Qualidade de painéis OSB (Oriented Strand Board) produzidos com a madeira de clones de Eucalyptus urophylla

Abstract

The objective of this work was to evaluate the physical and mechanical properties of OSB (Oriented Strand Board) produced from six different clones Eucalyptus urophylla clones Particles “Strands” were used in the proportion of 90% of the relative dry mass of the panel, glued with 9% phenol-formaldehyde adhesive and 1% paraffin emulsion. The OSB panels were pressed for 10 minutes at 150°C temperature, 3.92 MPa pressure and 0.70 g / cm³ nominal density. After that, the panels had their physical and mechanical properties evaluated. The panels produced with clones 26 and 62 obtained the highest water absorption after two hours of immersion. When evaluated in 24 hours of immersion in water, there was no difference between water absorption values. For thickness swelling property, for 2 and 24 hours of immersion in water, the highest values were observed for the OSB panels produced from the clones 62 and 28, respectively. All OSB panels showed statistically equal values for all mechanical properties, excepting for clone 19, which had higher values than the other for MOE and MOR in the parallel direction. In general, there was a low clone effect on the properties of the OSB panels.