Polystyrene is one of the petrochemical products widely used in various industries, which is obtained by polymerization of styrene monomer. Foaming polystyrene (EPS) is a type of this polymer characterized by an increase in volume when exposed to heat. This ability to expand is due to the uniform distribution of a hydrocarbon agent, such as pentane, in the structure of expanded polystyrene. Manufacturers can expand the balls inside molds of different shapes to produce a plastic object of the same shape.