FFKM

1，Materials and characteristics

FFKM, short for perfluoroether rubber, is like an enhanced version of FKM.

In terms of material structure, almost all hydrogen atoms in its molecules are replaced by fluorine atoms, and the main chain also contains ether bonds. This structure makes it extremely robust.

In terms of properties, it’s even better than ordinary fluororubber: it can work long-term in high-temperature environments above 300°C, and can even withstand 320°C for a short time. It has strong stability against chemical corrosion from strong acids, alkalis, and oxidants. What’s more, it has very low air permeability and top-notch airtightness. It hardly fails even in high-purity or extreme pressure environments. However, its cost is not low, and it’s much more expensive than ordinary fluororubber.

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2.Application fields

Because of its outstanding performance, FFKM is mainly used in places where ordinary materials can’t hold up. For example, in the semiconductor industry, during chip manufacturing, it’s relied on for sealing components in high-purity gas delivery and high-temperature etching equipment to prevent pollution and resist corrosion. In chemical and pharmaceutical industries, it’s used to seal equipment like pumps, valves, and reactors that handle strong acids, organic solvents, and high-temperature reactions. It keeps things stable and prevents leaks. In aerospace and military sectors, it’s a must for seals in engines—like rocket engines—and missile fuel systems. These need to withstand fuel corrosion and extreme temperature differences, and FFKM gets the job done. In the energy field, it’s essential for sealing critical equipment such as high-temperature, high-pressure devices in deep-sea drilling and nuclear power plants. Simply put, the harsher the environment, the more FFKM is needed.