What material is PE?

PE is the abbreviation for polyethylene; 20+PE probably refers to steel lined with PE, grade 20#

What was said upstairs is absolutely correct! Lined with polyethylene.

Learned 20+ PE, thanks!

Is PEEK the same as polyether ether ketone? :victory:

PEEK, or Polyether Ether Ketone, is a high-performance specialty engineering plastic that offers numerous advantages over other such plastics. It features heat resistance, excellent mechanical properties, self-lubricating characteristics, resistance to chemical corrosion, flame retardancy, good resistance to peeling, resistance to radiation, stable electrical insulation, resistance to hydrolysis, and ease of processing. It is widely used in industries such as aerospace, automotive manufacturing, electronics and electrical engineering, healthcare, and food processing. With excellent performance and wide range of applications, PEEK resin was first used in the aerospace industry to replace aluminum and other metal materials in the manufacture of various aircraft components. In the automotive industry, due to its excellent friction resistance and mechanical properties, PEEK resin is used as a raw material for manufacturing engine covers. The various components made from it, such as bearings, gaskets, seals, and clutch rings, are widely employed in a vehicle’s transmission, braking, and air conditioning systems. PEEK resin is an ideal electrical insulator; it maintains its excellent electrical insulation properties even under harsh working conditions such as high temperatures, high pressures, and high humidity. As a result, the field of electronic information has gradually become the second largest application area for PEEK resin. It is used to manufacture pipes, valves, and pumps for transporting ultra-pure water. In the semiconductor industry, it is commonly employed to produce wafer carriers, electronic insulating membranes, and various connection components. As a semicrystalline engineering plastic, PEEK is insoluble in almost all solvents except concentrated sulfuric acid; therefore, it is often used to manufacture compressor valve plates, piston rings, seals, as well as various components for chemical pumps and valves. PEEK resin can also withstand up to 3,000 cycles of autoclaving at 134°C, a property that enables its use in manufacturing surgical and dental devices that require high levels of sterilization and can be reused repeatedly. PEEK not only boasts advantages such as light weight, non-toxicity, and corrosion resistance, but it is also the material that is closest to human bone at present; it can integrate organically with the body. Therefore, using PEEK resin to replace metals in the manufacture of human bones represents another important application of this material in the medical field. PEEK resin, which is produced rapidly in China, was developed by the former ICI company in the UK at the end of the 1970s. Since its introduction, it has been regarded as an important strategic material for defense and military applications, and its export is restricted by many countries. You can find a lot of them directly on Baidu. . . .