活性染料耐H202稳定性很差，染浴中一旦有H202带入，染料的活性基团就会遭到破坏，造成色差、色花等染疵，因而染色前必须将织物及水浴中的H202清除。生物酶脱氧法快捷有效，而且节能、减排、增效优势突出。
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1. Question raising</p
Pure cotton knitted gray fabrics usually contain more cotton fiber companions (such as waxy substances, pectin substances, ash, etc.). These companions greatly affect the wettability and dyeability of cotton fibers, so they must be passed through before dyeing. Refining and bleaching to remove it �针织织物由于经纱不上浮，加之组织规格松软，坯布的炼漂通常在染色机中进行，而后经水洗再以活性染料染色� �纯棉机织物染艳亮的中浅色泽时，也常会因炼漂半制品的白度不足，在染色前再补做一次复氧漂，经水洗后再以活性染料染色� �</p
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It is worth noting that in actual production, this process mode of oxygen bleaching before dyeing, washing with reactive dyes and then dyeing with reactive dyes generally suffers from poor color stability (shade, light), poor reproducibility, and inaccurate enlargement of small samples. Problems such as obvious color difference between tanks and uneven color (color flowers) (reactive dye dyeing also has the problem of slow fading during the washing process) �</p
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2The root of the problem</p
Experimental results: </p
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无论是低温型或高温型活性染料，还是中温型或热固型活性染料，在含有H202的染浴中染色，其得色深度都会明显下降，仅下降幅度不同。而且，H202含量越高，下降幅度越大。各种类型的活性染料，在浸染染色中耐H202的稳定性都比较差。
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There are two reasons for this: </p
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(1)部分染料的发色团或活性基，遭到H202的破坏，使染料消色或失去上染能力。
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(2)部分染料-纤维素的结合键发生了断裂，使已上染的染料脱落（一般说活性基的化学活性越强，染料-纤维键越容易断裂）。这可从以下实验中得到证实。
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Experimental method: </p
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Divide the reactive dye dyeing fabric with a depth of 1.25% (o.w.f) into two parts (each weighing 2 grams) and place them respectively in a dye-free dyeing auxiliary bath (sodium hexametaphosphate) with a bath ratio of 1:50 1.5g/L, salt 40g/L, color-fixing alkali agent: medium temperature �和高温型染料为纯碱20g/L，低温型染料为纯碱5g/L+固体烧碱lg/L），其中之一外加100%H20210mg/L，而后分别按染料类型所要求的染色温度处理50min，净洗� �</p
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以不加H202的处理样深度作参比样(100%)，与加H202的处理样深度相对比较。处理样的相对深度以DatacolorSF，600x测色仪检测。
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Table 1 H202 resistance stability of various types of reactive dyes and cellulose binding points</p
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注：中温型染料为上海纺科化工公司产品，高温型染料为台湾永光化学工业股份产品，低温型染料为上海安诺其纺织化工股份产品。
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Table 1 data display: </p
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在含H202的染浴中，各种类型的活性染料与纤维素纤维业已形成的结合键，也会产生一定程度的“断键”现象。但从整体上看，其“断键”程度相对较小。这说明H202对活性染料染色结果（减色，变色）的影响，主要是因染料的发色团或活性基遭到破坏所致。
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From the above experimental analysis, we can know: </p
</p
(1)活性染料耐H202稳定性差，是染色前进行氧漂经水洗再活性染料染色，容易产生色泽不稳定问题的症结所在� This is because after the fabric is rope-shaped oxygen bleached in a jet overflow dyeing machine or an airflow dyeing machine, the H202 contained in the fabric is usually difficult to clean thoroughly. Once it is taken into the downstream dye bath, it will inevitably cause color (shade, light) changes. fluctuation �</p
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(2)活性染料与纤维素纤维的结合键所存在的氧化性“断键”现象，是活性染料的染色物在服用洗涤过程中会产生逐渐落色的根源。这是因为，常用洗剂中一般都含有过硼酸钠、过碳酸钠等氧化物，它们会不同程度地催化活性染料与纤维素纤维结合键断裂的缘故。
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3. Response to problems</p
To eliminate the negative impact of H202 on reactive dye dyeing results, there are two effective measures: </p
</p
3.1 Washing and deoxidation method</p
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染色前炼漂或氧漂后，采用热水洗→热水洗→溢流冷水洗，确认H202已充分洗尽后，方可以活性染料染色。
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该法耗能大，排污多，成本高，显然不符合当今“节能，减排，增效”的染整理念。
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3.2 Biological deoxygenation method </p
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染色前炼漂或氧漂后，采用冷水洗→中和、脱氧、染色一浴法工艺。
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(1)本工艺所用生物酶为过氧化氢酶� �它是由非病原性的微生物经深度发酵制成的� It is specific and only works with H202. It can quickly decompose H202 into water and oxygen: 2H202→catalase→H20+02. It has good compatibility with fabrics, dyes, and auxiliaries (surfactants). , has no effect �</p
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过氧化氢的佳实用条件为：温度35～50℃，pH值6.5～7.5，浓度诺和R过氧化氢酶10L 0.25～0.5g/L（根据需要）。
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(2) The operation process of biological enzyme deoxidation method (taking the jet overflow machine as an example): </p
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① 织物经炼漂或漂白后，放掉漂液。
② 先用冷水洗涤约10min，排掉洗水。
③ 加入清水，边运转边加入适量醋酸，调PH至6.5-7.5，同时升温至40-50℃（根据需要）。
④ 加入生物酶，运转脱氧10-20min，不排液。
⑤ 加入染色用助剂，染料，调温至染料所需要的温���, and heat preservation and dyeing.
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(3) Catalase can quickly and effectively remove residual H202. Even if the concentration is excessive, it will not cause negative effects on fabrics or dyeing. Moreover, after H202 is decomposed, it only generates water and oxygen, and does not produce harmful substances, so it is a brand new green technology �</p
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(4)由于该工艺在氧漂后，只需要做一道冷水洗，中和脱氧染色可同浴进行，所以，与洗涤脱氧法相比，它具有突出的“节能，减排，增效”优势。经测标，时间可节省50%，清水可节省70%，用电可节省50%，用汽可节省20%。
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4Conclusion</p
活性染料对H202非常敏感� �染浴中一旦有H202存在（即使浓度很低）活性染料的活性基因就会不同程度地遭到破坏，从而产生明显的色差，色花的染疵� Therefore, it is extremely important to completely remove the residual H202 from the fabric and its water bath before dyeing. Catalase deoxidation is the best process choice. It not only deoxidizes quickly and effectively, but also has significant “energy saving, emission reduction, and efficiency improvement.” Comprehensive effect �</p
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