Barium Sulfate in Rubber Materials

Barium sulfate (BaSO₄) is an inorganic filler used in rubber compounds to enhance specific properties such as density, chemical resistance, and surface smoothness. It is a white, heavy powder with excellent chemical inertness and low solubility, making it ideal for various industrial rubber applications.

Functions of Barium Sulfate in Rubber

1. Increases Density – Adds weight without compromising elasticity, useful in vibration-damping rubber and radiation shielding.

2. Enhances Chemical Resistance – Improves resistance to acids, alkalis, and other harsh chemicals.

3. Improves Surface Properties – Provides a smooth, glossy finish for molded rubber parts.

4. UV & Weather Resistance – Protects rubber from degradation caused by UV light and environmental exposure.

5. Reduces Shrinkage – Helps maintain dimensional stability in molded rubber components.

Applications of Barium Sulfate in Rubber

• Seals & Gaskets – Enhances durability and resistance to harsh environments.

• Medical Rubber Products – Used in X-ray-detectable materials for catheters and gloves.

• Anti-Vibration Rubber – Adds weight to improve damping in automotive and industrial applications.

• Cable Insulation – Improves electrical insulation properties.

• Rubber Coatings & Films – Enhances appearance and weather resistance.

Barium sulfate is particularly valued in high-performance rubber formulations, where density, chemical resistance, and smoothness are critical.