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Tajikistan Carbon fiber pre-oxidized yarn
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Pre-oxidized carbon fiber is an intermediate product in the manufacturing of high-performance carbon fiber, derived from organic precursors such as polyacrylonitrile (PAN) or viscose, which undergo stabilization treatment. In the process of producing carbon fiber, the precursor fibers first undergo pre-oxidation treatment, which causes chemical changes within the fibers, forming an intermediate material known as 'pre-oxidized fiber.' The carbon content of pre-oxidized fiber is relatively low, and its mechanical properties are weaker, but compared to the original organic fibers, its thermal stability and dimensional stability have significantly improved.
When the pre-oxidized fiber undergoes further carbonization and graphitization treatment, it forms the final high-performance carbon fiber, which possesses high strength, high modulus, low density, and good electrical and thermal conductivity.
When used in brake pads, pre-oxidized carbon fiber is typically not used directly but is processed into carbon fiber short cuts or carbon fiber composites. The main purposes of adding carbon fiber to brake pads are as follows:
1. Lightweight: Carbon fiber composites have a low density, which can significantly reduce the weight of brake pads, thereby benefiting the overall weight reduction of the vehicle, improving fuel economy and handling performance.
2. High wear resistance and stability: Carbon fiber has excellent wear resistance and fatigue resistance, allowing it to maintain good mechanical properties under extreme conditions as a brake pad material, extending its service life.
3. Good thermal stability and heat dissipation capability: Carbon fiber brake pads can maintain structural stability at high temperatures and have good thermal conductivity, which helps to dissipate heat quickly and reduce the risk of brake failure due to overheating.
4. Suitable friction performance: Brake pads made from carbon fiber composites can provide a relatively constant and moderate friction coefficient, ensuring the stability and reliability of the vehicle's braking system.
Therefore, in high-end models or situations with special requirements for braking performance, carbon fiber or its composites are widely used in the production of brake pads to achieve the goals of enhancing braking performance, durability, and driving experience.
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