Efeitos da pressão e temperatura na qualidade de chapas de partículas homogêneas de Pinus elliottii Engelm.

Abstract

This work aimed to produce homogeneous layer particleboards with residues of Pinus elliottii wood adhered with polyurethane adhesive to castor oil plant base and to evaluate the effect of the pressure and temperature in the quality of the particleboards produced. For so much, 12 particleboards were manufactured, subdivided in four treatments in function of the pressure (2.0; 3.0; 3.5; and 3.5 MPa) and temperature (90; 90; 50; and 60 ºC). The particleboards were shredded in test samples, and accomplished physical-mechanical tests for determination of density, swelling and absorption of water (ten repetitions for treatment); rupture module and elasticity module in static bending, tension perpendicular to surface or connection Interns and screw withdrawal (21 repetitions for treatment). The particleboards pressed with pressure of 3.0 MPa and temperature of 90 ºC and that with pressure of 3.5 MPa and temperature of 60 ºC presented satisfactory results.