LSZH has been widely applicated in cable jackets,specially when the fiber optic cable been installed indoor or some specially environment.
What are halogens and why are they dangerous?
Halogens are a group of highly reactive elements including fluorine, chlorine, bromine, iodine and astatine. When products containing halogens are burned, they produce very dangerous gasses. Public awareness of these dangers began after several tragic fires claimed the lives of victims who inhaled deadly halogenated fumes.
Several fires, including those at the Beverley Hills Supper Club, London’s Kings Cross Underground Station and Germany’s Düsseldorf Airport, have lead to important changes that significantly limit where cables containing halogens may be used. Many organizations, local authorities and governments have undertaken broad initiatives to eliminate the production of halogenated material. In Asia, the United Kingdom and many European communities, the use of wire and cable containing halogens is highly regulated, and in some areas completely prohibited.
These halogenated gasses are dangerous because when in contact with water they immediately form acid. The chlorine from PVC makes hydrochloric acid and the fluorine from Teflon makes hydrofluoric acid, both of which are among the strongest and most corrosive acids. The water source that the gasses use to form these acids can be found almost anywhere-moisture in the eyes, throat and lungs of individuals with whom it comes in contact, as well as fire sprinkler systems and even humidity in the air.
Fires involving the combustion of halogenated materials can be devastating. Inhalation of dangerous fumes can cause serious harm or even death to humans. Acid rain and fumes can quickly destroy expensive industrial and computer equipment.
Cables containing halogens also produce significantly higher levels of carbon monoxide (CO) gas during combustion. Emission levels of this dangerous and potentially lethal gas are reduced by as much as 360% in non-halogenated cable constructions.
Low Smoke = Increased Safety
When halogenated materials burn it produces thousands of tiny particles consisting of gas, soot and chemical residue. This combination of byproducts is what is seen as smoke. Cable manufactured with non-halogenated material produces far less residue when burned. Less residue also means less smoke.
Post time: Dec-04-2019