<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;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;">　　答 采用分散／活性一浴法轧染时，如果化料、染色、工艺条件都很合理的话，只有在前处理上找问题。前处理时如退浆不净，产生黄斑疵病的可能性较大，如检验退浆基本是良好的，再从煮练效果去检查。若检查坯布亦很正常，无碱斑、钙斑等不良现象，那么要查漂白工艺，如果采用双氧水漂白，棉纤维中含氮物质及果胶质是不易去除的，而这些未能去除干净的物质在高温焙烘及与煤气中的s、NO</span><sub style="max-inline-size: 100%; margin: 0px; padding: 0px; font-size: 10.5px; overflow-wrap: break-word !important; outline: none 0px !important;">2</sub><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;">、sO</span><sub style="max-inline-size: 100%; margin: 0px; padding: 0px; font-size: 10.5px; overflow-wrap: break-word !important; outline: none 0px !important;">3</sub><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;">等作用下，与染料、助剂能发生复杂的化学反应，在染色焙烘时就能出现黄斑、黄块等疵病。如果用氯漂能去除这些黄斑、黄块，就可证实是棉纤维中含氮物质及果胶质没有去净。因为氧漂对含氮物质的去除能力较差，而次氯酸钠与含氮物质相互作用，使多缩氨基酸键断裂，生成一系列的氯氨基酸。这些氯氨基酸又因与过剩的碱作用而转化成可溶性钠盐而被洗去。从双氧水和次氯酸钠的氧化还原电位来看，在碱性范围内次氯酸钠的氧化一还原电位比双氧水高得多。所以，双氧水氧化不了的杂质，次氯酸钠可以氧化去除。为此，此类坯布在染色前应采用次氯酸钠漂白，有效氯3～4g／L，即可避免黄斑的产生。</span></span></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>