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Powder Coating Process Comparison

Characteristic Electrostatic Fluidised Bed Flame Spraying
of Workpiece Spraying
Size larger smaller not limited
Material metallic, must be any, not necessary any, not necessary
conductive conductive conductive
Temperature relatively high high not relevant
Resistance high low, not suitable for low, not suitable for
Aesthetic Value decorative purposes decorative purposes

Coating Thinner films Thick high-build films Thick high-build
Thickness with excellent films; uniformity
uniformity dependent on the
operator
Type of Thermoplasts and Thermoplastic and Thermoplasts only
Coatings thermosets thermosets

Color Change Difficult Relatively difficult Easy
Capital Moderate to high Low Very low
Investments
Labor Low since highly Moderate depending Relatively high
automated on the
automatization
Energy Only post-heating Preheating and often Low, no preheating
Consumption postheating and postheating

Coating Waste Very little Very little Dependent on the
workpiece geometry
Sources: Loctite and Handbook of Plastics Joining
Advantages of Thermoplastic coatings:
Provides aesthetics to product
Wide colour options
Provides good adhesion to substrate
Abuse and abrasion resistant
Corrosion resistance
Beat paints in life cycle cost analysis
Cost effective to paints
Unlimited shelf life
Eliminate expensive clean up
UV and chemical resistance

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