Painting and Coating of Plastics Aleaha Rice Erica Mongera Vince Gallo Penn State Behrend

Purpose Decoration Decoration Match Between Adjacent Plastic and Non Plastic Match Between Adjacent Plastic and Non Plastic Functionality Functionality

Outline Introduction Introduction Background & Theory Background & Theory Preparation Preparation Types of Paints Types of Paints Techniques Techniques Examples Examples Conclusion Conclusion

Introduction Successful Painting Successful Painting Properties of the Substrate Properties of the Substrate Properties of the Paint or Coating Properties of the Paint or Coating Application Process Application Process End Use Application and Environment End Use Application and Environment

Theory & Background Advantages of Coating Advantages of Coating Abrasion Resistance Abrasion Resistance Chemical Resistance Chemical Resistance Covers Surface Imperfections Covers Surface Imperfections Uniformity of Finish Uniformity of Finish High or Low Glosses High or Low Glosses Variety of Colors Variety of Colors

Theory & Background (cont) Disadvantages of Coating Disadvantages of Coating Limited to Size of Part Limited to Size of Part Fire Hazards Fire Hazards Pollution Pollution

Theory & Background (cont) Advantages of Painting Advantages of Painting Smooth Finish Smooth Finish Durability Durability Protective Coating Protective Coating Variety of Colors Variety of Colors

Theory & Background (cont) Disadvantages of Painting Disadvantages of Painting Variety of Plastics Variety of Plastics Air Pollution (Solvent Based) Air Pollution (Solvent Based) Waste (Spray) Waste (Spray)

Preparation Detergent Cleaning Detergent Cleaning Removes Salts and Oils Removes Salts and Oils Lint-Free Gloves Lint-Free Gloves Destaticizing Air Blow-Off Destaticizing Air Blow-Off Painting Operation Inside “Clean Room” Painting Operation Inside “Clean Room”

Types of Paints Multi-component Multi-component Solvent-Based Solvent-Based Powder Coats Powder Coats Soft Paints Soft Paints

Types of Paints (cont) Multi-component Multi-component Epoxy Paint Systems Epoxy Paint Systems Strong Adhesion Strong Adhesion High Temperature Resistance High Temperature Resistance Good Chemical Resistance Good Chemical Resistance Volatile Environment Volatile Environment Polyurethanes Polyurethanes Automobile Applications Automobile Applications Robust and Flexible Robust and Flexible

Types of Paints (cont) Multicomponent Multicomponent Enamels Enamels High Gloss Surface High Gloss Surface Waterborne Waterborne Conversion from Solvent to Water Conversion from Solvent to Water Less Durable Less Durable

Types of Paints (cont) Multicomponent Multicomponent Acrylic Acrylic Water Soluble Water Soluble Quick Drying Quick Drying Environmentally Safe Environmentally Safe Latex Latex Alternative to oil or solvent based paints Alternative to oil or solvent based paints Stretch Stretch

Types of Paints (cont) Solvent Based Solvent Based Majority for Metal and Non-plastic Substrate Majority for Metal and Non-plastic Substrate Environmental Concerns Environmental Concerns Smoothest, Most Uniform Coating Smoothest, Most Uniform Coating Greatest Color Control Greatest Color Control Can be Applied by Brushing, Dipping, Spray Can be Applied by Brushing, Dipping, Spray

Types of Paints (cont) Soft Paints Soft Paints Softer Feel Softer Feel Automobile and Furniture Industries Automobile and Furniture Industries Added Thickness Added Thickness Blend of Flexibility and Toughness Blend of Flexibility and Toughness

Types of Coatings Powder Coats Powder Coats No Solvents No Solvents Limited Number of Systems Limited Number of Systems Overspray Overspray Non Toxic Non Toxic Extremely Tough & Durable Extremely Tough & Durable Protective Barrier Protective Barrier Furniture Industry Furniture Industry

Types of Coatings (cont) Conformal Coatings Conformal Coatings Functionality Rather than Decoration Functionality Rather than Decoration Circuit Boards Circuit Boards Temperature, Dust, Humidity Extremes Temperature, Dust, Humidity Extremes Acrylic, Polyurethane, Epoxy, Silicone Acrylic, Polyurethane, Epoxy, Silicone

Techniques Spray Spray Electrostatic Electrostatic Silk-Screening Silk-Screening Dip Coating Dip Coating Flow Coating Flow Coating

Techniques (cont) Spray Spray Reduces Paint to Droplets Reduces Paint to Droplets Not Foreign Matter Not Foreign Matter Air is the Propellant Air is the Propellant Airless Painting Airless Painting The Nozzle Tends to Wear Faster in Gun The Nozzle Tends to Wear Faster in Gun Creates Tails in Pattern Creates Tails in Pattern

Techniques (cont) Electrostatic Electrostatic Air or Airless Air or Airless Charged Particles Charged Particles Overspray and Waste Overspray and Waste Plated or Metallized Plated or Metallized

Techniques (cont) Silk-Screening Silk-Screening High Quality Print Images High Quality Print Images Eliminates the Need for Backup Tooling Eliminates the Need for Backup Tooling Well Ventilated - Solvent Based Paints Well Ventilated - Solvent Based Paints Not Recommended on Textured Surfaces Not Recommended on Textured Surfaces

Techniques (cont) Dip Coating Dip Coating Paint Bath Paint Bath Low Cost Low Cost Cleaning and Preparation Cleaning and Preparation Little Waste Little Waste

Techniques (cont) Flow Coating Flow Coating Opposite of Dip Coating Opposite of Dip Coating Poured Over Substrate Poured Over Substrate Little Waste Little Waste Low Cost Equipment Low Cost Equipment Proper Cleaning & Preparation is Required Proper Cleaning & Preparation is Required

Examples Spray Paint Spray Paint Motorcycle Part Motorcycle Part

Examples (cont) Conformal Coating Conformal Coating Electrical Circuit Board Electrical Circuit Board

Examples (cont) Silk-Screening Silk-Screening

Examples (cont) Dip Coating Dip Coating

Conclusion Preparation Preparation Air Pollution Concern Air Pollution Concern Endless Capabilities Endless Capabilities