EPS is an Expandable Polystyrene containing pentane as a blowing agent, produced from solid beads of Polystyrene. Expansion is achieved by small amounts of pentane gas as a blowing agent dissolved into the Polystyrene base material during production. The gas expands under the action of heat, applied as steam, to form perfectly closed cells of EPS. These cells occupy up to 30-50 times the volume of the original polystyrene bead. The EPS beads are then moulded into appropriate forms suited to their application.
