DefinePK

Abstract

ABSTRACT Particleboards were made with target density of 0.70 g/cm3 from different age trees of Eucalyptus camaldulensis using flakes from 4 years (Class A), 6 years (Class B) and 8 years (Class C) old trees and their mixtures; 50 percent A/50 percent B, 50 percent B/ 50 percent C and 50 percent A / 50 percent C, bonded with urea formaldehyde resin. Static bending, internal bond, screw withdrawal, thickness swelling, water absorption and linear expansion of particleboards for each age class and their mixtures were determined. Boards easily met industry specifications for all properties except linear expansion. Overall, the properties of the panels produced from 100 percent class A flakes were significantly superior to those of 100 percent class C. the properties of the panels produced from class B and C flakes were improved when they were mixed with 50 percent class A flakes.