Jun 10, 2016 0 comment

“Are there commercially viable processes either available or under development which may be used to powder coat phone housings injection molded from Polycarbonate ABS blended plastics? Plastic DTUL @66psi =265F?”

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“Yes. Powder coating has been used on plastics that can withstand at least 250 degrees F. These plastic parts are preheated to at least 225 degrees F to attract the powder coating from electrostatic spray guns. The powder is then cured in an oven at 250 degrees F to provide the desired finish. A “low temperature cure” powder coating is used in this process. Sometimes IR ovens are used to preheat and cure the parts without fully heating the plastic substrate. The newer UV powder technologies are also used on plastic parts. In this case the parts are preheated and coated as previously described. The powder is then melted on the surface to flow the material using either convection or IR ovens (approximately 250 degrees F). Finally the powder is fully cured using UV technologies. Either of these methods can work on plastics or some wood products if they can withstand at least 250 degrees F. “

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