Cases

Superiorities of PEEK Gears Compared with Traditional Gears In the field of mechanical transmission, PEEK gears demonstrate remarkable superiorities over traditional gears in multiple aspects. Firstly, in terms of weight. PEEK materials have a relatively low density, and the gears made of PEEK are significantly lighter than traditional metal gears, such as steel gears. This lightweight characteristic is of great significance for some equipment that is sensitive to weight. For example, in the auxiliary transmission systems of aircraft in the aerospace field, the use of PEEK gears can effectively reduce the overall weight, lower fuel consumption, and improve flight efficiency and range. When it comes to wear resistance, PEEK gears perform excellently. They can maintain a good surface condition under long-term and high-load operating conditions, with minimal wear. Compared with traditional gears, their service life is greatly extended. In the equipment with frequent start-stop and high-speed operation on industrial automation production lines, PEEK gears can reduce the replacement frequency, lower the equipment maintenance cost, and improve the continuity and stability of production. Chemical stability is also a major advantage of PEEK gears. They have strong tolerance to a variety of chemical substances. Whether in the chemical environment with the risk of acid and alkali corrosion or in the equipment related to the marine environment where it is humid and there may be various chemical erosion media, PEEK gears can work stably, while traditional metal gears may face problems such as rusting and corrosion, leading to performance degradation or even failure. In addition, PEEK gears have good self-lubricating properties. In some precision instruments that are difficult to be lubricated externally or in food processing machinery where oil pollution is not allowed, PEEK gears can achieve smooth transmission without the need for an additional lubrication system, reducing the risk of failures caused by improper lubrication and also reducing the pollution to the working environment. Moreover, the vibration and noise reduction performance of PEEK gears is better than that of traditional gears. When operating at high speeds, they can effectively reduce the generation of vibration and noise. This has a positive effect on improving the working environment, enhancing the comfort of equipment operation, and reducing the interference to surrounding equipment and personnel. It is especially suitable for the transmission systems of indoor office equipment and medical equipment where noise requirements are strict.

The lightweight characteristics of PEEK materials make it the first choice for humanoid robots The lightweight characteristics of PEEK materials make it the top choice for humanoid robots. In the current global boom of humanoid robot manufacturing, the choice of materials has become one of the crucial factors determining the performance of robots. And PEEK materials stand out with their outstanding lightweight properties and have become the preferred materials for humanoid robots.   PEEK materials possess remarkable low-density features. Compared with traditional metal materials like steel, their weight is significantly reduced. This is of great significance for humanoid robots. The lighter weight can significantly reduce the energy consumption during the operation of robots, thereby extending their battery life or reducing the frequency of energy replenishment, which greatly improves the working efficiency and ease of use of robots. For example, in some scenarios that require continuous operation for a long time, such as the assisting operation robots on industrial production lines or service robots providing all-day services in shopping malls, hotels and other places, the lightweight advantage of PEEK materials can ensure the stable operation of robots without frequent stops for charging or maintenance. Meanwhile, the lightweight PEEK materials do not sacrifice their strength and rigidity. They can provide sufficient support and stability for the mechanical structures of humanoid robots, ensuring that key parts such as joints and frames will not be easily deformed or damaged during the execution of various complex movements and tasks by robots. This is highly compatible with the need of humanoid robots to simulate the flexible and diverse movements of humans, such as walking, grasping, and carrying. Moreover, the good processing properties of PEEK materials can also meet the manufacturing requirements of the complex and precise parts of humanoid robots, enabling the appearance design and internal structure layout of robots to be more optimized and compact. It can be said that the lightweight characteristics of PEEK materials have triggered a material innovation in the field of humanoid robots and have vigorously promoted the development of humanoid robots in a more efficient, intelligent and flexible direction, opening a new chapter in the development of robot technology.

The difference between adding fiberglass PEEK and pure PEEK is surprisingly significant! Pure PEEK raw materials are generally brownish gray in color, also known as PEEK-1000. They are generally made from pure polyetheretherketone resin, which has the best toughness, excellent performance, and impact resistance among PEEK grades. PEEK-1000 can be disinfected using the most convenient disinfection methods (steam, drying heat, ethanol, and Y-rays), and the raw material composition for manufacturing PEEK-1000 complies with the EU and US FDA regulations on food hardness. These characteristics make it suitable for widespread use in medical, pharmaceutical, and food processing industries. PEEK with added fiberglass has a darker color and appears coffee colored, especially the reinforced plastic PEEK-GF30 filled with 30% fiberglass, which has better rigidity and creep resistance, as well as better dimensional stability. It is more suitable for manufacturing structural parts and is an ideal material for manufacturing industrial processing components. PEEK has excellent comprehensive performance, but its glass transition temperature is significantly lower than that of high-temperature resistant amorphous plastics. However, the addition of glass fibers precisely makes up for this deficiency. Strengthening PEEK composite materials can compensate for or enhance the shortcomings of PEEK performance, improve its heat resistance and bending resistance, improve its processing performance, reduce costs, enhance corrosion resistance, etc., and achieve comprehensive performance better than single component PEEK raw materials. At the same time, PEEK without any antioxidant added will undergo degradation and cross-linking of its own molecular chains with the extension of insulation time in the molten state, resulting in an increase in polymer viscosity and a decrease in some properties, seriously affecting the processing performance and product stability of PEEK. Therefore, high-temperature resistant antioxidants need to be added to the formula to avoid the degradation and cross-linking of molecular chains at high temperatures.    

Gain knowledge! PEEK Polyether Ether Ketone Product Introduction Polyether ether ketone (PEEK), also known as polyetheretherketone in Chinese. PEEK is a partially crystalline material with a glass transition temperature of 143 ℃ and a melting temperature of 334 ℃. The material is resistant to organic and water environments and is widely used in bearings, pistons, water pumps, compressor valve plates, cable insulation, etc. PEEK is a high-performance specialty engineering plastic developed by Imperial Chemical Industries (ICI) in 1978. Similar products have also been developed by companies such as DuPont, BASF, Mitsui Toho Chemicals, VICTREX, and Caltex in the United States. Among them, ICI's PEEK has been transferred to VICTREX for production. In China, due to its excellent performance, PEEK is regarded as a strategic defense and military material, and its research has been included in the national key scientific and technological research projects and the "863 Program" from the Seventh Five Year Plan to the Fifteenth Five Year Plan. The main production and research manufacturers include Suwei from the United States and Da Ying Chuang High Performance Polymer Company. Dongguan PRES focuses on the production, research and development, and sales of PEEK materials. This material has excellent chemical resistance, thermal stability, and oxidation resistance, as well as good mechanical strength, creep resistance, and electrical properties. It can withstand high-energy radiation and has good flame retardant properties. The long-term working temperature range of PEEK can be from -100 ℃ to+250 ℃. Excellent chemical resistance ● High temperature and low temperature resistance ● Not easily worn and wear-resistant Continuous exposure to hot water or steam is not affected PRES Polyether Ether Ketone (PEEK) resin is a special engineering plastic with excellent performance. Compared with other special engineering plastics, it has many significant advantages, such as high temperature resistance, excellent mechanical properties, good self-lubricating properties, chemical corrosion resistance, flame retardancy, peel resistance, radiation resistance, insulation stability, hydrolysis resistance, and easy processing. It has been widely used in aerospace, automotive manufacturing, electronic and electrical, medical, and food processing fields. PEEK resin, with excellent performance and wide application, was first applied in the aerospace field, replacing aluminum and other metal materials to manufacture various aircraft components. Due to the excellent friction resistance and mechanical properties of PEEK resin in the automotive industry, it is widely used as a raw material for manufacturing engine covers. Various components such as bearings, gaskets, seals, clutch rings, etc. made from PEEK resin are widely used in the transmission, braking, and air conditioning systems of automobiles. PEEK polyetheretherketone resin is an ideal electrical insulator that can maintain good electrical insulation performance under harsh working conditions such as high temperature, high pressure, and high humidity. Therefore, the electronic information field has gradually become the second largest application area of PEEK resin, manufacturing pipelines, valves, and pumps for transporting ultrapure water. In the semiconductor industry, it is commonly used to manufacture wafer carriers, electronic insulation membranes, and various connecting devices. As a semi crystalline engineering plastic, PEEK is insoluble in almost all solvents except concentrated sulfuric acid, and is therefore commonly used to make compressor valve plates, piston rings, seals, and various chemical pump bodies and valve components. PEEK resin can also withstand up to 3000 cycles of high-pressure sterilization at 134 ℃, which makes it suitable for producing surgical and dental equipment with high sterilization requirements and repeated use. PEEK not only has the advantages of light weight, non toxicity, and corrosion resistance, but also is currently the closest material to human bones, which can be organically combined with the body. Therefore, using PEEK resin instead of metal to manufacture human bones is another important application in the medical field. The rapid development of domestic production of PEEK resin was developed by the former British ICI company in the late 1970s. Since its inception, it has been regarded as an important strategic defense and military material, and many countries have restricted its export. Regarding PRES: PRES is a company that mainly produces special engineering plastics such as PEEK polyetheretherketone, PPS polyphenylene sulfide, PEI polyetherimide, PPSU polyphenylsulfone, and is also one of the largest producers in Guangdong Province. Products such as PEEK particles, plates, and bar profiles are mainly used in special high-end application fields such as electronic applications, high-performance aviation, automotive parts, and petrochemicals.

There are many conductive plastics that can replace metal materials. Do you know which ones are PEEK conductive plastics? Peek polyetheretherketone is a special engineering plastic with excellent properties such as high temperature resistance, self-lubricating, easy processing, and high mechanical strength. It can be manufactured and processed into various mechanical components, such as automotive gears, oil screens, and shift starting discs; PEEK conductive plastic is a special engineering plastic with excellent performance, which has many significant advantages compared to other special engineering plastics, such as aircraft engine components, automatic washing machine wheels, medical equipment components, etc, High temperature resistance, excellent mechanical properties, good self-lubricating properties, chemical corrosion resistance, flame retardancy, peel resistance, radiation resistance, and stable insulation. Do you know the performance of PEEK conductive plastic? PEEK conductive plastic has been widely used in the aerospace industry, replacing aluminum and other metal materials to manufacture various aircraft components. In the automotive industry, PEEK resin has good friction resistance and mechanical properties, and is used as a raw material for manufacturing engine covers. The bearings, gaskets, seals, clutch rings, and other components made from it are widely used in automotive transmission, braking, and air conditioning systems. PEEK resin is an ideal electrical insulator that can maintain good electrical insulation performance under harsh working conditions such as high temperature, high pressure, and high humidity. Therefore, the electronic information field has gradually become the second largest application area of PEEK resin, manufacturing pipelines, valves, and pumps for transporting ultrapure water. In the semiconductor industry, it is commonly used to manufacture wafer carriers, electronic insulation membranes, and various connecting devices. As a semi crystalline engineering plastic, PEEK is insoluble in almost all solvents except concentrated sulfuric acid, and is therefore commonly used to make compressor valve plates, piston rings, seals, and various chemical pump bodies and valve components.   PEEK resin can also withstand up to 3000 cycles of high-pressure sterilization at 134 ℃, which makes it suitable for producing surgical and dental equipment with high sterilization requirements and repeated use. The molding temperature of PEEK is 320 ° C~390 ° C, the drying temperature is 160~1855H~8H, and the mold temperature is 140~180 ° C. The molding temperature of this material is too high, which can cause serious damage to the screw. When setting the screw speed, the speed should not be too fast, and the injection pressure should be between 100~130MPa. The injection speed should be between 40~80. After the molding is completed, the screw should be quickly cleaned with PE wax in a timely manner to prevent PEEK material from staying in the screw. PRES PEEK conductive plastic has the following solutions: PEEK-cf30 injection molding reinforcement grade. Mixed granular material, reinforced with 30% carbon fiber, has good rigidity and load-bearing performance, can reach 315 ℃ at temperatures above 250 ℃, UL94V-0, good toughness, high strength, good chemical corrosion resistance, and fast molding cycle. PEEK-cf30 reinforced with 30% carbon fiber has good high temperature resistance, rigidity, and strength, suitable for engineering products with good chemical resistance such as machinery, electrical, automotive, and chemical industries. PEEK-cf40 injection molding and extrusion grade, 40% carbon fiber reinforcement, high rigidity, high temperature resistance, used for engineering components.   PEEK-CF15 is a mixture of PTFE 15 and carbon fiber reinforcement, with good flowability and heat resistance. It can be used continuously at a temperature of 250 ℃, with a maximum temperature of over 300 ℃. Suitable for high-quality thin-walled engineering products in mechanical, electrical, and other fields. PEEK-cf15 graphite injection reinforced grade, carbon fiber reinforced, high temperature resistance, good rigidity and strength, suitable for mechanical, electrical, chemical, automotive and other industries with good lubrication properties. PEEK-cf20 PTFE 10 injection reinforced grade, 20% carbon fiber reinforced, high temperature resistance, good rigidity and strength, suitable for anti-static products such as machinery, electrical, automotive, chemical, etc.   About PRES: PRES is a company that mainly produces special engineering plastics such as PEEK polyetheretherketone, PPS polyphenylene sulfide, PEI polyetherimide, PPSU polyphenylsulfone, and is also one of the largest producers in Guangdong Province. Products such as PEEK particles, plates, and bar profiles are mainly used in special high-end application fields such as electronic applications, high-performance aviation, automotive parts, and petrochemicals.

Special engineering plastics! What is modified plastic? Modified plastics refer to the addition of small molecule inorganic or organic substances to polymers (resins), which impart certain properties (mechanical processing properties) or improve certain properties through physical or chemical reactions.   Technologies and products of modified plastics Modified plastic main product - inorganic powder filled modified plastic China's inorganic powder filled modified plastics are in a leading position internationally in terms of production, variety, processing technology, and basic theory. Common inorganic powders include calcium carbonate, talc, kaolin, precipitated barium sulfate, wollastonite, brucite, tremolite, mica, and calcium oxide. According to relevant statistics, the total amount of inorganic powder used for filling modified plastics in China each year reaches 7-10 million tons, of which more than 70% is calcium carbonate (heavy calcium, light calcium), followed by talc powder.   The greatest function of inorganic powder filled modified plastics is to save petroleum resources. China's petroleum resources cannot meet the needs of rapid economic development, and a large amount of petroleum and resin need to be imported every year. Only the five major general-purpose resins (PE, PP, PVC, PS, ABS) have an annual import volume of over 24 million tons. The price of inorganic powder is less than 1/20 of the price of general resin, and for plastic products, raw material costs account for nearly 70% of the total cost. For plastic product manufacturing enterprises, reducing raw material costs without affecting the appearance and performance of the products not only increases the economic benefits of the enterprise, but also enhances market competitiveness. Inorganic powder filled modified plastics also play an important role in controlling white pollution and environmental protection. Experimental results have shown that for packaging materials and tableware that are not easily recyclable, under the conditions of ensuring performance and hygiene, when the filling amount of inorganic powder (especially calcium carbonate) reaches 30% or more, they are more easily digested by nature after disposal. If used as an energy recovery product with high filling capacity, it is easy to burn, has a high heat recovery rate, and is less likely to cause secondary pollution. Inorganic powder filled modified plastics are not simply used to reduce resin usage, save oil resources, lower raw material costs, and minimize environmental pollution. More importantly, they can endow or improve certain functions of the material, which is irreplaceable by other methods. 1、 The most representative ones are as follows: (1) Talc. Filling into resin can increase the rigidity of the material and is widely used in PE and PP pipes, which can improve the ring stiffness of the pipe and increase its compressive strength. (2) Kaolin. Plastic is generally made of calcined kaolin, which can improve the insulation and block infrared radiation of the material. It is widely used in cables, greenhouse films, and plastic films to improve the insulation of cables and increase the temperature inside and on the ground. (3) Inorganic powders with needle like structures, such as wollastonite, tremolite powder (also known as composite needle like powder), and certain crystal whiskers. The masterbatch produced by increasing material strength and toughness is usually referred to as reinforced or reinforcing masterbatch. (4) Mica. It can significantly improve the rigidity, heat resistance, and electrical insulation of the product. Its increased rigidity is better than talc powder, and its insulation is better than kaolin. (5) Magnesium hydrate. It is a cheap natural inorganic flame retardant, which is increasingly favored when the use of halogen series, especially decabromodiphenyl ether, is restricted. The higher the purity of brucite, the smaller the particle size, and the better the flame retardancy. In addition to flame retardancy, brucite also has smoke reducing properties. (6) Precipitation of barium sulfate. Prepared by chemical methods, the purity can reach 99%, the whiteness can reach over 98%, the particle size is generally above 10000 mesh, the particle size distribution is narrow, the particles are relatively regular and round, and the chemical and heat resistance is good. In recent years, studies have found that the oil absorption value of precipitated barium sulfate is much smaller than other inorganic powders, only about 16, making it difficult to agglomerate and easy to disperse. Filling it into plastics has little effect on its mechanical properties and can significantly increase the brightness of the product. The brightening effect is better than ordinary brightening agents, with long-term no overflow. When filled into building drainage pipes, it can increase the density of the pipes and have good sound insulation effect. (7) Natural zeolite. It has strong adsorption ability, can remove the odor of the product, and has little impact on the strength of the product. As a deodorizing masterbatch applied in recycled materials, it has a good effect. 2、 Modified plastic processing equipment   The basic principle of modified plastics, whether it is filling modification, blending modification or reinforcement modification, is to break the interface boundaries of materials with different properties with the help of additives through mechanical methods, and mix them into a uniform body. The more evenly mixed, the tighter the interface bonding, and the better the material's performance. The performance of processing machinery plays a very important role in the performance and strength of modified plastics. Driven by the rapid development of modified plastics, in order to meet the market demand for modified plastics, China's plastic machinery processing industry has also achieved rapid development in modified plastic processing equipment in the past 20 years. In the early 1980s, when calcium carbonate filled masterbatch was introduced, there were no twin-screw extruders in China, and only single screw extruders could be used to produce calcium carbonate masterbatch. So far, the level of twin-screw extruders in China has reached the international advanced level, which can not only meet domestic production needs, but also export a large amount every year. In addition to continuously updating and transforming twin-screw extruders to meet the demand for modified plastics, the plastic machining industry has also successfully researched and developed reciprocating single screw extruders and triple screw extruders. For the modification of crash powder filling, the surface activation treatment of the powder directly affects the product quality. At present, enterprises producing filling masterbatch mainly use high-speed mixers for surface activation treatment of inorganic powders. In recent years, enterprises producing high-speed mixers have successfully developed continuous production equipment specifically for surface activation treatment of inorganic powders. In recent years, many enterprises have successfully applied the internal mixer originally used in the rubber industry to the production of filling masterbatch, and have achieved good results. Its advantages are high production efficiency, saving electricity, manpower, and additives, and reducing dust pollution. The specific method is to add all materials together into the internal mixer according to the formula, without heating. The temperature is automatically raised by the pressure and strong shear force of the internal mixer itself, and it is molded for about 12-15 minutes before being pressed into a single screw or twin-screw extruder for granulation. Material mixing and plasticization are completed in the internal mixer, where the single screw or twin-screw only plays a granulation role, so the structure is much simpler than ordinary single screw or twin-screw. Using the internal mixer process to produce filling masterbatch of the same specifications can save costs of 150-180 yuan per ton. According to relevant reports, a new type of granulation equipment similar to the internal mixer process has recently been developed, which uses a dual rotor continuous mixer instead of the internal mixer. The plasticized material is directly fed into the single screw granulation through a dual stage method, and the entire equipment is integrated. 3、 Modified plastic processing aids   Additives are essential raw materials for the production of modified plastics, whether it is filling modification, blending modification, or reinforcement modification, all of which rely on additives. There are many types of additives used in modified plastics, including coupling agents, dispersants, lubricants (internal and external lubrication), plasticizers, compatibilizers, nucleating agents, and fluorescent whitening agents. The development of modified plastics has driven the development of additives. When initially producing calcium carbonate filled masterbatch, there were no coupling agent products on the market, but stearic acid was used instead. Aluminum ester coupling agents were first introduced in 1984 and were quickly promoted due to their low price, light color, non toxicity, good thermal stability, and easy use. The application of aluminum ester coupling agents plays an important role in improving the performance and quality of inorganic powder filled masterbatch. After aluminum ester coupling agents, a series of new coupling agent products with excellent performance, such as silane coupling agents, titanium ester coupling agents, rare earth coupling agents, acid phosphite coupling agents, aluminum/titanium composite coupling agents, and polymer coupling agents, have been developed successively for different modified products. Coupling agents play a crucial role in the performance and quality of inorganic powder filled modified plastics.   With the continuous progress and development of scientific theories, in order to better meet market demand, some multifunctional coupling agents have emerged in recent years, such as reinforcing, toughening, amphiphilic water suppressing, UV resistant, and brightening new coupling agents.   Although there has been significant progress and development in the use of processing aids for modified plastics, there is still a certain distance from practical needs, such as solving the problem of aggregation of nanoscale inorganic powders in plastics. 4、 The development trend of modified plastics   1. General plastic engineering plasticization, despite the continuous increase in new products of engineering plastics and the exploration of application fields, and the continuous reduction of costs due to the expansion of production equipment; However, with the continuous development and maturity of modification equipment and technology, general-purpose thermoplastic resins have become increasingly engineered through modification and have seized some of the application markets of traditional engineering plastics.   2. With the booming development of the domestic automotive, electrical, electronics, communication, and machinery industries, the demand for modified engineering plastics will significantly increase, and various high-strength and heat-resistant engineering plastics will be widely used.   3. Low cost special engineering plastics, such as polyphenylene sulfide (PPS), polyetherimide (PEI), polyimide (PI), polyetheretherketone (PEEK), imide (PAI), polysulfone (PSU), and polyphenylene sulfone (PPSU), have become increasingly important applications in cutting-edge technology fields such as electronics, automotive, aviation, instrumentation, petrochemicals, rockets, and aerospace due to their excellent electrical properties, high temperature resistance, and dimensional stability. Some also have good flame retardancy, radiation resistance, chemical resistance, and mechanical properties.   4. Nanocomposite technology will bring new opportunities for modified plastics, and the manufacturing and application of polymer nanocomposites will be an important topic in the future. Nowadays, the development of nanotechnology is advancing rapidly, and nano polymer materials, as an important branch, are showing new trends in research and development. The potential benefits of nanotechnology drive scientists from many countries to constantly explore and research, and the competition is fierce. For nano polymer materials, due to the small particle size, large surface area and easy agglomeration of nano powder particles, it is difficult to obtain nano structured composites by conventional blending methods when preparing nano powder modified polymer composites. In order to increase the interfacial adhesion between nano additives and polymers and improve the uniform dispersion ability of nano particles, surface modification of nano powders is required. Mainly to reduce the surface energy state of particles, eliminate the surface charge of particles, improve the affinity between nanoparticles and organic phases, and weaken the surface polarity of nanoparticles.   5. Developing new and efficient additives is also an important direction for the development of modified plastics. In addition to commonly used additives in plastic processing such as heat stabilizers, antioxidants, UV absorbers, nucleating agents, antistatic agents, dispersants, and flame retardants, toughening agents, flame retardant enhancers, alloy compatibilizers, and other additives are also crucial for modified plastics.   6. Developing efficient reactive functional intercalation agents to generate nano scale dispersed phases in situ through chemical bonding, thereby connecting the nano dispersed phases to the main chain of polymer molecules through chemical bonding, forming a seamless polymer/layered silicate nanocomposite material. With existing plastic film, sheet, and bottle forming equipment and processes, new plastic packaging products can be efficiently and low-cost manufactured, which can be recycled and reused, recycled and granulated for reuse. It is a new type of high barrier plastic packaging material with green environmental protection concepts.   PRES focuses on the production of special engineering plastic particles, modification production, sheet production, and bar production. The special engineering plastics produced by PRES have good strength and toughness, strong resistance to oxidation and aging, and great value in use. They enhance the hardness, rigidity, compression and wear resistance, and are suitable for processing bars, sheets, profiles, etc., thereby reducing production costs for enterprises.

PEI with good dimensional stability PEI (polyetherimide) is a high-performance engineering plastic that plays an important role in many fields due to its excellent dimensional stability. PEI has low moisture absorption, which allows it to maintain a relatively stable size in different humidity environments. Compared to many other plastics, PEI absorbs very little moisture and does not undergo significant expansion or contraction due to changes in environmental humidity. In fields such as precision instrument manufacturing and electronic equipment that require high dimensional accuracy, this characteristic of PEI is particularly critical. For example, in the manufacturing of electronic component casings, dimensional stability can ensure precise installation and normal operation of the components. Meanwhile, PEI also has a low coefficient of thermal expansion. This means that the size change of PEI is very small when the temperature changes. Whether in high-temperature industrial production environments or outdoor application scenarios with large temperature fluctuations, PEI can reliably maintain its size. For example, in the aerospace field, components need to operate under extreme temperature conditions, and PEI's low thermal expansion coefficient ensures its dimensional stability and guarantees the safety performance of the aircraft. In addition, PEI itself has high strength and rigidity, which also helps it maintain good dimensional stability. PEI is less prone to deformation when subjected to external forces or loads, ensuring the accuracy of its dimensions. In summary, PEI with good dimensional stability is widely used in various fields such as electronics, aerospace, and medical due to its low moisture absorption, low thermal expansion coefficient, and high strength and rigidity, providing reliable material support for the manufacturing of various high-performance products.

PEI's excellent dimensional stability, high temperature resistance, electroplatability, and wave transmission performance make it uniquely advantageous in the field of 5G communication.   1: Optical communication The significant increase in the deployment of 5G base stations and data centers requires a large amount of data transmission to be interconnected through fiber optics, which brings new opportunities to the optical communication market. Due to the fact that optical communication signal transmission mainly occurs in the infrared band, materials are required to have high infrared band transmittance, low loss, as well as good long-term dimensional stability and weather resistance. PEI material is widely used in the field of optical communication, including fiber optic connectors and optical components for optical transceiver modules. PEI material has excellent infrared penetration, with a transmittance of over 88% in the 850nm-1550nm optical communication frequency band. Its high refractive index can remain constant with temperature and humidity changes, and can withstand the harsh double 85 (85 ℃/85% humidity) for up to 2000 hours; Meanwhile, the long-term dimensional stability of PEI material provides reliable optical docking for signal transmission; PEI has high strength and modulus, and is used to replace metal in manufacturing fiber optic connectors, adapters, and other structural components, or to replace glass in manufacturing optical transceiver modules. It can optimize the component structure, simplify its manufacturing and assembly process, while maintaining its size, thereby significantly reducing the cost of the final product. In addition, due to the high dimensional stability and strength characteristics of PEI material, as well as excellent weather resistance, its application in the field of waterproof connectors for fiber optic splitters or base stations can meet the IP67 waterproof requirements, significantly improving the long-term airtightness and reliability of the product.   2: RF connector 5G adopts Massive MIMO technology. Each base station uses 2 to 3 antennas (AAUs), each antenna can have multiple channels. The connection between the antenna board and the RF board, as well as between the antenna feed board and the cavity filter board, is made using board to board connectors. Due to the significant increase in demand for RF connectors in 5G antennas, the traditional use of thermosetting materials (PTFE) and large-scale production through CNC machining has become a constraint in the industry. Radio frequency connector insulators require materials that provide good dielectric properties, low and stable dielectric losses, excellent mechanical properties, excellent dimensional stability for easy assembly, and reliable large-scale production performance. PEI materials can meet application requirements in all aspects and have become the primary choice for radio frequency connector insulator materials. Whether for traditional three-stage board to board connectors or pogo pin designs, PEI materials can meet customer needs, reflecting the advantages of PEI materials over a wide temperature range, including dimensional stability, stable dielectric properties, high mechanical strength, high fusion line strength, and temperature resistance, which are superior to other engineering plastics. PEI provides customers with more stable product performance and reduces costs. In addition to board to board connectors, feeder connectors are replaced with metal shells of DIN connectors, and traditional RF coaxial connector insulators and shells also widely use PEI materials.   3: Filter With the significant increase in the number of 5G antenna channels and the integration of antennas and RRUs into AAUs, there are reports that the weight of 5G antennas will increase by 30% to 80% compared to 4G antennas. How to reduce the weight of 5G antennas has become a topic of concern for major antenna manufacturers and base station equipment suppliers. The plasticization of metal filters has once again become a focus of attention for major equipment manufacturers. The filter cavity requires plastic materials with high heat resistance, and even some antenna manufacturers have proposed to meet the requirements of high-temperature reflow soldering process; Simultaneously, it is required that the material has a linear expansion coefficient that matches the metal and remains constant with increasing temperature; It has excellent electroplating performance to ensure the dimensional accuracy of the cavity and the bonding strength with the surface coating at high and low temperatures, thereby ensuring the stable performance of the filter during operation. Metallized plastic materials can undergo environmental simulation experiments and reliability verification, including high and low temperature cycling, wet heat aging, etc. The material does not deform, the coating does not peel off, and the mechanical properties remain stable. PEI resin material, as an amorphous material with high glass transition temperature, has a linear thermal expansion coefficient similar to that of aluminum alloy, which remains constant with increasing temperature. It has excellent heat resistance and dimensional stability, long-term reliability, low and stable dielectric loss, can be electroplated, and has good metal adhesion. It shows unparalleled advantages in the application of cavity filters compared to other plastic materials, and can achieve weight reduction of up to 30% for 5G cavity filter units; And it can achieve large-scale production through injection molding technology, maintain dimensional accuracy between batches, and reduce production costs. Given the excellent characteristics of PEI, PEI material has been widely used in filter related components such as tuning screws, flying rod bases, fixing screws, etc. in the 3G and 4G era. With the development of 5G technology, product size has decreased, and precision and mechanical performance requirements have become more stringent. The application advantages of PEI are becoming increasingly significant.   4: Phase shifter In China, PEI is also widely used in phase shifters, whether it is the dielectric sheet of the dielectric phase shifter or the PCB bracket in the ring phase shifter, all benefit from the stable size and dielectric properties of PEI material over a wide temperature range, low dielectric loss, high mechanical strength, and excellent resilience. With the gradual commercialization of 5G base stations and the pursuit of further reducing energy consumption and costs, traditional dielectric phase shifters or ring phase shifters will have the opportunity to replace chip phase shifters and be widely used in 5G passive MIMO antennas. In summary, special engineering plastic PEI has a wide range of application prospects in the 5G field due to its unique advantages in heat resistance, dimensional stability, dielectric stability, and metal bonding compared to other engineering plastics.