The Properties of Some Caribbean Pine Pulps, and their Relationship to Wood Specific Gravity Variables

Authors

  • J. Worrall
  • J. Burley
  • E. R. Palmer
  • J. F. Hughes

Keywords:

<i>Pinus caribaea</i>, X-ray densitometry, densitometry, specific gravity, pulp properties, paper properties, percent latewood

Abstract

Twenty Caribbean pine trees were pulped individually, and the properties of these pulps were compared to each other and to those of pulps of five other softwood species. There was substantial tree to tree variation, but overall the properties compared favourably with those of pulps from the commercially better established species. X-ray densitometry of the wood was used to estimate the amount of wood in various specific gravity classes. By using such data it was possible to account for considerably more variation in pulp and paper properties than could be done by using overall specific gravity or percentage latewood. Histograms showing percentage in each specific gravity class differed markedly in shape for trees with the same overall specific gravity.

References

Draper, N. R., and H. Smith. 1966. Applied regression analysis. Wiley, New York. 407 pp.nEkstam, T. 1953. Comparative beating investigation with different laboratory beating apparatus for pulp evaluation. Papper och Tra35:413-428; 475-494.nGladstone, W. T., and G. Ifju. 1975. Nonuniformity in the kraft pulping of loblolly pine. Tappi58:126-129.nGreen, H. V., and J. Worrall. 1964. Wood quality studies. Part I. A scanning microphotometer for automatically measuring and recording certain wood characteristics. Tappi47:419-427.nKeays, J. L., and J. V. Hatton. 1971a. Complete tree utilization studies I. Yield and quality of kraft pulp from the components of Tsuga heterophylla.Tappi54:99-104.nKeays, J. L., and J. V. Hatton. 1971b. Complete tree utilization studies II. Yield and quality of kraft pulp from the components of Picea glauca.Tappi54:1721-1724.nPalmer, E. R., and J. A. Gibbs. 1971. Pulping characteristics of Pinus caribaea from the main growing areas of Fiji. T.P.I. Report L27, London. 60 pp.nPalmer, E. R., and C. B. Tabb. 1973. Pinus caribaea Morelet-its potential as pulpwood. In: J. Burley and D. G. Nikles, eds. Selection and breeding to improve some tropical conifers; Vol. 2:23-44. C.F.I., Oxford.nParker, M. L., and R. W. Kennedy. 1973. The status of radiation densitometry for measurement of wood specific gravity. Proceedings, I.U.F.R.O. Div. 5 meetings, 22 September-12 October, Republic of South Africa. Vol. 2:882-893.nParker, M. L., K. Hunt, W. G. Warren, and R. W. Kennedy. 1976. Effect of thinning and fertilisation on intra-ring characteristics and kraft pulp yield of Douglas-fir. Applied Polymer Symposium No.28:1075-1086.nTamolang, F. N., and F. F. Wangaard. 1961. Relationships between hardwood fiber characteristics and pulp-sheet properties. Tappi44:201-216.n

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Published

2007-06-05

Issue

Number 4 / Winter 1977

Section

Research Contributions

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