The halogen-free material is a material that does not contain a group of halogen elements (fluorine, chlorine, bromine, iodine, and astat). These fire elements release substances that are toxic to humans in the form of toxic fumes but also cause corrosion of metals. Halogen-free plastics are safer, and products from them are particularly convenient to collection and escape routes (public spaces, railway stations, theaters, cinemas, shopping centers, etc.). PVC or polyvinyl chloride is not a halogen-free material because it contains chlorine.