This study investigates new techniques for measuring the influence of fiber, type on fabric surface vapor pressure and temperature, which are related to sensations of cloth ing comfort. Microfine hygrometry and thermometry are used to measure dynamic changes in moisture vapor pressure and temperature on both surfaces of a two-layer fabric assembly under simulated body-clothing conditions. Findings show that fiber type significantly influences transient, comfort-related variables such as changes of inner surface vapor pressure and temperature. Polyester double layer assemblies exhibit the lowest inner surface temperature, but a much higher concentration of moisture vapor. Cotton assemblies show the slowest rate of inner vapor pressure accumulation with the highest inner surface temperature rise. Mixed fabric layers of cotton and polyester reveal moderate inner surface temperature peaks and moderate vapor pressure changes. Using a completely different methodology, this study reinforces other findings that fiber type and finish are indeed important to understanding transient changes in moisture vapor and temperature within fabric and clothing assemblies and their interior microclimates.
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