There are many advantages to roto-molding products. This has to do with both the stress free process as well as the Polyethylene material commonly used. Besides being durable and extremely long lasting, they are often lighter weight than many other materials. Rotomolded products can be exposed to the elements and used outside without deterioration. Playground equipment is often rotomolded because of this feature. Polyethylene can be exposed to caustic chemicals without deterioration. Many chemical tanks are rotomolded. FDA requirements for food grade products can be met by the rotational molding process and these products are often seen in the food industry.
There is no limit to where rotationally molded products can be used. A growing trend in manufacturing is to convert products made of less reliable materials into polyethylene through rotational molding. Shipping pallets, agricultural tanks, drainage piping, laundry carts, department of defense items, air cargo containers, burial urns and cemetery products and even tornado shelters are some examples of roto-molded conversions.
Lining metal tanks or parts with polyethylene to extend the lifespan of the metal is also a growing trend. Polyethylene can be coated on the inside of a part through rotomolding adding durability and chemical resistance to an otherwise limited material.
Rotational molding is a process that extends to many industries and applies to parts both large and small.