CLUTCH FRICTION MATERIALS

Clutch Facings Rubber Accelerator (MBTS/DM)

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    The Application of Rubber Accelerator (MBTS/DM) in Clutch Facings Production

    In the intricate process of manufacturing clutch facings, the use of various materials and additives is crucial to achieve optimal performance. Rubber Accelerator (MBTS/DM) has emerged as a significant component in the production of clutch facings friction materials, being incorporated into clutch facings mixtures and clutch facings mixes.

    I. Role in Clutch Facings Production

    Rubber Accelerator (MBTS/DM) is primarily added to the clutch facings mixture to enhance the curing process of the rubber – based components within the clutch facings. It typically accounts for 0.5% – 2% by weight in the clutch facings mixture, depending on the specific requirements of the clutch facings’ performance. This accelerator promotes the cross – linking of rubber polymers, which in turn affects the mechanical and frictional properties of the clutch facings.

    II. Advantages

    A. Faster Curing Time

    1. Production Efficiency
      • One of the most notable advantages of using Rubber Accelerator (MBTS/DM) is the significant reduction in curing time. In a standard curing process for clutch facings, without the accelerator, the curing time at 150°C might be around 30 – 40 minutes. However, when 1% of MBTS/DM is added to the clutch facings mixture, the curing time can be reduced to 15 – 20 minutes. This shorter curing time leads to increased production efficiency and lower production costs.
    1. Energy Savings
      • The reduced curing time also results in energy savings. Since the curing process requires heat, a shorter curing period means less energy consumption. For example, in a large – scale clutch facings production facility, the use of MBTS/DM can save approximately 30 – 40% of the energy required for the curing process per batch.

    B. Improved Friction Performance

    1. Stable Friction Coefficient
      • Rubber Accelerator (MBTS/DM) contributes to a more stable friction coefficient in clutch facings. In a friction – coefficient test under different loads and speeds, clutch facings with MBTS/DM exhibited a friction coefficient that remained within the range of 0.3 – 0.45, with a fluctuation of less than ±0.05. This stability ensures smooth clutch engagement and disengagement, reducing the likelihood of sudden jerks or slips during vehicle operation.
    1. Enhanced Friction Durability
      • The addition of MBTS/DM also enhances the friction durability of clutch facings. In a wear – test with 200,000 clutch engagement – disengagement cycles, the wear rate of clutch facings with MBTS/DM was 0.03 – 0.05 mm per 100,000 cycles, while that of clutch facings without the accelerator was 0.06 – 0.08 mm per 100,000 cycles. This indicates that the use of MBTS/DM can extend the service life of clutch facings.

    III. Disadvantages

    A. Potential for Over – Curing

    1. Mechanical Property Degradation
      • If the dosage of Rubber Accelerator (MBTS/DM) is not carefully controlled, there is a risk of over – curing in the clutch facings. Over – cured clutch facings may experience a significant reduction in their mechanical properties. For example, in a test where the dosage of MBTS/DM was increased by 50% beyond the recommended amount, the tensile strength of the clutch facings decreased by 20 – 30%, making them more prone to cracking and failure during operation.
    1. Friction Coefficient Instability
      • Over – curing due to excessive MBTS/DM can also lead to an unstable friction coefficient. The friction coefficient may fluctuate wildly, with a range of ±0.1 – 0.15, which can cause erratic clutch behavior and poor driving experience.

    B. Environmental and Health Concerns

    1. Toxicity
      • Some components in Rubber Accelerator (MBTS/DM) may be toxic. During the production process, workers may be exposed to harmful substances if proper safety measures are not taken. In addition, the disposal of clutch facings containing MBTS/DM at the end of their life cycle may pose environmental risks, as the toxic substances may leach into the soil and water.
    1. Air Pollution
      • The curing process of clutch facings with MBTS/DM can release volatile organic compounds (VOCs) into the air. In a production facility, the emission of VOCs during the curing process with MBTS/DM can be 10 – 15 mg/m³, which contributes to air pollution and may require additional pollution – control measures.
    In conclusion, Rubber Accelerator (MBTS/DM) offers significant advantages in terms of production efficiency and friction performance in the production of clutch facings. However, the potential for over – curing and environmental/health concerns associated with its use must be carefully managed. Manufacturers need to strike a balance between the benefits and risks to ensure the safe and efficient production of high – quality clutch facings.