Adhesives based on recycled polyurethane foam for wood based materials

Wood materials are increasingly being used in the construction of structural beams, sports equipment, etc. This study was carried out to investigate a new adhesive materials based on recycled polyurethane (PUR) foam. Mechanical tests, DSC, and FTIR were used to study the properties of the composites. After preparing the two-plate systems (beech, oak, walnut and pine tree) glued by the new adhesives and compared with adhesives based on polyvinyl acetate (PVA) the bonding strength and resistance of delamination were determined. Bond strength and water resistance (resistance of delamination) of two wooden plates bonded by the new adhesives were tested using standard methods. The highest shear strength of 16.1 MPa was received with oak wood bonded by the PUR adhesive. All samples prepared with the PUR adhesive were subjected to shear strength testing showing that the PUR adhesive is superior to PVA. In the water resisting test wood species bonded by PUR adhesive had a higher delamination rate than those bonded using PVA glue.