Originally powder coatings were applied as metal finishing coatings only. However
with the development of powder that can be applied and cured at low temperatures,
the market has opened to heat sensitive substrates such as plastics and wood.
Radiation curing (UV or electron beam) allows the curing of powder on heat sensitive
substrates by reducing the curing temperature to below 121°C. Ongoing development
has been devoted to formulating powders that can cure at temperatures below 100°C
without compromising durability or quality.
Powder coating on wood is growing significantly. By developing powders with reduced
heat requirements and by developing a uniform density wood product, wood manufacturers
and their customers are now able to powder coat a wide range of wood products. Manufacturers
of home-office furniture, kitchen cabinets, children's furniture, and outdoor grill
tables are discovering that powder coating makes these "hard-use" products
retain their new look much longer.
One of the biggest breakthrough in the wood market is the use of engineered wood
materials such as medium density fiberboard (MDF). MDF is very suitable for powder
coating because of its low porosity and homogeneous surface. Curing of powder on
MDF can be accomplished by infrared, or UV light in conjunction with infrared or