Introduction to Rock Wool in Brake Linings Formulas
Rock Wool, a mineral fiber derived from volcanic rock or slag, is a critical brake linings ingredient that enhances thermal insulation, noise reduction, and structural stability in Brake Linings Friction Materials. Its integration into Brake Linings Mixes ensures durability and performance under high-temperature braking conditions. Below is a technical overview, including specifications, advantages, and storage guidelines.
Technical Parameters of Rock Wool in Brake Linings Formula
| Property | Specification | Test Method |
|---|---|---|
| Fiber Diameter | 4-7 μm | ISO 1888 |
| Melting Point | ≥1000°C | ASTM D276 |
| Density | 80-200 kg/m³ | ISO 845 |
| Thermal Conductivity | 0.035-0.045 W/m·K | ASTM C518 |
| Operating Temperature | -50°C to 750°C | ISO 26865 |
| Content in Formula | 5-15% (by weight) | Custom formulation |
Advantages of Rock Wool in Brake Linings Mixtures
- Superior Thermal Insulation:
Rock Wool’s low thermal conductivity effectively isolates heat generated during braking, preventing thermal degradation of brake linings friction materials and reducing brake fade. - Noise and Vibration Damping:
Acts as an acoustic absorber in brake linings mixes, minimizing squeal and high-frequency vibrations during braking cycles. - Structural Reinforcement:
Its interlocking fibrous network enhances the mechanical strength of the brake linings formula, reducing cracking and delamination under stress. - Fire Resistance:
With a melting point exceeding 1000°C, Rock Wool improves fire safety in high-performance Brake Linings Ingredients, complying with automotive safety standards. - Environmental Compatibility:
Non-toxic and recyclable, Rock Wool aligns with eco-friendly brake linings mixtures, supporting sustainable manufacturing practices.
Storage and Packaging Guidelines
To maintain the integrity of Rock Wool in brake linings ingredients:
- Packaging: Use sealed, moisture-resistant polypropylene bags with inner liners to prevent fiber breakage and contamination.
- Storage Conditions:
- Temperature: <40°C
- Humidity: <65% RH
- Avoid compression or exposure to corrosive chemicals.
- Shelf Life: Up to 24 months in unopened, dry environments.
Applications in Brake Linings Formula
Rock Wool is typically blended with:
- Binders: Phenolic resins or silicone-based polymers.
- Friction Modifiers: Graphite, barite, or cashew dust.
- Reinforcements: Aramid fibers or steel wool.
This Brake Linings Mixture achieves a balance of thermal stability, noise control, and wear resistance, meeting OEM requirements for commercial and heavy-duty vehicles.