What are the advantages of powder coatings?
Powder means no solvent wastage – simply more environmentally friendly
There is no costly wastage of solvents which, at application viscosity, constitutes up to 70% of conventional liquid paints. These solvents, which volatilize during application and stoving are usually not recoverable. Legislation introduced in various parts of the world has prohibited their discharge into the atmosphere which means in some cases after-burners must be installed to eliminate the solvents with an attendant increase in costs.
Powder means no effluent disposal problems
Water wash spray booth are often used with liquid paint systems. The overspray is often emulsified in the water, which in some cases is put directly to drain or in other cases, allowed to settle out in sludge tanks. Powders do not give rise to these problems and the associated extra costs.
Powder helps reduce air pollution
Any over sprayed powder is recoverable – great news in reducing waste, – and no powder need escape into the atmosphere.
Powder helps reduce the health hazard to operators
As powders do not contain solvent there is a marked reduction in nose, mouth and throat irritation. Any liquid paint which comes into contact with an operator’s skin needs to be washed off with solvent, and then removed by emulsifying with soap in hot water. Sometimes special industrial hand cleaners even should be used.
In general powder does not cause skin irritation though in rare cases individuals may react to certain types of powder. The powder can be removed from the skin easily by washing with warm water.
Powder offers a reduction in fire risk
There are no solvents in powder coatings this reduces the associated fire risk, but this in turn gives cost savings on statutory safety features in your plant, and reduces insurance premiums as they aren’t subject to flammable liquids regulations
With powder, processing time is reduced
Powder processing times are generally shorter than those used for liquid paints since, as there is no solvent, no flash off period is required. Instead, the powder coated articles can pass directly into the oven. This gives substantial saving in space and time.
Reduced energy requirements compared to solvent based paints
There is a cost saving during stoving because no energy is required to evaporate solvent and in the oven the air turn over rate is significantly reduced as there is no solvent which must be removed from the air in the oven. This means less heating of air and less energy.
Reduced energy requirements compared to aqueous based paints
Aqueous or water based paints also contain organic solvents so there are the energy saving above associated with the removal of solvent from the coating and air in the oven. Additionally, with aqueous based paints there is a need to control the temperature and humidity of the application area precisely which is an additional cost when compared to powder coatings.
Powder coatings are ready to use
You can use our powders immediately. There’s no need to mix them with anything else, like solvents or catalysts.
Great news if you’re looking to save time on the shop floor.
Powder offers superior film properties
With solvent based systems, the solvent balance must be carefully adjusted to the polymeric type, application and curing conditions, as many film defects can be traced directly to incorrect solvent balance. With powders no such condition exists and in general superior film properties such as adhesion and corrosion resistance are obtained with powders, compared to polymers deposited from liquid systems.
With powder, damaged parts are easily rectified
Damaged or poorly coated areas can be easily rectified before baking by simply blowing off the powder and re-coating.
With powder, the air requirements are reduced – more cost savings
The air extraction in a powder spray booth is a lot less than for solvent based paints. Great news if you’re looking for economies in ventilation and the consequential heating of work areas. As less warm air needs to be replaced in workshops, less dust is attracted and there is less air-draught for the operators to contend with.
95% powder utilization
With powder, material loss can be kept to less than 5%. Any powder overspray can be recovered, and the recovered powder can be blended with virgin powder to provide up to 95% utilization. Almost all of what is in the powder box finishes on the coated article. Many liquid coatings contain a high level of volatile content which is lost during the painting process meaning perhaps only 50% of what is in the tin actually ends up on the workpiece.
With powder, you get a controlled film thickness
You can achieve a controlled more uniform and, if necessary, higher film thickness in one application with powder than with conventional liquid paint system. There are also some superb thin film thickness powders available with Interpon.
With powder, a huge range of coatings and effects are available
Whether it’s decorative, functional or both, powder coatings offer a viable solution. An
enormous color range, matt, satin, gloss, metallic, textures, soft touch – you name it. And the functional properties range from anti-bacterial to corrosion protection to easy cleaning.
Operator training is minimal with powders
Operators require much less training to apply powders than solvent based systems.
Powder is cleaner to use
Applying powder is much cleaner than applying wet paint. A spray booth can be cleaned down quickly and easily and any spillages of powder outside the booth can be removed with an industrial vacuum cleaner.
A powder application plant is less costly
A powder application plant, either manual or automatic, is extremely simple to operate and less costly than a multicoat liquid system.
Powder is flexible – non-metallic surfaces can be coated
Is not just metal that benefits form powder coatings. Surfaces such as glass and certain thermosetting moldings which can withstand the stoving temperatures involved can be powder coated. The scope of materials which can be used is ever-increasing as advancements in lower bake technologies are made.