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Sökning: WFRF:(Hallgren A.) > Mittuniversitetet

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1.
  • Ferritsius, Rita, et al. (författare)
  • Water Absorption and Wet Strength in Hot-pressed Paper
  • 2022
  • Ingår i: Proceedings of the International Mechanical Pulping Conference. ; , s. 168-170
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
    • Effects of hot-pressing on anisotropic sheets with less good formation was here investigated. The main objective was to study water absorption capacity in relation to the wet strength of hot-pressed paper. A pilot paper machine was used to produce papers from TMP and CTMP furnishes. The results indicate that it is not only the high dry content after wetting that contributes to the high wet strength of the paper hot-pressed at 200C. If it is required to have a paper with both low absorption of water and high wet strength, hot-pressing at 200C seems to be more desirable than using con-ventional drying and adding wet chemical agents to the furnish.
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2.
  • Pettersson, Gunilla, et al. (författare)
  • Strong and bulky paperboard plies from low energy CTMP
  • 2014
  • Ingår i: International Mechanical Pulping Conference, IMPC 2014. - 9780000000002
  • Konferensbidrag (refereegranskat)abstract
    • A description is given regarding methods used to manufacture strong and bulky sheets from furnishes based on a broad range of surface modified CTMP qualities. Starch and CMC are adsorbed on the fibre surfaces using a multilayer or a MIX concept. It is shown that both the in-plane and out-of-plane strength for the CTMP based sheets after such surface treatment can be more than doubled at a maintained density. This can be utilized to improve bending stiffness or to reduce the basis weight in multi-ply paperboards.
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