How do you control the shrinkage of silicone seals?

Sealing protection in various industries have a wide range of applications, silicone sealing ring is a common seal, it is mainly to good clamping force and support force to seal protection, we design sealing ring, the shrinkage of the material control is very important.

The shrinkage of silicone sealing ring is also regular, to pay attention to the following points:

1. The shrinkage rate of the silicone seal ring also shrinks as the hardness of the silicone raw material increases and the saddle curve changes.

2. The shrinkage rate of silica gel product increases with the increase of the injection amount of raw material, when the quality of raw material & GT;Product quality 5%-10%, the shrinkage rate is more stable.

3. The shrinkage rate of silicone sealing ring is changed with the increase of the density of the vulcanized silica gel material, which is usually 0.0013.

4. The better the plastic, the smaller the shrinkage, the higher the hardness of the plastic, the smaller the shrinkage.

5. The shrinkage of the adhesive rolling direction and the flow direction of the solid phone in the mold is greater than the shrinkage in the vertical direction.