织物热湿传递性能对皮肤湿感觉阈限的影响

The effects of fabric heat and moisture properties on skin moist wetness perception

为研究织物物理参数及人体皮肤散热机制对主观湿感觉的影响,文章在中性和高温两种蒸汽压相同的环境条件下,采用恒定刺激法对覆膜和不覆膜织物进行定量加湿操作,设计搭建了双杆摩擦装置,模拟前臂与织物间动态接触,得到不同条件下的皮肤冷却率和湿感觉差异阈限。结果表明:施加低于皮温0℃或8℃的冷刺激,可得到整体皮肤冷却率为0~0.21℃/s;散热机制对皮肤冷却率有显著影响(p<0.05),传导散热对皮肤温度下降作用比蒸发散热更明显;既没有蒸发散热也没有传导散热时,机械刺激是影响湿感觉判断的主要因素;增加散热提高了皮肤对织物的湿敏感度,且传导散热的作用占比更大。

To investigate the effects of fabric physical parameters and the heat dissipation mechanism of human skin on subjective wetness perception,quantitative humidification was performed on coated and uncoated fabrics under same environmental conditions with neutral and high temperature vapor pressures using constant stimulation method.A double-rod friction device was designed and established to simulate the dynamic contact between the forearm and the fabric,and the difference threshold of skin cooling rate and wetness perception under different conditions was obtained.The results show that:under the cold stimulation at 0℃or 8℃lower than skin temperature,the overall skin cooling rate is 0~0.21℃/s;the heat dissipation mechanism significantly affects the skin cooling rate(p<0.05).Compared to evaporative heat dissipation,conduction heat dissipation has a more obvious effect on lowering skin temperature.Mechanical stimulation is the main factor that affects wetness perception without evaporative or conduction heat dissipation mechanism.The skin is more sensitive to moisture when heat dissipation is improved,and conduction heat dissipation has a greater effect.