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Process of Plastic Dip Coating:

1. Part CleaningParts to be coated should be chemically cleaned to remove contaminants . This results in superior primer adhesion as well as improved corrosion resistance. 2. Part PrimingIf adhesion to the part is desired, application of a primer is required on all sections were polymer coating will be applied. The primed part is flash dried and baked to set the primer and ready the part for the hot dipping operation. 3. Part DippingThe primed part, hot from the primer conversion bake, is immersed in the liquid plastic polymer. All hot parts of the product immersed in the liquid polymer will coat upon withdrawal from the bath with a layer of semi-fused plastic. The amount deposited will depend on the length of time the part was immersed, the metal temperature that the part was immersed at, and the general formulation of the plastic compound used. The higher the metal temperature, the longer the immersion time, and the greater the film thickness. 4. Fusion (Curing) plastic polymerThe part covered with the semi-fused polymer is baked to a temperature between 300°F and 350°F, depending upon the specific plastic compound formula. This completes the fusion of the coating, and adhesion to the product. 5. Cooling the Coated PartWhen the hot part coated with fused polymer comes out of the oven, it is very sensitive to surface marring. The part is cooled down in a tank of circulating cool water to a maximum of 120°F before handling. 6. Complete end productThe finished coated product is then removed from the conveyors and readied for packing and shipment.

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