Product Description

It is usually composed of three materials: "outer panel + sandwich material + inner panel", so it is called a sandwich body structure.

First of all, as a body structure, there must be a skeleton, use wooden materials to build the ground and interior walls, use welding to connect the wall parts and the chassis, and weld the entire body structure, so as to avoid excessive tire pressure of the RV and rock bumps and "creaking" "the sound of.

Then there is the interlayer in the middle, which plays the role of heat preservation and sound insulation, and is generally filled with polystyrene foam boards. The insulation effect of the insulation material is very important, but the hardness of the insulation material is also very important. Trailers can also sometimes have water leakage issues, such as when the exterior wall material is aging and rainwater seeps into the insulation. XPS (extruded polystyrene) and PU (polyurethane) composites are stiffer than single EPS (polystyrene) foam.