What is reactive dye cold pad batch dyeing

The cold-rolling process is a processing process at room temperature. Because the cold-rolling process technology has many advantages such as low investment cost, low energy consumption, low water consumption, high flexibility and productivity, strong process adaptability, and small loss of fabric strength, it is currently used in cotton It is widely used in pre-treatment, dyeing, printing and finishing in fabric dyeing and finishing.

The pre-treatment process of the cold-rolled pile mainly includes desizing, scouring and bleaching. The steaming pile is changed to room temperature pile, which greatly saves energy and equipment investment, and is suitable for small batch and multi-variety processing requirements.

The cold pad-batch dyeing process is short, the equipment is simple, and the environmental pollution is small. Because it is not dried and steamed, it saves energy. It has a small liquor ratio and high coloring rate (the fixation rate is 15- higher than that of the conventional pad-steaming method. 25%), there is no such characteristics as dye migration maladies, and it is especially suitable for the production of multiple varieties and small batches such as tension-sensitive and impermeable dyeing. In recent years, my country's energy costs have increased, the quality of dyes has improved, and new varieties have been launched on the market. The use of cold pad-batch dyeing technology in printing and dyeing factories has become more and more common.

Cold pad batch dyeing characteristics

The cold pad-batch dyeing process is short, the equipment is simple, and the environmental pollution is small. Because it is not dried and steamed, it saves energy. It has a small liquor ratio and high coloring rate (the fixation rate is 15- higher than that of the conventional pad-steaming method. 25%), there is no such characteristics as dye migration maladies, and it is especially suitable for the production of multiple varieties and small batches such as tension-sensitive and impermeable dyeing.

Cold heap dyeing evaluation

1. Although the whole process is semi-continuous, the production efficiency is very high because the preparation work is completed before the machine.

2. Dyeing and fixing are all done at room temperature. Although water washing requires heating, the cold dyeing has a high fixing rate, less hydrolyzed dyes, and easy cleaning. Compared with pad dyeing that requires intermediate drying and steaming, it greatly saves water. , Steam energy, alleviating the pressure of sewage decolorization.

3. The cold dyeing equipment is simple, less investment, and small area. Although it is stacked on the site after rolling, it can be flexibly arranged according to the workshop situation.

4. Cold dyeing is not only easy to clean by itself, but also allows the planned scheduling to separate and distribute the machines, saving the cleaning time of other machines due to frequent change of varieties.

5. Since cold dyeing is slowly fixed at room temperature for a long time, migration will not occur, regardless of the thickness of the fabric, the permeability of the dye is excellent, so the color of the product is more pure, completely solving the problem of corduroy exposed, and satisfying the market need.

6. As long as the process is properly mastered, the problem of dyeing consistency of conventional colors, especially difficult colors, can be solved.

7. The stacking of cold pile fabrics on the A-frame greatly eases the turnover pressure of the cloth storage box.

8. Dyeing and cold dyeing also have problems such as suspicious seam head print, hard hand feeling, and not intuitively padding in lofting.