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Studies on the Improvement of Surface Properties and the Flow Properties of Coating Color (Part 2) : Influence of the Solid Content of Coating Color for Pre-coating on Surface Properties of Coated Board

도공액의 유동성 및 표면물성 개선에 관한 연구(제2보) : 프리코팅용 도공액의 고형분 농도가 도공판지의 표면물성에 미치는 영향

Kyoung-Mo Jeong
,
Jong-Myoung Won
,
Yong-Kyu Lee†
정경모
,
원종명
,
이용규 †
Department of Paper Science & Engineering, College of Forest & Environmental Sciences, Kangwon National University, Chuncheon, 24341
강원대학교 산림환경과학대학 제지공학과
†Corresponding author: E-Mail: yklee@kangwon.ac.kr
30 August 2017. pp. 89-96
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Abstract

In this study, to improve surface properties and the printability of coated board, five kinds of the pre-coating formulation were evaluated on the condition of high solid coating (solid content: 68 wt%-69.5 wt%). The main ingredients for coating formulation were prepared by three kinds of the inorganic pigments with different particle size distribution. In the coating formulation, although two kinds of precipitated calcium carbonate were applied to improve fluidity of the coating color, ground calcium carbonate was mainly used as coating ingredient in order to solve the rheological problems accompanying high solid coatings. The low and high shear viscosity of the coating colors were measured. Optical property and printability of the coated board samples were evaluated. As a result of the formulation of two PCCs with different particle sizes in GCC, the low shear viscosity was slightly increased, but the high shear viscosity was lowered and the runnability was improved. As a result of applying the coating color designed for this purpose, the gloss, brightness and whiteness of the coated board as well as the printing mottle and the ink set off were improved.

Keywords
Pigment formulation
pre-coating
high solids content
printability
References

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Information
  • Publisher :Korea Technical Association of The Pulp and Paper Industry
  • Publisher(Ko) :한국펄프종이공학회
  • Journal Title :Journal of Korea TAPPI
  • Journal Title(Ko) :펄프종이기술
  • Volume : 49
  • No :4
  • Pages :89-96
  • Received Date : 2017-08-04
  • Revised Date : 2017-08-18
  • Accepted Date : 2017-08-22
  • DOI :https://doi.org/10.7584/JKTAPPI.2017.08.49.4.89
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