What product is typically created using rotational moulding?

Rotational moulding, also known as rotomoulding, is a manufacturing process commonly used to create hollow plastic products. The process involves heating plastic powder in a hollow mould that rotates along two perpendicular axes. As the mould rotates, the powder melts and adheres to the interior surface of the mould, forming a uniform layer. Once cooled, the mould is opened, and the finished product is removed.

In this context, plastic footballs are typically produced using rotational moulding because the process allows for the creation of large, hollow objects with a seamless design. This is ideal for items like footballs which require a robust, lightweight, and durable structure. The ability to create complex shapes with varying wall thicknesses makes rotational moulding particularly suitable for sports equipment.

While the other options might encompass various plastic manufacturing techniques, they do not align with the specific characteristics and capabilities of rotational moulding. Plastic sheets are generally produced through processes like extrusion or vacuum forming, while compartments for holding sweets could potentially be made through injection moulding. Welding rods do not require the hollow structure that rotational moulding provides and are typically manufactured through different methods that ensure the rod's uniformity and strength. Thus, the production of plastic footballs stands out as the correct association with