Factors affecting the combustion performance of textiles
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Burning performance of textile flame retardant fabrics
In addition to the chemical composition of the fiber, the combustion performance of the fabric is also related to the fuel and finishing agent contained in the fabric, the organizational structure of the fabric and external conditions.
1. The organizational structure of the fabric
The organizational structure of the fabric affects the burning rate and flame spread performance of the fabric. For the same fiber material, a fabric with a tight and thick organizational structure burns slower and is not easy to spread, so The air content in tight and heavy fabrics is relatively low, resulting in insufficient oxygen supply and reduced combustion performance. Therefore, the organizational structure should be selected rationally to obtain better flame retardant effect with lighter and fewer fibers.
2. Temperature
The effect of temperature on the burning performance of fabrics can be explained by the change in oxygen index. When the combustion temperature increases from 25°C to 150°C, the oxygen index of non-flame-retardant cotton drops from 18% to 14%, while flame-retardant cotton decreases from 35% to 27%, and the flammability of the fabric increases as the temperature increases.
3. Moisture-containing fabrics: The burning performance of fabrics is also affected by their moisture content. When fabrics are heated and burned, water first evaporates and needs to absorb heat. Therefore, high relative humidity has an inhibitory effect on the spread of flames. . The burning rate in moist air is generally slower.
4. Air pressure
The air pressure also has a certain impact on the burning rate of fabrics. The burning rate increases with the increase of air pressure. This is because the partial pressure of oxygen in the air increases with the increase of pressure, so The burning rate increases.
In addition, the effects of external sunlight and heat also affect the combustion performance, so the flame retardant properties of fabrics must be comparable under the same conditions.
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