Rotational molding is quite different from other kinds of plastic molding processes. The process from the melting to the shaping and molding is done after the polymer has been placed in the mold.

That said, deciding on the right plastic resin for your roto-molding products is very essential. But there are factors to consider when selecting a plastic resin. One of the most important ones is the application products. You should also consider a plastic resin that can withstand all kinds of conditions the parts are exposed to.

Some applications demand a specialized resin which is quite expensive. But in most applications, affordable polyethylene is a great choice.

Now that we have that out of the way. We’ll walk you through everything you need to know about Plastics Rotational Molding.

Types of Plastic Resin

Plastic resin is used for various products such as plastic bottles, baby bottles, toys, food containers, boats, rotomolded water tanks, caps, and more. In this section, you will learn about different types of plastic resin and their usage.

Nylon, Polyurethane, Polycarbonate (PC), Polystyrene, Polycarbonate, Ethylene Vinyl (EVA), Food Safe Plastic Resin, and Polyethylene Casting Resin are some examples of plastic resin. But our focus will only be on some of these plastics.

Polyethylene Casting Resin

The casting resin creates a transparent plastic which is great for various design elements. It is used by a lot of people to immerse objects in clear casting.

The polyethylene casting resin can be utilized in a lot of design and practical applications. For example, it can be used for encasing photographs, decoration, labels, and other kinds of essential papers.

Polystyrene

Polystyrene can be used for many projects. But it is primarily used in insulated products. Home insulation, food containers, surfboards, and protective packages for mobile phones are some of the insulated products that polystyrene is used for.

Polypropylene

The next plastic resin on the list is quite common. Polypropylene is great for holding extremely toxic or corrosive materials. It can hold toxins without causing disintegration.

Besides, polypropylene is highly resistant to the weather.

Polyvinyl Chloride (PVC)

Polyvinyl chloride produces plastic that has a unique finish. Not just that, it is very easy to paint the plastic.  You can easily find PVC in plumbing tubes and other materials that require a moisture-resistant material.

However, polyvinyl chloride is not as flexible as other plastic resins like polyethylene. It is likely to crack or snap. But it is a great choice for settings more durable.

Ethylene Vinyl Acetate (EVA)

The plastic resin is a combination of vinyl acetate and ethylene. EVA is quite softer compared to other plastic resin and that makes it great for the production of products that requires flexibility. It is also great for producing smaller objects that do not need the resin to be stretched.

Food Safe Plastic Resin

The food-safe plastic resin is great for making containers used by the food and beverage industry. First off, the rotomolded plastic is lightweight and that makes it easy to move around. Also, it is resistant to leakage and spoiling and protects against pest infestation.

Polycarbonate (PC)

Polycarbonate is a see-through amorphous thermoplastic material. Although it comes in varieties of colors, it enables the internal transmission of light in the same capacity as glass.

It is used for the production of varieties of materials and is used because of its resistance to impact and heat. Polycarbonate can also be combined with other flame retardant materials without suffering degradation.

PC is used to make protective gear, such as plastic lenses in eyewears, digital disks, automotive components, and many more.