High and low temperature resistant long-life solar photovoltaic backboard and preparation process thereof

Abstract

A high and low temperature resistant long-life solar photovoltaic backboard at least comprises an outer layer and an inner layer connected with the outer layer from top to bottom, wherein the preparation raw materials of the outer layer at least comprise, by weight, 20-80 parts of first polyolefin and 1-10 parts of water-insoluble solid inorganic matter, and the preparation raw materials of the inner layer at least comprise, by weight, 20-80 parts of second polyolefin; the outer layer and the inner layer are integrally formed through a co-extrusion technology and fusion, so that the overall firmness and stability of the solar photovoltaic back plate are improved, the solar photovoltaic back plate does not have the risks of cracking and delaminating even if the solar photovoltaic back plate is in an external cracking environment for a long time, and the service life of the solar photovoltaic back plate is prolonged. With the polyolefins as a main raw material, so that the environmental protection property of the solar photovoltaic backboard is improved, and the production concept of green development is compounded. By adding the solid inorganic matter in the outer layer of the solar photovoltaic backboard, the high and low temperature resistance and wear resistance of the solar photovoltaic backboard are improved, and the service life of the solar photovoltaic backboard is prolonged.

Description

technical field [0001] The invention belongs to the technical field of solar photovoltaics, and in particular relates to a high-low temperature resistant and long-life solar photovoltaic backplane and a preparation process thereof. Background technique [0002] With the development of science and technology, people pay more attention to the development and utilization of solar energy. As the most important form of utilization of solar energy, solar photovoltaic cells have also developed rapidly in recent years. The solar backsheet is located on the back of the solar panel, which protects and supports the solar panels. [0003] The initial solar backsheet has a three-layer structure, the outer protective layer PVDF has good environmental erosion resistance, the middle layer is PET polyester film with good insulation performance, and the inner layer PVDF and EVA have good bonding performance, but PVDF material The protective layer has a certain impact on the environment. Pa...

AI Technical Summary

Problems solved by technology

[0003] The initial solar backsheet has a three-layer structure, the outer protective layer PVDF has good environmental erosion resistance, the middle layer is PET polyester film with good insulation performance, and the inner layer PVDF and EVA have good bonding performance, but PVDF material The protective layer has a certain impact on the environment

Patent application number 201922045249.5 discloses a high and low temperature resistant long-life solar photovoltaic backsheet, the backsheet includes a PET substrate layer, a heat dissipation film is bonded to the surface of the PET substrate layer, and the bottom of the PET substrate layer is connected to There is a metal plate, and the surface of the metal plate is bonded with a waterproof layer. The waterproof layer includes a hydrophobic film a, a breathable film and a hydrophobic film b. The solar photovoltaic backplane in this technical solution is connected by multiple layered structures, which is not conducive to solar Photovoltaic backsheets have been used in an outdoor harsh environment for a long time, and cracks are prone to occur between layers, which is not conducive to the high and low temperature resistance of solar photovoltaic backsheets. Moreover, the manufacturing process of this solar photovoltaic backsheet is complicated, which is not conducive to production and processing.

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