A coating is a covering that is applied to the surface of an object, or substrate, and then a solid coating film or layer are formed on the substrate after the drying process.
In typical applications, the coating film should not be peeled off from the substrate and the purpose of coating film may be decorative, functional, or both.
In some other certain applications, a free stand film can also be made by the coating technology after the wet film is dried and peeled off from the substrate.
Coatings may be applied as liquids, gases or solids e.g. powder coatings. Normally 4 key kinds of ingredient are used for coatings. 1)Binders/Film forming materials/polymers. 2) Additives. 3)Pigments/Toners/Fillers/. 4) Solvents including water. 1) Binder (Resin/Film-Former): The backbone of the coating that forms a solid film and adheres it to the substrate. Examples: Natural and synthetic polymers like latex, polyethylene, waxes, and various resins. |
| These coatings are applied in a liquid state, but dry to leave a solid finish. Liquid coatings comprise a liquid carrier and solids, which are the components left once the coating is dried. There are numerous types of liquid coatings, solvent-based coatings, water-based coatings, high solid liquid coatings. |
| These coatings are applied in a fine powder state. They are based on polymer resin systems, combined with curatives, pigments, leveling agents, flow modifiers, and other additives. These ingredients are melt mixed, cooled, and ground into a uniform powder similar to baking flour. A process called electrostatic spray deposition (ESD) is typically used to achieve the application of the powder coating to a substrate. |
| Formula design |