Introduction to Acrylic Fiber in Brake Linings Formulas
Acrylic fiber, a synthetic polymer derived from acrylonitrile, is increasingly adopted in brake linings mixtures for its high-temperature resistance, lightweight properties, and compatibility with other Brake Linings Friction Materials. This article outlines its technical specifications, advantages, and storage protocols, emphasizing its role in optimizing brake linings formulas.
Technical Parameters of Acrylic Fiber in Brake Linings Mixes
| Parameter | Value/Range | Notes |
|---|---|---|
| Fiber Diameter | 10–20 μm | Enhances bonding with phenolic resins and reduces clumping |
| Density | 1.14–1.18 g/cm³ | Lightweight design for reduced rotational inertia |
| Thermal Resistance | Up to 200–250°C | Maintains structural integrity under moderate braking heat |
| Tensile Strength | 300–500 MPa | Reinforces the Brake Linings Mixture matrix |
| Content in Formula | 3–8% (by weight) | Balances friction stability and wear resistance |
Key Advantages of Acrylic Fiber in Brake Linings Formula
- Thermal Stability: Withstands temperatures up to 250°C, reducing thermal degradation during braking cycles.
- Noise Reduction: Fibrous structure dampens vibrations, minimizing high-frequency squeal.
- Cost Efficiency: Lower production costs compared to mineral fibers (e.g., rock wool), enhancing profitability.
- Compatibility: Blends seamlessly with Brake Linings Ingredients like graphite, ceramic particles, and phenolic resins.
Storage and Packaging Guidelines
- Moisture Control: Store in sealed, moisture-proof polyethylene-lined bags to prevent hydration and fiber clumping.
- Temperature Limits: Avoid prolonged exposure to temperatures above 40°C to preserve tensile strength.
- UV Protection: Use opaque packaging to shield from UV degradation, which may weaken fiber integrity.
Integration with Brake Linings Ingredients
Acrylic fiber is typically combined with:
- Friction Modifiers: Graphite (5–12%) and ceramic particles (10–20%) for stable friction coefficients.
- Binders: Phenolic resins (15–25%) to enhance adhesion and thermal resistance.
- Fillers: Barium sulfate (5–10%) to mitigate corrosion and balance thermal expansion.
This brake linings formula achieves a wear rate of ≤0.2 mm/1,000 km under standard driving conditions.
Conclusion
Acrylic fiber serves as a cost-effective, high-performance additive in modern brake linings friction materials, offering a balance of thermal resilience, noise control, and mechanical strength. Proper storage and optimized blending ratios are critical to maximizing its benefits in automotive safety systems.