Self-adhesive films, as three-layer co-extruded adhesive films, rely on SEBS or SEPS containing diblock segments as the base material for the adhesive layer to achieve environmental friendliness, easy adhesion and removal, and residue-free characteristics. Due to differences in molecular structure (partially hydrogenated / fully hydrogenated) and polarity characteristics, the two are suitable for different scenarios while covering the vast majority of common protection needs.