| Summary: In this study; before the production session; some chemical properties of wood material were analyzed such as pH and Volatile Organic Compounds. In an addition to this; for searching the bonding strength between wood and adhesive (ABES=Adhesive Bonding Evaluation System), the shear strength was defined. In this study; some physical and mechanical properties of structural composite boards based on coconut lamella produced with widely used industrial PVAc, MUF and UF adhesives were defined. According to the data of the researches, the needed press parameters were prepared and then the production was started. The thickness of the board was defined as 40mm and for this aim; face layers lamella thickness 9mm, core layer lamella thickness 22mm were prepared. The high density lamellas only used for the face layers and the medium and low density lamellas were used for core layers. For creating layers from lamellas, PVAc glue, for bonding the layers with each other, the PVAc, MUF and UF adhesives were used. The layers were prepared by caring the opposite direction. After pressed boards; some physical properties, such as; Moisture content, density, bending strength and some mechanical properties like; modulus of elasticity were described. According to gotten results; the physical and mechanical properties of the produced boards are higher than the standards. On the other hand; lamella symmetry, the bonding of lamellas and production parameters were found as important factors on product quality.
Key Words: Coconut tree, lamella, structural composite lumber, VOC, ABES, bending and shear strength, physical, mechanical and chemical Properties. |
