The decorative paper industry is a highly competitive industrial sector. Manufacturers of impregnated paper for face-laminated medium-density fibreboard (MDF) and particleboard need to significantly reduce production costs to increase profit margins. Melamine formaldehyde resin (MF) formulations are a costly raw material widely used for impregnating and coating such papers. In this study, the effect of resin-impregnated digilam decor paper on the physical, mechanical and surface properties of MDF board was investigated using a new melamine-urea-formaldehyde resin formulation.100% melamine (MF), 100% urea formaldehyde (UF) and 50% MF + 50% UF resin were used in the impregnation process of the digilam decorative papers. In physical properties, the minimum water absorption and thickness swelling values after 24 hours of soaking in water are 21.93% and 1.81% in UF, 16.84% and 1.22% in MF, 13.79% and 1.22% in UF+MF, respectively. In mechanical properties, the values of bending strength and modulus of elasticity in bending were obtained as 32.14 and 3957.73 N/mm2, in UF, 40.39 and 6983.82 N/mm2 in MF, and 36.96 and 5290.06 N/mm2 in UF+MF, respectively. The results of simple statistical analysis of the data obtained from the surface tests have determined that the resistance values against staining, water vapor and scratching on the board scovered with digilam decorative papers produced using MF and UF + MF meet the limits required in the relevant standards. As a result, the boards covered with MF impregnated digilam decorative papers showed better performance than the boards coated with UF and UF+MF impregnated digilam decorative papers.
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