In the production of clutch facings, the choice of clutch facings friction materials significantly impacts the performance and durability of the final product. Mineral fibers have become a prominent component in clutch facings mixtures and clutch facings mixes, playing a crucial role in enhancing the overall characteristics of clutch facings.

Mineral fibers are incorporated into the clutch facings mixture to improve its mechanical and thermal properties. They act as a reinforcement agent, providing structural integrity to the clutch facings. In a typical clutch facings mix, mineral fibers generally account for 15% – 25% by weight. This proportion is carefully determined to achieve an optimal balance between strength and friction performance.

Mineral fibers exhibit excellent tensile strength. For instance, basalt mineral fibers can have a tensile strength of up to 3000 MPa. In a clutch facings durability test, samples with mineral fibers showed a 40% increase in resistance to wear – induced tearing compared to those without. This high strength ensures that the clutch facings can withstand the mechanical stresses generated during the clutch’s engagement and disengagement cycles, thus extending the lifespan of the clutch.

Mineral fibers can maintain their properties at high temperatures. They can endure temperatures up to 800°C without significant degradation. In a thermal cycling test, clutch facings with mineral fibers retained 90% of their original friction coefficient after 100 cycles between 200°C and 600°C. In contrast, clutch facings without mineral fibers lost 35% of their friction coefficient under the same conditions. This thermal stability is vital for the reliable operation of the clutch in high – temperature environments.

Mineral fibers are highly resistant to chemical corrosion. They are not easily affected by common automotive fluids such as engine oil and transmission fluid. In a chemical immersion test, clutch facings with mineral fibers showed no signs of degradation or change in friction performance after being immersed in engine oil for 30 days. This chemical resistance ensures that the clutch facings maintain their integrity and performance over time.

Despite their high strength, mineral fibers can be brittle. Under sudden impact or high – frequency vibration, they may break. In a vibration – resistance test, clutch facings with mineral fibers had a 20% higher chance of fiber breakage compared to those without. This brittleness can potentially lead to a decrease in the overall strength of the clutch facings and affect their long – term performance.

Mineral fibers can be challenging to process in the clutch facings mixture. Their fibrous structure may cause agglomeration during mixing, which can lead to an uneven distribution in the final product. To achieve a uniform distribution, special processing techniques and equipment are often required, increasing the production cost by about 15% – 20%.

In conclusion, mineral fibers offer significant advantages in terms of strength, thermal stability, and chemical resistance in the production of clutch facings. However, their brittleness and processing difficulties need to be carefully addressed by manufacturers when formulating clutch facings friction materials.