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| Brand Name: | SEASTAR |
| Model Number: | Customizable according to requirements |
| MOQ: | 20m³ |
| Price: | 238 USD/tons (Current price) |
| Payment Terms: | spot goods and spot payment |
| Supply Ability: | 2000 tons/month |
In passenger-dense public transportation vehicles such as trains, subways, and buses, the fire safety of interior materials is directly related to the lives of passengers and the structural safety of the vehicles. Made from volcanic rocks like basalt and diabase, which are melted at high temperatures and spun into fibers, rock wool boards inherently possess core properties such as non-combustibility, low smoke and toxicity, and high-temperature resistance. They meet strict fire safety standards in the transportation industry, including the European Union’s EN 45545 and China’s GB/T 24430, making them a key material for fire protection in public transport interiors.
Good Performance
Their core fire protection performance is first reflected in their Class A non-combustibility, complying with the GB 8624-2012 standard. When exposed to open flames or high temperatures, they do not burn or produce flames, with a softening temperature exceeding 700°C. This effectively blocks the spread of fires and buys time for the 3-5 minute "golden evacuation window" for passengers. Secondly, over 80% of casualties in public transport fires are caused by toxic smoke. When decomposed at high temperatures, rock wool boards only release small amounts of harmless water vapor and carbon dioxide, without toxic gases like formaldehyde or cyanides, and have a smoke density rating of less than 15, preventing smoke from obscuring vision or hindering breathing. Additionally, they maintain structural integrity at temperatures between 600-800°C without melting or dripping, which slows down the deformation of the vehicle’s metal frame and protects the vehicle structure. They can also be made into various forms by adjusting density (80-150kg/m³) and thickness (5-50mm), with their surfaces able to be compounded with protective layers to balance interior needs such as light weight and easy processing.
Applications
For trains, the interlayers of the carriage side walls and ceiling are filled with low-density rock wool boards (80-100kg/m³ in density) that are 5-10mm thick, with fire-resistant panels laminated on the outer layer. This not only blocks the spread of flames but also reduces noise from wheel friction, keeping the interior noise of high-speed EMUs below 65 decibels. Rigid rock wool boards (3-5mm thick) are placed inside the backrests and seat cushions of train seats to prevent cigarette butts from igniting the internal sponge filling. High-density rock wool boards (120-150kg/m³ in density, 10-15mm thick), with aluminum foil laminated on the surface, are attached to the electrical cabinets and equipment compartments at the bottom of the train to insulate heat from the equipment and block fires caused by short circuits.
Subways operate in enclosed tunnels, so the application of rock wool boards here focuses on low smoke toxicity and moisture resistance. The interlayers of subway carriage floors are paved with hydrophobic rock wool boards (8-12mm thick, 100-120kg/m³ in density, with a hydrophobic rate of ≥98%), which block the spread of fires from under the floor and prevent the filling layer from mold growth due to tunnel moisture. Strip-shaped rock wool sealing strips are inserted into the gaps of subway doors and windows; these expand to seal gaps during fires, preventing flame spread between carriages. The interior of interval fire doors in tunnels is filled with 20-30mm thick rock wool boards, forming a fire barrier system with a 3-hour fire resistance rating to stop the spread of fires.
Bus interiors are compact with limited escape routes, so rock wool boards used here must balance light weight and aging resistance. Lightweight rock wool boards (80-90kg/m³ in density, 5-8mm thick, weighing 1.2-1.4kg/m²) are attached under the interior panels of bus side walls and ceilings. These prevent flames from burning through the body in case of fire caused by collisions and reduce heat from summer sun exposure entering the carriage. Rigid rock wool boards (10mm thick) are used as partitions in the underfloor luggage compartments and on-board storage compartments to block the spread of fires from luggage. Rock wool blankets (3-5mm thick) are pasted on the inner walls of air conditioning and heating ducts to prevent fires in the duct system and reduce cold/heat loss.
| Comparison Items | Rock Wool Board | Polystyrene Board (EPS/XPS) | Polyurethane Board (PU) | Glass Wool Board | Aerated Concrete Block |
|---|---|---|---|---|---|
| Combustion Performance | Class A non-combustible (highest grade) | Class B1-B2 (flame-retardant-combustible) | Class B1 (flame-retardant, toxic fumes released at high temperatures) | Class A non-combustible | Class A non-combustible |
| Thermal Conductivity (W/(m*K)) | 0.036-0.048 | 0.030-0.040 (EPS); 0.028-0.032 (XPS) | 0.022-0.028 | 0.035-0.045 | 0.16-0.28 |
| Insulation Performance | Good | Excellent (XPS better than EPS) | Superior (best insulation effect) | Good | Average |
| Sound Insulation Performance | Excellent (fiber structure blocks air and solid sound transmission) | Average (low density, weak in blocking low-frequency noise) | Good (closed-cell structure, slightly better than polystyrene) | Good (fiber structure, mainly sound absorption) | Good (porous structure, moderate sound insulation) |
| Mechanical Strength | Compressive strength ≥40kPa, good toughness | EPS compressive strength ≥100kPa; XPS ≥200kPa | Compressive strength ≥200kPa, high hardness | Low compressive strength (≤30kPa), easy to break | Compressive strength ≥3.5MPa, high strength |
| Temperature Resistance Range | -268℃ to 650℃ (high-temperature resistant) | -50℃ to 70℃ (easy to deform at high temperatures) | -50℃ to 120℃ (easy to age beyond this range) | -120℃ to 400℃ | -50℃ to 600℃ (high-temperature resistant) |
| Weather Resistance | Moisture-resistant, anti-aging, adaptable to multiple climates | EPS absorbs water easily; XPS shrinks at high temperatures | Vulnerable to UV rays (needs protective layer), average water resistance | Poor water resistance (insulation drops when wet) | Moisture-resistant, good frost resistance |
| Environmental Friendliness | Made from natural rocks, formaldehyde-free, recyclable | Organic material, some contain flame retardants, hard to degrade | Contains isocyanates, emission control required during production | Glass fibers may irritate skin, average recyclability | Inorganic material, non-toxic, recyclable |
| Key Advantages |
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| Typical Applications | External wall insulation, fire barriers, industrial pipeline insulation | Internal building insulation, low-temperature storage, packaging cushioning | High-end building insulation, cold storage insulation, pipeline insulation | Concert halls, machine room soundproofing, ceiling filling | Wall masonry, self-insulating buildings |
