The hardness of liquid silica gel is a parameter characterizing the material resistance to external pressure into its surface ability, which reflects the degree of softness and hardness of the material, corresponding to the material resistance to local deformation, especially plastic deformation, indentation or scratch ability.There are many ways to characterize Hardness. As a kind of rubber, silicone Hardness is generally characterized by Shore Hardness!For silica gel, schell hardness is the use of static extrusion measurement method, according to the different hardness range, the use of SCHell A, SCHell C, SCHell D three hardness tester!Corresponding to HA, HC, HD three units!Liquid silica gel and solid silica gel Z commonly used is shao A hardness tester.

    For liquid silica gel, its common hardness is saA0 degrees to 70 degrees, solid silica gel is saA30-70 degrees, lower than the liquid silica gel saA0 degrees also have, but because of the need to customize less, it needs to be measured with saC hardness tester!Liquid silica gel can also produce shao A80 to 90 degrees of material, but will be more brittle, not often used!Higher than sau A90, silica gel sau D hardness tester to measure!This type of silicone is very hard, but not very elastic.

    Let's look at the commonly used silica gel product hardness to understand the hardness of this parameter in sensibility, silica gel watchband general shao A70 degrees, silica gel mobile phone cover Shao A60 degrees, silica gel button shao A50 degrees, silica gel pacifier shao A30 to 40 degrees!Silicone chest pad at A0 degrees.

    The choice of hardness of liquid silica gel or solid silica gel mainly depends on its use condition, if the force is large, the deformation rate requires high hardness of silica gel, and the requirements of elasticity, not easy to tear, choose low hardness silica gel.In addition to hardness, some other physical parameters, such as tensile strength, tear strength, elongation at break and other parameters are also very important, sometimes also need to consider electrical properties, such as valency volume resistivity, dielectric constant and other indicators.

    The use of silica gel has certain requirements for professional skills. If you do not know how to choose, you can consult our new best online and let our customer service help you choose the right silica gel products.