Abstract: In order to improve thermal comfort of fire-fighting clothing, an inorganic phase change material was prepared, and simulation tests were carried out under high temperature and humidity environment in an artificial cabin. Secondly, spatial temperature distribution characteristics of anti-fire suits were obtained and thermal output of upper torsos from high temperature, humidity and strength group was calculated. Then, improvement experiments were performed based on test data. The results show that change of temperature has more significant influence on variance of skin temperature than that of humidity. Temperature of each part under suit range from high to law as left shoulder blade, left shoulder, left waist, right shoulder blade, right shoulder, right waist, right abdomen, left abdomen, front middle and back middle. Under circumstance of highest temperature and humidity, evaporation and heat dissipation of skin on upper torsos was 7.20 kJ with intense labor. The material shows optimal cooling effect when ratio of sodium sulfate decahydrate and potassium carbonate is 3∶1.

Key words: fire fighting clothing, inorganic phase change materials, internal space temperature, eutectic reaction, microscopic characterization