登山衣着装备（Mountaineering apparel）.doc

登山衣着装备（Mountaineering apparel） The clothing and equipment of mountaineering The purpose of clothing The purpose of clothing is to keep warm, protect and comfortable. 2. In principle, mountaineering clothing should be highly mobile and regulatory. 3. The mountain of the temperature lower than the temperature of the ground, every one thousand meters the temperature decrease 6 ° C (vertical lapse rate = 6 (C/Km). But the temperature measured on the mountain does not equal the temperature that the body feels. If there is wind, the flow of air can continuously remove the heat from the surface of the body, such wind chill effect makes the body temperature is lower than the actual temperature in the wind. A simple formula: Body temperature = temperature - 4 * (wind velocity per second (m/SEC [Josie1])) 1/2 4. The clothes should be kept dry as far as possible. The water is 23 times higher than the air, and if the wind is added, it will often result in a loss of temperature and accidents. Ii. The choice of climbing clothes 1. All mountaineering clothes should not be too tight, otherwise it will hinder blood circulation and the comfort of the space, and lose a layer of air convection space, will reduce warmth. 2. Clothing material characteristics (1) cotton: the absorbent is strong, not easy to dry, and it will not be effective to absorb 8%. (2) wool: hydrophilic molecular structure, strong absorption, weak drainage, not easy to dry. The fibers are crimp, and are the only natural hollow fiber that absorbs 30% to keep warm. (3) down: because the surface contains a layer of grease and can collect a large amount of air, the light and thermal insulation effect is excellent, once the water has lost its warmth. (4) PP: the main materials for PE (Polyester) or PP (polypropylene), for the water repellency fiber, with sweat, the characteristics of easy to dry. (5) gore-tex: the material is the thin film of Teflon, which is not afraid of acid, alkali, cold and heat, and has the charact