Evaluation of continuous cool feeling performance of printed fabrics and analysis of influencing factors
This study adopted the HFB-1 fabric cool feeling tester to objectively test the cool feeling of 12 printed fabrics.Besides,we investigated the influence of temperature,air velocity,and moisture content on fabric cool feeling.Additionally,a rank-order method was employed for a subjective assessment of fabric coolness.The results indicate that the nylon fabric demonstrats the best cooling effect.Furthermore,the maximum transient heat flux,the duration of cool feeling and the total heat dissipation during the cooling period of the fabrics were enhanced to a certain extent after the cool-felling prints.As the temperature increased,the fabric experienced a decrease in maximum transient heat flux from 254.6 W/m2 to 98.8 W/m2,and steady-state heat flux declined from 99.6 W/m2 to 27.8 W/m2.Simultaneously,with an increase in wind speed,the fabric's maximum transient heat flux rose from 243.6 W/m2 to 275.9 W/m2,and the steady-state heat flux increased from 98.5 W/m2 to 231.6 W/m2.Moreover,as moisture content increased,the fabric's maximum transient heat flux increased from 246.9 W/m2 to 376.6 W/m2,and the time to reach final thermal equilibrium extended from 318 s to 2 200 s.The correlation coefficients for fitting subjective ranking values against maximum transient heat flux density,duration of cool feeling,and total heat dissipation during the cooling period were 0.977,0.748,and 0.719,respectively.These values indicated a strong consistency between subjective assessment metrics and objective indicators.
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