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Dip coating in thermoplastic polyethylene powders

Views: 11     Author: Site Editor     Publish Time: 2018-09-07      Origin: Site


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.


Features are:

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

Non-toxic coatings.


Typical components are:

  • Medical Furniture

  • Transmission and Gearbox components

  • Stacking Chairs

  • Domestic and commercial wirework

  • Wheelchair parts

  • Automotive Springs, Brackets & Pressings.

  • Stadia Seating

  •  Outdoor Street and Park Furniture

  • Litter Bins

  •  Automotive after market accessories


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