Application characteristics of the hottest UV tech

2022-07-25
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Application characteristics of UV technology in silk printing

with the continuous development of silk printing technology, silk printing equipment has also developed from manual and monochrome to fully automatic and multi-color. The quality and grade of printing have been significantly improved, which puts forward higher requirements for silk printing oil, but pay attention not to exceed the rated torque ink of reducer. UV ink is a kind of environmental friendly ink that has developed rapidly in recent years. It is loved by people in the printing industry because of its instant curing (dry, non-volatile solvent), simple and convenient application. Especially in silk printing, UV ink is widely used. Suitable substrate materials include paper, synthetic paper, wood products, plastics (ABS, PS, PC, PVC, PMMA, pet, etc.), coated metal, glass, ceramics, etc

silk printing has a thick ink layer, bright color, simple process, less investment and quick effect. Therefore, it has been widely used in many industries, such as light industry, electronics, machinery, automobile, textile, chemical industry, commerce, art, advertising, decoration, packaging, etc., especially in the fields of decoration, beautifying people's life, commercial advertising and electronic industry printed circuit, which plays an irreplaceable role in other printing methods. In the modern printing industry, without silk printing, it can not be called a complete printing enterprise. This evaluation is not excessive. Radiation curing industry is a new industry, which mainly focuses on the application of inks, coatings, adhesives and supporting resins, monomers, initiators, additives, etc. Compared with the traditional related industries, although the foundation is relatively weak, the radiation curing products, with their own characteristics, comply with the 3E principle, that is, energy saving, environmental protection and high efficiency. Therefore, they will be widely used in various fields of the national economy and drive the common development of related industries. There is a close relationship between the silk screen printing industry and the radiation curing industry, and the successful application of UV ink in the silk screen printing industry is the most prominent example. The application of UV ink in silk printing mainly has the following characteristics: (1) fast curing speed, small volume of UV equipment and high production efficiency. It is especially suitable for multi-color and automatic flow operation. In the past, solvent based ink drying required a long drying line, and even some monochrome printing materials needed a drying device of about 10m. If UV ink is used for printing, only one UV light source is required to solve the problem. It saves the cost of purchasing equipment and space, and greatly improves the production efficiency. (2) The ink will not block the plate, the concentration is stable, suitable for high-quality printing. Solvent is an important component of silk printing ink. The performance of ink varies with the temperature and humidity in different regions. Some people say that 90% of the problems in silk printing are related to solvents. UV ink does not contain volatile substances. The viscosity of the ink changes little and is easy to operate. These problems are well solved and the printing quality is greatly improved. In addition, due to the fast curing speed of the ink, the residence time of the printed matter in the drying process is shortened, and the possibility of dust pollution is reduced. (3) It does not contain volatile solvents and has no negative impact on human body and environment. At present, volatile dry solvent inks are the mainstream of silk printing inks in terms of output and varieties. Due to its slow drying time, 60% of the solvent will volatilize during the drying process, which will pollute the environment. It has become the common goal of people in the printing industry to seek printing ink with less pollution, faster drying and less energy consumption. (4) The ink layer is thick, the substrate is wide, and the operation is simple and flexible. The solid content of general solvent inks is about 40%, while the solid content of UV inks after curing is close to 100%, which is 2 ~ 5 times that of general inks. If you use thick film printing UV ink, the effect is better. (5) Good wear resistance, solvent resistance and weather resistance. The chemical substances in UV ink form high molecular stereoscopic polymer through cross-linking reaction. The ink surface has strong chemical resistance and friction resistance, which can reduce the loss caused by the harsh environment during the transportation of printing materials, and prolong the outdoor display time of some printing materials. Due to the unique characteristics of silk printing compared with other printing methods, UV ink using silk printing can produce special printing effects. Specific performance is as follows: 1. at present, many high-end cigarette, wine, cosmetics and food packaging boxes popular in the packaging market are printed with UV frosting, UV ice flower, UV wrinkle, UV refraction, UV gem, etc. on gold and silver card paper. After the exposure of UV lamp, a variety of simulation artistic effects such as frosting, ice flower, wrinkle, gem, etc. will be produced. Just as the smooth metal surface has been treated by corrosion, sanding, carving and other processes, it makes the printed matter look elegant, luxurious and solemn. In particular, it can be combined with offset printing, flexo printing, gravure printing and other printing methods to complement each other and improve the market competitiveness of packaging products. 2. UV local glazing of printed matter. It is polished by silk printing machine, with thick light film and high brightness. In recent years, the production scale of screen printing brush machine has been expanding, and the technical content has been improved year by year. The printing accuracy and printing speed of the full-automatic drum silk printing machine have been greatly improved, with an average printing speed of 2500 times/hour. Most enterprises that carry out local glazing and gold and silver paperboard printing use this equipment, and the benefits are very considerable. The investigation of silk printing industry in European and American countries organized by China silk printing industry association found that UV ink has been widely used. Now, more and more well-known foreign enterprises producing full-automatic cylinder silk printing machines are seeking partners in China, which will further promote the application of UV ink in the twin-screw and multi-screw silk printing industry, which has been derived from the original single screw. 3. UV ink has been widely used in CD printing, whether silk printing or the combination of silk printing and offset printing. Take a CD-ROM silk printing production line produced in Japan as an example: UV ink is used for white background printing, overprinting four colors, and cover printing varnish. The printing accuracy reaches 0.05mm, and the printing speed is 2400 pieces/hour. It is dried with UV lamp. The printing efficiency is very high, and the printing effect is very exquisite. In the past, almost all the UV inks used in China were imported, and the inks imported directly from abroad were very expensive, so general printing enterprises did not dare to pay attention to them. With the increasing awareness of environmental protection, UV curing technology expressed in Zhongli Chao: "At present, the hottest topic is that 5g has been widely developed and applied in many fields. Therefore, some domestic ink and coating manufacturers have seized this opportunity to launch UV curing products to meet the market demand. For example, Guangdong Zhongshan Zhongyi ink and coating Co., Ltd., Shenzhen Meihua ink and coating Co., Ltd., Jiangsu Kunshan futu Chemical Research Co., Ltd. have developed high-quality UV ink and coating. After years of research and development of new products and Continuous expansion, UV products have been involved in offset printing, silk mold surface through mirror grinding printing, gravure printing, spraying and other printing fields and construction fields. In terms of UV screen printing, in addition to commonly used frosting, wrinkle, refraction, foaming, varnish and other products, there are also crystal, matte film varnish, matte paste and other products introduced to the market to meet the different requirements of the printing industry. It is suitable for the packaging and printing of wine bags, cigarette bags, calendars, stationery, etc. In general, China's UV industry is just starting from the aspects of technology, production, application and so on. The development of any emerging industry is inseparable from the support and cooperation of other industries. Both the coating and ink industry, the printing industry, the machinery industry and the raw material industry hope to find the common ground of UV in the process of horizontal integration, so as to seek to develop some new application fields, Achieve new breakthroughs in their respective industries

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