Fillers is a category name for substances that are contained in a finished product in addition to the base material. They reduce the concentration of the usually more expensive base material in the end product.
In sealing technology, fillers are primarily carbon blacks, which are contained in the material mixture alongside the base elastomer and additives.
Fillers are added to the mixture during compounding. Together with other additives in significantly lower concentrations, they are used to adjust certain physical material properties such as
- Hardness
- Tensile strength
- Elongation at break
- Abrasion resistance