A kind of polyethylene film for solar cell with high thermal stability

Abstract

The invention discloses a polyethylene film with high heat stability for solar cells. The polyethylene film comprises, by weight, 5-20 parts of polyethylene modifiers, 80-100 parts of polyethylene film color master batch and 15-30 parts of functional agent color master batch. The polyethylene film with the high heat stability for the solar cells has the advantages that the polyethylene film is excellent in physical property, the tensile strength of the polyethylene film is higher than or equal to 30 MPa, and the breaking elongation of the polyethylene film is higher than or equal to 500%; the polyethylene film is high in heat stability and good in heat deformation resistance, the heat deformation rate of the polyethylene film at the temperature of 150 DEG C is lower than 25%, and the polyethylene film can be applied to back plates of the solar cells, so that stress effects of the back plates on cell pieces can be relieved, and risks of forming micro-crack in the cell pieces can be effectively reduced.

Description

Technical field: [0001] The invention relates to a polyethylene film for solar cells with high thermal stability, belonging to the field of polymer materials. Background technique: [0002] Photovoltaic backsheet is an extremely important packaging material in solar cell modules. It not only undertakes the important mission of ensuring the safe and stable power generation of modules for 25 years, but also is an important link in reducing the cost of photovoltaic power generation. The development of high-performance and low-cost photovoltaic backsheets is crucial to promoting photovoltaic It is of great significance to generate electricity at parity. In recent years, the use of cheap polyethylene film instead of fluorine film as the inner film of the photovoltaic backplane has effectively reduced the manufacturing cost of the photovoltaic backplane, but the polyethylene film has exposed heat resistance, ultraviolet resistance, Due to the lack of heat dissipation, the prepara...

AI Technical Summary

Problems solved by technology

In recent years, the use of cheap polyethylene film instead of fluorine film as the inner film of the photovoltaic backplane has effectively reduced the manufacturing cost of the photovoltaic backplane, but the polyethylene film has exposed heat resistance, ultraviolet resistance, Insufficient heat dissipation, the preparation of low-cost and high-reliability polyethylene film is a hot research topic in the field of photovoltaic auxiliary materials

[0003] Thermal stability is an important indicator to measure the reliability of photovoltaic backplanes. Insufficient thermal stability of the polyethylene film on the inner layer of photovoltaic backplanes will cause delamination and blistering of the backplane during high-temperature operation. At the same time, high temperature will cause polyethylene The film is deformed, and the stress generated by the deformation can cause micro-cracks in the cell, increasing the risk of snail marks