A kind of back film of high barrier solar panel and preparation method thereof

Abstract

The invention provides a high-resistance solar panel back membrane and a preparation method of the high-resistance solar panel back membrane, and relates to the technical field of solar panel back membranes. The high-resistance solar panel back membrane is a three-layer composite membrane structure including an inner layer, an outer layer and a middle layer, wherein the outer layer is a weather-proof layer, the middle layer is a PET layer, the inner layer is an adhesive layer, the outer layer is connected with the middle layer through an adhesive, and the middle layer and the inner layer are connected through an adhesive; the outer layer weather-proof layer comprises, by weight parts, 25-45 parts of ethylene-vinyl alcohol, 15-35 parts of nylon, 10-16 parts of organic silicon resin, 2-5 parts of triethyl phosphate, 3-8 parts of a silane coupling agent, 1-4 parts of aramid fiber, 5-10 parts of a curing agent and 15-25 parts of a solvent. The high-resistance solar panel back membrane is good in weather resistance and corrosion resistance and quite good in gas and water barrier property; the materials are easy to machine and form, the preparation process is simple, the cost is low, and the high-resistance solar panel back membrane is ideal.

Description

technical field [0001] The invention belongs to the technical field of solar back film, and in particular relates to a high-barrier solar cell panel back film and a preparation method thereof. Background technique [0002] The back film of solar panels is one of the packaging materials for solar cell modules. Its main performance is to encapsulate crystalline silicon. In addition to excellent electrical insulation properties, anti-oxidation, anti-humidity and long-term prevention of hydrolysis of adhesives, etc., It should also have high barrier properties. [0003] The barrier performance of the back film includes not only the barrier of water vapor, but also the barrier of gas. Once air and water vapor enter the interior of the solar cell module, it will corrode the corresponding component very quickly and cause damage to the solar panel. Therefore, the barrier performance of the back film Also crucial. [0004] Existing solar panel back film barrier materials are genera...

AI Technical Summary

Problems solved by technology

[0006] It can be seen from this that the material used as a barrier in this technical solution is aluminum foil, and the aluminum foil is bonded to the substrate film to achieve the barrier effect by using the high density of the aluminum foil. However, the aluminum foil is bonded to the substrate through bonding. The adhesion is small, and it is prone to blistering. Secondly, the aluminum foil is eroded by air and moisture, and cracks and small holes will appear, thus losing its barrier performance. Therefore, the barrier performance of the back film provided by this solution is not stable. Not good for long-term use