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2021 Vol.53, Issue 2 Preview Page
Wet Pressing Effects of Hybrid Calcium Carbonate in Papermaking
Min Woo Lee12
,
Sun Young1
,
Yung Bum Seo3†
1Department of Biobased Materials, College of Agriculture and Life Sciences, Chungnam National University, Daejeon, 34134, Student
2Hansol Paper Co. Ltd., R&D Center, Daejeon, 34326, Senior Researcher
3Department of Biobased Materials, College of Agriculture and Life Sciences, Chungnam National University, Daejeon, 34134, Professor
†Corresponding author: E-Mail: ybseo@cnu.ac.kr (Address: Department of Biobased Materials, College of Agriculture and Life Sciences, Chungnam National University, Daejeon, 34134, Republic of Korea)
30 April 2021. pp. 24-31
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Abstract

Raising solid content at wet pressing process saves drying energy greatly. Application of hybrid calcium carbonate (HCC) in printing paper may help to achieve high solid contents without sacrificing bulk and stiffness of paper. HCC is prepared by pre-flocculating calcium oxide and ground calcium carbonate (GCC) with ionic polymers, and by injecting carbon dioxide to the pre-flocculated flocs until termination of the reaction at neutral pH. When used in papermaking, HCC gave higher bulk, higher stiffness, and higher tensile strength than GCC did. We may compromisingly reduce high bulk of the HCC containing paper by applying higher wet pressing pressure and increase solid content while keeping still higher bulk and stiffness than the GCC containing paper. Actually, we achieved higher solid content and caused the paper drying energy savings more than 10% in the lab test while all the essential printing paper properties kept high quality. Drying energy saving may contribute to greenhouse gas (GHG) reduction and lowering paper production cost.

Keywords
Hybrid calcium carbonate
bulk
smoothness
wet pressing
solid content
drying energy savings
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 : 53
  • No :2
  • Pages :24-31
  • Received Date : 2021-03-20
  • Revised Date : 2021-04-20
  • Accepted Date : 2021-04-22
  • DOI :https://doi.org/10.7584/JKTAPPI.2021.04.53.2.24
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