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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Studies on Disintegration of Korean Old Corrugated Container(KOCC) Using a Pilot Screen

파일롯 스크린을 활용한 KOCC 해리 효율 연구

  • Lee, Tai Ju (Changgang Institute of Paper Science and Technology, Kangwon National University) ;
  • Nam, Yun Seok (Changgang Institute of Paper Science and Technology, Kangwon National University) ;
  • Sim, Jae Min (Sinppoong Paper) ;
  • Ryu, Jeong Yong (Changgang Institute of Paper Science and Technology, Kangwon National University)
  • 이태주 (강원대학교 창강제지기술연구소) ;
  • 남윤석 (강원대학교 창강제지기술연구소) ;
  • 심재민 (신풍제지) ;
  • 류정용 (강원대학교 창강제지기술연구소)
  • Received : 2016.05.12
  • Accepted : 2016.06.13
  • Published : 2016.06.30
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Abstract

Pulping is a stage that can change fibrous raw materials into pumpable slurry. Recovered paper can be defibrated to individual fibers by shear stress generated by rotation of a rotor and water. Disintegration of recovered paper is more complicated than that of chemical pulp. When disintegration of recovered paper is poor, screening and cleaning efficiency will be worse and properties of paper will also be deteriorated. Therefore, pulping is an important treatment for improvement of availability of recovered paper and process runnability. In this study, degrees of disintegration of KOCC obtained from a linerboard mill was analyzed with a pilot-scale screen. Flake removal of KOCC slurry was performed by a pilot screen. Simple pumping action gave a positive effect on disintegration of KOCC. After pumping for 10 minutes, paper strength increased without the change of water retention value and fibrillation of KOCC slurry. This phenomena can be explained by modification of hornified surface of KOCC fibers by shear stress generated by pumping. Consequently, disintegration efficiency of KOCC can be enhanced by control of retention time at pulper or an agitation power at chests of papermaking process.

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References

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