A kind of solar battery backplane and production process

Abstract

The invention relates to a solar battery backboard and a production technology thereof; the backboard is successively composed of a weather-proof layer, a bonding layer, an insulating layer and a coating layer from top to bottom; the weather-proof layer is a polyvinylidene fluoride film and a polyvinyl fluoride film and has the thickness of 20 to 35 [mu]m; the bonding layer is formed by mixing one or more of a polyurethane adhesive, an organosilicone adhesive, a polymer hot melt adhesive and an epoxy resin adhesive and has the thickness of 5 to 10 [mu]m; the insulating layer is a polyethylene terephthalate thin film and has the thickness of 50 to 250 [mu]m; the coating layer is a modified polyethylene thin film composited on the insulating layer by a film coating method and has the thickness of 30 to 100 [mu]m, wherein the modified polyethylene thin film is composed of 2-5 parts of a modified polyethylene masterbatch and 4-10 parts of polyethylene resin. With adopting of the film coating process, two processes of bonding layer (the PE film or the PEVA film) electric corona and substrate PET gluing are omitted in the production process, the processes are simplified, and moreover, investment of labor, equipment and raw material costs is reduced.

Description

Technical field: [0001] The invention relates to a packaging material for a photovoltaic module, in particular to a solar cell backboard and a production process. Background technique: [0002] Today, as fossil fuels are decreasing day by day, solar energy, as a safe and environmentally friendly renewable energy source, has become an important part of energy used by human beings and has been continuously developed. [0003] The solar cell backsheet is located on the back of the solar cell panel, which protects and supports the cells, and requires certain insulation, water resistance, and aging resistance. At present, the two mainstream types of backsheets are composite backsheets (such as TPT, KPK and KPE, etc.) High production costs and other issues. Invention content: [0004] In order to solve the above problems, the present invention provides a technical solution with only four-layer structure, which reduces the use of one layer of polyurethane glue and reduces the p...

AI Technical Summary

Problems solved by technology

At present, the two mainstream types of backsheets are composite backsheets (such as TPT, KPK and KPE, etc.) high production costs