Three-layer co-extrusion easy-to-bond solar backboard and preparation method thereof
A solar backplane film, three-layer co-extrusion technology, applied in chemical instruments and methods, layered products, flat products, etc., can solve problems such as complex solar backplane technology, achieve high reflectivity and UV resistance The effect of good junction and high reflectivity
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[0044] The preparation method of the solar backboard film provided by the invention comprises the following steps:
[0045] (1) Granulation: Mix polyester resin, nano-inorganic fillers, and incompatible resins evenly and carry out twin-screw mixing and granulation to obtain polyester functional masterbatch;
[0046] (2) Cast sheet: a three-layer co-extrusion process is adopted; the polyester resin and the polyester functional masterbatch obtained in step (1) are mixed according to the proportion, and then three extruders are used to carry out ABC three-layer co-extrusion melt plasticization, cast cast sheet;
[0047] (3) Stretching to form a film: longitudinally stretching, transversely stretching, heat-setting, winding and packaging the cast sheet obtained in step (2) to obtain the solar backboard film.
[0048] The polyester resin used in the examples is the PET polyester chip of Sinopec, and the particle size of the nano-inorganic particles is 0.1-8.0 μm.
[0049] The sol...
Embodiment 1
[0054] In the solar backboard film provided by the present invention, the A layer of the backboard film includes: 98% of PET resin, 1% of silicon dioxide, and 1% of anti-UV agent; the B layer includes: 70% of PET resin, 5% of nano-titanium dioxide, PP resin 25%; C layer includes PET resin 94%, ethylene-vinyl acetate copolymer 5%, silicon dioxide 1%. The backboard film is an ABC three-layer co-extrusion structure, and the total thickness of the backboard film is 0.125mm, wherein, the thickness of the A layer accounts for 7% of the total thickness, the thickness of the B layer accounts for 86% of the total thickness, and the C layer The thickness accounts for 7% of the total thickness. The relevant properties are shown in Table 1. The total thickness of the backsheet film is 0.250mm, wherein the thickness of layer A accounts for 7% of the total thickness, the thickness of layer B accounts for 86% of the total thickness, and the thickness of layer C accounts for 7% of the total ...
Embodiment 2
[0056] The solar backboard film provided by the present invention, the A layer of the backboard film includes: 94% of PET resin, 5% of silicon dioxide, and 1% of anti-UV agent; the B layer includes: 50% of PET resin, 50% of PP resin; Layer C includes 91% of PET resin, 8% of ethylene-vinyl acetate copolymer, and 1% of silicon dioxide. The backboard film is an ABC three-layer co-extrusion structure, and the total thickness of the backboard film is 0.125mm, wherein, the thickness of the A layer accounts for 7% of the total thickness, the thickness of the B layer accounts for 86% of the total thickness, and the C layer The thickness accounts for 7% of the total thickness. The relevant properties are shown in Table 1. The total thickness of the backsheet film is 0.250mm, wherein the thickness of layer A accounts for 7% of the total thickness, the thickness of layer B accounts for 86% of the total thickness, and the thickness of layer C accounts for 7% of the total thickness. The ...
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Abstract
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