Production Processes
Powder Paint
In 1970, paint producers looking for alternatives in response to environmental and ecological sensitivity to wet paints advanced the production of the first polyester paint resistant to outdoor conditions. Here, the alloy quality of the profile to be powder painted is very important.
For example, for alloys 6063 and 6060, it is preferable that the copper content is not greater than 0.1% and the Mg/Si ratio is not less that 0.60. Further, the raw materials used must be homogenous. If these properties are not enforced, then the sensitivity of the material to filiform corrosion increases. The extrusion process must conform to standards and there must be no scratches, tears or burrs on the profile's surface.
Phases of the Process:
• A preliminary chemical process is undertaken to prevent the powder paint applied to the profiles from adhering to the under-surface and to increase the corrosion resistance of the sub-layer. The environmentally sensitive ‘Cromfree’ process is automatically applied.
• A suspension then covers the visible surface.
• The Super Corona Gun coats the surface with powder paint.
• Curing
The specifications of the powder paint product are set down in the QUALICOAT specifications. Powder paint coated profiles have decorative appearances. Furthermore, the resulting surface is more resistant to ultraviolet radiation and sudden temperature changes.
The capacity of the powder paint facility is 18,000 tonnes per year.
Max. profile length: 7,000 mm (including suspension trace distance) Layer Thickness: min 60 microns
