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Determining fibre coarseness of small wood samples from Acacia mearnsii and Eucalyptus grandis by Kajaani FS 200 fibre analyser

1997; Volume: 50; Issue: 5 Linguagem: Inglês

1038-6807

A. Muneri, V. Balodis,

Material Properties and Processing

Within-tree variation of fibre coarseness was studied in an eight year old, plantation grown tree of each of Acacia mearnsii De Wild and Encalyptus grandis Hill ex Maiden. The trees were sampled at six height levels. A radial strip was prepared from each sample disc and pulped clamped between perforated plates. Fibre coarseness was measured with a Kajaani FS 200 fibre analyser. Oven dry mass of fibres in the dilute suspensions was determined using Millipore filters. A. mearnsii had finer fibres than E. grandis (4.2 compared with 6.2 mg/100m). Fibre coarseness increased with height in A. mearnsii but decreased with height in E. grandis. With distance from pith, coarseness increased in E. grandis, and was constant for A. mearnsii.