High impact polystyrene, also known as HIPS, is a thermoplastic material made of elastomer modified polystyrene. The two-phase system consisting of rubber phase and continuous polystyrene phase has developed into an important polymer commodity in the world. This general-purpose product has a wide range of impact properties and processing properties, making it widely used, such as in automobile, apparatus, electric products, furniture, household appliances, telecommunications, electronics, computers, disposable goods, medicine, packaging and entertainment markets.