Halogen

The most commonly occurring halogens in cable compounds are fluorine, chlorine and bromine. Polymers or additives containing these elements can impart desirable flame retardant properties. Halogens are an inherent part of halogenated polymers by being included into the polymer composition on a molecular scale. Additives containing halogens can be incorporated into both halogenated and non-halogenated polymers to enhance flame retardant properties. The potential for some halogenated materials to release acidic gasses and/or high levels of smoke in a fire situation should be balanced against flammability requirements as measured by an appropriate flammability test. Typical halogenated polymers used in wire and cable applications are polyvinyl chloride (PVC), chlorinated polyethylene (CPE), chlorsulfonated polyethylene (CSPE), and fluoropolymers.