Overview
Gray-white rock wool board is an inorganic insulation material manufactured by melting natural basalt and other minerals at high temperatures, followed by fiberization. It is widely used in construction for its superior thermal insulation, fire resistance, and sound absorption properties. The material is particularly favored in industrial and commercial buildings where fire safety and energy efficiency are critical. Its gray-white color is a result of the natural minerals used in production, distinguishing it from other types of rock wool.
Structure and Working Principle
The board consists of intertwined mineral fibers bonded with thermosetting resin. Its porous structure traps air, reducing heat transfer and providing excellent thermal insulation. When exposed to fire, the material does not combust or release toxic fumes, making it ideal for fireproofing applications. The dense fiber matrix also effectively absorbs sound waves, contributing to noise reduction in buildings.
Key Features
Gray-white rock wool board offers several advantages, including non-combustibility (A1 fire rating), high thermal resistance (thermal conductivity of 0.035-0.045 W/m·K), and excellent sound absorption (NRC up to 0.95). Additionally, it is resistant to moisture and mold growth, ensuring long-term performance. The material is also chemically stable and does not react with most building materials.
Application Areas
This material is extensively used in exterior wall insulation, roof insulation, and fire barriers in commercial and residential buildings. It is also employed in industrial facilities for pipe insulation and HVAC system soundproofing. In addition to construction, gray-white rock wool board finds applications in shipbuilding and automotive industries for thermal and acoustic insulation.
Maintenance and Precautions
Rock wool boards require minimal maintenance once installed. However, regular inspections should be conducted to ensure no damage or moisture accumulation has occurred. During installation, workers should wear protective clothing, gloves, and masks to prevent skin irritation from the fibers. Proper sealing of joints and edges is essential to maximize performance.
B2B Procurement Guide
When procuring gray-white rock wool boards, consider factors such as density (typically 80-200 kg/m³), thickness (20-200 mm), and fire resistance rating. Verify certifications like ISO 9001 and CE marking for quality assurance. Bulk purchases often attract discounts, and suppliers may offer customized sizes and packaging. Lead times vary but are generally 1-2 weeks for standard products.
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