The most popular radiation curing ink market has g

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The radiation curing ink market has great development potential

in recent years, with the continuous improvement of technology and the increase of market demand, radiation curing ink has achieved rapid development in Europe. Especially in the field of packaging, uv/eb printing ink, a typical representative of radiation curing ink, has been widely used. It has improved the processing quality of printed products and the popularity of commodity brands. 1、 Curing principle of uv/eb ink

the drying of the ink film after printing of ordinary ink is that the binder (solvent, grease) in the ink is absorbed and volatilized by the substrate, and the solid substances (pigment, resin, wax, desiccant, etc.) remain on the substrate surface to form a thin ink layer. The difference between the drying of general inks and the fixation of energy curing inks lies in the different chemical composition of inks/varnishes, followed by whether the printing workshop needs to be equipped with energy curing equipment. It is also called energy curing ink because it contains some chemical substances. Under the action of UV light or high-energy electron beam, they produce free radicals or ionic radicals, which are then crosslinked with other substances to form polymer

the so-called uv/eb ink is an ink that can be cured in a high amount due to the aesthetic requirements of white appliances by UV curing or electron beam. Compared with the traditional drying ink, it has some unique characteristics: first, uv/eb ink has fast curing speed and high production efficiency. Generally, it can be completely dried and fixed on the substrate surface in only 1/10 second; Second, after UV ink printing, polish the printing, the gloss of the printing is quite high, and the surface is flat and uniform; Third, the printing products printed with radiation curing ink have strong resistance; Fourth, uv/eb ink does not contain volatile organic compounds (VOCs), which is more environmentally friendly; Fifth, the energy curing ink has less irritation to human skin than to ensure safety, is conducive to the health of staff, and the curing process can save energy

however, it will take some time for uv/eb ink to be widely used in printing. The biggest challenge comes from technology, including the development of related technologies by ink manufacturers, equipment manufacturers and suppliers of chemical materials such as surface additives. Specifically, the problems of UV ink are mainly manifested in odor, substrate adhesion, high-speed production and the cost that printing service providers consider most. In fact, these problems have been affecting the development of UV ink since it was applied in the printing field in the 1970s. Up to now, they still plague the whole industry

of course, once the problem is solved, UV ink will replace water-based ink in certain fields and become the most environmentally friendly and durable ink. With the EU's legislative restrictions on VOCs, the use of solvent based inks has been restricted to a certain extent. Water based inks have taken advantage of this good opportunity to hit a considerable market and gradually become the new favorite of the printing industry. However, printers are increasingly dissatisfied with water-based inks because their quality has not yet reached their expectations. At the same time, suppliers in various fields such as ink, equipment and raw and auxiliary materials have been working together to solve the problems related to the uv/eb system. Fortunately, some technologies have also been improved and developed to make radiation curing more effective and lower cost

II. Current situation of radiation curing inks

the data shows that at present, the proportion of radiation curing inks in the whole printing ink is less than 10%, which is mainly because it has more difficulties than advantages in the promotion and application of offset printing and narrow width rotary flexo printing. According to the data analysis provided by Pira, a British packaging consulting company, in the packaging and printing field in Europe, uv/eb ink accounts for about 65% of the sales of offset printing ink, equivalent to about half of the sales of uv/eb ink in the whole packaging field

for UV flexo printing inks, 80%~90% are used for packaging printing, most of which are used for label printing. In gravure printing, digital printing, printing and other printing processes, the application of uv/eb ink is not satisfactory, and its market share is relatively low. However, with the continuous breakthrough of new technologies, especially the improvement of ink adhesion, uv/eb ink has also begun to develop steadily in the field where the original amount of ink was not considerable

information source: China polymer

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