Five-layer structure co-extruded solar battery backplane with PBT and manufacturing method thereof

Abstract

The invention discloses a five-layer structure co-extruded solar battery backplane with a PBT and a manufacturing method thereof and belongs to the technical field of a solar battery backplane. The solar battery backplane comprises an outer weathering layer, an outer bonding layer, a substrate layer, an inner bonding layer and an inner weathering layer, wherein the outer weathering layer and the substrate layer are fixed through the outer bonding layer, and the substrate layer and the inner weathering layer are fixed through the inner bonding layer. Layers of material are melted in different flow channels through employing the coextrusion process and directly extruded for molding, the operation process is simple, and the bonding layers are not easily separated. Through the manufacturing method, not only can the processing process be simplified, the manufactured backplane has excellent weatherability, mechanical performance and long-term stability, but also no organic solvent is utilized in the manufacturing process, and environmental protection is achieved.

Description

technical field [0001] The invention belongs to the field of solar cell backboards, and in particular relates to a PBT-containing five-layer structure co-extruded solar cell backboard and a preparation method thereof. Background technique [0002] In recent years, due to global environmental problems and the depletion of fossil fuels, solar energy has attracted widespread attention as a clean, pollution-free and most abundant renewable energy source. Solar cells are efficient devices that convert solar energy directly into electricity. Solar cells are exposed to long-term outdoor wind, rain, ultraviolet rays and other natural factors. The solar cell backsheet should use a backsheet with excellent weather resistance and durability, which is convenient for protecting the solar cell and prolonging its service life. [0003] At present, the mainstream solar cell backsheet in the market has a five-layer structure, the outer layer is made of fluorine-containing materials with exc...

AI Technical Summary

Problems solved by technology

[0004] The patent number of Ningbo Longyang Technology Co., Ltd. is Z201110380482.4, which discloses a solar cell backplane and its preparation method. The backplane uses PETG as a weather-resistant layer, PET as a structural reinforcement layer, and EVOH as a barrier layer for multi-layer co-extrusion. There is no need to use adhesives, but the weather resistance and environmental erosion resistance of PETG materials are far inferior to those of fluorine-containing materials. At the same time, without adhesives between layers, it is easy to fall off between layers after long-term use separation phenomenon