What is PVA emulsion ?

PVA glue is a polyvinyl alcohol environmental protection adhesive. It belongs to a new production method of pollution-free and quick drying water-based adhesives. It can be applied to wood-based panel production, which can achieve the environmentally friendly and cold pressed production of wood-based panels.

PVA is a colorless, generally non-toxic, thermoplastic adhesive prepared by polymerizing vinyl acetate. PVA was discovered in 1912 in Germany by Dr. Fritz Klatte. It is one of the most widely used adhesives for aqueous dispersions. PVA is made from a water-based emulsion of a widely used glue, variously known as wood glue, white glue, carpentry glue, school glue, or PVA glue. PVA is widely used in fiberglass-reinforced plastics to improve its anti-stress and anti-shrinkage properties. It is also used in car lights to promote lighting performance. In addition, the addition of PVA to cement / concrete can improve water resistance. PVA is an emulsion, not a real aqueous solution, so it has considerable hydrophobic properties after drying the film. Adjustment and hardening of PVA is performed by evaporation or removal of water from the substrate. PVA adhesives form a transparent, hard film that is weather resistant and resistant to water, grease, oil and petroleum fuels. Additional properties include original viscosity, almost invisible bond line, softening at 30-45 ° C, good resistance to biological decomposition, low resistance to crawling under load, and low cost. PVA adhesives and copolymers are also used in hot melt adhesives, sealants, fabric coatings, wood plastics, and inks.

Compared with the current market similar with adhesive, does not contain formaldehyde and other toxic ingredients (used to modified urea formaldehyde resin and melamine resin or above the E2 level environmental protection water soluble phenolic resin, adding curing agent and gypsum products, can further reduce the free formaldehyde content), no pollution to the production and use of the environment. Low cost, simple process, good bonding effect. And drying solid speed. For wood-based panel production, has the advantages of energy saving effect without pressing.