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Studies on the Testing Methods for Color Fastness to Perspiration and for Color Fastness to Light and Perspiration for Reactive Dyeings of Cotton Fabries

棉织物活性染色耐汗渍色牢度和耐光汗渍色牢度测试方法的研究

基本信息

批准号：
07558004
负责人：
OKADA Yasuyo
金额：
$ 2.24万
依托单位：
Otsuma Women's University Junior College Division
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1997
项目状态：
已结题

项目摘要

On immersing cellophane dyed with reactive Cu-complex azo dyes in aqueous His, the copper atoms of the dye were abstracted the His and the absorption spectra of the dyes were changed with time depending upon the conditions of immersion. The rates of color variations of Cu-complex azo dyes on cotton fabrics were faster than those on cellophane, although the order of the rates of the dyes on both samples were similar to each other.The testing methods for color fastness to light and perspiration including JIS L0888 methods and their improved ones were applied to cotton dyeings by 14 reactive dyes to examine whether or not these methods could assess the potential properties of dyes. The effects of substrate, water, and the pH of aqueous artificial perspiration in which the test fabrics were immersed on the intial and subsequent fading for these dyes were analyzed in terms of their potential properties. On exposure, many dyes on cotton fabrics which are wet and contain some substrate undergo initially oxidative fading from the surface and subsequently reductive one depending upon their potential properties. ATTS and LACT methods distinguished sufficiently the grading of these dyes, while JIS and Mizuno methods did insufficiently.When no His existed on cellulose, Cu-complex azo dyes showed small fading on exposure irrespective of whether they were wet or dry. The color variations of the dyes by immersing aqueous His and/or EDTA were much larger than those by exposure. When His existed on fabrics, His had large effects on fading especially in case of wet fabrics to give large color variation. In some cases, the variations by exposure became larger than those by the immersion. But, the large color variations after exposure were found to be considerably due to the yellowing of cotton fabrics by His, when His was singly used.

用活性铜络合偶氮染料染色的玻璃纸浸没在水溶液中，染料中的铜原子被萃取，染料的吸收光谱随浸没条件的不同而随时间变化。铜络合偶氮染料在棉织物上的变色速率比在玻璃纸上的变色速率快，但两者的变色速率顺序相似。将JIS L0888法及其改进的耐光牢度和耐汗牢度测试方法应用于14种活性染料的棉织物染色，考察这些方法能否评价染料的潜在性能。根据染料的潜在特性，分析了衬底、水和水人工汗液的pH值对这些染料最初和随后褪色的影响。在暴露时，许多湿的棉织物上的染料含有一些基材，首先从表面发生氧化褪色，随后发生还原性褪色，这取决于它们的潜在性能。ATTS和LACT方法能够充分区分这些染料的分级，而JIS和Mizuno方法则做得不够。当纤维素上不存在His时，铜络合偶氮染料无论在湿或干条件下均表现出轻微的褪色。浸渍His和/或EDTA的染料颜色变化比暴露的大得多。当他存在于织物上时，他对织物的褪色有很大的影响，特别是在湿织物上，他会产生很大的颜色变化。在某些情况下，暴露的变化比浸泡的变化更大。但是，暴露后的大颜色变化很大程度上是由于His在单独使用时使棉织物变黄所致。