With the requirements of urban development, smart bus shelters have also developed from single color to colorful. So in the process of spraying bus shelters, what is the difference between fluorocarbon spraying and powder spraying?

Generally speaking, electrostatic spraying is divided into powder spraying and fluorocarbon spraying. The raw materials of powder spraying are: polyurethane, polyurethane resin, epoxy resin, hydroxyl polyester resin and epoxy/polyester resin. colors. Features of powder spraying: spraying equipment is manual, automatic hanging type, simple construction, coating thickness of more than 30 microns, impact resistance, abrasion resistance, corrosion resistance, weather resistance, etc. Cheap. The biggest weakness of powder spraying is that it is afraid of the sun's ultraviolet rays. Long-term exposure will cause natural fading. The color difference between the sunny side and the non-sunny side of the aluminum plate is obvious after a few years, and it usually takes 2-5 years to produce obvious color difference.

Another type of electrostatic spraying is liquid spraying, also known as fluorocarbon spraying. It belongs to high-grade spraying. Due to its excellent characteristics, it is more and more valued and favored by the bus shelter industry. Fluorocarbon spraying has excellent anti-fading, anti-blooming, anti-corrosion of atmospheric pollution (acid rain, etc.), strong anti-ultraviolet ability, strong crack resistance and can withstand harsh weather environments. It is beyond the reach of ordinary coatings.

1. Fluorocarbon spraying raw materials and structure

Fluorocarbon spray coating is a coating made of polyvinylidene fluoride resin nCH2CF2 baking (CH2CF2)n(PVDF) as the base material or with metal aluminum powder as the color material. The chemical structure of the fluorocarbon base material is combined with a fluorine/carbon bond. This structure with short bond properties and hydrogen ions are considered to be stable and firm. The stability and firmness of the chemical structure make the physical properties of fluorocarbon coatings different from general coatings. In addition to abrasion resistance and impact resistance in terms of mechanical properties, it has excellent performance, especially in harsh climates and environments, it shows long-term anti-fading properties and anti-ultraviolet light properties. In 1965, Pennwalt Chemical Company of the United States first used polyvinylidene fluoride as the base material and metal particulate aluminum powder to synthesize architectural finish paint, also known as metallic paint, with a wide range of color choices, beautiful and solemn appearance, and durability for many around the world. The grand façade architecture adds to the brilliance. Coating manufacturers' guarantees for the service life of the coatings started from 10 years, and developed from 15 years to 20 years. American research institutions have tested and compared fluorocarbon coatings, super coatings, and general coatings. The coated samples were exposed to the scorching sunlight in Florida, USA, and exposed to the harsh environment of humid and salty air for 15 years. It is proved that the stability and durability of fluorocarbon coatings are 30 and 80 percentage points higher than the other two coatings, and fluorocarbon coatings are guaranteed to be used in various harsh environments.

2. Technical requirements and standards for fluorocarbon spraying

As a high-end surface coating process, fluorocarbon spraying has extremely strict quality requirements throughout the entire process. The entire surface treatment process of the coating manufacturer, including the pre-treatment process, the spraying process and the curing process, must be subject to strict quality control to ensure that The quality of the aluminum coating.

3. Equipment and technology of fluorocarbon spraying

The performance of the fluorocarbon coating itself is determined, and the spraying equipment must ensure excellent atomization effect to ensure the uniformity of the sprayed layer. The distribution of metal particles in the fluorocarbon coating directly affects the appearance of the coating. The coating is uniform, and the high-quality fluorocarbon coating has metallic luster, bright color and obvious three-dimensional effect. And the fluorocarbon spray coating with inappropriate spray equipment will produce uneven color, shadow on the surface or weak coating. It greatly affects the decorative effect of fluorocarbon. In order to achieve a good spraying effect, high-voltage electrostatic electric spray guns are used.

The differences between fluorocarbon spraying and powder spraying for the surface treatment of smart bus shelters are as follows. YEROO has been deeply involved in the industry for 22 years and has rich industry experience. It can provide one-stop project services from design, production, installation, etc. Welcome Consult to understand.