Present situation and prospect of low smoke zero halogen flame retardant cable

In the 70 s, people from the electrical fire accident, realize the importance of wire and cable fire retardant, international began in-depth study on the mechanism of flame retardant, and produce a true have two set the properties of flame retardant wire and cable, gradually developed a variety of flame retardant test method and test specification. But when development is containing halogen flame retardant cable, burning smoke atmosphere can be created toxic and corrosive gas, still can cause secondary disasters.

 

In the late 70 s and early 80 s, people began to develop better performance of the "clean, low smoke zero halogen flame retardant cable. At the 1980 international wire and cable for discussion meeting, has demonstrated the thermoplastic high halogen-free flame retardant materials (oxygen index for 46-50), the material in the fire does not drip, and little smoke release. By the end of 1980, low smoke zero halogen flame retardant abroad communication cable has been used in practice.

 

Our country since the late 70 s, with the development of economy and electrical fire accident occurred frequently, to the development of flame retardant cable and use has attracted attention. In the 80 s, the cable factory in suzhou, hangzhou cable factory, Shanghai cable factory, shenyang cable factory, cable factory, xiangtan cable factory, wuxi cable factory in sichuan first to produce flame retardant insulation wire, etc. So far, the domestic small and medium-sized wire cable factory can produce general flame retardant wire and cable products. With the improvement of understanding of safety and reliability, the flame retardant properties of the products are many wire and cable users requirements are put forward. For example, the coal ministry has expressly flame retardant cable must be used in coal mine; Subway, nuclear power plants, chemical and other special departments and occasions requiring the use of low smoke zero halogen flame retardant cable.

 

In recent years, our country continues to research and development of the low smoke zero halogen flame retardant cables, low smoke zero halogen flame retardant cable development has been included in the national wire and cable, optical cable guide new product development. In the development and application of halogen free flame retardants have a lot of progress, has developed and produced many inorganic flame retardants, including hydration alumina, antimony oxide, thick, platinum, inorganic phosphorus, as well as the transition metals such as zinc, magnesium oxide, hydroxide or carbonate, etc., among them

 

A1 (OH) 2 flame retardant has formed SR109 SR115 series, 7 varieties. Some cable material factory has now developed low smoke zero halogen resistance fuel. In 1991, hebei xingtai cable factory manufacture low smoke zero halogen flame retardant cable, through the identification of Beijing wire factory is successfully developed low smoke zero halogen flame retardant fire-resistant cable. In January 1992, developed by Shanghai cable factory worker kV low smoke zero halogen crosslinked polyethylene interlocking kai new flame retardant cable via through appraisal, and won the national patent; At the same time, the factory also developed the ethylene-propylene insulation halogen-free flame retardant cable. In addition, like wuxi cable factory, cable factory, cable factory in chengdu, sichuan cable factory in shenyang, tianjin cable factory cable factory, Harbin, zhengzhou cable factory and so on all have the research and development of low smoke zero halogen cable work. Working to develop products at the same time, shenyang cable factory, Shanghai cable factory, xiangtan cable factory, zhengzhou cable factory, tianshui cable factory, Yellowstone cable factory, bao sheng cable factory are successively established conform to the requirements of the standard, reach the advanced level of combustion laboratory and smoke concentration measurement system, perfected the electric wire electric cable flame retardant performance testing methods. Shanghai electric wire electric cable testing station in 1991 was approved as IEaEE - OGB submitting lab, for low smoke zero halogen flame retardant cable product performance in China created the conditions for detection and identification.