Painéis laminados e particulados à base de madeiras tropicais da Amazônia

Abstract

Due to a great demand for wood of both by saw wood and panel industries, alternative species have been researched with the aim to supply most used species and to know their technological potential. This worked aimed to study the potential of three tropical species from Amazônia, Cordia goeldiana, Brosimum parinarioides and Parkia gigantocarpa, for their use in plywood and LVL veneer panels and particle production for conventional particleboard and cement wood production with Pinus sp. wood inclusion. Physical and mechanical properties of each product were analyzed. Plywood panels were made with five 2 mm-thick veneers and glued with phenol-formaldehyde resin in two glue spread amounts 280 e 320 g/m² (double line) totalizing twenty two treatments. Faveira panels presented higher values for physical properties and the ones comprised of freijó and amapá had higher mechanical properties. For LVL panel production, nine 2mm-thick veneers were used and they were glued with resorcinic-formaldehyde was used, totalizing 6 treatments. Panels made from Amazonian species presented better quality. Particleboards were produced with the following proportions of Amazonian and Pinus sp. woods: 0, 25, 50, 75 and 100%. The inclusion of Pinus sp. wood in panel composition did not influence physical and mechanical properties of panels, except for internal bonding. Cement-wood panels were also produced in 0, 25, 50, 75 and 100% proportions of Amazonian woods in relation to Pinus sp. woods. Portland CPV ARI PLUS cement was used as binder, totalizing twelve treatments. For freijó wood, the results were not clear. However, inclusion of amapá wood had better result.