Calcium carbonate (CaCO₃), as a common inorganic filler, plays an indispensable role in the rubber industry. Its excellent physical properties, abundant resources, and relatively low cost make it a widely used additive in rubber products.

1. Functions of Calcium Carbonate in Rubber

• Cost Reduction: As a natural mineral, calcium carbonate is relatively inexpensive and can effectively reduce the production cost of rubber products.

• Increase Volume: The addition of calcium carbonate increases the volume of rubber products, thereby increasing output.

• Improve Physical Properties: 

  • Increase Hardness and Wear Resistance: Calcium carbonate enhances the hardness and wear resistance of rubber products, extending their service life.

  • Enhance Tensile Strength: It strengthens the tensile strength of rubber products, making them less likely to break.

  • Improve Processing Performance: Calcium carbonate improves the processing performance of rubber, making it easier to mold.

  • Enhance Product Stability: It improves the dimensional stability of rubber products, reducing deformation.

2. Applications of Different Types of Calcium Carbonate in Rubber

• Ground Calcium Carbonate (GCC): Primarily used as a filler to reduce costs.

• Precipitated Calcium Carbonate (PCC): Provides reinforcement, improving the strength and rigidity of rubber products.

• Ultrafine Calcium Carbonate: With very fine particle size and excellent dispersion, it significantly improves surface gloss and processing performance.

• Surface-Treated Calcium Carbonate: Special surface treatment on calcium carbonate enhances its compatibility with rubber, further improving product performance.

3. Examples of Calcium Carbonate Applications in Rubber Products

• Tires: Used as a filler in tire treads and sidewalls to improve wear resistance, aging resistance, and tear resistance.

• Adhesive Tapes: Increases the strength, adhesion, and wear resistance of tapes.

• Rubber Hoses: Improves the pressure resistance, wear resistance, and aging resistance of hoses.

• Sealing Products: Enhances the hardness, elasticity, and oil resistance of seals.

4. Development Trends of Calcium Carbonate in the Rubber Industry

• Widespread Application of Ultrafine Calcium Carbonate: With better dispersion, reinforcement, and processing performance, ultrafine calcium carbonate will become the main development direction of the future rubber industry.

• Development of Surface-Treated Calcium Carbonate: Surface modification of calcium carbonate to enhance compatibility with rubber will further improve product performance.

• Composite Application with Other Fillers: Combining calcium carbonate with other fillers (e.g., silica, silicon dioxide) will achieve better overall performance.

Diamond Quantum's Rubber Calcium Carbonate Products—CC, OT, and TDD—can increase the strength and wear resistance of rubber products, extending their service life.

Recommended Products: CC, TDD, OT