High temperature hot melt coated iron needs special functional film, which is generally three-layer structure: the first layer is the bonding layer combined with the substrate, the middle layer is the framework support layer, which has barrier performance, and the third layer is the functional structure layer, which is the barrier layer and printing layer of the film. At the same time, it has good mechanical strength, can resist friction and scratch, and in some cases needs to have low surface energy It is one of the core technologies of coated iron products that structural design and composition modification should be carried out according to different application environment and process requirements. The typical structure is shown in the figure below

According to the different application needs of coated iron, Shanghai Legion has developed a series of special functional films for different purposes.