EPS sandwich panels, also known as EPS foam sandwich panels or EPS insulation boards, are superior thermal insulation materials made from expandable polystyrene (EPS) granules through a series of processes including pre-expansion, maturing, molding, drying, and cutting. They consist of color-coated steel sheets (such as galvanized steel, stainless steel, and anti-static color-coated steel) as the outer layers, and self-extinguishing polystyrene (EPS) as the core material. The panels are heated and pressed under a continuous forming machine using heat-setting adhesives to achieve a composite structure.