Advantages of radiation crosslinked low smoke halogen-free flame retardant wire
Traditional PVC (polyvinyl chloride) wires are easy to decompose and escape a lot of highly toxic and corrosive HCL (hydrogen chloride) gas after being heated in a fire, and produce a lot of highly toxic smoke, which causes great losses to life and property and brings great difficulties to rescue work (such as the subway fire in South Korea). In order to avoid and reduce the fire and the secondary injury caused by fire as much as possible, people have found that changing the outer material and technology used in products can effectively solve the problem after more than ten years of research.
The main characteristics of halogen-free and low-smoke flame-retardant wires and cables are that all materials contain no halogen, and the amount of smoke released during combustion is very small. The halogen-containing cable released in the fire is very toxic. If the toxicity of the gas concentration that can kill people for 30 minutes is judged as 1, the toxicity index of PVC is 15.0 1, while that of halogen-free polymer is 0.79. When there is a fire, the smoke makes the victims unable to tell the direction, thus prolonging their stay in the fire. According to relevant data, when the light transmittance is 70%, the ability of human eyes to distinguish objects and images is only about 5m. However, the light transmittance of smoke emitted by PVC combustion is below 15%, that is, the naked visual distance of people in this thick smoke is only about 2 m, and another feature of thick smoke is that it spreads very quickly with the hot air flow, and the speed can reach more than 20m/min. It can be seen that the use of halogen-free low-smoke wires and cables is very important to ensure safety. —— This section is quoted from Shanghai Engineering Construction DG J08-93-2002J10166-2002) Code for Fire Protection Design of Wires and Cables in Civil Buildings.
Therefore, advanced countries in the world have introduced halogen-free and low-smoke flame retardant materials to replace the same kind of PVC, and formulated relevant standards, which have been fully promoted in civil wires in Europe, America and Japan. China has also formulated corresponding standards, such as GB/T 19666-2005 General Principles of Flame Retardant and Fire-Resistant Wires and Cables and GA306. 1-200 1 Flame Retardant and Fire-Resistant Cables: Classification and Requirements of Plastic Insulated and Fire-Resistant Cables. The Ministry of Machinery Industry has formulated JB/T 1049 1-2004 XLPE insulated wires and cables with rated voltage below 450 V, and Shanghai has formulated the engineering construction specification DG J08-93-2002J10166-2002).
Adhering to the tenet of "science and technology return to society", taking advantage of the company's high-tech advantages and through the innovation of halogen-free and low-smoke flame retardant technology, a new type of high-performance environmental protection wire is introduced. It solves the shortcomings of PVC wire decoration, is halogen-free, low-smoke, flame-retardant, has excellent short-circuit load capacity, and is a wise choice for decoration. We believe that with the improvement of people's living conditions, people pay more and more attention to health, safety and environmental protection, and the day when new high-performance environmental protection cloth wires completely replace traditional PVC wires will be just around the corner.