Material plastic HIPS is a thermoplastic material made from elastomeric modified polystyrene. Made of rubber and continuous polystyrene phase two phase system, has developed into important polymer products in the world, the universal product in impact performance and machining performance has a very wide range, has the widespread application, such as used in automobiles, instruments, electric products, furniture, household appliances, telecommunications, electronics, computer, disposable supplies, medicine, packaging and entertainment market.