PET film with two-layer structure and solar cell backboard comprising PET film
A solar cell and two-layer structure technology, which is applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of low reflectance affecting battery power generation efficiency, difficult component repair, low UV resistance, etc., and achieve low water vapor transmission rate , improve heat dissipation efficiency and light reflectivity, and have good long-term aging resistance
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Embodiment 1
[0030] The invention provides a PET film with a two-layer structure and a solar cell backboard composed of the PET film.
[0031] Such as figure 1 Shown is a schematic diagram of the structure of a PET film with a two-layer structure. The PET film 3 is formed by biaxial stretching and co-extrusion of two layers of PET film, an outer layer 1 and an inner layer 2; wherein, the thickness of the PET film 3 is 0.250mm, and the outer layer 1 The thickness is 0.050mm, and the thickness of the inner layer 2 is 0.200mm. The surface gloss of the outer layer 1 is 10, and the surface gloss of the inner layer 2 is 60, wherein the light projection angle for measuring the gloss is 60°, which meets the national standard GB / T9754-2007 and the international standard ISO2813:1994; the inner layer 2 The surface reflectance obtained by the integrating sphere method is 80%, and the light wavelength range for measuring reflectance is 400-1100nm;
[0032] The PET film 3 with the above-mentioned two...
Embodiment 2
[0039]A PET film with a two-layer structure and a solar cell back sheet composed of the PET film, the preparation method and structure of the PET film, the structure of the solar cell back sheet 10 composed of the PET film as the base layer, and the assembly structure of the back sheet 10 are the same as in Example 1.
[0040] In order to improve the ultraviolet shielding performance of the inner and outer layers, both the outer layer 1 and the inner layer 2 contain high refractive index inorganic filler TiO 2 , wherein the PET film 3 has a thickness of 0.050mm, the outer layer 1 has a thickness of 0.010mm, and the inner layer 2 has a thickness of 0.040mm. The surface gloss of the outer layer 1 is 60, and the surface gloss of the inner layer 2 is 60, wherein the light projection angle for measuring the gloss is 60°, which conforms to the national standard GB / T9754-2007 and the international standard ISO2813:1994; the inner layer 2 The surface reflectance obtained by the integr...
Embodiment 3
[0046] In this example, the preparation method and structure of the PET film with a two-layer structure, the structure of the solar battery back sheet 10 composed of the PET film as the base layer, and the assembly structure of the back sheet 10 are the same as those in Embodiment 1.
[0047] In order to improve the ultraviolet shielding performance of the outer layer 1, it can add high refractive index inorganic filler TiO 2 , the thickness of the PET film 3 is 1.000mm, the thickness of the outer layer 1 is 0.020mm, and the thickness of the inner layer 2 is 0.980mm. The surface gloss of the outer layer 1 is 99, and the surface gloss of the inner layer 2 is 10, wherein the light projection angle for measuring the gloss is 60°, which conforms to the national standard GB / T9754-2007 and the international standard ISO2813:1994; the inner layer 2 The surface reflectance obtained by the integrating sphere method is 30%, wherein the light wavelength range for measuring the reflectanc...
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Abstract
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