Efeito dos tipos de adesivos e das composições de camadas nas propriedades de painéis OSB

Abstract

The objective of the present study was to produce and characterize OSB panels with different adhesives and also with different oriented layer compositions, in order to verify their influence on physical and mechanical properties. Initially, a particle advisor was developed for laboratory use. Following, two experiments were planned, experiment 1 to evaluate the influence of phenol-formaldehyde and tannin-formaldehyde adhesives, used pure and in a mixture of 50% each, and experiment 2 to evaluate the influence of different layer compositions on the physical-mechanical properties of the panels. The panels were made with Pinus taeda wood particles, nominal density of 0.65 g / cm³ and three layers. The tests were performed according to ASTM D1037 / 06 for Experiment 1 and EN 300 (2006) for Experiment 2. The results demonstrated were using a phenolic and tannin filter mixture of the same type for the use of a tannin adhesive mixture. Composition 20 / 60S / 20 presented the results for dimensional stability. As for the composition factor of the layers, the ratio 30/4030 provided flexible properties in parallel relation, a ratio 10/80/10, a perpendicular orientation. Also, what is produced for this factor indicates that the 20-60-20 ratio is better than the static bending properties in different directions