On-line version ISSN 1806-9088
NAUMANN, Rafael Baptista et al. Properties of foils manufactured with particles of wood of Eucalyptus urophylla S. T. Blake and of Schizolobium amazonicum Herb.. Rev. Árvore [online]. 2008, vol.32, n.6, pp.1143-1150. ISSN 1806-9088. http://dx.doi.org/10.1590/S0100-67622008000600020.
This work aimed to evaluate the properties of particleboards produced with Eucalyptus urophylla (density 0.55 g/cm3) and Schizolobium amazonicum (density 0.30 g/cm3).Five wood proportions and two types of particle (shavings and chips) were used to manufacture the boards. Board dimension was 60 cm x 60 cm x 1 cm and average density 0.60g/cm3. Eight percent of urea-formaldehyde adhesive was used. Boards were pressed at 170 ºC and 32 kgf/cm2 of pressure in 8 minute cycles. Board properties were determined according to NBR 14810-3 standard. There was no influence of the variables on board density and linear expansion. Generally,increasing the percentage of paricá increased the values of some properties such as MOE, MOR, screw holding, water absorption after 24 hours and internal bond, probably due to increased compaction rate. The type of particle used affected only the internal bond and thickness swelling of the boards. The boards produced with wood chip-originated particles (smaller slenderness ratio) presented higher internal bond. However, thickness swelling was higher.
Keywords : Particleboards; Eucalyptus urophylla; Schyzolobium amazonicum.