Most decorative aluminum sheets, as the name hints, are coated with paintings. As explained in Coloured Aluminium Sheet Coat Types, classified by the function, there are two types of paintings: base coat and finish coat. Details about further classification will not be elaborated here. Readers interested in them, please refer to Coloured Aluminium Sheet Coat Types by clicking the title. Here we are going to talk about composition of these paintings.
Any type of painting for decorative aluminium sheet is composed of four parts: resin, color, solvent and additive. Resin, which helps a painting to form film, is also referred to as base material. It functions as the base and key composition of a painting, deciding the property of the coated film. Resin shows very stable property in storage, without any obvious physical or chemical changes. It forms film quickly on a piece of decorative aluminum sheet under given conditions. There are many kinds of resins, including acrylic resin, epoxy resin, polyester resin and PU, which vary in physical features, chemical properties, weather fastness and corrosion resistance. Color functions to leave color on the film. Different ratios of color and resin will result changeable hardness, gloss and corrosion resistance of the formed film on decorative aluminum sheet.
As an important part of liquid painting, solvent evaporates in the later drying process. It’s also used to adjust viscosity of paintings, in which case it’s called thinner. The quality and ratio of solvent for paintings of decorative aluminum sheetplays an important part in production, storage, and coating of paintings, and formation and quality of painting film. Additives serve to improve a certain property of paintings used on decorative aluminum sheet. Only a slight amount of an additive leads to remarkable result. There are so many kinds of additives of various functions. One additive may help to improve properties of paintings and films. Another may shorten drying time, and a third one may prevents painting films from being destroyed etc. Haomei offers decorative aluminum sheet of various types. Welcome to contact us at april@aluminumhm.com, leave a message below or wechat/whatsapp 008615838029491 for more information.
Reprinted from https://www.7a7s.com/new/decorative-aluminium-sheet.html
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