The Study Of Microcapsule Dyeing On Cashmere

Cashmere, a kind of textile industry, is a rare precious raw material, Known as "the crown of fiber, soft gold", and its products soft, comfortable, warmer and so on. Cashmere dyeing products (especially light color products) has sheep skin darker point, affecting the appearance quality of products. This subject focuses on the researching and solving the problems of the difference generated in dyeing of cashmere and skin. By adding chemical additives to form a microcapsule coated film of skin points’surface, clogging the capillary pore of skin point. At the same time, it can make dyes microencapsulated and form microcapsule granule which has the larger size than skin points, blocking the dye into the skin capillary internal. Thereby reducing the dyeing differences between the dyes on cashmere and on the skin points, that make the dyed samples achieve the same color effect on skin points and cashmere.In this paper, through the thermodynamic analysis of microcapsule dyeing, we found that the process increasing the dye absorption rates of fiber, but not influencing the affinity of dye and fiber, i.e. does not change its adsorption characteristics. Study on microcapsule dyeing process parameters (acid, additive dosage, initial dyeing temperature, dyeing bath ratio, heat preservation time and temperature) on the dyeing effect. Then optimizing and determining the optimal dyeing process of dyeing the cashmere fiber in light products is as follows. The amounts of formic acid is1.3%(owf), the content of J(0.1%) is2%(owf), the content of DL was0.5%(owf), P(1%) is2%(owf), A was1.3%(owf), the beginning temperature is30℃, dyeing bath ratio is15:1, insulation95degree Centigrade30minutes.Testing the application of microcapsule dyeing technology after the dyeing rate curve found this technology can remarkably improve the dyeing rate. By testing traditional dyeing technology and new technology process, that microcapsule dyeing technology resolve the conditions on dyed samples, can achieve the same color effect on skin points and cashmere. The microcapsule dyeing of cashmere are Compared with traditional dyeing, its single fiber strength of dyed products increased, breaking elongation is superior to the traditional dyeing sample. The alkaline solution of microcapsule dyeing products is lower than traditional dyeing sample. Test of traditional dyeing technology and new technology of cashmere dyeing fastness, the former is well.After a lot of tests, found that microcapsule dyeing technology can resolve the color problem in the light color dyeing of cashmere and skin points. It can realize the exhaustion stage of rapid warming, reduce energy consumption and pollution. The final dyed products of new and traditional dyeing process have the same color and color fastness on the same good lines. Single fiber strength of dyed products increased, breaking elongation is superior to the traditional dyeing sample. The spinning end breakage rate, improve the spinning rate, reduce yarn defects, can improve the overall strength of the fabric, the fabric quality is improved, extend the fabric wearing time. The microcapsule dyeing not only improve product quality and added value radically, but also have a certain economic benefit.