Significance of the integration of coating and coating on the development of coating industry

Views:685 Author:Site Editor Publish Time:2020-09-27 14:12:36 Orgin:Site

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At present, despite the rapid development of China's coating industry, however, the imbalance of the development of coating and coating integration is gradually reflected, mainly for the relatively lagging behind of coating. There is a saying in the industry that "three coatings and seven construction", which fully reflects the importance of painting. Only through coating can the coating be applied in practice, can it show the colorful characteristics, as well as antifouling, anti mildew, anti-corrosion and other functions. The market voice of the integration of coating and coating is getting higher and higher. In the development of coating industry, it is also necessary to pay attention to the matching connection of coating, so as to achieve win-win cooperation between upstream and downstream enterprises.

1. The integration of coating and coating has become the future development trend of coating industry

Coating integration refers to the integration of coating products and coating line. Although China's coating industry started late, it has developed rapidly. In the tide of economic development of low carbon and environmental protection, the coating industry is developing towards water-based, and various innovative scientific research products are constantly launched. However, due to many factors, the pace of development of coating and coating is inconsistent, and the coating technology and level is relatively lagging behind the development of coating, which largely restricts the development of coating industry.

2. The use environment of waterborne coatings is limited

Code for treatment of waste residue and wastewater

At present, the development of water-based paint at home and abroad is not very smooth, only 20 years of history, far from the development history of oil-based paint. From the current promotion of waterborne coatings, water-based coatings are in a state of disordered competition, which does not meet the needs of the market.

There is no relevant system for the treatment of water-based paint residue and cleaning water. The existing exclusion and identification are not dangerous goods. It is not a concept. The detailed rules should be recognized by the local environmental protection department. The VOC content of water-based coatings must be controlled below the national standard, and the VOC content of water-based coatings can reach below 50g or even lower.

The cost of waterborne coating is high

The cost of waterborne coatings is still high. On the one hand, the cost of raw materials of waterborne coatings is high. On the other hand, spectral analysis of various components, heavy metals and so on are also the difficulties in the promotion of waterborne coatings. From the research and development to practical application, if the real water-based coating reaches the same performance as the oil-based paint, the cost will certainly be higher than the existing oil-based paint products.

4. Integration of coating and coating

Improve the utilization rate of Waterborne Coatings

In the field of freight cars, CRRC has stipulated that before the end of 2019, all enterprises of freight car products will fully promote the use of water-based paint; by the end of 2020, all enterprises of locomotive products will fully promote the use of water-based paint; all enterprises of passenger car products and urban rail metro vehicles will promote the use of water-based paint; all enterprises of accessories products will promote the use of water-based paint. Due to the fact that there are many branches of CRRC and the environment of each plant is different, the production line must be reformed. The baking conditions, temperature and humidity control, wind speed and other issues must be provided to reflect the performance of waterborne coatings. In the process of construction, the humidity in the south is high, and it is difficult to solve the problem without baking conditions.

For water-based paint, thick coating is difficult. For onshore wind power, the film thickness is 240um inside and 280um outside; for offshore wind power, the film thickness is 280um inside and 320um outside. Such a thick film thickness is really difficult for water-based coating. If forced thick coating, the dry film thickness is relatively high, multiple coating processes are required, and the solid content of coating is required to be increased, but the water-borne paint has high solid content, and the solid content of primer and intermediate paint can meet the requirements. The solid content of top coat can reach 50%, which is difficult to exceed 60%. A layer of dry film thickness of 50% solid content is about 20-30um. If the requirement of 120um is required for the top coat, it should be at least 3-4 Road, not only the cost of coating products is high, but also the labor cost in the construction process is high.

The performance and equipment of waterborne coatings are upgraded together to promote the development of industry. The upgrading of waterborne coatings products needs the support of raw material enterprises. The scratch resistance and hardness of waterborne coatings can be improved by improving the performance of raw materials.

The spraying equipment of waterborne coatings also needs to be upgraded, such as electrostatic spraying and solvent-free spraying, which can greatly improve the utilization rate of coatings.