EnglishViews: 201 Author: Julong Publish Time: 2023-09-14 Origin: aluminum panel systems manufacturer
One of the often-used surface treatments for aluminum plates is polyester paint. The polyester paint used in the spraying process of aluminum veneer panels is primarily introduced in this article. We have created a content directory so you can easily discover the information you require. You will be brought to the corresponding section when you click on it.
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. Related product: Polyester Coated Panel Sheets.
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.
These unrestricted TDIs, however, will turn yellow. One significant drawback of polyester paint is that it causes the surrounding walls as well as the surface of the object it was painted on to turn yellow.
Polyester paint on the surface of aluminum veneer typically has a service life of 5 to 12 years. The quality of the polyester paint itself as well as the placement of the aluminum veneer during application will both have an impact on its service life. The polyester-painted aluminum veneer will have a fairly long service life if fitted indoors. The service life will be rather brief if it is outdoors. Julong will make sure that the polyester paint is of high quality and prevent paint peeling and staining, both of which would be detrimental to the customers' experience.
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.
The polyester paint layer, or topcoat coating, is applied in the second stage. An essential stage in decoration is spraying the polyester paint in the appropriate color on the aluminum veneer's surface according to the design specifications. 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, polyester paint can stop the aluminum veneer material from coming into direct contact with outside air, protecting it from acid rain, contaminants, etc., and slowing the rate at which the material ages. Typically, the topcoat's thickness must be kept under control around 20 to 30 microns.
the final varnish coating stage. 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 following step is curing treatment, which further consolidates the three-layer coating to improve the ornamental appearance of the aluminum veneer. 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.
Paint made of polyester offers several benefits. The paint coating is thick and has a really rich color in addition to that. It can thoroughly cover the foundation layer material after being sprayed two or three times. Thus, the metal panel can be painted with polyester paint by brushing it directly on it. There are not many material needs. The polyester paint film offers great all-around performance. The paint film has enhanced hardness, hard wear resistance, high richness, and resistance to damp heat and dry heat as a result of the employment of a curing agent.
Depending on the materials they create, various aluminum veneer producers will regulate the temperature and time to a certain level.
The stages involved in creating polyester paint are challenging, and the accelerator-to-initiator ratio must be meticulously adhered to. The activation phase after the paint has been mixed is brief and must be finished in 20 to 40 minutes; otherwise, the paint will gel and become useless. The damaged paint film has impressions after repair, and its repair ability is likewise subpar. During construction, polyester paint needs to be cured, and one-third of the entire paint is made up of these curing chemicals. Toluene diisocyanate, generally known as TDI, is the primary ingredient in these curing agents, which are also known as hardeners. These unpaid TDI will change to yellow. One significant drawback of polyester paint is that it causes the surrounding walls as well as the surface of the material it is painted on to turn 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%. Julong will adhere strictly to international norms to prevent harming customers.
In this article, one of the paints used for spraying aluminum veneer panels is briefly introduced from the standpoint of polyester paint's benefits and drawbacks. It is clear from reading the article that polyester paint is not the best option for spray painting. You can read Julong's articles on PVDF and powder coating to learn more about how aluminum panels are treated on the surface and how to select the best coating technique for your aluminum veneer panel.
