Powder Coating Terminology
The following are some terms relating to powder coating:
Acrylic Resin: Acrylic resin is made from chemically altered parts of acrylic molecules. Certain acids and alcohols can be used for this chemical reaction. Acrylic resins are clear and deal well with prolonged exposure to light, which makes them ideal for use on appliances and automotive parts.
Back Ionization: Back ionization, or electrostatic rejection or repelling, happens when the electrostatic buildup on a substrate limits or prevents the application of additional powder coating.
Curing: Curing is a treatment required for certain powder coating, mainly thermoset powders. This type of powder coating needs to be heated in order to convert the dry powder into a solid layer across the substrate.
Epoxy: Epoxy is a kind of powder coating that contains epoxy resin. This powder coating does not have a very glossy finish and does not hold color well, but it is strong and resists corrosion well.
Fines: Fines are tiny powder coating particles. They are usually no larger than 10 microns in size.
Grounding: Grounding is the addition or removal of an electrical charge.
Pigment: Pigments are particles in a powder coating mixture that imbue specific qualities to the substance. Pigments can, of course, add color, but they can also help with other qualities, such as resistance to corrosion.
Purging: Purging is cleaning an area entirely once a powder coating project has been completed. This prevents the first substrate’s powder coating from coming in contact with the next substrate.
Resin: Resin is a general term that applies to a solid or semi-solid organic substance. Resins can be natural or synthetic, but they are usually dense and lack a distinct melting point. Resins are usually polymers, which means they are a combination of different substances.
Substrate: In powder coating, a substrate is a part that will be treated or painted using powder coating.