Overview
Fireproof rock wool slotted board is an advanced insulation material made from basalt rock and slag, processed into dense fibrous panels with integrated slots or grooves. These slots enhance installation efficiency by allowing secure placement of reinforcement wires or fasteners. The material is widely recognized in construction for its dual functionality as both a thermal insulator and fire barrier. As a non-combustible material, it meets stringent fire safety standards, making it indispensable in commercial buildings, industrial facilities, and high-risk areas. The slotted design differentiates it from standard rock wool boards, offering improved structural integration in wall assemblies and ceiling systems.
Physical and Chemical Properties
The board exhibits exceptional thermal stability, withstanding temperatures exceeding 1000°C without melting or releasing toxic fumes. Its fibrous structure traps air pockets, providing thermal conductivity values of 0.035-0.042 W/(m·K), comparable to premium insulation materials. The density ranges from 80-200 kg/m³, balancing mechanical strength and weight. Chemically, rock wool is inert and resistant to most solvents, acids, and alkalis. It maintains dimensional stability under humidity fluctuations and demonstrates excellent sound absorption properties (NRC 0.75-1.0). The slots are precision-cut to accommodate standard construction reinforcement systems without compromising the material's integrity.
Main Applications
Primary use cases include fire-rated wall and ceiling assemblies in high-rise buildings, where the slotted design facilitates quick installation of firestop systems. It's specified in HVAC duct insulation due to its resistance to airflow erosion and compliance with smoke development indices (SDI <450). Industrial applications include insulation for boilers, pipelines, and electrical conduits where fire protection is critical. The boards are also used in shipbuilding and offshore platforms, leveraging their moisture resistance and Class A fire ratings. In retrofit projects, the slotted version simplifies upgrades to existing structures by integrating with current framing systems.
Safety and Storage
While non-toxic, handling requires NIOSH-approved respirators to prevent inhalation of airborne fibers during cutting. Installers should wear gloves and long-sleeved clothing to minimize skin contact, which may cause temporary irritation. Workspaces need adequate ventilation during fabrication. Storage mandates protection from rain and prolonged UV exposure to prevent surface degradation. Pallets should be stacked horizontally on level surfaces, with maximum stack heights per manufacturer guidelines (typically ≤2.5m). Damaged boards with compromised slots or torn facings should be discarded, as these defects impair fire performance.
B2B Procurement Guide
When sourcing, prioritize suppliers with ISO 9001 certification and ask for batch-specific fire test reports (e.g., EN 13501-1 Class A1). Key specifications to confirm include slot dimensions (commonly 20-30mm width), edge reinforcement, and facing materials (kraft paper or foil are standard). For large projects, request factory audits to verify production consistency. Lead times vary from 2-6 weeks depending on customization needs. Container loading efficiency is approximately 80-120 m² per 20ft container for standard 50mm boards. Consider MOQs (typically 500-1000 m²) and negotiate bulk discounts for orders exceeding 10,000 m².
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