天气预报 > 其他 > 为什么人要在冬天要穿毛衣
为什么人要在冬天要穿毛衣
更新时间: 2020-09-23 00:00:00  

毛衣是用很细的纤维织成的,纤维之间的空隙多而细小,充满基本无法流动的空气。空气是热的不良导体,又无法对流散热。毛衣就成为一层厚厚的隔热层,使身体的热量在寒冷的环境中不易散失,达到保暖的作用。现在的多孔棉因为纤维中空,蕴含更多空气,也更为保暖。

关键词: 为什么 冬天 毛衣

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