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With the growing concern about the emission of formaldehyde in indoor environments in view of its health hazard, the present work aims to evaluate the use of bark of Pinus caribaea var. caribaea to attenuate the emission of formaldehyde in composites agglomerates pressed at different temperatures and bark proportions. The composites were produced at two pressing temperatures (140 °C and 160 °C), five bark particle proportions (0, 5, 10, 15 and 20%), pressing time of 7 minutes, nominal density of 0.70 g.cm-1, specific pressure of 3.92 MPa, dimensions of 40x40x1.27 cm and 10% of ureaformaldehyde adhesive. The raw material was characterized considering the basic and apparent density and the agglomerates composites characterized according to their physical properties (density, humidity, swelling in thickness and water absorption after 2 and 24 hours of immersion), mechanical properties (internal bonding, modulus of rupture MOR and modulus of elasticity MOE to static bending) and chemical (pH, buffer capacity and formaldehyde concentration). The results showed the feasibility of producing composites with Pinus caribaea var. caribaea as well as to obtain a reduction in the emission of formaldehyde due to the increase in the proportion of bark.

Avaliação da emissão de formaldeído em compósitos fabricados com adição de cascas de Pinus caribaea var. caribaea