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1999
Conference Paper
Titel
Poplar and eucalyptus wood as raw material for wood-based panels
Abstract
The wood working industry, particularly the particle and fibre board industry offers good chances for the use of hardwood from short rotation wood plantations. Due to its low density, poplar wood can be used for the production of high strength boards at low density level. Experimental results are reported concerning the use of poplar wood in particleboard production. The poplar clone, site, age of the tree, and the cork contents as well as the binder were varied. The results indicate that there are no significant differences in the bonding strength between different clones. Using urea formaldehyde resin, boards with acceptable quality can be manufactured form 5-year old balsam poplar trees containing 26 % of bark. The use of a high amount of bark is deleterious to the physical-mechnical properties of the boards. Nevertheless, bark decreases the formaldehyde release of the boards. Debarked poplar chips are easily bondable with conventional binders. Furthermore, strand boards were made from poplar wood. Results of the investigations regarding the use of poplar short and midi rotation wood in medium density fibreboards (MDF) show that the properties of MDF depend on the age of the wood and on the disintegration conditions. Moreover, results of preliminary investigations on the use Eucalyptus wood in MDF production are presented. The strength properties of MDF from poplar wood are somewhat higher and the thickness swelling lower in comparison to MDF from Eucalyptus wood.
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