First of all, it has a very high temperature resistance, its glass transition temperature is as high as 143 ℃, the melting point of 334 ℃ or so, can be used in 250 ℃ for a long time, the short-term use of the temperature can even reach more than 300 ℃. PEEK shows high strength, high modulus characteristics. Its tensile strength can reach more than 100MPa, bending strength and modulus is also quite excellent.
At the same time, it also has good toughness and impact resistance, this flexible and rigid characteristics of PEEK materials are not easy to fracture when subjected to complex stress, to meet a variety of harsh working conditions under the use of the requirements of the PEEK to most of the chemical reagents have excellent resistance, including organic solvents, acids and alkalis, etc. Whether in highly corrosive chemical environments, PEEK can be used in a wide range of applications.
Whether in a highly corrosive chemical environment or in complex industrial media, PEEK materials can maintain their own performance is not affected. Its low coefficient of friction and abrasion resistance make it effective in the manufacture of bearings, gears and other moving parts to reduce wear and prolong the service life; flame retardant so that in the electronic and electrical appliances and other fire requirements of the field has a unique advantage; and the electrical insulation properties of the electronic components to meet the stringent requirements of the insulating material.
Main classifications of PEEK (by properties and processing methods)
1.High temperature PEEK
This is the most common type of PEEK and has excellent thermal stability, maintaining good mechanical properties and chemical stability at high temperatures. High-temperature PEEK is commonly used in the manufacture of high-temperature resistant parts such as engine components, nozzles, valves and
seals.
2.Carbon fiber reinforced PEEK
The mechanical properties and stiffness of PEEK are enhanced by adding carbon fibers to it. This reinforced PEEK has higher strength, stiffness and wear resistance and is used in a wide range of aerospace and motorsports applications, such as aircraft components, body structures and racing car parts.
3.Conductive PEEK
The conductive properties of PEEK are imparted by the addition of conductive fillers such as nanotubes or metal powders. This electrically conductive PEEK is used in electrostatic protection, electromagnetic shielding and sensor applications.
4.Medical Grade PEEK
Specially treated and purified to meet the requirements of medical devices. Medical grade PEEK is biocompatible, corrosion resistant, and antimicrobial, and is commonly used in the manufacture of implantable medical devices, surgical instruments, and dental products.
5.Film grade PEEK
Ultra-thin PEEK films prepared by a special process, typically used in microelectronics and optics. Thin-film PEEK is characterized by high-temperature stability, insulating properties and mechanical strength, and is suitable for the manufacture of electronic displays, solar cells and optical films.
Wide range of applications for PEEK materials
(A) Aerospace field in the aerospace field, reduce weight and improve performance is the eternal pursuit, PEEK materials because of its high strength, high temperature resistance and low density characteristics, is widely used in aircraft engine parts, wing structure parts, satellite parts, etc. In the hot end of the aircraft engine parts, PEEK materials can withstand high temperature gas washout and complex mechanical stress, instead of traditional metal materials, effectively reduce engine weight and improve fuel efficiency. In the hot end of the aircraft engine components, PEEK materials can withstand high-temperature gas scouring and complex mechanical stress, replacing the traditional metal materials, effectively reducing engine weight and improve fuel efficiency.
(B) medical field PEEK materials in the medical field has a broad application prospect. It has good biocompatibility, will not cause the body's immune response, so it can be used for the manufacture of artificial joints, spinal implants, dental repair materials. Compared with traditional metal implant materials, PEEK materials have a lower modulus of elasticity, closer to the mechanical properties of human bones, can reduce the stress shielding effect, promote the growth and healing of bone tissue, and has the following characteristics.
Lightweight Low density (approx. 1.3 g/cm3).
Low modulus of elasticity Proximity to bone, cushioning occlusal impact, protection of opposing teeth and implants;
Good mechanical properties Combination of excellent strength and toughness, wear-resistant and self-lubricating, creep-resistant, fatigue-resistant;
Convenient imaging Transmissible X-ray/CT/MRI, no metal artifacts, no need to remove the restoration during imaging;
Stable physical and chemical properties Resistant to irradiation/oxidation, ethylene oxide, high temperature and humidity;
Weakly hydrophobic, not easy to color;
Reliable biocompatibility No cytotoxicity, no sensitization, no metallic odor in the mouth;
May reduce the risk of peri-implantitis;
Convenient Clinical Repair When infection or other reasons lead to repair without the need to break the crown to redo, only need to be in situ drilling treatment after decorative porcelain closed.
(C) the field of electronic and electrical appliances with the electronic and electrical products continue to miniaturization, high-performance direction, the application of PEEK materials is becoming more and more widespread. In the manufacture of electronic components, PEEK can be used as an insulating material for circuit boards, chip packaging and so on. Its good high temperature resistance and electrical insulation properties can ensure the stable operation of electronic components in high temperature, high voltage and other complex environments. At the same time, PEEK materials can also be used in the manufacture of electronic equipment shells, connectors and other components, its flame retardant and mechanical properties to meet the safety and reliability requirements of electrical and electronic products.
(D) the automotive industry in the automotive industry to lightweight, electrification trend, PEEK materials have become an important application of one of the materials. In the new energy automobile motor, PEEK materials can be used to manufacture enameled wire materials to improve the motor's high temperature resistance and insulation properties. In addition, PEEK can also be used to manufacture seals for lithium batteries to ensure the sealing and safety of batteries in complex working conditions. In the automobile transmission system, PEEK materials manufactured bearings, gears and other components to reduce weight, reduce friction loss, improve fuel economy and power performance of the car.
(E) industrial manufacturing field in the field of industrial manufacturing, PEEK materials are widely used in a variety of harsh working conditions in the manufacture of mechanical parts. For example, in chemical pumps, valves and other equipment, PEEK material corrosion and wear resistance makes it an ideal material choice.
