Polystyrene is indeed derived from petroleum. It is a synthetic polymer made through the polymerization of styrene, a liquid hydrocarbon that is commercially obtained from the refining of petroleum or natural gas. As a widely used plastic, polystyrene plays a significant role in various industries, including packaging, construction, and consumer goods. Its production process relies heavily on fossil fuel resources, which raises concerns about environmental sustainability and the dependence on non-renewable materials. Efforts are being made to explore alternative, more sustainable methods for producing such materials, but currently, the majority of polystyrene is still derived from petroleum-based sources.

EPS is expandable polystyrene which can be used as insulation,decoration or packaging.EPS foam is made by EPS resin and can be made by EPS foam machine.