Newspapers, magazines, posters and promotional materials spread information, and a large amount of waste water and waste are produced in the production process. The Nano-Green Printing Manufacturing Technology of the Chinese Academy of Sciences' Class A Strategic Science and Technology Pilot Project, which is under the auspices of the Institute of Chemistry of the Chinese Academy of Sciences, is expected to change this. At present, the technology has entered a practical stage, and many media organizations and printing companies, including the Beijing Daily Printing Factory, have applied green printing technology, and the pollution is approaching zero.
At the Green Printing Industrial Park of the Chinese Academy of Sciences in Huairou, the reporter saw a colorful photo, it is hard to believe that the photo was printed, which is the magic of nanotechnology printing - higher resolution. “Different nanostructures have different properties, such as hydrophilicity and lipophilicity. We have found a rule for the control of nanostructures and surface properties.†Researcher Song Yanlin, director of the Green Printing Key Laboratory of the Institute of Chemistry, Chinese Academy of Sciences, said that the base material is made into a super-parent. The water-based structure, and then printed on the super-lipophilic nano-transfer material, the printing plate printing clarity will be greatly improved.
Researchers print out the smallest ink dots that contain only one nanoparticle, and then connect the ink dots into the thinnest lines to form a flat surface. The problem of forming high-precision patterns by printing by nanoparticles is overcome.
In addition to printing books, newspapers, magazines, nano-printing can also print more sensitive subway tickets.
The reporter saw in the laboratory that the printing press was printing a circle of circuits on the paper card according to the procedure. Song Yanlin said: "This is a non-contact subway ticket. The circuit being printed is an antenna." The new technology printed ticket has more environmental benefits, in addition to its high sensitivity. “Existing tickets are difficult to recycle, and tickets made with nano-green printing technology can be re-slurry, pulp and metal separated by gravity, and most of the material can be recycled.â€
Such magical materials are not expensive. According to Song Yanlin, with the continuous improvement of supporting industries and the soundness of the service system, after several aspects have been streamlined, the cost of nano-green printing will be reduced by about one-half compared with the existing printing plate-making technology.
According to official statistics, the total output value of China's printing industry reached 1,039.85 billion yuan in 2013, but it also produced a large amount of photosensitive waste liquid, harmful solvents and plate-based electrolytic waste liquid.
The new nano green printing technology starts from the main links of plate making, ink and plate printing, and adopts nano green printing technology and environmentally friendly materials to completely eliminate the pollution of the printing process and greatly simplify the printing process.
Song Yanlin said that the green printing manufacturing technology uses printing to form patterns on different substrate surfaces, which can be used not only in the traditional printing industry, but also in the printing circuit, printing and dyeing, and the patterning of glass and ceramics to solve serious pollution and high energy. Consumption problem.
According to estimates, after the nano-green printing manufacturing technology is fully promoted, the country can reduce 10,000 tons of organic solvents, millions of tons of waste liquid and wastewater every year, saving hundreds of tons of silver and tens of thousands of tons of copper and other metals. Because the new technology has independent intellectual property rights, it has got rid of the passive situation that has long been controlled and restricted by the core technology and patents of international monopoly enterprises. Song Yanlin said that in another five years, it is expected to form a green printing manufacturing industry chain, which will extend the traditional printing industry to the fields of electronics, printing and dyeing, and building materials manufacturing.
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