The hardness of silicone is the same as that of ordinary rubber, which is distinguished by Shore hardness. Generally, the higher the degree, the harder the hardness. Currently, the hardness of silicone raw materials can reach 0-90 degrees. The raw materials of silicone are divided into solid silicone and liquid silicone. The hardness of solid silicone (mixed silicone rubber) can reach 20-90 degrees, and commonly used ones are 30-70 degrees. If you want to demand silicone raw materials with lower hardness, you need to use liquid silicone. The hardness of liquid silicone is 0-20 degrees, and commonly used ones are 10-20 degrees. Will the hardness of silicone products change after molding, and will the hardness of silicone products change?

Some friends also ask if the hardness of silicone gel will harden during molding? Of course not, the hardness of the formed silicone product and the silicone raw material is the same, so there's no need to worry.

The softness and hardness of silicone are generally adjusted, and the hardness is not much related to temperature. It can be unrelated, and the difference is not significant. The temperature is only related to the curing time. Hongtu Silicone reminds that curing is slow at low temperatures and fast at high temperatures.

What are the impacts of different hardness of silicone products
1. The change in extrusion strength will gradually reduce the force applied to low hardness products, while increase the force applied to high hardness products. Differences of 5-10 degrees will result in different extrusion changes.

2. The change in tear resistance, the higher the hardness, the weaker the tear resistance of the product, especially products with right angles are prone to tearing. Low hardness is better for tearing, and different hardness results in different tearing degrees.

3. The constant elongation stress leads to deformation, and it is an important control index of silicone materials, which is precisely related to hardness. Different hardness, temperature and pressure controlled during vulcanization and vulcanization process have an important relationship with the deformation of the product during stretching.

4. The changes in wear resistance and fatigue strength of products with different hardness have different effects on wear resistance and fatigue strength. Generally, silicone materials increase in hardness and hardness as the crystallinity increases. Long term running in will affect the phenomenon of fatigue strength decreasing and insufficient wear resistance.

5. The difference in elasticity is that elasticity is one of the important elements in silicone materials, so materials with different hardness have an impact on each product for different applications. Excessive differences in hardness may lead to the overall effectiveness of the product, and even affect every aspect of the entire product!

Generally, the process can be changed, and the mold silicone manufacturer can change the product's hardness and softness based on the process. On the material side, mixing polymer substrates, fillers, and additives in different proportions can achieve various intermediate soft and hard values. In terms of process, the time and temperature of heating and curing can also change the hardness without damaging other physical characteristics.

Regarding silicone rubber, please check the details:
https://www.siliconerubbers.net/product-general-purpose-grade-htv-silicone-rubber.html