In the field of coated metal sheets, traditional prepainted steel sheets have long held a core position. As an emerging force in this category, electrostatic powder coated sheets share the inherent properties of metal substrates with their traditional counterparts, while forming differentiated and complementary advantages in surface treatment processes and performance characteristics. Together, they have become preferred materials for scenarios such as building facades, home appliance casings, and transportation facilities. Clarifying the relationship between the two is of great significance for accurately matching application needs and optimizing material selection decisions!
In essence, both traditional prepainted steel sheets and electrostatic powder coated sheets belong to the composite structure of "metal substrate + surface coating". Their core value lies in surface treatment technology, which enhances the corrosion resistance, decorativeness and service life of metal materials, addressing the pain points of bare metal such as easy oxidation and wear. Both are mainly based on metal sheets like aluminum-magnesium-manganese sheets, galvanized sheets and stainless steel sheets as substrates. The material and thickness of the substrate directly determine the mechanical strength and basic performance of the sheet, which is the common foundation for both to realize their functional value!
The core differences between the two lie in their surface coating processes and coating properties: Traditional prepainted steel sheets adopt the "continuous roll coating process", where solvent-based coatings are evenly applied to the surface of metal substrates via coating rolls and then cured at high temperatures to form a coating film. In contrast, electrostatic powder coated sheets use the "electrostatic powder spraying process", where solid powder is adhered to the substrate surface through electrostatic adsorption, followed by high-temperature melting and curing to form a film!
