There are different types of powder coating, and two of these are nylon powder coating and polyester powder coating.
But which should you use: nylon or polyester?
Nylon is an increasingly popular thermoplastic powder coating. Although, when compared with other powder coatings, including, polyester it is expensive, it is also highly effective.
As a thermoplastic polyamide resin, nylon has a chemistry that does not change when it is heated up to melting point and adhered to a metal surface.
It is a renewable, raw material that mainly comes from the vegetable oil that is extracted from castor beans.
Castor beans contain the poisonous substance ricin, but they can also be transformed into polyamide 11, which is a thermoplastic polymer member of the nylon family.
This polymer blend is both stronger and lighter than more conventional structural materials.
The castor bean plant thrives in warm climates, but it is not grown as a food crop, which makes it an ideal, renewable resource for nylon powder coating.
Nylon powder coating is very strong and resilient, but can be applied as an extremely thin layer.
You usually apply it via a fluidised bed.
This method differs from the spray method associated with other powder coatings in that the part to be coated is dipped into a container holding the nylon powder coating.
Air flows upwards through the bottom of this special container, which fluidises the coating.
The reason for using this application method is that the particles in nylon powder coating are coarser than in other types of coating, and are therefore less easy to apply using a spray gun.
Once you have applied the coating in this way, you then cure it in a baking oven. This creates a solid, film coating.
For resistance to wear and impact, nylon powder coating is high performing.
Polyester powder coating is a polymer-based dry coating that offers a durable, adaptable alternative to liquid paint.
There are various forms of polyester powder coating, suitable for indoor and outdoor applications, some tougher than others.
Polyester powder coating, or PPC, provides a cost-effective answer to protecting various metallic substrates.
Applied via a high pressure, electrostatic spray, PPC produces an excellently uniform level of coverage.
The curing process, in a baking oven, melts and fuses the combined polymer and pigment powder into a strong, smooth coat, which then acts as a protective skin for the surface it is covering.
PPC is cost-effective and fast-working.
It combines flexibility with a high degree of mechanical resistance. Standard polyester powder coatings also offer up to thirty years of effective UV resistance.
More advanced, super-durable polyester coatings will provide longer lasting colour and improved strength and resistance.
For various metal substrates that require a finish, PPC provides a protective coating that supports resistance to corrosion but can also be decorative.
As an application, PPC has certain inherent benefits:
Nylon and polyester powder coatings each have benefits and are well-suited for different applications and locations.
Both represent a significant advance on liquid paint coatings.
However, if protection is your main priority, then nylon performs extremely effectively here.
It is also ideal for warm-to-touch applications such as handrails and commercial outdoor furniture.
Nylon coated surfaces are virtually impervious to pressure extremes, making them extremely hard-wearing.
Nylon powder coating, once applied and cured has better chemical resistance than polyester.
On the other hand, polyester powder coating is less expensive, and highly suited to a broad range of applications, including external architectural finishes, street furniture and heavy machinery.
It has excellent weather and UV resistance, and due to its availability in a wide range of colours it looks good aesthetically.
In many situations you can apply PPC without a primer, unlike nylon, and also unlike nylon, it will not re-melt in high temperatures.
Factors in choosing your powder coating very much depend on its end application.
We are happy to advise. For more information about powder coatings, please contact us.