Introduction to Rock Wool in Brake Linings Formulas
Rock Wool (also known as mineral wool) is a versatile inorganic fiber widely utilized in brake linings mixtures for its exceptional thermal insulation, vibration damping, and structural reinforcement properties. As a key component in Brake Linings Friction Materials, it enhances performance under high-temperature braking conditions while reducing noise and wear. Below is a detailed technical overview, including specifications, advantages, and storage guidelines.
Technical Parameters of Rock Wool in Brake Linings Formula
| Property | Specification | Test Method |
|---|---|---|
| Fiber Length | 5-20 mm (adjustable for formulation) | ISO 1887 |
| Density | 80-150 kg/m³ | ASTM C167 |
| Melting Point | ≥1000°C | ASTM D2766 |
| Thermal Conductivity | 0.035-0.045 W/m·K | ISO 8301 |
| Operating Temperature | -40°C to 700°C | ISO 26865 |
| Acoustic Absorption | 0.6-0.9 (NRC rating) | ASTM C423 |
| Content in Formula | 5-15% (by weight) | Custom formulation |
Advantages of Rock Wool in Brake Linings Ingredients
- Superior Thermal Insulation:
Rock Wool’s low thermal conductivity effectively isolates heat generated during braking, preventing thermal degradation of the brake linings formula and extending component lifespan. - Noise and Vibration Reduction:
Its fibrous structure dampens high-frequency vibrations, minimizing brake squeal in brake linings friction materials. - Chemical Stability:
Resists oxidation and chemical corrosion, ensuring consistent performance in harsh environments. - Mechanical Reinforcement:
Enhances the structural integrity of Brake Linings Mixes by interlocking with resins and other fibers, reducing crack propagation under stress. - Eco-Friendly Compatibility:
Non-toxic and recyclable, aligning with regulations for sustainable brake linings ingredients.
Storage and Packaging Guidelines
To maintain the quality of Rock Wool in brake linings mixtures:
- Packaging: Use compressed bales wrapped in UV-resistant polyethylene film or sealed cardboard boxes to prevent moisture absorption.
- Storage Conditions:
- Temperature: <35°C
- Humidity: <55% RH
- Avoid stacking heavy materials on top to prevent fiber compaction.
- Shelf Life: 24 months in dry, unopened packaging.
Key Applications in Brake Linings Formula
Rock Wool is typically blended with:
- Binders: Phenolic or epoxy resins.
- Friction Modifiers: Graphite, molybdenum disulfide.
- Reinforcements: Steel fibers, aramid fibers.
This hybrid Brake Linings Mixture balances thermal resilience, noise control, and mechanical strength, meeting OEM requirements for heavy-duty and automotive applications.