The solution for flexible packaging: oxygen barrier coating-has good durability on polyolefin substrate, and the oxygen barrier effect can reach 1cc/m²/day. Heat seal coating-low heat initiation temperature and excellent heat seal strength, extrusion composite primer-can strengthen the adhesion between film, aluminum foil, paper and other substrates and extruded resins (such as polyethylene and specialty polymers) Strength, varnish-improve the gloss and waterproof of the surface.