Multilayer super-weatherable transparent film, preparation method and application

By designing a multi-layer transparent film, including a top layer, an intermediate layer, and a bottom layer, the problem of insufficient UV blocking in outdoor use of ETFE transparent film is solved, achieving high efficiency in UV blocking and mechanical properties, and extending the service life of solar cell modules.

CN118269435BActive Publication Date: 2026-06-09HANGZHOU FUMO NEW MATERIAL TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HANGZHOU FUMO NEW MATERIAL TECH
Filing Date
2022-12-31
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing ETFE transparent films lack UV blocking properties during long-term outdoor use, leading to decreased adhesion and affecting the reliability and lifespan of solar cell modules.

Method used

The transparent film employs a multi-layer structure, including a top layer, an intermediate layer, and a bottom layer. The top layer contains UV absorbers and blocking agents, the intermediate layer is a blend of PVDF and ETFE, and the bottom layer is ETFE. It is prepared by melt co-extrusion process. The intermediate layer acts as an adhesive, the bottom layer provides mechanical properties, the top layer is away from the solar cell, and the bottom layer is close to the solar cell.

Benefits of technology

The film's UV blocking and mechanical properties were improved, extending the lifespan of solar cell modules, enhancing protection against ultraviolet radiation and wind and sand erosion, and increasing the power generation efficiency of the cells.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a super-weather-resistant transparent film prepared by co-extrusion of PVDF and ETFE, and the film structure is a surface layer, an intermediate layer and a bottom layer. The surface layer comprises 50-85 parts by weight of a PVDF homopolymer or copolymer, 10-45 parts by weight of a flow modifier, and 1-4 parts by weight of an antioxidant, a UV blocking agent / UV absorber; the intermediate layer is a blend of ETFE and PVDF; and the bottom layer is ETFE. The application further provides a preparation method and application of the super-weather-resistant transparent film. The co-extrusion film has a transmittance of greater than or equal to 85% for light with a wavelength of 380-1100 nm, and has the characteristics of super-weather resistance, super-toughness and high UV blocking.
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