A novel protective surface fi nish for industrial vinyl fl ooring uses uvcured powder coatings.

A novel protective surface fi nish for industrial vinyl fl ooring uses uvcured powder coatings. A French maker of industrial and commercial fl oor coverings, Groupe TLM, was looking to improve the stain and scratch resistance of its PVC interlocking fl oor tiles. The company chose uv powder coatings due to such advantages as reduced waste, no VOCs, low-temperature cure (PVC melts at 175 to 180 C), small space requirements and fast curing. DuPont Powder Coatings (U.S. offi ce in Houston) developed a clear uv powder that met TLM's requirements. DuPont worked jointly with Fusion UV Systems, Gaithersburg, Md., and French fi nishing line integrator Cy Franchon. A new automated production line for 400 tiles/hr was built for TLM. A robot loads tiles from pallets on a fl at conveyor running at 9.8 ft/min. Automated electrostatic spray guns apply 35 to 40 microns of the uv powder. TLM's patented PVC compound eliminates the need for a surface treatment to promote adhesion of the powder. Next, the tiles enter an infrared oven where the powder melts and fl ows at 266 F. The tiles then pass beneath a row of eight Fusion UV F300 lamps covering a width of 49.2 in. to cure the coating. Another robot palletizes the tiles for shipping. Fusion UV: (301) 990-8700/www.fusionuv.com .DuPont: (800) 247-3886/ www2.dupont.com/Powder/en_US

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