Powder coating can be achieved through one of two processes: thermosets and thermoplastics. Thermosetting involves additional chemicals that react with the powder during heating. In the thermoplastic application process there are no additional chemicals and instead they melt and flow into the final layer. Both powder coating processes look quite similar, except for this distinctive feature. Thermosetic or thermoplastic powder is created by taking the powder and tying the elements together. Second, heat the mixture, extract the product, then break the polymer product into chips. Finally, it can be ground into a fine powder.
Each of the powder coating processes is usually done after the preparation of the metal to be coated. The object is cleaned with special care to remove any debris and oil that may inhibit the attachment of dry powder. Next, the dry powder is applied electrostatically – a process by which the dust and object particles are charged by a high voltage electrostatic overvoltage. This electrostatic powder coating step considerably increases the efficiency and productivity of the coating process by almost 95%. Less paint is wasted and the metal object is completely covered.
The powder coating is then hardened to temperatures of up to 400 degrees for ten minutes so that the finish can be fixed to the object. During the process, the powder melts and flows around the object. The heat not only melts the powder, but binds the polymer into a heavier polymer that binds in a grid-like finish. The hardening not only covers the metal product, but also binds the polymer into a tighter and heavier finish.
.