Effect of White Water Quality on AKD Sizing of Linerboard

백수의 수질에 따른 라이너지의 AKD 사이징

  • Lee, Hak-Lae (Dept. of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University) ;
  • Seo, Man-Seok (Dept. of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University) ;
  • Shin, Jong-Ho (Taekwang Chemical Co.) ;
  • Youn, Hye-Jung (Dept. of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University)
  • 이학래 (서울대학교 농업생명과학대학 산림과학부) ;
  • 서만석 (서울대학교 농업생명과학대학 산림과학부) ;
  • 신종호 (태광화학공업주식회사) ;
  • 윤혜정 (서울대학교 농업생명과학대학 산림과학부)
  • Published : 2006.06.30

Abstract

Neutral sizing is required for linerboard to solve the troubles in strength and process caused by recycled raw materials. AKD sizing efficiency can be influenced by process condition like white water quality, fines retention and so on. Therefore, this study was aimed to evaluate sizing performance of general and fast cure type AKDs using process water obtained from linerboard mill. To evaluate effect of process water quality on AKD sizing, white water was diluted with tap water at the different dilution ratios and UKP slurry was sized using the prepared water. Also, effects of inorganic and organic ion material on sizing were examined. When white water was used for stock forming, UKP sheet showed very low sizing degree. Sizing degree of sheet was increased with increase of dilution ratio because water quality was improved. Especially anionic organic material had a greater influence on AKD sizing than inorganic material. When white water quality was deteriorated, fast cure type AKD showed superior sizing performance to general type AKD.

References

  1. Yeo, S.-K., Ryu, J.-Y., Shin, J.-H., Song, B.-K., and Ow, S.-K., Recycling of wastepaper (VIII) - Contamination of process water by system closure, J. of Korea TAPPI, 31(4):1-7 (1999)
  2. Lee, H.L., Ham, C.H., Lee, J.Y., and Lee, S.G., Effect of the contamination of white water obtained from paper mill on paper strength, J. of Korea TAPPI, 36(4):16-24 (2004)
  3. Lee, H.L., Seo, M.S., Shin, J.H., and Youn, H.J., Neutral sizing of linerboard using fast cure type AKD, J. of Korea TAPPI, 38(1):1-8 (2006)
  4. Lindstrom, T. and Soderberg, G., On the mechanism of sizing with alkyl ketene dimers, Parts 3-4, Nordic Pulp and Paper Research Journal (2):31-45 (1986)
  5. Neimo, L., Internal sizing of paper, in Papermaking Chemistry, Papermaking Science and Technology, Vol. 4, pp.190-192, Fapet Oy, Helsinki (1999)