ON THE DESIGN AND SPECIFICATIONS OF FIBROUS WADDING MATERIALS FOR MAINTAINING HUMAN BODY COMFORT AT DIFFERENT ROOM TEMPERATURES

Abstract

In the present work, we propose a simple method of obtaining the optimal wadding density for cold protective clothing to maintain human thermal comfort. Using the self-developed testing device, we established the experimental relation between the thickness and thermal conductivity of the fibrous wadding materials. Then, according to the distribution of the thermal insulation of a multi-layer clothing system, we derived the relationship between the engineering thickness and the effective insulation of the fibrous wadding, which is subsequently used to obtain the analytical expression for the wadding density as a function of the effective insulation of fibrous wadding material. Eventually, we deduced the analytical expression for optimal wadding density as a function of temperature, which keeps the human body under the thermal equilibrium condition at different temperature environments. As such, we developed a scheme to rationally design fibrous wadding materials for cold protective clothing to maintain human body comfort.