PU (polyurethane) foam is a core material with excellent thermal insulation performance, so PU sandwich panels are the first choice for many box builders to build thermal insulation boxes. As a professional flat sandwich panel manufacturer, TOPOLOGROUP relies on rich manufacturing experience, advanced production equipment and excellent technology to customize PU sandwich panels for enterprises and individuals around the world. These panels have shown reliability and stability in local engineering projects.
Specifications
| Standard Structure | Inner facing ＋ PU core ＋ Outer facing. |
| Facing | FRP (Glass Fiber Reinforced Plastic). CFRT (Continuous fiber reinforced thermoplastic). Aluminum sheet. Pre-painted steel sheet. |
| Core | PU (Polyurethane) foam. (Density: 28-50kg/m³) |
| Composite Method | Adhesive. |
| Thickness | 10-150mm. |
| Length | ≤12000mm. |
| Width | ≤3200mm. |
PU sandwich panels are made by spray adhesive technology
In this process, adhesive is sprayed on the skin and core materials, and then pressure is applied to bond them together in a vacuum and high-pressure environment. Spray adhesive sandwich panels offer several advantages, especially when compared to other sandwich panel manufacturing methods. Using spray adhesive is a flexible, efficient and affordable solution in many applications.
PU (polyurethane) Foam Core
The PU foam core has extremely low thermal conductivity and water absorption due to its unique closed-cell cell structure.
- Density: 28-50 kg/m³.
- Thermal Conductivity: 0.020-0.030 W/m·K.
- Compression Strength: 200-600 kPa.
- Water Absorption: < 1%.
- Hardness: 25-70 Shore A.
- Bending Strength: 200-500 kPa.
Surface Materials
When designing PU sandwich panels, a wide variety of surface materials can be taken into account. Relying on high-performance adhesives, polyurethane foam cores can be used with different surface materials, such as metal (aluminum, steel), plastic (FRP, CFRT), so that makes the final panel meet different application requirements. If you require unique surface materials to be applied to PU sandwich panels, we will custom make these panels for you.
“Skeleton” materials are embedded inside to enhance the structural strength of the panel.
A set of evenly distributed “skeletons” made of wood, steel pipes, aluminum profiles or high-strength plastics are embedded inside the PU sandwich panel. In order to ensure the lightweight of the panel, our engineers carefully designed the structure to reasonably balance the strength and weight of the panel.
High-precision CNC processes sandwich panels with complex shapes
Rely on computer numerical control processing to achieve precise and fast cutting, drilling, milling, engraving and other operations on PU foam sandwich panels to ensure the dimensional consistency of large batches of panels.
- The size deviation is within 1mm.
- The thickness deviation is within 0.1mm.
New Composite Facing for PU Sandwich Panels
Continuous fiber reinforced thermoplastic – CFRT, a new type of FRP composite material, is lighter, more durable and affordable. It is increasingly replacing thermosetting FRP and aluminum as the skin material of sandwich panels, especially in refrigerated truck bodies.
Common Application of PU Sandwich Panels
Truck Bodies
Used in the bodies of refrigerated trucks and insulated trucks, etc., to help maintain a low temperature environment and ensure the transportation and storage of perishable items.
Buildings
Used as exterior wall panels, roof panels and interior wall panels, especially suitable for buildings that require insulation, such as cold storage, refrigerated warehouses, offices and commercial buildings.
Agricultural Greenhouses
Used in greenhouses and agricultural buildings, it provides excellent thermal insulation performance, helps regulate indoor temperature and prolongs the crop growing season.
Industrial Facilities
Used in the shell of industrial equipment, providing insulation and waterproofing functions.
Learn More
To learn more about PU sandwich panels and get relevant solutions, please contact us. In addition, we also provide XPS, PET, and PVC foam sandwich panels.