What is the appropriate hardness for silicone buttons?

Although 30 ° silicone and 70 ° silicone can also be used with 55 ° silicone, it is still not recommended to mix them together. This is because mixing these two types of rubber together not only makes the rubber extremely sticky to the rollers, but also makes it difficult to demold during hydraulic molding, especially for silicone buttons with complex structures in silicone products.
The hardness of silicone buttons is determined by the silicone raw material, with common silicone hardness levels of 30, 50, and 70 degrees. As the hardness of silicone buttons increases, their tactile feel improves. However, if the hardness is too high, it can also affect the product's service life. The lower the hardness, the softer the corresponding Keypad of the silicone button will be, resulting in a poorer tactile feel. Additionally, the friction between the Key and the plastic hole will increase, which can easily cause key jamming. Therefore, making silicone buttons generally requires a silicone hardness of 50 ° or 60 °.

I'm not very familiar with the hardness of silicone buttons, right! Below we will explain in detail the common hardness of silicone buttons.

Just like how we need to mix 55 degree 10KG weight silicone, using 50 ° and 70 ° silicone, according to the formula, the weight distribution of 2.5KG of 70 ° silicone and 7.5KG of 50 ° silicone can produce 55 ° silicone. The same principle applies to other degrees of silicone.

When the customer requests customized silicone buttons with a hardness that is not on the commonly used silicone hardness values, the hardness needs to be adjusted according to the customer's requirements. Specific allocation formula:

(Target hardness degree - Low hardness degree) ÷ (High hardness degree - Low hardness degree) x Required weight=Weight of high hardness rubber material

Required weight - weight of high hardness rubber material=weight of low hardness rubber material