Abstract

In this study, the effects of layer arrangements on bending properties of laminated wood products have been investigated. Poplar (Populus nigra L.) and polyvinyl acetate (PVA) were used as wood and adhesive, respectively. Bending static properties (MOE and MOR) of laminated products comprising various combinations of layer arrangements resulting in 5 combinations were measured. The results of this study showed that sawn lumber (control sample) had better bending properties (MOE and MOR) than lumber made from laminated layers. On the whole, using layers as constitution for layered systems decreased MOR more than MOE. Using thick layers reduced the MOR and MOE of the products. Finally, the proper layer arrangements should be selected with respect to their final application in the production of laminated products.

Key words: Laminated wood products, bending properties, layer arrangement, poplar wood.