| abstract |
The invention discloses a weather-resistant solar cell backplane base film, which is characterized in that: it is composed of an ultraviolet-resistant functional resin layer and a hydrolysis-resistant polyester resin layer; the preparation method is: preparing an organic ultraviolet PET functional masterbatch, preparing a hydrolysis-resistant PET Functional masterbatch, preparation of PET chain extender functional masterbatch, extrusion of UV-resistant functional resin, extrusion of hydrolysis-resistant polyester resin, extrusion of the extruded material through the distribution block co-extrusion into a cast sheet, biaxially stretched After shaping and cooling, the weather-resistant solar cell backplane base film is prepared. By adopting the invention, the chemical reaction between the PET chain extender and the PET polyester of the UV-resistant polyester resin layer and the hydrolysis-resistant polyester resin layer can effectively solve the problem that the base film of the weather-resistant solar cell backplane is changed due to environmental temperature changes during long-term outdoor use. And the problem of delamination of the UV-resistant layer and the hydrolysis-resistant layer caused by UV irradiation, the obtained weather-resistant solar cell back sheet base film has good performance and is suitable for the manufacture of solar photovoltaic cell back sheet materials. |