Specialty Timbers New ZealandRotary peeling of 15 year old E. bosistoana and E. quadrangulata
By Clemens Altaner, Fei Guo, Paul Millen, June 2019.
Download SWP-T079 (pdf)
Executive summary
It was demonstrated that rotary peeled veneers of good surface quality can be obtained from 15 year old Eucalyptus bosistoana and E. quadrangulata trees grown in New Zealand. The mechanical properties of the E. bosistoana veneers (average dynamic MoE 16.6 GPa) and their radial profiles were comparable to the best species (E. cloeziana or Corymbia citriodora) investigated in Australia from a similar aged resource and outperforming radiata pine.
Growth-stresses can cause heart checking and veneer splitting. These were pronounced in veneer from one of the E. quadrangulata logs. The E. bosistoana veneers did not suffer from veneer splitting.
Because of the limited samples size (3 E. bosistoana and 2 E. quadrangulata trees) these results are only an indication of the potential of the species. As NZDFI plantations mature, more trees will become available to verify the findings and further consider genetic and environmental effects on the key traits.
The veneers are now available for further research, for example gluing trials.
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