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Powder coating-2
Powder coating is a finishing process where pigmented resin powder is applied to a product through electrostatic spraying, then cured in an oven. It produces a smooth, durable coating that is highly resistant to corrosion, solvents, chips and scratches. Powder coating offers superior appearance and mechanical properties compared to liquid coatings, with 95-98% material usage and no need for solvents, mixing or recovery systems. The process involves two main types of powder - thermoplastic which re-melts, and thermoset which chemically cross-links during curing to form a thin, non-remelting coating.
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Overview of powder coating technology and its application process with electrostatic pigment particles.
Offers superior appearance, durability, mechanical and corrosion resistance without the need for solvents.
Comparison highlights powder coating's higher material usage efficiency and reduced waste compared to liquid finishes.
Distinguishes between thermoplastic and thermoset powders, detailing their properties and applications.
An overview of the powder coating application process, though the specific details are not provided.
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Powder coating-2
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- 2. Powder coating isa 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. What is it:
- 3. What does PowderCoating 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)
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