<section data-role="outer" class="article135" label="edit by 135editor"><section data-role="paragraph" class="_135editor"><p style="margin-bottom: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; color: rgba(0, 0, 0, 0.9); font-size: 16px; letter-spacing: 0.544px; text-align: justify; line-height: 1.75em; font-family: 微软雅黑; overflow-wrap: break-word !important;" align="justify"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; font-size: 14px; overflow-wrap: break-word !important;"></span></p><section class="_135editor" data-tools="135编辑器" data-id="125446"><section style="margin: 10px auto;"><section style="margin-bottom: 10px;"><section style="font-size: 16px; color: rgb(255, 255, 255); letter-spacing: 1.5px; text-align: center; padding: 5px 20px; background: rgb(110, 193, 245);"><p style="line-height:1.75em"><span style="font-size:14px;"><b>捻缩</b></span></p></section><section style="margin: 10px auto;"><section style="border: 1px solid rgb(255, 202, 66); padding: 0px;"><section style="padding: 20px;" hm_fix="449:724"><section class="135brush" data-autoskip="1" style="text-align: justify; line-height: 1.75em; letter-spacing: 1.5px; color: rgb(51, 51, 51); background: transparent;"><p style="line-height:1.75em"><span style="color: rgb(0, 0, 0);">加捻后，由于纤维倾斜，使纱的长度缩短，产生捻缩。捻缩的大小通常用捻缩率来表示，即加捻前后纱条长度的差值占加捻前长度的百分率。</span></p><p><br></p><p style="line-height:1.75em"><span style="color: rgb(0, 0, 0);">捻缩率的大小，直接影响纺成纱的线密度和捻度，在纺纱和捻线工艺设计中，必须加以考虑。棉纱的捻缩率一般为2%~3%。捻缩率的大小与捻系数有关外，还与纺纱张力、车间温湿度、纱的粗细等因素有关。</span></p></section></section></section></section></section></section></section></section></section>