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Stripping agent for reactive dyes

机译:用于活性染料的汽提剂

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摘要

TEXTILE dyeing industry often faces problems of uneven or faulty dyeing and formation of color patches on the fabric which leads to rejection. Correction of such fabrics is carried out by means of stripping. Stripping is defined as any operation aimed at removing or destroying some or all of dye from the dyed textile yarn or fabric. Stripping of dyed fabric is also carried out to utilize already dyed material. Reactive dyes form covalcnt bond with the cotton fabric. This characteristics of reactive dye leads to the high resistance to color stripping. Once reactive dyes have been applied, and the unfixed hydrolyzed dye has been removed, the possibility of levelling or stripping by simple physical means almost becomes nil. For fabric dyed with heavy shades of reactive dye, a reduction of about 20-40% in depth of shade can sometimes be achieved by hydrolysis of the dye-fibre bond with alkali in presence of salt at 95°C.
机译:纺织染色行业经常面临不均匀或有缺陷的问题和在织物上形成颜色贴片,导致排斥。通过剥离进行这种织物的校正。剥离定义为旨在从染色的纺织纱或织物中去除或破坏一些或全部染料的任何操作。还进行染色织物以利用已经染色的材料。反应性染料与棉织物形成COOVOLCNT键。活性染料的这种特性导致高抗色剥离抗性。一旦施加反应性染料,并除去未固定的水解染料,通过简单物理意味着平整或剥离的可能性几乎变为零。对于用重度反应染料染色的织物,有时可以通过在95℃下在盐存在下用碱水解染料纤维键来减少约20-40%的阴影深度。

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  • 来源
    《Colourage》 |2019年第8期|62-62|共1页
  • 作者

    Naresh Saraf;

  • 作者单位

    Sarex Chemicals A division of Saraf Chemicals Ltd. Andheri (W) India;

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  • 正文语种 eng
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