High-gain grid adhesive film for photovoltaic module, composite EVA (Ethylene Vinyl Acetate) resin and production process thereof

Abstract

The invention belongs to the technical field of packaging adhesive films, and particularly relates to a high-gain grid adhesive film for a photovoltaic module, composite EVA resin and a production process of the composite EVA resin, and the high-gain grid adhesive film for the photovoltaic module comprises a base film, and the contact surface of the base film and a grid reflecting layer is an EVA adhesive film; wherein the melt index of the EVA adhesive film is 6 to 15 g / 10 min. According to the high-gain grid adhesive film for the photovoltaic module, various EVA resins with different melt indexes are mixed according to a ratio, so that the fluidity of the EVA resins is reduced, and meanwhile, the processing speed regulation is ensured, so that the fluidity of the adhesive film after crosslinking and irradiation curing is reduced, the grid adhesive film is prevented from flowing in the module laminating process, and a grid part after the photovoltaic module is laminated is enabled to be uniform and uniform. Especially, the edge grid reflecting layer is not easy to crack.

Description

technical field [0001] The invention belongs to the technical field of encapsulating adhesive films, and in particular relates to a high-gain grid adhesive film for photovoltaic components, a composite EVA resin and a production process thereof. Background technique [0002] High conversion efficiency and low manufacturing cost have always been the goals pursued by photovoltaic power generation. At present, due to the gaps between the cells in the photovoltaic module, the light irradiated there cannot be fully absorbed and utilized by the cells, resulting in energy loss, resulting in lower module efficiency than the cell efficiency. The white high-reflective backplane can use part of the light in the gap, and the white film on the back layer can also partially use the light in the gap, and the power gain is higher than that of the white backplane. The principle is to reflect the light at the gap to the front glass, and reflect or even total reflect at the interface between ...

AI Technical Summary

Problems solved by technology

When the grid adhesive film is applied to the package of the component, when it is laminated at high temperature, the base adhesive film is melted and flowed through high temperature, so that the strip reflective layer on the surface of the base adhesive film is easy to fall off, or deform, or migrate, so that it cannot correspond to The gap between the cells, so that the effect of reflecting light cannot be achieved, but it will also reflect the light that could have been irradiated to the cells, resulting in the inability to effectively increase the conversion efficiency.

[0005] Patent document CN202022009619U discloses a grid adhesive film and a photovoltaic module, which solves the problem that the reflective layer in the gap between the two cells is easy to fall off, deform, or migrate by pre-crosslinking. The problem that the reflective layer is prone to damage after the film is still not well resolved

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