With the progress of science and technology and the improvement of people's living standards, the traditional plastic manufacturing industry is experiencing a deep reform. Lead the revolution strength comes from a kind of advanced polymer materials -- Engineering plastics. The emergence of engineering plastics to plastics manufacturing industry has brought more high performance products and wider application.

Plastic products in accordance with the order of increasing performance and price, can be divided into general plastics, general and special engineering plastics three categories, and presents the Pyramid shaped distribution. General plastic properties located in Pyramid at the bottom of the single, relatively cheap, but also in our daily life is the most common. General plastics includes five species, namely polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS) and acrylonitrile - butadiene - styrene copolymer (ABS). While the general engineering plastics is located in central Pyramid and top and special engineering plastics has more excellent performance and higher economic value added, has a huge market potential. General engineering plastics include polycarbonate (PC), polyamide (PA), Polyoxymethylene (POM), polybutylene terephthalate (PBT) and polyphenylene ether (PPO); special engineering plastic comprises polyphenylene sulfide (PPS), liquid crystal polymer (LCP), polysulfone (PSF), polyimide (PI), poly aryl ether ketone (PEEK) and poly aryl ester (PAR) etc..

Compared to the common plastics, engineering plastics has great improvement in performance, such as high mechanical strength, rigidity, good dimensional stability, good heat resistance, excellent electrical insulation etc.. Therefore, engineering plastics is a kind of can be used as structure materials and subjected to mechanical stress, used in a wide temperature range and relatively harsh chemical and physical environment of plastic materials. Application of engineering plastics in the automotive industry is reflected in the excellent properties, good example. First of all, the use of engineering plastics can reduce the friction between the auto transmission parts, wear, improve sealing performance, make the car in safety, obtain greater breakthrough in comfort and fuel efficiency etc.. Secondly, the engineering plastics with the characteristic of light weight, strong plasticity, low manufacturing cost, greatly improves the car's components integration and internal and external design space, while reducing the vehicle weight and manufacturing cost. Not only the application of engineering plastics in automobile bumpers, instrument panels, door trim, also be the main material of key parts of engine air pipe, solar term door body, intercooler in. As of 2011, the domestic engineering plastics demand downstream from the 14% automobile manufacturing industry, and the proportion of Europe and the United States has close to 50%. Engineering plastics in twenty-first Century has become the best choice of materials of automobile industry. Similarly, engineering plastics are also widely used in aerospace, electronic and electrical, automotive, petrochemical, defense industry and other fields.

At present, the domestic engineering plastics industry is in a rapid development period. After the "eleven five" period become the strongest chemical industry economic growth point, engineering plastics as a strategic emerging industry once again been included in the new materials industry in the "Twelfth Five Year Plan". Last year, the domestic engineering plastics consumption reached 2737000 tons, grow 11.8% compared to the same period, the growth rate of the world's fastest demand. Is expected in the next 10 years engineering plastics demand will still increase by 8% a year to the speed of 11%. Although the rapid development of engineering plastics, the domestic annual output still can not meet the downstream demand. For example, in 2010 the national polycarbonate consumption is about 1100000 tons, of which 970000 tons of imports, self-sufficiency rate is less than 12%. "Twelfth Five Year Plan" clearly pointed out, to 2015 the market of domestic engineering plastics to meet the rate will strive to exceed 50%.

In the development of engineering plastics industry and import substitution process, master the core technology of enterprises will be able to fully benefit from technical barriers and high value added products substantial rewards, and engineering plastics industry together to achieve sustained and rapid growth.