Fiber properties as control variables in papermaking? Part 1. Fiber properties of key importance in the network

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Abstract

This paper discusses the potential for improving paper characteristics by controlling fibre properties. Seven fibre properties were chosen as the basic variables describing the functioning of fibres in a network: fibre strength, fibre length, fibre width (perimeter), fibre coarseness, relative bonded area, specific bond strength and light absorption coefficient. Their potential and limitations are reviewed 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 extent of lumen bonding and interfibre bonding. Both the optical and strength properties of paper are strongly dependent on fibre coarseness and on relative bonded area and bond strength. Forming stronger fibre bonds is one way of improving simultaneously the tensile strength and optical properties of paper.
Original languageEnglish
Pages (from-to)187-194
Number of pages8
JournalPaperi ja puu
Volume78
Issue number4
Publication statusPublished - 1996
MoE publication typeNot Eligible

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