Fibre properties as control variables in papermaking? Part 2 Strengthening interfiber bonds and reducing grammage

Elias Retulainen, Kaarina Nieminen

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Abstract

In this paper the potential of improving paper qualities by controlling fibre properties is studied. Seven fibre properties are chosen as the basic variables describing the functioning of fibres in a network: fibre strength, fibre length, fibre width, fibre coarseness, relative bonded area, specific bond strength and light absorption coefficient. Their potential and limitations are viewed on the basis of simple theoretical models. Modified Shallhorn-Karnis models are used to describe the effects of fibre properties on tensile and tear strength (fracture toughness) of paper. Theoretical considerations demonstrate the strong dependence of light scattering coefficient of paper on fibre coarseness, the amount of lumen bonding and interfibre bonding. Both the optical and strength properties of paper are strongly dependent on fibre coarseness and the relative bonded area and strength of bonds. Forming stronger fibre bonds is one way of simultaneously improving tensile strength and optical properties of paper.
Original languageEnglish
Pages (from-to)305-311
Number of pages7
JournalPaperi ja puu
Issue number5
Publication statusPublished - 1996
MoE publication typeA1 Journal article-refereed

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Keywords

  • paperi
  • ominaisuudet
  • paperinvalmistus
  • kuidut
  • kuitupuu

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