\n The breathability and moisture permeability of composite fabrics can be expressed by moisture resistance. When there is a water vapor concentration difference (or water vapor partial pressure difference) on both sides of the fabric, the resistance of moisture passing through the fabric is called the moisture resistance of the fabric. It is expressed by the following formula: <\/p<\/p>\n
\n R=C\/q<\/p<\/p>\n
\n R—-fabric fabric moisture resistance;<\/p<\/p>\n
\n q——Air and moisture permeability speed (wet flow rate), kg\/m2.s;<\/p<\/p>\n
\n c—-water vapor concentration difference, kg\/m3.<\/p<\/p>\n
\n \t\u7a33\u5b9a\u6269\u6563\u72b6\u6001\u4e0b\uff0c\u6e7f\u963b\u8d8a\u5927\uff0c\u900f\u6e7f\u80fd\u529b\u6216\u900f\u6e7f\u901f\u5ea6\u8d8a\u5c0f\u3002<\/p>\n
\n <\/p<\/p>\n
\n 1. Temperature and humidity conditions of fiber<\/p<\/p>\n
\n Experiments show that under the same conditions of fabric structure (including the volume proportion of fabric in fiber), fiber type has almost no effect on fabric resistance. Hollis tested hydrophilic treated polyester fabric and untreated polyester fabric. Comparative experiments on polyester fabrics also show that under low humidity conditions, the transmission of water vapor is not significantly related to the type of fibers in the fabric. Only under commercial temperature conditions, the moisture permeability of polyester fabrics treated with hydrophilicity is significantly better than that of polyester fabrics without hydrophilic treatment. Researchers from the United States, Japan and other countries have conducted similar tests on fabrics and clothing. , the same conclusion was obtained \ufffd<\/p<\/p>\n
\n In fact, under low humidity conditions, because the fiber itself absorbs less moisture, and the diffusion coefficient of air is larger than that of the fiber, a lot of water vapor diffuses through the pores between the fabrics to the side with lower water vapor pressure, indicating that the transfer of water vapor in the fabric is related to the fiber type. Doesn’t matter much \ufffd\u8fd9\u65f6\u7ec7\u7269\u7684\u539a\u5ea6\u548c\u5b54\u9699\u7387\u6216\u7ec7\u7269\u7ed3\u6784\u662f\u51b3\u5b9a\u7ec7\u7269\u900f\u6e7f\u7684\u4e3b\u8981\u56e0\u7d20\ufffd \ufffd<\/p<\/p>\n
\n \t\u53e6\u4e00\u65b9\u9762\uff0c\u7ea4\u7ef4\u677f\u7684\u5438\u6e7f\u8fd8\u540c\u6e29\u5ea6\u6709\u5173\ufffd During the process of soaking, the fibers must release a certain amount of heat after absorbing moisture, causing the temperature of the fiber aggregate to increase. The partial pressure of water vapor inside the fiber increases, which reduces the gradient of moisture concentration between the inside of the fiber and the outside, making the fiber Moisture absorption speed and diffusion moisture vapor transmission speed slow down \ufffd\u7ea4\u7ef4\u7684\u6269\u6563\u7cfb\u6570\u4f1a\u968f\u6e29\u5ea6\u7684\u5347\u9ad8\u800c\u5448\u6307\u6570\u589e\u5927\uff0c\u5728\u5438\u6e7f\u65f6\u8fd9\u79cd\u589e\u52a0\u66f4\u4e3a\u660e\u663e\uff0c\u56e0\u6b64\u6e29\uff0c\u6e7f\u5ea6\u7684\u589e\u52a0\u4f1a\u4f7f\u7ec7\u7269\u5185\u7ea4\u7ef4\u7684\u4f20\u6e7f\u80fd\u529b\u52a0\u5f3a\ufffd \ufffd\u4ece\u5438\u6e7f\u6216\u653e\u6e7f\u7684\u901f\u5ea6\u6765\u770b\uff0c\u4e00\u822c\u8868\u73b0\u4e3a\u5f00\u59cb\u8f83\u5feb\uff0c\u968f\u5438\u6e7f\u6216\u653e\u6e7f\u7684\u589e\u52a0\u800c\u9010\u6e10\u51cf\u6162\uff0c\u7ec8\u8fbe\u5230\u5438\u6e7f\u5e73\u8861\ufffd \ufffd\u4f46\u8fc7\u5230\u5e73\u8861\u6240\u9700\u65f6\u95f4\u5219\u4e0e\u7ea4\u7ef4\u81ea\u8eab\u7684\u5438\u6e7f\u80fd\u529b\u548c\u7ea4\u7ef4\u96c6\u5408\u4f53\u7684\u677e\u7d27\u7a0b\u5ea6\u6709\u5173\ufffd \ufffd\u6b64\u5916\uff0c\u5438\u6e7f\u540e\u7ea4\u7ef4\u7684\u5bfc\u70ed\u7cfb\u6570\u5c06\u589e\u5927\ufffd \ufffd\u7ea4\u7ef4\u81ea\u8eab\u5438\u6e7f\u5bfc\u81f4\u7684\u900f\u6e7f\u4f5c\u7528\u5341\u5206\u590d\u6742,\u76ee\u524d\u5c1a\u672a\u6709\u5f88\u5b8c\u5584\u7684\u7406\u8bba\u6765\u5b9a\u91cf\u63cf\u8ff0\ufffd \ufffd<\/p<\/p>\n
\n <\/p<\/p>\n
\n 2. Fabric thickness and coverage coefficient<\/p<\/p>\n
\n \t\u7ec7\u7269\u7684\u539a\u5ea6\u4e0e\u5176\u6e7f\u963b\u6709\u8fd1\u4f3c\u7684\u3002\u4e00\u822c\u7ec7\u7269\u539a\u5ea6\u8d8a\u539a\uff0c\u7ec7\u7269\u6e7f\u963b\u8d8a\u5927\u3002\u8fd9\u662f\u56e0\u4e3a\u7ec7\u7269\u539a\u5ea6\u8d8a\u539a\uff0c\u6c34\u6c7d\u901a\u8fc7\u7ec7\u7269\u95f4\u7684\u5b54\u9699\u6240\u8d70\u8def\u5f84\u8d8a\u957f\u3002\u53e6\u5916\uff0c\u5b9e\u9a8c\u8868\u660e\uff0c\u7ec7\u7269\u5b54\u9699\u7387\u7684\u53d8\u5316\u5bf9\u7ec7\u7269\u6e7f\u963b\u7684\u5f71\u54cd\u662f\u660e\u663e\u7684\u3002<\/p>\n
\n <\/p<\/p>\n
\n 3. Types of fibers and filling rate<\/p<\/p>\n
\n \t\u5728\u9ad8\u6e7f\u6216\u7ec7\u7269\u7ed3\u6784\u8f83\u7d27\u5bc6\u7684\u60c5\u51b5\u4e0b\uff0c\u6c34\u6c7d\u4e0d\u518d\u53ea\u662f\u7ecf\u8fc7\u7ec7\u7269\u4e2d\u7684\u5b54\u9699\u4f20\u9012\u800c\u662f\u7531\u7ea4\u7ef4\u81ea\u8eab\u8fdb\u884c\u4f20\u9012\uff0c\u6b64\u65f6\u7ea4\u7ef4\u7684\u79cd\u7c7b\u6210\u4e3a\u5f71\u54cd\u7ec7\u7269\u4f20\u9012\u7684\u91cd\u8981\u56e0\u7d20\u3002\u4e00\u65b9\u9762\u7ea4\u7ef4\u81ea\u8eab\u5438\u6e7f\u4ea7\u751f\u6eb6\u80c0\uff0c\u4f7f\u7ec7\u7269\u66f4\u52a0\u7d27\u5bc6\uff0c\u7ec7\u7269\u7684\u900f\u6c14\u6027\u51cf\u5f31\uff0c\u4f9d\u9760\u5b54\u9699\u6269\u6563\u4f20\u6e7f\u4f5c\u7528\u51cf\u5c0f\uff1b\u53e6\u4e00\u65b9\u9762\u4e0e\u7ec7\u7269\u7684\u622a\u9762\u79ef\u76f8\u6bd4\uff0c\u7ea4\u7ef4\u677f\u7684\u8868\u9762\u79ef\u662f\u4e00\u4e2a\u76f8\u5f53\u5927\u6570\u91cf\u7ea7\u7684\u91cf\u3002\u7ea4\u7ef4\u5438\u6e7f\u91cf\u8f83\u5927\u65f6\uff0c\u6c34\u5206\u901a\u8fc7\u7ea4\u7ef4\u8868\u9762\u6269\u6563\u5373\u6bdb\u7ec6\u7ba1\u4ea7\u751f\u7684\u82af\u5438\u4f5c\u7528\u5f97\u5230\u4e86\u52a0\u5f3a\uff0c\u6210\u4e3a\u7ec7\u7269\u4f20\u6e7f\u7684\u4e3b\u8981\u65b9\u9762\uff0c\u7ec7\u7269\u5b54\u9699\u7387\u51cf\u5c0f\u5f15\u8d77\u6269\u6563\u900f\u6e7f\u51cf\u5c0f\u6210\u4e3a\u6b21\u8981\u77db\u76fe\u3002\u56e0\u6b64\u53ea\u8981\u7ec7\u7269\u5185\u7ea4\u7ef4\u56de\u6f6e\u7387\u8fbe\u5230\u4e00\u5b9a\u7684\u7a0b\u5ea6\uff0c\u5c3d\u7ba1\u5b54\u9699\u51cf\u5c11\u4f7f\u5f97\u7ec7\u7269\u5185\u7531\u7a7a\u6c14\u4ecb\u8d28\u7684\u4f20\u6e7f\u91cf\u51cf\u5c11\uff0c\u4f46\u7531\u4e8e\u7ea4\u7ef4\u81ea\u8eab\u7684\u4f20\u6e7f\u6709\u5b9e\u8d28\u51e0\u5929\u7684\u589e\u52a0\uff0c\u6e7f\u963b\u8fd8\u662f\u6709\u53ef\u80fd\u51cf\u5c0f\u3002<\/p>\n
\n \t\u800c\u65e0\u8bba\u662f\u7ea4\u7ef4\u81ea\u8eab\u4f20\u6e7f\u8fd8\u662f\u6bdb\u7ec6\u7ba1\u4ea7\u751f\u7684\u82af\u5438\u4f20\u6e7f\u90fd\u4e0e\u7ea4\u7ef4\u7684\u4eb2\u6c34\u6027\u548c\u7ea4\u7ef4\u8868\u9762\u6027\u80fd\u6709\u5bc6\u5207\u7684\u5173\u7cfb\ufffd \ufffd\u8bd5\u9a8c\u7ed3\u679c\u8868\u660e\u5728\u76f8\u540c\u7d27\u5bc6\u7a0b\u5ea6\u6761\u4ef6\u4e0b\uff0c\u4e0d\u540c\u79cd\u7c7b\u7ea4\u7ef4\u7684\u6c34\u6c7d\u6e7f\u6da6\u963b\u4e0e\u7ec7\u7269\u7d27\u5bc6\u7a0b\u5ea6\u7684\u5173\u7cfb\ufffd Obviously, under the condition of low tightness, there is little difference in the moisture resistance of various fiber fabrics. When the density factor reaches 0.4 or higher than 0.4, the fiber surface is not smooth, the fiber cross-section is irregular, and the fibers with good hygroscopicity, such as For cotton and wool, as the fiber aggregate filling rate increases, the fabric moisture resistance increases slightly, and there is a good linear relationship between the fabric moisture resistance and the filling rate. However, for chemical fibers such as nylon, chlorine, and glass fiber, when the filling rate is large (small porosity, large capacity), such as the filling rate is greater than 39% or the porosity is less than 61%, and the fabric bulk density is greater than 0.98 g\/cm3 (for glass fiber fabric) moisture resistance will rise sharply with the increase in bulk density and filling rate (or decrease in porosity) \ufffd\u5438\u6e7f\u6027\u597d\u7684\u68c9\u3001\u7f8a\u6bdb\u7b49\u7ea4\u7ef4\u7ec7\u7269\u7684\u6e7f\u963b\u660e\u663e\u4f4e\u4e8e\u975e\u5438\u6e7f\u6027\u7ea4\u7ef4\u7ec7\u7269\u7684\u6e7f\u963b\uff0c\u4e5f\u5c31\u662f\u8bf4\u7ea4\u7ef4\u4eb2\u6c34\u6027\u5bf9\u7ec7\u7269\u4f20\u6e7f\u6027\u7684\u5f71\u54cd\u662f\u901a\u8fc7\u7ec7\u7269\u7d27\u5bc6\u5ea6\u6765\u51b3\u5b9a\u7684\ufffd \ufffd<\/p<\/p>\n
\n Therefore, for fabrics with a loose structure and high porosity, when the relative humidity of the air is low, regardless of whether the fibers absorb moisture, the moisture permeability is mainly diffusion through the gaps between fibers and yarns; while in small processIt is mainly affected by the type of fiber. When the relative humidity of the air is high, the fibers with good hygroscopicity are woven into a tight fabric. After the fibers absorb moisture and expand, the gaps between the fibers are reduced, the proportion of diffuse moisture permeability is reduced, and the moisture content within the fibers is reduced. The proportion of capillary moisture permeability increases, and capillary moisture permeability becomes the main factor. <\/p>\n
\n <\/p<\/p>\n
\n 4. Fabric finishing<\/p<\/p>\n
\n \t\u6d82\u5c42\u6216\u6d78\u6e0d\u7b49\u7ec7\u7269\u540e\u6574\u7406\u4f1a\u589e\u52a0\u7ec7\u7269\u7684\u6e7f\u963b\u3002\u56e0\u4e3a\u5b83\u589e\u52a0\u4e86\u6c34\u6c7d\u901a\u8fc7\u7ec7\u7269\u7684\u8def\u5f84\u6216\u5835\u585e\u4e86\u7ec7\u7269\u7684\u7a7a\u9699\u3002\u7136\u800c\uff0c\u4eb2\u6c34\u6574\u7406\u4f1a\u4f7f\u7ec7\u7269\u7684\u900f\u6e7f\u6027\u589e\u52a0\u3002\u62d2\u6c34\u6574\u7406\u4e00\u822c\u4e0d\u5f71\u54cd\u7ec7\u7269\u7684\u900f\u6e7f\u6027\u3002<\/p>\n
\n <\/p<\/p>\n
\n 5. Other factors<\/p<\/p>\n
\n Generally, the liquid water transmission speed of the fabric is greater than the evaporation rate of the liquid surface. There are smaller gaps and holes on the inside of the fabric, which makes it easy to condense into liquid water and transport it outward, forming a differential capillary effect. There are larger gaps and holes on the outside, which makes it easy to meet the evaporation conditions. , helpful for dispersing dampness The evaporation capacity of liquid water on the surface of the fabric is not closely related to the fabric thickness, porosity, etc., but is closely related to the concave and convex shape of the fabric surface, especially the size and depth of the surface pits. In general, the larger the pit opening area, the larger the pit opening area. The larger the radius of curvature, the higher the evaporation efficiency \ufffd\u51f9\u5751\u7684\u7ec6\u8282\u3001\u98ce\u901f\u3001\u6e29\u5dee\u7b49\u4e5f\u6709\u660e\u663e\u7684\u5f71\u54cd\ufffd \ufffd<\/p<\/p>\n
\n Source of article: Yingjie Textile <\/p>\n
Extended reading: https :\/\/www.alltextile.cn\/product\/product-34-353.html<\/a> The breathability and moisture permeability of composite fabrics can be expressed by moisture resistance. When there is a water vapor concentration difference (or water vapor parti…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[46],"class_list":["post-8041","post","type-post","status-publish","format-standard","hentry","category-textile-fabric-news","tag-db"],"_links":{"self":[{"href":"https:\/\/www.textile-fabric.com\/index.php?rest_route=\/wp\/v2\/posts\/8041","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.textile-fabric.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.textile-fabric.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.textile-fabric.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.textile-fabric.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=8041"}],"version-history":[{"count":0,"href":"https:\/\/www.textile-fabric.com\/index.php?rest_route=\/wp\/v2\/posts\/8041\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.textile-fabric.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8041"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.textile-fabric.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8041"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.textile-fabric.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8041"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
Extended reading: https:\/\/www.china-fire-retardant.com\/post\/9577.html<\/a>
Extended reading: https:\/\/www.china-fire-retardant.com\/post\/9570.html<\/a>
Extended reading:https:\/\/www.brandfabric.net\/two-layer-two-stretch-breathable-fabric\/ <\/a>
Extended reading: https:\/\/www.china-fire-retardant.com\/post\/9573.html<\/a>
Extended reading: https:\/\/www.alltextile.cn\/product\/product-72-673.html<\/a>
Extended reading:https:\/\/www.yingjietex.com\/product\/Twist-Satin-with-Jacquard-Fabric .html<\/a>
Extended reading: https:\/\/www.yingjietex.com\/product\/Full-Dull-N-C-dobby-Print-Fabric.html<\/a>
Extended reading: https:\/\/www.alltextile.cn\/product\/product-76-620.html<\/a>
Extended reading:https:\/\/www.yingjietex.com\/product\/DOBBY-PONGEE-Breathable-Fabric.ht<\/p>\n","protected":false},"excerpt":{"rendered":"