The dipping of metal components into Thermoplastic Polyethylene Powder or, Fluidised Bed dipping, as it is sometimes known, is the oldest form of plastic coating and goes back to the time when Plastic Coatings was established in 1952.
Thermoplastic coating material is ground into a fine powder and kept in a steel box (Fluid Bed) open at the top and with a fine gauze across the bottom, fine enough not to let the powder particles through. Air is then introduced up through the gauze which makes the powder particles rise and act like a box of fluid, hence 'Fluidised Bed'.
Metal components are pretreated, usually degreased and shotblasted, heated up to between 250 and 400 degrees C depending upon the coating required, then dipped into the Fluid Bed of plastic. The Thermoplastic Polyethylene Powder particles melt onto the metalwork forming a smooth continuous coating.
Coating materials used can be Low Density Polyethylene.
Thicker coatings (0.3mm up to 1.00mm)
Smooth continuous coating
Very long service life
Extreme corrosion resistance
Excellent chemical resistance
Good Edge(metal) coverage
Excellent UV and weather resistance
Typical components are:
Transmission and Gearbox components
Domestic and commercial wirework
Automotive Springs, Brackets & Pressings.
Outdoor Street and Park Furniture
Automotive after market accessories