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Questions and answers about rubber sealing materials
Fluororubber and nitrile materials are
What's the difference?
A: fluororubber and nitrile rubber are common materials in rubber sealing. NBR is widely used in hydraulic and pneumatic seal because of its good compatibility with petroleum based hydraulic oil, good stability and low price as sealing material. Fluororubber is the best sealing rubber in synthetic rubber at present. The primary key of carbon atom of fluororubber is replaced by fluorine atom, and its molecular structure is stable. It has good heat resistance and chemical stability. Therefore, it is widely used in high temperature and special medium occasions.
What is rubber material elongation?
A: elongation is the reciprocal index of material rigidity, which is expressed by the percentage of the ratio of the material's tensile amount to the length in the natural state. The allowable elongation of material refers to the maximum elongation before permanent damage or permanent deformation.
What is the permeability of rubber?
Answer: it refers to the permeability of gas to materials. In pneumatic seal and vacuum seal, attention should be paid to this performance of materials.
What is the difference between FPM and FKM?
Answer: FPM is the abbreviation of fluororubber in ISO 1629, and FKM is the abbreviation of fluororubber in ASTM 1418. FPM and FKM refer to the same fluororubber. Different writing methods are due to different spelling of European English and American English.
What are the types of materials for woven fillers?
A: there are many kinds of weaving materials, which are divided into four categories: natural fiber, mineral fiber, synthetic fiber, ceramic and metal fiber.
What are the types of materials for woven fillers?
A: flexible graphite.
Source: network (content for reference only)
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