——Interview with Chairman of the Asian Radiation Curing Technology Association Hong Xiaoyu When talking about eco-friendly coatings, people may think of high solids coatings, powder coatings, and water-based coatings. They focus on using little or no volatile organic solvents. However, currently another kind of energy-saving and environmentally friendly coating, radiation-curing coating, is booming. In recent years, under the requirements of environmental protection and energy conservation, radiation-curing coatings have become a branch of paint that has attracted much attention. It is basically free of volatile solvents, and it is cured by radiation because it does not require high-temperature baking to save energy. In view of the current status and development prospects of radiation-curing coatings, the reporter interviewed Hong Xiaoyu, chairman of the Asian Radiation Curing Association and professor of the Department of Chemistry of Tsinghua University yesterday.
According to Professor Xiaotao Hong, radiation curing is a 4E (economy, energy saving, environmental protection, and high efficiency) technology. The development of radiation-cured coatings stems from four driving forces: First, the solvent of the coating is actually an integral part of the film forming material. No solvent evaporation during film formation is an environmentally friendly coating; Second, the time required for light curing is usually as long as about 1 second, enabling rapid continuous coating, greatly improving production efficiency; Third, light Cured coatings do not need to be baked at high temperatures, eliminating the need for drying tunnels for thermal curing, which saves a lot of energy. If high-temperature curing is used, the energy required to cure the coating per square meter is 1600 kJ, and the energy required for radiation curing is only 64 kJ. Fourth, the photo-curable coating does not require high temperature, and therefore it can be used for coating materials that are afraid of heat, such as plastics. , paper and wood coating.
Prof. Xiaotao Hong told reporters that at present, China's radiation-curing coatings have been used on bamboo flooring, PVC gussets, paper, leather, plastic products, mobile phones, motorcycles and compact discs. The annual output of radiation curing products has reached about 20,000 tons, and it grows at a rate of 25% to 30% every year. Since the establishment of the China Radiation Hardening Association (now known as the China Photographic Society's Radiation Curing Professional Committee) in 1993, China's radiation curing technology and its products have achieved considerable development. At present, the association has four or five hundred member units, including more than 70 paint and ink production companies, more than 40 raw material companies, 89 light source and equipment manufacturing companies, and the rest are research institutes, application companies, etc. The unit is still increasing. The association’s industry activities are also booming. For example, it holds a domestic annual meeting and training class every year. It has held three Asian Radiation Curing International Conferences and two international exhibitions. Since 2003, the Chairman of the Asian Radiation Curing Association has been represented by the Chinese for the third consecutive time. This signifies that China has had a greater influence in the field of radiation curing in the international arena. In addition to the large output of products and a certain level of technology, the What is important is that the Chinese market has great potential. At the same time, the growth rate of radiation-curing coatings in Asia is already leading the global market.
In general, people in the industry believe that radiation curing is a good technology, but radiation-curing coatings have high technical barriers, high costs, and large investment in equipment. In response to this problem, Professor Hong Xiaoji believes that in the past, China's initiators, oligomers, and light sources all depended on imports, so the cost was high, but now these raw materials and equipment have been fully realized in China, and the prices of these products have been lowered. . And China has become the initiator of the world's largest producer, in addition to occupying the domestic market, but also achieved a large number of exports. The quality of domestically produced monomers and light sources has also been greatly improved, and has met the needs of general production. In addition, although the same weight of radiation-cured coatings will be more expensive than solvent-based coatings, 30% of solvents in solvent-based coatings will be volatilized and wasted. Therefore, in terms of the actual cost of coating, the radiation-cured coating is still more common than ordinary coatings. Competitive advantage.
When asked by reporters about the development trend of the industry, Prof. Hung expressed optimism about the prospects, because radiation-curing coatings meet the general trend of energy conservation and environmental protection. In just a decade, China's radiation-curable coatings have grown from being the start to the development and growing steadily, and have now developed into a place in the international market. However, he also stated that at present, China's radiation-curing coatings are still mainly used in some lower-end fields, and they still need to enter the high-end markets such as automotive coatings, coil coatings, optical fiber coatings, and electronic products. At the same time, they must develop light-cured powder coatings and cationic light. New coating technologies such as cured coatings, dual photocurable coatings, and electron beam cured coatings.
According to Professor Xiaotao Hong, radiation curing is a 4E (economy, energy saving, environmental protection, and high efficiency) technology. The development of radiation-cured coatings stems from four driving forces: First, the solvent of the coating is actually an integral part of the film forming material. No solvent evaporation during film formation is an environmentally friendly coating; Second, the time required for light curing is usually as long as about 1 second, enabling rapid continuous coating, greatly improving production efficiency; Third, light Cured coatings do not need to be baked at high temperatures, eliminating the need for drying tunnels for thermal curing, which saves a lot of energy. If high-temperature curing is used, the energy required to cure the coating per square meter is 1600 kJ, and the energy required for radiation curing is only 64 kJ. Fourth, the photo-curable coating does not require high temperature, and therefore it can be used for coating materials that are afraid of heat, such as plastics. , paper and wood coating.
Prof. Xiaotao Hong told reporters that at present, China's radiation-curing coatings have been used on bamboo flooring, PVC gussets, paper, leather, plastic products, mobile phones, motorcycles and compact discs. The annual output of radiation curing products has reached about 20,000 tons, and it grows at a rate of 25% to 30% every year. Since the establishment of the China Radiation Hardening Association (now known as the China Photographic Society's Radiation Curing Professional Committee) in 1993, China's radiation curing technology and its products have achieved considerable development. At present, the association has four or five hundred member units, including more than 70 paint and ink production companies, more than 40 raw material companies, 89 light source and equipment manufacturing companies, and the rest are research institutes, application companies, etc. The unit is still increasing. The association’s industry activities are also booming. For example, it holds a domestic annual meeting and training class every year. It has held three Asian Radiation Curing International Conferences and two international exhibitions. Since 2003, the Chairman of the Asian Radiation Curing Association has been represented by the Chinese for the third consecutive time. This signifies that China has had a greater influence in the field of radiation curing in the international arena. In addition to the large output of products and a certain level of technology, the What is important is that the Chinese market has great potential. At the same time, the growth rate of radiation-curing coatings in Asia is already leading the global market.
In general, people in the industry believe that radiation curing is a good technology, but radiation-curing coatings have high technical barriers, high costs, and large investment in equipment. In response to this problem, Professor Hong Xiaoji believes that in the past, China's initiators, oligomers, and light sources all depended on imports, so the cost was high, but now these raw materials and equipment have been fully realized in China, and the prices of these products have been lowered. . And China has become the initiator of the world's largest producer, in addition to occupying the domestic market, but also achieved a large number of exports. The quality of domestically produced monomers and light sources has also been greatly improved, and has met the needs of general production. In addition, although the same weight of radiation-cured coatings will be more expensive than solvent-based coatings, 30% of solvents in solvent-based coatings will be volatilized and wasted. Therefore, in terms of the actual cost of coating, the radiation-cured coating is still more common than ordinary coatings. Competitive advantage.
When asked by reporters about the development trend of the industry, Prof. Hung expressed optimism about the prospects, because radiation-curing coatings meet the general trend of energy conservation and environmental protection. In just a decade, China's radiation-curable coatings have grown from being the start to the development and growing steadily, and have now developed into a place in the international market. However, he also stated that at present, China's radiation-curing coatings are still mainly used in some lower-end fields, and they still need to enter the high-end markets such as automotive coatings, coil coatings, optical fiber coatings, and electronic products. At the same time, they must develop light-cured powder coatings and cationic light. New coating technologies such as cured coatings, dual photocurable coatings, and electron beam cured coatings.
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