Cold pad-batch dyeing process of loose fiber

Abstract

The invention belongs to the technical field of loose fiber dyeing and relates to cold-pad batch dyeing process for loose fibers. The cold-pad batch dyeing process for loose fibers comprises the steps of soaking and squeezing, rotating type cold-patch treatment, pressing and water squeezing and post-treatment. The loose fibers are soaked and squeezed in a twice soaking and once squeezing mode, the rotating type cold-patch treatment is then conducted, the loose fibers are pressed and water is squeezed out after the rotating type cold-patch treatment is conducted, and after the water and dye in a loose fiber cake or loose fibers are squeezed out, the loose fiber cake or loose fibers are sent for post-treatments of drying and the like. The cold-pad batch dyeing process for loose fibers is applied to cold-pad batch dyeing of the loose fibers and has the advantages of being uniform in dyeing, small in water consumption and the like. In addition, procedures are simple.

Description

Technical field [0001] The invention relates to a loose fiber cold pad-batch dyeing process, belonging to the technical field of loose fiber dyeing. Background technique [0002] The bulk fiber is usually dyed by dyeing vat. The bulk fiber can be dyed quickly by adding dye accelerators and other auxiliary agents. However, the dyeing process requires a large amount of salt or sodium sulfate and other dye accelerators, which increases the dyeing cost and follow-up Water washing cost, additional power supply is needed to provide a large amount of steam during processing, with large bath ratio, many additives, high cost, high energy consumption and high water consumption; cold pad dyeing mainly includes dipping, stacking and fixing and washing. In this stage, the fabric is soaked in the dyeing solution at low temperature, then stacked in rolls, stacked for a certain period of time and slowly rotated to complete the process of dye absorption, diffusion and fixation. Finally, the dyein...

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Problems solved by technology

[0002] Loose fibers are usually dyed by dyeing vats, and the loose fibers can be dyed quickly by adding dye accelerators and other auxiliary agents, but the dyeing process requires a large amount of dye accelerators such as salt or sodium sulfate, which increases the dyeing cost and subsequent The cost of water washing requires an additional power supply to provide a large amount of steam during the processing process. The bath ratio is large, the additives are many, the cost is high, the energy consumption is large, and the water consumption is high. Cold pad-batch dyeing mainly includes dipping, stacking and water washing. In the first stage, the fabric is soaked in the dye solution at low temperature, and then piled up in rolls, piled up for a certain period of time and slowly rotated to complete the process of dye adsorption, diffusion and color fixation, and finally washed with water to complete the dyeing. This dyeing method is only It only needs to add a small amount of lye, avoiding the defects of many dyeing accelerators and large water consumption in the dyeing process, and the cost and energy consumption can be greatly reduced, but based on conventional cognition and the technical status of cold pad batch dyeing , cold pad-batch dyeing is only suitable for continuous structure fabrics or fabrics, so cold pad-batch dyeing is only suitable for dyeing of continuous structure materials such as fabrics or fabrics. The loose fibers in a discontinuous state cannot be piled up during the stacking process. Therefore, cold pad-batch dyeing is not suitable for loose fiber dyeing

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