纯棉特白产品泛黄原因的分析

Causes for Yellowing of Ultra-white Pure Cotton Knitted Fabrics

纯棉针织特白产品在贮存和销售过程中会产生黄变现象。荧光增白剂的感光降解、阳离子柔软剂胺基氧化、抗氧剂的存在是产生黄变的主要原因。采取在生产和存放场所避免氮氧化物的存在 ,在纺织加工过程中避免使用含有抗氧剂成分的化学品 ,控制布面pH值在 5～ 6的措施可以避免黄变的产生。

Yellowing phenomena often appear during the storage and sale of ultra-white pure cotton knitted fabrics.The main causes include the degradation of the fluorescent bleaching agent due to exposure to sunlight,the oxidation of amino group of the cationic softener and the existence of anti-oxidant.In order to decrease the yellowing phenomena.the nitrogen oxide should be avoided in the storage place,the chemicals containing anti-oxidant should not be used during process-ing and the pH value should be controlled between 5 and 6.