Coating liquid for fluorocarbon coating layer and solar back plate using coating layer

A technology of solar backplane and fluorocarbon coating, which is applied in the field of solar backplane to achieve high packaging strength, meet the requirements of outdoor aging test, and meet the effect of aging performance test

Active Publication Date: 2019-08-20
安徽激智科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most existing patents do not focus on the inner fluorocarbon layer and EVA packaging strength.

Method used

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  • Coating liquid for fluorocarbon coating layer and solar back plate using coating layer
  • Coating liquid for fluorocarbon coating layer and solar back plate using coating layer
  • Coating liquid for fluorocarbon coating layer and solar back plate using coating layer

Examples

Experimental program
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Effect test

preparation example Construction

[0068] The preparation method of the solar backplane film provided by the invention comprises the following steps:

[0069] (1) Coating the fluorocarbon layer coating solution on the surface of the substrate, placing it in a circulation oven for curing to form a fluorocarbon layer; (2) coating the other side of the semi-finished substrate coated with the fluorocarbon layer with an adhesive layer, The adhesive layer is placed in a circulating oven for drying treatment, and then compounded with a fluorine film layer; (3) curing the finished solar backplane; (4) laminating the solar backplane with EVA to prepare a simulation test for packaging strength.

[0070] Further, (1) in the process, the temperature of the circulating oven drying of the fluorocarbon layer treatment is 150° C., and the time is 2 minutes;

[0071] Further, (2) the temperature of the circulating oven for drying the process adhesive is 90° C., and the time is 2 minutes;

[0072] Further, the aging treatment t...

Embodiment 1

[0084] The preparation method of the fluorocarbon coating solution provided in this embodiment includes:

[0085] 40% polytetrafluoroethylene type fluorocarbon resin, 40% rutile titanium dioxide, 5% silica matting powder, 0.4% polyacrylate additive, 5% thermoplastic polyurethane resin (adhesion promoting resin), 9.6% isocyanate curing agent. Disperse the above raw materials (including resin, matting powder, titanium dioxide, etc.) in an organic solvent to form a fluorocarbon coating solution with a solid content of 48%. Among them, polytetrafluoroethylene type fluorocarbon resin is provided by Daikin Fluorochemical Co., Ltd., titanium dioxide is provided by DuPont, matting agent is provided by Grace Co., Ltd., polyacrylate is provided by BYK Chemicals, and thermoplastic polyurethane resin is provided by Croda Chemicals. The isocyanate was provided by Bayer, and the organic solvent was butyl acetate.

[0086] The coating solution was applied on a 250 μm PET substrate.

[008...

Embodiment 2

[0090] The preparation method of the fluorocarbon coating solution provided in this embodiment includes:

[0091] 57% polytetrafluoroethylene type fluorocarbon resin, 30% rutile type titanium dioxide, 2% silica matting powder, 0.5% polyacrylate additive, 3% thermoplastic polyurethane resin, 7.5% isocyanate. The above raw materials are dispersed in an organic solvent to form a fluorocarbon coating solution with a solid content of 50%. Among them, polytetrafluoroethylene type fluorocarbon resin is provided by Daikin Fluorochemical Co., Ltd., titanium dioxide is provided by DuPont Company, matting agent is provided by Grace Co., Ltd., polyacrylate is provided by BYK Chemicals, and thermoplastic polyurethane resin is provided by Croda Chemicals. The isocyanate was provided by Bayer, and the organic solvent was butyl acetate.

[0092] Coatings were applied on 275 μm PET substrates.

[0093] The thickness of the fluorocarbon coating formed after drying and curing is 16 μm.

[009...

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Abstract

The invention relates to the technical field of solar back plates, and in particular relates to a coating liquid for a fluorocarbon coating layer and a solar back plate using the coating layer. In order to improve encapsulation strength of a fluorocarbon coating layer of a current solar back plate, the invention provides the coating liquid for the fluorocarbon coating layer and the solar back plate using the coating layer. The coating liquid for the fluorocarbon coating layer comprises the following components, in percentages by weight: 40%-70% of fluorocarbon resin, 20%-40% of titanium dioxide, 1%-5% of extinction powder, 0.2%-0.8% of polyacrylate, 1%-5% of adhesion promoting resin, and 3%-10% of isocyanate, wherein the solid content is controlled at 40%-60%. The coating liquid provided by the invention forms the highly-dense fluorocarbon coating layer on the surface of a PET substrate, and the fluorocarbon coating layer can exhibit excellent encapsulation strength during lamination with EVA and remains to keep the high encapsulation strength after undergoing a damp heat aging test.

Description

technical field [0001] The invention relates to the technical field of solar backboards, in particular to a fluorocarbon coating liquid and a solar backboard using the coating. Background technique [0002] In the photovoltaic cell (solar cell) module, the back sheet is used as an auxiliary packaging material, and its performance plays a vital role in the outdoor use of the module. In the process of manufacturing devices, there will be a lamination process to complete the backplane, battery sheet, and glass packaging. The bonding between the back sheet and the battery sheet is mainly completed by the ethylene-vinyl acetate copolymer (EVA layer) in the middle. The packaging strength of the backplane and EVA is very important for the outdoor use of the module. It is generally believed that the inner layer material needs to use membrane materials, such as PE materials, to achieve high packaging strength. [0003] Fluorocarbon coating is used as the inner layer of the backshe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/12C09D127/18C09D7/61C09D7/65H01L31/049
CPCC08K2003/2241C08L2203/204C09D127/12C09D127/18C09D7/61C09D7/65H01L31/049C08L75/04C08L33/04C08K3/22Y02E10/50
Inventor 唐海江简伟任汪诚邓文辉薛永富夏寅李刚张彦
Owner 安徽激智科技有限公司
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