Dyeing Process Color Dynamic Model And Simulation System

Currently, batch dyeing is the main method of dyeing in most of small and medium printing and dyeing enterprises. But, because of lots of technological parameters effecting color difference in the dyeing process and deficiency of color-difference mathematical model for controlling, batch dyeing has low production efficiency but high pollution. Therefore, building up the color-difference mathematical model of dyeing process is the key of technology of advancing production efficiency and the prerequisite for cutting down pollution problem in its source.According to the characteristic of batch dyeing process, dye's uptake kinetics model, color-difference mathematical model are built up in this thesis by combining mechanism modeling with experiential modeling, based on dyeing and finishing technology, computer color-matching theory and the characteristics of printing and dyeing enterprise dyeing and finishing process. Finally, computer color-difference simulation system is developed. This simulation system can dynamically show the color of fabric and its color difference in dyeing process. It provides consistent foundation and valuable experience to the studying of color-difference online measuring and controlling.This paper mainly works on following aspects:1. Checking into the mechanism process of knitted fabric dyeingStudying the influence on dyeing effect of the adsorption and diffusion in dyeing process from perspectives of dyeing thermodynamics and kinetics, a more easily programmed and more accurate dyeing process dye uptake kinetics model of knitted fabric is built up.2. Studying on the algorithm of computer dynamic color-measuringAccording to the batch dyeing process, computer dynamic color-measuring algorithm, which will change the traditional static color-measuring algorithm and realize dynamic prediction of fabric color in dyeing process, is established by using mechanism modeling and experiential modeling method, taken reactive dyes dyeing-up pure cotton to be research object and combined dyeing chemical theory with theory of computer matching color. 3. Studying on the color-difference kinetics model of batch dyeing progressBased on dye uptake kinetics model of dyeing process and computer dynamic color-measuring algorithm, combining with color difference formula: CIE1976L*a*b* which is suitable for color difference calculation of textiles, color difference kinetics mathematical model of batch dyeing process is built up, which provides theoretical foundation for developing dyeing process computer color difference simulation system.4. Developing dyeing process computer color difference simulation systemA Computer color difference simulation system of dyeing process is developed based on actual characteristic and demand of the dyeing process and those mathematical models built up before. It can dynamically show the color of fabric and its color difference with the sample in the dyeing process. It can also provide an effective method to solve the problem that fabric color and color difference was unable to measure in the traditional batch dyeing process and provide theoretical and valuable experiences for studying on batch dyeing process color difference on-line measurement and control.This paper is very important for effective control of the color difference in dyeing process. It may have the contributions to enterprises such as improving rate of end products, cutting down products cost. Therefore, in order to improve the producing condition of modern dyeing, it's key technology to develop a color difference kinetics model and a simulation system for improving the level of automation in printing and dyeing textile industry.