With the progress of science and technology and the continuous improvement of people's living standard, the traditional plastic manufacturing industry is witnessing a change in the further. Leading this change power comes from a kind of advanced polymer materials, engineering plastics. The emergence of engineering plastics for plastic manufacturing industry has brought the higher performance products and wider application fields.

With the progress of science and technology and the continuous improvement of people's living standard, the traditional plastic manufacturing industry is witnessing a change in the further. Leading this change power comes from a kind of advanced polymer materials engineering plastics. The emergence of engineering plastics for plastic manufacturing industry has brought the higher performance products and wider application fields.

Plastic products in accordance with the order of the performance and price increase, can be divided into general plastics, engineering plastics and special engineering plastics three categories, and presents pyramid distribution. General performance of the single plastic in the bottom of the pyramid, relatively cheap, also is the most common in our daily life. General plastic contains five varieties: polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS) and acrylonitrile - butadiene - styrene copolymer (ABS). And is located at the top of the pyramid in central and general engineering plastics and special engineering plastics with superior performance and higher economic value added, has huge market potential. General engineering plastics polycarbonate (PC), polyamide (PA), polyformaldehyde (POM), poly (butyl glycol terephthalate (PBT) and polyphenylene oxide (PPO); Special engineering plastics, including polyphenylene sulfide (PPS), liquid crystal polymer (LCP) and polysulfone (PSF), polyimide (PI), poly (aryl ether ketone (PEEK) and aromatic esters (PAR), etc.

Compared with general plastics, engineering plastics in performance is greatly improved, such as high mechanical strength, good rigidity, dimensional stability, good heat resistance, excellent electrical insulation, etc. Therefore, engineering plastics is a kind of can be used as structural materials and mechanical stress, in a wider temperature range and the rigid plastic material used in the chemical and physical environment. The application of engineering plastics in the automotive industry is reflect its excellent performance is very good example. First of all, using engineering plastics can reduce the friction between the auto transmission parts, increase the wear resistance, improve the sealing, make cars in safety, comfort and fuel efficiency gain greater breakthrough. Second, engineering plastics, with its light weight, high plasticity, low manufacturing cost, raise the auto parts integration and design, both internal and external space, at the same time reduce the weight and the manufacturing cost of the vehicle.

Engineering plastics applications not only in car bumper, dashboard panel, door trim, also become the engine air pipeline, throttle valve, and other key parts of the main materials. By 2012, 14% of the domestic engineering plastics downstream demand from the automobile manufacturing industry, and the European and American countries the rate is close to 50%. Engineering plastics has become a 21st century auto industry one of the best materials selection. Likewise, the engineering plastics in the aerospace, electrical and electronic, automobile, petrochemical industry, national defense and other fields have a wide range of application.

At present, the domestic engineering plastic industry is in rapid development period. Following is the most strong chemical industry during the 11th five-year economic growth point, engineering plastics as a strategic emerging industry is in a new material industry five-year development plan. Domestic engineering plastics consumption last year totaled 2.737 million tons, up 11.8% from a year earlier, the fastest growth in global demand. Is expected in the next 10 years the demand of engineering plastics will still rising at an annual rate of 8% to 11%. Although developing rapidly, the domestic engineering plastics production capacity still far cannot satisfy the needs of downstream. In 2010, for instance, the consumption of polycarbonate is about 1.1 million tons, 970000 tons of imports, it consumes less than 12%. The 12th five-year plan is made clear that by 2015 domestic engineering plastics market meet rate will strive for more than 50%.

In the development of engineering plastics industry and the process of import substitution, master the core technology of enterprises will be able to fully benefit from technical barriers and high value-added products to bring considerable returns, with engineering plastic industry and realize the sustained and rapid growth.