بررسي رنگرزي انتگرالي با استفاده از داده هاي طيفي

چكيده انگليسي :

89 Abstract The system integration dyeing of dyes and auxiliary chemicals are the latest innovation in the dye exhaustion Integration dyeing may be defined as the method of gradually adding the dye or the auxiliary products or both at the same time over the period of the dyeing process to control absorption in the dyeing systems which may originate fast and anomalous absorptions resulting in unleveled dyeing In practice this method is often use to improve the leveled dyeing that results when all the dye are added at the beginning of the process dyeing integration is now often used when the dyeing mechanism occurs with high affinity and can lead to rapid absorptions and irregular initial inequalities that very difficult to solve especially when migration is practically nil The kinetics of dye absorption by the fiber in these conditions is obviously different from those resulting from conventional methods where the dye and the other auxiliary are added at once at the beginning of dyeing One the other hand the absorption kinetics in an integration dyeing method is likely to be influenced by the way the dye and the auxiliary products are added as well as by other variables intervening in the dyeing process Obviously in a dyeing packaged especially when the circulation of the dye solution takes place in a single direction occur along the package fiber inequalities dye uptake These inequalities occur because at any time the dye solution as it leaves the package after having crossed has a lower dye concentration that when it enters as the fiber it is absorbed but since the absorption rate depends on the concentration of the dye logically the entrance of the package is more stained than the output thus establishing a gradient of concentration in the dyed material which in terms dyeing means a lack of equalization Many researchers are in general agreement that to obtain a uniform distribution of a fixed dye it is important to achieve a linear exhaustion of the dye According to several publications another method likely to achieve an ideal exhaustion is to add the dye or the acid gradually over the duration of the dyeing process Many researches are in general integration dyeing using absorption data for calculating concentration of dyes and their behavior for levelness of fabrics There are practical limitations in predicting dye bath concentrations and dye bath exhaustion using absorbance measurements from optical spectroscopy If a linear model is used to map absorbance to concentration then five assumptions must hold measurement repeatability linear scaling spectral additivity and linear independence of the constituent spectra and the absence of spectral morphing Violation of one or more of these assumptions will lead to errors in predicting the concentrations of dyes in a dye bath and subsequent exhaustion calculations In this work we are using spectral data for calculating concentration of dyes and their behavior By using these methods the good results can be obtained for levelness of dyeing and compatibility of incompatible dyes Key Words Integration dyeing Spectral data Levelness Compatibility of incompatible dyes PDF created with pdfFactory trial version www pdffactory com

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بررسي رنگرزي انتگرالي با استفاده از داده هاي طيفي

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