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Powder coating-2


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Powder coating-2

  1. 1. Powder Coating
  2. 2. Powder coating is a finishing technology where adecorative and highly protective coating can be applied to a widerange of products. The process involves spraying finely ground,electro-statically charged particles of pigment and resin onto asurface to be coated. The charged powder particles adhere to theelectrically grounded surfaces and then are heated and fused intoa smooth coating in a curing oven.What is it:
  3. 3. What does Powder Coating Offer Superior Appearance Mechanical Resistance Properties Corrosion Resistance Solvent Resistance Highly durable: chip, scratch, fade andwear resistant Ready to use and requireno mixing, Solvents,or catalysts
  4. 4. Liquid Finishes Vs. Powder Coating Solvents Necessitate venting, filtering, andsolvent recovery systems that is not necessaryin powder coating. Liquid Spray Coating achieve material usage of20-85% while powder coating has a Materialusage of 95-98% Liquid overspray is lost in filterswhile 99% of Powder oversprayis collected and reused
  5. 5. Powder Types Thermoplastic: Powder melts and flows to form a film. Continues to have the same chemical composition when itsolidifies Will re-melt when heated. Thick coating surface and not in same market as liquid paint. Examples Polyethylene Polypropylene PVC Thermoset: Powder melt flow and cross-link chemically to products Cured coatings have different chemical structures than the basicresigns. Will not re-melt when reheated Can produce thin paint like coating of 0.001 – 0.003 inch thick. Examples Epoxy Hydroxyl polyester (urethane)
  6. 6. Process
  7. 7. Process