In high-performance metal-faced sandwich panel production, Rock Wool Lamella strips and Irregular (Shaped) Strips together form a complete core insulation system. The Lamella strips, with vertically oriented fibers, deliver primary compressive and tensile strength for the flat areas of the panel. The precision-cut, irregularly shaped strips are designed to fully fill the corrugated ribs of the metal facings.
This combination ensures a continuous, gap-free core with excellent structural support, thermal performance, and Class A1 fire resistance, meeting stringent industrial and architectural requirements.
| Product Performance | LL-RWL-03 | Unit | Standard |
|---|---|---|---|
| Compressive strength | ≥80 | kPa | GB/T 13480 |
| Tensile strength | ≥150 | kPa | GB/T 30804 |
| Thermal conductivity (25°C) | ≤0.043 | W/(m·k) | GB/T 10294 |
| Combustion performance | Class A | — | GB 8624-2012 |
| Acidity coefficient | ≥1.8 | — | GB/T 5480 |
| Hydrophobic rate | ≥99 | % | GB/T 10299 |
| Mass moisture absorption rate | ≤1.0 | % | GB/T 5480 |
| Water absorption (Partial Immersion) Short term (24h) | ≤0.5 | kg/m² | GB/T 30805 |
| Water absorption (Partial Immersion) Long term (28d) | ≤2.0 | kg/m² | GB/T 30807 |
| Noise reduction coefficient (NRC) | ≥0.6 | — | GB/T 18696.1 |
| Dimensional stability | ≤1.0 | % | GB/T 30806 |
| Melting temperature | ≥1000 | °C | — |
| Thickness tolerance | ±1 | mm | GB/T 5480 |
| Right-angle degree of deviation | ≤5 | mm/m | GB/T 5480 |
| Flatness tolerance | ≤2.0 | mm | GB/T 25975-2018 |
By using Rock Wool Lamella as the main core, the panel benefits from vertical fiber orientation. These fibers act as "micro-columns" perpendicular to the metal skins, providing exceptional compressive strength and load-bearing capacity, ensuring the panel remains flat and rigid even under heavy snow or wind loads.
Irregular (Shaped) Strips are custom-cut to match the specific profile (trapezoidal or wavy) of the metal ribs. This precision fit ensures that every void is filled, eliminating the air pockets that cause "cold bridges" and preventing internal condensation that could lead to metal corrosion.
The combination of flat lamella and shaped strips maximizes the contact surface area between the rock wool and the metal skin. When combined with high-quality adhesives, this integrated system provides superior tensile strength, making the panels highly resistant to delamination (peeling) caused by wind suction or extreme temperature fluctuations.
Classified as Class A1 non-combustible, this integrated rock wool core can withstand temperatures over 1000°C. By using irregular strips to fill the corrugated ribs, the system eliminates hollow channels within the panel, preventing the "chimney effect" where fire and smoke could otherwise spread rapidly through the gaps in the metal profile.
The high-density mineral wool core effectively dampens vibrations and "rain noise" on large metal roofs. The seamless fit of the lamella and shaped strips ensures a consistent Thermal Conductivity (0.034-0.040W/（m·K）) across the entire panel surface, significantly reducing energy costs for the building.
*Technical Selection Guide
Not sure which core material fits your project?
For standard thermal insulation and manual assembly, explore our [Rock Wool Board for Sandwich Panels].
For high-load-bearing requirements and automated lines, our [Rock Wool Lamella Strips] are the optimal choice.
About Us
FAQ
1. Who are we?3. Why use Rock Wool Lamella instead of standard boards in sandwich panels?
Lamella provides vertical fiber orientation, which increases the compressive strength of the panel by up to 5 times compared to horizontal fiber boards.
4. What is the ideal density for sandwich panel lamellas?
For structural integrity, a density of 100k -140k is recommended to achieve the best balance of insulation and strength.
