The color steel sandwich plate is composed of two layers of color coated steel plate as the panel and the core material, such as polystyrene, polyurethane, phenolic foam, rock wool, and so on. In the special automatic production line, the core material and the panel are combined into the whole building plate by continuous forming process, commonly known as the "sandwich plate". Although this kind of composite plate has been introduced in our country for less than 20 years, it has been widely recognized and used in building clean room because of its advantages of bearing, thermal insulation, decoration, waterproof, simple construction and so on. It has challenged the traditional building materials such as brick and stone and became a new army in building materials industry. .

The core material of color steel sandwich panel can be divided into two categories according to the chemical composition of its products, that is, organic chemical foam materials such as polystyrene foam EPS, polyurethane foam PU, extruded polystyrene foam XPS, phenolic foam PF and so on. The other kind are inorganic fiber materials, such as rock wool board and foamed cement plate.

1, polyurethane foam color steel sandwich panel PU

Polyurethane foam color steel sandwich panels are made of flame retardant rigid polyurethane foam core and color coated steel sheet. At present, hard polyurethane sandwich panels are widely used in industrial buildings, warehouses, stadiums, civil houses, villas, active houses, combined cold storage and other buildings, but the shortcomings are under the conditions of high temperature and strong alkali, high demand for equipment, large initial investment, and difficult industrialization.

2. Polystyrene foam color steel sandwich panel EPS

Polystyrene is the white foam that we often see. This kind of color steel plate is cheap, water resistant, not deformed. Most of the active rooms on the site are built with polystyrene sandwich panels. The polystyrene foam sandwich plate is not fireproof, and the thermal insulation effect is the worst.

3, phenolic foam color steel sandwich panel PF

Phenolic foam color steel sandwich panels are made of colored steel sheets and phenolic foam as core material. Phenolic foam is brittle, brittle and corrosive. The residual acid in the foam has corrosion effect on metal materials.

4, rock wool color steel sandwich plate

Rock wool color steel sandwich panels have better fireproof performance, but the rock wool color steel plate is not waterproof, which produces toxic substances and pollute greatly when exposed to fire.

5, paper honeycomb color steel sandwich panels

Paper honeycomb sandwich panels can be recycled and recycled completely. It is a replacement product of polystyrene board, polyurethane, rock wool and other materials. It is widely used in the clean engineering fields such as electronics, hospital operation room, laboratory and so on, but the waterproof effect is poor and the price is more expensive.

6, aluminum peak nest sandwich plate

Aluminum honeycomb sandwich steel sandwich plate is made of aluminum honeycomb core, combined with special high strength glue and color plate, and supported by special aluminum alloy keel after heating, pressurizing and curing. Compared with other sandwich panels, it has light weight and good flatness. It belongs to green environmental protection building materials, but the cost is the highest.