Coatings Withstand Extreme Forming
May 12, 2009
Product designers often are faced with difficult challenges such as creating a durable yet flexible surface that can withstand extreme forming specifications. Prepainted metal may provide a solution suggests the Cleveland-based National Coil Coating Association.
Coating formulators have developed polyurethane coatings that are flexible enough to withstand extreme forming, folding and embossing without cracking, chipping or scratching. Unlike post-painting processes, coil-coated metal is precleaned, pretreated, preprimed and prepainted, then formed after these processes have taken place. Often, the applied coating is more flexible and forgiving than the metal substrate.
According to the NCCA, prepainted metal can be adapted to fit most product designs that currently use bare flat sheet or coil stock with only slight modifications. The organization recommends multi-stage forming when producing rigorous bends. For instance warm forming at 125 to 160°F (52 to 71°C) helps in cases of severe fabricating. The equipment supplier can provide expert advice on exact specifications.
With proper planning and engineering, coil-coated metal can be formed, even to extreme specifications, with no damage, loss in surface quality or beauty, according to NCCA. Many products are made with coil-coated metal, including household appliances, semi-trailer doors and side walls, Venetian blinds, stadium bleachers, dry-erase boards, under-counter lighting and can lights, non-stick bakeware, cool-metal roofing, window cladding and screen frames, agricultural equipment, residential and commercial doors, and garage doors.
For more information on how coil-coated metal can meet extreme forming needs, contact a coil coater using the directory found at www.coilcoatinginstitute.org/supplier.