Painéis compensados sarrafeados produzidos com Pinus oocarpa, Castilla ulei e Acrocarpus fraxinifolius

Abstract

The objective of this work was to study the physical and mechanical properties of plywood panels produced from wood residues of Pinus oocarpa, Castilla ulei and Acrocarpus fraxinifolius. These species constituted the core of the panels, while the layers were produced with slides of Pinus oocarpa. The following properties of the woods were analyzed: basic and apparent densities, retractability, moisture and mechanical characterization. The PVA adhesive was used in the bonding of slats and slides. The weight of 160g/m² was used between slats and 320g/m² in the bonding of the slides. The panels were produced with dimensions of 300x300x28mm. The following properties were evaluated: moisture; apparently density; water absorption; shear in the glue line and the modulus of elasticity and rupture in the static bending test. The results for the physical properties of the woods showed that there was no significant difference between the species. As for the properties evaluated for the composite panels, the Pinus oocarpa wood present in the cover and core gave the highest average value for modulus of rupture and modulus of elasticity, parallel and perpendicular.