Resumo

TRIANOSKI, Rosilani; IWAKIRI, Setsuo  e  MATOS, Jorge Luis. Evaluation of particleboard of Toona ciliata produced with different densities and resin levels. Madera bosques [online]. 2014, vol.20, n.3, pp.49-58. ISSN 2448-7597.

This study aimed to evaluate the physical and mechanical properties of particleboard produced of Toona ciliata with different densities and resin levels. Trees from an experimental plantation located in Corupá-SC were used. The trees were cut into logs collected and samples of all longitudinal positions were used to determine the properties of the wood and the generation of particles. Evaluation of wood properties consisted in determining the wood density and chemical properties, which followed the procedures of COPANT standards and TAPPI, respectively. The panels were produced according to a randomized design, using nominal density of 0,60 g/cm³, 0,70 g/cm³ and 0,80 g/cm³, and 6% and 8% resin and pressed at a temperature of 160° C, at an specific pressure of 4 MPa and in atime of 8 minutes. The physical and mechanical properties were evaluated according to the methodology proposed by the European Standard and the Brazilian Standard, the tests made being apparent density (CEN, 2002d), water absorption and thickness swelling (CEN, 2002b), static bending (CEN, 2002a), perpendicular traction (tension) (CEN, 2002c) and screw pullout resistance (ABNT, 2006b). The results indicated that all treatments coplied with the minimum requirements established by the reference standards. The panels produced with fewer raw materials (density of 0,60 g/cm³ and 6% resin), in addition to meeting the regulatory requirement, indicated a savings of up to 23,73% on the amount of particles and up to 42,80% on the amounts of resin and catalyst, when compared with other treatments.

Palavras-chave : Autralian cedar; densification; species alternatives; reduction of the raw material; urea-formaldehyde.