What is the plastic dip-coating process?


Quick Answer

The plastic dip-coating process typically involves cleaning, priming, dipping, fusing and cooling the product. Plastic dip-coating refers to a process wherein a functional, decorative or protective plastic vinyl coating is applied to a metal part of a toy, hand tool, electrical equipment or medical instrument.

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Full Answer

The first step of plastic dip-coating is chemically cleaning the part before coating to remove contaminants. This helps to improve corrosion resistance and enhance premier adhesion.

Next, a primer is applied to the part for adhesion. This is done on all parts where the polymer coating is applied. The part is then flash dried and baked, allowing the primer to set in preparation for the hot dipping operation.

The part is removed from the primer conversion bake while the parts to be coated are still hot and dipped in a liquid plastic polymer. The polymer coats the hot parts of the dipped product when removed from the plastic. The film thickness depends on the metal part’s metal temperature, length of time it was dipped and the type of plastic compound used.

The covered part is baked to complete adhesion and coating of the polymer on the product. The time-frame and temperature of the baking process depends on the plastic compound formula used.

Lastly, the part is placed in a tank of cool, circulating water to cool it down before handling. The coated part is extremely sensitive to surface marring immediately after it leaves the oven.

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