Perfluoroether seals and seals
Perfluoroether seals are high-performance sealing components made from perfluoroether rubber (FFKM) through molding and other processes. With their unique molecular structure, they achieve reliable sealing under working conditions and are commonly used to block gas, liquid, and other medium leaks. The following provides a detailed introduction from three aspects: core characteristics, common types, and typical applications:
Core Features
Wide temperature resistance rangeIt can work stably at high temperatures of 280-300 ° C for a long time, and can withstand temperatures above 320 ° C in the short term. Some special formula products can even cope with high temperatures of 350-400 ° C; At the same time, it has good low temperature resistance. The conventional model can adapt to low temperatures of -39 ° C. Customized formulas such as FFKM9010 can work normally in an environment of -40 ° C. Some special models can withstand low temperatures up to -70 ° C and maintain elasticity and sealing function in both high and low temperature environments.
Corrosion resistance
The carbon hydrogen bond in the molecule is replaced by a carbon fluorine bond, which is a single bond in organic chemistry. This allows it to withstand more than 1600 chemical media, such as concentrated nitric acid, fuming sulfuric acid, and other highly corrosive substances, as well as organic solvents such as ketones and ethers, which are difficult to damage. Swelling only occurs in fluorinated solvents.
Adapt to special and stringent requirementsHas excellent anti plasma performance and can maintain structural integrity under high-energy plasma bombardment in semiconductor dry etching and other processes; Moreover, it has high cleanliness and no precipitation, meeting the strict requirements for environmental purity in industries such as semiconductors and pharmaceuticals. At the same time, it has low gas permeability, ensuring sealing reliability in ultra-high purity systems or vacuum environments.
-
Common types of seals
Perfluoroether seals are processed into various forms according to different working conditions. Among them, perfluoroether O-rings are widely used and can adapt to various standard and non-standard sizes, meeting various industry standards such as national and American standards, and can meet most general sealing scenarios; In addition, there are sealing gaskets used for valve seats and stem packing, diaphragms suitable for instruments and equipment, sealing gaskets suitable for pipelines and equipment connections, and some are also processed into special structural sealing components such as overflow seals suitable for high-pressure equipment.
Typical application areas
semiconductor industryIt is the core sealing material for equipment such as plasma etching machines and diffusion furnaces, which can resist strong corrosive gases and plasma in the process, prevent sealing materials from releasing gas and contaminating wafers, and ensure chip yield.
Aerospace and automotive fieldsUsed for aviation engine fuel systems and spacecraft propulsion systems, capable of withstanding media such as liquid oxygen and liquid hydrogen, as well as high and low temperature changes; In new energy vehicles, the sealing of hydrogen fuel cell stacks and lithium battery electrolyte delivery equipment is adapted to resist corrosion from special media.
Chemical and pharmaceutical industryApplied to sealing chemical reaction vessels, pump valves, pharmaceutical fermentation tanks, high-temperature sterilization equipment, etc., it can withstand corrosive media such as strong acids and alkalis, and comply with clean standards such as FDA and GMP, avoiding contamination of drugs or chemical products
Application case:
