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Powder Coating

Powder Coating . Jason Fox Material Science Meen 3344. What is it:.

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Powder Coating

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  1. Powder Coating Jason Fox Material Science Meen 3344

  2. What is it: Powder coating is a finishing technology where a decorative and highly protective coating can be applied to a wide range of products. The process involves spraying finely ground, electro-statically charged particles of pigment and resin onto a surface to be coated. The charged powder particles adhere to the electrically grounded surfaces and then are heated and fused into a smooth coating in a curing oven.

  3. What does Powder Coating Offer • Superior Appearance • Mechanical Resistance Properties • Corrosion Resistance • Solvent Resistance • Highly durable: chip, scratch, fade and wear resistant • Ready to use and require no mixing, Solvents, or catalysts

  4. Liquid Finishes Vs. Powder Coating • Solvents Necessitate venting, filtering, and solvent recovery systems that is not necessary in powder coating. • Liquid Spray Coating achieve material usage of 20-85% while powder coating has a Material usage of 95-98% • Liquid overspray is lost in filters while 99% of Powder overspray is collected and reused

  5. Powder Types • Thermoplastic: • Powder melts and flows to form a film. • Continues to have the same chemical composition when it solidifies • 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 basic resigns. • Will not re-melt when reheated • Can produce thin paint like coating of 0.001 – 0.003 inch thick. • Examples • Epoxy • Hydroxyl polyester (urethane) • Acrylic Urethane

  6. Process

  7. References • http://www.azinc.com/images/DSCF0037.gif • http://www.finishing.com/Library/pennisi/powder.html • http://www.nordson-finishing-eu.com/images/Manspray.jpg\ • http://www.cszindustrial.com/images/powdercoating.jpg • http://www.itwgema.com/images/easysystemunit.gif • Users Guide to Powder Coating, 4th Edition, Editor Nicholas Liberto

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