The rubber compounds used in rubber driving belts

Rubber compounds used in rubber driving belts are carefully formulated to meet the unique demands of various industries and applications. Different types of synthetic rubber and a variety of additives are used to create compounds with specific characteristics. 

Neoprene (Chloroprene Rubber): Neoprene rubber is known for its excellent resistance to oil, weathering, and flame. It is a common choice for applications where belts come into contact with oils or are exposed to outdoor conditions. Neoprene belts are often used in industrial machinery and automotive applications.

Nitrile (NBR): Nitrile rubber, or NBR, is valued for its exceptional resistance to oils, fuels, and chemicals. It is commonly used in belts for automotive engines, where exposure to oil and fuel is a concern. NBR belts are known for their durability and flexibility.

Ethylene Propylene Diene Monomer (EPDM): EPDM rubber offers excellent resistance to heat, weathering, UV radiation, and ozone. It is particularly well-suited for outdoor and high-temperature applications. EPDM belts are used in various industries, including HVAC systems and outdoor machinery.

Butyl Rubber (IIR): Butyl rubber is known for its impermeability to gases and excellent resistance to ozone and weathering. It is used in applications where maintaining an airtight seal is crucial, such as some industrial processes and automotive systems.

Carbon Black: Carbon black is a common additive in rubber compounds. It enhances the strength and durability of the rubber while improving its resistance to wear and tear. Carbon black also plays a role in the heat resistance of rubber.

Plasticizers: Plasticizers are used to increase the flexibility and resilience of rubber. They help the rubber maintain its elasticity over a wide temperature range, making it more adaptable to different operating conditions.

Vulcanization Agents: Vulcanization is a crucial process in rubber manufacturing. It involves cross-linking the polymer chains in rubber, which significantly improves its mechanical properties, including strength, elasticity, and heat resistance. Sulfur is a common vulcanization agent used in rubber belt production.

Antioxidants: Antioxidants are added to rubber compounds to protect them from oxidative degradation. This helps extend the lifespan of the belt and maintain its performance over time.

Anti-aging Agents: These additives are used to prevent premature aging of rubber due to exposure to heat, UV radiation, and environmental factors.

Rubber compounds can be customized based on the specific requirements of the application. For example, in the automotive industry, belts used in the engine compartment must withstand high temperatures and exposure to engine fluids. Therefore, the rubber compound for these belts is tailored to provide superior heat and oil resistance.