Engineering resins are plastic materials that have better mechanical and/or thermal properties than commodity plastics(PS,PVC,PE,PP, etc). Some types of engineering plastics have replaced metal and wood in many applications(eg. electrical and electronic, automobile, construction, machinery, and aerospace,etc.). Engineering plastics can be modified with various reinforced agents and additives to achieve high rigidity, low creep, remarkable mechanical strength, excellent heat resistance, and superior electrical insulation. Processing engineering plastics is very challenging.Some materials require a high degree of dispersion and distribution of fillers at high loading rates. Some materials are very sensitive to overheating and hydrolytic degradation. Thus selecting the right machine and optimizing equipment configuration becomes the top priority.