The manufacturing process of EVA glass laminated films involves multiple steps such as EVA resin, cross-linking agents, silane coupling agents and other modifiers. Its use is mainly used as an adhesive in solar photovoltaic panel packaging.
The following is a detailed introduction of EVA glass gluing film:
Raw material preparation:EVA resin (ethylene-vinyl acetate copolymer) is the main raw material for preparing EVA film, and also requires the addition of additives and modifiers such as cross-linking agents and silane coupling agents. After these raw materials are evenly stirred in the mixer, they need to stand in a closed container for a period of time to eliminate bubbles and ensure the uniformity of the mixture.
Melt forming: The mixed material is placed on a film production line and formed into a molten film through flow extrusion. This step requires precise control of temperature and pressure to ensure that the thickness and uniformity of the film meet the requirements.
Laminated packaging:EVA adhesive film is one of the key packaging materials in the solar module production process and is used to fix and protect the crystalline silicon cells between the tempered glass and the back plate. During the lamination process, the EVA adhesive film will be encapsulated under a certain temperature and pressure to tightly bond the battery cell with the glass and back plate.
Quality control: In order to avoid material waste and environmental pollution and improve the production efficiency and quality of components, the production process requires very precise control. In past production, the size of EVA film and backsheet was larger than glass, which would lead to material waste and equipment pollution. The current practice is to cut accurately to reduce waste and reduce pollution of equipment and products.
Performance requirements: In addition to basic bonding and protective effects, EVA adhesive films also need to have good light transmittance to increase the incidence rate of light, thereby increasing the output power of solar modules.
Environmental impact: The current research direction may focus on how to improve its anti-PID performance by improving the formulation, because traditional EVA adhesive films have PID(potential induced attenuation) problems.
Production process: The entire production process includes raw material preparation, rubber mixing, rubber dipping, transfer, rubber pressing, cooling and cutting. Each step requires standardized operations to ensure that the final product meets application requirements.
Overall, EVA glass glue film is an important solar photovoltaic module packaging material. It not only protects and fixes the cells, but also affects the photoelectric conversion efficiency and long-term stability of the module.