Cold storage panels are generally classified according to materials. Commonly used materials are polyethylene and polystyrene. In addition to these two materials, there are also polyurethane sandwich panels with very good performance. Polystyrene cold storage panels are not enough for insulation because the density of insulation materials is relatively thin. Therefore, special equipment is generally used inside, and polyethylene is better, and the thermal insulation effect is relatively high. Polyurethane cold storage board has the advantages of corrosion resistance, anti-aging, flame retardant, non-toxic, light weight and low price, strong pressure resistance, etc., of course The good thing is the polyurethane cold storage board, of course the price is relatively high. However, polyurethane cold storage panels have won a very wide range of use in the cold storage industry due to their excellent thermal insulation properties.