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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Improvement of Pulp Handsheet Strength Properties by Polylactic Acids

  • Hou, Q.X. (Tianjin Key Lab. of Pulp & Paper, Tinanjin University of Science & Technology) ;
  • Chai, X.S. (Institute of Paper Science and Technology, Georgia Institute of Technology) ;
  • Yang, R. (Institute of Paper Science and Technology, Georgia Institute of Technology) ;
  • Ragauskas, A.J. (Institute of Paper Science and Technology, Georgia Institute of Technology)
  • Published : 2006.06.06
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Abstract

Polylactic acids polymer (PLA) was applied as an additive to improve the strength properties of handsheets prepared from three unbleached southern pine kraft pulps with different kappa number and an aspen bleached chemithermomechanical pulp (BCTMP). The results showed that PLA could greatly improve the tensile and burst strength of the pulp handsheets. Heat pressing effect was also important to enhance the strength properties. For unbleached kraft pulps, it was found that an appropriate amount of residual lignin in pulps had a positive effect on the handsheets strength improvement when adding PLA. The thickness of the handsheet did not change the PLA strengthening effect. In general, PLA effect on tear strength improvement could be neglected. However, it had a significant effect on the improvement of tear strength for the aspen BCTMP handsheets not containing sufficient amount of fines.

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