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Metallized Finishes

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  1. Metallized Finishes PL ET 370 Travis Hunter Jose Perez Josh Sindlinger

  2. Introduction • Secondary Processes • Cosmetic or Mechanical Enhancement • Excellent EFI & RFI Shielding • Three Basic Processes • Wide Range of Compatible Materials

  3. Presentation Outline • Applications • Processes • Materials • Equipment

  4. Applications • Cosmetic Enhancement – Faucet Handles • Lighting – Reflector Housings • Films • Protect Light Sensitive Foods & Products • Corrosion Resistance

  5. Applications • EMI/RFI Shielding - Electronics • Reflective Coatings - CDs • Adding Electrical Conductivity • Circuit Boards

  6. Processes • Vacuum Metallizing • Plating • Spray/Aerosol Painting

  7. Vacuum Metallizing • Vaporized Metal onto Plastic Substrate • Thin Coatings • Consistent Thickness • Most Popular Method Available

  8. Vacuum MetallizingPROCESS/EQUIPMENT • Part is Cleaned • Surface Prep • Part is Plated • Excess Metal is Spun Off • (optional) • Sealant (if necessary)

  9. Vacuum MetallizingADV/DISASADVANTAGES • Advantages • High Quality Finish • Thin Coating • No Environmental Concerns • Disadvantages • Poor Thermal Protection • Line of Sight

  10. Plating • Electrolytic (Chrome Plating) • Thick Metal Base Coat • Cosmetic Top Coat • Electrical Current Builds Layers • Electroless • Chemical Deposition of Metal • Circuit Boards Traces

  11. Electrolytic Plating PROCESS/EQUIPMENT • Part Ceaning/Prep • Nickel Plating • Aqueous Bath • Copper Plating • Nickel Plating • Chrome Plating (if necessary)

  12. Electroless Plating PROCESS/EQUIPMENT • Part Cleaned & Etched • Catalyst Released onto Part Surface • Electroless Copper Plating • Electroless Nickel Plating • Sealant (if necessary)

  13. PlatingADV/DISASADVANTAGES • Advantages • High Quality finish • Covers Irregular Surfaces • Wear Resistant • Disadvantages • Caustic Chemicals • Very Slow Process

  14. Spray/Aerosol Painting • Parts Coated with Conductive Paint • Little Specialty Equipment Needed • Four Methods • Air Atomization • Airless • Electrostatic Spray Painting • Dipping

  15. Spray/Aerosol Painting PROCESS/EQUIPMENT • Part is Cleaned & Prepped (if necessary) • Surface is Coated with Paint • Coating Baked or Air Dried • Well Ventilated Booth Necessary

  16. Spray/Aerosol PaintingADV/DISASADVANTAGES • Advantages • Good to Excellent Finish • Low Cost • Disadvantages • Poorer Adhesion • Uneven Thickness • Environmental & Health Concerns • Waste/Overspray

  17. Other Processes • Hot Film Stamping • Thermal Spray Coating • Selective Electroless Plating • Direct Metallization • Metallic Conformal Coating • Physical Vapor Deposition

  18. Materials Amorphous Thermoplastics • Higher surface energy • ABS (Most Common) • HIPS, PMMA, and PC Also Common

  19. Materials Semi-Crystalline Thermoplastics and Thermosets • Low Surface Energy and Good Chemical Resistance • Polypropylene • Acetal • Nylon • Most Epoxies and Polyesters

  20. Processing/Design Requirements • Reduce Sharp Corners • Low Residual Stresses • Slow Fill Times • No Gating Onto Area to be Metallized • Avoid Weld Lines • Avoid Release Agents

  21. Additional Requirements • Surface Cleaning & Prep • Need High Surface Energy • Sealant May Be Used • Processes Sensitive to Heat & Moisture