Clothes with good moisture absorption are beneficial to maintaining the heat balance of the human body in summer or winter. The inner clothing has good moisture absorption, which is conducive to the evaporation of skin moisture The outer clothing material should also have good moisture absorption. The moisture absorption and dehumidification process of clothing fiber is related to the relative humidity of the surrounding air. In winter, the outdoor relative humidity is higher than that of the indoor. The outer clothes absorb the water vapor in the environment, and the humidity is relatively high. In the process of moisture absorption, the water vapor condenses on the outer clothes. Due to the heat released in the condensation process, the temperature of the outer clothes increases, which can prevent the human body from losing a large amount of heat in a short time and reduce the degree of cold stress when staying outdoors.

服装的防风性强俗话说"寒风刺骨"，风透入衣服内.扰乱了衣料纱线之间和衣下气层的静止空气，甚影响纺织纤维中死腔空气的隔热特性,增加了对流散热,减少了服装的隔热值。所以冬季服装的外层应选择致密、透气性小的材料,例如呢绒.毛皮和革制品等.

Clothing has strong wind resistance. As the saying goes, "the cold wind is biting", and the wind penetrates into the clothing It disturbs the still air between the clothing yarns and the air layer under the clothing, and even affects the heat insulation characteristics of the dead cavity air in the textile fiber, increases the convective heat dissipation and reduces the heat insulation value of the clothing. Therefore, the outer layer of winter clothing should be made of dense and low permeability materials, such as wool Fur and leather products, etc

冬季工作服以防寒防冻为主,服装的保温性是一位的。应当选择导热系数小的衣料.因为空气的导热系数小,所以导热系数小的纺织材料其纤维中固有的死腔空气多.比较蓬松,柔软,重量轻.动物绒毛如羊毛,驼毛、鸭绒等是保暖性好的材料.氯纶的保暖性比棉花高50%,所以.氯纶膨体纱也是一种很好的保暖材料。

Winter work clothes are mainly cold proof and antifreeze, and the thermal insulation of clothes is a priority. First of all, clothing materials with low thermal conductivity should be selected Because the thermal conductivity of air is small, textile materials with small thermal conductivity have more dead cavity air in their fibers It is fluffy, soft and light in weight Animal hair, such as wool, camel hair and duck down, is a good material for keeping warm The warmth retention of nylon is 50% higher than that of cotton, so Expanded nylon yarn is also a good thermal insulation material.

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