A procedure for measuring the flexibility of single wood-pulp fibres |
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Authors: | M Tchepel J W Provan A Nishida C Biggs |
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Institution: | (1) Pulp and Paper Research Institute of Canada (PAPRICAN), 3800 Wesbrook Mall, Vancouver, BC, Canada, V6S 2L9;(2) University of Victoria, Victoria, BC, Canada;(3) Department of Mechanical Engineering, University of Victoria, Victoria, BC, Canada |
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Abstract: | A way of determining the flexibility of wood-pulp fibres is developed, which involves i) a precise measurement of the topology
of single-fibres by using a confocal laser scanning microscope and ii) the measurement of the elastic modulus of the fibres
by using a single-fibre fatigue cell. Reported in this paper are the initial results of tests carried out on black spruce
fibres, which have been subjected to three different levels of mechanical refining energy, namely ∼1100, 2300, and 3500 kWh/t.
It is found that the fibre flexibility rises significantly between the first and second energy levels, but it does not change
to the same degree between the second and third ones. The described procedure of measuring the flexibility of fibres may be
used to establish the appropriate refiner energy necessary for the production of a specific grade of paper.
Russian translation published in Mekhanika Kompozitnykh Materialov, Vol. 42, No. 1, pp. 115–128, January–February, 2006. |
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Keywords: | refining specific energy (SE) single wood fibres thermomechanical pulp (TMP) softwood S2 layer confocal laser scanning microscope fibril angle single fibre fatigue cell axial fatigue second moment of area modulus of elasticity fibre flexibility fibre properties |
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