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1. Problems at the level of consciousness
The government and the people of our country pay less attention to environmental protection issues than the equipment supplies. In developed countries, as long as there is a hidden danger in environmental protection, a certain technology is strictly prohibited, "one vote veto," not to discuss Central China. However, our country must consider economic issues and many other comprehensive issues in central China. If the environmental awareness of the Chinese people does not improve to the height of "one vote veto," "UV glazing instead of laminating technology" is a sentenceless printing technique.
2. Problems at the technical level
At present, UV glazing technology is not very mature, and some technical problems need to be solved. This is a direct reason for limiting the promotion of UV glazing technology.
(1) Folding, abrasion resistance and cost The primary purpose of coating and glazing is to beautify and protect the middle part of the front cover of books and periodicals. However, the resistance to folding and abrasion of domestic UV varnish is not very satisfactory. It can be seen that the book often suffers from breaks in the spine at the corners and at the pressure lines after repeated readings; the cover is easily worn during the book delivery process and leads to scrap printing tools. .
Some foreign professional refractive oils can solve the above problems, but the cost is relatively high, even higher than the film printing technology.
The magazine has a strong timeliness and a short sales cycle, and readers rarely save after reading. Therefore, the wear resistance of varnish is relatively low. The coating process can basically meet the requirements. Some magazines have begun to use glazing technology in China. Central.
(2) Pressure resistance If handled improperly, the lacquer layer at the spine side pressure line can easily break the printing market.
(3) Appearance properties After coating, the thickness of the cover did not increase much. It appeared to be relatively soft. If paper with the same thickness was used, the appearance of the coating was not as good as that of the middle part of China.
3. UV coating advantages and development prospects
Although there are still some difficulties in the promotion of UV glazing technology in China's publishing industry, the laminating process will not retreat from its dominant position in a short period of time. However, it should be recognized that the promotion of UV glazing technology is a general trend and various constraints will be gradually overcome. Printing Technology.
First of all, with the approaching of the 2008 Olympic Games, the country will pay more attention to the issue of environmental protection, and the people’s environmental awareness will also increase rapidly. The pace of replacing glazing will accelerate the printing technology. From a technical point of view, a polishing machine that is both environmentally friendly and of superior quality has been launched. Under the attraction of huge business opportunities, domestic varnish manufacturers have also accelerated the process of solving the problem of folding, abrasion resistance and cost, and then they have applied the glazing process. The deficiencies on the slight improvement, UV glazing instead of film is no longer a matter of distant printing Alliance.
In addition, UV coating also has many advantages that the coating does not have: 1 The coating oil used has a solid content of 100%, no solvent evaporation, and it is safe and environmentally friendly. 2 Drying speed is fast, and it is not limited by the kinds of substrates. After the UV coating, the surface of the printed product is smooth and bright, and the hardness is high in central China. 3 The high production efficiency can greatly reduce the production cost. The comprehensive cost of 250gm2 coated paper and 200gm2 coated paper is almost equivalent to the material price. In this way, in the case of the same cost, use thick paper as the cover, you can completely make up for the lack of glazing on the appearance of the characteristics of the printing alliance. 4 Some domestic representative enterprises are continuously researching new technologies to promote the improvement of the overall level of UV glazing technology in China. This will become the most powerful guarantee for the promotion of UV glazing technology.
Third, domestic coating equipment has been fully able to meet the very demanding UV coating requirements of the printing market. The YT1A1 Folio paper machine developed and produced by Ching Henry Co., Ltd. has a speed of up to 8000 hours and can be matched with high-speed offset presses in central China. It can perform partial full-size UV ​​coating, partial full-size water-based coating, and sheet-fed flexo printing tools. In addition, the machine has also significantly improved the printing market in terms of processing effects and support for subsequent processes. It adopts the principle of flexo printing for UV glazing. The number of ceramic anilox roller screens is more than 600 thread inches. It can precisely control the amount of gloss oil for fine glazing, and can overcome the coating of traditional oil coating on the roller coating machine. Too thick, printed products are easy to crack, can not be hot stamping and other aluminum foil printing market.
We believe that more companies will also join the R & D team of glazing technology, greatly promoting the development of this technology and promoting printing technology. As the environmental awareness of the Chinese people is enhanced, UV glazing and water-based glazing will have a lot to do in the publishing industry. UV glazing instead of lamination will eventually become a reality material market.
Technical Problems to Be Solved by Substituting "UV Varnish" for "Covered Film"
In order to improve the wear resistance and aesthetics of the cover of the books, the film has been widely used in the publishing industry. However, with the increasing awareness of environmental protection in the world, more and more countries have begun to prohibit the use of the middle process of the coating process. In China, it was once publicized that UV coating was used instead of film lamination. However, due to various reasons, UV glazing has not been popularized and the film coating process still dominates the material market. Recently, the author discussed this issue with the People's Posts and Telecommunications Press Mr. Zhao Pengfei and some other industry insiders. He believed that UV glazing instead of the laminating process currently has some problems in the conscious level and the technical level.