Human beings have a heat regulation mechanism in which, depending on various factors, energy production is controlled to balance with energy output, keeping the body core temperature constant. Structured fiber materials made of organic polymer fibers have been used as ideal clothing materials for thousands of years and will continue to be used in the future for protecting the bodies' heat balance. Fibre material itself has low thermal conductivity, while structured fibre material has high thermal insulation and permeability. These features control the heat and water vapor transfer so as to assist the heat regulation mechanism of the human body, resulting in physiological conformity.
Clothing material is a typical example of materials used in the human environment. Such materials require harmony with human sense. In this paper, we look at these materials from the standpoint of their thermophysical properties, represented by their surface characteristics, heat and water transfer and mechanical properties.
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