Journal of Korea Technical Association of The Pulp and Paper Industry (펄프종이기술)

Korea Technical Association of the Pulp and Paper Industry (한국펄프종이공학회)
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Effect of PVOH or polyDADMAC Addition on Surface Sizing with Oxidized Starch

PVOH와 polyDADMAC 첨가에 의한 산화전분의 표면사이징 효과 변화

  • Seo, Dongil (Dept. of Forest Sciences, Seoul National University) ;
  • Jeong, Young Bin (Dept. of Forest Sciences, Seoul National University) ;
  • Jeong, Kwang Ho (Dept. of Forest Sciences, Seoul National University) ;
  • Lee, Hak Lae (Dept. of Forest Sciences, Seoul National University) ;
  • Youn, Hye Jung (Dept. of Forest Sciences, Seoul National University)
  • 서동일 (서울대학교 농업생명과학대학 산림과학부) ;
  • 정영빈 (서울대학교 농업생명과학대학 산림과학부) ;
  • 정광호 (서울대학교 농업생명과학대학 산림과학부) ;
  • 이학래 (서울대학교 농업생명과학대학 산림과학부) ;
  • 윤혜정 (서울대학교 농업생명과학대학 산림과학부)
  • Received : 2013.07.02
  • Accepted : 2013.07.30
  • Published : 2013.08.30
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Abstract

High loading of printing and writing grades with fillers has many advantageous aspects in papermaking because it allows decreasing fiber use and reducing manufacturing cost. High loading technology, however, has some disadvantageous aspects as well. It decreases physical properties of papers, especially strength properties. The problem associated with high loading can be reduced by applying surface sizing starch solution onto paper surface. It is important to control the penetration of the surface sizing starch solution into paper web to obtain the desired property improvement. In this study, the effect of the addition of two polymers into starch solution on paper properties has been examined. PVOH and polyDADMAC were used as polymeric additives for surface sizing with oxidized starch. Viscosity of starch solutions and surface roughness of dried starch films on glass slides showed that some interactions between polymeric additives and oxidized starch have been occurred and the most extensive interaction with starch solution was obtained with high molecular weight polyDADMAC. Low molecular weight PVOH was most effective in improving folding endurance and internal bond strength. On the other hand, polymer addition showed no effect on surface strength of paper. This indicates that not the level of starch holdout but the bonding strength of starch itself has predominant influence on surface strength of paper.

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References

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