EnglishViews: 209 Author: Julong Publish Time: 2023-09-14 Origin: aluminum panel systems manufacturer
Both polyester paint and fluorocarbon paint have customers in the aluminum sheet business. To help readers choose the best surface treatment for aluminum plates, this article discusses the similarities and differences between polyester paint and fluorocarbon paint. This will help readers have a general understanding of the two paint types. Click here for Pvdf Coating Aluminum Solid Panel.
Kynar-500 and hylur-500 are used as the foundation components in a type of paint known as fluorocarbon paint, sometimes known as PVDF. It is made up of 30% acrylic resin, colors, and additives and 70% fluorocarbon resin. The fluorocarbon paint coating has several unique qualities that are better than those of regular coatings because the resin molecule has the C-F bond with the highest bond energy in the organic medium. In contrast to other coating types, PVDF coatings have exceptional qualities because of the injected fluorine's high electronegativity and the robust carbon-fluorine bond energy. Some of its benefits include resistance to chemicals, heat, low temperatures, and the elements. Additionally, it has special non-stick and low friction qualities, making it impossible for dirt to stick to the surface, making it an excellent choice for outdoor wall decor.
Three parts make up polyester paint: the main color, the thinner, and the curing agent. A styrene solution of unsaturated polyester serves as the primary ingredient, along with initiators (also referred to as curing agents, hardeners, and accelerators) and accelerators. With an ethylenic monomer (styrene) acting as the active solvent, the unsaturated double bond in the saturated polyester's main chain goes through a radical copolymerization reaction and is then cured to create a film.
Polyester resin serves as the primary film-forming component in polyester paint. Unsaturated polyester paint is another name for polyester paint. It is a thick, multi-component paint using polyester resin as its primary film-forming component. The polyester paint film is full, the layer is thick, and the surface is rough. Polyester varnish is a type of varnish that can be used with polyester paint. The number of these curing agents makes up about one-third of the entire volume of paint and is necessary to cure polyester paint during the construction process. Toluene diisocyanate, generally known as TDI, is the major component of these curing agents, which are also referred to as hardeners.
The fluorocarbon paint is less luminous than the polyester topcoat from the perspective of appearance. While fluorocarbon paint can only achieve a gloss of around 80 degrees, polyester topcoats can achieve a gloss of about 95 degrees.
The four main categories of polyester paint are high-gloss, brilliant, semi-matte, and matte. The most popular product right now is matte paint. Paint is separated into many categories based on how the coating film looks, including varnish, color paint, dull, matte, high-gloss, hammer paint, etc. The fundamental component of matte paint is varnish, which is combined with the proper quantity of a matting agent and supporting components. The gloss of the paint coating varies depending on the various matting agent concentrations. The gloss of matte paint films is soft, consistent, smooth, temperature-, water-, acid-, and alkali-resistant. High-gloss paint is a premium interior decorative paint that is utilized particularly on surfaces like wood buildings, gypsum ceilings, and internal cement walls.
Despite having high weather resistance, PVDF and polyester paint nevertheless differ slightly from one another. Fluorocarbon paint outperforms polyester topcoats in the same outdoor environment in terms of gloss retention, anti-corrosion, and anti-rust properties. The latter only has a service life of roughly 8 years, or even less if the paint quality is subpar, whereas the former can retain a service life of 10-15 years.
Fluorocarbon paints also have certain benefits in terms of the ability of paint films to self-clean. Fluorocarbon paint has a surface that resists contamination from dust, oil, and other contaminants and is simple to clean. Topcoats made of polyester lack this characteristic.
When making a choice, cost is always an important consideration. In terms of cost, the polyester topcoat offers a significant benefit. It is almost half of PVDF paint's price.
The phases involved in spraying and coating thickness are where polyester paint and PVDF are most similar to one another.
The primer coating is painted as the first phase in the polyester paint spraying process for aluminum veneer. The aluminum veneer substrate's primer layer serves as its primer ornamentation. This layer is employed as an inherent defense and primarily works to increase the coating's penetration resistance during final finishing. Primer painting serves to protect the aluminum veneer material. By doing this, it is possible to stabilize the material's surface effect, provide good consistency in the finishing effect, and enhance the adhesion between the topcoat material and the metal plate. The thickness of the primer is typically between 5 and 10 microns.
Topcoat coating is the next phase. The aluminum veneer material can be made more attractive by the topcoat coating, which also gives it a decorative look, making it better suited for use in building decorating. In addition, a top coat can shield aluminum veneer from exposure to the elements, protecting it from contaminants such as acid rain and slowing down the material's aging process. Typically, the topcoat's thickness must be kept under control around 20 to 30 microns.
The third phase is the varnish coating process. The varnish treatment is mostly done to improve the surface's gloss, protect the topcoat coating's integrity, and strengthen the coating's resistance to invasion by the outside environment. The varnish covering must typically be between 5 and 10 microns thick.
The curing treatment comes next. The aluminum alloy material must be kept in the curing furnace for high-temperature consolidation during this process, where the temperature is maintained between 180 and 250 degrees Celsius. Depending on the materials they create, various aluminum veneer producers will regulate the temperature and time to a certain level.
One similarity between polyester and fluorocarbon paint is that both can be used both inside and outside, while there are also small variations. Because of its anti-yellowing, weather-resistant, corrosion, and UV resistance, as well as many other features, fluorocarbon paints are more frequently utilized outside. Indoors, polyester paint is increasingly prevalent.
It should be remembered that polyester paint requires curing during construction, and one-third of the overall paint quantity is made up of these curing ingredients. Toluene diisocyanate, generally known as TDI, is the major component of these curing agents, which are also referred to as hardeners. These unpaid TDI will change to yellow. Polyester paints that are "yellow-resistant" have just entered the market, although they can only be "yellow-resistant" and cannot entirely stop yellowing. Additionally, free TDI above the level is harmful to human health. Sensitization and stimulation are the key effects that free TDI has on the human body. Free TDI is restricted to a global limit of less than 0.5%.
The extended service life and other excellent qualities make fluorocarbon paint the top choice for aluminum panel customers, even though polyester paint will turn yellow and might be harmful to human health, despite being superior to fluorocarbon paint in terms of price and appearance.
