Backsheet for eco-friendly photovoltaic cell module and method for manufacturing same

A photovoltaic module and backplane technology, applied in the direction of photovoltaic power generation, chemical instruments and methods, applications, etc., can solve the problems of poor bonding strength of substrates, increased raw material costs, and non-environmental protection, so as to improve productivity and product quality, and reduce explosions and fire risk, the effect of a simple method

Active Publication Date: 2015-02-04
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the conventional methods have problems in that when the back sheet is processed in the form of a film, the adhesive strength to the substrate is poor, and when the back sheet is processed by coating, an organic solvent is used, resulting in an increase in raw material cost, which It is also not environmentally friendly

Method used

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  • Backsheet for eco-friendly photovoltaic cell module and method for manufacturing same
  • Backsheet for eco-friendly photovoltaic cell module and method for manufacturing same
  • Backsheet for eco-friendly photovoltaic cell module and method for manufacturing same

Examples

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preparation example Construction

[0038] The water-dispersed composition for preparing the fluororesin layer by an in-line coating process during the preparation of the substrate may contain a crystalline fluoropolymer, a pigment, a water-dispersed binder, and water.

[0039] In the water dispersion composition, the fluoropolymer may function to improve durability and weather resistance. In an exemplary embodiment of the present application, when the water dispersion composition is used to form a fluororesin layer, a crystalline fluoropolymer is used instead of a non-crystalline fluoropolymer. This is because, in non-crystalline fluoropolymers, urethane bonds are formed by reacting with curing agents and provide good initial bond strength, but may be hydrolyzed under conditions of high temperature and high humidity, resulting in less Crystalline fluoropolymers have low bonding reliability.

[0040] The crystalline fluoropolymer may have a crystallinity of 55% or less, 50% or less, 10% to 55%, or 10% to 50%. ...

Embodiment 1

[0112] Preparation of Water Dispersion Compositions

[0113] 20g of acrylate-modified polyester resin (polyethylene terephthalate (PET), glycidyl methacrylate (GMA) in molar ratio=1:0.5:1:0.2 ), in the form of an aqueous dispersion of a copolymer of methyl methacrylate (MMA) and methacrylic acid (MAA), Na + Used as the counter ion of MAA in aqueous dispersion, solid content: 30%), 5 g of acrylate copolymer containing oxazoline groups (WS-500, solid content: 40%) as crosslinking agent, Nippon Shokubai Co., Ltd.) and 50 g of titanium dioxide (Tipure TS6200, DuPont) as a pigment were added to 500 g of polyvinylidene fluoride resin (solid content: 20%) dispersed in water as an emulsion, and dispersed using a stirrer to prepare a water dispersion combination.

[0114] Preparation of backsheets for photovoltaic modules

[0115] Unoriented polyethylene terephthalate having a thickness of 2500 μm was obtained from melt-extruded polyethylene terephthalate after injecting fully dried...

Embodiment 2

[0117] In addition to using 5g of hexamethoxymelamine (Cyme1301, CYTEC company) as a crosslinking agent to replace the acrylate copolymer containing oxazoline groups used in the preparation of the water dispersion composition in Example 1, as implemented A back sheet for a photovoltaic module was prepared as described in Example 1.

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Abstract

The embodiments of the present invention relate to a backsheet for a photovoltaic module, a manufacturing method thereof, and the photovoltaic module. A backsheet manufacturing process is simplified by forming a resin layer including fluoric polymers by coating a base material with a dispersion composition including a crystalline fluoric polymer, a pigment, a dispersion binder, and water by an inline coating process in a base material manufacturing process. Productivity and quality are improved by environmentally friendly and economically manufacturing the backsheet without toxic organic solvents.

Description

technical field [0001] The present application relates to an environment-friendly backsheet for photovoltaic modules and a preparation method thereof. Background technique [0002] Today, due to global environmental concerns and the depletion of fossil fuels, there is an increasing focus on clean and renewable forms of energy. Among these forms of energy, as a representative of non-polluting energy that can solve the problems of environmental pollution and fossil fuel depletion, solar energy has attracted widespread attention. [0003] Photovoltaic cells are devices that use the principle of photovoltaic power generation to convert sunlight into electrical energy. Photovoltaic cells are exposed to the external environment for a long time to absorb sunlight. Therefore, the photovoltaic cell is manufactured into an element called a photovoltaic module by performing various encapsulation processes to protect the photovoltaic cell. [0004] In general, photovoltaic modules us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/049H01L31/18C08J5/18
CPCY02E10/50H01L31/049C08J5/18H01L31/042H01L31/18B32B27/08B32B27/304B32B27/308B32B27/32B32B27/34B32B27/36B32B27/40B32B2255/26B32B2307/712B32B2457/12C09D127/16
Inventor 权润京金贤哲
Owner LG CHEM LTD
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