<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：氨纶包芯纱是以氨纶丝为纱芯，外包一种或几种非弹力的短纤维(称为外鞘)而纺成的纱线，如图2-4(a)所示。芯丝被外纤维包围其中，两者结合较为紧密，芯丝与外包纤维具有相同的捻度，它具有三个特点：一是与外包纤维(棉、毛、涤／棉等)有同样的手感和外观，由天然纤维组成的外鞘吸湿性好；二是弹性好；三是弹性能控制在20％以下。</span></p><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; overflow-wrap: break-word !important; outline: none 0px !important;"></p><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;">　　氨纶包芯纱与其他弹力纱线相比较还有一个显著的优点，即纱线在紧张拉伸的状态下芯丝不外露，为此染色效果好，宜做包括深色的各种颜色的产品。但与其他类型的弹力纱线相比，包芯纱的强力相对较低。一般情况下，单纱强力只相当于同规格外包纤维单独成纱时的80％～90％，包芯纱首先断裂的是外包纤维，外包纤维所形成的强力即是包芯纱的强力。氨纶丝是一根低强高伸的长丝，它在包芯纱内无助于纱线的强力，因此，氨纶含量越高，包芯纱的强度越低。</span></p><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; overflow-wrap: break-word !important; outline: none 0px !important;"></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>