反热辐射层对消防织物系统热防护性能的影响

Effect of Anti-thermal Radiation Layer on Thermal Protective Performance of Firefighter Suit System

火场环境中,热辐射是造成消防员烧伤的主要原因之一,因此消防面料的反热辐射性能对保护消防员的生命安全至关重要。为了增加消防面料的反辐射效果,本文将铝箔作为反热辐射层置于消防服面料系统中的不同位置,通过测试加入了反热辐射层后系统的TPP(Thermal protective performance)值,以此探究其对消防面料的热反射效果。实验结果表明:增加反热辐射层后系统TPP值均有所提高,当反热辐射层位于外层和防水透气层之间时,TPP值为54.32,热防护效果最好;而将其放在外层之上直面火源时,TPP值为45.50,则防护效果最差。通过打孔来改善铝箔的通透性,以提高系统的透气性能,但铝箔的孔洞率越大,系统的热防护效果越差,当孔洞率由0个/cm2增大到37.42个/cm2时,TPP值由64.28降至51.84。

Thermal radiation is one of the main reasons causing burn to firefighters in fire environment. Anti-thermal radiation performance of firefighter fabric is critical for firefighters safety. In order to improve the anti-thermal radiation performance of firefighter suit system, aluminum foil was used as the anti-thermal radiation layer. Then TPP （thermal protective performance） value of the system with aluminum foil placed in different location was tested to investigate the heat reflective effect of the firefighter fabric. The results show that TPP is 54. 32, the best performance when the anti-thermal radiation layer is located between the outer layer and the water-proof ventilation layer. But TPP is only 45.50, the worst performance when it is located on the outer surface. Well-drilled aluminum foil can improve permeability of itself and the whole system as well. However, the larger the porosity is, the worse the thermal protective performance will be. When the porosity increases from 0 to 37.42per/cm^2 , TPP decreases from 64.28 to 51.84.