Environmentally friendly denim jeans wash processing technology
Environmentally friendly denim jeans wash processing technology, How much do you know?
In recent years, the pollution problem of denim processing has been wide a concern by public opinion, and the china jeans factory is facing a severe test. The dyeing and finishing of denim garments consume a lot of water and wastewater, and the concentration of pollutants in the wastewater is very high. Under today’s environmental protection trend, production methods at the expense of the environment will be gradually eliminated, and major China denim manufacturers have begun to introduce new technologies, new equipment, and new additives in order to achieve green transformation and development.
Environmental Protection Technology of Denim Finishing Process
(1) Mercerized alkali recovery technology
In order to increase the lasting luster of cotton fiber and improve the dimensional stability of the fabric, it is necessary to mercerize the cotton fiber with caustic soda. After mercerizing, the residual alkali on the cotton fiber is washed down. The concentration of these waste alkalis is about 40-50g/L. If it is not recycled, it will not only cause waste but also greatly increase the difficulty of sewage treatment. Due to both economic and environmental benefits, mercerized alkali recovery equipment is gradually welcomed by printing and dyeing enterprises.
(2) Resource utilization of printing and dyeing wastewater
Printing and dyeing wastewater has the characteristics of large chroma, large COD change, large alkalinity, poor biodegradability, and large water temperature change, and has become one of the most important sources of water pollution in China. At present, the resource utilization of printing and dyeing wastewater is less than 10%, which is far lower than that of other industries. Treat denim processing wastewater so that the main indicators such as CODcr, suspended solid concentration, pH value, and chromaticity meet the production water or reclaimed water reuse standards of various technological processes, and use it for dyeing, rinsing, greening, cleaning, etc., thereby improving resources. Utilization rate, and reduction of sewage discharge, help to improve the Environmentally of denim jeans production methods.
(3) Foam Technology
Foam technology is to use a small amount of liquid to mix air into the liquid through certain equipment and foaming agent to form the metastable foam required by the foam dyeing and finishing technology, and apply the foam to the fabric in a uniform state to achieve the desired effect. A new dyeing and finishing technology. Foam dyeing and finishing technology is a typical energy-saving technology with a low liquid supply, which can evenly distribute chemical agents under the condition of minimum moisture supply, which is completely in line with the development direction of Environment dyeing and finishing.
Environment-friendly Garment Washing Technology
(1) Low bath ratio water washing technology
The washing process is an important production step in the denim jeans industry, but there are problems such as high energy consumption, high water consumption, and high pollution. Italy has developed water washing equipment with the advantages of high efficiency, energy saving, and water saving. The equipment has a small bath ratio (1:5 ~ 1:7) and a good processing capacity, and the JET SYSTEM system with a patented design can reach 1:2. ~ 1:3 liquor ratio.
(2) Ozone-washing technology
Ozone technology has many application advantages in denim garment processing, including reducing water and chemical consumption, shortening process time and processes, and being clean and environmentally friendly. The ozone washing machine can apply the ozone generated by the ozone generator to the washing process of the garment, and produce the decolorization and bleaching effect through the ozone. This type of equipment is mainly used for the distressing treatment of denim jeans products. By adjusting the amount of ozone generated, different levels of treatment effects can be achieved. The ozone washing machine does not need to use chemicals and can save a lot of water resources, so it meets the requirements of ecological environmental protection.
(3) Enzymatic washing process
The full enzymatic washing process creates a new denim style by using enzyme preparations instead of chemicals in the denim processing process, ensuring that denim garment processing has the least impact on the environment.
(4) Laser engraving
The denim laser engraving process directly replaces the hand rubbing and spraying processes in the denim washing process and can produce image patterns, gradient patterns, cat whiskers, frosting, and other effects on the denim fabric, which greatly reduces the added value of the product while increasing the added value of the product. It reduces the waste of water resources and the discharge of washing wastewater, which not only ensures the cleanliness and safety of the processing environment but also caters to the trend of energy saving and emission reduction. The laser engraving equipment adopts the principle of automatic operation and control system and laser non-contact thermal processing, and the personalized washing effect of denim clothing such as stone grinding, sandblasting 3D cat whiskers and tatters produced by software replace the traditional manual hand wiping process. Compared with traditional cumbersome manual processing procedures, laser engraving only needs to import processing graphics once, and multiple processing procedures can be completed at one time, which is more efficient and saves a lot of labor costs. We have a post dedicated to discussing the application of Laser engraving in denim clothing, more information here: The advantages of laser applied to denim jeans production
With increasingly stringent environmental protection requirements and pressure from non-governmental organizations, the labor-intensive denim industry has encountered great challenges. In order to realize the sustainable development of enterprises, major denim processing enterprises have gradually embarked on the road of transformation and upgrading, and environmental protection processing technology has become an inevitable choice for enterprises.
This is Amy Mok from JFY jeans company, we are a denim jean manufacturer in China, and I have been in the apparel production industry for 20 years in China. If you have any questions about apparel production, including woven, knitted, denim jeans, welcome to discuss with me. I will tell you everything that I know.
