Complete Parameters of Rock Wool Series Products
National Standards Implemented: GB/T 11835-2016, GB/T 25975-2018, GB 8624-2012
1. Raw Material Composition
Main material: Basalt and diabase melted at high temperature and centrifuged into inorganic fibers, then cured with binder and hydrophobic agent.
Aluminum foil clad rock wool: Single-sided composite aluminum foil facing to improve vapor barrier, heat reflection and damage resistance.
2. Standard Dimensions & Specifications
2.1 Rock Wool Board (Horizontal Fiber, General Thermal Insulation)
Standard size: 1200×600mm; custom sizes including 1000×600mm, 1200×1000mm available
Regular thickness: 30, 40, 50, 75, 80, 100, 120, 150, 200mm
Density: 60/80/100/120/140/160/180/200 kg/m³
2.2 Rock Wool Strip (Vertical Fiber, Special for External Walls, Ultra-high Tensile Strength)
Sizes: 1200×150mm, 1200×200mm
Thickness: 50–150mm
Common densities: 100, 120, 140 kg/m³
2.3 Rock Wool Blanket (for Pipeline & Curved Surface Insulation)
Width: 1000/1200mm; Length: 10m/20m
Thickness: 20–100mm; Density: 50–100 kg/m³
2.4 Aluminum Foil Clad Rock Wool Board & Blanket
Available foil types: Single-sided embossed aluminum, reinforced aluminum mesh, PET laminated anti-aging aluminum foil; foil thickness 8–20μm for heat reflection and vapor blocking.
3. Core Thermal Performance (National Standard Limit Values)
表格
| Parameter Item | Qualified Index | Unit | Remark |
|---|
| Thermal Conductivity (Mean Temperature: 70℃) | ≤0.040 | W/(m·K) | Premium high-density products ≤0.035 |
| Operating Temperature Range | -200 ~ +650 | ℃ | Long-term high temperature resistance, melting point ≈1100℃ |
| Shrinkage Temperature Under Load | ≥600 | ℃ | No deformation or shrinkage under high temperature |
| Acidity Coefficient | ≥1.6 | — | Indicator for hydrolysis resistance and anti-aging performance |
| Shot Content (Particles over 0.25mm) | ≤7.0 | % | Fineness of fibers |
| Average Fiber Diameter | ≤6.0 | μm | Fundamental indicator of thermal insulation performance |
4. Physical & Mechanical Performance
External Wall Special Rock Wool (GB/T 25975)
Perpendicular Tensile Strength
TR10 (100kg/m³): ≥10kPa
TR15 (120kg/m³): ≥15kPa
TR20 (140kg/m³): ≥20kPa
Vertical fiber rock wool strip tensile strength: ≥80–150kPa (far higher than ordinary rock wool boards)
Compressive Strength (10% compression): ≥40–80kPa (rises with density)
Mass Moisture Absorption Rate: ≤1.0%
Short-term Water Absorption (partial immersion): Board ≤0.4kg/㎡, Strip ≤0.5kg/㎡
Hydrophobic Rate of hydrophobic grade: ≥98% (moisture and water absorption resistance)
Volumetric Water Absorption (full immersion): ≤5%
5. Combustion Performance (Key Fire Safety Index)
Classification per GB 8624-2012: Grade A1 Non-combustible (default property of rock wool substrate)
Grade A1 features: Completely non-combustible, no open flame, zero smoke toxicity, no molten drips, calorific value ≤2.0MJ/kg.
Aluminum foil faced rock wool is mostly classified A2-s1,d0 (non-combustible grade).
Compared with elastomeric foam boards (Grade B1/B2 combustible), rock wool is the preferred fireproof thermal insulation material.
6. Acoustic Performance
Noise Reduction Coefficient (NRC): 0.45~0.75. The porous fiber structure integrates thermal insulation, sound absorption and noise insulation, widely used for noise reduction in machine rooms, partition walls and air ducts.
7. Additional Advantages of Aluminum Foil Clad Rock Wool
Solar heat reflectivity ≥85% to block radiant heat and improve roof thermal insulation effect.
High water vapor diffusion resistance factor to cut off water vapor penetration and prevent internal condensation and dampness.
Protects rock wool fibers from powder shedding, boosts weathering resistance and extends outdoor service life.
国标GB/T 11835-2016、GB/T 25975-2018、GB 8624-2012具体的发布时间是什么？
铝箔岩棉的常规厚度规格有哪些？
岩棉的密度等级有哪些？
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