Efeito do tratamento térmico em painéis MDF

Abstract

Wood panels of the type MDF (Medium Density Fiberboard) are plates of medium density fibers, bonded by means of resin with heat and pressure action. Has been employed in various fields such as in furniture manufacturing, construction and packaging industry. This study aims to evaluate the effect of heat treatment on MDF panels, aiming at the improvement of dimensional stability. Were obtained from the local shops MDF panels, manufactured with raw material Eucalyptus sp. and synthetic resin urea formaldehyde. Study evaluated the effect of heat treatment using the temperatures of 160 and 180 ° C by using, with each of these applied for 6 and 12 minutes. Additionally, the performance of control samples was evaluated, ie which have not undergone any treatment. After treatment, samples were produced for physical testing (colorimetry, bulk density, water absorption, thickness swelling, residual and hygroscopic) and mechanical (static bending and screw withdrawal). The results of the physical properties showed that the treatments did not increase the dimensional stability. The mechanical properties were not affected by the heat treatment. The color of the panels has changed moderately.