are three primary resins used in thermoplastic powders, vinyls, nylons
and polyesters. These materials are used for some food contact applications,
playground equipment, shopping carts, hospital shelving and other applications.
Few of the thermoplastics have the broad range of appearance properties,
performance properties and stability that are required in applications
that use thermoset powders.
Thermoplastic powders are typically high molecular weight materials that
require high temperature to melt and flow. They are commonly applied by
fluidized bed application and the parts are both pre-heated and post-heated.
Most of the thermoplastic powder coatings have marginal adhesion properties
so that the substrate must be blasted and primed prior to application.
Polyvinyl Chloride (PVC)
Polyvinyl chloride powder coatings provide good durability, chemical and
water resistance and they can be formulated for FDA approved applications
such as frozen food shelving and dishwasher baskets.
The finish is
somewhat soft, glossy and flexible. It has good resistance to water and
detergent at high temperatures for long periods of time.
Polyethylene produces soft and waxy films. Polypropylene powder has much
in common with the plastic surface of solid polypropylene.
Like most thermoplastic powders, they are durable and resistant to many
chemicals and detergents. Some solvents and detergents can break them
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adhesion problems caps and
cleaning cure ovens
vs. liquid racking
booth spray gun substrates
of powder troubleshooting