CN103280475A - Solar battery backplate and preparation method thereof - Google Patents
Solar battery backplate and preparation method thereof Download PDFInfo
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- CN103280475A CN103280475A CN2013101596690A CN201310159669A CN103280475A CN 103280475 A CN103280475 A CN 103280475A CN 2013101596690 A CN2013101596690 A CN 2013101596690A CN 201310159669 A CN201310159669 A CN 201310159669A CN 103280475 A CN103280475 A CN 103280475A
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Abstract
The invention relates to the technical field of solar battery backplates and particularly relates to a weather-proof solar battery backplate and a preparation method thereof. In order to ensure the service life of the solar battery backplate and meanwhile lower the use amount of a fluorine material in the backplate and the cost, the invention provides a solar battery backplate and a preparation method thereof. The backplate sequentially comprises an outer weather-proof layer, an isolation layer, a structure reinforcement layer, an inner weather-proof layer and a binding layer, wherein the outer weather-proof layer is a fluorine film; the isolation layer is made of polyvinylidene chloride or an ethylene/vinyl alcohol copolymer; the structure reinforcement layer and the inner weather-proof layer are made of polyethylene terephthalate; and the binding layer is made of polyvinyl butyral or an ethylene-vinyl acetate copolymer. The solar battery backplate has better over-all properties; and a five-layer coextrusion preparation method is adopted, so that the layer-by-layer compounding process route is simplified, and the preparation method is easy to operate.
Description
Technical field
The present invention relates to the solar cell backboard technical field, relate in particular to a kind of solar cell backboard and preparation method thereof.
Background technology
Because fossil energy is exhausted day by day; people are also urgent day by day to the exploration of emerging energy; solar energy has been subjected to people as a kind of wide material sources, nexhaustible emerging energy and has more and more paid close attention to; heliotechnics is also day by day ripe thereupon; but because the solar components long term exposure is in outdoor application; can be subjected to steam, oxygen and ultraviolet influence and destruction, so need one deck to play the solar cell backboard of support and protective effect.
Because the fluorine material has superior weatherability, so the fluorine material can be used as barrier layer and be placed on the top layer of backboard to improve the weatherability of solar cell backboard in the back veneer material of industrialization, but because the resource scarcity of fluororesin own causes holding at high price, and the fluororesin fusing point is higher, be difficult to processing, so people begin to explore use amount how to use other material to replace fluorine material or reduction fluorine material, but still can obtain better weather.
Summary of the invention
In order to guarantee the useful life of solar cell backboard, can reduce the use amount of fluorine material in backboard to reduce cost simultaneously, the invention provides a kind of solar cell backboard and preparation method thereof.Solar cell backboard provided by the invention inboard is provided with interior weathering layer, taken into account weatherability when replacing the fluorine material, and outer surface uses still the fluorine material to keep stronger weatherability; Combination properties such as the weatherability of solar cell backboard provided by the invention are better; In addition, this solar cell backboard adopts five-layer co-squeezing one step technique, has simplified successively compound process route, easy operating.
For reaching above purpose, technical scheme of the present invention is as follows:
Solar cell backboard of the present invention (being also referred to as the solar cell backboard film, solar energy backboard, or composite membrane) comprises outer weathering layer, barrier layer, structure enhancement layer, interior weathering layer and tack coat successively; Described outer weathering layer is the fluorine film; The material of described barrier layer is polyvinylidene chloride (PVDC) or ethylene/vinyl alcohol copolymer (EVOH); The material of described structure enhancement layer and interior weathering layer comprises PETG (PET); Described tack coat is polyvinyl butyral resin (PVB) or ethylene-vinyl acetate copolymer (EVA).Further, the material of described structure enhancement layer and interior weathering layer is identical.Further, the material of described structure enhancement 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 ° of C, 2.16kg).Vinyl acetate content is higher, or the higher five-layer co-squeezing one-step preparation process that is unfavorable for of melt index, weathering layer outside can adhering in wrapup procedure easily; Vinyl acetate content is lower, or low its caking property variation that can make again of melt index.
Described solar cell backboard thickness is 280-400 μ m, and the thickness of its China and foreign countries' weathering layer, barrier layer, structure enhancement layer, interior weathering layer and tack coat accounts for 10-20%, 5-10%, 50-70%, 10-20% and the 5-10% of solar cell backboard thickness respectively.
Further, described solar cell backboard is the five-layer co-squeezing structure.
Further, described outer weathering layer material comprises a kind of of polyvinyl fluoride (PVF), Kynoar (PVDF); Described structure enhancement layer material comprises PET section, 1-10% inorganic particulate and the 1-5% chain extender of 85-98%.The percentage composition of described material is weight percentage.Wherein the intrinsic viscosity of PET section is 0.6-0.8dL/g, and inorganic particulate is selected from barium sulfate, titanium dioxide or its combination; Described chain extender is selected from the epoxy type polymer.
Further, described interior weathering layer material comprises the PET section of 90-99% and the hydrolysis agent of 1%-10%.Wherein the intrinsic viscosity of PET section is 0.8-1.2dL/g, and described hydrolysis agent is selected from carbodiimides type polymer.
Described barium sulfate particle diameter is 0.5-2 μ m, and the titanium dioxide particle diameter is 0.3-0.5 μ m.Described chain extender is a kind of in tetraglycidel ether epoxy resin or the maleic anhydride graft epoxy resin.Described hydrolysis agent is a kind of in haplotype carbodiimides or the aggretion type carbodiimides.
Further, described outer weathering layer is PVF or PVDF, and the thickness of described outer weathering layer accounts for the 10-20% of solar cell backboard thickness; The material of described barrier layer is PVDC or EVOH, and the thickness of described barrier layer accounts for the 5-10% of solar cell backboard thickness; The material of described structure enhancement layer comprises 85-98%PET, 1-10% barium sulfate, titanium dioxide or its combination and 1-5% chain extender, and the thickness of described structure enhancement layer accounts for the 50-70% of solar cell backboard thickness; The material of weathering layer comprises the hydrolysis agent of 90-99%PET section and 1-10% in described, and the thickness of described interior weathering layer accounts for the 10-20% of solar cell backboard thickness; Described tack coat is PVB or EVA, and the thickness of described tack coat accounts for the 5-10% of solar cell backboard thickness.
Further, described outer weathering layer is PVF or pvdf membrane, accounts for the 10-15% of solar cell backboard thickness; The material of described barrier layer is PVDC or EVOH, accounts for the 5-10% of solar cell backboard thickness; The material of described structure enhancement layer comprises 88-95%PET, and 3-8% barium sulfate, titanium dioxide or its combination and 2-4% chain extender account for the 50-60% of solar cell backboard thickness; The material of weathering layer comprises the hydrolysis agent of 92-98%PET section and 2-8% in described, 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) carries out fusion plastification respectively simultaneously with the raw material of each layer, plastifies good melt and enters the curtain coating mould by distributor and extrude the composite membrane that forms the fusion of no interface; Processing temperature 180-220 ℃ of extruder of its China and foreign countries' weathering layer, the processing temperature 180-200 of the extruder of barrier layer ℃, the processing temperature of the extruder of structure enhancement layer is 250-280 ℃, the processing temperature of the extruder of interior weathering layer is 250-280 ℃, and the processing temperature of the extruder of tack coat is 120-180 ℃.Above-mentioned extruder is five extruders, and the raw material of each layer comprises single raw material and raw materials mixed.(2) 80-140 ℃ of online high-temperature shaping 2min of five layers of composite membranes process that extrudes from mould, cooling, rolling.
Compared with prior art, the interior weathering layer of the non-fluorine polyester-type of the present invention can well be protected environment not influencing under the weather resistance prerequisite of backboard; And reduce the use amount of fluorine material in backboard, reached the purpose that reduces cost.The present invention makes backboard have better comprehensive performance by selection and optimization to solar cell backboard layers of material and component proportioning.The tack coat of solar cell backboard provided by the invention (also claiming adhesive layer) can with the solar energy encapsulating material in PUR well be bonded together, make the solar energy backboard play lasting protective effect.The present invention directly prepares solar cell backboard by multi-layer co-extruded technology, simplified successively compound process route, easy operating.
Description of 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 the structure enhancement layer, and 4 is interior weathering layer, and 5 is tack coat.
Embodiment
The used material and facility of the present invention 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, structure enhancement layer 3, interior weathering layer 4 and tack coat 5; Described outer weathering layer 1 is the fluorine film; The material of described barrier layer 2 is polyvinylidene chloride or ethylene/vinyl alcohol copolymer; The material of described structure enhancement layer 3 and interior weathering layer 4 comprises PETG; Described tack coat 5 is polyvinyl butyral resin or ethylene-vinyl acetate copolymer.
The preparation method of solar cell backboard provided by the invention comprises the steps:
(1) mixed material with each layer carries out fusion plastification simultaneously respectively, plastifies good melt and enters the curtain coating mould by distributor and extrude the composite membrane that forms the fusion of no interface; The processing temperature of the extruder of its China and foreign countries' weathering layer is 180-220 ℃, the processing temperature of the extruder of barrier layer is 180-200 ℃, the processing temperature of the extruder of structure enhancement layer is 250-280 ℃, the processing temperature of the extruder of interior weathering layer is 250-280 ℃, and the processing temperature of the extruder of tack coat is 120-180 ℃; Control the thickness of each layer by the bore of mould.
(2) 80-140 ℃ of online high-temperature shaping 2min of five layers of composite membranes process that extrudes from mould, cooling, rolling.
The testing standard of every performance of the prepared solar cell backboard of the present invention is as follows:
Hot strength and elongation at break: according to the GB/T1040-2006 standard, the INSTRON universal testing machine that adopts U.S. Instron company to produce, the hot strength of testing backboard and elongation at break.
Peel strength: according to the GB/T2790-1995 standard testing.
Moisture-vapor transmission: according to the GB/T26253-2001 standard testing, adopt TSY-W2 moisture-vapor transmission tester that backboard is tested.
The weatherability test: the PCT test is commonly referred to as pressure cooker cooking test or saturated steam test, and sample, was placed 60 hours, afterwards the elongation at break of specimen under the 100% relative humidity environment at 121 ℃.
Two 85 experiments refer to sample at 85 ℃, under the 85% relative humidity environment, placed 2000 hours, and the LAB value of specimen afterwards, wherein b value represent the blue yellow coloured silk variation of arriving.
Puncture voltage test: according to the GB/T13542.2-2009 standard testing, adopt the breakdown strength tester that backboard is tested.
Partial discharge is pressed test: according to the IEC60664-1-2007 standard testing, adopt GYJF-II instrument for measuring partial discharge to test.
Material content percentage among the following embodiment is weight percentage.
Prepare solar cell backboard according to the method described above, gross thickness is 330 μ m.Described outer weathering layer accounts for composite membrane (namely, solar cell backboard) 10% of thickness, barrier layer accounts for 8% of composite membrane gross thickness, and the structure enhancement layer accounts for 62% of composite membrane gross thickness, 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 the PVF film; Described barrier layer is the PVDC film; Described structure enhancement layer comprises 88% PET section, and inherent viscosity is 0.7dL/g, and 9% barium sulfate particle, particle diameter are 1 μ m, 3% epoxy polymer; Weathering layer comprises 95% PET section, 5% haplotype carbodiimides in described; Described tack coat is the PVB film.Gained backboard correlated performance sees Table 1.
Prepare solar cell backboard according to the method described above, gross thickness is 330 μ m.Described outer weathering layer accounts for 12% of composite membrane thickness, and barrier layer accounts for 7% of composite membrane gross thickness, and the structure enhancement layer accounts for 58% of composite membrane gross thickness, and 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 the PVF film; Described barrier layer is the PVDC film; Described structure enhancement layer comprises 90% PET section, and inherent viscosity is 0.7dL/g, and 6% barium sulfate particle, particle diameter are 1.5 μ m, 4% epoxy polymer; Weathering layer comprises 95% PET section, 5% haplotype carbodiimides in described; Described tack coat is the PVB film.Gained backboard correlated performance sees Table 1.
Prepare solar cell backboard according to the method described above, gross thickness is 350 μ m.Described outer weathering layer accounts for 15% of composite membrane thickness, and barrier layer accounts for 5% of composite membrane gross thickness, and the structure enhancement layer accounts for 63% of composite membrane gross thickness, and 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 the PVDC film; Described structure enhancement layer comprises 91% PET section, and inherent viscosity is 0.7dL/g, and 5% TiO 2 particles, particle diameter are 0.3 μ m, 4% epoxy polymer; Weathering layer comprises 95% PET section, 5% polycarbodiimide in described; Described tack coat is eva film.Gained backboard correlated performance sees Table 1.
Prepare solar cell backboard according to the method described above, gross thickness is 340 μ m.Described outer weathering layer accounts for 18% of composite membrane thickness, and barrier layer accounts for 8% of composite membrane gross thickness, and the structure enhancement layer accounts for 50% of composite membrane gross thickness, and 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 the PVDC film; Described structure enhancement layer comprises 93% PET section, and inherent viscosity is 0.8dL/g, and 4% TiO 2 particles, particle diameter are 0.3 μ m, 3% epoxy polymer; Weathering layer comprises 97% PET section, 3% polycarbodiimide in described; Described tack coat is eva film.Gained backboard correlated performance sees Table 1.
Prepare solar cell backboard according to the method described above, gross thickness is 360 μ m.Described outer weathering layer accounts for 14% of composite membrane thickness, and barrier layer accounts for 6% of composite membrane gross thickness, and the structure enhancement layer accounts for 61% of composite membrane gross thickness, and 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 the PVDC film; Described structure enhancement layer comprises 95% PET section, and inherent viscosity is 0.75dL/g, and 3% TiO 2 particles, particle diameter are 0.3 μ m, 2% epoxy polymer; Weathering layer comprises 96% PET section, 4% polycarbodiimide in described; Described tack coat is eva film.Gained backboard correlated performance sees Table 1.
Table 1 embodiment 1-5 gained solar cell backboard performance test table
Embodiment 6
Prepare solar cell backboard according to the method described above, gross thickness is 280 μ m.Described outer weathering layer accounts for 10% of composite membrane thickness, and barrier layer accounts for 5% of composite membrane gross thickness, and the structure enhancement layer accounts for 70% of composite membrane gross thickness, and 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 the PVF film; Described barrier layer is the PVDC film; Described structure enhancement layer comprises 85% PET section, and inherent viscosity is 0.7dL/g, 10% barium sulfate and the combination of TiO 2 particles (weight ratio is 1:1), and particle diameter is 1 μ m, 5% epoxy polymer; Weathering layer comprises 95% PET section, 5% haplotype carbodiimides in described; Described tack coat is the PVB film.Gained backboard correlated performance sees Table 2.
Embodiment 7
Prepare solar cell backboard according to the method described above, gross thickness is 400 μ m.Described outer weathering layer accounts for 15% of composite membrane thickness, and barrier layer accounts for 10% of composite membrane gross thickness, and the structure enhancement layer accounts for 50% of composite membrane gross thickness, and 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 the EVOH film; Described structure enhancement layer comprises 95% PET section, and inherent viscosity is 0.8dL/g, and 3% barium sulfate particle, particle diameter are 1.5 μ m, 2% epoxy polymer; Weathering layer comprises 99% PET section, 1% haplotype carbodiimides in described; Described tack coat is the PVB film.Gained backboard correlated performance sees Table 2.
Embodiment 8
Prepare solar cell backboard according to the method described above, gross thickness is 300 μ m.Described outer weathering layer accounts for 20% of composite membrane thickness, and barrier layer accounts for 7% of composite membrane gross thickness, and the structure enhancement layer accounts for 53% of composite membrane gross thickness, and 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 the PVF film; Described barrier layer is the PVDC film; Described structure enhancement layer comprises 98% PET section, and inherent viscosity is 1.2dL/g, and 1% TiO 2 particles, particle diameter are 0.3 μ m, 1% epoxy polymer; Weathering layer comprises 90% PET section, 10% polycarbodiimide in described; Described tack coat is the PVB film.Gained backboard correlated performance sees Table 2.
Embodiment 9
Prepare solar cell backboard according to the method described above, gross thickness is 340 μ m.Described outer weathering layer accounts for 12% of composite membrane thickness, and barrier layer accounts for 8% of composite membrane gross thickness, and the structure enhancement layer accounts for 55% of composite membrane gross thickness, and 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 the EVOH film; Described structure enhancement layer comprises 88% PET section, and inherent viscosity is 0.8dL/g, and 8% barium sulfate particle, particle diameter are 1.3 μ m, 4% epoxy polymer; Weathering layer comprises 98% PET section, 2% polycarbodiimide in described; Described tack coat is eva film.Gained backboard correlated performance sees Table 2.
Embodiment 10
Prepare solar cell backboard according to the method described above, gross thickness is 360 μ m.Described outer weathering layer accounts for 15% of composite membrane thickness, and barrier layer accounts for 5% of composite membrane gross thickness, and the structure enhancement layer accounts for 60% of composite membrane gross thickness, and 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 the PVF film; Described barrier layer is the PVDC film; Described structure enhancement layer comprises 95% PET section, and inherent viscosity is 0.75dL/g, and 3% TiO 2 particles, particle diameter are 0.3 μ m, 2% epoxy polymer; Weathering layer comprises 92% PET section, 8% polycarbodiimide in described; Described tack coat is eva film.Gained backboard correlated performance sees Table 2.
Table 2 embodiment 6-10 gained solar cell backboard performance test table
Embodiment 11
Prepare solar cell backboard according to the method described above, gross thickness is 380 μ m.Described outer weathering layer accounts for 10% of composite membrane thickness, and barrier layer accounts for 10% of composite membrane gross thickness, and the structure enhancement layer accounts for 55% of composite membrane gross thickness, and 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 the PVF film; Described barrier layer is the PVDC film; Described structure enhancement layer comprises 88% PET section, and inherent viscosity is 0.7dL/g, 8% barium sulfate and the combination of TiO 2 particles (weight ratio is 1:1), and particle diameter is 1 μ m, 4% epoxy polymer; Weathering layer comprises 95% PET section, 5% haplotype carbodiimides in described; Described tack coat is eva film.Gained backboard correlated performance sees Table 3.
Embodiment 12
Prepare solar cell backboard according to the method described above, gross thickness is 300 μ m.Described outer weathering layer accounts for 10% of composite membrane thickness, and barrier layer accounts for 5% of composite membrane gross thickness, and the structure enhancement layer accounts for 60% of composite membrane gross thickness, and 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 the EVOH film; Described structure enhancement layer comprises 90% PET section, and inherent viscosity is 0.7dL/g, and 6% barium sulfate particle, particle diameter are 1.5 μ m, 4% epoxy polymer; Weathering layer comprises 96% PET section, 4% haplotype carbodiimides in described; Described tack coat is eva film.Gained backboard correlated performance sees Table 3.
Embodiment 13
Prepare solar cell backboard according to the method described above, gross thickness is 310 μ m.Described outer weathering layer accounts for 13% of composite membrane thickness, and barrier layer accounts for 7% of composite membrane gross thickness, and the structure enhancement layer accounts for 60% of composite membrane gross thickness, and 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 the PVF film; Described barrier layer is the PVDC film; Described structure enhancement layer comprises 96% PET section, and inherent viscosity is 1.0dL/g, and 3% TiO 2 particles, particle diameter are 0.3 μ m, 1% epoxy polymer; Weathering layer comprises 93% PET section, 7% polycarbodiimide in described; Described tack coat is eva film.Gained backboard correlated performance sees Table 3.
Embodiment 14
Prepare solar cell backboard according to the method described above, gross thickness is 340 μ m.Described outer weathering layer accounts for 15% of composite membrane thickness, and barrier layer accounts for 10% of composite membrane gross thickness, and the structure enhancement layer accounts for 50% of composite membrane gross thickness, and 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 the EVOH film; Described structure enhancement layer comprises 92% PET section, and inherent viscosity is 0.8dL/g, and 6% barium sulfate particle, particle diameter are 1.3 μ m, 2% epoxy polymer; Weathering layer comprises 97% PET section, 3% polycarbodiimide in described; Described tack coat is eva film.Gained backboard correlated performance sees Table 3.
Embodiment 15
Prepare solar cell backboard according to the method described above, gross thickness is 360 μ m.Described outer weathering layer accounts for 14% of composite membrane thickness, and barrier layer accounts for 6% of composite membrane gross thickness, and the structure enhancement layer accounts for 55% of composite membrane gross thickness, and 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 the PVF film; Described barrier layer is the PVDC film; Described structure enhancement layer comprises 95% PET section, and inherent viscosity is 0.75dL/g, and 3% TiO 2 particles, particle diameter are 0.3 μ m, 2% epoxy polymer; Weathering layer comprises 92% PET section, 8% polycarbodiimide in described; Described tack coat is eva film.Gained backboard correlated performance sees Table 3.
Table 3 embodiment 11-15 gained solar cell backboard performance test table
Comparative Examples 1
Prepare solar cell backboard according to the method described above, gained back plate thickness and layers of material are as described in the embodiment 1, and different is that barrier material is selected polyamide (PA) for use.Correlated performance sees Table 4.
Comparative Examples 2
Prepare solar cell backboard according to the method described above, gained back plate thickness and layers of material be as described in the embodiment 2, and different is, structure enhancement layer and interior weathering layer material selection polypropylene (PP), and correlated performance sees Table 4.
Comparative Examples 3
Prepare solar cell backboard according to the method described above, gained back plate thickness and layers of material be as described in the embodiment 3, and different is, bonding layer material is selected polyethyl methacrylate for use, and correlated performance sees Table 4.
Comparative Examples 4
Preparation solar cell backboard, gained back plate thickness and layers of material be as described in the embodiment 4, each layer of backboard by the hot pressing compoiste adhering together, correlated performance sees Table 4.
Table 4 Comparative Examples 1-5 gained solar cell backboard performance test table
To the table 4 shown in the performance test data, the present invention makes backboard have better weather energy and mechanical property by selection and optimization to solar cell backboard layers of material and component proportioning as table 1; The adhesive layer of solar cell backboard provided by the invention can with the solar energy encapsulating material in PUR well be bonded together; make the solar energy backboard play lasting protective effect; and solar cell backboard adopts the five-layer co-squeezing one step technique; simplified successively compound process route, easy operating.
The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.Every equalization that content is done according to the present invention changes and modifies, and all is encompassed in the claim of the present invention.
Claims (10)
1. a solar cell backboard is characterized in that, described solar cell backboard comprises outer weathering layer successively, barrier layer, structure enhancement layer, interior weathering layer and tack coat; Described outer weathering layer is the fluorine film; The material of described barrier layer is polyvinylidene chloride or ethylene/vinyl alcohol copolymer; The material of described structure enhancement layer and interior weathering layer comprises PETG; Described tack coat is polyvinyl butyral resin or ethylene-vinyl acetate copolymer.
2. solar cell backboard according to claim 1, it is characterized in that, described solar cell backboard thickness is 280-400 μ m, and the thickness of its China and foreign countries' weathering layer, barrier layer, structure enhancement layer, interior weathering layer and tack coat accounts for 10-20%, 5-10%, 50-70%, 10-20% and the 5-10% of solar cell backboard thickness respectively.
3. solar cell backboard according to claim 1 is characterized in that, described solar cell backboard is the five-layer co-squeezing structure.
4. solar cell backboard according to claim 1 is characterized in that, described outer weathering layer material comprises a kind of in polyvinyl fluoride (PVF) or the Kynoar (PVDF).
5. solar cell backboard according to claim 1 is characterized in that, described structure enhancement layer material comprises PET section, 1-10% inorganic particulate and the 1-5% chain extender of 85-98%.
6. solar cell backboard according to claim 1 is characterized in that, described interior weathering layer material comprises the PET section of 90-99% and the hydrolysis agent of 1%-10%.
7. solar cell backboard according to claim 1 is characterized in that, described bonding layer material is ethylene-vinyl acetate copolymer, wherein, and vinyl acetate content≤14%.
8. solar cell backboard according to claim 1 is characterized in that, described outer weathering layer is PVF or PVDF, and the thickness of described outer weathering layer accounts for the 10-20% of solar cell backboard thickness; The material of described barrier layer is PVDC or EVOH, and the thickness of described barrier layer accounts for the 5-10% of solar cell backboard thickness; The material of described structure enhancement layer comprises 85-98%PET, the barium sulfate of 1-10%, titanium dioxide or its combination and 1-5% chain extender, and the thickness of described structure enhancement layer accounts for the 50-70% of solar cell backboard thickness; The material of weathering layer comprises the hydrolysis agent of 90-99%PET section and 1-10% in described, and the thickness of described interior weathering layer accounts for the 10-20% of solar cell backboard thickness; Described tack coat is PVB or EVA, and the thickness of described tack coat accounts for the 5-10% of solar cell backboard thickness.
9. solar cell backboard according to claim 1 is characterized in that, described outer weathering layer is PVF or pvdf membrane, accounts for the 10-15% of solar cell backboard thickness; The material of described barrier layer is PVDC or EVOH, accounts for the 5-10% of solar cell backboard thickness; The material of described structure enhancement layer comprises 88-95%PET, and 3-8% barium sulfate, titanium dioxide or its combination and 2-4% chain extender account for the 50-60% of solar cell backboard thickness; The material of weathering layer comprises the hydrolysis agent of 92-98%PET section and 2-8% in described, 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.
10. according to the preparation method of one of claim 1-9 described solar cell backboard, it is characterized in that described preparation method is as follows:
(1) raw material with each layer carries out fusion plastification simultaneously respectively, plastifies good melt and enters the curtain coating mould by distributor and extrude the composite membrane that forms the fusion of no interface; The extruder processing temperature of its China and foreign countries' weathering layer is 180-220 ℃, the extruder processing temperature of barrier layer is 180-200 ℃, the extruder processing temperature of structure enhancement layer is 250-280 ℃, the extruder processing temperature of interior weathering layer is 250-280 ℃, and the extruder processing temperature of tack coat is 120-180 ℃;
(2) 80-140 ℃ of online high-temperature shaping 2min of five layers of composite membranes process that extrudes from mould, cooling, rolling.
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| CN103660493A (en) * | 2013-12-09 | 2014-03-26 | 苏州中来光伏新材股份有限公司 | VPF backplane for solar cell and processing process thereof |
| CN104494263A (en) * | 2014-12-25 | 2015-04-08 | 杭州福斯特光伏材料股份有限公司 | High-partial-discharge-voltage photovoltaic backplane |
| CN105762215A (en) * | 2016-04-13 | 2016-07-13 | 黄广明 | Monocrystalline silicon solar cell module |
| CN105870236A (en) * | 2016-04-13 | 2016-08-17 | 黄广明 | Poly-silicon photovoltaic cell panel |
| CN106057943A (en) * | 2016-07-25 | 2016-10-26 | 无锡中洁能源技术有限公司 | Good weather resistance solar cell backboard |
| CN106967241A (en) * | 2016-11-15 | 2017-07-21 | 常州大学 | A kind of night can generate electricity Freon-free flame-retardant solar cell backboard and preparation method thereof |
| CN109860322A (en) * | 2019-01-17 | 2019-06-07 | 杭州福禧新材料有限公司 | Five-layer structure co-extrusion solar cell backboard containing PBT and preparation method thereof |
| CN113471318A (en) * | 2021-07-01 | 2021-10-01 | 浙江中聚材料有限公司 | Solar backboard with high barrier property |
| CN114864719A (en) * | 2022-04-13 | 2022-08-05 | 浙江合特光电有限公司 | High-weather-resistance and high-water-vapor-resistance separation type solar cell back plate and preparation method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103660493A (en) * | 2013-12-09 | 2014-03-26 | 苏州中来光伏新材股份有限公司 | VPF backplane for solar cell and processing process thereof |
| CN104494263A (en) * | 2014-12-25 | 2015-04-08 | 杭州福斯特光伏材料股份有限公司 | High-partial-discharge-voltage photovoltaic backplane |
| CN105762215A (en) * | 2016-04-13 | 2016-07-13 | 黄广明 | Monocrystalline silicon solar cell module |
| CN105870236A (en) * | 2016-04-13 | 2016-08-17 | 黄广明 | Poly-silicon photovoltaic cell panel |
| CN106057943A (en) * | 2016-07-25 | 2016-10-26 | 无锡中洁能源技术有限公司 | Good weather resistance solar cell backboard |
| CN106967241A (en) * | 2016-11-15 | 2017-07-21 | 常州大学 | A kind of night can generate electricity Freon-free flame-retardant solar cell backboard and preparation method thereof |
| CN109860322A (en) * | 2019-01-17 | 2019-06-07 | 杭州福禧新材料有限公司 | Five-layer structure co-extrusion solar cell backboard containing PBT and preparation method thereof |
| CN113471318A (en) * | 2021-07-01 | 2021-10-01 | 浙江中聚材料有限公司 | Solar backboard with high barrier property |
| CN114864719A (en) * | 2022-04-13 | 2022-08-05 | 浙江合特光电有限公司 | High-weather-resistance and high-water-vapor-resistance separation type solar cell back plate and preparation method thereof |
| CN114864719B (en) * | 2022-04-13 | 2024-03-12 | 浙江合特光电有限公司 | Solar cell backboard with high weather resistance and high water vapor barrier property and preparation method thereof |
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