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

Hyegeong Nam; Chul-Hwan Kim; Ji-Young Lee; Hyunghun Park; Sol Kwon; Hu-Seung Cho; Gyeong-Sun Lee

doi:10.7584/ktappi.2015.47.1.035

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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

28 February 2015. pp. 35-44

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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℃, 100℃, and 120℃. After presteaming at each temperature, refining was carried out at 100℃, 120℃, and 140℃respectively. In a presteaming stage, steaming temperature over 120℃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℃produced a high strength paper, and wood chips treated by alkali responded better to refining than at over 120℃. Improved softening effect on wood chips led to the decrease in shives contents but it gave no effect on pitch contents of TMP.

Keywords

Thermomechanical pulp

Pinus densiflora

presteaming

refining

shives

pitch

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 : 47
No :1
Pages :35-44
Received Date : 2015-01-21
Revised Date : 2015-02-09
Accepted Date : 2015-02-17
DOI :https://doi.org/10.7584/ktappi.2015.47.1.035

Journal of Korea TAPPI ISSN:0253-3200(Print) 펄프종이기술

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Literature Cited