How Plastic Coating Is Done
Plastic coating is everywhere in our daily lives, from tool handles and wire storage racks to car parts and safety equipment. Typically used for dip coating metal, plastic coating is versatile and effective protection. If you've wondered how plastic coatings are applied to produce the durable, colorful coatings we rely on, read on.
What Is Plastic Coating and Why Do It?
In brief, plastic coating means applying a layer of liquefied plastic to an object by dipping or molding. Plastic coatings offer numerous benefits including improved safety, enhanced durability, better strength, reduced noise and vibrations, and protection from damage, abrasion, electrical current, impacts, corrosion, oxidation, and other environmental hazards.
Steps in Plastic Coating
The most common technique for plastic dip coating is the hot dip method, resulting in coatings from about 1/16" to 1/4" thick. Steps include:
- Prepare the plastic coating material—typically vinyl/PVC-based plastisol, which is a liquid at room temperature. Additives for improved strength, UV-tolerance, fire retardancy, and other qualities can be included, and it can be pigmented to meet color and finishing requirements.
- Preheat parts to be coated. Hotter temperatures result in thicker coatings.
- Dip or submerge parts in the liquid plastisol one or more times to achieve the desired coat thickness.
- Heat-cure parts in the curing oven around 350°F to complete the plastisol dip coating process.
The cold dip process is quite similar. Producing thinner coats, this technique is used to provide the benefits of plastisol coatings to products which can't withstand the preheating needed for hot dip coating. For the cold pvc dip coating process, parts are dipped in the liquid plastisol then briefly heated in the curing oven.
For parts with hollow areas or complex geometries, slush and rotational molding techniques enable plastisol coatings to be applied to an even broader array of parts.
At Precision Dip Coating, we offer expertise in all types of plastic coating techniques and materials, supported by our full suite of design, prototyping, finishing, and other value-added services. Contact us today for affordable, high-quality solutions for your coating projects.
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