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利用乙二胺四乙酸(EDTA)络合的机制,在黏胶长丝的后处理压洗过程中加入EDTA,可以除去生产过程中产生的某些金属离子,增加黏胶纤维的白度,从而提高黏胶长丝的外观质量。中试结果确定了大生产中在后处理压洗线脱硫浴中加入质量浓度为15 mg/L的工业纯EDTA的生产方案。
EDTA (ethylenediaminetetraacetic acid) complexation mechanism can be used to remove some metal ions produced in the production process and increase the whiteness of viscose fibers by adding EDTA in the post-treatment pressure-washing process of viscose filament yarn Improve the appearance of viscose filament yarn. The results of the pilot test confirmed the production of industrial pure EDTA with a mass concentration of 15 mg / L in the desulfurization bath of the post-treatment washing line in large-scale production.