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There 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 down quickly.



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abrasive blasting   adhesion problems  caps and plugs

chemical cleaning  cure ovens  defects  fluidized bed

infrared oven  masking  outgassing  powder formulations

pretreatment  quality    powder selection

powder vs. liquid  racking  spray booth  spray gun  substrates

hi-temp tapes  types of powder  troubleshooting


August 2, 2006