Coating is an important supporting material for the development of national economy, which is widely used in construction, real estate, transportation and other industries. In recent years, with the "flat, stable and fast" growth of China's economy, the coating industry has developed rapidly. Among them, the application technology of coatings in the field of aluminum profiles has made rapid progress, and some even produced a series of products.

As we all know, aluminum profile has the characteristics of low density, light weight, processing and plasticity, which is welcomed by the home field and construction field. At the same time, with the improvement of aesthetic quality and material level of users, aluminum materials for construction generally need surface treatment before they can be put on the market. After all, the aluminum profile without surface treatment, the appearance of a single color, it is easy to aesthetic fatigue.

Good surface treatment can not only effectively improve the appearance, texture, function and other aspects of the performance of the product, but also prevent the occurrence of corrosion and effectively extend the service life. The most important point is that it can easily cover up a small number of surface defects caused by the aluminum profile in the processing process and bring a rich and colorful surface effect. Therefore, the application of coatings is very important.

Some experts have said that the quality of the coating and the length of its service life will be restricted by three factors: surface treatment, accounting for 52%; coating construction, accounting for 13%; the quality of the coating itself, accounting for 35%. They are indispensable and must cooperate with each other.

According to the national standard GB / t5237-2008, the main surface treatment methods of building aluminum profiles are anodic oxidation, electrophoretic spraying, powder spraying, fluorocarbon coating spraying, etc. Different ways, the film properties also have their own characteristics. For example: the anodic oxidation film has high wear resistance, good insulation and corrosion resistance; the anodic oxidation composite film obtained by electrophoretic coating is equivalent to fluorocarbon coating, and the color difference is less than fluorocarbon coating.

Generally speaking, powder spraying is widely used in building aluminum profiles, which is a cost-effective coating solution with a wide range of applications. As a kind of electrostatic spraying, fluorocarbon spraying is expensive and of high grade. It has been widely used in aluminum curtain wall in recent two years in China. It can be said that it is a new kind of coating. Therefore, from the production table of China's aluminum extrusion products in 2019 - architectural aluminum profiles table, we can clearly see such a set of data comparison: powder sprayed profiles account for 73.5%, and fluorocarbon sprayed profiles account for 4.00%. But in any case, if the pre-treatment problems of the two are not handled well, they will also face great challenges.

The 25th China International Coatings exhibition, held from December 8 to 10, with the theme of "green manufacturing, moving forward side by side", from "renewable raw materials" to "easy spraying technology", from "low temperature curing" to "self-drying intelligence", from "revolutionary innovation of water-based resin" to "upgrading of auxiliary products", showed a lot of green products and intelligent manufacturing equipment.

From this, we can easily find three trends:

If coating enterprises want to make their products really popular, they must develop environment-friendly coating products such as green environmental protection and health.

In the future, there will be more environmental protection aluminum surface treatment new technology will be developed, and on the road of standardization. Coating enterprises need to know how to introduce international advanced automatic production equipment (high efficiency, low energy consumption equipment; environmental protection, safety, energy saving, automatic intelligent production line output), so as to raise the output and product quality to a new height.

High quality products need the introduction of new technology and strong innovation support. In recent years, we can see that the progress of coating technology and equipment is mainly reflected in the application of environmental protection coating materials, followed by production, reducing the discharge of waste water and slag, reducing costs, optimizing the production process and so on. This kind of change shows that the coating people are actively adapting to the social development and striving to gain a firm foothold in the new development pattern.

Nowadays, the coating industry is promoting the product value with high-quality development, and actively building a green industry. In the future, every coatings person will spare no effort to develop non-toxic and harmless materials, develop low energy consumption technology, improve the level of automation, focus on safety and energy conservation, environmental protection and sustainable development, and constantly strive to move forward with market orientation, traditional industrial economy as the basis, and the harmony between economy and environment as the purpose.

Part of the article comes from the Internet