canola residues on the properties of particleboard

Investigation on the influence of the density reduction of the particleboard byThe impact of the addition of different amounts of canola straw to the composition of the hardwood particles for the production of particleboard was investigated. Four levels (0، 15، 30 and 45%) of Canola particles were added to hardwood particles and then particles were blended with 12% urea resin (based on the oven dry weight of the particles). Boards at three densities of 550، 600 and 650 kg/m3 were produced. The flexural and internal bonding strength and water absorption and thickness swelling after 2 and 24 hours immersion in water of the boards were determined using appropriate EN standard test methods. Addition of different amounts of canola particle to the hardwood particles did not change either modulus of rupture or modulus of elasticity of the boards، but the internal bonding of the boards was reduced. As the dosage of the canola particles increased، both water absorption and thickness swelling were reduced. Increasing the density of the boards increased both strength and dimensional stability.