<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：氨纶纤维是弹力纤维中的一种，弹力纤维国外统称为Spandex (斯潘德克斯)，我国的商品名称为氨纶，实际上氨纶仅是弹力纤维的一个大类。氨纶纤维(Polyurethane Fibre)简称PU纤维，共有两个品种，一个是由芳香双异氰酸酯和含有羟基的聚酯链段镶嵌共聚物，简称为聚酯型氨纶，另一个品种是由芳香双异氰酸酯与含有羟基的聚醚链段镶嵌共聚物，简称为聚醚型氨纶。聚酯型氨纶代表性的商品名称为Vyrent(瓦伊伦)，聚醚型氨纶代表性的商品名称为Lyera (莱克拉)。</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;">　　氨纶纤维主要的性能为：通常有500％～700％以上的伸长，弹性回复性能好。在伸长200％时回缩97％，在伸长50％时回缩超过99％。各种氨纶相对密度差异较小，一般为1．20～1．25，断裂强度为4．41～8．82cN／tex(0．5～1．Og／旦)，聚酯型氨纶强力较低，聚醚型氨纶强力则较高。吸湿率一般为0．3％一1．2％，复丝吸湿率要比单丝稍高，耐热一般在95～150℃时短时问存放不会损伤纤维，安全熨烫温度为150℃以下。纤维燃烧较慢，燃烧后形成胶状残渣。染色性能优良，可染多种颜色，对染料亲和力强。耐酸碱性能好，能漂白，不发霉。</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>