Evaluating the performance of the outer layer of extreme heat protective clothing using different woven structures.

This study examines the interplay of weave patterns, picks per inch (PPI) and key performance metrics including heat protective performance (HPP), air permeability, thermal resistance and water vapor transmission rate (WVTR). Three weave structures (twill, sateen and honeycomb) using Nomex-IIIA yarn were tested. Heat flux of 80 ± 2 kW/m was applied, combining flame and radiative heat.