Solar EVA film, namely solar cell packaging film (EVA) is a thermosetting adhesive film used in the middle of laminated glass (EVA is Ethylene vinyl Vinyl vinyl Acetate acetate). Due to the advantages of EVA film in adhesion, durability and optical characteristics, it is more and more widely used in current components and various optical products.1. The advantages of solar cell packaging film (EVA) are summarized as follows: 1. High transparency, high adhesion can be applied to a variety of interfaces, including glass, metal and plastic such as PET.2, good durability can resist high temperature, moisture, ultraviolet light and so on.3. Easy to store. Storage at room temperature, the adhesion force of EVA is not affected by the humidity and the absorbent film.4, compared with PVB has a stronger sound insulation effect, especially high frequency sound effect 5, low melting point, easy to flow, can be applied to a variety of glass lamination process, such as embossed glass, tempered glass, curved glass and so on.2. Special reason: make sandwich glass with EVA film, Fully comply with the national standard for laminated glass, GB9962-99, Take the 0.38mm thick transparent film as an example below, The performance indicators are as follows: project index project index tensile strength (MPa) 17 visible light transmission rate (%) 87 fracture elongation (%) 650 fog rate (%) 0.6 bonding strength (kg / cm) 2 irradiation resistance qualified water absorption rate (%) 0.15 qualified heat resistance impact resistance qualified bag impact performance 98.5% 3, processing method: make glass in vacuum bag, Vacuum degree of 700mmHg(0.092Mpa), Temperature is 100-110℃ (the actual temperature of the glass surface), Keep it warm for 10 minutes, Cool to below 60℃, remove cargo or freight vacuum.4. Storage time and conditions When storing them in the original packaging do not take out, put them in the light and ventilated place, and the temperature does not exceed 30℃, humidity is lower than 80%.5. Product specification: Thickness: 0.25mm,0.38mm Width: 2.1m 6, the product color is diverse (transparent, opaque and color), available for choice. In recent years, EVA film has been controlled by foreign giant companies including DuPont. Authoritative data shows that the production of EVA film in China can only meet part of the demand of photovoltaic module manufacturers, and there is a large gap in the domestic market. In the international market, high-quality EVA film is in short supply, and EVA film once became a bottleneck restricting the production of component factories. With the enhancement of independent research and development production capacity, domestic products gradually show, such as Hangzhou Suokangbo, Zhejiang Institute of Foster, Guangzhou Lushan and Chinese Academy of Sciences.