CN101645465A - Solar cell module back veneer material - Google Patents

Solar cell module back veneer material Download PDF

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Publication number
CN101645465A
CN101645465A CN200910144746A CN200910144746A CN101645465A CN 101645465 A CN101645465 A CN 101645465A CN 200910144746 A CN200910144746 A CN 200910144746A CN 200910144746 A CN200910144746 A CN 200910144746A CN 101645465 A CN101645465 A CN 101645465A
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resin
parts
nano
polymer
fluorine resin
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Inventor
周光大
杨楚峰
潘建军
林建华
毛根兴
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SUZHOU FOSTER PV MATERIAL CO Ltd
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SUZHOU FOSTER PV MATERIAL CO Ltd
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Priority to CN200910144746A priority Critical patent/CN101645465A/en
Publication of CN101645465A publication Critical patent/CN101645465A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • H01L31/049—Protective back sheets
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

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  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Paints Or Removers (AREA)

Abstract

A solar cell module back veneer material comprises a base coat layer having high adhesive strength with EVA, two layers of fluororesin-containing weather resistance coating films and an intermediate polymer basilemma between the two layers of fluororesin-containing resin weather resistance coating films, wherein at least one layer of fluororesin-containing resin weather resistance coating film hashigh light reflection performance, the base coat layer having high adhesive strength with EVA and the weather resistance coating film having high light reflection performance in the coating film arearranged at the side close to a cell sheet in an encapsulated cell module, the fluororesin-containing resin masking liquid has good coating uniformity and good adhesive force with the polymer basilemma, and contains high reflection filler component with the constituents as the follows according to parts by weight: 100 parts of fluororesin-containing resin, 3-20 parts of curing agent, 10-30 parts of high reflection filler, 0.0003-0.0001 part of catalyst, and 50-200 parts of solvent.

Description

A kind of solar cell module back veneer material
Technical field
The present invention relates to a kind of back veneer material, to provide protection to the solar module back side as solar module.
Background technology
So-called solar photovoltaic generation system is meant the photovoltaic effect of utilizing solar cell, solar radiation is directly changed into a kind of new-generation system of electric energy.Crystal silicon cell is one of core of solar photovoltaic generation system, if crystal silicon cell is directly exposed in the atmosphere, is subjected to the influence of meteorologic factors such as light, heat, rain, snow, and the conversion efficiency of crystal silicon cell and useful life can reduce greatly.Therefore, adopt suitable package system that solar components is protected, to improve the useful life and the conversion efficiency of battery.Crystal silicon cell in the commercial solar panel need be protected with preposition clear glass and rearmounted back-protective layer (back veneer material).
Here the back veneer material of using should have following characteristics: the adverse effect that can resist harmful substance such as steam and chemical substance in the high low temperature variation of weather, solar ultraviolet, the atmosphere; should have good electronic isolation, dimensional stability simultaneously, good cementability be arranged with encapsulating material (normally EVA); its anti-aging property should be more than 25 years, thereby can protect the battery sheet of solar module inside well.
Publication number is the composite construction backboard of CN 101123278A in the prior art, and it is to adopt adhesive with two-layer polyvinyl fluoride thin film with one deck polyester film is gluing is combined with each other, and as shown in Figure 1: film 1 and film 5 are polyvinyl fluoride thin film; Film 2 and film 4 are adhesive linkage, as acrylic resin, mylar, polyurethane resin, polyamide, alkyd resins etc., have good bond performance; Film 3 is a polyester film, as PET, PEN etc., has excellent mechanical intensity, moisture barrier property and insulation property; This class backboard has good weatherability, but shortcoming such as cost height, reflectivity be low.
Summary of the invention
The purpose of this invention is to provide a kind of production technology simply, more frivolous, have excellent weather resisteant and excellent cementability arranged with the EVA glued membrane, and have good light reflectivity, be used for the back veneer material of solar module.
The technical solution used in the present invention is: a kind of solar cell module back veneer material, described back veneer material comprises that one deck and EVA have the priming coat of high bond strength, two-layer fluorine resin weatherability is filmed and the intermediate layer polymer basement membrane between two-layer fluorine resin weatherability is filmed, wherein have at least one deck fluorine resin weatherability to film and have high light reflective properties, there is the high light reflective properties weatherability of the priming coat of high bond strength and tool to film in the battery component encapsulation with EVA in the described coated film near battery sheet one side, described fluorine resin masking liquid has good coating uniformity, with polymer-based film good adhesive is arranged, and contain high reflectance filler composition, its each constituent mass umber is as follows:
100 parts of fluorine resins
3～20 parts in curing agent
10～30 parts of high reflection fillers
0.0003～0.001 part of catalyst
50～200 parts of solvents;
Described fluorine resin can be vinylidene (PVDF), trifluoro type (FEVE), tetrafluoro type (FEP) resin, and the trifluoro type is PVF-vinyl ethers (ester) copolymer; The tetrafluoro type is tetrafluoroethene and alkyl vinyl ether co-polymer or tetrafluoroethene and alkyl vinyl ester copolymer;
Described polymer-matrix membrane material can be polyamide (PA), polymethyl methacrylate (PMMA), PETG (PET), polybutylene terephthalate (PBT), polytrimethylene terephthalate (PTT), poly terephthalic acid hexamethylene dimethyl ester (PCT), polystyrene (PS), PEN (PEN) etc. or their blended product.
According to a preferred embodiment of the present invention, described fluorine resin coating layer thickness is 3～200 μ m; Described polymer-matrix film thickness is 20～500 μ m.
According to a preferred embodiment of the present invention, described priming coat is coated in wherein on the fluorine resin coating with the form of resin solution, increase fluorine resin coating surface polarity and surface energy, thus the adhesion strength of raising and EVA, and its each constituent mass umber is as follows:
100 parts of priming coat resins
0～20 part in curing agent
0～10 part of some other auxiliary agent
0～2 part of catalyst
150～400 parts of solvents;
Described primer thickness is 1～10 μ m, described priming coat resin can be to be the combination of the polyvinyl alcohol of 70～90mol% with saponification degree one of in the composition of the high polymer of vinyl acetate (VA) content is 16～40% ethylene-vinyl acetate copolymer resin, vitrification point is 30～90 ℃ mylar, acrylic resin, acrylamide resin, hydroxy functional groups or carboxyl functional group or epoxy functionality or these resins or these resins, and the concentration of described resin solution is 2～30 weight %.
According to a preferred embodiment of the present invention, described priming coat resin contains crosslinking agent, and described crosslinking agent is at least a in peroxyester, peroxy ketal and the two alkanes peroxide; Described crosslinking agent also can be at least a in polymer, urea resin, melmac and the epoxy resin of oxazoline group.
According to a preferred embodiment of the present invention, described priming coat resin contains auxiliary agent, can be antioxidant, ultraviolet absorber, light stabilizer, tackifier etc.
According to a preferred embodiment of the present invention, described high reflectance filler is one of following or wherein two or more mixture as base-material: as titanium dioxide, calcium carbonate, mica powder, talcum powder, clay, wollastonite in powder, quartz sand, metal oxide, graphite, porcelain powder, glass-cermic powder etc.; Described high reflectance filler contains high reflecting material composition, is made up of following a kind of or wherein two or more mixtures: nano silicon, nano titanium oxide, nano magnesia, nano zine oxide, nano aluminium oxide, nano tin dioxide, nano antimony doped tin oxide, nano-lithium fluoride, nanometer calcirm-fluoride, nanometer magnesium fluoride, nanometer barium fluoride, nano-calcium carbonate, hollow ceramic microballon, hollow glass microbead etc.
Beneficial effect of the present invention mainly shows: back veneer material of the present invention has excellent weatherability; with the EVA glued membrane excellent cementability is arranged; and have good light reflectivity, and can increase the power of solar module, be a kind of outstanding solar module packaging protection material.
Description of drawings
Fig. 1 is the cross-sectional view of traditional back veneer material;
Fig. 2 is the back veneer material cross-sectional view of preferred embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present invention is described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that protection scope of the present invention made more explicitly defines.
In embodiments of the present invention, described fluorine resin can be vinylidene (PVDF), trifluoro type (FEVE), tetrafluoro type (FEP), the trifluoro type is PVF-vinyl ethers (ester) copolymer, as chlorotrifluoroethylene and alkyl vinyl ether co-polymer, chlorotrifluoroethylene and alkyl vinyl ester copolymer; The tetrafluoro type is tetrafluoroethene and alkyl vinyl ether co-polymer or tetrafluoroethene and alkyl vinyl ester copolymer; This patent is preferably chlorotrifluoroethylene or TFE copolymer.This resinoid is normally by the copolymer of trifluoro-ethylene or tetrafluoroethylene monomer and vinyl ethers monomer or vinyl ester monomer, its main polymer chain is the block copolymer of fluoroolefins and alkyl vinyl ether (ester), owing to introduced alkyl vinyl ether (ester) etc., copolymer has solvent solubilized performance, vinyl ethers in the molecule (ester), hydroxyl, carboxyl can with curing agent generation cross-linking reactions such as isocyanates or melamine, be beneficial to film forming.
In embodiments of the present invention, the curing agent that is adopted is one of following or wherein two or more mixture: isocyanates, amino resins, blocked isocyanate, blocked isocyanate, melamine etc., this patent preferred isocyanate or amino resins.In coating process, curing agent functional group can with described polymer-based film surface functional group generation cross-linking reaction, make fluorine resin paints coating be bonded in the polymer-based film surface; Described functional groups is as the carboxylic acid group, sulfonic group, and the aziridine base, amino, NCO, melamine-based, epoxy radicals, hydroxyl, acid anhydrides etc.
In embodiments of the present invention, related fluorine resin can dilute with the form of solvent and make coating more even.Described alkyl vinyl ethers is one of following or wherein two or more mixture: cyclohexyl vinyl ether, hydroxy butyl vinyl ether, ethyl vinyl ether, glycidyl vinyl ethers etc. are preferably ethyl vinyl ether; Described alkyl vinyl ester is one of following or wherein two or more mixture: vinyl acetate, vinyl butyrate, vinyl caproate, hot valeric acid vinyl acetate, new n-nonanoic acid vinyl acetate, hot capric acid vinyl acetate etc. are preferably vinyl acetate.Interaction when between functional group such as ether, ester group, hydroxyl, carboxyl and polar molecule helps improving the solubility of copolymer, comprises water-soluble and the organic solvent solubility, and improves the pliability of resin (coating), the transparency, adhesive force etc.
In embodiments of the present invention, related polymer-matrix membrane material is that its thickness range of macromolecular sheet material material that has certain mechanical strength in-45 ℃ to 85 ℃ scopes is 20 μ m～500 μ m, as polyamide (PA), polymethyl methacrylate (PMMA), PETG (PET), polybutylene terephthalate (PBT), polytrimethylene terephthalate (PTT), poly terephthalic acid hexamethylene dimethyl ester (PCT), polystyrene (PS), PEN (PEN) etc. or their blended product, this patent is preferably PETG (PET) material, mechanical strength is provided, wet effect of resistance and electrical insulating property basement membrane can be the composite membranes of multiple material film, also can be that multiple material mixing is even, melt extrude, the stretching film forming; If needed, can also add various additives common in this area therein, as pigment, UV absorbers, coupling agent etc.
In embodiments of the present invention, related highly-reflective coating filler is one of following or wherein two or more mixture as base-material: as titanium dioxide, calcium carbonate, mica powder, talcum powder, clay, wollastonite in powder, quartz sand, metal oxide, graphite, porcelain powder, glass-cermic powder etc.; Described high its feature of reflection filler also is to contain high reflecting material composition, is made up of following a kind of or wherein two or more mixtures: nano silicon, nano titanium oxide, nano zine oxide, nano magnesia, nano aluminium oxide, nano tin dioxide, nano antimony doped tin oxide, nano-lithium fluoride, nanometer calcirm-fluoride, nanometer magnesium fluoride, nanometer barium fluoride, nano-calcium carbonate, hollow ceramic microballon, hollow glass microbead etc.; The preferred nano silicon of this patent, nano titanium oxide, nano zine oxide mixture are as high reflecting material composition.The radiant heat overwhelming majority of sunlight is in visible light and near infrared region, wavelength is between 400-1800nm, and show after deliberation, nano silicon has very strong albedo to the visible light far infrared, nano titanium oxide has very strong albedo to ultraviolet light, and nano zine oxide has very strong albedo to infrared light; When on the highly-reflective coating that the transparent glass of solar radiation light transmission and EVA glued membrane are radiated at backboard, highly-reflective coating reflects solar radiation light to the crystal silicon cell sheet again, thereby increase the photoelectric conversion efficiency of battery sheet unit are, increase battery component power.
For making coating have different surface colors, can select color dye according to different color demands, because of dispersed and deliquescent difference, the preferred titanium dioxide of the embodiment of the invention is as Chinese white.
Fluorine resin masking liquid herein can also add additive common in this area, as thickener, defoamer, levelling agent, coalescents, light stabilizer, coupling agent etc. if needed therein.
Back veneer material herein is coated in the form of resin solution wherein on the fluorine resin coating at described priming coat, increases fluorine resin coating surface polarity and surface energy, thereby improves the adhesion strength with EVA, and its each constituent mass umber is as follows:
100 parts of priming coat resins
0～20 part in curing agent
0～10 part of some other auxiliary agent
0～2 part of catalyst
150～400 parts of solvents
Priming coat resin herein can be to be the combination of the polyvinyl alcohol of 70～90mol% with saponification degree one of in the composition of the high polymer of vinyl acetate (VA) content is 16～40% ethylene-vinyl acetate copolymer resin, vitrification point is 30～90 ℃ mylar, acrylic resin, acrylamide resin, hydroxy functional groups or carboxyl functional group or epoxy functionality or these resins or these resins.Described priming coat can be coated in the form of solution on the fluorine resin coating, increases fluorine resin coating surface polarity and surface energy, thus the adhesion strength of raising and EVA.Concentration 2～30 weight % of described resin solution.
Preferred 30～90 ℃ of the vitrifying point of the high polymer of mylar herein, acrylic resin, acrylamide resin, hydroxy functional groups or carboxyl functional group or epoxy functionality, if vitrifying point is less than 30 ℃, then stick together sometimes between the film, if surpass 90 ℃, then coating layer becomes fragile and can not keep caking property.
The preferred vinyl acetate of ethylene-vinyl acetate copolymer resin (VA) content herein is 25%～35% resin.
The monomer of mylar herein can be one of following polyacid and polyalcohol or wherein two or more mixture: as polyol component, can be 1,6-hexylene glycol, 1,4-cyclohexanedimethanol, Xylene glycol, dihydroxy methylpropane, poly-(oxirane) glycol, DPG, diethylene glycol, 1,4-butanediol, ethylene glycol etc.As the polyacid composition, can be terephthalic acid (TPA), adipic acid, decanedioic acid, phthalic acid, M-phthalic acid, 2,6-is dioctyl phthalate, 1 how, 4-cyclohexane diacid, trimellitic acid, dimeric dibasic acid, 5-5-sodium sulfo isophthalate etc.
The monomer of acrylic resin herein can be one of following or wherein two or more mixture: methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, isobutyl acrylate, phenyl acrylate, cyclohexyl acrylate, methyl methacrylate, EMA, propyl methacrylate, butyl methacrylate, isobutyl methacrylate, phenyl methacrylate, cyclohexyl methacrylate, Isooctyl acrylate monomer, EHMA, hydroxypropyl acrylate, hydroxy-ethyl acrylate, methacrylic acid naphthalene ester, hydroxy propyl methacrylate, hydroxyethyl methacrylate, dodecylacrylate, lauryl methacrylate, 2 ethyl hexyl acrylate, 2-ethyl-methyl Hexyl 2-propenoate, acrylic acid dioctyl ester etc.
The monomer of acrylamide resin herein is one of following or wherein two or more mixture: N-alkyl acrylamide such as N methacrylamide, N, N-dialkyl group acrylamide such as N, N-DMAA, N-alkoxyl acid amides such as methylol amide, N-alkoxy propone acid amides such as n-butoxy acrylamide, N-vinyl lactam such as N-vinyl pyrrolidone, acrylamide, 1-aminoethyl-2-acrylamide 1-ammonia propylene-2-acrylamide etc.
The monomer of the high polymer of hydroxy functional groups herein or carboxyl functional group or epoxy functionality can be one of following or wherein two or more mixture: acrylic acid, methacrylic acid, fumaric acid, maleic acid, itaconic acid, acrylic acid 2-hydroxy methacrylate, 2-hydroxyethyl methacrylate, glycidyl acrylate, glycidyl methacrylate, allyl glycidyl ether, the isocyanic acid vinyl acetate, isocyanic acid propylene ester, styrene, AMS, vinyl methyl ether, vinyl trialkyl oxysilane, alkyl maleic acid monoesters, the alkyl fumaric monoalkylester, alkyl itaconic acid monoesters, acrylonitrile, methacrylonitrile, the epoxidized butadiene thing, the VCH oxide, oxireme glyceride, vinyl sulfide, the sorbic acid ethylene oxidic ester, the ricinoleic acid ethylene oxidic ester, epoxy vinyl ester etc.
The saponification degree of polyvinyl alcohol herein is 70～90mol%, if surpass 90mol%, if the caking property that does not then have with EVA is less than 70mol%, then moisture-proof can variation.
Embodiment of the invention optimal ethylene-vinyl acetate copolymer resin, methyl methacrylate and N hydroxymethyl acrylamide are the acrylic resin copolymer and poly-2 of monomer, 6-(ethylene naphthalate) resin is as priming coat, described primer thickness is 1～10 μ m, preferred 2～5 μ m.
The solvent that herein priming coat high-molecular copolymer uses is one of following or wherein two or more mixture, as toluene, dimethylbenzene, butanols, amylalcohol, isopropyl alcohol, phenol, ethyl acetate, butyl acetate, pentyl acetate, methyl ethyl ketone, methyl iso-butyl ketone (MIBK), isobutyl isobutyrate, HFC-134a, hexafluoro-2-propylene glycol, Hexafluoro acetone etc.; The concentration of described priming coat high-molecular copolymer in this solution normally about 10% to 40%, available following different mode is coated with, as spraying, dip-coating, roller coat, recessedly be coated with, scraper is coated with etc.
Priming coat resin herein contains little amount of crosslinking agent, and described crosslinking agent is at least a in peroxyester, peroxy ketal and the two alkanes peroxide.Described crosslinking agent is polymer, urea resin, melmac and the epoxy resin of Ke Yi Shi oxazolinyl also.
The peroxide crosslinking agent can be 1 herein, 1-two (tert-butyl hydroperoxide)-3,3,5-trimethyl-cyclohexane; 2,5-dimethylhexane-2,5-di-tert-butyl peroxide; 2,5-dimethyl-2, two (benzoyl the peroxide)-hexanes of 5-; Cumyl peroxide; Two (2-tert-butyl hydroperoxide isopropyl) benzene; The tert-butyl peroxide isopropylbenzene; Di-tert-butyl peroxide; The benzylhydroperoxide tert-pentyl ester; 2, two (tertiary pentyl the peroxide)-butane of 2-; Two t-amyl peroxy things; Tert butyl peroxy benzoate; Tert-butyl hydroperoxide-2 ethyl hexanoic acid ester; Tert-butyl hydroperoxide-3,5,5 Trimethylhexanoic acid ester; The dibenzoyl peroxide; Two (4-chlorobenzene formacyl) peroxide; Two (2,4-dichloro-benzoyl base) peroxide; Two (4-methyl benzoyl) peroxide; Normal-butyl-4,4-two (tert-butyl hydroperoxide) valerate; Ethyl-3,3-two (tert-butyl hydroperoxide) butyrate; Tert-butyl hydroperoxide-isopropyl carbonic ester; Tert-butyl hydroperoxide-2-ethylhexyl carbonic ester; The neighbour, neighbour-tert-butyl group-neighbour-isopropyl-list-peroxycarbonates; The neighbour, neighbour-tert-butyl group-neighbour-(2-ethylhexyl)-list-peroxycarbonates; The neighbour, neighbour-tertiary pentyl-neighbour-(2-ethylhexyl)-list-peroxycarbonates.
Some other herein crosslinking agent can be the addition polymerization oxazoline, and object lesson has 2-vinyl-2-oxazoline, 2-vinyl-4-methyl-2-oxazoline, 2-vinyl-5-methyl-2-oxazoline, 2-isopropenyl-2-oxazoline, 2-isopropenyl-4-methyl-2-oxazoline, 2-isopropenyl-5-methyl-2-oxazoline.Also can be urea resin, for example dimethylol urea, dihydroxymethyl ethylene urea, tetra methylol acetylene urea, 4-methoxyl group-5-dimethyl allene urea dihydroxymethyl etc.It also can be melamine methylol.Can also be epoxy resin, for example polyepoxides, di-epoxy compounds, mono-epoxy compounds.
Priming coat resin herein contains some auxiliary agents, as antioxidant, ultraviolet absorber, light stabilizer, tackifier etc.
Antioxidant can be selected from least a in phenols or phosphorous acid esters or both compounds, light stabilizer can be a hindered amines, and UV absorbers can be selected from least a in salicylic acid based compound, benzo oxazinyl compound, benzophenone based compound and the BTA based compound.
Fluorine resin coating layer thickness herein is 3～200 μ m (preferred 5～100 μ m), described polymer-matrix film thickness 20～500 μ m (preferred 30～300 μ m), and described primer thickness is 1～10 μ m (preferred 2～5 μ m).
In the present embodiment, at first introduce the preparation of fluorine resin masking liquid.
Fluorine resin masking liquid A: in the container of agitating device is housed, add 100 parts of LF100 trifluoro type resins and begin stirring, add 75 parts of hexones, 25 parts of dimethylbenzene, 21 parts of R-105 titanium dioxide powders, 1 part of VK-SP30 nano silicon, 0.5 part of VK-T06 nano titanium oxide, 0.5 part of VK-JS02 nano zine oxide, 0.00035 part of dibutyl tin laurate, 7.2 parts of DesmodurN3390 curing agent successively, stirred 40-60 minute, and made fluorine resin masking liquid A.
Fluorine resin masking liquid B: manufacture method and materials used except 100 parts of LF100 trifluoro type resin substitutions being become 100 parts of Zeffle GK570 tetrafluoro type resins, make fluorine resin masking liquid B with fluorine resin masking liquid A.
Fluorine resin masking liquid C: manufacture method and materials used are with fluorine resin masking liquid A, except 21 parts of R-105 titanium dioxide powders, 1 part of VK-SP30 nano silicon, 0.5 part of VK-T06 nano titanium oxide, 0.5 part of VK-JS02 nano zine oxide are replaced as 25 parts of ceramic fine beads, make fluorine resin masking liquid C.
Fluorine resin masking liquid D: manufacture method and materials used except 1 part of VK-SP30 nano silicon, 0.5 part of VK-T06 nano titanium oxide, 0.5 part of VK-JS02 nano zine oxide are removed, make fluorine resin masking liquid D with fluorine resin masking liquid A.
Introduce silane coupling agent preparation, silane coupling agent A then: in mass fraction, 100 parts of VA content is in 33% the ethylene-vinyl acetate copolymer, add 0.1 part of ultraviolet absorber 2,2 '-dihydroxy-4,4 '-dimethoxy-benzophenone, 0.1 part hindered amine light stabilizer two (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate/methyl isophthalic acid, 2,2,6,6-pentamethyl-4-piperidyl sebacate compound (mass ratio 1: 1), 0.2 the antioxidant 1,3 of part, 5-three (the 4-tert-butyl group-3-hydroxyl-2,6-dimethyl benzene methyl)-1,3,5-triazine-2,4,6-(1H, 3H, 5H)-triketone/two (2, the 4-dicumylphenyl) pentaerythritol diphosphites compounds (mass ratio 1: 4), 1.5 part crosslinking and curing agent neighbour, neighbour-tertiary pentyl-neighbour-(2-ethylhexyl)-list-peroxycarbonates and 0.4 part of tackifier gamma-aminopropyl-triethoxy-silane, and be dissolved in toluene, in the mixed solvent of isopropyl alcohol and dimethylbenzene (mol ratio 1: 1: 2), make priming coat A.
Silane coupling agent B: in mass fraction, 100 parts is the glycidyl ester type acrylic resin copolymer of monomer with methyl methacrylate and N hydroxymethyl acrylamide, 12 parts of crosslinking agent bicyclopentadiene epoxides, 0.2 part of catalyst hydrogen peroxide, add 0.1 part of hindered amine light stabilizer decanedioic acid two-2,2,6,6-tetramethyl piperidine alcohol ester, 0.2 the antioxidant 1 of part, 3,5-three (the 4-tert-butyl group-3-hydroxyl-2,6-dimethyl benzene methyl)-1,3,5-triazine-2,4,6-(1H, 3H, 5H)-and triketone/two (2, the 4-dicumylphenyl) pentaerythritol diphosphites compounds (mass ratio 1: 4), 0.2 part of ultraviolet absorber 2,2 '-dihydroxy-4,4 '-dimethoxy-benzophenone, and be dissolved in toluene, in the mixed solvent of isopropyl alcohol (mol ratio 1: 1), obtain priming coat B.
Silane coupling agent C: in mass fraction, 100 parts are gathered 2,6-(ethylene naphthalate) resin, 15 parts of crosslinking agent 2-isopropenyl-4-methyl-2-oxazolines, 0.1 part of catalyst hydrogen peroxide adds 0.01 part of hindered amine light stabilizer two (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate/methyl isophthalic acid, 2,2,6,6-pentamethyl-4-piperidyl sebacate compound (mass ratio 1: 1), 5 parts antioxidant 1,3,5-three (the 4-tert-butyl group-3-hydroxyl-2,6-dimethyl benzene methyl)-1,3,5-triazine-2,4,6-(1H, 3H, 5H)-triketone/three (2, the 4-di-tert-butyl-phenyl) phosphite ester compounds (mass ratio 1: 2), and be dissolved in phenol/tetrachloroethanes/isopropyl alcohol (mol ratio 2: 2: 1) mixed solvent, make priming coat C.
Next introduce the manufacturing process embodiment 1 of solar cell backboard.Use the scraper rubbing method that fluorine resin masking liquid A is coated on the thick PET basement membrane of 250 μ m,, obtain having the single face coated film of the thick fluorine resin coating of 25 μ m by 120 ℃ of heated-air drying film forming; Through same technology, the opposite side that fluorine resin masking liquid A is coated on the PET basement membrane obtains the double-coated film; The same scraper rubbing method that uses obtains having the coated film of the thick priming coat of 3 μ m with the side that silane coupling agent A is coated on the double-coated film.Referring to Fig. 2, wherein 6,8 for the fluorine resin weatherability is coated with rete, and 7 is polymer (PET) basement membrane, and 9 is priming coat.Heated-air drying 5min under 80 ± 5 ℃ temperature conditions, again through surface treatment, cut, coiling technique makes back veneer material.
Embodiment 2:
The backboard manufacture method is identical with embodiment 1 with materials used, except fluorine resin masking liquid A is replaced as fluorine resin masking liquid B, its coating process, drying and forming-film, surface treatment, cut, coiling technique is with embodiment 1.
Embodiment 3
The backboard manufacture method is identical with embodiment 1 with materials used, except fluorine resin masking liquid A is replaced as fluorine resin masking liquid C, its coating process, drying and forming-film, surface treatment, cut, coiling technique is with embodiment 1.
Embodiment 4
The backboard manufacture method is identical with embodiment 1 with materials used, except silane coupling agent A is replaced as silane coupling agent B, its coating process, drying and forming-film, surface treatment, cut, coiling technique is with embodiment 1.
Embodiment 5
The backboard manufacture method is identical with embodiment 1 with materials used, except silane coupling agent A is replaced as silane coupling agent C, its coating process, drying and forming-film, surface treatment, cut, coiling technique is with embodiment 1.
Embodiment 6
The backboard manufacture method is identical with embodiment 1 with materials used, except the PET basement membrane that 250 μ m are thick is replaced as the thick PA basement membrane of 250 μ m, its coating process, drying and forming-film, surface treatment, cut, coiling technique is with embodiment 1.
Comparative example 1:
By inside and outside two-layer be that to be the thick PET film of 200 μ m be composited through adhesive is gluing for the thick PVF film of 38 μ m and middle one deck.
Comparative example 2:
The backboard manufacture method is identical with embodiment 1 with materials used, except fluorine resin masking liquid A is replaced as fluorine resin masking liquid D, its coating process, drying and forming-film, surface treatment, cut, coiling technique is with embodiment 1.
Comparative example 3:
The backboard manufacture method is identical with embodiment 1 with materials used, except technology without coating silane coupling agent A, its coating process, drying and forming-film, surface treatment, cut, coiling technique is with embodiment 1.
Adopt above method to make back veneer material, performance index are measured by the following method
1. light reflectivity
Measuring reflectance instrument according to GB/T 13452.3-92, GB/T 9270-88, GB/T 5211.17-88, ISO3906-80 standard design is tested
2. with the peel strength of EVA
Carry out peel strength test according to GB/T2790
3. weatherability
3.1 carry out the ultraviolet irradiation burn-in test according to IEC IEC61215.
Experimental condition:
60 ± 5 ℃ of specimen surface temperature
Wavelength is the 280-385nm scope, and irradiation intensity is 15KWh/m 2
The xanthochromia index is by analyzing by GB2409-80.
3.2 carry out the hydrothermal aging test according to IEC IEC61215:
Experimental condition :+85 ± 2 ℃, 85 ± 5%, 1000 hours.
The results are shown in following table
From every The performance test results as can be known; back veneer material of the present invention has excellent weatherability, with the EVA glued membrane excellent cementability is arranged; and have good light reflectivity, and can increase the power of solar module, be the selection of rear surface of solar cell protective material excellence.
The above; it only is the specific embodiment of the present invention; but protection scope of the present invention is not limited thereto; any those of ordinary skill in the art are in the disclosed technical scope of the present invention; variation or the replacement that can expect without creative work all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range that claims were limited.

Claims (6)

1, a kind of solar cell module back veneer material, described back veneer material comprises that one deck and EVA have the priming coat of high bond strength, two-layer fluorine resin weatherability is filmed and the intermediate layer polymer basement membrane between two-layer fluorine resin weatherability is filmed, wherein have at least one deck fluorine resin weatherability to film and have high light reflective properties, there is the high light reflective properties weatherability of the priming coat of high bond strength and tool to film in the battery component encapsulation with EVA in the described coated film near battery sheet one side, described fluorine resin masking liquid has good coating uniformity, with polymer-based film good adhesive is arranged, and contain high reflectance filler composition, its each constituent mass umber is as follows:
100 parts of fluorine resins
3～20 parts in curing agent
10～30 parts of high reflection fillers
0.0003～0.001 part of catalyst
50～200 parts of solvents;
Described fluorine resin can be vinylidene (PVDF), trifluoro type (FEVE), tetrafluoro type (FEP) resin, and the trifluoro type is PVF-vinyl ethers (ester) copolymer; The tetrafluoro type is tetrafluoroethene and alkyl vinyl ether co-polymer or tetrafluoroethene and alkyl vinyl ester copolymer;
Described polymer-matrix membrane material can be polyamide (PA), polymethyl methacrylate (PMMA), PETG (PET), polybutylene terephthalate (PBT), polytrimethylene terephthalate (PTT), poly terephthalic acid hexamethylene dimethyl ester (PCT), polystyrene (PS), PEN (PEN) etc. or their blended product.
2, solar cell module back veneer material as claimed in claim 1 is characterized in that described fluorine resin coating layer thickness is 3～200 μ m; Described polymer-matrix film thickness is 20～500 μ m.
3, solar cell module back veneer material as claimed in claim 1, it is characterized in that described priming coat is coated in wherein on the fluorine resin coating with the form of resin solution, increase fluorine resin coating surface polarity and surface energy, thereby the adhesion strength of raising and EVA, its each constituent mass umber is as follows:
100 parts of priming coat resins
0～20 part in curing agent
0～10 part of some other auxiliary agent
0～2 part of catalyst
150～400 parts of solvents;
Described primer thickness is 1～10 μ m, described priming coat resin can be to be the combination of the polyvinyl alcohol of 70～90mol% with saponification degree one of in the composition of the high polymer of vinyl acetate (VA) content is 16～40% ethylene-vinyl acetate copolymer resin, vitrification point is 30～90 ℃ mylar, acrylic resin, acrylamide resin, hydroxy functional groups or carboxyl functional group or epoxy functionality or these resins or these resins, and the concentration of described resin solution is 2～30 weight %.
4, solar cell module back veneer material as claimed in claim 3 is characterized in that described priming coat resin contains crosslinking agent, and described crosslinking agent is at least a in peroxyester, peroxy ketal and the two alkanes peroxide; Described crosslinking agent also can be at least a in polymer, urea resin, melmac and the epoxy resin of oxazoline group.
5, solar cell module back veneer material as claimed in claim 3 is characterized in that described priming coat resin contains auxiliary agent, can be antioxidant, ultraviolet absorber, light stabilizer, tackifier etc.
6, solar cell module back veneer material as claimed in claim 1 or 2 is characterized in that described high reflectance filler is one of following or wherein two or more mixture as base-material: as titanium dioxide, calcium carbonate, mica powder, talcum powder, clay, wollastonite in powder, quartz sand, metal oxide, graphite, porcelain powder, glass-cermic powder etc.; Described high reflectance filler contains high reflecting material composition, is made up of following a kind of or wherein two or more mixtures: nano silicon, nano titanium oxide, nano magnesia, nano zine oxide, nano aluminium oxide, nano tin dioxide, nano antimony doped tin oxide, nano-lithium fluoride, nanometer calcirm-fluoride, nanometer magnesium fluoride, nanometer barium fluoride, nano-calcium carbonate, hollow ceramic microballon, hollow glass microbead etc.
CN200910144746A 2009-08-31 2009-08-31 Solar cell module back veneer material Pending CN101645465A (en)

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CN108131632A (en) * 2017-12-13 2018-06-08 柏涛涛 A kind of intelligent solar street light
CN109994566A (en) * 2017-12-28 2019-07-09 宁波长阳科技股份有限公司 Solar energy backboard membrane and preparation method thereof
CN109994566B (en) * 2017-12-28 2021-07-27 宁波长阳科技股份有限公司 Solar back panel film and preparation method thereof
CN108511548A (en) * 2018-04-19 2018-09-07 安徽六和同心风能设备有限公司 A kind of high barrier backboard for photovoltaic module
CN109742170A (en) * 2018-11-29 2019-05-10 常州回天新材料有限公司 Photovoltaic module solar energy backboard
CN111477707A (en) * 2020-04-27 2020-07-31 江苏东鋆光伏科技有限公司 Double-sided photovoltaic module adopting transparent plastic backboard and preparation process thereof
CN111477707B (en) * 2020-04-27 2021-08-06 江苏东鋆光伏科技有限公司 Double-sided photovoltaic module adopting transparent plastic backboard and preparation process thereof
CN114242844A (en) * 2022-01-04 2022-03-25 南京日托光伏新能源有限公司 Method for simultaneously producing multiple versions and multiple quantities of photovoltaic modules
CN114242844B (en) * 2022-01-04 2023-12-22 江苏日托光伏科技股份有限公司 Method for simultaneously producing multiple photovoltaic modules in multiple formats

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