What is PEEK?

Polymers are mainly used in three major categories of materials: plastics, rubber and fibers. Milk bottles, lunch boxes, tires, carpets, sweaters, etc. in daily households are all incarnations of polymers. Does this make you feel a lot closer? ? But there are still some high-end applications that we don't pay much attention to on a daily basis, which are related to the national economy and people's livelihood and national defense security, such as aerospace, rail transit, energy industry, automobile industry, medical industry, military defense, electronic communication and other important fields. The performance requirements of materials are usually relatively high, and only high-performance polymers can meet the requirements, and PEEK is one of them.

Ⅰ. Introduction of PEEK

PEEK is a semi-crystalline, thermoplastic aromatic polymer material. Because the molecular chain contains a large number of benzene rings, it has excellent rigidity, heat resistance, natural flame retardancy, and aging resistance (this is very similar to PPS to some extent). At the same time, the two ether bonds and carbonyl groups provide flexibility and excellent manufacturability to the material, which can be used as high temperature resistant structural materials and electrical insulating materials, and can be compounded with glass fibers or carbon fibers to prepare reinforcing materials. Therefore, PEEK is widely used in many fields such as electronic and electrical, aerospace, automobile, energy and other industries, medical and so on.

PEEK is the material with the most excellent comprehensive properties among high-performance polymers, and is the "all-around champion" in the field of new polymer materials. PEEK is a semi-crystalline polymer material with a saturated crystallinity of 35%. One of the most prominent properties of PEEK is the wear resistance brought by the crystal. It can be seen that the crystallinity has a great influence on the performance and application of PEEK, and it is an important indicator that we should pay attention to in the processing process.

Ⅱ. The characteristics of PEEK

1. The peek material is resistant to corrosion and aging.

2. The peek material has high resistance to dissolution.

3. The peek material has the conditions of high temperature, high frequency and high voltage electrical properties.

4. The peek material has strong flexibility and rigidity.

5. The peek material has more precise requirements for the size.

6. The peek material is relatively wear-resistant and has strong anti-corrosion properties.

PEEK resin was first used in the aerospace field, replacing aluminum and other metal materials to manufacture various aircraft parts in the automotive industry because PEEK resin has good friction resistance and mechanical properties.

As a raw material for the manufacture of engine inner covers, various components such as bearings, gaskets, seals, clutch gear rings, etc., are widely used in automobile transmission, braking and air conditioning systems.

PEEK resin is an ideal electrical insulator. It can still maintain good electrical insulation performance under harsh working conditions such as high temperature, high pressure and high humidity. Therefore, the field of electronic information has gradually become the second largest application field of PEEK resin.

Manufacture of pipes, valves and pumps that transport ultrapure water. In the semiconductor industry, it is often used to manufacture wafer carriers, electronic insulating diaphragms and various connecting devices.

Ⅲ. PEEK is used in the medical industry

PEEK has the advantages of non-toxicity, excellent biocompatibility, light weight and corrosion resistance. It is a potential bioprosthesis material. In addition to the use of PEEK for surgeries, dental equipment and some tight medical equipment that require high sterilization and need to be used multiple times, the most important use is to replace the artificial bone built by metal, and organically combined with the body, it is the closest to human bone. s material.

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