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 Technology of Thermomechanical Pulp Made from Pinus densiflora (I) - Effect of Temperature and NaOH at Presteaming and Refining -

국내산 소나무로 제조되는 열기계펄프 제조 기술 최적화 연구 (1) - 목재 칩의 전처리와 리파이닝 시 온도와 NaOH 처리의 효과 -

  • Nam, Hyegeong (Dept. of Env. Material Sci., IALS, Gyeonsang National University) ;
  • Kim, Chul-Hwan (Dept. of Env. Material Sci., IALS, Gyeonsang National University) ;
  • Lee, Ji-Young (Dept. of Env. Material Sci., IALS, Gyeonsang National University) ;
  • Park, Hyunghun (Dept. of Env. Material Sci., IALS, Gyeonsang National University) ;
  • Kwon, Sol (Dept. of Env. Material Sci., IALS, Gyeonsang National University) ;
  • Cho, Hu-Seung (Dept. of Env. Material Sci., IALS, Gyeonsang National University) ;
  • Lee, Gyeong-Sun (Dept. of Env. Material Sci., IALS, Gyeonsang National University)
  • 남혜경 (경상대학교 농업생명과학대학 환경재료과학과/임산공학과) ;
  • 김철환 (경상대학교 농업생명과학대학 환경재료과학과/임산공학과) ;
  • 이지영 (경상대학교 농업생명과학대학 환경재료과학과/임산공학과) ;
  • 박형훈 (경상대학교 농업생명과학대학 환경재료과학과/임산공학과) ;
  • 권솔 (경상대학교 농업생명과학대학 환경재료과학과/임산공학과) ;
  • 조후승 (경상대학교 농업생명과학대학 환경재료과학과/임산공학과) ;
  • 이경선 (경상대학교 농업생명과학대학 환경재료과학과/임산공학과)
  • Received : 2015.01.21
  • Accepted : 2015.02.17
  • Published : 2015.02.28
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Abstract

Thermomechanical pulping process uses large amounts of energy, mostly electricity to run electrical facilities. Thermomechanical pulp (TMP) made from Pinus densiflora also has a big drawback that refining consumes 90 per cent of the total energy used in TMP process. This study explored to draw up a way to save refining energy through different thermal treatment at the stages of presteaming and refining. Presteaming temperature was $80^{\circ}C$, $100^{\circ}C$, and $120^{\circ}C$. After presteaming at each temperature, refining was carried out at $100^{\circ}C$, $120^{\circ}C$, and $140^{\circ}C$ respectively. In a presteaming stage, steaming temperature over $120^{\circ}C$ greatly contributed to the decrease of refining energy leading to earlier attainment of a target freeness, irrespective of refining temperature. In addition, NaOH treatment with presteaming enhanced better development of fiber properties during refining than presteaming without NaOH. High temperature refining at $140^{\circ}C$ produced a high strength paper, and wood chips treated by alkali responded better to refining than at over $120^{\circ}C$. Improved softening effect on wood chips led to the decrease in shives contents but it gave no effect on pitch contents of TMP.

Keywords

References

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