Black Rock Wool Board is a high-performance acoustic insulation with a black glass fiber tissue facing laminated to a rock wool core.
Ideal for concealed applications behind perforated metal, gypsum, wood, or fabric panels in concert halls, theaters, studios, cinemas, and industrial-style offices. Provides superior sound absorption, A1 fire resistance, and eliminates light reflection through perforations.
| Item Name | LL-RWBB-01 | Unit | Standard |
|---|---|---|---|
| Shot content | ≤4 | % | GB/T 5480 |
| Thermal conductivity (25°C) | ≤0.039 | W/(m·k) | GB/T 10294 |
| Combustion performance | Class A | --- | GB 8624-2012 |
| Acidity coefficient | ≥1.8 | --- | GB/T 5480 |
| Hydrophobic rate | ≥99 | % | GB/T 10299 |
| Mass moisture absorption rate | ≤1.0 | % | GB/T 5480 |
| Water absorption (Partial Immersion) Short term (24h) | ≤0.4 | kg/m² | GB/T 30805 |
| Water absorption (Partial Immersion) Long term (28d) | ≤2.0 | kg/m² | GB/T 30807 |
| Noise reduction coefficient (NRC) | ≥0.6 | --- | GB/T 18696.1 |
| Dimensional stability | ≤1.0 | % | GB/T 30806 |
| Melting temperature | ≥1000 | °C | --- |
| Thickness tolerance | ±3 | mm | GB/T 5480 |
| Right-angle degree of deviation | ≤5 | mm/m | GB/T 5480 |
| Flatness tolerance | ≤5 | mm | GB/T 25975-2018 |
The dense, open-fiber structure provides excellent sound absorption across a wide frequency range. For a typical 50mm thick board (often installed behind perforated panels), the Noise Reduction Coefficient (NRC) commonly reaches 0.90–0.95, significantly reducing echo and reverberation for improved room acoustics in auditoriums, studios, and offices.
2. Effective Visual ConcealmentThe black glass fiber tissue facing offers very low light reflectance, creating a strong "shadow" effect. This is essential in exposed or perforated ceiling and wall systems (e.g., metal, timber slats, or open-cell designs), allowing concealment of structural elements, ducts, cables, and services while preserving the overall acoustic performance and achieving a clean, minimalist aesthetic.
3. Air Erosion and Fiber RetentionThe factory-laminated black glass fiber tissue acts as a durable surface reinforcement, preventing fiber release or erosion even in environments with airflow (e.g., air-return systems in cinemas, stadiums, or exposed industrial ceilings). This ensures long-term cleanliness and maintains indoor air quality without fiber shedding.
4. Class A1 Non-Combustible Fire PerformanceManufactured from inorganic basalt rock, black-faced rock wool is Euroclass A1 non-combustible with a melting point exceeding 1000°C. It does not ignite, propagate flames, or emit toxic smoke, making it a safe choice for high-occupancy venues such as theaters, concert halls, schools, and public buildings where stringent fire regulations apply.
5. Hydrophobicity and Long-Term StabilityFactory-treated for water repellency, the boards resist moisture absorption and exhibit excellent dimensional stability with virtually no shrinkage, sagging, or warping over time. Being inorganic, they do not support mold or microbial growth, ensuring consistent acoustic and structural performance throughout the building's lifespan.
About Us
Anhui Liluan Technology Co., Ltd. is an industrial manufacturer specializing in high-performance thermal insulation and acoustic materials since 2009. We operate advanced, automated production lines delivering rock wool, glass wool, and ceramic fiber solutions engineered to meet rigorous international standards for global industrial, commercial construction, and architectural acoustics projects.
The factory-laminated black fiberglass tissue (fleece) serves two critical engineering functions in acoustic applications:
Fiber Containment: It acts as a durable, air-erosion-resistant shield that prevents loose mineral fibers from shedding or migrating into the indoor air stream, ensuring compliance with indoor air quality standards.
Visual Masking: The matte-black, non-reflective surface eliminates light reflection. This makes it ideal for installation behind perforated metal ceilings, acoustic wood slats, or cinema screens, keeping the background insulation completely invisible.
Acoustic attenuation is determined by the board's open-porous fiber structure, which traps and dissipates sound waves:
Optimized Densities: We manufacture sound absorption boards in densities ranging from 80kg/m³ to 200kg/m³. For standard wall paneling, recording studios, and ceiling baffles, a density of 60 kg/m³ to 80 kg/m³ provides the optimal acoustic curve.
High Noise Reduction Coefficient (NRC): Depending on the specified thickness (50mm to 100mm), our black rock wool boards achieve an NRC rating of 0.85 to 1.00, showcasing exceptional absorption in the mid-to-high frequency bands (500Hz - 4000Hz) where mechanical and vocal noise is most prevalent.
Public venues like theaters, concert halls, and mechanical rooms demand strict material compliance:
Class A1 Non-Combustibility: The core stone wool matrix is entirely non-combustible and can withstand temperatures exceeding 1000°C, acting as a structural fire barrier.
Dimensional Stability: Unlike flexible fiberglass blankets that tend to sag over time, our resin-bonded rock wool boards possess excellent rigidity. They resist sagging, warping, or moisture-induced deformation when installed vertically or within ceiling T-grids.
We streamline international B2B procurement workflows with a comprehensive service matrix:
Custom Engineering: Tailored adjustments to board dimensions, thicknesses, and specialized densities to match your project’s specific architectural submittals.
Technical & Acoustic Data Support: Provision of independent test reports regarding sound absorption coefficients, fire ratings, and material safety data.
Export-Grade Logistics: Heavy-duty, moisture-proof palletized packaging designed to maximize container utilization and protect the black tissue face from abrasion during ocean transit via local river ports like Nanjing and Wuhu or Shanghai port.
