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Wet-on-Wet Padding for Energy Conservation

We report a reconstitution method which could provide consistent shade depth and add-on in wet-on-wet pad/batch dyeing and finishing. Textile wet processing involves many steps of wetting and drying. Eliminating some of them by the wet-on-wet process could save energy. For a continuous process, due to the fast fabric movement, a wet fabric also could enhance chemical penetration for the improvement of properties and savings on auxiliary chemicals. One common problem associated with wet-on-wet process is that after padding several hundred yards of yarns/fabrics, chemical add-on is considerably decreased, resulting in the decreased shade depth or performance of the finished goods. This phenomenon is the result of water interchange in the chemical pad. Once the water interchange rate is obtained, quality of wet-on-wet finished materials could be controlled.