Several sealing material on Q

1 fluorine rubber and nitrile materials What is the difference ?
Answer : Viton and NBR rubber seals are commonly used materials . As for petroleum based hydraulic fluids nitrile better compatibility , as a sealing material has good stability ,metal security seals the price is cheap, so in the hydraulic , pneumatic seal widely used. Viton is the best overall performance synthetic rubber sealing rubber . Carbon atoms, fluorine rubber, a fluorine atom primary key replacement, stable molecular structure . Its heat resistance, good chemical stability. Therefore, in high temperature applications and special occasions more media .
(2) What is the rubber material elongation ?
A: The elongation rate is the reciprocal of stiffness of a material index , the amount of materials used in the natural state of tension length ratio expressed as a percentage . Material allows elongation is not in permanent damage or permanent deformation occurs before the maximum elongation.
3 What rubber material breathable ?
A: refers to the gas permeability of the material in pneumatic sealing and vacuum -sealed material should be noted that this performance .
4 sealing material FPM, FKM What is the difference ?
Answer : FPM is ISO 1629 abbreviation of fluorine rubber , FKM Viton is ASTM 1418 in the name abbreviation . FPM and FKM are referring to the same kind of Viton, wording is different because the European and American English are spelled differently .
5 braided packing material type which of these categories ?
A: Many types of woven material , according to the material of natural fibers, mineral fibers,barrier security seals synthetic fibers, ceramic and metal fiber four categories.
6 often said that self-healing is the kind of material ?
A: Flexible graphite .