Introduction to Truck Brake Linings NAO (Non-Asbestos Organic) Mixture
Truck brake linings NAO mixtures are eco-friendly brake linings friction materials designed to replace traditional asbestos-based formulations. By combining organic fibers, resins, and friction modifiers, the brake linings formula achieves a balance of performance, durability, and environmental compliance. Below is a detailed overview of its composition, technical specifications, advantages, and storage guidelines.
Technical Parameters
The table below outlines the key properties of NAO-based brake linings mixes:
| Parameter | Specification | Remarks |
|---|---|---|
| Organic Fiber Content | 20-40% (Aramid, cellulose, glass) | Provides structural reinforcement |
| Resin Binder | 30-50% (Phenolic or rubber-modified) | Ensures thermal stability and adhesion |
| Density | 1.9-2.5 g/cm³ | Optimizes weight and strength balance |
| Friction Coefficient (μ) | 0.35-0.45 (Dry) | Consistent performance across conditions |
| Operating Temperature | -50°C to 350°C | Resists moderate thermal fade |
| Compressive Strength | ≥200 MPa | Suitable for heavy-duty braking |
| Wear Rate | ≤0.4 cm³/MJ | 30% lower than semi-metallic mixes |
| Shore Hardness | 50-65 Shore D | Reduces drum wear |
Key Advantages
- Eco-Friendly Composition
Asbestos-free brake linings mixture aligns with global regulations (e.g., EU REACH) and minimizes health risks . - Low Noise and Vibration
Rubber and graphite additives in the brake linings formula dampen noise, ideal for urban trucking . - Thermal Stability
Phenolic resins maintain friction consistency up to 350°C, reducing brake fade during frequent stops . - Reduced Dust Emission
Generates 50% less particulate matter compared to metallic formulations, enhancing environmental safety . - Cost-Effectiveness
Lower production costs and extended lifespan (60,000–100,000 km) make NAO mixes ideal for fleet operations .
Storage and Packaging
- Moisture Protection: Packaged in vacuum-sealed, aluminum-coated bags to prevent resin degradation .
- Temperature: Store in dry conditions (15°C–30°C); avoid direct sunlight to prevent binder hardening .
- Stacking: Maximum 6 layers to avoid deformation of friction linings .
- Shelf Life: 24 months in unopened, factory-sealed containers .
Application of Brake Linings Mixes
The brake linings mixes are compression-molded at 150–200°C and 10–20 MPa pressure to bond organic fibers with steel backing plates. Post-curing, they undergo quality tests for shear strength (≥2.5 MPa) and thermal cycling resistance (300 cycles at 300°C). Custom formulations are available to meet OEM-specific requirements for friction profiles or drum compatibility .
By integrating sustainable materials with robust engineering, NAO-based brake linings friction materials deliver reliable, quiet, and eco-conscious braking solutions for modern commercial vehicles.