The core structural feature of rock wool boards lies in their porous, interwoven structure composed of inorganic fibers. This structure endows them with excellent thermal insulation, fire resistance, and sound absorption properties.
Rock wool boards use natural rocks such as basalt and dolomite as their main raw materials. After being melted at temperatures above 1400℃, they are centrifuged into fibers, forming a large number of long, thin, randomly interwoven inorganic fiber networks. These fibers form numerous tiny, closed pores filled with still air. Since air is a poor conductor of heat, it effectively blocks heat transfer, achieving highly efficient thermal insulation.
Furthermore, this porous structure also has the following advantages:
Excellent Fire Resistance: Rock wool is a Class A non-combustible material, resistant to temperatures above 1000℃. It will not burn or release toxic fumes in a fire, effectively preventing the spread of fire.
Strong Sound Absorption and Noise Reduction Capabilities: The porous interconnected structure formed by the fibers absorbs sound wave energy and converts it into a small amount of heat energy, significantly reducing noise levels.
Water-repellent and moisture-proof: High-quality rock wool boards undergo water-repellent treatment, achieving a water repellency rate of up to 99.9% and extremely low water absorption, making them suitable for use in humid environments.
Chemically stable: With a pH value of 7–8, it is neutral or weakly alkaline, exhibiting no corrosive effect on metals such as carbon steel, stainless steel, and aluminum, and does not cause mold or bacterial growth.