What is fluorine rubber?
Fluorine rubber is a synthetic rubber whose molecular structure containing fluorine atoms, which has excellent heat resistance, oxidation resistance, oil resistance and drug resistance. It is mainly used in aviation, chemical, petroleum, automobile and other industrial sectors as sealing materials, medium resistant materials and insulating materials.
It is usually expressed by the number of fluorine atoms of fluorine-containing units in the copolymer. For example, fluororubber 23 is a copolymer of vinylidene fluoride and chlorotrifluoroethylene.
Fluororubber 23, commonly known as No. 1 rubber in China, is a copolymer of vinylidene fluoride and trifluorochloroethylene.
Fluororubber 26, commonly known as No. 2 rubber in China, DuPont brand Viton A, is a copolymer of vinylidene fluoride and hexafluoropropylene, and its comprehensive performance is better than that of No. 1 rubber.
Fluororubber 246, commonly known as No. 3 rubber in China, DuPont brand Viton B, is a terpolymer of vinylidene fluoride, tetrafluoroethylene and hexafluoropropylene. The fluorine content is higher than 26 rubber, and the solvent resistance is good.
Fluororubber TP, commonly known as tetrapropylene rubber in China, short in FEPM, AGC brand AFLAS, is a copolymer of tetrafluoroethylene and hydrocarbon propylene, with excellent water vapor and alkali resistance.
Vinylidene fluoride rubber, DuPont brand Viton GLT, is a tetrameric copolymer of vinylidene fluoride, tetrafluoroethylene, Perfluoromethyl vinyl ether and vulcanization point monomer, with excellent low-temperature performance.
Perfluoroether rubber, DuPont brand kalrez, excellent low temperature performance, high fluorine content and excellent solvent resistance.
Fluorosilicone rubber, excellent low-temperature performance, with certain solvent resistance fluororubber varieties:
Fluororubber properties
Fluororubber is white or amber translucent sheet-like elastomer, non-toxic, tasteless, non combustible (self extinguishing), with excellent heat resistance, oil resistance, chemical resistance, good physical and mechanical properties and weather resistance, and can be melted in low molecular ketones and lipids.
1. Withstand voltage: ≥ 6.0KV
2. Working temperature: - 60 + 350℃
3. Specific gravity: 2.0
4. Hardness: 50-95 Shore A
5. Tensile strength: ≥ 6.5
6. It has excellent oil resistance, solvent resistance, ozone resistance and corrosion resistance.
Advantages of fluororubber
1. Excellent high temperature resistance: the service temperature range is from - 60 to + 250.
2. Excellent oil resistance: the resistance to high temperature fuel oil, sulfur-containing lubricating oil, hydraulic oil, diester oil, silicate ester and other oils is superior to other rubbers.
3. Excellent resistance to strong corrosive media and strong oxidant; The stability of fuming nitric acid, concentrated sulfuric acid, hydrochloric acid, hydrogen peroxide, concentrated alkali and other strong corrosive media is better than other rubbers.
4. Good mechanical performance, electrical insulation performance and radiation resistance.
5. Good high vacuum resistance.
Application scope of fluororubber
1. When the fluorine rubber is exposed to moisture and water or the temperature rises, the change is small. Even if the silicon dioxide generated by short-circuit combustion is still an insulator, which ensures that the electrical equipment continues to work. Therefore, it is most suitable to make wires, cables and lead wires.
2. The fluororubber tube can be used for the transportation and sealing of various strong acid and alkali, steam, hot air, hot oil and other fluids, and can also be used for household appliances, lighting and medical devices.
3. Fluororubber has outstanding high-temperature and corrosion resistance, and has the reputation of "king of rubber". It can be processed into rubber pipes, tapes, films, gaskets, (skeleton) oil seals, O-rings, v-rings, etc., and is widely used in aviation, automobile, petroleum, chemical industry, telecommunications, instruments and other fields.