Bending strength and modulus of elasticity in bending of beech and black pine plywood

Abstract

The research presented in this paper includes the study of bending properties of plywood made from beech and black pine veneers. For this purpose, four experimental plywood models were made. Two of the models were made from peeled beech veneers and other two models were made from peeled black pine veneers. Water-soluble phenol-formaldehyde resin was used as plywood binder. The bending strength and modulus of elasticity in bending of the experimental plywood were tested in two directions, parallel and perpendicular to the face grain. According to the values of bending strength and modulus of elasticity in bending, plywood models can be used for structural application in construction. Production of plywood with different number of veneers in panel structure, as well as plywood with the same number of the veneers but from different wood specie, gives opportunities for production of panels that can meet different application requirements.