Avaliação das propriedades físico-mecânicas de painéis compensados de Toona ciliata M. Roem. var. australis

Abstract

The aim of this work was to evaluate the physical and mechanical properties of plywood panels produced with Toona ciliata wood using two different pressure levels and two spread rates; besides the effect of Pinus sp. veneer inclusion on the quality of the panels. The phenol formaldehyde resin was used to produce plywood of fi ve veneers. The physical-mechanical tests were conducted according to ABNT 31:000.05-001/2:2001 standard. The results of apparent density, water absorption after 24 hours, static bending (MOR and MOE) and glue line dry shear strength presented signifi cant statistical differences between the treatments. All the treatments presented parallel MOE and MOR value above the one established by the NBR 31.000.001/2:2001 standard; however just the panels with inclusion of Pinus sp. in the inner presented perpendicular MOE and MOR above the one established by the same. For the glue line shear strength tests, the panels presented values above the minimum established by EN 314-2 (1993) standard.It was not observed infl uence of the spread rate and pressure on the physical and mechanical properties between the panels produced only with Toona ciliata. The inclusion of Pinus sp. veneers both in the face and inner of the panels contributed to improve most of the physical and mechanical properties.