do you understand eva solar photovoltaic film technology?

eva solar photovoltaic film is a film made of eva (ethylene-vinyl acetate copolymer) resin as the main raw material, by adding appropriate cross-linking agents, anti-aging additives, etc., through melt extrusion, and using the salivation method. it has the characteristics of high light transmittance, resistance to uv yellowing due to moisture and heat, and good adhesion to glass and backsheets. it protects the cells and allows sunlight to penetrate the film to the maximum extent and reach the cells.

eva solar photovoltaic films are photovoltaic components such as crystalline silicon cells and thin film battery modules. the packaging process of photovoltaic modules is irreversible. the operating life of the battery module is required to be more than 25 years. once the adhesive film and backsheet of the battery module begin to turn yellow and turn turtle if it cracks, the battery will easily fail and be scrapped. , so although the absolute value of film materials such as eva film and backsheet is not high (about 70 to 80% of the production cost of crystalline silicon battery modules comes from the cells, and about 3 to 7% comes from eva film and backsheet), however, it is a key factor that determines the quality and life of photovoltaic module products.