Oftentimes referred to
as "dry painting," powder coatings are the fastest growing finishing
technology in North America. Thrust into the spotlight because of
their environmental advantages, they are here to stay due to their
numerous benefits. Powder coatings are now coating everything from
automobiles to lawn furniture.
The term "dry painting" refers to
powder coatings' lack of liquid, solvent or water in their formula.
It is applied "dry" directly to a surface in a fine powder form.
A powder coating is made of 4 key ingredients: resins,
pigments, curing agents and additives. A powder coating manufacturer
mixes these ingredients according to its formula. The mixture is
then fed into an extruder which melts and cross-links the materials.
After it cools, the material is chipped and ground into a fine powder.
The charged powder is spray-applied to an electrically grounded
surface. Finally, the coated piece is heated so that the powder
coating is fused into a smooth finish.
Because they don't use
solvents in their formula, powder coatings release little to zero
volatile organic compounds (VOC) into the atmosphere. This not only
helps our environment, but it also reduces costs for finishers because
they no longer have to purchase and maintain expensive pollution
control equipment. In addition, most powder coating overspray that
does not adhere to the substrate can be reclaimed for future use.
As a result, finishers utilize nearly 100 percent of their coating
material leaving little waste and less clean-up.
As a leader in the coating industry,
Bayer is dedicated to the powder coating market and is committed
to offering its customers the best possible service. This includes
a wide selection of coating materials with the ease of utilizing
one supplier. Bayer also has a worldwide technical support network
with agencies located in over 150 countries.