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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Optimization of Repulping Process of Unsorted ONP for Pulp Mold (I) - Laboratory high consistency pulper -

펄프몰드 제조를 위한 미분류 신문폐지의 펄핑 공정 최적화 (제1보) - 실험용 고농도 펄퍼 이용 -

  • Ryu, Jeong-Yong (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology(KRICT)) ;
  • Cho, Byoung-Uk (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology(KRICT)) ;
  • Kim, Tae-Keun (Pung Nyun Ind. Co.) ;
  • Park, Dae-Sik (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology(KRICT)) ;
  • Shin, Eun-Ju (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology(KRICT)) ;
  • Song, Bong-Keun (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology(KRICT))
  • 류정용 (한국화학연구원, 바이오정밀화학연구센터) ;
  • 조병욱 (한국화학연구원, 바이오정밀화학연구센터) ;
  • 김태근 (풍년기업사) ;
  • 박대식 (한국화학연구원, 바이오정밀화학연구센터) ;
  • 신은주 (한국화학연구원, 바이오정밀화학연구센터) ;
  • 송봉근 (한국화학연구원, 바이오정밀화학연구센터)
  • Published : 2007.12.31
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Abstract

In order to utilize unsorted ONP, which contains leaflets (printed coated papers), to produce pulp mold, optimum conditions for a repulping process were investigated with a laboratory high consistency pulper. It was concluded that medium or high consistency pulping is necessary to accelerate the rate of deflaking of unsorted ONP. Considering flake content, fines content and pulping energy, the optimum conditions for the laboratory Helico pulper were 11% of repulping concentration and 3 min of repulping time. The repulping temperature shall be at least $30^{\circ}C$. Aging of paper slows down the rate of de flaking but in an actual pulp molding process its effect could be negligible.

Keywords

References

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