Rubber manufacturers use calcium carbonate in tires, hoses, gaskets, belts, sealing materials, and footwear. These FAQs explain why.

1. What does calcium carbonate do in rubber?

It acts as a reinforcing filler that improves tensile strength, tear resistance, abrasion resistance, and overall mechanical performance. It also helps maintain consistent compound viscosity during mixing.

2. Why choose CaCO₃ instead of other fillers?

Calcium carbonate has low oil absorption, excellent dispersion, high purity, and stable chemical properties. It offers an ideal balance of performance and cost, making it suitable for NR, SBR, EPDM, and NBR rubber formulations.

3. Does CaCO₃ improve processing efficiency?

Yes. It enhances rheology, reduces mixing time, and stabilizes extrusion output. The compound remains easier to shape and calender, improving productivity across rubber manufacturing lines.

4. Is CaCO₃ used in tires?

Yes. Fine and active calcium carbonate is used in inner tubes, sidewalls, and selected tire rubber components to improve elasticity, aging resistance, and dimensional stability while reducing formulation cost.

5. What rubber products commonly use calcium carbonate?

Hoses, conveyor belts, sealing strips, rubber sheets, gaskets, shoe soles, and molded rubber parts all rely on CaCO₃ for reinforcement and improved service life.