectrolytes multilayering system, which was called inline LbL GCC. Base papers were prepared with untreated GCC or inline LbL GCC using a laboratory handsheet former. These handsheets were coated with rod coater, and then printed by black ink. Properties of base paper and fold crack of coated paper were evaluated. Base paper with inline LbL GCC showed much higher mechanical strength in terms of tensile index, strain, internal bond strength, and folding endurance. The fold crack of coated paper with inline LbL GCC occurred more frequently compared to coated paper with untreated GCC. This might be due to highly improved internal bond strength of base paper, which resulted in smaller delamination that played a role of stress dissipation. It would be recommended to design a proper coating layer in order to prevent fold crack.

Keywords

References

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