Incompressibility: synthetic rubber is like a fluid can change its shape, of course, it is impossible to flow, when the squeeze pressure to force it to deform disappears, it can be restored to the original shape (that is to say, the gasket in the compression process of its volume remains unchanged, expressed in terms of the size of the pressure change).
Strength: it should have enough strength to withstand the extrusion pressure that brings it into the sealing state and to withstand high-pressure fluid medium (i.e. physical properties such as tensile strength and constant tensile strength of the rubber gasket).
Plasticity: by adjusting the formula, so that it can achieve both sufficient strength to meet the use, but also have enough plasticity, so that it can be under the appropriate pressure and the metal surface close to the metal surface, so as to produce a sealing function (gasket shape and sealing plate groove shape to achieve consistency).
Penetration resistance: the polymer three-dimensional network structure of synthetic rubber can resist any different chemical quality liquid penetration (media resistance).
Temperature resistance: rubber in polymer materials has a disadvantage that causes all synthetic rubber materials to be temperature resistant only in a relatively narrow temperature range. It is therefore important that the formulation of the material is carefully selected according to the temperature required for the application.
Service life: Many of the newer synthetic materials are characterised by a longer service life compared to older models, due to the use of new additives which further extend the service life. In this regard, the correct choice of synthetic material formulations is very important, all rubber-based synthetic materials will occur stress relaxation phenomenon, in the process of use, due to chemical changes within the synthetic material, the initial sealing function will gradually decline, and when the sealing performance is lower than the limit of the **, leakage will inevitably occur.
