Study on the possibility of particle board tree-layer manufacturing using chick-pea(Cicer arietinum) stem

In this study, the possibility of using chick-pea straw residues for manufacturing three-layer particleboards was studied. The amounts of chick-pea straw in mixture with industrial particles were (% 25:75),(% 40:60),(% 55:45) respectively. Urea formaldehyde (100%) and Melamin urea formaldehyde at different ratios of MF / UF were used as binders. The resin were applied at two levels of (% 8,10) in core and two levels of (% 10,12) in surface layers, based on oven dried weight of particles. Mechanical and physical properties of boards (Modulus of rupture, Modulus of elasticity, internal bonding and thickness swelling and water absorption after 2, 24 hours soaking in water) were measured and data were analyzed, statistically. The results indicated that increase of chick-pea straw lead to incnement of bending strength and modulus of elasticity. Also the increase of resin content and use of melamin urea formaldehyde resin caused to improve mechanical and physical properties. In general, the use of chick-pea straw in mixture with industrial particles up to 55%, and resin content of (10,12%) in core and surface layers, resulted in producing boards with appropriate mechanical properties which are suitable for interior uses.