Introduction to Car Brake Shoes with NAO (Non Asbestos Organic) Formula
NAO brake shoes utilize an advanced Brake Shoes Formula composed of eco-friendly Brake Shoes Friction Materials, eliminating hazardous asbestos while maintaining high performance. This Brake Shoes Mixture combines organic fibers, resins, and ceramic compounds to deliver reliable braking efficiency across diverse driving conditions.
Technical Specifications
| Parameter | Value/Description |
|---|---|
| Friction Coefficient | 0.35–0.42 (μ) |
| Operating Temperature | -30°C to 550°C |
| Compressive Strength | ≥75 MPa |
| Density | 1.9–2.2 g/cm³ |
| Hardness (Rockwell) | 80–85 HRB |
| Certifications | SAE J661, ECE R90, ISO 26865 |
Key Advantages
- Eco-Friendly & Safe
- The Brake Shoes Mixes replace asbestos with organic fibers (aramid, cellulose) and ceramic particles, complying with global environmental regulations (e.g., EU REACH).
- Low Noise & Vibration
- Optimized brake shoes friction materials reduce high-frequency noise by 40% compared to semi-metallic formulas, ideal for urban driving.
- Consistent Performance
- Stable friction coefficient across temperatures (-30°C to 550°C), minimizing brake fade during prolonged use.
- Corrosion Resistance
- Ceramic-enhanced formula resists moisture and salt corrosion, extending drum lifespan by 25%.
Storage & Packaging Requirements
- Packaging:
- Individually wrapped in anti-oxidation paper and sealed in moisture-proof polyethylene bags.
- Stacked in reinforced cartons with shock-absorbent inserts (max 8 pairs per box).
- Storage:
- Temperature: 5°C–30°C in dry, ventilated warehouses.
- Relative humidity: <65% to prevent material degradation.
Formula Composition Breakdown
The brake shoes formula includes:
- Friction Modifiers: Graphite (10–12%), iron oxide (5–8%)
- Binders: Phenolic resin (12–15%)
- Reinforcements: Aramid fibers (20–25%), ceramic powder (8–10%)
- Fillers: Barium sulfate (15–18%), rubber particles (5–7%)
This NAO brake shoes mixture ensures balanced braking force for passenger cars and light-duty commercial vehicles, combining safety, durability, and environmental sustainability.