NEWS

Under this new situation, in order to make new and old engineers and technicians engaged in the development of new powder coatings for Hangzhou sprayers do not detour or detour when developing and designing powder coating formulations, based on years of experience in R&D and production, Talk about the design of powder coating formulations.

    1 Add a matting effect filler to the formulation, such as adding matting barium sulfate, ultrafine kaolin, ultrafine silicon powder, ultrafine mica powder, and the like. The extinction method has certain limitations. The addition of the filler film is not good, and the addition of the matte effect is poor. This method is suitable for all resin varieties of powder coatings.

    2 Add a matting agent with a matting effect to the formulation. The matting agents commonly used in powder coatings are wax type matting agents and resin type matting agents. The wax type has a poor dry powder flow of the powder coating, and the surface of the coating film is easy to form a waxy shape and the extinction effect is limited. Although the resin type matting agent does not have the disadvantages like a wax type matting agent, the physical strength and the like such as the impact strength of the coating film are not good, and there are certain limitations. Powder coatings of various resin types have the following types of matting agents, that is, matting agents used in weather resistant powder coatings can be used in indoor powder coatings, but matting agents for indoor powder coatings may not be used in Outdoor powder coating. In recent years, a matting agent for matting and matting of a matting agent and a powder coating has been developed. This powder coating is convenient to prepare and use, but the flatness of the appearance of the coating film is not as good as that of the melt-extruded mixed matting powder coating.

    3 Add matting curing agent to the formulation. This extinction method has a wide matting range in epoxy and epoxy-polyester systems. It is easier to adjust the gloss of the coating film, and the flatness of the coating film is better; considering the cost of the coating, When the filler and matting agent are not used to achieve the gloss required by the user, the formulation can be considered to use a matting curing agent.

    4 different reactive methods of dry mixing of two powder coatings. The flatness and fineness of the coating film obtained by this method are not as good as the appearance of the coating film obtained by other methods, the stain resistance of the coating film is not good, and the gloss range of the coating film is relatively narrow.

    The powder coating formulation design of Hangzhou spraying machine is a very complicated process. On the one hand, it must have a solid theoretical knowledge of powder coating, and timely grasp the information of raw materials and new materials used in the industry; on the other hand, it needs to be summarized in production practice. Experience, find out the regularity, improve the theory to understand; then the cost of the market economy is the main factor, the price of the product in the spray coating design of Hangzhou spray paint should be reasonable; there is also a problem in production and use The formula is constantly adjusted and improved to meet the requirements of users.