Several wood species from the Amazon region are used in the manufacture of furniture, which leaves behind large amounts of waste (slabs, sawdust, sanding dust and bark), thus causing serious environmental impacts. An interesting alternative for the use of these wastes is the manufacture of particleboards. However, few studies have focused on the behavior of Amazonian tree species and the wastes resulting from production with this type of material. This paper discusses the potential use of Tauari (Couratari oblongifolia) wood waste as a raw material for the production of particleboards, using castor oil-based bi-component polyurethane adhesive. Experimental boards were prepared with dry wood particles and a castor-oil polyurethane adhesive content of 16%. The boards, whose nominal density was 1000 kg⋅m , with higher IB and TS than those specified by the NBR 14810-2 and ANSI A208.1 standards, enabling this product to be classified as high-density particleboard suitable for industrial and commercial use.
Neste trabalho foi estudada a fabricação de painéis de partículas (particleboard) de madeira tauari (Couratari oblongifolia) como forma de melhorar o aproveitamento da madeira oriunda do manejo extrativo da região amazônica, visando diminuir o impacto ambiental provocado pela retirada destas árvores. Os resíduos foram aglomerados com resina poliuretana de mamona, tipo bi componente. Os compósitos foram conformados com densidade nominal de 1000 kgm-3 por prensagem uniaxial a uma pressão de 5 MPa, a 90, 110 e 130°C. Para a caracterização dos painéis foram realizados os ensaios de Densidade aparente (DAP), Teor de Umidade (U), Absorção de água (AA), Inchamento na espessura (IE), Flexão Estática (MOR e MOE), Tração perpendicular (TPP) e Arrancamento de parafuso (AP), segundo as recomendações da norma NBR 14810-3 da ABNT (2006b). Os resultados mostraram que os painéis fabricados com o resíduo da madeira tauari independentemente da temperatura de conformação apresentam densidade média entre 930 e 941 kgm-3, com valores de tração perpendicular (ligação interna), inchamento na espessura superiores aos estabelecidos pelas normas NBR 14810-2 (ABNT, 2006a) e ANSI A208.1 (1999) sendo classificados de acordo como material de alta densidade recomendado para uso industrial e comercial.
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