Propriedades físicas e mecânicas de painéis compensados e LVL – Laminated Veneer Lumber

Abstract

Inside the timber area the mechanical wood processing basically encompasses two industries, which are sawmills and veneer plants, which are diversified according to the type of product generated. Sawmills produce sawn timber pieces with various sizes to meet the consumer market, as the rolling mills are mainly intended to make the most of the log of wood, making it a continuous or discontinuous blades, which will be employed in the formation of wood composites. These composites or most commonly wood paneling, are mainly intended to supply some usage needs, the original log does not offer. The laminated panels were the first to be developed within the technology area, and the offset its best known representative. Within the group of laminated panels has Laminated Veneer Lumber also panels, better known with the acronym LVL, which are quite similar to plywood. The main difference between them is just as fitting the blades, where the perpendicular offset receives the form of blades and LVL in parallel. Various woods can be used for the production of these compounds, however, this research aimed to verify the feasibility of using wood Amescla (Trattinnickia burserifolia (Mart.) Willd.) For the production of plywood and LVL panels. Panels they were made according to the methodology adopted within the MADEIRANIT Woods LTDA production line, located in the municipality of Sinop-MT, using as adhesive phenol formaldehyde resin. The conducted tests were moisture content (NBR 9484: 2011), bulk density (NBR 9485: 2011), water absorption (NBR 9486: 2011), swelling - Test method (NBR 9535: 2011) , flexural strength (NBR 9533: 2012), quality of bonding (NBR 12466-1: 2012). The design adopted was completely randomized (DIC), with four replicates per panel. It was concluded that for the physical, only the density and thickness swelling statistical difference between the panels. Since the LVL panel showed the lowest density and the highest thickness swelling. For mechanical properties, the bending test, there were differences between the two types of panels, and the highest modulus of rupture and higher elastic modulus were to LVL panel analyzed with blades in a direction parallel to the wood fibers. For assessing the quality of bonding, there were differences between the two types of panels for the shear test, and the LVL was the panel with the highest resistance in the glue line. The LVL panel in the parallel direction, was superior to plywood panel, so depending on the use LVL could replace it. The timber Amescla shown to be promising for manufacturing LVL boards.