Papers by Keyword: Dyeing

Abstract: Silk fabric has been dyed with natural indigo (Indigofera tentoria) in absence and present ferrous sulfate mordant by using post-mordanting and pad dyeing processes. It was observed that with an increase in the dye concentration, the ultraviolet (UV) protection factor (UPF) values ranged between good and very good for the silk fabric. Silk fabrics dyed with natural indigo showed green shade. The level of fastness properties were ranged from good to very good. The results confirmed that natural dyes from natural indigo with ferrous sulfate have potential applications in fabric dyeing and in producing UV-protective silk fabrics.

Abstract: This research studied the finishing process of nano TiO₂ on PET fabric by thermal treatment. The effect of different curing temperatures of nano TiO₂ treatment on yellowness, hydrophilicity, self-cleaning of red wine stains and disperse dyeing properties of PET fabric was investigated. The results show that curing of nano TiO₂ on the PET fabric should be done at the temperature not less than 180°C. With nano TiO₂ treatment, the hydrophilicity and self-cleaning properties of PET fabric were increased. The effect of nano TiO₂ treatment on the dyeing properties of three disperse dyes, viz. C.I. Disperse Red 60, C.I. Disperse Violet 33 and C.I. Disperse Red 167, was examined. Nano TiO₂ treatment influenced on the color strength of each dyes in a different way.

Abstract: Cotton fabric was dyed with Liyuan Blue FL-RN reactive dye. The dye exhaustion and fixation percentages were calculated for all light, medium and dark shades. The dye shows very good exhaustion and fixation properties. Dyed samples were tested for light fastness property as per international standards. The results indicates the dye has a good light fastness property. The effect of UV absorber was studied in order to improve light fastness property. Cationic UV absorber CANFIX SUN was applied on the dyed cotton fabric by exhaust method. The results show that the color depth was similar after UV absorber treatment. In all the cases the use of UV absorber improved the light fastness of dyed fabrics as compared to untreated dyed samples.

Abstract: Chitosan, a naturally available biopolymer, was used as finishing agent to increase dye uptake and color fastness of cotton fabrics. Thian King leaves extract a natural dye was applied on cotton fabrics after chitosan treatment. The whiteness index and tensile strength of samples were measured to study the effect of chitosan application. The color of dyed samples was investigated in term of the colorimetric parameters (L*, a*, b*, ∆E) and K/S values. The color fastness to washing, rubbing and light of dyed samples was determined according to AATCC test method. The results showed that the chitosan concentration enhances the whiteness index and tensile strength of the treated cotton fabrics. Chitosan treatment showed increase dye uptake of cotton fabrics. Fastness properties of these to washing, rubbing and light have also been discussed.

Abstract: Adsorption kinetic study of C.I. reactive blue 19 onto cotton was carried out in SDS-CTAB reverse micelles. The data of adsorption kinetics were examined using pseudo first-and second-order kinetic models. It was found that the adsorption kinetics of dye on cotton with diffusion controlling follows the pseudo first-order kinetic model.

Abstract: By exploring the acid yellow G to buck dyes dyeing was carried out on the fast-growing Yang path of material。Through orthogonal test to determine the optimum technology of dyeing;Test results are as follows。Dyed with acid dyes, test optimization process is dye mass fraction is 0.3%, dyeing time for 4 days, penetrating agent mass fraction is 0.05%, the dye solution pH value of 5.2.。

Abstract: Kenaf fibers were dyed with capsanthin using supercritical carbon dioxide. Response surface methodology, based on a three level and three variable small central composite design, was employed to obtain the best possible combination of dyeing time, temperature and pressure for maximum K/S value.The optimum conditions were as follows: dyeing time of 60 min, temperature of 119.99 °C and pressure of 30 MPa. Under these conditions, the K/S value was 17.54, which was similar to the value predicted by the model.

Abstract: In this paper, the effects of dyeing temperature, pressure, and time on mechanical property of wool fiber were investigated in supercritical carbon dioxide fluid. In addition, On the basis of single factor experiment, the optimal technological conditions for dyed wool fiber was optimized by employing Box-Benhnken Design experiment, and the optimal conditions were as following: dyeing temperature 110 °C, dyeing pressure 25 MPa and dyeing time 75 min.

Abstract: The dyeing process of bamboo viscose fiber with two vegetable dyes of Gardenia yellow (GY) and sodium copper chlorophyll (SCC) was studied. The optimum dyeing conditions in the absence of mordants were as follows: neutral medium; 70 °C for GY, and 80 °C for SCC. The trials of different mordanting methods showed that post-mordanting gave the highest color depth. Thus the effects of mordant dosage, temperature, pH and time for post-mordanting on the color depth of the dyed fiber were further discussed. The satisfactory effects were achieved in the case of low mordant dosage, low temperature, and neutral medium for GY dye, whereas the opposite conditions should be applied for SCC dye.

Abstract: A natural yellow pigment is extracted from carthamus tinctorious and the stability of the pigment on metal ions and the pH change are studied by visible spectra analysis. The extracts are applied to dye silk fabric and the dyeing properties are tested. Results show that the maximum absorption wavelength of the extract changed with pH value and metal ions. The safflower yellow pigment has good property for silk dyeing, the mordant dyed silk fabrics can obtain a deeper color yield and a better washing and rubbing color fastness.