The rationale for the modes of bonding veneer in the manufacture of plywood, manufactured with the use of melaminecarbamideformaldehyde resins
Improving the efficiency of production of plywood, its a competitive industry in a number of panel materials is an important issue. The main objectives are improving performance, reducing toxicity of the product, its material, energy and labor cost. The tasks are solved by the use of new resins, adhesives formulations, technological approaches, in particular through the use of melaminecarbamideformaldehyde resins, modified aèrosilom technical. Studies have allowed to justify the modes of gluing of the veneer packs of different thickness with the application of the modified adhesive based on melaminecarbamideformaldehyde resin. By reducing pressing time were decreased exposure at maximum pressure and the pressure reduction in the second stage of compression to reduce thinning of plywood. Set the required time of exposure at maximum pressure and the pressure in the second stage of pressing, which provide the necessary strength and minimum thinning of plywood. Describes the modes of gluing of the packages of veneers of different thickness, the values of thinning of plywood.