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Fluorocarbon coating, fluorocarbon coating liquid and transparent solar backboard

A technology of fluorocarbon coating and coating liquid, which is applied in the field of solar backplanes, can solve the problems of high water vapor transmission rate, achieve the effects of reducing water permeability index, meeting packaging strength and improving weather resistance

Active Publication Date: 2022-06-24
NINGBO EXCITON NEW ENERGY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of high water vapor transmission rate of the existing transparent solar back sheet, the present invention provides a transparent solar back sheet

Method used

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  • Fluorocarbon coating, fluorocarbon coating liquid and transparent solar backboard
  • Fluorocarbon coating, fluorocarbon coating liquid and transparent solar backboard
  • Fluorocarbon coating, fluorocarbon coating liquid and transparent solar backboard

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Experimental program
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Effect test

preparation example Construction

[0066] The preparation method of the solar back sheet film provided by the present invention comprises the following steps:

[0067] (1) Coat the white coating liquid on the surface of transparent PO by grid printing, and place it in a circulating oven for curing to form a white fluorocarbon layer; (2) Coat an adhesive layer on the PET surface and place it in a circulating oven Heat curing treatment, pasting transparent PO film to obtain semi-finished product; (3) Coating adhesive on the other side of semi-finished product substrate to form an adhesive layer, placing the adhesive layer in a circulating oven for drying treatment, and then compounding the fluorine film layer; (4) Aging reaction of the finished solar back sheet; (5) Laminating the solar back sheet with EVA to simulate and test the encapsulation strength.

[0068] Further, in the process (1), the drying temperature of the circulating oven for the treatment of the white fluorocarbon layer is 80° C., and the time is...

Embodiment 1

[0083] The preparation method of the fluorocarbon coating solution provided in this embodiment includes:

[0084] 36% PTFE type fluorocarbon resin, 23.6% titanium dioxide, 2% matting powder, 33% thermoplastic polyurethane, 0.4% polyacrylate additive, 5% isocyanate. The host resin was dispersed in an organic solvent to form a fluorocarbon coating liquid with a solid content of 50%. Among them, the PTFE type fluorocarbon resin is provided by Daikin Fluorochemical, the titanium dioxide is provided by DuPont, the thermoplastic polyurethane is provided by Croda Chemical, the matting powder is provided by Grace Co., Ltd., and the polyacrylate is provided by BYK , the isocyanate is provided by Bayer, and the organic solvent is butyl acetate.

[0085] The coating was applied on the preform transparent PO with a thickness of 50 μm for PO and a thickness of 250 μm for PET on the backsheet.

[0086] The thickness of the white fluorocarbon layer formed was 17 μm.

[0087] The performan...

Embodiment 2

[0089] The preparation method of the fluorocarbon coating solution provided in this embodiment includes:

[0090] 25% PTFE type fluorocarbon resin, 25% titanium dioxide, 3% matting powder, 40% thermoplastic polyurethane, 0.4% polyacrylate additive, 6.6% isocyanate. The host resin was dispersed in an organic solvent to form a fluorocarbon coating liquid with a solid content of 60%. Among them, the PTFE type fluorocarbon resin is provided by Daikin Fluorochemical, the titanium dioxide is provided by DuPont, the thermoplastic polyurethane is provided by Croda Chemical, the matting powder is provided by Grace Co., Ltd., and the polyacrylate is provided by BYK , the isocyanate is provided by Bayer, and the organic solvent is butyl acetate.

[0091] The coating was applied on the preform transparent PO with a thickness of 150 μm for PO and a thickness of 188 μm for PET on the backsheet.

[0092] The thickness of the white fluorocarbon layer formed was 14 μm.

[0093] The performa...

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Abstract

The invention relates to the technical field of solar back panels, in particular to a fluorocarbon coating, fluorocarbon coating liquid and a transparent solar back panel. In order to solve the problem that an existing transparent solar backboard is high in water vapor permeability, the invention provides the transparent solar backboard. The fluorocarbon coating comprises the following components in percentage by weight: 20%-40% of fluorocarbon resin, 20%-40% of titanium dioxide, 2%-5% of matting powder, 0.3%-0.6% of an additive, 30%-50% of an adhesion promoter and 5%-8% of isocyanate. The transparent solar backboard sequentially comprises a white grid fluorocarbon coating, a transparent PO film, a first adhesive layer, a base material, a second adhesive layer and a fluorine film layer from top to bottom. According to the transparent solar backboard provided by the invention, the water permeability index of the whole backboard can be effectively reduced.

Description

Technical field [0001] The present invention relates to the technical field of solar backsheets. Specifically, it relates to a fluorocarbon coating, a fluorocarbon coating liquid, and a transparent solar backsheet. Background technique [0002] Bifacial power generation cells have been widely developed and applied in the photovoltaic field. At present, because the back side of bifacial solar cells also needs to generate electricity, the performance requirements for the water vapor transmission rate (referred to as water permeability) on the back side are gradually increasing. Generally, transparent backsheets use transparent fluorocarbon coating as the inner layer. Although the weather resistance is guaranteed, due to the poor water resistance of the coating itself, some cells with high water permeability requirements are still inferior to the module structure with glass on the back. [0003] In order to solve the current low water permeability problem of traditional transp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/18C09D7/65C09D7/61C09D5/33H01L31/049
CPCC09D127/18C09D7/65C09D7/61C09D5/004H01L31/049C08K2003/2241C08L2201/08C08L2203/204C08L2205/03C08L33/04C08L75/04C08K3/36C08K3/22
Inventor 汪诚简伟任王超邓文晖袁南园唐海江李刚张彦
Owner NINGBO EXCITON NEW ENERGY CO LTD
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