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Pulping characteristics of Pinus patula grown in Zimbabwe (ODNRI Bulletin No. 8)

Pulping characteristics of Pinus patula grown in Zimbabwe (ODNRI Bulletin No. 8)

Palmer, E.R. and Ganguli, S. (1988) Pulping characteristics of Pinus patula grown in Zimbabwe (ODNRI Bulletin No. 8). [Working Paper]

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Abstract

Twenty trees of Pinus patula, growing on five sites in Zimbabwe as part of a progeny test, were examined and their pulping characteristics determined. The trees were from the same full-sib family and were 12 years old. No relationship between site, and wood density and fibre dimensions could be inferred because the differences between trees within a site were found to be greater than the differences between sites. All of the trees were pulped by the sulphate process: when constant digestion conditions with 18% active alkali were used, the yield of pulp from individual trees was from 41.3 to 44.9%. All of the pulps had a good tensile strength, but few had tearing strength sufficient for wrapping paper. Trees suitable for the production of pulps with high tearing strength were most likely to grow on the Grasslands site. For the twenty trees, there was a poor correlation between the rate of growth of a tree and the tearing strength of pulp produced from it; but within any one site the slowest growing tree was most likely to yield the pulp with the highest tearing strength.

Item Type: Working Paper
Additional Information: [1] ISBN: 0 85954 234-3.
Uncontrolled Keywords: pulping characteristics, pinus patula, zimbabwe, papermaking, handicrafts
Subjects: S Agriculture > SB Plant culture
Faculty / Department / Research Group: Faculty of Engineering & Science > Natural Resources Institute
Faculty of Engineering & Science > Natural Resources Institute > Food & Markets Department
Related URLs:
Last Modified: 05 Mar 2014 16:42
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
URI: http://gala.gre.ac.uk/id/eprint/11050

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