PEI due to its excellent thermal and electrical properties, creep resistance, resistance to hydrolysis, dimensional stability than aluminum alloy insulation, high temperature resistance (can be a long time in the high temperature of 150 ° C continued to work), good dimensional stability and other advantages. It is now widely used in aerospace, electronics and electrical appliances, medical, automotive transportation and other fields. In addition, PEI in the Internet devices on the application of great potential; if the glass fiber reinforced PEI modification has a better tensile strength and rigidity, then increase the glass fiber PEI will also be widely used in the food industry parts.
At present, PEI applications are mainly in the following three areas:
(1) automobiles, automotive lighting and other transportation products with PEI
The world's major automotive companies have PEI manufacturing parts as an important development direction. In Europe and the United States, the countries of the automobile manufacturers are striving to use PEI parts as much as their own vehicle leading mark, Volkswagen, FAW, Honda Motor Co. have to use PEI. the United States, Europe, Japan and other developed countries have invested a lot of manpower and resources, the implementation of a number of large-scale joint research and development programs to study the manufacture of automotive parts with PEI. These research and development programs to promote the development of PEI applications in the car. At present, PEI die-casting automobile parts at least has more than 90 kinds, for example, has been used to promote the rapid promotion of parts and components are high temperature connectors, high power lamps, lights, control the external temperature of the automobile cabin sensors, control of air and fuel mixtures sensors. Among them, the installation of airbags in the car have begun to switch to PEI connectors, which can withstand high temperatures, the quality of the tough can reduce the vibration in the event of an accidental impact, PEI is not easy to deform and should not be crushed, is conducive to ensuring the safety of automotive parts.
(2) electronic components and home appliances with PEI
The automotive industry on the large demand for PEI, PEI production technology to promote a number of breakthroughs in the use of PEI cost has also dropped significantly, thus promoting the development of PEI in the computer, communications, home appliances, medical, light industry and other industrial applications. Among them, the fastest growing PEI application is in the electronic information industry. Electronic information industry due to the development of digital technology, the market for electronic and communication products, a high degree of integration, thin and light, miniaturization and in line with environmental requirements are increasingly high.
Engineering plastics can be used as the main material to replace bulky metals. For example, PEI has excellent thin-wall casting performance, its die casting wall thickness up to 11.5mm, and maintain a certain degree of strength, stiffness and anti-collision ability, which is very conducive to the product of ultra-thin, ultra-light and miniaturization requirements. This is engineering plastics, even aluminum alloy can not be reached. Under the requirements of thin-walled, miniature, anti-drop and impact resistance, coupled with insulation, heat dissipation, flame retardant and environmental considerations, PEI has become the best choice for manufacturers. In addition, PEI shell can make the product more luxurious and beautiful, which is also incomparable to aluminum alloy. PEI products in the electronic information and instrumentation industry unit weight and size of the temperature produced by the automotive parts, it is in demand for a large number of large coverage, its dosage is also huge. Therefore, in recent years, PEI consumption in the electronic information industry has increased dramatically, becoming another important factor in pulling the increase in global PEI consumption.
(3) other applications
If the glass fiber increased PEI can enhance its mechanical properties, one of the ways to effectively prevent corrosion of PEI products, anti-aging, widely used in the industrial sector device production. At present, as PEI annual market demand, and the annual growth rate of 20%.
The rise of functional materials
PEI profiles, tubes, mainly used in aerospace and other cutting-edge or defense sector. Lightweight is an important direction to improve the combat performance of weapons and equipment. PEI has the lightweight characteristics of PEI is the production of spacecraft, military aircraft, missiles, high mobility combat vehicles, ships, essential structural materials, therefore, vigorously develop the PEI application of the enclosure is the need for modernization of national defense. In addition to the advantages of light weight, PEI also has many functional characteristics are developed and utilized: PEI can be flame retardant, used as automotive, electronic and electrical components have a significant protective effect; PEI material lamps and lanterns or electronic system heat sinks have good thermal performance, long service life; PEI insulation performance is good for computers, communication equipment, can be anti-static, reduce the hazards of static electricity on the human body. Therefore, PEI and PEI as a functional material has a wide range of application prospects, scholars at home and abroad in this field of preliminary exploration and research.