What is the preparation process of polyester powder coating?
Raw material preparation:
The main raw material of polyester powder coating is polyester resin, which is a polymer compound polymerized from ester monomers. In addition to polyester resin, pigments, additives and fillers need to be added to meet the requirements of different applications.
First, polyester resins, pigments and other additives are accurately weighed according to a specific recipe. The ratio and formulation of these raw materials will determine the performance and color of the coating.
Polyester powder coatings are usually cured by chiralization. Chiralization means that the powder coating becomes solid and adheres to the surface of the object to be coated through thermal curing or chemical reaction. Commonly used chiralization methods include thermal curing and ultraviolet (UV) curing.
Apply the premix evenly on the surface of the object to be coated. This can be done by methods such as spraying or electro-static spraying. When spraying, it is necessary to ensure the thickness and uniformity of the coating and the efficiency of the coating.
Once the coating is complete, the object needs to be cured in an oven or with UV radiation. During curing, the cross-linking reaction in the polyester resin causes the powder coating to form strong chemical bonds at high temperature, allowing it to bond to the surface of the object being coated.
Cooling and inspection:
After curing, the coating needs to be cooled to room temperature and subjected to quality inspection. This includes checking whether the thickness, adhesion, appearance and color of the coating meet the requirements.
Packaging and storage:
The inspected and qualified polyester powder coating will be packaged and stored under proper conditions to ensure its performance remains stable during storage.
In terms of maintenance and maintenance after painting, what are the recommended methods and precautions?
Regular cleaning of the coated surface is an important measure to maintain its appearance and performance. Use mild soapy water or neutral detergent with a soft cloth or sponge to gently wipe the coated surface. Avoid using cleaners that contain abrasives or acidic ingredients as they may damage the coating.
Protection from scratches and bumps:
During use and maintenance, care should be taken to prevent the coating from being scratched and collided by sharp objects. Avoid direct contact with the coated surface with hard objects or sharp tools to avoid scratches or damage.
Avoid chemical corrosion:
Avoid contacting the coating with chemicals such as strong acid, strong alkali or organic solvents to prevent chemical corrosion and damage to the coating. If the coating accidentally comes into contact with these chemicals, it should be rinsed off with clean water immediately and repaired in time.
After the coating has been used for a period of time, check its surface regularly for damage or aging. Timely detection of problems and repairs can extend the life and performance of the coating.
Touch-ups and restorations:
If local damage or peeling of the coating is found, it should be repainted and repaired in time. Before touch-up painting, the dirt and loose parts of the coating surface should be removed, and then repaired according to the method recommended by the paint manufacturer.
Avoid prolonged exposure to extreme environments:
Long-term exposure to extreme weather conditions, such as strong sunlight, cold or humid environments, may affect the color and performance of the coating. If possible, try to keep the coating under stable environmental conditions.
If the coating has aged or become damaged beyond years of use and cannot be repaired, consider periodic recoating to keep the surface looking clean and protected.