Rock wool boards are widely used in construction due to their excellent fireproof, thermal insulation, and waterproof properties. As a composite material made from natural ores like basalt, it is melted at high temperatures, spun into fibers, and then combined with binders before being solidified. This makes rock wool board an essential building material in modern construction projects. It plays a crucial role in providing thermal and acoustic insulation for buildings, ships, and industrial equipment.
The application of rock wool boards extends to various industries, including power generation, petroleum, metallurgy, and shipbuilding. They are particularly effective for insulating small-diameter pipes and are ideal for environments where moisture resistance is critical. The waterproof version of rock wool board contains special additives that reduce moisture absorption to below 5% and increase water repellency to over 98%, making it suitable for use in rainy or humid areas.
In marine applications, rock wool boards are used for thermal insulation and fireproof partitions, while hydrophobic versions are used in vehicles, cold storage, HVAC systems, and other environments where moisture control is necessary. These boards are also used in buildings for wall and roof insulation, as well as for soundproofing and fire protection in partitions, firewalls, doors, and elevator shafts.
Standard dimensions include 1000×630 mm with thickness ranging from 30 to 100 mm, and custom sizes can be produced based on specific requirements. The density ranges from 60 to 150 kg/m³, offering flexibility for different applications.
Rock wool insulation boards have gained significant attention due to their advanced fire-resistant properties. Unlike traditional foams, they do not drip when exposed to fire and exhibit excellent thermal stability. Made primarily from phenolic resin, these boards are reinforced with curing agents and foaming agents. During the curing process, the resin cross-links and expands, forming a stable structure.
Phenolic resin-based rock wool boards have a unique molecular structure with phenol rings connected by methylene bridges, which provide exceptional heat resistance. They can withstand long-term exposure up to 150°C and short-term exposure above 200–300°C. Their thermal stability is superior to most other foam materials.
In terms of flame resistance, these boards have an oxygen index of 50, meeting the B1 flame retardant standard without the need for additional flame retardants. High-density versions with inorganic fillers can achieve an oxygen index of up to 70, meeting the German DIN4102 A2 non-combustible classification.
When exposed to fire, rock wool boards form a carbonized layer on the surface, known as “graphite foam,†which prevents further damage and retains the internal structure. This property makes them highly resistant to flame penetration and ensures safety in critical applications.
Overall, rock wool insulation boards are a versatile and reliable choice for construction and industrial projects where fire safety, thermal efficiency, and moisture resistance are essential.
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