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Halogen-free photovoltaic backing plate and preparation method thereof

A photovoltaic backplane and backplane technology, applied in the field of composite materials, can solve the problems of PET loss of mechanical properties and water vapor barrier properties, increase of PET brittleness, acceleration of water penetration, etc., to achieve environmental friendliness, strong mechanical properties, and good water resistance Effect

Inactive Publication Date: 2018-06-29
SHANGHAI HIUV NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the initial stage of humid heat aging, water is adsorbed on the surface of PET and penetrates slowly. Due to the etching and solvation of PET by water over time, the crystallinity of PET gradually increases, and the micropores and cracks on the surface increase. At the same time, PET The ester bond in the molecular chain is broken by the attack of water molecules, forming PET with a shorter molecular chain. Under the action of increasing water speed, the crystallinity further increases, the brittleness of PET increases, and the penetration of water into PET accelerates. The above process is repeated continuously, and finally Make PET lose its original mechanical properties and water vapor barrier properties

Method used

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  • Halogen-free photovoltaic backing plate and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] The blocking agent used in the present embodiment is an isocyanate oligomer, and the specific component contents of the first modified PET layer and the second modified PET layer are as follows:

[0034] 99% polyethylene terephthalate, 0.1% antioxidant, 0.1% light stabilizer, 0.2% isocyanate oligomer.

[0035] The white PET layer is prepared from ordinary polyethylene terephthalate blended with inorganic white fillers and heat stabilizers, and the inorganic white fillers are titanium dioxide or barium sulfate. In the present embodiment, the inorganic white filler is titanium dioxide, and the specific component content of the white PET layer is as follows:

[0036] 78% polyethylene terephthalate, 0.1% antioxidant, 0.1% light stabilizer, 22% titanium dioxide.

[0037] The preparation method of the halogen-free photovoltaic backplane comprises the following steps:

[0038] (1), the raw materials of the first modified PET layer, the second modified PET layer and the white...

Embodiment 2

[0045] The end-capping agent used in the present embodiment is oxazoline compound and carbodiimide, and the specific component content of the first modified PET layer and the second modified PET layer is as follows:

[0046] Polyethylene terephthalate 97%, antioxidant 0.1%, light stabilizer 0.1%, oxazoline compound 1%, carbodiimide 2%.

[0047] The preparation method of the white PET layer and the halogen-free photovoltaic backsheet is the same as that of Example 1.

[0048] In this embodiment, the thickness of the first modified PET layer is 40 microns, the thickness of the white PET layer is 240 microns, the thickness of the second modified PET layer is 40 microns, and the thickness of the first acrylate layer is 5 microns, The thickness of the second acrylate layer was 5 microns.

[0049] Compared with other products of the same type in China, the parameters of the product of the present invention are as follows:

[0050] performance

Embodiment 3

[0052] The end-blocking agent used in the present embodiment is carbodiimide and epoxy compound, and the specific component content of the first modified PET layer and the second modified PET layer is as follows:

[0053] 97% polyethylene terephthalate, 0.1% antioxidant, 0.1% light stabilizer, 3% carbodiimide, 0.02% epoxy compound.

[0054] The preparation method of the white PET layer and the halogen-free photovoltaic backsheet is the same as that of Example 1.

[0055] In this embodiment, the thickness of the first modified PET layer is 30 microns, the thickness of the white PET layer is 300 microns, the thickness of the second modified PET layer is 30 microns, and the thickness of the first acrylate layer is 4 microns, The thickness of the second acrylate layer was 4 microns.

[0056] Compared with other products of the same type in China, the parameters of the product of the present invention are as follows:

[0057] performance

[0058] The halogen-free photovol...

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Abstract

The invention relates to a halogen-free photovoltaic backing plate. The halogen-free photovoltaic backing plate is characterized in that the backing plate comprises a first acrylate layer, a first modified PET layer, a white PET layer, a second modified PET layer and a second acrylate layer in sequence; and the modified PET layer comprises the raw materials such as PET, a stabilizer and an end-capping reagent. The invention also provides a preparation method of the halogen-free photovoltaic backing plate. The halogen-free photovoltaic backing plate adopted in the invention comprises the hydrolysis-resistant modified PET layer, the halogen-free photovoltaic backing plate is high in mechanical performance and excellent in aging resistance; and compared with a traditional fluorine-containingbacking plate, the halogen-free photovoltaic backing plate is high in reflectivity, high in watertightness, environmentally-friendly and low in cost.

Description

technical field [0001] The present invention relates to the technical field of composite materials, in particular to a photovoltaic backplane, in particular to a halogen-free photovoltaic backplane. Background technique [0002] Solar backsheets are divided into two types: fluorine-containing backsheets and fluorine-free backsheets. Among them, the fluorine-containing backsheet is divided into double-sided fluorine-containing and one-side fluorine-containing two types; the fluorine-free backsheet is mostly bonded with PE, PET or its modified materials through an adhesive. At present, mainstream backsheets have a laminated structure, which is generally composed of several polymer materials, but this composite structure will cause waves on the coating surface of the prepared solar cell backsheet, and the adhesion between layers unstable. [0003] The solar backsheet is located on the back of the solar cell, which protects and supports the cell. It needs to have excellent lon...

Claims

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Application Information

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IPC IPC(8): B32B27/06B32B27/36B32B27/20B32B33/00H01L31/048H01L31/049
CPCY02E10/50B32B27/08B32B27/20B32B27/36B32B33/00B32B2250/03B32B2250/244B32B2255/10B32B2255/26B32B2307/416B32B2307/714B32B2307/73B32B2457/12H01L31/0481H01L31/049
Inventor 李民
Owner SHANGHAI HIUV NEW MATERIALS
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