The dyeing behavior of conventional and nanonylon 6 fiber with two different dyes, C.I.Disperse Blue 56 and C.I.Acid Yellow 21 was studied and their kinetic and thermodynamic properties of disperse and Metal Complex 1: 2 dyes , wa discussed. Dyeing was conducted by Turbo mat machine at 80 ° C and 100 ° C. Then, using a calibration curve plotted, with the absorbance values obtained at different times, the percentage of exhaustion, half-dyeing time,diffusion coefficient, activation energy and affinity was calculated . Given that the rate of dyeing is function of diffusion dye and dye diffusion rate according to the Fick's second law, is a function of surface to volume ratio, the rate of absorption on nano-fibers is more than conventional fibers. The results show that the diffusion coefficient is dependent of several factors, including the size of the dye molecule, physical mode fiber, temperature and etc.Therefore an increase in the size of the dye molecule decreases diffusion coefficient. Temperature also have a great impact on the diffusion and diffusion coefficient increases with increasing temperature. The activation energy values for different finest fibers are different. For dyes that had little diffusion coefficient, the activation energy was high. The high activation energy, resulting low rate of diffusion. Also in this study, drawing and calculating the slope of the adsorption isotherm affinity value is calculated. The results of adsorption isotherm of metal complex of 1: 2 according to the values obtained (K and R2) of the adsorption isotherm curve showed that the Longmuir isotherm is dominant. Its due to links salt and ionic forces were involved in the process of absorption of dyes.for disperse dye Longmuir adsorption isotherm obtained. Accumulation of dye molecules and molecular weight increases due to deviations from the ideal state is the adsorption isotherm Nernst. Keywords:1:2 Metal Complex Dyes, Disperse Dyes, Nylon, Chemical physical adsorption
