All About Powder Processing

Have you ever closely noticed at the finishing of your car, especially the way its colour seems to stand apart? This is due to a special metallurgical process that manufacturers of many types of industrial and domestic products nowadays use to paint their goods. Apart from its beautiful look, the paint is tough and can withstand a lot of wear and tear compared to normal spray painting. Welcome to the world of powder processing, also known as powder coating.

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Chances are that you are using a gadget in your home or office, painted using this process, and are not aware about it. Let us understand in details about this procedure and the massive role it plays in the modern generation industrial finishing market.

What exactly is powder processing?

It is a dry finishing procedure, which has of late become highly prevalent, ever since its introduction during the early 1960s. Such is its popularity that it nowadays represents in excess of 15 percent of the overall industrial finishing market. Thanks to its ease of application, an increasing number of industries nowadays depend on this process to finish a wide range of products. More and more companies nowadays depend on powder processing to get a durable and high quality finish of their products. This procedure further allows for improved efficiency, durable finish, and simplified compliance for the environment, permitting maximum production. Used as both decorative and protective finishes, you can get powder coatings in a nearly infinite range of textures and colours. Thanks to technical advancements of this process, one can now get excellent performance properties from it.

How does this process work?

This process depends on PRS (polymer resin systems), mixed with flow modifiers, levelling agents, pigments, curatives, as well as other types of additives. One needs to mix these components by melting, following which one has to cool the mixture and grind it into a uniform and fine powder. Industries that employ this process resort to a procedure known as ESD (electrostatic spray deposition) to apply the powder coating on the surface of a metal substrate. A spray gun is required for the application process that puts an electrostatic charge to the fine particles of powder that are then attracted by the grounded portion. The parts, post application of this coating pass through a curing oven in which the coating chemically reacts to the heat to generate long molecular chains, which leads in high cross-link density. The molecular chains so formed are extremely resistant to breakdown. Although there are several methods of applying powders, this process is most commonly used.

It can also be used for coating non metallic surfaces as well

The majority of powder processing coatings can be applied to substrates that are non metallic in nature such as medium density fibre board as well as plastics. Durability is one of the major advantages of this method of coating. Another advantage is its low costs compared to other types of coatings. This is the reason powder processing is increasingly becoming the favourite of many industries who previously used to paint their products.