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Digital ink-jet printing: technological innovation in the printing and dyeing industry

the printing and dyeing industry is an important part of China's textile industry chain and a key industry to drive spinning and weaving, improve the grade and added value of clothing and household textiles

promote structural adjustment and technological upgrading

after years of rapid development, the production and processing capacity of China's printing and dyeing industry has ranked first in the world, but there are still structural contradictions and problems such as weak independent innovation ability, large proportion of conventional products, lack of special products and brand products, low added value of products, and low profit space of enterprises. The traditional textile printing and dyeing industry is in a critical period of industrial transformation and technological upgrading

compared with traditional printing technology, the production process of digital ink-jet printing does not need the color separation, drawing, making process of traditional printing in the production process, and the process route is shortened, which greatly shortens the production time, reduces the consumption of manufacturing labor, manufacturing site and printing, and greatly reduces the proofing cost due to the simplification of the process. Digital ink-jet printing can accept patterns by means of CD-ROM, e-mail and so on. Generally, the proofing time does not exceed one working day, while the traditional proofing cycle is generally about one week. The shortening of proofing cycle and the reduction of cost have brought more market opportunities and profit space to enterprises

digital ink-jet printing technology breaks the limitation of chromatic registration and flower length of traditional printing. Because digital ink-jet printing technology can use digital patterns, through computer color measurement, color matching, spray printing, breaking through the chromatic restrictions of traditional textile printing patterns, especially in the printing of high-precision patterns such as color gradient and moire, digital ink-jet printing has more technical advantages. In addition, the pattern of traditional printing is often limited by the length of flower return, while the concept of flower return does not exist in digital ink-jet printing, which greatly expands the space of textile pattern design

because the production process of digital ink-jet printing is fully computerized, the production flexibility is greatly improved, and the production batch is not subject to any restrictions. Some products can even be delivered on the same day, which is desirable immediately. In addition, due to the application of computer technology, printing a series of patterns with the same pattern and different colors, as well as designers' modification of patterns and colors at any time in the production process, are the technical advantages of digital ink-jet printing

digital ink-jet printing has brought a technological revolution to the traditional textile printing and dyeing industry. The plastic substrate has been transferred to the second slightly larger mold cavity, which conforms to the development trend of the textile market from mass production mode to personalized and rapid response, and is of great significance to promote the structural adjustment and technological upgrading of the textile printing and dyeing industry

promote the realization of energy conservation and emission reduction goals

because printing and dyeing processing is a hot processing and wet processing process, the processing process needs to consume a lot of energy and water resources and produce printing and dyeing wastewater. The printing and dyeing industry is the focus of energy conservation and emission reduction in China's textile industry. In recent years, the printing and dyeing industry has done a lot of work in energy conservation and emission reduction, and achieved remarkable results. However, with the sustained and rapid development of the industry, the total consumption of water resources and the total emission of pollutants are still increasing. The printing and dyeing wastewater discharged from the printing and dyeing industry has become one of the key pollution sources in China's industrial system. At the same time, the high cost of water consumption and pollution control has seriously weakened the competitiveness of enterprises, and has become a bottleneck restricting the healthy and sustainable development of the textile printing and dyeing industry

the 12th Five Year Plan for the development of textile industry puts forward the development goals of reducing the energy consumption per unit of industrial added value by 20% compared with 2010, reducing the intensity of industrial carbon dioxide emissions by 20% compared with 2010, reducing the water consumption per unit of industrial added value by 30% compared with 2010, and reducing the emission of major pollutants by 10% compared with 2010. Textile printing and dyeing industry has a long way to go in energy conservation and emission reduction

the use of dyes in the printing process of digital ink-jet printing is distributed by the computer on demand, which can greatly reduce the consumption of dyes in the production process and the resulting printing and dyeing wastewater. Compared with traditional flat and round printing, digital ink-jet printing has the following advantages in energy conservation and emission reduction: (1) digital ink-jet printing produces less wastewater than flat and round printing. The process flow of digital ink-jet printing, flat printing and round printing is printing drying steaming washing. The washing link is to remove the paste on the printed cloth. Because the amount of paste used in digital ink-jet printing is very low, the water consumption of washing is much lower than that of flat and round printing. (2) The digital ink-jet printing technology directly controls the mechanical operation through a single computer, which is lower than the electricity and water consumption of the traditional printing and dyeing production line. (3) Digital ink-jet printing controls the form of printing nozzle operation by inputting digital form into the computer, realizing on-demand printing, so that the COD production per unit output is lower than that of flat and round printing. (4) The chromaticity value of washing wastewater from digital ink-jet printing is low, only dozens of times, while the plastic blowing industry, which mainly uses plastic film blowing machines for flat and round printing, accounts for a large proportion in the market, and the chromaticity of washing wastewater is as high as 500 ~ 600. In general, compared with the traditional printing process, the amount of dye used in digital ink-jet printing is saved by about 20% - 40%, and the water consumption is saved by 4. The experimental machine adopts a microcomputer to process and analyze data by about 0% - 60%

promote the printing and dyeing industry from big to strong

the United States, Japan and Western Europe are in the textile industry. Talk with him about the problems he encountered in the adaptability and performance of prosthetics. The printing and dyeing industry is at the top end of the value chain, exports products with high-tech content and high added value, controls market channels and the most cutting-edge technology, and occupies both ends of the industrial chain. The output and export of printed fabrics in China are large, but a considerable part of high-end printed fabrics still need to be imported. Among the export profits of printing and dyeing products, Chinese fabric manufacturers only get 10% of them. Under the business model of sample processing in the traditional textile printing and dyeing industry, the living space of printing and dyeing enterprises is getting smaller and smaller

digital ink-jet printing technology provides technical support for the production of high-quality and high value-added printing products. It will become an important means to promote the upgrading of printing industry, enhance the international competitiveness and added value of printing products, and improve the profitability of enterprises, and accelerate the process of China's traditional textile printing industry from big to strong