Precipitated silica is as a reinforcing filler for modifying physical and mechanical properties of tiers and rubber products. The fillers nearly have the lowest price among the other rubber ingredients, nevertheless they have important role in improving rubber products quality. Despite of having rich silica sources and fast growth of rubber industry in Iran, little attention has been paid to this subject, so making this product has been noticed in this research.
In this way, after studying and comparison of a variety of a variety of production methods, the method of neutralization of sodium silicat solution with sulfuric acid was selected and many samples were made accordingly. After optimizing production method parameters like concentration, solution flow rates, washing and drying conditions, the optimum sample (PS1-12) was made.
The physico - chemical tests carried out on the samples show that sample PS-12 behaves like the imported types, so this sample was sent to Iran Tier company for operational tests. The results show that this sample causes improving rubber properties (Abrasion resistance, Tensile strength and Hardness) as well and can be a appropriate replacement for commercial imported products in the rubber industries.