CPB(Cold pad batch)Dyeing the latest technology alternative of exhaust dyeing

Показать описание

Reactive dyes are the family of dyes generally used to dye cotton, viscose, and other cellulosic fibres. However, reactive dyeing requires vast amounts of salt, water and energy. The process is also quite inefficient, leading to low fixation rates (approximately 75 %). This means that repeated rinses are needed to remove the unfixed dye, increasing both water and energy use (as rinse water is often heated). Wastewater produced from reactive dyeing contains high levels of both salt and dye, which is difficult to treat. Cold pad batch dyeing (CPB) is an alternative method of reactive dyeing that uses fewer resources.

With CPB there is no need to apply heat during the process, and no salt or humectants are needed. However, the rate of fixation depends on the ambient temperature, so in countries where there is a big difference between summer/winter temperatures, it is good practice to carry out dye fixation in a heat-regulated room.

Advantages of CPB

Compared to other reactive dyeing methods, such as jet dyeing, CPB offers several benefits:

Reduced water consumption (more so if counter-flow washing ranges are used)Reduced energy consumption, as it is done at room temperaturehigher percentage of dye fixationNo salt used – resulting in easy dye wash off and no salt being present in the effluentPre-dye checks can be carried out ensuring more fabric is dyed correctlyProductivity – one CPD machine can dye more fabric than a jet machineBetter suited to stretch fabrics and knits because it is easier to manage tension control in a small machineFabrics are smoother so no need to bio polishFabrics are stronger than bio polished equivalent

Cold Pad- Batching Dyeing or CPB Dyeing is modern dyeing technology which is energy & time saving .
সিপিবি ডাইং মেশিন
#CPB_Cold_Pad_Batch_Dyeing_Exhaust