How to understand the viscosity and hardness of silica gel

(1) Silicone rubber viscosity

Silicone rubber viscosity refers to the volumetric property of a liquid, pseudo-solid or pseudo-solid material against flow, that is, internal friction or internal flow resistance exhibited by molecules when flowing by an external force.

Usually, the viscosity of silicone rubber is proportional to the hardness of silicone rubber.

(2) Silicone rubber hardness

Silicone rubber hardness refers to the ability of a silicone rubber material to partially resist the pressing of a hard object into its surface.

Silicone rubber has a Shore hardness range of 10 to 80, which gives designers the freedom to choose the hardness they need to achieve the desired function.

Various intermediate hardness values can be achieved by mixing the polymer substrates, fillers, and auxiliaries in different ratios.

Similarly, the time and temperature of heat curing can also change the hardness without damaging other physical characteristics.