Patent ID: 6214421
Filing Date: 2001-04-10
Classification: B05D

Abstract:
A method of coating an exterior surface of a non-conductive object with a heat curable powder, the method comprising the steps of:cleaning the exterior surface of the non-conductive object to clean the exterior surface;pretreating the exterior surface of the non-conductive object by spraying a sufficient quantity of moisture, at a relative humidity of not less than 100%, to the cleaned exterior surface of the non-conductive object, without formation of any water droplets on the cleaned exterior surface, to facilitate adhesion of powder thereto;spraying a polymer coating powder onto the exterior surface of the non-conductive object following completion of applying a sufficient quantity of moisture to the exterior surface of the non-conductive object but prior to complete evaporation of the applied moisture from the exterior surface of the non-conductive object;evaporating remaining moisture on the exterior surface of the non-conductive object prior to commencing curing of the non-conductive object; andcuring the polymer coating powder to the exterior surface of the non-conductive object, once all remaining moisture on the non-conductive object is evaporated, without decomposing the polymer coating powder.