The Evolution of Coil Coatings and Paint Systems for Metal
Numerous finishes redefine what is possible for fabricators and designers
There are various options for applying paint to metal. In the field it is common to see spray or brush applications; in the factory you can spray, powder coat or coil coat. However, when it comes to the performance requirements of today’s metal architecture, products like metal composite materials almost exclusively use the coil coating process to apply finishes that look practically flawless and can last.
Coil coating is the method by which a metal coil is coated in a continuous process prior to fabrication. The metal coil is brought through an uncoiler, a line-loading accumulator, processed and painted according to requirements, brought through a finish line exit accumulator and then rewound on a recoiler. These coils are finished and cured in a continuous process. Though traditionally used for aluminum substrates, this procedure can be applied to other metals, such as steel.
According to the National Coil Coating Association, prepainted metal “holds up better over time than post-painted surfaces ...” With robust quality assurance programs, coil-coated metal has a clear advantage with regards to consistency. The continuous manufacturing also allows for lower costs and greener manufacturing with reduced waste, increased efficiency and the collection of VOCs.
Read more about coil coating and paint systems in our featured column on Metal Construction News.