PU panel is a type of building material made of two layers of metal sheets and a layer of polyurethane foam in between. The metal sheets can be made of steel, aluminum, or other materials, while the polyurethane foam provides insulation and soundproofing properties. PU sandwich panels are commonly used in the construction of walls, roofs, and ceilings for industrial and commercial buildings, as well as for cold storage facilities and clean rooms. They are lightweight, durable, and easy to install, making them a popular choice for construction projects. PU sandwich panel is a type of composite building material made up of a rigid foam core sandwiched between two layers of sheet metal or other materials. The foam core is typically made of polyurethane (PU) foam, which provides excellent thermal insulation and sound absorption properties. The outer layers can be made of a variety of materials, including aluminum, steel, fiberglass, or even wood. PU sandwich panels are commonly used…