Some technological properties of plywood panels manufactured from alder (Alnus glutinosa subsp. barbata (C.A. Mey.) Yalt.) species grown in different regions

In this study, it was researched that the effect of region difference and adhesive type on some mechanical and physical properties of alder wood and plywood panels manufactured from alder. For this reason, alder logs taken from Artvin (Arhavi), Trabzon (Akçaabat) and Giresun (Espiye) regions were used as tree species.Some mechanical properties such as shear strength, bending strength, modulus of elasticity of the plywood panels were conducted according to TS EN 314-1, TS EN 310, respectively. Physical properties such as density and equilibrium moisture content were determined according to TS EN 323 and TS EN 322, respectively. pH values was determined according to TAPPI t m-45. Formaldehyde emission of plywood panels was determined according to EN 717-3. Mechanical and physical properties of solid alder wood such as bending strength, modulus of elasticity, compression strength parallel to grain, equilibrium moisture content, density were conducted accordance to TS 2474,TS 2478,TS 2595,TS 2471,TS 2472, respectively.In the result of that it was shown the shear strength of plywood panels manufactured with MUF resin were higher than those of the test panels manufactured with UF resin. Plywood panels manufactured from alder grown in Giresun/Espiye region (group 1) gave the best formaldehyde emission values.Key Words: Alder, plywood, Density, Equilibrium moisture content, Shear strength, Bending strength, Modulus of elasticity, Compression strength parallel to grain, Formaldehyde emission