CN103280475B - A kind of solar cell backboard and preparation method thereof - Google Patents
A kind of solar cell backboard and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to solar cell backboard technical field, relate in particular to solar cell backboard of a kind of weather resistant and preparation method thereof. In order to ensure the service life of solar cell backboard, can reduce the use amount of fluorine material in backboard to reduce costs simultaneously, the invention provides a kind of solar cell backboard and preparation method thereof, described backboard comprises outer weathering layer successively, barrier layer, structural reinforcing layer, interior weathering layer and tack coat; Described outer weathering layer is fluorine film; The material of described barrier layer is polyvinylidene chloride or ethylene/vinyl alcohol copolymer; The material of described structural reinforcing layer and interior weathering layer is PETG; Described tack coat is polyvinyl butyral resin or ethylene-vinyl acetate copolymer. Described solar cell backboard has good combination property, adopt five-layer co-squeezing preparation method, has simplified successively compound process route, easy operating.
Description
Technical field
The present invention relates to solar cell backboard technical field, relate in particular to a kind of solar cell backboard andIts preparation method.
Background technology
Due to the exhaustion day by day of fossil energy, people are also day by day urgent to the exploration of emerging energy, solar energyBe subject to people as a kind of wide material sources, nexhaustible emerging energy and more and more paid close attention to, the sunEnergy technology is also thereupon day by day ripe, but because solar components long term exposure is in outdoor application, can be subject toSteam, oxygen and ultraviolet impact and destruction, so need one deck to play the sun of support and protective effectCan battery back-sheet.
Because fluorine material has superior weatherability, so fluorine material can quilt in the back veneer material of industrializationBe placed on the top layer of backboard as barrier layer to improve the weatherability of solar cell backboard, but due to fluorineThe resource scarcity of resin own causes holding at high price, and fluororesin fusing point is higher, is difficult to processing, instituteStart to explore the use amount of how to replace fluorine material or reduction fluorine material with other material with people,But still can obtain good weatherability.
Summary of the invention
In order to ensure the service life of solar cell backboard, simultaneously can reduce fluorine material in backboardUse amount, to reduce costs, the invention provides a kind of solar cell backboard and preparation method thereof. The present inventionThe solar cell backboard inner side providing is provided with interior weathering layer, has taken into account resistance in replacing fluorine materialHou Xing, and outer surface still keeps stronger weatherability with fluorine material; Solar energy provided by the inventionThe combination properties such as the weatherability of battery back-sheet are better; In addition, this solar cell backboard adopts five-layer co-squeezingOne step technique, has simplified successively compound process route, easy operating.
For reaching above object, technical scheme of the present invention is as follows:
Solar cell backboard of the present invention (also referred to as solar cell backboard film, solar energy backboard,Or composite membrane) comprise successively outer weathering layer, barrier layer, structural reinforcing layer, interior weathering layer and tack coat;Described outer weathering layer is fluorine film; The material of described barrier layer be polyvinylidene chloride (PVDC) or ethene/Ethenol copolymer (EVOH); The material of described structural reinforcing layer and interior weathering layer comprises poly-terephthaldehydeAcid glycol ester (PET); Described tack coat is polyvinyl butyral resin (PVB) or ethene-vinyl acetateCopolymer (EVA). Further, the material of described structural reinforcing layer and interior weathering layer is identical. Further, the material of described structural reinforcing layer and interior weathering layer is PETG (PET).
Described bonding layer material is ethylene-vinyl acetate copolymer, wherein, and vinyl acetate content≤14%.Melt index≤10g/10min (melt index test condition: 190 DEG C, 2.16kg). Vinyl acetate contentHigher, or the higher five-layer co-squeezing one-step preparation process that is unfavorable for of melt index, can be easily at wrapup procedureThe outer weathering layer of middle adhesion; Vinyl acetate content is lower, or lower its caking property variation that can make again of melt index.
Described solar cell backboard thickness is 280-400 μ m, and its China and foreign countries' weathering layer, barrier layer, structure increaseThe thickness of strong layer, interior weathering layer and tack coat account for respectively solar cell backboard thickness 10-20%, 5-10%,50-70%, 10-20% and 5-10%.
Further, described solar cell backboard is five-layer co-squeezing structure.
Further, described outer weathering layer material comprises polyvinyl fluoride (PVF), Kynoar (PVDF)One; Described structural reinforcing layer material comprises PET section, 1-10% inorganic particulate and the 1-5% of 85-98%Chain extender. The percentage composition of described material is weight percentage. Wherein the intrinsic viscosity of PET section is0.6-0.8dL/g, inorganic particulate is selected from barium sulfate, titanium dioxide or its combination; Described chain extender is selected from epoxyType polymer.
Further, described interior weathering layer material comprises the PET section of 90-99% and the hydrolysis of 1%-10%Agent. Wherein the intrinsic viscosity of PET section is 0.8-1.2dL/g, and described hydrolysis agent is selected from carbodiimides typePolymer.
Described barium sulfate particle diameter is 0.5-2 μ m, and titanium dioxide particle diameter is 0.3-0.5 μ m. Described expansionChain agent is the one in tetraglycidel ether epoxy resin or maleic anhydride graft epoxy resin. Described is resistance toHydrolytic reagent is the one in haplotype carbodiimides or aggretion type carbodiimides.
Further, described outer weathering layer is PVF or PVDF, and the thickness of described outer weathering layer accounts for solar energyThe 10-20% of battery back-sheet thickness; The material of described barrier layer is PVDC or EVOH, described barrier layerThickness accounts for the 5-10% of solar cell backboard thickness; The material of described structural reinforcing layer comprises85-98%PET, 1-10% barium sulfate, titanium dioxide or its combination, and 1-5% chain extender, described structure increasesThe thickness of strong layer accounts for the 50-70% of solar cell backboard thickness; The material of described interior weathering layer comprisesThe hydrolysis agent of 90-99%PET section and 1-10%, the thickness of described interior weathering layer accounts for solar cell backboardThe 10-20% of thickness; Described tack coat is PVB or EVA, and the thickness of described tack coat accounts for solar cellThe 5-10% of back plate thickness.
Further, described outer weathering layer is PVF or pvdf membrane, accounts for solar cell backboard thickness10-15%; The material of described barrier layer is PVDC or EVOH, accounts for solar cell backboard thickness5-10%; The material of described structural reinforcing layer comprises 88-95%PET, 3-8% barium sulfate, titanium dioxide or itsCombination, and 2-4% chain extender, accounts for the 50-60% of solar cell backboard thickness; The material of described interior weathering layerMaterial comprises the hydrolysis agent of 92-98%PET section and 2-8%, accounts for the 15-20% of solar cell backboard thickness;Described tack coat is EVA, accounts for the 5-10% of solar cell backboard thickness.
Further, the preparation method of described solar cell backboard is as follows: (1) is same by the raw material of each layerTime carry out respectively fusion plastification, plastify good melt and enter casting mold and extrude formation by distributorWithout the composite membrane of interface fusion; The processing temperature 180-220 DEG C of the extruder of its China and foreign countries' weathering layer, barrier layerThe processing temperature 180-200 DEG C of extruder, the processing temperature of the extruder of structural reinforcing layer is 250-280DEG C, the processing temperature of the extruder of interior weathering layer is 250-280 DEG C, the processing temperature of the extruder of tack coatFor 120-180 DEG C. Above-mentioned extruder is five extruders, and the raw material of each layer comprises single raw material and mixingRaw material. (2) the 80-140 DEG C of online high-temperature shaping 2min of five layers of composite membranes process extruding from mould, cooling,Rolling.
Compared with prior art, the interior weathering layer of the non-fluorine polyester-type of the present invention is in the weatherability that does not affect backboardUnder energy prerequisite, well protection of the environment; And reduce the use amount of fluorine material in backboard, reached and fallenObject cheaply. The present invention by the selection of solar cell backboard layers of material and component proportioning andOptimize, make backboard there is good combination property. The tack coat of solar cell backboard provided by the invention(also claiming adhesive layer) can with solar energy encapsulating material in PUR be well bonded together, make the sunCan play lasting protective effect by backboard. The present invention directly prepares solar cell by multi-layer co-extruded technologyBackboard, has simplified successively compound process route, easy operating.
Brief description of the drawings
Fig. 1 is the structural representation of solar cell backboard provided by the invention.
Wherein, 1 is outer weathering layer, and 2 is barrier layer, and 3 is structural reinforcing layer, and 4 is interior weathering layer, and 5 areTack coat.
Detailed description of the invention
The present invention's material and facility used is current material and equipment.
As shown in Figure 1, solar cell backboard provided by the invention comprises outer weathering layer 1 successively, barrier layer 2,Structural reinforcing layer 3, interior weathering layer 4 and tack coat 5; Described outer weathering layer 1 is fluorine film; Described barrier layer 2Material is polyvinylidene chloride or ethylene/vinyl alcohol copolymer; Described structural reinforcing layer 3 and interior weathering layer 4Material comprises PETG; Described tack coat 5 is polyvinyl butyral resin or ethene-acetic acidEthylene copolymer.
The preparation method of solar cell backboard provided by the invention comprises the steps:
(1) mixed material of each layer is carried out respectively to fusion plastification simultaneously, plastify good melt and pass through distributorEnter casting mold and extrude the composite membrane forming without interface fusion; Adding of the extruder of its China and foreign countries' weathering layerWork temperature is 180-220 DEG C, and the processing temperature of the extruder of barrier layer is 180-200 DEG C, structural reinforcing layerThe processing temperature of extruder is 250-280 DEG C, and the processing temperature of the extruder of interior weathering layer is 250-280 DEG C,The processing temperature of the extruder of tack coat is 120-180 DEG C; The thickness that bore control by mould is each layer.
(2) five layers of composite membrane extruding from mould are through 80-140 DEG C of online high-temperature shaping 2min, cooling, rolling.
The testing standard of the properties of the prepared solar cell backboard of the present invention is as follows:
Hot strength and elongation at break: according to GB/T1040-2006 standard, adopt U.S.'s InstronThe INSTRON universal testing machine that company produces, the hot strength of testing backboard and elongation at break.
Peel strength: according to GB/T2790-1995 standard testing.
Moisture-vapor transmission: according to GB/T26253-2001 standard testing, adopt TSY-W2 steam saturatingCrossing rate tester tests backboard.
Weatherability test: PCT test is commonly referred to as pressure cooker cooking test or saturated vapor test, sampleProduct, at 121 DEG C, under 100% relative humidity environment, are placed 60 hours, test afterwards the extension at break of sampleRate.
Two 85 experiments refer to sample at 85 DEG C, under 85% relative humidity environment, place 2000 hours,Test afterwards the LAB value of sample, wherein b value represents blue to yellow color change.
Breakdown voltage test: according to GB/T13542.2-2009 standard testing, adopt breakdown strength testerBackboard is tested.
Shelf depreciation is pressed test: according to IEC60664-1-2007 standard testing, adopt GYJF-II part to putElectric tester is tested.
Material content percentage in following embodiment is weight percentage.
Embodiment 1
Prepare according to the method described above solar cell backboard, gross thickness is 330 μ m. Described outer weathering layer accounts for10% of composite membrane (, solar cell backboard) thickness, barrier layer accounts for 8% of composite membrane gross thickness,Structural reinforcing layer accounts for 62% of composite membrane gross thickness, and interior weathering layer accounts for 15% of composite membrane gross thickness, bondingLayer accounts for 5% of composite membrane gross thickness. Wherein, described outer weathering layer is PVF film; Described barrier layer is PVDCFilm; Described structural reinforcing layer comprises 88% PET section, and inherent viscosity is 0.7dL/g, 9% sulfuric acidGranellae, particle diameter is 1 μ m, 3% epoxy polymer; Described interior weathering layer comprises 95% PET section,5% haplotype carbodiimides; Described tack coat is PVB film. Gained backboard correlated performance is in table 1.
Embodiment 2
Prepare according to the method described above solar cell backboard, gross thickness is 330 μ m. Described outer weathering layer accounts for12% of composite membrane thickness, barrier layer accounts for 7% of composite membrane gross thickness, and structural reinforcing layer accounts for composite membrane total thickness58% of degree, interior weathering layer accounts for 16% of composite membrane gross thickness, and tack coat accounts for 7% of composite membrane gross thickness.Wherein, described outer weathering layer is PVF film; Described barrier layer is PVDC film; Described structural reinforcing layer bagDraw together 90% PET section, inherent viscosity is 0.7dL/g, 6% barium sulfate particle, and particle diameter is 1.5 μ m,4% epoxy polymer; Described interior weathering layer comprises 95% PET section, 5% haplotype carbonization twoImines; Described tack coat is PVB film. Gained backboard correlated performance is in table 1.
Embodiment 3
Prepare according to the method described above solar cell backboard, gross thickness is 350 μ m. Described outer weathering layer accounts for15% of composite membrane thickness, barrier layer accounts for 5% of composite membrane gross thickness, and structural reinforcing layer accounts for composite membrane total thickness63% of degree, interior weathering layer accounts for 12% of composite membrane gross thickness, and tack coat accounts for 5% of composite membrane gross thickness.Wherein, described outer weathering layer is pvdf membrane; Described barrier layer is PVDC film; Described structural reinforcing layerComprise 91% PET section, inherent viscosity is 0.7dL/g, 5% TiO 2 particles, and particle diameter is 0.3 μ m,4% epoxy polymer; Described interior weathering layer comprises 95% PET section, 5% polycarbodiimide;Described tack coat is eva film. Gained backboard correlated performance is in table 1.
Embodiment 4
Prepare according to the method described above solar cell backboard, gross thickness is 340 μ m. Described outer weathering layer accounts for18% of composite membrane thickness, barrier layer accounts for 8% of composite membrane gross thickness, and structural reinforcing layer accounts for composite membrane total thickness50% of degree, interior weathering layer accounts for 16% of composite membrane gross thickness, and tack coat accounts for 8% of composite membrane gross thickness.Wherein, described outer weathering layer is pvdf membrane; Described barrier layer is PVDC film; Described structural reinforcing layerComprise 93% PET section, inherent viscosity is 0.8dL/g, 4% TiO 2 particles, and particle diameter is 0.3 μ m,3% epoxy polymer; Described interior weathering layer comprises 97% PET section, 3% polycarbodiimide;Described tack coat is eva film. Gained backboard correlated performance is in table 1.
Embodiment 5
Prepare according to the method described above solar cell backboard, gross thickness is 360 μ m. Described outer weathering layer accounts for14% of composite membrane thickness, barrier layer accounts for 6% of composite membrane gross thickness, and structural reinforcing layer accounts for composite membrane total thickness61% of degree, interior weathering layer accounts for 13% of composite membrane gross thickness, and tack coat accounts for 6% of composite membrane gross thickness.Wherein, described outer weathering layer is pvdf membrane; Described barrier layer is PVDC film; Described structural reinforcing layerComprise 95% PET section, inherent viscosity is 0.75dL/g, 3% TiO 2 particles, and particle diameter is0.3 μ m, 2% epoxy polymer; Described interior weathering layer comprises 96% PET section, 4% poly-carbonizationDiimine; Described tack coat is eva film. Gained backboard correlated performance is in table 1.
Table 1 embodiment 1-5 gained solar cell backboard performance test table
Embodiment 6
Prepare according to the method described above solar cell backboard, gross thickness is 280 μ m. Described outer weathering layer accounts for10% of composite membrane thickness, barrier layer accounts for 5% of composite membrane gross thickness, and structural reinforcing layer accounts for composite membrane total thickness70% of degree, interior weathering layer accounts for 10% of composite membrane gross thickness, and tack coat accounts for 5% of composite membrane gross thickness.Wherein, described outer weathering layer is PVF film; Described barrier layer is PVDC film; Described structural reinforcing layer bagDraw together 85% PET section, inherent viscosity is 0.7dL/g, 10% barium sulfate and the group of TiO 2 particlesClose (weight ratio is 1:1), particle diameter is 1 μ m, 5% epoxy polymer; Described interior weathering layer comprises 95%PET section, 5% haplotype carbodiimides; Described tack coat is PVB film. Gained backboardCorrelated performance is in table 2.
Embodiment 7
Prepare according to the method described above solar cell backboard, gross thickness is 400 μ m. Described outer weathering layer accounts for15% of composite membrane thickness, barrier layer accounts for 10% of composite membrane gross thickness, and it is total that structural reinforcing layer accounts for composite membrane50% of thickness, interior weathering layer accounts for 15% of composite membrane gross thickness, and tack coat accounts for 10% of composite membrane gross thickness.Wherein, described outer weathering layer is pvdf membrane; Described barrier layer is EVOH film; Described structural reinforcing layerComprise 95% PET section, inherent viscosity is 0.8dL/g, 3% barium sulfate particle, and particle diameter is 1.5 μ m,2% epoxy polymer; Described interior weathering layer comprises 99% PET section, 1% haplotype carbonization twoImines; Described tack coat is PVB film. Gained backboard correlated performance is in table 2.
Embodiment 8
Prepare according to the method described above solar cell backboard, gross thickness is 300 μ m. Described outer weathering layer accounts for20% of composite membrane thickness, barrier layer accounts for 7% of composite membrane gross thickness, and structural reinforcing layer accounts for composite membrane total thickness53% of degree, interior weathering layer accounts for 12% of composite membrane gross thickness, and tack coat accounts for 8% of composite membrane gross thickness.Wherein, described outer weathering layer is PVF film; Described barrier layer is PVDC film; Described structural reinforcing layer bagDraw together 98% PET section, inherent viscosity is 1.2dL/g, 1% TiO 2 particles, and particle diameter is 0.3 μ m,1% epoxy polymer; Described interior weathering layer comprises 90% PET section, 10% polycarbodiimide;Described tack coat is PVB film. Gained backboard correlated performance is in table 2.
Embodiment 9
Prepare according to the method described above solar cell backboard, gross thickness is 340 μ m. Described outer weathering layer accounts for12% of composite membrane thickness, barrier layer accounts for 8% of composite membrane gross thickness, and structural reinforcing layer accounts for composite membrane total thickness55% of degree, interior weathering layer accounts for 20% of composite membrane gross thickness, and tack coat accounts for 5% of composite membrane gross thickness.Wherein, described outer weathering layer is pvdf membrane; Described barrier layer is EVOH film; Described structural reinforcing layerComprise 88% PET section, inherent viscosity is 0.8dL/g, 8% barium sulfate particle, and particle diameter is 1.3 μ m,4% epoxy polymer; Described interior weathering layer comprises 98% PET section, 2% polycarbodiimide;Described tack coat is eva film. Gained backboard correlated performance is in table 2.
Embodiment 10
Prepare according to the method described above solar cell backboard, gross thickness is 360 μ m. Described outer weathering layer accounts for15% of composite membrane thickness, barrier layer accounts for 5% of composite membrane gross thickness, and structural reinforcing layer accounts for composite membrane total thickness60% of degree, interior weathering layer accounts for 15% of composite membrane gross thickness, and tack coat accounts for 5% of composite membrane gross thickness.Wherein, described outer weathering layer is PVF film; Described barrier layer is PVDC film; Described structural reinforcing layer bagDraw together 95% PET section, inherent viscosity is 0.75dL/g, 3% TiO 2 particles, and particle diameter is 0.3 μ m,2% epoxy polymer; Described interior weathering layer comprises 92% PET section, 8% polycarbodiimide;Described tack coat is eva film. Gained backboard correlated performance is in table 2.
Table 2 embodiment 6-10 gained solar cell backboard performance test table
Embodiment 11
Prepare according to the method described above solar cell backboard, gross thickness is 380 μ m. Described outer weathering layer accounts for10% of composite membrane thickness, barrier layer accounts for 10% of composite membrane gross thickness, and it is total that structural reinforcing layer accounts for composite membrane55% of thickness, interior weathering layer accounts for 15% of composite membrane gross thickness, and tack coat accounts for 10% of composite membrane gross thickness.Wherein, described outer weathering layer is PVF film; Described barrier layer is PVDC film; Described structural reinforcing layer bagDraw together 88% PET section, inherent viscosity is 0.7dL/g, 8% barium sulfate and the group of TiO 2 particlesClose (weight ratio is 1:1), particle diameter is 1 μ m, 4% epoxy polymer; Described interior weathering layer comprises 95%PET section, 5% haplotype carbodiimides; Described tack coat is eva film. Gained backboardCorrelated performance is in table 3.
Embodiment 12
Prepare according to the method described above solar cell backboard, gross thickness is 300 μ m. Described outer weathering layer accounts for10% of composite membrane thickness, barrier layer accounts for 5% of composite membrane gross thickness, and structural reinforcing layer accounts for composite membrane total thickness60% of degree, interior weathering layer accounts for 15% of composite membrane gross thickness, and tack coat accounts for 10% of composite membrane gross thickness.Wherein, described outer weathering layer is pvdf membrane; Described barrier layer is EVOH film; Described structural reinforcing layerComprise 90% PET section, inherent viscosity is 0.7dL/g, 6% barium sulfate particle, and particle diameter is 1.5 μ m,4% epoxy polymer; Described interior weathering layer comprises 96% PET section, 4% haplotype carbonization two AsiasAmine; Described tack coat is eva film. Gained backboard correlated performance is in table 3.
Embodiment 13
Prepare according to the method described above solar cell backboard, gross thickness is 310 μ m. Described outer weathering layer accounts for13% of composite membrane thickness, barrier layer accounts for 7% of composite membrane gross thickness, and structural reinforcing layer accounts for composite membrane total thickness60% of degree, interior weathering layer accounts for 12% of composite membrane gross thickness, and tack coat accounts for 8% of composite membrane gross thickness.Wherein, described outer weathering layer is PVF film; Described barrier layer is PVDC film; Described structural reinforcing layer bagDraw together 96% PET section, inherent viscosity is 1.0dL/g, 3% TiO 2 particles, and particle diameter is 0.3 μ m,1% epoxy polymer; Described interior weathering layer comprises 93% PET section, 7% polycarbodiimide;Described tack coat is eva film. Gained backboard correlated performance is in table 3.
Embodiment 14
Prepare according to the method described above solar cell backboard, gross thickness is 340 μ m. Described outer weathering layer accounts for15% of composite membrane thickness, barrier layer accounts for 10% of composite membrane gross thickness, and it is total that structural reinforcing layer accounts for composite membrane50% of thickness, interior weathering layer accounts for 20% of composite membrane gross thickness, and tack coat accounts for 5% of composite membrane gross thickness.Wherein, described outer weathering layer is pvdf membrane; Described barrier layer is EVOH film; Described structural reinforcing layerComprise 92% PET section, inherent viscosity is 0.8dL/g, 6% barium sulfate particle, and particle diameter is 1.3 μ m,2% epoxy polymer; Described interior weathering layer comprises 97% PET section, 3% polycarbodiimide;Described tack coat is eva film. Gained backboard correlated performance is in table 3.
Embodiment 15
Prepare according to the method described above solar cell backboard, gross thickness is 360 μ m. Described outer weathering layer accounts for14% of composite membrane thickness, barrier layer accounts for 6% of composite membrane gross thickness, and structural reinforcing layer accounts for composite membrane total thickness55% of degree, interior weathering layer accounts for 17% of composite membrane gross thickness, and tack coat accounts for 8% of composite membrane gross thickness.Wherein, described outer weathering layer is PVF film; Described barrier layer is PVDC film; Described structural reinforcing layer bagDraw together 95% PET section, inherent viscosity is 0.75dL/g, 3% TiO 2 particles, and particle diameter is 0.3 μ m,2% epoxy polymer; Described interior weathering layer comprises 92% PET section, 8% polycarbodiimide;Described tack coat is eva film. Gained backboard correlated performance is in table 3.
Table 3 embodiment 11-15 gained solar cell backboard performance test table
Comparative example 1
Prepare according to the method described above solar cell backboard, gained back plate thickness and layers of material are as embodiment 1Described, different, barrier material is selected polyamide (PA). Correlated performance is in table 4.
Comparative example 2
Prepare according to the method described above solar cell backboard, gained back plate thickness and layers of material are as embodiment 2Described, different, structural reinforcing layer and interior weathering layer material selection polypropylene (PP), correlated performance is shown inTable 4.
Comparative example 3
Prepare according to the method described above solar cell backboard, gained back plate thickness and layers of material are as embodiment 3Described, different, bonding layer material is selected polyethyl methacrylate, and correlated performance is in table 4.
Comparative example 4
Prepare solar cell backboard, gained back plate thickness and layers of material as described in Example 4, backboardEach layer by hot pressing compoiste adhering together, and correlated performance is in table 4.
Table 4 comparative example 1-4 gained solar cell backboard performance test table
If table 1 is to as shown in table 4 performance test data, the present invention passes through each layer of solar cell backboardThe choice and optimization of material and component proportioning, makes backboard have good weather resistance and mechanical property; ThisThe adhesive layer of the solar cell backboard that provides of invention can with solar energy encapsulating material in PUR goodBe bonded together, make solar energy backboard play lasting protective effect, and solar cell backboard adopts fiveLayer squeezing one-step method technology, has simplified successively compound process route, easy operating.
The above, be only preferred embodiment of the present invention, is not intended to limit protection of the present inventionScope. Every equalization that content is done according to the present invention changes and modifies, and is all encompassed in patent of the present inventionIn scope.
Claims (2)
1. a solar cell backboard, is characterized in that, described solar cell backboard comprises outer weathering layer successively,Barrier layer, structural reinforcing layer, interior weathering layer and tack coat;
Described solar cell backboard thickness is 280-400 μ m;
Described solar cell backboard is five-layer co-squeezing structure;
Described outer weathering layer is PVF or pvdf membrane, accounts for the 10-15% of solar cell backboard thickness; Described resistanceThe material of interlayer is PVDC or EVOH, accounts for the 5-10% of solar cell backboard thickness; Described structural reinforcingThe material 95%PET of layer, 3% titanium dioxide, and 2% chain extender, account for solar cell backboard thickness50-60%; The material of described interior weathering layer comprises the hydrolysis agent of 92%PET section and 8%, accounts for solar-electricityThe 15-20% of pond back plate thickness; Described tack coat is EVA, accounts for the 5-10% of solar cell backboard thickness.
2. a preparation method for solar cell backboard claimed in claim 1, is characterized in that, described preparationMethod is as follows:
(1) raw material of each layer is carried out respectively to fusion plastification simultaneously, plastify good melt and enter stream by distributorProlong mould and extrude the composite membrane forming without interface fusion; The extruder processing temperature of its China and foreign countries' weathering layer is180-220 DEG C, the extruder processing temperature of barrier layer is 180-200 DEG C, the extruder processing of structural reinforcing layerTemperature is 250-280 DEG C, and the extruder processing temperature of interior weathering layer is 250-280 DEG C, the extruder of tack coatProcessing temperature is 120-180 DEG C;
(2) five layers of composite membrane extruding from mould are through 80-140 DEG C of online high-temperature shaping 2min, cooling, rolling.
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| CN102157591A (en) * | 2011-01-11 | 2011-08-17 | 山东东岳高分子材料有限公司 | Back panel of solar cell and preparation method thereof |
| CN102945877A (en) * | 2012-11-30 | 2013-02-27 | 云南云天化股份有限公司 | Solar cell back plate and solar cell |
| CN103022195A (en) * | 2012-12-13 | 2013-04-03 | 江苏盛福高分子材料科技有限公司 | Novel FPC solar insulation rear panel and manufacture method thereof |
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| CN102738275B (en) * | 2011-04-12 | 2014-12-10 | 苏州尚善新材料科技有限公司 | Solar cell assembly backplane and preparation method thereof |
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| US6214477B1 (en) * | 1998-07-17 | 2001-04-10 | Cryovac, Inc. | Multilayer film with polyolefin and polyvinyl chloride |
| CN102157591A (en) * | 2011-01-11 | 2011-08-17 | 山东东岳高分子材料有限公司 | Back panel of solar cell and preparation method thereof |
| CN102945877A (en) * | 2012-11-30 | 2013-02-27 | 云南云天化股份有限公司 | Solar cell back plate and solar cell |
| CN103022195A (en) * | 2012-12-13 | 2013-04-03 | 江苏盛福高分子材料科技有限公司 | Novel FPC solar insulation rear panel and manufacture method thereof |
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Address after: Qingfeng Road, Jiangbei District 315000 in Zhejiang city of Ningbo province No. 999 Patentee after: Ningbo, Changyang, Polytron Technologies Inc Address before: 315031 Zhejiang province Jiangbei District of Ningbo City Green Road Zhu Xiang (1) - (4) Patentee before: Ningbo Changyang Technology Co., Ltd. |
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Application publication date: 20130904 Assignee: Ningbo Changlong New Material Co.,Ltd. Assignor: NINGBO SOLARTRON TECHNOLOGY Co.,Ltd. Contract record no.: X2021330000199 Denomination of invention: The invention relates to a solar cell back plate and a preparation method thereof Granted publication date: 20160504 License type: Common License Record date: 20210831 |