Stone wool board, also known as rock wool insulation decorative board, is an inorganic fiberboard made of basalt as the main raw material and processed by high temperature melting. Key performance indicators include:
- Thermal conductivity: rock wool board is an excellent thermal insulation material, its thermal conductivity is a measure of the material's ability to conduct heat, usually expressed in W/(m·· K). Generally, the thermal conductivity of rock wool board is in the range of 0.026-0.040 W/(m··K), which can effectively prevent heat conduction.
- Density: The density of a stone wool board refers to the mass contained in a unit volume and is usually expressed in kilograms per cubic meter (kg/m³). Density is one of the important indicators to measure the quality of rock wool boards, and rock wool boards with different densities are suitable for different scenarios.
- Compressive strength: Compressive strength refers to the ability of rock wool board to resist deformation and damage when subjected to pressure. This index reflects the mechanical properties of the rock wool board.
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- Combustion performance: Rock wool board has excellent fire performance and is a non-combustible material. It is not easy to burn or produce toxic gases at high temperatures, which can effectively delay the spread of fire. Its fire performance is usually evaluated by the combustion class, and the common combustion grades are A, B1 and B2, where A indicates non-combustible materials.
- Sound absorption: Rock wool board has good sound absorption performance, which can effectively reduce indoor noise and provide a quiet living and working environment. Its sound absorption coefficient is usually between 0.8-1.0, and it has a high sound absorption effect. The sound absorption performance of rock wool board is related to factors such as density, thickness and surface treatment.
- Hydrophobicity and moisture resistance: The hydrophobic rate of hydrophobic rock wool products can reach 99.9%, the water absorption rate is very low, and there is no capillary penetration. In the environment with high relative humidity, the volume moisture absorption rate of rock wool is less than 0.2%, and the mass moisture absorption rate is less than 0.3%.
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- Non-corrosive: rock wool is chemically stable, PH value is 7-8, neutral or weakly alkaline, and there is no corrosion to carbon steel, stainless steel, aluminum and other metal materials.
- Safety and environmental protection: Rock wool is tested to not contain asbestos, CFC, HFC, HFC and other substances harmful to the environment. Stone wool has been recognized as a non-carcinogen by the International Agency for Research on Cancer.
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In addition, there are some other performance indicators of rock wool board, such as slag ball content at room temperature, fiber diameter, working temperature, acidity coefficient, etc., which reflect the quality and performance of rock wool board.
The above information is for reference only, if you want to know more about rock wool in the future, please pay attention to Uetersen rock wool manufacturers.