Silicone rubber gasket is simply a substance that plays a role in sealing, which is effectively used in some of these places such as sluice gates and oil pipelines. Due to the use of this product, we can easily avoid all kinds of leakage. Below I will specifically introduce the use and types of silicone rubber gaskets.
Introduction to silicone rubber
Silicone rubber alias: Silicone rubber is a highly reactive adsorbent material, is an amorphous material, its chemical molecular formula is mSiO2-nH2O. insoluble in water and any solvent, non-toxic, tasteless, chemically stable, in addition to the strong alkalis, hydrofluoric acid, does not react with any substance. Various models of silica gel have different microporous structures due to their different manufacturing methods.
The chemical composition and physical structure of silica gel determine that it has many other similar materials difficult to replace the characteristics: high adsorption performance, good thermal stability, chemical stability, high mechanical strength. Silica gel according to the size of its pore size is divided into: large pore silica gel, coarse pore silica gel, B-type silica gel, fine pore silica gel, bearing transparent or milky white granular solid.
The main chain consists of alternating silicon and oxygen atoms, with organic groups on the silicon atom of synthetic rubber.
The organic groups in the molecule can be -CH3, -C2H3 or -C6H5, etc., accordingly called methyl, vinyl or methyl phenyl silicone rubber. Silicone rubber is a kind of high and low temperature resistance (-60 ~ 250 ℃), resistance to odor and oxidation and has good electrical insulation properties of special rubber.Uses of silicone rubber
1, silicone products are indispensable components of the production of photocopiers, keyboards, electronic dictionaries, remote controls, toys, silicone buttons and so on.
2, can be used to do durable shaped molding gasket, electronic parts of the encapsulation material, automotive electronic parts of the maintenance material.
3, can be used to make electronic components, molding high point pressure edge.
4, can be used to make conductive silicone, medical silicone, foam silicone, molding silicone.
5, used in the construction and repair of housing, high-speed kilometer joint sealing, bridge sealing and other sealing projects.
6, can be used for baby products, mother and baby products, baby bottles, bottle protectors.
7, can be used for kitchen products, kitchenware production and related auxiliary kitchenware products.
8, can be used for medical equipment accessories, due to the silicone colorless, tasteless and non-toxic properties are widely used in the medical industry.
Types of Silicone Rubber Gaskets
I. Solid Silicone Gaskets
Its English name is SolidSiliconeGaskets, in the manufacture of this type of product can be utilized in the way of die-cutting or waterjet cutting to manufacture. Its hardness is standardized, with levels ranging from 10-70 hardness.
Like some of the lower hardness (10A, 20A, 30A) although has a relatively poor closing force, but also can have a good environmental sealing function. With the rise of hardness index, the solid gasket closing force is also gradually increased. For the metal shell and some rigid shell can be used such gaskets. The relevant indicators are introduced as follows:Solid Silicone Gasket
Scope of application: Heavy water sealing and sinking
Hardness requirements: Wide range of hardness (10-70 Shore A)
Wide range of temperatures
Performance: UV and ozone resistance
Fabrication: Can be die-cut or waterjet cut
II. Sponge Silicone Gasket
Its full name in English is SiliconeSpongeGaskets, the texture of these products is very soft, compared with the solid silicone gaskets we said above, there are still some low hardness of the solid characteristics. For this sponge hardness, generally can be deflected by compression force of 25% of this range. Generally we put the size of 2 to 5 pounds of compression force can cause deformation of this situation is considered to be the soft standard, for the 14 to 20 pounds of this range is called firm. Silicone sponge is an environmentally friendly seal with a closed cell structure that produces excellent application results. The products are available in NEMA 4 and IP64 sizes. The indicators related to these products are as follows:
Sponge Silicone Gasket
Usage: Heavy-duty water jet sealing engineering aspects
Temperature of use: -100 °F to 500 °F
Performance: UV and ozone resistance
Fabrication: Can be die-cut or waterjet cut
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