Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference (한국펄프종이공학회:학술대회논문집)

Korea Technical Association of the Pulp and Paper Industry (한국펄프종이공학회)
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Strength property improvement of OCC-based paper by chemical and mechanical treatments (3 - handsheet physical properties)

골판지 고지의 물리화학적 처리에 의한 강도향상 (제3보 - 수초지의 물리적특성변화)

  • Lee, Jong-Hoon (Dept. of Forest Product, College of Agriculture, Chungnam National University) ;
  • Seo, Yung B. (Dept. of Forest Product, College of Agriculture, Chungnam National University) ;
  • Jeon, Yang (Dept. of Forest Product, College of Agriculture, Chungnam National University) ;
  • Lee, Hak-Lae (Dept. of Forest Product, College of Agriculture and Life Science, Seoul National University) ;
  • Shin, Jong-Ho (Pulp and Paper Research Center, KRICT)
  • 이종훈 (충남대학교 농과대학 임산공학과) ;
  • 서영범 (충남대학교 농과대학 임산공학과) ;
  • 전양 (충남대학교 농과대학 임산공학과) ;
  • 이학래 (서울대학교 농업생명과학대학 임산공학과) ;
  • 신종호 (한국화학연구소 펄프제지 연구센타)
  • Published : 2000.04.01
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Abstract

This study is a continuation of the previous experimental analysis and is mostly focused on handsheet strength properties. Four completely different fibers, which were Hw-BKP, Sw-BKP, white ledger, and OCC, were selected to investigate the effect of mechanical pre-treatment by Hobart mixer on handsheet strength properties. After equal time mechanical pre-treatment, the fibers were refined with laboratory valley beater for 10, 20 and 30 minutes, and handsheets were prepared from the fibers for physical strength comparison. Handsheets from SW-BKP and OCC showed 5-30% increase of breaking length, burst index, tear index, and compression index while handsheets from HW-BKP and white ledger no Increase except tear index. In Hobart mixer pre-treatment, HW-BKP and white ledger fibers were easily attached to the wall of the mixer bowl and mechanical action was not effectively applied. The fiber length of Hw-BKP and white ledger were 0.837mm and 1.591 mm, respectively, while SW-BKP and OCC were 2.744 mn and 2.033 mm, respectively, in weight weighted length. The effective mechanical pre-treatment seems to be related to the fiber length. Tear indexes of the pre-treated furnish were much higher than no pre-treatment at the same breaking length level.

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