Fire destroys cheap buildings. You must match the panel core material to the exact thermal and fire codes.As a verified high density insulated wall cladding supplier, Hihsteel consolidates production from the top OEM factories. Here is the absolute performance truth for insulated sandwich panel systems.
Physical & Fire Performance Comparison
Compare thermal conductivity pur vs rock wool directly. PUR and PIR dominate thermal insulation. Rock wool dominates fire survival.
| 性能参数 (Property) | PUR 聚氨酯 | PIR 聚异氰脲酸酯 | 结构级高密岩棉 (Rock Wool) |
| 芯材容重 (Density, ρ) | 40 ~ 45 kg/m³ | 42 ~ 45 kg/m³ | 120 ~ 130 kg/m³ |
| 导热系数 (Conductivity, λ) | 0.024 W/m·K | 0.022 W/m·K (Best) | 0.034 W/m·K |
| 闭孔率 (Closed Cell) | ≥ 90% | ≥ 95% | 开孔纤维结构 |
| 防火安全等级 (Fire Rating) | 国标 B2 级 | 国标 B1 级 (难燃) | 国标 A1 级 (绝对不燃) |
| 耐火极限 (Fire Resistance) | 约 15 分钟 mins | 30 ~ 60 分钟 mins | 1 ~ 4 小时 (60 to 240 mins) |
Core Selection Logic
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PIR (Polyisocyanurate): The ultimate cold chain and cleanroom solution. The 0.022 W/m·K thermal conductivity crushes energy bills. We operate as a direct pir sandwich wall panel manufacturer source for these precision materials.
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Rock Wool: The absolute fire barrier. Chemical plants and battery factories demand this. It achieves a Class A1 non-combustible rating. We source directly from a heavy-duty rock wool insulated wall panel factory to guarantee the massive 120 kg/m³ structural density.
Architectural Profiles & Weight Calculations
Industrial aesthetics matter. We supply three distinct exterior skin profiles: Flat Stucco-Embossed (Part 902254), Fineline (902255), and Micro-Rib (902256). Massive density means massive weight. You must calculate the dead load for your structural frame. 50mm PU weighs 13.5 kg/m. 50mm Rock wool jumps to 16.68 kg/m (902567). 80mm Rock wool hits 20.28 kg/m (902573).
Apply this exact formula for custom widths:
Panel Weight (kg/m) = Standard Weight (1000mm) · [Actual Width W / 1000]
Any fire rated sandwich panel for industrial buildings must be engineered for both the fire inspector and the structural engineer.