Effect of Fibre Type on Heat Loss Through Fabrics.
DEFENCE AND CIVIL INST OF ENVIRONMENTAL MEDICINE DOWNSVIEW (ONTARIO)
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The heat flow through thin cotton and polyester woven fabrics of similar physical properties, plus three types of knitted underwear, was measured on a guarded hot plate to determine the influence of fibre type on heat loss. Two conditions were selected - one where the fabric was wetted and allowed to dry to simulate the case where the sweat had totally wicked from the skin into the clothing on top of it and one where a warm surface was wetted to simulate sweating skin and a dry fabric placed on top of it. It was found that the fibre type has no influence on the heat loss through a dry fabric or from a wet fabric. Further, more heat was lost from the skin when water remained on it, rather than wicking to the overlying fabric. Finally, the time for a wet fabric to dry and the amount of energy required to do so depended entirely on the amount of water originally in the fabric, again independent of fibre type.
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