For consumers do not know the silicone material physical hardness silicone products are likely to produce what all don’t understand the idea of the product are the same size did not change too much, and the relationship between the formula and various physical property is not complete to understand, all kinds of silicone, rubber and other hard material of raw materials has its softness characteristics, natural silica gel products is not exceptional also, So why silica gel material can be used in all walks of life in the world, formally because of its excellent hardness!
Different silicone products has its unique performance and technical requirements
such as silicone manufacturer of silica gel seal, silicone accessories can choose the most suitable polymer and cooperation and reasonable allocate, closely joint sealing damping in the hardness, waterproof and oil etc, and the physical properties of hardness or with the formula of the product and raw materials have a close relationship, Formula debugging can try out a variety of performance differences and functions, so soft and hard debugging or need to be careful, otherwise the error is likely to cause inevitable trouble!
We all know that silica gel material has good tensile strength, and the index of tensile strength depends on the degree of softness and hardness of the product. The hardness of silica gel products is generally about 30-80 degrees, the lower the hardness, the better the tensile strength of the product, normally can reach about 300%, the minimum is about 20%, But it depends on the structure and shape of silicone products to decide.
Silicone material can not be missing this is the tear strength, silicone rubber materials will be forced and other factors and tear phenomenon, this is one of the inevitable phenomena of all rubber, and cracks and cracks caused by stress cracking phenomenon accounted for a minority, because silicone rubber with conventional hardness will not have tear rupture phenomenon, Materials with higher hardness are likely to tear due to the spread of the crack mouth!
So the tensile strength and hardness of silica gel products is an important index of materials, silica gel processing manufacturers in the vulcanization production procedures, the greater the molecular weight of silicon mixing glue is effective cross-linking fixed elongation stress is greater. In order to obtain the specified constant elongation stress, the crosslinking density can be appropriately increased for the material with small molecular weight. Any structural factor that increases intermolecular forces. Improve the density of silica gel material can prevent the hardness of the product will affect the tensile strength of the product!
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