紫羊绒脱色工艺及其染色性能

Research of decolorization process and dyeing property of purple cashmere

在确定紫羊绒的脱色工艺,探究紫羊绒脱色前后的结构变化及纤维上基团变化的基础上,测定了脱色前后羊绒的SEM、红外性能,以及脱色后羊绒白度以表征脱色效果;测定脱色前后羊绒的克重损失,并对羊绒脱色前后使用活性染料XBR和活性染料K-NG进行染色实验。研究结果表明:羊绒脱色后具有较好的白度,白度值达到70.01%,脱色后羊绒本身基团没有改变,对于纤维中的肽键破坏较小,羊绒纤维纵向和横向均无较大变化,对纤维损伤较小,克重损失为4%左右。脱色后羊绒的染色性能优异,对于活性染料XBR和活性染料K-NG上染百分率分别达到95.05%和75.14%,表观染色深度分别为1.24和4.05。

The purpose of this paper is to determine the process of purple cashmere decolorization of purple cashmere decolorization and structure of cashmere fibers before and after bleaching. The cashmere group changes, SEM and infrared properties were measured. The weight loss after bleaching was determined. The cashmere was dyed with reactive dye XBR and reactive dye- K-NG. The results showed that： after decolorization the cashmere had better whiteness, brightness value reached 70.01; after decolorization the cashmere itself groups did not change, for the destruction of small peptide fiber, cashmere fibers in longitudinal and transverse direction were no major changes, the fiber damage was small, the weight loss was only about 4 % . After decolorization, the dyeing properties of cashmere was excellent for reactive dye XBR and reactive dye K-NG, the dyeing percentage reached 95. 0 5 % and 75. 14% respectively, the apparent depth of dyeing were 1. 24 and 4. 05 respectively.