Home    应用领域    Powder coating: low carbon environmental protection into the new favorite of the industry

 Recently, the Environmental Protection Department of Guangdong Province announced the “Implementation Plan for Special Actions for Ozone Pollution Prevention and Control in the Pearl River Delta Region in 2017 (Consultation Draft)”, which puts forward specific requirements for VOCs emissions in the field of paint coating, and plans to adopt peak production and limit for coating enterprises. Measures to produce and suspend production, in order to strengthen the control of VOCs emissions in the Pearl River Delta region, curb ozone pollution in the fall of 2017, promote ozone concentration into the decline channel, and improve regional ambient air quality. In fact, the coating industry as a key area for VOCs emission reduction, the difficulty of governance is very large, especially in the use of links, such as steel structures, containers, ships, fences, traffic markings and other open-air painting, the operability of VOCs end treatment is very difference. Although the government departments have vigorously promoted the use of new materials such as water-based paints and implemented “oil-free orders” that limit organic solvent coatings, traditional solvent-based coatings still account for half of the total market. However, the innovation pattern of China's coatings industry has begun to improve, and the application of new materials and new technologies in the coatings industry continues to rise.

The data shows that in 2016, China's powder coating industry output reached 1.7 million tons, an increase of 13.4%. Because powder coatings are solvent-free, non-polluting, recyclable, environmentally friendly and energy-saving, they have become the “new darling” of the industry. Many large-scale coating companies are planning to distribute powder coatings with zero emissions of VOCs.

In the coating industry, the VOCs emission reduction task is arduous.

Recently, in the seventh round of intensive supervision of the Ministry of Environmental Protection's Air Pollution Prevention and Control Intensive Inspection Team, a total of 5,322 enterprises (units) were inspected, and 1389 gas-stricken enterprises were found to have environmental problems, among which VOCs existed. The 536 governance problems accounted for 38.6% of the total number of environmental problems found in this round of inspections. From the industry point of view, coatings and spraying are the primary problems. It is common for enterprises to fail to construct or idle or stop VOCs treatment facilities. “The coating industry is characterized by concentrated emissions and high pollution. About 7 million tons of solvent need to be volatilized every year, which is more serious than automobile exhaust gas.” Yang Xianghong, senior paint industry expert and chairman of Suzhou Austin New Materials Technology Co., Ltd. said. Yang Xianghong said that China is a big paint producing country, but it is not a strong country. According to statistics of 1,400 enterprises above designated size, the output in 2016 is close to 20 million tons, and the output value exceeds 400 billion yuan. However, the core technologies of some high-end coating products are not mastered, and even the coatings for high-speed rails are mostly from foreign companies. “A large number of low-end coating products have become the main source of VOCs in the industry. However, due to various factors, solvent-based coatings still have huge market demand for a certain period of time.” It is understood that VOCs emissions have always been a key issue for green environmental protection. As the major emitter of VOCs, the coatings industry has repeatedly been listed on the “list” of the polluting industry. The "13th Five-Year Plan for the Prevention and Control of Volatile Organic Pollutants" issued by the Ministry of Environmental Protection proposes to promote the emission control of industrial coating VOCs in the manufacturing industries of containers, automobiles and furniture, and promote the use of water-based paints and high-solid powder coatings in related fields. However, Yang Xianghong pointed out that the above two coatings still contain a certain amount of solvent, and it is difficult to monitor and control the relevant emissions in open air use.

The market share of powder coatings continues to increase.

Solvent-based coatings still have huge market demand for a certain period of time. The powder coating is a solid powder coating material which is present in the form of a fine powder, which is transferred to the object to be coated in a powder form, and is baked and melted to form a film. Yang Xianghong said that powder coatings achieve zero waste and zero pollution during the manufacturing process, and the scrap produced in production can be basically recycled. Powder coating can meet the requirements of anti-corrosion and decoration in many fields, and the utilization rate of powder spraying is high. For paints of the same thickness, the area of ​​powder coatings is more than double that of conventional solvent-based coatings. From the cost point of view, among the several types of coatings currently in use, the price of powder coatings is also the lowest. At present, powder coatings have been widely used in household appliances, automobile wheels, metal doors and windows, etc., and the market share of the industry continues to rise, currently reaching about 10%. It is reported that China's powder coating enterprises are mainly distributed in the coastal areas, and the sales of powder coatings in the three major coating industry bases in the Yangtze River Delta, Pearl River Delta and Bohai Rim regions account for 94% of the national total. “10% market share tells us that powder coatings meet the dual needs of environmental protection and the market, and have become the third largest coating after latex paints and solvent-based coatings. If we want to further promote the rapid development of powder coatings, To solve the problem of its weaknesses, if the curing temperature is successfully reduced, not only can the energy consumption be greatly reduced during the coating process, but also the powder coating can be applied to a wider range." Yang Xianghong said. It is reported that the Guangdong Coatings Industry Association has organized a number of coatings companies and experts to discuss the application of powder coatings in the field of wood furniture. The secretary-general of the association, Lu Shuilie, proposed at the seminar that the environmental transformation and upgrading of coatings should be comprehensively considered in various ways. It should not be limited to the idea of ​​water. The combination of powder coating and wood furniture is worthy of attention and consideration.

In the process of transformation and upgrading of the coatings industry,

According to the "13th Five-Year Plan for the Prevention and Control of Volatile Organic Pollutants", before the end of 2017, 60 container manufacturers with 5.6 million TEU production capacity will complete the replacement of water-based environmentally friendly coatings and build terminal treatment facilities; By the end of 2020, 13,000 automobile manufacturing enterprises, 3,400 wooden furniture manufacturing enterprises, 600 shipbuilding enterprises, 1,300 construction machinery manufacturing enterprises and 5,000 steel structure manufacturing enterprises will complete low-VOC coating substitution and low VOCs emissions. Painting process modification and end treatment engineering construction. Yang Xianghong said that in order to achieve the above objectives, the upgrading of the coatings industry is imminent. At present, the annual use of paint in the country is about 25 million tons, the traditional solvent paint accounts for about 54%, the water-based paint accounts for about 35%, and the powder paint accounts for about 10%. In order to eliminate solvent-based paints, it is necessary to increase the research and development of core technologies, formulate more stringent VOCs emission standards, and accelerate the upgrading and transformation of backward production capacity. At the same time, the government should also speed up project approval and support for the application of new materials and new technologies. For example, Yang Xianghong said that the same production capacity, the powder coating company's floor space and production costs are only half of the traditional solvent coating companies, the new materials, new technologies to support the mass production, the old backward production capacity can only choose to upgrade or be Eliminated. In Yang Xianghong's view, if the powder coatings are to be vigorously promoted, the original production equipment and painting equipment of the enterprise need to be replaced, and at the same time, it is necessary to break the pattern of the original production and sales chain, which is difficult. “A domestic agricultural machinery leader said that water-based paints are too cumbersome to use and costly. If powder coatings are used, there are too many things to change, or traditional paints are comfortable. So, it’s not just technology that changes. There are also concepts. The government should adopt a completely different policy for new and old technologies, the support of the support, the limitation of the restriction, and the elimination of the elimination, in order to improve the overall level of the coatings industry.


Powder coating: low carbon environmental protection into the new favorite of the industry

2019年2月27日 18:27