Application of the hottest UV technology in screen

2022-09-23
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The application of UV technology in the silk printing industry

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 and so on, especially in the fields of decoration, beautifying people's lives, commercial advertising, publicity and printed circuits in the electronic industry, It 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, which is not too much

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, because the radiation curing products conform to the "3E" principle with their own characteristics, that is, "energy saving, environmental protection and high efficiency", they will be widely used in many fields of the national economy and drive the common development of related industries

there is a close relationship between the silk printing industry and the radiation curing industry, among which the successful application of UV ink in the silk printing industry is the most prominent example

with the continuous development of silk printing technology, silk printing equipment has also developed from manual and monochrome to fully automatic and multicolor with a high degree of automation. Printing: the quality and grade of the hydraulic system control module brush have been significantly improved, which puts forward higher requirements for silk screen printing ink. 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 characteristics of instant 6 contact lenses (CL), inter material curing (dry, without volatile solvents), simple and convenient application, etc. 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

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 needed 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, and the concentration is stable, suitable for high-quality printing. Solvent is an important part of silk printing ink. The performance of ink varies with different regions, temperature and humidity. Some people say that 90% of the problems in the silk printing process are related to solvents. UV ink does not contain volatile substances, the viscosity of the ink changes little, and it 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 in terms of output and varieties of silk printing inks. 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 inks 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, weather resistance and other properties. The chemical substances in UV ink form high molecular stereoscopic polymers through cross-linking reaction. The ink surface has strong chemical resistance and friction resistance, which can reduce the losses caused by the harsh environment during the transportation of printing materials and prolong the time of outdoor display of some printing materials

due to the unique characteristics of silk printing compared with other printing methods, UV ink adopts silk printing, which can produce special printing effects. Specific performance:

1. At present, many high-end cigarette, wine, cosmetics, food packaging boxes popular in the packaging market are printed on gold and silver card paper with UV frosting, UV icing, UV wrinkles, UV refraction, UV gemstones, etc. after exposure to UV lamps, a variety of simulation artistic effects such as frosting, icing, wrinkles, gemstones, etc. will be produced. Just like the smooth metal surface has been treated by corrosion, sanding, carving and other processes, it makes the printed matter look elegant, luxurious and solemn. Especially when combined with offset printing, flexo printing, gravure printing and other printing methods, the advantages complement each other, which can better improve the market competitiveness of packaging products

2. UV local glazing of printed matter. Polish with a 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 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 kind of equipment, and the benefits are very considerable. The investigation of the silk printing industry in Europe and the United States organized by the China silk printing industry association found that UV ink has been widely used. Now, more and more well-known foreign enterprises producing full-automatic drum silk printing machines come to China to seek partners, which will further promote the application of UV ink in the silk printing industry

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 inks are used for white background, overprint 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, and it is printed and dried at any time. The efficiency is very high, and the printing effect is very exquisite

in the past, almost all UV inks used in China were imported, and the inks directly imported from abroad were very expensive, and general printing enterprises did not dare to pay attention

with the increasing awareness of environmental protection, UV curing technology 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, such as Guangdong Zhongshan Zhongyi ink and coating Co., Ltd., Shenzhen Meihua ink and coating Co., Ltd., Jiangsu Kunshan futu chemical research company, etc. have developed high-quality UV ink and coating. After years of research and development and continuous expansion of new products, UV products have been involved in offset printing, silk screen printing, gravure printing, spraying and other printing fields and construction fields

in terms of UV screen printing, in addition to commonly used frosting, wrinkles, refraction, foaming, varnish and other products, crystal, matte varnish, matte paste and other products are introduced to the market to meet the different requirements of the printing industry, which is suitable for the packaging and printing of wine bags, cigarette bags, calendars, stationery and so on. Among them, crystal is widely used because of its high gloss, good flexibility and strong hand feeling. Dumb film varnish has certain advantages in gloss, defoaming and leveling performance, fast printing performance and anti tackiness energy. In addition, in addition to common varieties, UV screen printing plastic color inks have recently introduced new varieties that have greatly improved their adhesion, flexibility and water resistance, and have achieved better results in plastic containers and advertising printing for customers in Guangdong and Hong Kong. At present, domestic UV ink has strong competitiveness. When the sensor is under external force or pressure, its performance directly catches up with well-known products such as French Dolby, German cailibao, and Debao, and has an absolute advantage in price

generally speaking, China's UV industry is only starting from the aspects of technology, production, application and so on. The development of any emerging industry cannot be separated from the support and cooperation of other industries. However, whether it is the coating and ink industry, or the printing industry, machinery industry, raw material industry, they all hope to find the common ground of "UV" in the process of horizontal integration, in order to seek to develop some new application fields, Achieve new breakthroughs in their respective industries

source: printing industry

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