China
Africa
Explore chapters and articles related to this topic
Wool Bleaching
Published in Menachem Lewin, Stephen B. Sello, Handbook of Fiber Science and Technology: Volume I Chemical Processing of Fibers and Fabrics, 2018
Cold pad-batch processes give lower levels of whiteness but save energy and work at a greatly reduced volume. A process has been used, particularly for loose carpet wool, in which the wool is padded in the last bowl of the scouring train [25, 33, 36, 46, 47, 49, 135] or back-washing unit [25] and bleaching continued during subsequent drying and storing or processing in the dry state. In a similar process, wool impregnated in the scouring train at pH 3–5 is held for several days in a damp state [25, 36, 136]. With blanket wool the cloth is then in a particularly favorable condition for raising [25]. In a commercially established process using cold pad-batch dyeing equipment, wool tops are impregnated with peroxide in the presence of formic acid and isopropanol and stored cold for two days [137]. Damp wool must be protected from sunlight, and there is also a danger of bacterial growth [25, 58, 138].
Process optimization for pre-treatment and dyeing one bath of viscose fabric with enzyme in cold pad-batch
Published in The Journal of The Textile Institute, 2018
Yuanzhao Zhu, Weitao Zhou, Pei Xiao, Yanan Zhao, Xinmei Guan, Zhenfang Chang, Zhengping Xia, Qing Wang
We can conclude that the application of pre-treatment and dyeing one bath of viscose fabric with enzyme in the CPB method can greatly save the chemicals and energy, and reduce the environmental pollution. Under the same dye concentration 2.76%, the cold pad-batch method could save 98.13% sodium carbonate, 95% sodium sulfate, 95% enzyme, 94.29% degreaser, 95% EDTA and 97.5% water relative to the conventional method. Thus, it has a far-reaching influence on the sustainable development of dyeing industry.
Colouration of polymeric electrospun nanofibrous mats – a mini review
Published in The Journal of The Textile Institute, 2020
Awais Khatri, Shamshad Ali, Seong Hun Kim, Alishba Javeed
Cold pad batch dyeing method is the most economical and simple method as it involves only one step, that is, passage of substrate through the padder containing dye solution followed by batching for certain hours (Z. Khatri, Memon, Khatri, & Tanwari, 2011). It is an eco-friendly dyeing method as water consumption is lowest and the use of electrolyte is eliminated.