Method for producing a functional coating and a functional coating formed on a sandwich-type composite substrate

Abstract

The subject of the application is a method for producing a functional coating, which consists in applying a layer of metal powder (2) in the form of aluminum, or metal oxide powder in the form of Al2O3, or semimetal oxide powder in the form of quartz sand with a grain size ranging from 50 to 300 µm to a forming tool using a frame (9) and a scraper (11). Next, glass fiber fabrics (3) are placed on the powder layer (2), and a core material (12) is applied to the core material (12). Subsequently, the core material (12) is covered with successive layers of glass fiber fabrics (3). A separating fabric (4), a perforated foil (5), and a distribution mesh (6) for infusion are then applied to the fiber layers (3). A spiral tube (7) for resin introduction and a spiral tube or microporous tube for air removal are then placed on the forming tool (1) adjacent to the layers.Then, the forming tool (1) is connected with the vacuum foil (8) covering the layers and tubes using a sealing tape (10), and a pressure of 250 to 350 hPa is created inside the space between the forming tool and the vacuum foil, and a resin with a viscosity in the range of 160 - 325 mPa s is introduced and the space is filled. The subject of the application is also a functional coating made on a "sandwich" composite substrate, which consists of a hardened epoxy or polyester resin and a hardened metal powder (2) in the form of aluminum, or a hardened metal oxide powder in the form of Al2O3, or a hardened semimetal oxide powder in the form of quartz sand.