The most popular focus to promote the development

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The focus of promoting the development of digital ink-jet printing industry (I) the equipment and technology of digital ink-jet printing will be further improved. Compared with traditional printing, digital ink-jet printing has many advantages, and the equipment has also developed to the fourth generation. However, the progress of its industrialization promotion is slow. In addition to the limitation of printing speed, the main reason is that the research on matching processes and technologies lags behind, which is specifically reflected in the following aspects

(1) ink problem. At this stage, compared with traditional powdery dyes, digital ink-jet printing inks still have some problems, such as high price, poor interoperability of inks from various ink manufacturers, poor storage stability of inks, etc. At present, the cost of digital ink-jet printing is high, and the quality of digital ink-jet printing products is affected to a certain extent

(2) color matching. Color matching is an important part of digital ink-jet printing. Digital ink-jet printing outputs color through computer control, but the color reflected on the computer display screen is different from the color mode of spray printing (the display screen color is RGB mode, while the spray printing color is CMYK mode), which requires a color matching process. In the process of color matching, different process parameters must be set according to dye characteristics, printing accuracy, fabric category, etc. if the parameters are not set well, the color of printing will be greatly different. In addition, because digital ink-jet printing adopts the principle of four color separation, any small change in parameters will cause great changes in color. In particular, the color systems of grey, coffee and sauce red, which need to be mixed with four colors, any change in parameters will have an impact on the color effect of printing. Color matching cannot be called out directly on the computer, and it needs to be realized by gradually adjusting the set parameters. Therefore, the research of color matching technology is very important. Cannot start

(3) sizing problem after feeding. Digital ink-jet printing must be starched before ink-jet printing to prevent ink infiltration. Sizing has a great impact on the quality of jet printing. If there are problems such as weft skew, wrinkle printing, uneven and uneven during sizing, there will be seepage, cloth escape and uneven color during jet printing, resulting in a high defective rate of ink-jet printing. Therefore, what additives and equipment are used for sizing are two difficult problems. At present, most enterprises apply reactive dye ink printing, and use sodium alginate as the main sizing agent. As sodium alginate is particularly easy to absorb moisture in the air, the difference in the weather and dry humidity of the fabric during printing will lead to inconsistency in the moisture content of the fabric after sizing, resulting in great changes in the color light of digital ink-jet printing. If the humidity in the air is very high, the pattern after spray printing will seep, making the printing outline unclear. The special equipment for sizing of digital ink-jet printing needs to be further developed

(4) color bleeding. Digital ink-jet printing adopts the principle of four color separation of paper printing, and displays various colors of natural light through the cross reflection of four colors in three-dimensional space. However, in actual production, some fabrics after digital ink-jet printing are often not bright enough, especially where the more colors are mixed, the higher the gray level, and the fabric surface appears to be covered with a layer of mist. The main reason is that the ejected inks seep into each other

(5) positive and negative color problems. Digital ink-jet printing is to supply ink on demand. Due to the small amount of ink sprayed on the fabric, the ink can only stay on the surface of the fabric, resulting in large color difference between the front and back, which brings two problems. First, the products to be used for penetration printing cannot meet the requirements; Second, loose fabrics, when rubbed or sewed, cause the problem that the silk without color on the reverse side turns over to the front side, commonly known as reverse silk, which affects the appearance of the fabric and even cannot be accepted by consumers. If the ink supply is increased and the reverse osmosis is improved, Klaus mafi and Fraunhofer polymer synthesis and processing experimental factory Center (Paz) in schkopau, Germany, work together to improve the reverse silk situation, but it will affect the clarity of the printed pattern

(6) equipment universality and ink openness. Digital ink-jet printing equipment has developed relatively rapidly in recent years, and now it has developed to the fourth generation. However, many devices do not open their ink indicators to the public and do not accept compatible inks. In addition, the digital ink-jet printing equipment of different models from the same manufacturer cannot be used universally, and the proofing equipment and production equipment must be of the same generation. These problems are the factors that limit the popularization and application of digital ink-jet printing

in general, digital ink-jet printing still has problems in process, technology and consumables. By constantly overcoming these shortcomings and limitations, digital ink-jet printing will move towards industrialization and scale, and develop synchronously and rapidly with digital ink-jet printing equipment

(II) digital ink-jet printing will coexist with traditional printing process for a long time and complement each other's advantages. The emergence and continuous improvement of digital ink-jet printing technology has brought a new concept to the textile printing and dyeing industry. Its advanced production principles and means have brought unprecedented development opportunities to the textile printing and dyeing industry. The popularization and application of digital ink-jet printing technology is conducive to promoting the change of enterprise production mode and business model, meeting people's personalized needs, improving people's quality of life, and meeting environmental protection requirements. It will have a significant impact on the development of China's textile printing and dyeing industry. With the continuous maturity of digital ink-jet printing technology, the improvement of product quality, and the improvement of localization supporting capacity, digital ink-jet printing will make progress in improving printing speed and reducing the price of ink and other consumables, and the production cost will be greatly reduced. Digital ink-jet printing technology will truly realize industrialized production, and the popularity will be higher and higher

traditional printing cannot produce high-quality products and personalized products required by digital ink-jet printing due to technical limitations such as version and color performance. Digital ink-jet printing market is a new personalized market. Its products and market prices are determined by the concept of personalization. Digital ink-jet printing products and technologies are the development and extension of traditional printing. The two markets coexist and complement each other, and are independent of each other, forming different market prices and consumer groups

digital ink-jet printing makes up for the technical defects and gaps of traditional printing, and adapts to the international trend that the prohibition of personalization seems to have nothing to do with the "national sword" action. Compared with the current printing market, the digital ink-jet printing market still has a lot of room for growth. In the next few years, the proportion of digital ink-jet printing in the printing market will continue to increase, and the domestic digital ink-jet printing industry will have a great development. In the next few years or even longer, digital ink-jet printing will not replace the traditional printing process on a large scale, and will coexist with the traditional printing process for a long time with complementary advantages. It is estimated that during the 12th Five Year Plan period, China's digital ink-jet printing products will account for about 4% of the printed cloth output

(III) forecast of market prospect of digital ink-jet printing

from the statistical data of digital ink-jet printing volume of Enterprises above Designated Size in China from 2008 to 2011, the compound growth rate of digital ink-jet printing output of the whole textile industry is more than 40%. With the rapid development of multi variety and small batch orders as the market consumption trend, the continuous innovation of digital ink-jet printing technology and the rapid decline of costs, China's digital ink-jet printing industry is expected to maintain a compound growth rate of more than 40%. By 2011, the market ownership of China's textile digital ink-jet printing machines is about 700, and the ownership and production capacity of digital ink-jet printing machines are significantly lower than those of developed countries. It is estimated that by 2015, the output of digital ink-jet printing of textiles will exceed 500million meters. According to the market demand, the number of digital inkjet printing machines in China will exceed 2500

(IV) key points to promote the development of digital ink-jet printing industry

due to the technical and market conditions, digital ink-jet printing has entered a favorable period of upward development, but a large number of promotion has a process. The next steps to promote the industrialization and application of digital ink-jet printing include the following aspects:

first, the specialization of printing equipment and supporting equipment. Different products, markets and industries have different requirements for the accuracy of digital ink-jet printing equipment, that is, the accuracy of digital ink-jet printing equipment needs to be specialized, and the supporting equipment such as sizing, steaming and washing also needs to be specialized. Therefore, for different products such as silk, cotton, chemical fiber, wool, etc., the optimized digital ink-jet printing and supporting equipment that can be combined with software to set relevant technical parameters should be designed and considered to be conducive to future transformation and improvement

the second is the standardization of technological parameters. Corresponding software is designed for silk, cotton, chemical fiber, wool and other products to standardize process and technical parameters

third, develop cost-effective inks. Ink has great potential in quality, price, compatibility and so on, which needs further research and development or screening of cost-effective inks

fourth, explore different markets. At present, the digital ink-jet printing machine has been successfully applied to the mass production of silk fabrics, as well as the proofing and small batch production of cotton, flax, cashmere and other fabrics. In the next step, we should actively develop the mass production of woven printed and dyed fabrics, knitted printed and dyed fabrics, home textile printed and dyed fabrics and other products. Establish a typical enterprise in each industry, and drive the development of the whole industry through typical enterprises

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