Chapter 4
I Management Of Native Forests
II Plantations-high Productivity Resources
III Protecting The Resource
IV Harvesting The Resource
V Solid Wood And Its Processing
VI Minor Forest Products
VII Reconstituted Wood Products
VIII Pulp And Paper
i Early eucalypt pulping research and development
ii Eucalypt pulp production begins
iii Early commercial operation
iv The beginnings of pulp production from plantation pine
v Technological development and economic growth
vi 1975 and beyond
IX Export Woodchips
X Future Directions
XI Acknowledgements
References
Index
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Early commercial operation (continued)
APPM found that it could meet its refining needs by adapting conical refiners for the purpose in place of the conventional 'hollanders' and supplying the mixed eucalypt-softwood pulp to them at an increased consistency. APM tried using hollanders of special design but soon found that the most satisfactory units for its eucalypt kraft pulp refining needs were disc refiners,[88] a new technology originating in North America in the 1930s and since developed to become the most commonly used refining method for all types of wood pulp world-wide. It also found that to meet strength needs with minimum usage of imported long fibre pulp it was necessary to refine the eucalypt and the softwood components separately.All three companies experienced problems with the running of high eucalypt content papers on the paper machine because of the lower strength of the wet sheet compared with that from long fibre pulp. These, however, were progressively overcome by adjustments to furnish, refining conditions and later to improved machine design. Sticking of the wet sheet at the press roll was a severe problem for APM at its Maryvale mill in its early years until overcome by the continuous application of a very small quantity of a sequestering agent.[89]
Organisations in Australian Science at Work - Australian Paper Manufacturers Ltd (A.P.M.); Australian Pulp and Paper Mills (A.P.P.M.)
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Australian Academy of Technological Sciences and Engineering |  |
© 1988 Print Edition page 237, Online Edition 2000
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