Characteristics and uses of melamine resin adhesive

The melamine resin glue includes melamine formaldehyde resin glue and melamine urea formaldehyde resin glue. The heat resistance and water resistance of the two kinds of glues are superior to those of other wood industry glues. However, the price of melamine in the resin raw material is relatively high, so at present, various enterprises at home and abroad are mainly used for manufacturing decorative veneer film, and it is not used as a glue. Melamine urea formaldehyde resin, the manufacturing cost is slightly lower, but the veneer film made by the same has the defects of poor transparency, large hygroscopicity, sticky film and the like, so it is rarely used, and now commonly used is melamine formaldehyde resin glue. . It is made by polycondensation of melamine and formaldehyde as raw materials under certain conditions.

The resin is a colorless, transparent, viscous liquid that can also be made into a white powder for easy storage. The resin is soluble in water and ethanol and is a thermosetting resin. The cured film is excellent in water resistance, heat resistance, abrasion resistance, chemical resistance and corrosion resistance. However, in the use of this glue, there are defects such as easy freezing at low temperature, poor preservation performance and easy brittleness of the film, which has a certain influence on resin storage, product quality and service life. In order to overcome this shortcoming, therefore, the melamine formaldehyde resin is modified in production, and the urea is often added to copolymerize it for modification, which can prolong the storage time of the glue, add alcohol to etherify the resin, or esterify with organic acid. Increase the flexibility of the resin and reduce the brittleness of the resin.

Because of its extremely excellent properties, this resin adhesive is commonly used in the manufacture of surface decorative veneers and is widely used in furniture, construction, vehicles, ships and the like.

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