ANATOMIC AND CHEMICAL CHARACTERISTICS OF Eucalyptus CLONES WOOD AND ITS INFLUENCE UPON BONDING

Wood is a heterogeneous and complex material made up from different elements distributed along the trunk in several proportions. Associated with hygroscopicity, they have an influence on wood processing, including bonding. Therefore the present study sought, not only through the anatomic characterization and measurement but also through the total extractive content in Eucalyptus clones wood, to find out the correlation between the quality and the bonding junctions. Pearson correlations were used, considering 39 and 26 clones in interaction with the urea- formaldehyde sticker. The anatomic characteristics, relative to frequency and size of conducting vessels, radial parenchyma and its total extractive content presented correlation with the evaluation of clone’s bonding quality as well as with the percentage of wood failure and glue-line shear.