Preparation method of polyvinylidene fluoride-based thin film

Abstract

The invention relates to a preparation method of a polyvinylidene fluoride (PVDF)-based thin film. According to the thin film forming process, through an extrusion casting and drawing method, PVDF, polymethyl methacrylate (PMMA), a rubber elastomer, titanium dioxide as well as other auxiliaries and fillers are mixed according to a certain ratio and are melted and extruded at certain temperature, and then the PVDF-based thin film is formed under guiding and stretching effects of casting traction equipment. The PVDF-based thin film prepared by the invention is uniform and easily controllable in thickness, good in barrier property as well as excellent in mechanical property and environmental aging resistance, and is easy to realize industrialization; the PVDF-based thin film, through modification treatment, is significantly improved in surface caking property and guarantees good adhesion with a solar cell packaging material; the thin film brings high convenience for assembly of a solar cell backboard film and is compact in structure; and the thin film has good application prospect in solar cell industry.

Description

technical field [0001] The invention relates to the field of polymer material processing, in particular to a preparation method of a polyvinylidene fluoride-based film, which is applied to a back plate protective film material in the solar cell industry. Background technique [0002] With the gradual depletion of non-renewable energy and various environmental pollution problems caused by the production and use of mineral resources, countries are using policy and legal means to gradually increase the development and utilization of renewable energy and clean energy, and strive to Increase its share in overall energy use. Among these clean and renewable energy sources, solar energy is one of the most important energy sources. In recent years, the governments of various countries have increased investment in the solar photovoltaic industry in terms of capital, technology and policies, and have taken the development of the solar photovoltaic industry as one of the strategic goal...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of the above-mentioned fluorine-containing films such as poor performance or high cost, and provide a method for preparing a PVDF-based film with simple procedures, good overall performance and low cost. Uniformity, good adhesion, excellent aging resistance, etc.

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