ResumoO presente estudo teve como objetivo determinar a viabilidade técnica da produção de painéis aglomerados de misturas de fibras e maravalhas de Pinus spp por meio das propriedades físicas e mecânicas. A matéria-prima utilizada para a produção dos painéis foi composta por fibras retiradas do processo produtivo de MDF, maravalha coletada no processo de aplainamento da madeira, resina uréia-formaldeído e emulsão de parafina. O delineamento experimental envolveu cinco tratamentos homogêneos nas proporções de: 100 partes de fibras para 0 partes de maravalha (T1), 75:25 (T2), 50:50 (T3), 25:75 (T4) e 0:100 (T5). Foram produzidos três painéis por tratamento com 650 kg.m -3 de massa específica, 12% de resina, 1% de emulsão de parafina e ciclo de prensagem de 40 kg.cm -2 de pressão, 160 o C de temperatura por um tempo de 8 minutos. A determinação da massa específica, absorção de água, inchamento em espessura e tração perpendicular foram realizados de acordo com os procedimentos da ASTM (2006)
AbstractThis study aimed to determine the technical feasibility of the production of particleboard from fibers and wood shaving of Pinus spp through physical and mechanical properties. The raw material used for producing panels was composed of fibers taken of the MDF process, wood shaving collected in the flattening process, urea formaldehyde resin and paraffin emulsion. The experiment involved 5 treatment homogeneous in the proportions: 100 parts of fibers to 0 parts of wood shavings (T1), 75:25 (T2), 50:50 (T3), 25:75 (T4) and 0: 100 (T5). 3 panels were produced by treatment with 650 kg.m -3 density, 12% resin, 1% paraffin emulsion and pressure of 140 kg.cm -2 , temperature of 160oC for 8 minutes. The determination of specific gravity, water absorption, and thickness swelling, tension perpendicular to surface were performed according to the procedures of ASTM (2006); the static bending test followed the procedures of DIN (1982) and screw withdrawal resistance the indications of ABNT (2013). With the verification of data normality and homogeneity of variance an analysis of variance was carried out and the Scott-Knott test at 95% probability. The results showed that the average values of dimensional stability of the panels were regular in relation to the reference standards. However, the increased amount of wood shaving in the panels caused a decrease in the mechanical properties, especially the modulus of elasticity in the static bending and in internal adhesion.