Efeito da inclusão laminar e do tipo de adesivo sobre as propriedades de painéis OSB de Pinus oocarpa

Abstract

The aim of the study was to evaluate the influence of laminate inclusion and the type of adhesive on the physical and mechanical properties of OSB panels produced from the wood of Pinus oocarpa. The experimental design consisted of four treatments. Laminate inclusion and urea-formaldehyde and phenol-formaldehyde adhesives applied in combination with the panel layer were evaluated. For each treatment, three panels with nominal density of 0.65 g.cm-3, 1% to 6% paraffin and adhesive were produced. In the manufacturing of the panels, temperature of 180 ° C, pressure of 3.95 MPa and pressing time of 8 minutes were adopted. From the results it is concluded that: the species Pinus oocarpa has great potential for use in the production of OSB panels; the laminate inclusion resulted in significant improvement in the properties of water absorption and thickness swelling after immersion for two hours, as well as in the modulus of elasticity and modulus of rupture in parallel direction; and the panels made with urea-formaldehyde adhesives in the core and phenol-formaldehyde on the faces statistically equal to panels only with the phenol-formaldehyde adhesive in statistically, except in the internal bonding property.