Incompressibility: Synthetic rubber can change its shape like a fluid. Of course, it cannot flow. When the squeezing force that presses it deforms, it can return to its original shape (that is, the gasket is compressed during the compression process) In which the volume does not change, expressed by the magnitude of pressure change).
Strength: It should have enough strength to withstand the squeezing force that makes it into a sealed state and withstand high-pressure fluid medium (that is, the physical properties such as the tensile strength and fixed tensile strength of the rubber gasket).
Plasticity: By adjusting the formula, it can not only achieve sufficient strength in line with the use, but also have enough plasticity, so that it can be closely attached to the metal surface under appropriate pressure, thereby generating a sealing function (gasket shape and The groove shape of the sealing plate is consistent).
Permeability resistance: The polymer three-dimensional network structure of synthetic rubber can resist the penetration of any qualitative liquid with different chemical properties (resistance to medium).
Temperature resistance: The rubber in polymer materials has a disadvantage, which is that all synthetic rubber materials can only be applied to a relatively narrow temperature range in terms of temperature resistance. Therefore, according to the temperature required for use, choose the material formula carefully is very important.
Service life: Many new synthetic materials have the characteristics of long service life compared with the old type materials. This is due to the use of new additives to extend the service life. In this regard, it is very important to choose the synthetic material formula correctly. All rubber-based synthetic materials will experience stress relaxation.During the use process, due to chemical changes inside the synthetic material, the initial sealing function will gradually decline, and when the sealing performance is low At a minimum, leakage will inevitably occur.