In modern buildings and public facilities,the safety performance of cables is directly related to the protection of human life and property.Low smoke halogen-free fire-resistant cable,as a new type of high-performance cable,has gradually become the preferred material in the field of power transmission due to its unique material characteristics and safety advantages.

 

　　What is low smoke halogen-free fire-resistant cable?

 

　　The insulation layer and sheath of low smoke halogen-free fire-resistant cables are made of environmentally friendly materials that do not contain halogens(such as chlorine and bromine).Common substrates include cross-linked polyethylene(XLPE)or polyolefin compounds.Its core characteristics are reflected in two aspects:first,the concentration of smoke released during combustion is extremely low,and the light transmittance is high;Secondly,during the combustion process,toxic and corrosive substances such as halogen acid gases(such as hydrogen chloride and hydrogen bromide)are not produced.At the same time,these types of cables usually have excellent fire resistance and can maintain normal power supply for a certain period of time under high temperature or open flame,buying time for emergency evacuation and rescue in case of fire.

 

　　Environmentally friendly and non-toxic

 

　　Traditional halogen containing cables release a large amount of black smoke and toxic gases when burned,which not only obstruct the escape line of sight,but also cause secondary damage to the human respiratory tract and equipment.Low smoke halogen-free cables only produce a small amount of white smoke at high temperatures,and the smoke toxicity is low,meeting environmental standards such as EU RoHS,making them suitable for places with strict air quality requirements.

 

　　High fire resistance

 

　　By adding flame retardants such as metal hydroxides,this type of cable can form a barrier layer when encountering open flames,delay the spread of flames,and maintain the integrity of the circuit for more than 90 minutes in high temperatures above 750℃(specific time varies depending on the standard),ensuring the continuous operation of key equipment such as fire protection systems and emergency lighting.

 

　　Aging resistance and stability

 

　　Halogen free materials have strong oxidation resistance,are not easily brittle after long-term use,outstanding oil and chemical corrosion resistance,and are suitable for complex environments.Meanwhile,its insulation performance is stable,which can reduce the risk of short circuit.

 

　　Meets rigorous standards

 

　　Low smoke halogen-free cables must pass international or national flame retardant,smoke density,and toxicity tests such as IEC 60332 and GB/T 19666,and their safety has been verified through multiple verifications.

 

　　Widely applicable scenarios

 

　　Densely populated areas

 

　　Public areas such as subways,airports,hospitals,and shopping malls have extremely high requirements for fire safety,and low smoke and halogen-free cables can minimize secondary hazards during fires.

 

　　High rise buildings and underground facilities

 

　　Once a fire breaks out in enclosed spaces such as vertical shafts and underground parking lots in high-rise buildings,smoke is not easily dispersed.The use of such cables can improve the success rate of evacuation.

 

　　Industrial and energy sectors

 

　　In environments such as petrochemicals and nuclear power plants with high temperature or flammable and explosive risks,cables need to have both fire and corrosion resistance capabilities.

 

　　Communication and Data Systems

 

　　The equipment value in data centers,computer rooms,and other places is high,and it is necessary to avoid toxic gases from corroding precision instruments.Low smoke and halogen-free cables have become an ideal choice.

 

　　Future Trends

 

　　With the global emphasis on fire safety and the improvement of environmental regulations,low smoke and halogen-free fire-resistant cables are gradually replacing traditional PVC cables.It not only reflects technological progress,but also represents society's respect for life safety and pursuit of sustainable development.In emerging fields such as smart cities and green buildings,the application of such cables will further expand and become the"invisible guardians"of modern infrastructure.