In order to adjust the load of the silicone button, the hardness of the rubber compound is often adjusted. The hardness of the rubber compound used in the silicone product factory is usually 30 degrees, 50 degrees and 70 degrees. Although only the three hardness materials are used, But you can mix any hardness between 30 degrees and 70 degrees. If you need to produce a silicone product that requires 6kg hardness of 55 degrees, you can use 4.5kg of 50 degree rubber and 1.5kg. It is made up of 70-degree rubber compound, and can also be blended with 2.25kg of 30-degree rubber compound and 3.75kg of 70-degree rubber compound. If a better mathematic friend only needs to formulate an equation, the formula ratio of the rubber compound can be obtained. If the mathematics is not good, the formula can be easily calculated by applying the following formula.
1. (high hardness number - target hardness degree) ÷ (high hardness number - low hardness number) × required weight = low hardness rubber weight
2. Required weight - low hardness rubber weight = high hardness rubber required weight
See here, I believe you have already understood how to calculate the hardness of the silicone button, you need to know more about the silicone button, you can always pay attention to our website or call us.