The PPA 571 coating protect metal fencing from corrosion for 15 years

Thermoplastic Powders

Posted on: November 3rd, 2014 by byersbushblog

In the world of powder coating, there are different types of resins that can be used to cover a part. The two categories of resins are thermoplastic and thermoset. Thermoplastic is commonly used because to powder melts when heat is applied so it can flow onto the part. Thermoplastics also maintain the same chemical makeup in powder and solid form. Thermoset powder does the same thing when applied to parts but the powders create a film that creates a different chemical makeup than the original powder form has.

Thermoplastic or Thermoset

Thermoplastic coatings to provide a smoother finish that thermoset coatings, but in hot temperatures, thermoplastic coatings can become molten again. Thermosetting coatings with their new chemical makeup stay solid in high heat. They adhere better to metal parts and they show more resistance to chemicals than thermoplastic resins. The benefits of the thermoplastic technology is the fact that less energy is needed to heat the resin. Because of the lower rates of adhesion, many parts are either primed or pretreated in another way to improve the adhesion.

Different Types of Resins

Thermoplastic powders come from different types of resins. They include nylon, polyester, polyolefins, and polyvinyl chloride. Each type of resin works differently than the others. The thermosetting resins include epoxy, urethane polyester, and acrylic.


Nylon powders come from type 11 or nylon 6/10. These types of coatings create a smooth finish that is impact resistant, durable, and tough abrasion resistance. Most shops will use a primer with a nylon-based coating because it adds to the adherence of the powder coating. This type of coating is best used with items that require low friction, like shelving units, food prep products, light fixtures, and seats. Nylon powder coatings are also used in the marine industry, especially on hardware pieces like fittings and bolts.


Polyester is one thermoplastic powder that does not require the use of primers or pretreatments. This powder coating resin is durable in the weather and has strong UV resistance, too. Polyester coatings work well on pieces that will be outdoors because of the durability, but they are more difficult to apply than other thermostatic coatings.


Polyolefin powder coatings are readily identifiable by their waxy films. This type of coating is lower in cost than other thermostatic technology and it is also much easier to apply. They are resistant to chemicals and they do not absorb water, which makes them good choices for equipment that is used in laboratory and in automotive parts. Even though they are good with chemicals, polyolefin coatings break down with certain solvents.

Polyvinyl Chloride

Polyvinyl chloride is more commonly known as PVC and this type of powder coating gives a glossy and flexible coating that is resistant to salt water spray and challenging weather conditions. With the water resistance, PVC coatings are often used with chain link fencing as well as in appliances like dishwasher baskets and freezer shelves. PVC coatings do require primers.


Epoxy coatings are used to provide insulated coatings for electrical parts. They also provide protection in locations with a wide variety of temperatures. Epoxy coatings are usually quite thick and they can often withstand temperatures over 150͒C. This type of coating can get chalky with excessive UV exposure, so it is usually applied to parts that are not used outside. Epoxy coatings can be made to look decorative and they come in many different colors.

Urethane Polyesters

Urethane polyesters are preferred when a thin, but tough film is needed. This type of coating is commonly used on car wheels and trim as well as other items that need a durable, but decorative finish. The film is often compared to the urethane paint that is used on planes, trucks, and buses.


Acrylic powder coatings are also durable with a thin finish. They are resistant to chemicals, but they have trouble with impacts and flexibility. In many instances, they are used over metals like chrome and brass, and sometimes they are applied with epoxy for better binding. Acrylic powder coats are generally attractive when finished and they are often used on products that need a high quality finish. Acrylic powders are being tested as an option for clear coats over automotive body paint.

At Byers Bush are proud to use thermoplastic powder coating product. For more information, please give us a call at 905-625-4334.

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