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Everyone knows that FKM sealing material refers to fluoroelastomer, so what does FFKM mean? What does it mean to have an F? Haisheng Rubber tells you that FFKM is perfluoroether rubber, which is the main material of seal rings or rubber products made of perfluoro seal rubber. It is a sealing material that is much higher than ordinary FKM fluorine rubber in terms of material application and price. It can be said that it is not a grade of product texture. The material of the perfluoro rubber seal ring is resistant to high temperature environments and corrosion-resistant occasions. More than 1600 kinds of chemical corrosion) is very excellent.
The material of FFKM perfluoroether rubber seal ring is composed of TFE (main chain), PMVE (branch chain) and bridging part. It not only has excellent high temperature and chemical resistance like PTFE, but also has the elasticity of rubber. , The working temperature range of ordinary perfluoro rubber seal ring is between -25 ℃ ~ + 240 ℃.
The compressive deformation rate of FFKM perfluoroether rubber sealing ring material at 300 ° C is only less than 50%. High temperature resistance can reach 327 ° C. Even when exposed to a constant temperature of 316 ° C or intermittent high temperature environment such as 343 ° C, hardening and embrittlement leading to seal failure will not occur. Immersion directly with aggressive fluids It can still maintain its elasticity and resilience during contact.
In the field of application, the perfluororubber sealing ring also has excellent air tightness, high cleanliness, and ion resistance. These characteristics are also widely used in the semiconductor industry.
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