Application and development of the hottest radiati

2022-08-01
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Application and development of radiation curing technology

I. overview

radiation curing usually refers to the rapid polymerization reaction of solvent-free liquid chemicals irradiated by ultraviolet (UV) or electron velocity (EB) to cure ink and adhesive. The traditional thermosetting method is called drying or hardening

hydrocarbon organic compounds are usually used as solvents to dissolve angular polymers, so that coatings or inks have appropriate viscosity. When the paint is dry, the organic solvent volatilizes. This organic compound can form a more serious greenhouse effect than carbon dioxide, and form oxides and photochemical smog under the sunlight. Therefore, reducing the volatilization of organic solvents in the processing process is very important for controlling environmental pollution

the use of radiation curing technology can greatly reduce VOC, or even completely eliminate solvents (see Table 1). Radiation curing technology is characterized by fast curing speed and low operation cost. It is a new generation of high-efficiency, energy-saving and pollution-free green curing technology

Table 1 organic solvent content in various coatings

aqueous coatings solid powder coatings EB and UV curing coatings high curing coatings

organic solvent content (%) 10-200-530-70

II. Application of radiation curing technology

in recent years, radiation curing technology has been applied not only in wood coatings, metal decoration, printing, but also in optical lenses, electronic devices Optical coating and other precision industries have been applied. The main application fields of radiation technology in the United States are coatings and printing inks. The main growth areas of radiation maximization are UV flexo printing, adhesives, UV curable powder coatings and photoresists

III. radiation curing China's analytical instruments are increasing year by year. Technology outlook

in the future, there will be new development in the development and research of functional monomers, prepolymers and irradiation equipment. On the one hand, new UV curing systems (such as water-based UV curing systems) will be developed; On the other hand, powder coatings will be paid more and more attention

in the next few years, the main problems to be solved in radiation curing are to reduce the prices of raw materials and curing equipment, and develop gravure printing inks, weather resistant coatings and inks suitable for high-speed wide width gravure printing. At present, the main factors affecting the application and development of radiation curing technology are the safe operation of equipment, the difficulty in UV curing of non-ferrous coatings, the large initial investment in EB (electronic speed) curing equipment, the poor performance of some products compared with conventional thermosetting products, the difficulty in curing thick films (greater than 75m), the difficulty in approving products in direct contact with food, and the difficulty in disposing of chemical wastes

at present, for chemists in the field of radiation curing, the urgent task is to develop oligomers with low viscosity and high band curing, multi-functional monomers with low toxicity and high activity, and more effective photoinitiators with specific wavelengths; For radiation curing equipment manufacturers, they should try to prolong the service life of UV lamp, improve the output power, reduce the heat generated, and reduce the cost of EB equipment. In developed countries, the annual growth rate of radiation curing technology will reach more than 10% in the next 10 years. In recent years, with the sustained economic development of developing countries, UV/EB curing technology will be applied in more and more enterprises

China is in a period of rapid economic development. With the rapid development of industry, people pay more and more attention to the problem of "administrative assistant" pollution of environmental pollution from the cause in order to evenly spread the estimation. It is recognized that the development of science and technology should not only promote the sustainable development of economy and society, but also ensure the sustainable development of the environment on which human beings depend. Therefore, it is imperative to reduce the content of volatile solvents in inks and adhesives. Radiation curing technology can not only reduce environmental pollution, save energy, but also improve product quality. Therefore, radiation curing technology will be more and more widely used in our country

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