<div><br></div><div><section class="_135editor" data-role="paragraph" style="font-size: medium; max-inline-size: 100%; margin: 0px; padding: 0px; border: 0px none; z-index: 0; overflow-wrap: break-word !important; outline: none 0px !important;"><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; font-size: 15px; overflow-wrap: break-word !important; outline: none 0px !important;">　　答 防水透湿涂层织物是一种具有防水和透湿两种相反功能的织物。以多孔性薄膜黏合法做防水透湿涂层为例，它是将聚四氟乙烯细粉加热制成薄膜，再急速进行横纵向拉伸，冷却后就形成热固性蛛网状的微细多孔结构。最后将薄膜用黏合剂压在尼龙绸或涤纶织物上，制成防水透湿涂层织物。由于织物上覆盖着一层多孔性薄膜，其微孔直径为0．5～3μm，它比雨滴直径(100～300μm)小得多，所以涂层织物上所形成的微孔完全能阻止水滴和雨水的通过。另外，由于外部环境与衣服内存在着温度差和水汽压差，使得人体汗水蒸气可以顺利透过微孔散发到体外。而人体汗水蒸气分子的大小约为0．O004μm，远远小于薄膜微孔的直径。</span></p></section><section class="_135editor" data-role="paragraph" id="autoparagraph" style="font-size: medium; max-inline-size: 100%; margin: 0px; padding: 0px; border: 0px none; z-index: 0; overflow-wrap: break-word !important; outline: none 0px !important;"><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; font-family: 微软雅黑, &quot;Microsoft YaHei&quot;, sans-serif; font-size: 17px; caret-color: rgb(255, 0, 0); overflow-wrap: break-word !important; outline: none 0px !important;"></p></section></div>