Fire-Resistant Black Wool Board: The "Invisible Shield" for Building Safety?

(1) Class A Non-Combustibility: How Is the Core Performance of Fire-Resistant Black Wool Board Ensured?
Fire-resistant black wool board is made from natural minerals such as basalt, which are melted at temperatures above 1450°C and transformed into fibers via centrifugal spinning. These fibers are then bonded with thermosetting resin to form boards. Its Class A non-combustibility stems from the inorganic nature of the material—its melting point exceeds 1000°C, and it does not produce molten droplets or release toxic gases during combustion. With a thermal conductivity as low as 0.034 W/(m·K), it effectively blocks heat transfer. For example, Rockwool's CL-H128 universal fire-resistant black wool board, when tested under a standard fire source, reduced the temperature rise on the backside by 40% compared to ordinary rock wool at 1000°C, providing reliable passive fire protection for buildings.

(2) Fire Resistance Limit: How Does Fire-Resistant Black Wool Board Achieve Long-Term Flame Retardation?
The fire resistance of the board depends on fiber length and structural density. Long fibers (≥50 mm) interlock to form a three-dimensional network structure, and when combined with a low-porosity design, the board can withstand sustained high temperatures of 2–4 hours without collapsing. Experimental data show that a 50 mm thick board, under 1000°C flame impact, exhibits a thermal shrinkage rate of less than 2% and a backside temperature rise controlled within 180°C, far exceeding the fire resistance requirements for firewalls specified in the "Code for Fire Protection Design of Buildings." Langfang Shujun's 2-hour fire-resistant black wool board has been certified by the National Center for Quality Supervision and Testing of Fireproof Building Materials and is widely used for fire sealing in high-rise building curtain walls.

(3) Multi-Scenario Applications: How Does Fire-Resistant Black Wool Board Adapt to Different Needs?
In the construction field, it can serve as an external wall insulation layer, fire door filler, and pipeline wrapping. For example, Huaneng Zhongtian's high-density black wool board is used in chemical project boiler insulation, withstanding temperatures up to 650°C. In industrial settings, its acid and alkali resistance and anti-corrosion properties make it suitable for equipment insulation in the power and metallurgy industries. Additionally, its non-toxic and smoke-free characteristics comply with green building standards, and no secondary treatment is required after installation, reducing overall costs by more than 20% compared to traditional fireproof materials. With increasing fire safety requirements for high-rise buildings, market demand is growing at an average annual rate of 15%, and technological advancements are focused on improving fiber toughness and reducing water absorption.