Sandwich Panel is made of two layers of metal panels and the middle layer of polymer insulated inner core. It is widely used in large industrial workshops, warehouses, gymnasiums, supermarkets, hospitals, refrigerators, activity rooms, building plus floors, clean workshops and places requiring thermal insulation and fire protection. The sandwich panel is beautiful in appearance, bright in color and good in overall effect. It integrates load-bearing, heat preservation, fire prevention and water-proof, and does not need secondary decoration. It is an efficient environmental protection building material with wide use and great potential.