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The difference between perfluoroether rubber rollers and fluorine rubber rollers

Release time:

2025-01-23 16:15

The difference between perfluoroether rubber rollers and fluorine rubber rollers lies mainly in the different materials used for the rubber covering. Due to the difference in covering materials, their performance varies, leading to different industrial application scenarios. Why is there such a big difference even though both are fluorine rubber? Below, we will briefly understand the differences between the two materials.

Fluorine rubber is a synthetic rubber that contains fluorine atoms in its molecular structure. It is a special rubber that is resistant to high temperatures, oils, and chemical corrosion. There are many varieties, usually indicated by the number of fluorine atoms in the copolymer, for example: Fluorine rubber 23 is a copolymer of vinylidene fluoride and trifluoroethylene, Fluorine rubber 246 is a copolymer of vinylidene fluoride, tetrafluoroethylene, and hexafluoropropylene, and Fluorine rubber 26 is a copolymer of vinylidene fluoride and hexafluoropropylene, etc. Applications: Fluorine rubber is essential in aviation, aerospace, automotive, petroleum, petrochemical, and industrial pollution control, mainly used to manufacture gaskets, sealing rings, and other sealing components that are resistant to high temperatures, oils, and chemical corrosion.

Perfluoroether rubber, abbreviated as FFKM, DuPont brand Kalrez, has excellent low-temperature performance, high fluorine content, and excellent solvent resistance; it has a stable structure against high temperatures and chemical agents, capable of resisting corrosion from over 1600 types of chemicals. Its outstanding practicality contributes to maintaining the integrity and safety of seals. This remarkable practical value gives it a wide range of special applications in industry. Its development and application represent the pinnacle of fluorine rubber development.

From the perspective of users, the biggest difference between fluorine rubber and other rubbers lies in their better temperature and solvent resistance. It can be used in many scenarios operating in solvent environments, such as coating and cleaning processes. Of course, the choice must also consider the type of solvent to match the type of rubber roller. For example, when using ethyl acetate or butanone solvents, ordinary fluorine rubber is not suitable, and perfluoro rubber must be used. When some rubber properties cannot meet the requirements of two solvents simultaneously, the user must use different types of rubber rollers for different solvents.

From the above, it can be seen that perfluoroether rubber has almost become the ideal material for solvent resistance, while also having temperature resistance that other rubbers cannot match. However, in actual enterprise production, very few people use perfluoroether rubber to make rubber rollers. Why is that? The reason is simple: the cost of perfluoroether rubber is still very high. The market price for 1 kilogram of perfluoroether rubber is currently over 22,000. Taking a typical small roller as an example, with a diameter of 100mm, a length of 1000mm, and a covering thickness of 5mm, using ethylene propylene diene monomer (EPDM) would cost around 1000. If perfluoroether rubber is used for the covering, the raw material cost alone would be nearly 70,000. Additionally, there are costs associated with the risk of failure. For larger rollers, the usage cost of a single roller can reach several hundred thousand. If a production line has several rollers, controlling costs becomes very difficult, which is a significant reason why users choose to give up.

Therefore, the biggest difference between perfluoroether rubber rollers and fluorine rubber rollers should be in terms of price. During the production process, practitioners will adopt different technical solutions for replacement, unless a non-perfluoroether rubber roller is absolutely necessary. I believe that with the continuous development of technology, we will soon be able to use affordable perfluoroether rubber rollers to address the solvent resistance issues in civilian industrial production.

Printing mixed rubber, printing rubber roller, mixed rubber manufacturer

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