Fluoropolymer Coatings

Coatings materials include PTFE, PFA, PVDF, ECTFE and ETFE. The spray application process has a limitation to the thickness that can be achieved which depends on the material type.
Typically, PTFE spray coatings are used mainly for non-stick applications because the coating build up achieved is quite low.

PFA and some modified versions can be built up to higher thicknesses, typically 0.5mm to 1.0mm

Spray coating is a useful technique on complex shapes or on external surfaces such as agitators and impellors.

Coating process

The surface is firstly prepared by shotblasting and priming. The item is then heated and the fluoropolymer material is electrostatically sprayed as a fine powder.
As the polymer makes contact with hte heated surface it melts and the coating thickness is gradually built up by repeated application.




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