The quantitative comparison of wash fastness improvement of acid and direct dyes on wool using full backtan, syntan, and syntan/cation system

ABSTRACT

Natural tannin, synthetic tanning agent (syntan), and syntan/cationic agent were applied on wool fabric dyed with different acid and direct dyes to improve the wash fastness of dyes. In this study, a method for quantitative and exact assessment of dye removal after washing from dyed samples was used. Firstly, the optimum operating parameters for application of full backtan and syntan were determined. Then the dyed wool samples were aftertreated, using natural tannin, syntan, and syntan/cationic agent. It was found that all aftertreatments improved the wash fastness. However, aftertreatment with natural tannin improved wash fastness to the greatest extent. In the case of syntan, sequential application of cationic agent on syntaned fabric obtained further improvement in wash fastness.

摘要

天然单宁、合成鞣剂（合成鞣剂和合成鞣剂）/阳离子化剂应用于羊毛织物不同的酸性和直接染料来提高染料的耐洗牢度染色。在本研究中，使用了一种定量和精确评估染色样品洗涤后染料去除率的方法。首先，确定了全backtan和合成鞣剂应用的最佳运行参数。然后染色的羊毛样品进行处理后，利用自然鞣质、鞣剂和合成鞣剂/阳离子化剂。结果表明，所有处理后均能提高水洗牢度。但经天然单宁处理后，水洗牢度达到最大程度。在合成鞣剂的情况下，序贯应用阳离子剂对织物的耐洗牢度前景得到进一步改善。

KEYWORDS:

• Natural tannin
• syntan
• full backtan
• potassium antimony tartrate
• cationic agent

关键词:

• 天然单宁
• 合成鞣剂
• 全
• 酒石酸锑钾
• 阳离子化剂

Acknowledgment

The authors gratefully acknowledge the financial support from Isfahan University of Technology.