What are the applications of powder coatings?

Yantai Kebaida Environmental Protection Materials Co., Ltd. warmly reminds us that powder coating is a solid powder synthetic resin coating composed of solid resin, pigments, fillers, and additives. Unlike common solvent based and water-based coatings, its dispersion medium is not solvent and water, but air, with the characteristics of no solvent pollution, 100% film formation, and low energy consumption. There are two types of powder coatings: thermoplastic and thermosetting. Thermoplastic powder coatings have poor film appearance (gloss and leveling), poor adhesion to metals, and are rarely used in the field of automotive coatings. Thermosetting powder coatings are commonly used for automotive coatings. Thermosetting powder coatings use thermosetting synthetic resins as film forming materials. During the drying process, the resin is first melted and then chemically cross-linked to form a flat and hard film. The appearance, mechanical properties, and corrosion resistance of the paint film can meet the requirements of automotive coating.

What are the applications of powder coatings?

The major growth areas of the Chinese powder coating market are: shipbuilding and pipeline industry. The existing problem is that impact resistance and moisture absorption need to be improved, and researchers focus on the modification of various substrates. Compared with foreign excellent products, there is still a certain gap in the storage stability and coating workability of epoxy powder coatings for pipeline anti-corrosion in China.

Due to the progress in the preparation technology of automotive powder coatings abroad, automotive coatings, wood and plastic coatings are potential markets with vitality. The automotive industry will be a big consumer. The powder coating market in Greece, Türkiye and Eastern Europe has a good growth momentum, and the Asia Pacific region has greater market potential, which has been regarded as a region with rapid growth in the world.

What is the manufacturing process for powder coatings?

The coating is made by mixing a certain proportion of special resins, pigments and fillers, curing agents, and other additives, and then undergoing hot extrusion, crushing, and sieving. They are stored stably at room temperature, and after electrostatic spraying, friction spraying (thermosetting method), or fluid bed immersion coating (thermoplastic method), they are heated, baked, melted, and solidified to form a flat and bright permanent coating film, thereby achieving the purpose of decoration and corrosion prevention.

What are the construction requirements for powder coatings?

(1) In order to give full play to the characteristics of powder coating and extend the service life of the coating film, the surface of the object to be coated should first be strictly treated.

(2) During spraying, the object to be coated must be completely grounded to increase the spraying efficiency of the powder coating.

(3) For coated objects with large surface defects, conductive putty should be applied to ensure the smoothness and smoothness of the coating film.

(4) After spraying, it is necessary to heat and solidify the object. The curing conditions are subject to the technical specifications of the powder product, but the curing temperature and time must be fully guaranteed to avoid quality accidents caused by insufficient curing.

(5) Check immediately after spraying powder.

(6) After screening and removing impurities, the recovered powder is mixed with the new powder in a certain proportion.

(7) The powder supply barrel, powder spraying room, and recovery system should avoid contamination by other powders of different colors, so each time the color is changed, it must be purged clean.