The Concept Of "New Green" Has Gradually Become A Trend.

< p > < strong > domestic fan blade coating market is diversified. < /strong > < /p >

< p > China's fan blade industry started late, and the solvent coatings used for fan blades were once imported to meet the market demand.

However, in recent years, the industry has developed rapidly, and the market has gradually matured. It has formed a diversified management pattern jointly guided by foreign-funded enterprises, private enterprises and research institutes.

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< p > Northwest Yongxin group and Northwest Normal University have developed organic fluorosilicone modified polyurethane polyurethanes urea resin, and new type of wind power coatings have been innovated in structural design and manufacturing process. They have achieved or surpassed foreign wind power coatings products in terms of wear resistance, elastic elongation, adhesion, impact resistance, sand resistance and ultraviolet radiation protection.

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< p > the abrasion resistant elastic polyurethane curing agent developed by CNOOC Changzhou coatings and Chemical Research Institute is a kind of elastic polyurethane curing agent (EPU curing agent) which has good sunlight fastness, abrasion resistance, mechanical properties and excellent adhesion to composite materials. Compared with the traditional HDI trimer curing coating, it has obvious advantages and is also suitable for the protective coating of wind turbine blades.

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< p > COSCO Kansai coating and Chemical Industry Co., Ltd. R & D center has developed a waterborne polyurethane finish for fan blades.

The performance of this product's topcoat and its coating film is based on the relevant index of waterborne polyurethane finish in Kansai, and based on the performance data of the mainstream fan blade products and the actual geographical and natural environment in China.

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< p > in addition, Bayer Material Technology (China) Co., Ltd., AVIC Bermuda new material technology engineering Limited by Share Ltd, Shanghai Xi Cai Industrial Co., Ltd. also introduced excellent solvent based wind turbine blade coating products.

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< p > < strong > < a > href= < http://www.91se91.com/news/index_c.asp > < < /a > deficiency and high loss problem remains to be solved < /strong > /p >

< p > China's wind field is generally located in the "Three North" area with strong wind and sand or offshore and offshore areas. These are two completely different environments. The requirements for the performance of blade coatings vary greatly. Judging from the current development, the first use environment dominates in China.

The effective protection depends on the design, surface treatment, coating process, coating quality and coating quality control.

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< p > however, the current domestic solvent coatings for wind turbine blades are still facing high loss technical problems.

Liu Huicheng, deputy chief engineer of COSCO Kansai coatings chemical industry Co., Ltd., said that the wind turbine blade coating must resist the ultraviolet light's effect on the resin first, and then withstand the erosion of wind sand, floating dust and rain fog.

If the first is chemical protection, the second is much more difficult than the first one, because the blade tip speed can reach 80 m / sec during the normal operation of the wind turbine blade. The sand or water droplets in the wind will have a strong impact on the surface of the blade. If the coating is resistant to sand erosion or rain erosion, the protective coating will lose significantly in a few years, and it will not last for 20 years.

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< p > in addition, < a href= "http://www.91se91.com/news/index_c.asp" > wind power blade coating < /a > wind resistant sand standard is still missing.

The wind turbine blade coatings have just started in China. At present, the relevant departments of the country have not yet established the authoritative standard for wind sand resistance of the blade coating film.

Because there is no wind power blade coating industry standard, there is no clear technical reference for coating enterprises in the development of leaf coatings. They usually rely on their own understanding and some requirements provided by leaf producers to formulate enterprise standards, which are not necessarily comprehensive and may not meet the actual requirements of wind farms in China.

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< p > < strong > waterborne wind power < a href= "http://www.91se91.com/news/index_c.asp > > coating > /a > fill in domestic technical blank < /strong > /p >

< p > China is the fastest growing country in the world wind power blade coatings market. Its annual output reaches about 5000000 tons, ranking second in the world.

IHS, a leading energy consultancy, released a report in April 2nd that China will overtake Europe this year to become the largest market in the global wind energy industry.

According to IHS's report, although the solvent based wind power blade coating still dominates the market, waterborne wind power coatings are more in line with the development of green new energy concept, and its "new green" characteristics will help them become the protagonists in the future wind power blade coatings market.

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< p > water environmental protection coating water is used as dispersing medium and diluent. The raw materials used in the coatings are innocuous and harmless, so the paint is also non-toxic and non polluting.

The biggest difference between waterborne coatings and solvent based coatings is the use of water as solvent, which greatly reduces the emission of volatile organic solvents.

Freshwater resources, as one of the most common resources, greatly simplify the process of coating dilution.

At the same time, the new material is very convenient for pportation and storage. These characteristics are unmatched by organic solvent coatings.

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< p > Shen Ming, Professor of materials engineering of Anhui Engineering University, pointed out that the waterborne wind turbine blade coating has good water resistance and good sun fastness. After finishing the coating, the three composite coatings can reach 220 microns and can be used for more than 20 years. It not only fills the gap in China, but also is one of the most advanced technologies in the world.

In Europe and the United States, due to strict environmental standards, a green road for powder coatings and waterborne coatings has been formed, while the proportion of waterborne coatings for domestic wind turbine blades is still low. However, with the promotion and support of the government and industry, it has a very broad development prospect.

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< p > but Professor Shen Ming also believes that the waterborne coatings road is not as easy as it imagined, and there are still many problems. First of all, the cost increases, the first is the upgrading of coating production and coating equipment, and the two is the rising cost of raw materials.

Secondly, the hardness of waterborne coatings and the ability to resist wind erosion and ultraviolet radiation still need to be strengthened. How to make the waterborne wind power blade coatings meet the needs of China's climate characteristics is a problem that the coating enterprises need to solve.

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