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Time: 2017-02-17

A fire broke out on a bus in yinchuan, ningxia province at about 7 am on January 5. As of press time, 17 people were killed and 32 injured in the accident. The fire was started by arson and the suspect has been arrested. According to incomplete statistics, in the two years from 2014 to 2015 alone, there were as many as nine fatal accidents caused by fires on buses and coaches.

Zhou zhengmao, secretary general of the China fire retardant society, told the China chemical industry daily: "strengthening fire prevention and flame retardant work on public transport is the most important and effective technical means to avoid major fire accidents and reduce casualties in such accidents. Regardless of the cause of the accident, as far as the flame retardant performance of buses and buses in our country is concerned, we have to worry. The interior of buses, buses and other public transport vehicles, including seats and ceilings, are mostly made of plastic, which is inherently flammable. Once the fire started, it spread so quickly that passengers had no time to escape. "Plastics used in public transport must be treated with strict flame retardant to reduce the risk of fire and reduce accident losses.

"But the current situation is that the interior materials of public transport vehicles in China have poor flame retardant properties, especially those of plastics and textiles, which can easily cause a large number of casualties." China petroleum and chemical industry federation flame retardant professional committee member li yue told reporters.

According to lu guojian, deputy director of the sichuan fire research institute of the ministry of public security, in July 2014, the sichuan fire research institute of the ministry of public security organized a bus combustion experiment, comparing the combustion of an ordinary bus and a bus with flame retardant treatment. Ordinary buses catch fire quickly and flashover occurs within a few minutes, while buses with flame retardant treatment go out without flashover after half an hour. According to lu guojian, the flashover power of a hotel room is 3 mw, and the combustion power of a bus seat is 8900 kw. Therefore, if not flame retardant treatment, three or five bus seats can flashover, and the whole bus burning up is a matter of minutes.

Professor zhou zhengmao has been engaged in flame retardant research work for decades, he has a deep understanding of the importance of flame retardant products in modern life: "the nature of plastic is flammable, must be improved to become difficult to fire, the purpose of the application of flame retardant is to slow down the combustion rate of interior materials, and then delay the occurrence of flashover. It ACTS as a protective coating on the interior material, blocking oxygen and further spreading of the flames, giving passengers more time to escape in case of a fire. Experiments have shown that the fire-retardant products can extend the fire escape time to 10 times, from 2 minutes to 20 minutes, greatly increase the probability of escape, but also for the fire personnel to rush to the fire in time to win time.

The reporter learned in the interview, Europe, the United States, Japan and other developed countries, in the need for flame retardant treatment in the application of the field have very strict mandatory flame retardant standards, requirements must use flame retardant materials, flame retardant polymer materials accounted for about 8% of all polymer materials. However, the popularization of flame retardant materials in China has not received enough attention, and the proportion of flame retardant polymer materials in polymer materials is less than 1%. The reason is that the flame retardant regulations in various fields are not perfect or there is no flame retardant regulation. Either there are regulations but lax enforcement, or flame retardant standards are too low to have a real flame retardant effect.

It is reported that in order to reduce the road public transport fire accidents, the authorities are organizing the development of bus interior material combustion performance of the national standards. The new standard will consider the requirements of horizontal combustion, vertical combustion and oxygen index of bus interior materials, and solve the fire protection problem of bus interior materials from multiple dimensions.