<p><br></p><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%; clear: both; min-height: 1em; cursor: text; font-size: 14px; 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;">&nbsp; &nbsp; 异性纤维的检测及清除是世界棉花行业所关注的中心问题。各个国家的情况不同,其解决方式也不同。至今还未找到一种有效地控制异性纤维含量的措施,这也是我国今后研究的重点。<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; 异性纤维的清理可分为子棉轧花前的检测、清除和轧花后在纺织工序中的检测、清除。异性纤维一旦混入棉花,其后的工作将极为被动和困难。因此,轧花前清除是一种非常有效的解决方式。<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; 1.色谱分析/质谱仪(GC/MS)<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; 美国在这方面的研究首屈一指,根据美国的研究结果,虽然棉花和异性纤维具有相似的机械、光学特性,但它们在化学成分上有着明显的不同。这也是成功检测出异性纤维的机理。例如子棉在加工之前需要进行烘干,烘干温度一般为140℃,而异性纤维在周围环境温度接近50℃时就会释放出气体,其释放的有机化合物的化学成分与子棉及皮棉释放出的成分有很大差别,且前者释放的数量远远大于后者。利用这一机理,可采用色谱分析/质谱仪(GC/MS)进行定性和定量检测。这种系统有很高的可靠性,反应速度快且有良好的重置性,但成本高,这种方法对我们有一定的借鉴意义,目前还不适合在棉花加工厂使用。<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; 2.输送带清理法<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; 国内的棉花加工厂,为了清除异性纤维,除了在收购时进行人工挑拣外,还有专人在喂花前,在棉垛上挑拣异性纤维。人工挑拣费时、费力,因此,目前有不少厂家采用输送带清理法,如图7-26所示。<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; 该法是将经清理机清理后的子棉,由进花口进入,由棒条辊输送子棉并将其混匀,子棉通过水平输送带向前输送,在输送带两侧各有8～10人进行翻检剔拣,将拣出的异性纤维放入布袋中。经过剔拣后的子棉由2只带轮经输送带进入轧花机配棉箱中。</span></p><p style="max-inline-size: 100%; clear: both; min-height: 1em; cursor: text; font-size: 14px; text-align: center; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><img src="http://dayaotex-img.gz.bcebos.com/article/fffspic/tu7-26.png" _src="http://dayaotex-img.gz.bcebos.com/article/fffspic/tu7-26.png" data-ratio="0.5885558583106267" data-w="367" style="max-inline-size: 100%; margin: 0px; padding: 0px; max-width: 100%; overflow-wrap: break-word !important; outline: none 0px !important; height: auto !important;"></p><section align="left" style="max-inline-size: 100%; margin: 0px; padding: 0px; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 14px; 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;">&nbsp;</span></p></section><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><p></p>