Performance aging of camouflage training uniforms in high-altitude and cold environments
In order to explore the performance changes of camouflage training uniforms worn by border soldiers,three cities in the Qinghai Tibet Plateau region,Xining,Golmud,and Shigatse,are selected to use a self-designed outdoor exposure system to expose the camouflage training uniform fabric outdoors.The microstructure,mechanical properties,thermal properties,and chemical structure of the samples before and after aging are analyzed.The results show that after aging,cracks appeare on the surface of the fibers,and even fiber splitting and fracture appeare;After aging,the samples in the Shigatse region suffer the greatest damage,with a decrease of 52.17％and 39.62％in longitudinal and transverse fracture strength,56.73％in bursting strength,and 88.70％and 87.31％in longitudinal and transverse tearing strength,respectively;After aging,the temperature and melting temperature of the fabric both move towards the low temperature zone when it reaches its maximum thermal decomposition rate,resulting in a decrease in thermal stability;Infrared spectroscopy analysis finds that there is no significant change in the position and shape of the characteristic peaks,and some characteristic peak intensities change without the generation of new substances.This study can provide theoretical reference for the use of camouflage training uniforms in harsh environments.
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