Precipitation method white carbon black, scientific name precipitation water and silica, also known as activated silica. It has the characteristics of high specific surface area, high structural degree, and high activity, and is an extremely important functional filler in the rubber industry. It can significantly improve the performance of rubber products and effectively reduce production costs.
In practical applications, the use of precipitated white carbon black in the rubber industry accounts for over 65%, mainly concentrated in footwear and tire products. Adding white carbon black to rubber components of shoe materials significantly improves the hardness, tensile strength, tear strength, wear resistance, slip resistance, and adhesion of the product, especially in light colored, colored semi transparent, and transparent shoe soles (including outsole, midsole, and perimeter rubber). Adding an appropriate amount of white carbon black to tire tread rubber and carcass rubber can help enhance tear resistance and improve the adhesion between rubber and cord.
1、 The key role of white carbon black in rubber production
（1） Strengthening effect
The nanoscale particles of white carbon black can form chemical bonds with rubber molecules, effectively enhancing the strength and hardness of materials and providing solid physical support for rubber products.
（2） Plasticizing effect
It can reduce the amount of rubber adhesive used, directly lower the formulation cost, and achieve cost control while ensuring product performance.
（3） Performance improvement
Significantly improve the wear resistance of rubber products and extend their service life; Enhance tear resistance and anti-aging performance, so that rubber products can maintain stability in complex environments.
（4） Functional improvement
Increasing the grip of rubber products, reducing rolling resistance, and thereby reducing energy consumption are in line with the current trend of energy conservation and environmental protection.
2、 Specific methods to directly reduce production costs
（1） Reduce raw material consumption
Replacing some carbon black: White carbon black can replace 30% of carbon black and reduce raw material costs while maintaining or even improving product performance.
Reduce the amount of adhesive used: With its plasticizing effect, it can reduce the amount of rubber adhesive used by 5-15%, further reducing costs.
The price advantage is obvious: the price of precipitated white carbon black is only 1/3-1/4 of that of gas-phase method, and the price per ton is between 7000 and 25000 yuan, saving a lot of procurement costs for enterprises.
（2） Optimize production process
Reducing Mooney Viscosity: Using modified precipitated white carbon black can reduce the Mooney viscosity of engineering tire rubber by 25%, improve processing performance, and increase production efficiency.
Reducing aggregate size: By using a twin-screw mixer combined with 3% Si69 coupling agent, the aggregate size can be reduced to below 1 μ m, improving the dispersibility of white carbon black in rubber and optimizing product performance.
Reduce the amount of modifier: Surface treatment of white carbon black can reduce the amount of silane modifier used, thereby further reducing production costs.
3、 Optimization strategy for cost reduction and efficiency improvement
（1） Formula optimization
Accurately balance the ratio of white carbon black to other fillers according to product performance requirements. Using silane coupling agent Si69 to modify white carbon black can increase the unit consumption cost by 5%, but the overall production cost can be reduced by 12%, achieving the best balance between cost and performance.
（2） Process improvement
Adopting segmented mixing process to improve the dispersibility of white carbon black in rubber; Optimize vulcanization conditions, fully utilize the reinforcing effect of white carbon black, improve product quality while reducing production costs.
（3） Alternative solutions
For products with low performance requirements, cheaper fillers (such as calcium carbonate) can be partially used as substitutes; It is also possible to consider combining recycled rubber with white carbon black to further reduce raw material costs.
（4） Source selection
Choose a cost-effective supplier of precipitated white carbon black, and recommend considering photovoltaic silicon by-product white carbon black to obtain more favorable purchasing prices while ensuring product quality.
If rubber companies want to effectively reduce production costs and enhance market competitiveness while ensuring product quality, white carbon black is undoubtedly an ideal choice. In practical applications, enterprises should carefully select the most suitable application plan for white carbon black based on specific product types and performance requirements, in order to achieve the goal of cost reduction and efficiency improvement.