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Waterless dyeing of zipper tape using pilot-scale horizontal supercritical carbon dioxide equipment and its green and efficient production
- Huang, Tingting, Kong, Xiangjun, Cui, Hongsheng, Zhang, Tian, Li, Wei, Yu, Pei, Lin, Jinxin
- Journal of cleaner production 2019 v.233 pp. 1097-1105
- autoclaves, carbon dioxide, color, commercialization, drying, dyeing, dyes, staining, supercritical fluid extraction, temperature
- In this study, pilot-scale horizontal equipment for zipper tape dyeing in supercritical carbon dioxide (SC-CO2) was designed and successfully constructed. Two horizontal dyeing autoclaves arranged side by side and a color-matching kettle to accelerate the dye dissolution were the two most appealing characteristics of this equipment. The products dyed under the conditions of a temperature of (90 ± 2) °C, pressure of (23 ± 1) MPa, and time of 50 min, presented an excellent color fastness of staining, drying, and wetting, which were all rated at grades of 4–5. The K/S value of the products dyed in SC-CO2 was 6.38, while a value of 5.25 was found in water, even the amount of dyes in the SC-CO2 was lower. The further commercialization of waterless dyeing from pilot-scale studies would have great practical and strategic significance.