Recently, a firefighter in Jianzhou, Hubei Province, wa […]
Recently, a firefighter in Jianzhou, Hubei Province, was trapped in a fire when he was extinguishing a fire. He tried to connect the water belt to extinguish the fire. However, the fire was too strong and he quickly burned the firefighter's battle suit. In a hurry, firefighters use the downpipe to support jumping off the building to escape. After the incident was spread through social media, many netizens were worried about the safety of the "fire man" firefighters.
I watched his escape scene and first realized Fire Resistant Fabrics that his fire service had problems. The real firefighting suit fabric is not in point. I used to put the American fire service fabric under the cone calorimeter, and the ignition heat flux of 20kW/m2 could not be seen. Now the indoor fire of Jianli has not reached a violent transition, which means that the heat flux does not reach 20kW/m2. How can it be ignited everywhere? It can be easily ignited unless it comes into contact with oil. Under normal circumstances, the fire service is so ignited and burned, only the flame retardant effect of the product needs to be improved.
In China, the fire protection equipment appeared very early. (About before 482 BC in the BC), Yue Wang asked the doctor to plant a scorpion: "I want to cut Wu, can I?" Confrontation: "Awkward. I am thick and believe, fine and must be. Jun wants to know Why don't you try to burn the palace room?" So he burned the palace room and people saved it. It is ordered that: "The firefighter of a man dies, better than the enemy of the enemy; the firefighter does not die, the reward of the enemy is better than the one who wins the enemy; the one who does not save the fire is more guilty than the fall of the north." Three thousand people on the left and three thousand people on the right. This knowledge will win the battle. Applying its body, this is the thermal radiation of the protective fire field; it is the clothing, which is to increase the flame retardant effect of the clothes. The ancients lacked an understanding of the fire and could only use this common sense to protect themselves.
The Persians and Romans used asbestos fabrics for the burning of the bodies of the king: in order to prevent the king's ashes from being contaminated by combustion-supporting materials, the bodies were wrapped in asbestos fabric. In ancient times, asbestos was also known as the "hair of the scorpion" because the ancients believed that cockroaches could survive in the fire and would not be injured. Pliny also mentioned the many uses of asbestos: for fireproofing materials, the wick of oil lamps, and the wrapping materials for burnt offerings, which can be cleaned with flames. In the famous Greek fire effect picture below, since the ancient people understood the fireproof characteristics of asbestos, the ancient people who used the Greek fire ejector, the clothes on their clothes and the shoes on their feet must have been made of asbestos.
Around 1691, a European named J. Ciampini proposed the processing of asbestos fibers into incombustible bed felts to protect firefighters from entering the fire. By 1828, Professor Aldini of Florence designed asbestos firefighting suits and wire mesh masks in front of the eyes. In 1960, asbestos was found to have a strong carcinogenic effect, so it was banned (one type of asbestos was completely banned, others are still possible, but daily life does not distinguish between the two asbestos differences, so the impression is that asbestos Disabled).
The biggest feature of fireproof clothing, in addition to the flame retardant properties similar to asbestos, is the key to comfort. Because the human body is engaged in high-intensity physical activity in the fire, the amount of sweat is very large, so the breathability of the clothing is very important. Modern firefighting suits are made of composite materials, with an outer layer that emphasizes flame retardancy and an inner layer that emphasizes comfort. If the people who develop the fire service are not willing to wear it, it is definitely a failed design.
This time, the accident occurred in Jianli told us that there is still a gap between the standard and quality of fire service in China, and it needs to be scientifically researched to solve it step by step. Today, the main textile industry is in China, and it is also necessary to import American flame retardant fabrics, which is unreasonable in any case. However, there is a textile materials research institute in North Carolina, USA, which specializes in textile products for the battlefield, but the “high-level” research of traditional industries. China is not rare, but is the safety of fire service solved?