CN103709953B - A kind of polymer-coated epithelium and the solar cell backboard containing this polymer-coated epithelium - Google Patents
A kind of polymer-coated epithelium and the solar cell backboard containing this polymer-coated epithelium Download PDFInfo
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- CN103709953B CN103709953B CN201410016018.0A CN201410016018A CN103709953B CN 103709953 B CN103709953 B CN 103709953B CN 201410016018 A CN201410016018 A CN 201410016018A CN 103709953 B CN103709953 B CN 103709953B
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- 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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Abstract
The present invention relates to a kind of polymer-coated epithelium, this polymer-coated epithelium is the epithelium formed by coated polymer layer on dielectric film, described polymeric layer includes polymeric matrix, firming agent and additive composition, described polymeric matrix is the combination of one or more in fluoropolymer, PEPA, epoxy resin, acrylic resin, polyamide, and described firming agent is isocyanates firming agent or amino resin curing agents。The invention still further relates to a kind of solar cell backboard using this polymer-coated epithelium as EVA adhesive surface, it has four-layer structure, including the weather resistant polymer rete being combined with each other successively, macromolecular adhesive layer, base layer and be positioned at inside base layer weather resistant polymer coating epithelium。Solar cell backboard of the present invention has good weatherability, and assembly reprocesses performance, high reflective function, well heat transfer efficiency, excellent fireproof performance, has relatively low cost simultaneously。
Description
Technical field
The present invention relates to a kind of polymer-coated epithelium and the solar cell backboard containing this polymer-coated epithelium。
Background technology
Solar panel is usually a laminated construction, mainly includes glassy layer, EVA encapsulated layer, cell piece, EVA encapsulated layer and solar cell backboard, and wherein silicon chip is by two-layer EVA adhesive film sealed envelope。Described silicon chip must the protected impact with isolated environment, for instance moisture, ultraviolet light etc.。Solar cell backboard Main Function is the mechanical strength improving solar panel, it is prevented that because the impact of silicon chip is reduced life-span and the generating efficiency of cell piece by environment。Owing to solar cell backboard is at the outermost of solar panel, require that backboard has good environment resistant aggressivity, thus the solar cell backboard manufactured must have good wet and heat ageing resistant, high temperature resistant, hydrolysis, decay resistance and resist light irradiation ability。In prior art, solar cell backboard is mainly composited by adhesive by trilamellar membrane material: the fluorine-contained film that 0.02-0.03mm is thick；The PET basic unit that 0.18-0.30mm is thick；The EVA of 0.025-0.1mm thickness or polyolefin skin membrane, Adhesive thickness is 5 μm～30 μm, amounts to 5 layer materials and constitutes solar energy backboards。Above-mentioned backboard has the disadvantages that the thicker heat transfer efficiency of backboard is poor, and reflecting rate is low affects cell power generation efficiency, and it is poor that assembly reprocesses difficulty, EVA or polyolefin skin membrane long-term ageing weatherability。
Summary of the invention
For solving above-mentioned technical problem, present invention aim at providing a kind of polymer-coated epithelium that can be used for solar cell backboard, this polymer-coated epithelium makes solar cell backboard thermal conductivity height, reflecting rate is high, assembly is reprocessed easily, resisting ageing for long time performance is good。
The present invention also provides for a kind of solar cell backboard simultaneously。
For reaching above-mentioned purpose, technical scheme is as follows:
A kind of polymer-coated epithelium is adopted to replace the EVA of solar cell backboard or polyolefin film layer or PVDF layer or adhesive layer, and using this polymer-coated epithelium as interior adhesive linkage backboard used for encapsulation of solar battery。It mainly has four-layer structure, is respectively as follows: weather resistant polymer rete, macromolecular adhesive layer, base layer and is positioned at the weather resistant polymer coating skin membrane of (close cell piece) inside described base layer。
The thickness of described polymer-coated skin membrane is 1 μm～30 μm；
Described polymer-coated skin membrane is the polymer-coated epithelium of the present invention, it it is the epithelium formed by coated polymer layer on dielectric film, described polymeric layer is formed by polymeric matrix and firming agent hot setting, the inside has been also added with additive, and described polymeric matrix is containing the combination of one or more in the fluoropolymer of curing type functional group, PEPA, epoxy resin, acrylic resin, polyamide。
Described fluoropolymer is politef system fluorine resin or polytrifluorochloroethylene system resin or Kynoar system resin or polyvinyl fluoride system resin；Described curing type functional group is hydroxyl or carboxyl or amino。Preferably, described fluoropolymer is hydroxyl polyflon or hydroxyl daiflon。
Described firming agent is isocyanate curing agent or amino resin curing agents。
Described additive includes firming agent accelerator, hydrolysis auxiliary agent, coupling agent etc.。
The thickness of described base layer is 0.01mm～2mm。
Described base layer is the one in PEN (PEN) layer, polyethylene terephthalate (PET) layer, polybutylene terephthalate (PBT) (PBT) layer。
Described base layer surface is all through sided corona treatment。
The thickness of described macromolecular adhesive layer is 1 μm～30 μm。
Described macromolecular adhesive layer is that the mixture of one or more in adhesive for polyurethane, acrylic resin adhesive, epoxyn is constituted。
The thickness of described weather resistant polymer rete is 5 μm～200 μm。
Described weather resistant polymer rete is the one in polyvinyl fluoride layer, polyvinylidene fluoride layer, tetrafluoroethylene-ethylene copolymer layer, weatherability polyethylene terephthalate (PET) layer, tetrafluoroethene and ethylene copolymer layer。
Due to the enforcement of technique scheme, the present invention compared with prior art has the advantage that
The polymer-coated epithelium of the present invention has good adhesive property。The polymer-coated epithelium of the employing present invention has high heat transfer efficiency, high light reflection efficiency as the solar cell backboard of interior tack coat, and reprocessing of solar cell backboard becomes different and good weather resistance。
Accompanying drawing explanation
Fig. 1 is the structural representation of solar cell backboard of the present invention；
The corresponding component title that in figure, numeral is represented is respectively as follows:
1, base layer；2, weather resistant polymer rete；3, polymer-coated skin membrane；4, macromolecular adhesive layer。
Fig. 2 is solar cell backboard of the present invention and cell piece laminar structure schematic diagram；
The corresponding component title that in figure, numeral is represented is respectively as follows:
1, base layer；2, weather resistant polymer rete；3, polymer-coated skin membrane；4, macromolecular adhesive layer；5, EVA encapsulated layer；6, cell piece；7, glassy layer。
Detailed description of the invention
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is illustrated。
A kind of polymer-coated epithelium of implementing according to the present invention and shown in Figure 1 as interior adhesive linkage backboard used for encapsulation of solar battery containing this polymer-coated epithelium, it is four-layer structure, including the weather resistant polymer rete 2 being combined with each other successively, macromolecular adhesive layer 4, base layer 1 and be positioned at inside base layer 1 weather resistant polymer coating skin membrane 3；Described solar cell backboard has good adhesive property, high heat transfer efficiency, high light reflection efficiency, and assembly is reprocessed and become different and good weather resistance。
In above-described embodiment that the present invention provides, described weather resistant polymer coating skin membrane 3 makes solar cell backboard have high reflecting rate, high thermal conductivity, makes assembly be prone to reprocess and have better weather resistance simultaneously。
In above-described embodiment that the present invention provides, the described polymer-coated epithelium that weather resistant polymer coating skin membrane 3 is the present invention, described polymer-coated epithelium is the epithelium formed by coated polymer layer on dielectric film, and described polymeric layer is formed by polymeric matrix, firming agent hot setting。Possibly together with the additive such as inorganic filler, auxiliary agent in described polymeric layer。By weight percentage, described polymeric layer include the polymeric matrix of 15%～90%, the firming agent of 5%～25% and 5%～60% additive。
The thickness of weather resistant polymer of the present invention coating skin membrane 3 is 1 μm～30 μm, it is preferable that thickness is 1 μm～15 μm, and concrete thickness can be 2 μm, 3 μm, 5 μm；
Described polymeric matrix is the combination of one or more in fluoropolymer, PEPA, epoxy resin, acrylic resin, polyamide, wherein said fluoropolymer is the politef system resin containing curing type functional group or polytrifluorochloroethylene system resin, as containing functional groups such as hydroxyl, carboxyl, amino, it is preferred to hydroxyl polyflon or hydroxyl daiflon。
Firming agent may be selected to be isocyanate curing agent or amino resin curing agents。
Isocyanates firming agent includes: hexamethylene diisocyanate (HDI) and dimer, trimer, MDI (MDI), 3-isocyanates methylene-3,5,5-trimethylcyclohexylisocyanate (IPDI) and dimer, trimer, toluene di-isocyanate(TDI) (TDI), dimer (fatty acid) yl isocyanates (DDI) and dimer, trimer；Preferred hexamethylene diisocyanate (HDI) and dimer, trimer and 3-isocyanates methylene-3,5,5-trimethylcyclohexylisocyanate (IPDI) and dimer, trimer, dimer (fatty acid) yl isocyanates (DDI) and dimer, trimer；More preferably hexamethylene diisocyanate (HDI) and dimer, trimer, dimer (fatty acid) yl isocyanates (DDI) and dimer, trimer；It most preferably is XDI (XDI), cyclohexanedimethyleterephthalate diisocyanate (HXDI), hydrogenation of benzene dicyclohexylmethane diisocyanate (H12MDI), 1,3-Diisocyanatomethylcyclohexane (HTDI), PPDI (PPDI)。
Amino resin curing agents has generally comprised Lauxite, melamine resin and aniline-formaldehyde resin etc.。
The quality of fluoropolymer described in described polymeric layer accounts for the 10%～90% of described polymeric matrix gross mass, it is preferred to 40%～60%。
Containing inorganic filler in the additive of weather resistant polymer of the present invention coating skin membrane 3 so that described polymer-coated epithelium has the visible reflectance feature of more than 80%。Inorganic filler can be the composition of one or more in titanium dioxide, silicon dioxide, aluminium sesquioxide, zirconium oxide, barium sulfate, calcium carbonate, zinc oxide, the wherein preferably combination of one or more in titanium dioxide, silicon dioxide, aluminium sesquioxide, zirconium oxide, more preferably titanium dioxide, one or both combination in aluminium sesquioxide。
The particle diameter of described inorganic filler is 5nm～10 μm, it is preferred to 10nm～3 μm。
The content of described inorganic filler accounts for 10%～90%(of described additive gross mass in mass), it is preferred to 40%～60%。
In described additive, additionally also comprise the additives such as firming agent accelerator, stabilizer against hydrolysis and coupling agent。
In described additive containing mass content be as described in additive gross mass 1%～50% tabular crystallinity montmorillonite, Muscovitum, Anhydrite, zeolite, the mixture of one or more in Talcum so that the water vapour permeability of described polymer-coated epithelium is at 2g/ (m2 day) below。
In described additive containing mass content be as described in additive gross mass 0.5%～80% boron nitride, aluminium nitride, aluminium oxide, silicon oxide, titanium dioxide, zirconium oxide, the mixture of one or more in carborundum inorganic particulate so that the thermal resistance of described polymer-coated epithelium 3 is at 70 DEG C/below W。
In described additive containing mass content be as described in additive gross mass 1%～50% epoxide, one or both mixture in carbodiimide compound so that the wet-heat resisting postadhesion power of described polymer-coated epithelium can be passed through hundred lattice cross-over experiments and reach the level of 0～1 grade。It is preferably epoxide or carbodiimides。
In described additive containing mass content be as described in additive gross mass 2%～10% bloating tendency montmorillonite or bloating tendency quartz or the mixture of the two so that described polymer-coated epithelium has low water transmitance。
Base layer 1 of the present invention is PET basic unit。
Base layer 1 of the present invention, thickness is 0.01mm～2mm, it is preferable that thickness is 0.2mm～0.3mm, and concrete thickness can 188 μm, 250 μm, 255 μm, 300 μm。
Macromolecular adhesive layer 4 of the present invention is polyester adhesive, it is also possible to select acrylic acid adhesive。
Macromolecular adhesive layer 4 of the present invention, thickness is 1 μm～30 μm, it is preferable that thickness is 5 μm～15 μm, and concrete thickness can be 10 μm, 15 μm。
Weather resistant polymer rete 2 of the present invention is polyvinylidene difluoride film, and this layer can be high durable PET film, it is also possible to for tetrafluoroethene and ethylene copolymer films (ETFE) or polyvinyl fluoride thin film (PVF)。
Weather resistant polymer rete 2 of the present invention, thickness is 5 μm～200 μm, it is preferable that thickness is 15 μm～50 μm, and concrete thickness can be 20 μm, 25 μm, 30 μm, 50 μm。
The present embodiment additionally provides an Application Example of the solar cell backboard of this invention, as shown in Figure 2, solar cell backboard and cell piece laminar structure, weather resistant polymer is coated with skin membrane 3 and is pasted on EVA encapsulated layer 5, this laminar structure be specially be combined with each other successively weather resistant polymer rete 2, macromolecular adhesive layer 4, base layer 1, polymer-coated skin membrane 3, EVA encapsulated layer 5, cell piece 6, EVA encapsulated layer 5, glassy layer 7。
Below by specific embodiment, the invention will be further described。
Embodiment 1
With parts by weight, the formula of polymer-coated skin membrane 3 is as follows:
Fluorine resin (GK570, Daikin) 100
Hydroxylated acrylic resin (HypomerFS-1560, the modest chemical industry of Shanghai moral) 7
Firming agent (N3390, Bayer Bitterfeld GmbH) 10
Firming agent (D201, Asahi Chemical Industry) 4
Firming agent accelerator dibutyl tin laurate 0.5
Solvent butyl acetate 50
Titanium dioxide (RD3, Sha Haliben) 50
Muscovitum (the auspicious chemical industry of lattice) 5
Carbodiimides (P200, Rhein chemistry) 7
Coupling agent (KBM303, SHIN-ETSU HANTOTAI's chemistry) 7
The preparation method of polymer-coated skin membrane 3 and solar cell backboard: adopt 250 μ m-thick insulation PET during manufacture, corona is to more than 56dyne, coated polymer coating skin membrane 3 on PET, at 150 DEG C, dry 3-10min, makes the fluoropolymer-coated skin membrane 3 that thickness is about 2 μm, then PVDF fits in the another side of PET, therebetween polyester adhesive is adopted, bondline thickness is 15 μm, prepares described solar cell backboard, and structure is as shown in Figure 1。
Embodiment 2
Polymer-coated skin membrane 3 formula such as embodiment 1。
The manufacture method of the present embodiment solar cell backboard is identical with embodiment 1, and polymer-coated skin membrane thickness is 5 μm。
Embodiment 3
Polymer-coated skin membrane 3 formula such as embodiment 1。
The manufacture method of the present embodiment solar cell backboard is identical with embodiment 1, and polymer-coated skin membrane thickness is 7 μm。
The specific embodiment of the present invention and comparative example are as shown in Table 1。
Table 1 is detailed description of the invention and comparative example table
Results of property is as shown in table 2。
Table 2 is the performance comparison table of embodiment and comparative example
Note: reprocess the maintenance that performance is undesired component
As shown in Table 2, adopting the solar cell backboard of polymer-coated epithelium of the present invention to reprocess performance, reflecting rate, weatherability all good than comparative example, peeling force is less than comparative example。
Above the present invention is described in detail; its object is to allow the personage being familiar with this art will appreciate that present disclosure and to be carried out; can not limit the scope of the invention with this; and the invention is not restricted to the embodiments described; the equivalence that all spirit according to the present invention are made changes or modifies, and all should be encompassed within protection scope of the present invention。
Claims (10)
1. a polymer-coated epithelium, it is characterised in that described polymer-coated epithelium is by comprising
(1) fluororesin containing hydroxyl or amino；
(2) isocyanate-based or amino resin curing agents；And
(3) additive；
Mixture, be coated in selected from PEN, polyethylene terephthalate, polybutylene terephthalate (PBT) insulating properties thin film one side on and the coat film that formed after drying, described additive at least contains epoxide or/and carbodiimide compound。
2. polymer-coated epithelium according to claim 1, it is characterized in that, described additive includes the epoxide of addition is described additive gross weight 1%～50%, one or both the mixture in carbodiimide compound so that the wet-heat resisting postadhesion power of described polymer-coated epithelium can be passed through hundred lattice cross-over experiments and reach the level of 0 ~ 1 grade。
3. polymer-coated epithelium according to claim 1, it is characterized in that, described additive also includes the inorganic filler of addition is described additive gross weight 10% ~ 90%, polymer-coated epithelium is had visible reflectance feature that 80% wavelength above is 400-1100nm, described inorganic filler is one or more in titanium dioxide, silicon dioxide, aluminium sesquioxide, zirconium oxide, barium sulfate, calcium carbonate, zinc oxide。
4. polymer-coated epithelium according to claim 1, it is characterized in that, described additive also include addition is described additive gross weight 0.5%～80% boron nitride, aluminium nitride, aluminium oxide, silicon oxide, titanium dioxide, zirconium oxide, the mixture of one or more in carborundum inorganic particulate so that the thermal resistance of described polymer-coated epithelium is at 70 DEG C/below W。
5. the application in solar cell backboard of the polymer-coated epithelium as described in a claim any one of claim 1 ~ 4。
6. a solar cell backboard, it is characterized in that: the inner side of described solar cell backboard is formed just like the polymer-coated epithelium described in claim any one of Claims 1-4, and described solar cell backboard is bonding with the encapsulated layer of solaode by described polymer-coated epithelium。
7. solar cell backboard according to claim 6, it is characterized in that: described solar cell backboard includes the weather resistant polymer rete, macromolecular adhesive layer, base layer and the polymer-coated skin membrane that are combined with each other successively, wherein, described weather resistant polymer rete is the one in polyvinyl fluoride layer, polyvinylidene fluoride layer, tetrafluoroethylene-ethylene copolymer layer and weatherability polyethylene terephthalate layer；Described macromolecular adhesive layer is that the mixture of one or more in adhesive for polyurethane, acrylic resin adhesive, epoxyn is constituted；Described base layer is the one in PEN layer, polyethylene terephthalate layer, polybutylene terephthalate (PBT) layer, and described polymer-coated skin membrane is made up of described polymer-coated epithelium。
8. solar cell backboard according to claim 7, it is characterised in that: described solar cell backboard is four-layer structure。
9. the solar cell backboard according to claim 7 or 8, it is characterised in that: the thickness of described polymer-coated skin membrane is 1 μm ~ 15 μm。
10. the solar cell backboard according to claim 7 or 8, it is characterized in that: the thickness of described weather resistant polymer rete is 5 μm ~ 200 μm, the thickness of described base layer is 0.01mm ~ 2mm, the thickness of described macromolecular adhesive layer is 1 μm ~ 30 μm, and the thickness of described polymer-coated skin membrane is 1 μm ~ 30 μm。
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| CN201410016018.0A CN103709953B (en) | 2013-11-15 | 2014-01-14 | A kind of polymer-coated epithelium and the solar cell backboard containing this polymer-coated epithelium |
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| CN104465835B (en) * | 2014-11-14 | 2016-11-09 | 国网江西省电力公司赣西供电分公司 | A kind of preparation method of the solar battery back film of acid corrosion-resistant |
| CN104403528A (en) * | 2014-11-14 | 2015-03-11 | 无锡中洁能源技术有限公司 | Antioxidant paint for solar cell backboard and preparation method thereof |
| CN105576063B (en) * | 2015-12-26 | 2017-05-17 | 乐凯胶片股份有限公司 | Solar cell backboard |
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| CN106024942A (en) * | 2016-07-27 | 2016-10-12 | 无锡中洁能源技术有限公司 | Fluorine-containing solar cell backboard |
| CN106024956A (en) * | 2016-07-28 | 2016-10-12 | 无锡中洁能源技术有限公司 | Weather-resistant high-heat-conductivity solar energy backboard |
| CN106206844A (en) * | 2016-07-28 | 2016-12-07 | 无锡中洁能源技术有限公司 | A kind of production technology of weather-proof high thermal conductivity solar energy backboard |
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| CN108365038B (en) * | 2018-02-15 | 2019-12-10 | 湖南辰砾新材料有限公司 | Solar cell back panel film and preparation method thereof |
| CN108707217A (en) * | 2018-05-30 | 2018-10-26 | 苏州中来光伏新材股份有限公司 | Crosslinking agent, the manufacturing method of crosslinking agent and solar cell backboard |
| CN108995194A (en) * | 2018-07-20 | 2018-12-14 | 厦门长塑实业有限公司 | A kind of electrolyte resistance Biaxially orientated polyamide film and preparation method thereof |
| CN111106193A (en) * | 2018-10-26 | 2020-05-05 | 盐城大丰阿特斯阳光电力科技有限公司 | Solar cell module and preparation method thereof |
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| CN110564344A (en) * | 2019-08-29 | 2019-12-13 | 苏州德圣辉新能源科技有限公司 | Solar backboard repairing adhesive and preparation method thereof |
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