Quality improvement of plywood products: veneer gluing
At present, the main adhesives used in the production of plywood are PF phenolic resin and UF urea-formaldehyde resin, among which urea-formaldehyde resin is the main one. The curing agent used in the preparation of UF resin is NH4CL, and the dosage is 0.4-1% of UF resin mass. The suitable active time and curing time are achieved. The required active time of the glue is 6-8 hours. When the temperature is high in summer, the activity of the glue is prolonged. Buffer and curing agent can be used together, PF adhesive does not need reinforcing agent before use, but if filler copolymer can be added, the toughness and strength of the adhesive layer can be improved in sizing. At present, roller sizing is mainly used in China, mainly because of its mature technology and simple structure. However, in the early stage, double roller sizing is not easy to control, and its efficiency is low. If four roller sizing is used, it is difficult to control the sizing volume and efficiency. The sizing machine can improve the sizing uniformity and control the sizing amount.
Quality improvement of plywood products: veneer gluing ,Searches related to veneer gluing ,
gluing veneer to plywood
better bond veneer glue,
heat activated veneer glue,
gluing veneer to solid wood,
gluing unbacked veneer,
working with veneer plywood,
iron on veneer,
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