Composite panels made of foam core and skin alone have significant limitations in strength and performance, and are difficult to meet the application requirements of complex scenarios. If the structural strength needs to be improved, a support frame can usually be added inside the sandwich panel. This type of frame material can not only effectively enhance the structural strength of the sandwich panel, but also support a larger panel design while reducing the thickness of the panel. Typical applications include various box bodies, such as refrigerated boxes and caravans.
Common Embedded Frame Materials
Timbers
- Advantages: Low cost and easy to obtain; easy to process, strong nail holding power.
- Disadvantages: Poor stability. It is easy to expand and deform when the moisture content is high, and it may crack when dry, resulting in reduced stability of the sandwich panel structure.
Aluminum Alloy Tube
- Advantages: Light weight, high strength, corrosion resistance, long service life, and recyclable.
- Disadvantages: High thermal conductivity, easy to cause thermal bridge problems.
Fiberglass Profiles
- Advantages: High strength, low heat conductivity, waterproof.
- Disadvantages: Low thermal deformation temperature, structural strength decreases in extreme high and low temperature environments.
High-density PVC Board
- Advantages: Lightweight, waterproof, high nail holding force, corrosion resistance.
- Disadvantages: Not resistant to high temperatures, low strength.
Fiberglass Polyurethane Board
- Advantages: High strength, low thermal conductivity, corrosion resistance, strong nail holding power.
- Disadvantages: Not resistant to high and low temperatures.