Investigation of the effect of adding melamine resin impregnated paper waste on physical and mechanical properties of medium-density fiberboard (MDF)

To investigate the effect of melamine resin impregnated paper waste on physical and mechanical properties of medium-density fiberboard (MDF), a mixture of melamine resin impregnated paper waste and wood fibers in the ratio of 0.100, 10/90, 20/80, 70.30 was used. After gluing the fibers with urea-formaldehyde adhesive in 10% (relative to the dry weight of the fibers), the fiber cake in a laboratory press at a temperature of 170 °C, under the pressure of 35-40 bar and pressing time of 6 min to they were compressed to a thickness of 15 mm. The results obtained from zeasuring the physical and mechanical properties of the boards showed that increasing the amount of melamine resin impregnated paper waste in the boards led to increase the modulus of rupture, modulus of elasticity, internal bonding, while the thickness swelling after 2 and 24 hours of immersion was decreased. Therefore, the findings of the present study statistical analysis showed that the best treatment in this study is the use of 20% melamine resin impregnated paper waste in the production of medium-density fiberboard, while achieving the desired levels of physical and mechanical properties specified in the standard range related to this type of board, can be prevent waste loss and environmental pollution.