光热复合老化对消防服用织物性能的影响

Effects of light and heat on the performance of the fabrics for fire suit

选择常用的消防服用织物进行光热复合老化试验,测试织物的表面色差、物理力学性能和热防护性能(TPP值)。结果表明:光、热单独作用及复合作用过程中,织物表面色差呈增大趋势,热老化对织物颜色的影响显著(P<0.01);光、热的交互作用对织物的面密度影响最显著(P=0.039);撕破强力和断裂强力保持率随着光照时间和热辐射时间的增加而减小,其中,光、热先后作用30 min复合老化后,织物的纬向撕破强力低于标准值100 N;光、热单独作用对织物强力保持率影响显著(P<0.05),而光、热交互作用对撕破强力保持率影响显著(P<0.05);外层织物的TPP值随着光照时间及热辐射时间的增加而增大,其中,光、热先后老化30min时,PBI织物的热防护性能最好,光、热交互作用对外层和组合织物的TPP值均有显著影响(P=0)。

Fabrics commonly used for fire suit were exposed to light and heat. The surface color difference,physical and mechanical performance and thermal protective performance（ TPP） of the fabrics were evaluated in laboratory. The results revealed that color difference increased as fabric was exposed to either light or heat or both,and the effect of heat aging on color was significant（ P 0. 01）. The gram weight of the fabric was greatly affected by the interaction between light and heat（ P= 0. 039）. With the increase of exposure time and heat radiation time,both tearing strength and breaking strength decreased,and weft tearing strength was under standard value（ 100 N） after 30 min of light and heat aging in order. Either light or heat had great influence on the reduction ratio of fabric strength（ P 〈 0. 05）,and interaction had great influence on the reduction ratio of tearing strength（ P 0. 05）. TPP value of the outer fabric increased with the increase of light and heat time,and thermal protective performance of PBI fabric was the best after 30 min of light and heat aging in order. TPP value of the outer or combination fabric was significantly affected by the interaction of light and heat（ P = 0）.