PS: Polystyrene
Polystyrene is a strong plastic created from erethylene and benzine that can be injected, extruded or blow molded making it a very useful, and versatile manufacturing material. Most of us see Styrofoam is form of foam polystyrene packaging.
Polystyrene is also used as , building material, with electrical appliances (light switches plates), and in other household items. At room temperature, polystyrene is normally a solid thermoplastic, but melted at higher temperature for molding or extrusion, then resolidified.

