Influence of dust content in fabric on its heat-moisture transmission

In high dust environments,dust particles easily adhere or embed on / in the fabric causing the fabric heat-moisture transmission changes. Ten kinds of cotton fabrics were selected and the coal mine environments were simulated to prepare dusty fabrics. Dust content and heat-moisture transmission of clean and dusty fabrics were tested. The results showed that ventilation rate and wicking height of dusty fabrics were lower,and heat transfer coefficients of dusty fabrics were higher. On this basis,the relationship between dust content and fabric structure parameters as well as the change rules of dust content,ventilation rate,heat transfer coefficients and wicking height in the adsorption process of 150 s were investigated. The results reveal that surface density was significantly positively related to dust content; and with the increase of adsorption time,fabric dust content was increasing and tends to be stable,ventilation rate and wicking height were declining,and heat transfer coefficients was increasing and maintained constant eventually.