Powder coating is increasingly accepted as thepreferredfinishingprocessfor the future for manyapplications.Increasinglystringentenvironmentalregulations,rising costsin allareas, anddemands by consumersfor betterquality andmoredurableproducts areamong the challenges facingtoday'sfinisher.Powdercoatingprovides asolution to these challenges andothers.
Powdercoating is the techniqueofapplyingstaticallycharged dry paint to apart which is then heated inanoven tomelt andcurethe paint. Thefinal cured coating is the same asa2-packwet paint.The powderedpaint is normally applied by using apowderfeedsystem andgun toelectrostatically charge and spray the powderontothepart. Forsomeuses, such aspipes, the part being coated isdippedinto afluidisedbedof powder. The partis then placed in a curingoven.Duringthecuringprocess a chemicalcross-linking reaction istriggeredand itisthischemical reaction whichgives the powder coatingmanyofitsdesirableproperties.
Powder Coating gives adry,clean,durablecoating.Itis environmentally friendly. Unlike liquidfinishingweresolventsareused, powder coatings do not releaseVolatileOrganicCompoundsintotheatmosphere. Unlike wet spraying, in manycasesthe oversprayedpowdercan be recycled for re-use.
Powdercoating can produce muchthickercoatingthanconventionalliquidcoatings without running orsagging.Additionallya widerange ofeffectsare easily accomplished whichwould beimpossibleto achievewithothercoating processes.
