The four stages of textile combustion refer to: ignition stage, fire spread stage, burning peak stage and burning end stage. Each of the four stages has its own specific combustion characteristics and performance.
Phase 1: Ignition Phase
The ignition phase, also known as the pre-ignition period, refers to the process from the time the textile starts to burn until the flame appears. In this stage, the combustion is mainly caused by an external heat source (such as an open flame, electric soldering iron, etc.), and the fibers begin to disintegrate, releasing heat and gases. These gases will accelerate the decomposition under the action of heat source, generate more heat and combustible gas, and make the fiber more flammable.
The second stage: the fire spread stage
The fire spread phase is when the flame starts to appear on the surface of the textile and the fire starts to spread rapidly. In this stage, the fiber decomposition speed is accelerated, and the flammable gas and heat generated are also increased, so that the fire spreads rapidly. At the same time, the gas generated by the combustion of the fibers will form a heat layer around the flame, which will accelerate the combustion.
The third stage: the peak stage of combustion
The peak combustion phase refers to the process when the fire reaches its highest point. In this stage, the decomposition rate of fibers is the fastest, and the generation of combustible gases and heat is also the largest. At the same time, the heat layer around the flame also reaches the highest temperature, making the combustion more intense. During this stage, the fire is difficult to control and requires effective fire suppression measures.
The fourth stage: the end of combustion stage
The end-of-combustion stage refers to the process in which the flame is extinguished when the fiber is completely burned. During this stage, the decomposition rate of fibers gradually slows down, and the generation of combustible gases and heat gradually decreases. At the same time, the heat layer around the flame also gradually disappears, so that the combustion gradually stops. At this stage, attention needs to be paid to residual heat sources and possible risk of re-ignition.
In general, understanding the four stages of textile combustion can help us better understand the combustion characteristics and dangers of textiles, so as to take effective prevention and control measures to ensure the safety of people and property.