Discussion On The Application Technology Of Low Alkali Cold Pad Batch

For cotton and Cotton woven fabric Textile products were treated by low alkali cold pad batch process. The LD pretreatment auxiliaries of the low alkali cooled reactor ensure that the treatment effect is completed in two steps, and greatly reduce the amount of caustic soda, reduce the damage of concentrated alkali to fibers, and reduce the alkalinity of sewage discharge.

Cold pad batch pretreatment is an economical, environmentally friendly and relatively short production process, because it uses two simple rolling grooves to roll, and then stacked through the "A" rack and does not use steam. The entire scouring process can save a lot of steam and reduce a lot of investment, so it has increasingly become the first choice worker for printing and dyeing enterprises. Art. In the traditional cold pad batch pretreatment process, in order to ensure the effect of scouring treatment, various factories have to use high concentration caustic soda in the cold pad batch process in order to save a lot of steam. This has resulted in excessive damage to cotton fibers (including other fibers), resulting in high washing pressure and high alkali content in sewage discharge, and the corresponding cost of sewage treatment. Enlarge. Therefore, we should not only achieve good refining effect, but also reduce fiber damage, and also reduce the environmental impact of caustic soda effluent discharge, which is the focus and direction of many domestic and foreign enterprises.

With the continuous improvement of people's living standards, people's demand for textile products is increasing. Textile products The production and sale of both domestic and export products have been on the rise, and from the original 30 or 40 to 60, 80 and 100 yarn, the density has become very high. Therefore, the sizing process of weaving enterprises is becoming more and more complex, and the difficulty of printing and dyeing enterprises is becoming more and more difficult.

Low alkali cold pad batch pretreatment process. According to the situation of high concentration caustic soda in traditional cold pad batch pretreatment, although alkaline oxygen solution and room temperature storage are used at room temperature, alkali and hydrogen peroxide have relatively mild effect on cotton fibers and impurities (such as slurry, pectin, waxy and cottonseed shells). However, cotton fibers themselves have been damaged by removing impurities from cotton fibers. Moreover, with the change of weather temperature, the length of stacking time and the concentration of alkali oxygen, it is difficult to effectively control the damage degree of cotton fiber, especially the fine textile products, such as 60 or more than 80 products. In order to reduce this damage, after repeated studies and repeated experiments, we developed a low alkali cold reactor king LD, which is specially used for low alkali cold pad batch process, and applied and promoted the low alkali cold pad batch process (i.e. LS process: Low low, S Soda alkali) in some textile enterprises.

Low alkali cold reactor king LD series. This is a pre-processing product specially developed for reducing the amount of caustic soda in cold pad batch pretreatment. The appearance of the product is basically a colorless viscous liquid. The pH value of the 1% concentration is 7 to 8, which can be diluted with any cold water in any proportion. It is made up of many active substances. The product has very strong emulsification, permeability (including two penetration), dispersion, washing and other properties, not only has a good penetration effect on the fabric in the dip groove, but also has two osmosis effects on the fiber during the cold stacking post room temperature heap, making caustic soda and hydrogen peroxide more effective for other impurities and pigments in the fiber.

　　 Low alkali cold pad batch process It has changed the traditional high concentration caustic soda in the long time asked the stacking of fiber damage, also reduced the caustic soda pollution to the environment, greatly reduced the cost of caustic soda pretreatment, caustic soda reduced by 50 to 70%, which belongs to energy saving, environmental protection, and consumption reduction process.