| 摘要 |
Sportswear suitable for a cold environment. Though light-weight and without undue bulk, the garment is adapted to keep the wearer warm, dry and comfortable. It is fabricated of a composite fabric that includes a vapor-permeable laminate formed by a core layer of hollow fibers acting as a thermal blanket sandwiched between inner and outer skins. Both faces of the inner skin and the inside face of the outer skin are metallized to render them reflective, whereas the outside face of the outer skin is blackened to render it absorbent of solar energy. When the garment is worn, radiant heat from the body is returned thereto by the reflective outside face of the inner skin while convection heat from the wearer's body passes by conduction through the inner skin of the laminate to be absorbed by the core layer. At the same time, solar heat absorbed by the blackened face is conducted through the outer skin to be absorbed by the core layer. The loss of infrared energy from the core layer is minimized by internal reflection from the reflective inside faces of the skins. Hence, the laminate functions as a bi-directional heat transfer trap with respect to convection heat derived from the wearer's body and heat derived from solar energy.
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