Silicone product manufacturers in the production of transparent silica gel products, will find that the original should be transparent colorless silica gel products like a color, organic silica gel is with temperature resistance and aging resistance and other properties, transparent silica gel products will not yellow for a few years, what is the reason for the existence of such a difference?
1, curing agent:
The effect of ordinary non-yellow vulcanizing agent on the color is bright and the effect of light color or transparent color is not the same. Using ordinary vulcanizing agent, light color or transparent silica gel products can be obviously seen to turn yellow.
2. Production process:
Transparent silica gel products in the molding, because the temperature of the machine is too high, or the curing time is too long, it is easy to lead to the yellow silica gel products after forming, so it is necessary to strictly control the temperature and curing time of the mold.
3. Raw materials:
Add anti-yellow vulcanizing agent in the raw material. If the transparent silica gel product will turn yellow after molding, it should be that the yellow resistance of the raw material is too poor. You can consider replacing the raw material.