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进步印染专用荧光增白剂功效的方法有哪些


网址:http://www.scvc8.com  时间:2018-10-25 10:22:43

进步印染专用荧光增白剂功效的方法有哪些
What are the methods of improving the efficacy of fluorescent whitening agents for printing and dyeing?
影响荧光增白剂增白作用的主要因素有:被增白基质的白度、毛效和吸色率,工作液的水质,荧光增白剂的增白作用,增白时工艺参数的操控等。
The main factors affecting the whitening effect of fluorescent whitening agent are whiteness, capillary effect and color absorption of whitened substrate, water quality of working fluid, whitening effect of fluorescent whitening agent, and control of technological parameters during whitening.
被增白织物的影响:荧光增白剂的增白是光学上的补色、增亮,它不能代替化学漂白;含有色素、底色深暗的纺织品假如不经过化学漂白而单用荧光增白剂处理,则得不到抱负的增白作用。
Effect of Bleached Fabrics: The brightening of fluorescent whiteners is an optical complement, brightening, it can not replace chemical bleaching; textiles containing pigments, dark background, if not chemically bleached and treated with fluorescent whiteners alone, will not have the desired brightening effect.
荧光增白剂的泛黄点:照射在织物上的紫外光是有限的,因而,经过荧光增白剂反射出来的蓝光也是有限的,当荧光增白剂到达某一数值时,所反射出来的蓝光到达*值,若再添加荧光增白剂的用量,则织物的白度不光不能添加,相反还会跟着荧光增白剂用量的添加而使白度有所下降。荧光增白剂所反射出来的蓝色光刚好与织物所反射出来的黄光强度持平时,则织物看上去很白。不同织物对光的反射量不同,其反射出来的黄光强度也不同,因而,荧光增白剂在不同织物和不同光源下其泛黄点(*用量)是不同的。
The yellowing point of the fluorescent whitening agent: the ultraviolet light irradiated on the fabric is limited, so the blue light reflected by the fluorescent whitening agent is also limited. When the fluorescent whitening agent reaches a certain value, the reflected blue light reaches a * value. If the amount of fluorescent whitening agent is added, the whiteness of the fabric can not be added. Conversely, whiteness will be reduced with the addition of fluorescent brighteners. The blue light reflected by the fluorescent whitening agent is just the same as the yellow light reflected by the fabric, so the fabric looks white. The yellowing point (* dosage) of fluorescent whitening agent is different under different fabrics and different light sources.
温度的影响:进步温度可以进步荧光增白剂的分散速率,加快荧光增白剂的上染率,调节工作液温度时升温不能过快,要确保染液的温度均匀一致。进步温度可以使荧光增白剂的聚集体发作解聚,从而有利于荧光增白剂分子向纤维内部分散,一起,还可以防止荧光增白剂在纤维表面上凝集而发生的一种“泛黄”现象而形成增白效应的下降。荧光增白剂VBL用于棉织物增白时,浸染增白温度操控在2050T;,轧染增白温度操控在4045°C,皂浴增白温度操控在8090°C时比较适合。
Temperature effect: progressive temperature can improve the dispersing rate of fluorescent whitening agent, speed up the dyeing rate of fluorescent whitening agent, adjust the temperature of working fluid can not rise too fast, to ensure that the temperature of dye solution is uniform. The progressive temperature can make the aggregates of the fluorescent whiteners disaggregate, which is conducive to the dispersion of fluorescent whitening agent molecules into the fibers. At the same time, it can prevent the fluorescent whitening agent from agglutinating on the fiber surface and forming a "yellowing" phenomenon, which will reduce the whitening effect. When fluorescent whitening agent VBL is used for cotton fabric whitening, the temperature of dipping and dyeing whitening is controlled at 2050T; pad dyeing whitening temperature is controlled at 4045 degree C, and soap bath whitening temperature is controlled at 8090 degree C.
水质的影响:硬水能与某些荧光增白剂结合,生成黄绿色的不溶物,不光会形成荧光增白剂的糟蹋,还会严重影响增白作用。工作液中的铁、铜、锌、锰等重金属离子会对阴离子型荧光增白剂有不同程度的影响,使荧光增白剂形成不溶或难溶的磺酸金属盐而发生沉积,或者使阴离子型荧光增白剂的吸收光谱向深色改变而抑制荧光,使织物无法漂白和增白。
Effect of water quality: Hard water can combine with some fluorescent whitening agents to form yellow-green insoluble substances, not only will form the waste of fluorescent whitening agents, but also seriously affect the whitening effect. Heavy metal ions such as iron, copper, zinc and manganese in working fluid have different effects on anionic fluorescent brighteners, which cause the fluorescent brighteners to form insoluble or insoluble sulfonic acid metal salts and deposit, or change the absorption spectrum of anionic fluorescent brighteners to dark color to inhibit the fluorescence and prevent the fabric from bleaching and bleaching. Whitening.
染浴pH的影响:染浴pH也是影响增白作用的重要因素,不同pH的染浴将直接影响荧光增白剂的稳定性、溶解性及与纤维的亲和力。同一荧光增白剂在不同的织物上以及在相同织物上采纳不同的增白工艺。因而,在运用荧光增白剂曾经,要经过小样实验来断定其适合的pH范围。
The influence of dyeing bath pH: dyeing bath pH is also an important factor affecting whitening effect, different pH dyeing bath will directly affect the stability, solubility and fiber affinity of fluorescent whitening agent. The same fluorescent brightener will adopt different whitening processes on different fabrics and on the same fabric. Therefore, in the use of fluorescent whitening agent, we have to go through the small sample experiment to determine its suitable pH range.
本文由山东吉凌化工178彩票注册http://www.scvc8.com整理,对荧光增白剂厂家有兴趣的朋友可以关注我们的栏目,我们将为您提供比较新荧光增白剂新闻知识.
This article is compiled by Shandong Jiling Chemical Co., Ltd. http://www.scvc8.com. Friends interested in fluorescent brightener manufacturers can pay attention to our column, we will provide you with the latest fluorescent brightener news knowledge.

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