What is Expanded Polystyrene (EPS)?

 Polystyrene is one of the most widely used kinds of plastic. It is a polymer made from the monomer styrene, a liquid hydrocarbon that is commercially manufactured from petroleum by the chemical industry.

The beads of resin are subjected to steam, which causes the thermoplastic polystyrene to soften and expand up to 40 times its original volume. Each small bead of polystyrene is fully sealed.

Once conditioned by ageing, the EPS beads are blown into a mould, and steam is used in the forming process. The EPS product is then dried and finished by a number of processes, such as hot wire cutting or lamination.