Over 100 years has passed since the appearance of the first plastic polymer. Today, plastics production has grown into a large capacitcy industry with high added-value. The invention of new plastic polymers tends to decrease, however, a variety of new grades derived through modification based on commodity and engineering plastics continue to emerge on the market. Engineering plastics are always referred to as the advanced materials of tomorrow. They are hopefully to replace more traditional materials including metals. Meanwhile, the development of plastic compounding technology has resulted in the production of various high performance plastic alloys, blends, and fiber-reinforced materials which meet the requirements of modem industrial applications.