CN102637763A - Solar cell backboard with excellent weathering resistance and preparation method thereof - Google Patents
Solar cell backboard with excellent weathering resistance and preparation method thereof Download PDFInfo
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- CN102637763A CN102637763A CN2012101410767A CN201210141076A CN102637763A CN 102637763 A CN102637763 A CN 102637763A CN 2012101410767 A CN2012101410767 A CN 2012101410767A CN 201210141076 A CN201210141076 A CN 201210141076A CN 102637763 A CN102637763 A CN 102637763A
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention discloses a solar cell backboard with excellent weathering resistance and a preparation method for the solar cell backboard. The cell backboard has a five-layer structure which from outside to in side successively comprises an F (fluorine)-containing composite film, a first glue layer, a PET (polyethylene glycol terephthalate) thin film, a second glue layer and a transition layer. According to the solar cell backboard, the F-containing composite film and the transition layer are used for replacing an imported PVDF (polyvinylidene fluoride) film or a PVF (polyvinyl fluoride) film, so that the cost is greatly lowered. Meanwhile, the F-containing composite film can resist such damages as ultraviolet irradiation and the like, the backboard is guaranteed to have excellent weathering resistance, and the backboard and a solar cell assembly are guaranteed to have excellent bonding strength by adoption of the transition layer.
Description
Technical field
The present invention relates to used backboard of a kind of solar module and preparation method thereof.
Background technology
Traditional energy such as coal, oil remains the main energy sources of current society.Yet along with conventional energy resource consumption and global pollution that brings thus and Climatic issues day by day, people have invested regenerative resource with sight, and hope that regenerative resource can change human energy resource structure, to keep human sustainable development.Among this, solar energy forms the focus of paying attention to into people with its exclusive advantage.The mode of human use's solar energy mainly contains at present: light changes hot, light commentaries on classics heat is changeed electricity again, light directly changes electricity (being photovoltaic generation).Wherein photovoltaic generation enjoys favor with the characteristics of its spatter property, fail safe, has obtained significant progress in recent years.National governments all pay much attention to this technological development, and launch subsidy policy one after another and support the research of photovoltaic industry, use and promote.Recent years, global solar photovoltaic installation amount and output were all with about 40% speed increment.In the field, China catches up from behind, and becomes the producing country of the maximum solar module in the whole world in 2009, and has formed the solar energy industry cluster that differs from one another in areas such as the Yangtze River Delta, the ring Bohai Sea, Pearl River Delta, Midwest.
In present various solar cells, the technology of crystal silicon solar energy battery is the most ripe, thereby uses the most extensive.Crystal silicon solar battery component is a sandwich construction, is to be formed by the encapsulation of photic zone, glue-line, battery sheet, glue-line, backboard lamination successively.Wherein, photic zone generally adopts glass, and glue-line adopts the EVA glued membrane usually.Normally a kind of multilayer materials of backboard is an example with the most frequently used TPT backboard, and it is that three layers independently film is hot-forming through the bonding of glue by polyvinyl fluoride/PETG/polyvinyl fluoride.The main effect of solar cell backboard is the overall mechanical strength that is used for improving solar panel, and the protection crystal silicon chip prevents that water vapor permeable from influencing the useful life of battery sheet in the sealant.Because solar cell will reach the useful life in 25 years; Therefore; Backboard must will possess opposing sunlight, rainwater, wind in the so long time, impact and destruction that any extraneous factor such as humiture variation is brought, and protects the silicon chip in the battery.Specifically for performance, backboard must have performances such as high insulation, ageing-resistant, uvioresistant, water vapor rejection and dimensional stability, enough mechanical strength or the like preferably.As parts that are related to solar module safety, backboard is being played the part of more and more important role in photovoltaic industry.
TPT (Tedlar/PET/Tedlar) backboard with commonly used in the market is an example; This backboard outermost layer adopts Tedlar film (PVF; Gather fluorine ethylene); Guaranteed that backboard has good ageing-resistant, uvioresistant performance, middle PET (the gathering para Toluic Acid's glycol ester) film that adopts has guaranteed that backboard has good insulation performance and water vapor rejection performance.Publication number is that the invention of CN201841726U is such structure, and each layer is respectively: polyvinyl fluoride thin film, glue-line, poly terephthalic acid ethylene glycol film, glue-line, polyvinyl fluoride thin film.In addition, can contain fluorine film with other and replace Tedlar film and PET film compound, be pressed into backboard.For example publication number is a kind of five-layer structure of the disclosure of the Invention of CN201387885: upper and lower surfaces is the PVDF material layer, and the intermediate layer is the PET thin layer, more than bond with glue layer between three layers.Since PVF and other fluorine-containing film cost an arm and a leg and output limited, some solar components begin to adopt coating property backboard at present, promptly adopt fluorine resin to be coated on the PET film, form fluorine-containing coat, replace with this and contain fluorine film, thereby greatly reduce cost.Like domestic publication number is that the patent of CN201199525 discloses a kind of seven-layer structure: comprise that the fluorosilicone that is combined with each other successively changes into rete, fluorine-based rete, fluorosilicone and changes into rete, basic unit, fluorosilicone and change into rete, fluorine-based rete and fluorosilicone and change into rete.Publication number is that the patent of CN201199524 discloses a kind of five-layer structure: be followed successively by fluorosilicone and change into rete, basic unit, fluorosilicone and change into rete, fluorine-based rete and fluorosilicone and change into rete.Wherein basic unit is PET or PE.Publication number is that the patent of CN201527978U discloses a kind of three-decker: fluorine resin film layer, PET polyester rete, fluorine resin film layer.This backboard greatly reduces cost.Adopt the backboard cost of fluorine resin film layer preparation lower, this backboard generally is to take the rubbing method preparation.The backboard of this method preparation generally has defectives such as micropore, has a strong impact on the performance of backboard.
Therefore need a kind of new solar cell backboard and preparation method thereof to address the above problem.
Summary of the invention
Goal of the invention: the object of the invention provides a kind of resistant to elevated temperatures polyimide battery barrier film and preparation method thereof to existing solar cell backboard.
Technical scheme: for realizing the foregoing invention purpose, solar cell backboard of the present invention can adopt following technical scheme:
The solar cell backboard that a kind of weather resistance is good is characterized in that: said battery back-sheet is a five-layer structure, and said five-layer structure is followed successively by from outside to inside: contain F composite membrane, first glue-line, PET film, second glue-line, transition zone.
Preferably; The said thickness that contains the F composite membrane is for being 0.03-0.05mm, and the thickness of said first glue-line is 0.016-0.025mm, and the thickness of said PET film is 0.1-0.3mm; The thickness of said second glue-line is 0.016-0.025mm, and the thickness of said transition zone is 0.02-0.05mm.
Preferably, the said F of containing composite membrane is the composite membrane of PVDF resin and polyacrylic resin, and the thickness of wherein said PVDF resin is 0.005-0.015mm.
Preferably, used glue is polyurethane or acryl glue in said first glue-line and second glue-line.
Preferably, said transition zone is eva film or PE film.
The preparation method of the solar cell backboard that a kind of weather resistance is good may further comprise the steps:
(1) method of employing double-layer coextrusion is extruded PVDF resin and polyacrylic resin under 180-230 ℃ working temperature, prepares the said F of containing composite membrane;
(2) the said F of containing composite membrane, PET film, transition zone are carried out preliminary treatment;
(3),, then pressing is carried out in it and the said F of containing composite membrane 60-150 ℃ of drying in said PET film one side surface glue coated;
(4) at the opposite side surface-coated glue of said PET film,, then pressing is carried out in it and said transition zone, prepare the good solar cell backboard of weather resistance thus 60-150 ℃ of drying.
Preferably, the pressing described in the step c is temperature and the 5-25Kg/cm at 80-100 ℃
2Pressure under carry out pressing, again under 50-100 ℃ temperature the baking 6-48 hour; Pressing described in the steps d is temperature and the 5-25Kg/cm at 80-100 ℃
2Pressure under carry out pressing, again under 50-100 ℃ of temperature the baking 6-48 hour;
Preferably, pretreating process comprises cleaning surfaces and chemical surface treatment, and chemical surface treatment comprises that surface plasma is handled or surface corona is handled;
Preferably, step c and steps d replacement.
Beneficial effect: the present invention adopts PVDF or the PVF film that contains F composite membrane and transition zone import substitution, greatly reduces cost.Simultaneously, contain the F composite membrane and can resist the ultraviolet irradiation equivalent damage, guaranteed that backboard possesses excellent weather resistance, adopt transition zone to guarantee backboard and the excellent adhesion strength of solar module.
Figure of description
Fig. 1 is the structural representation of the good solar cell backboard of weather resistance of the present invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment; Further illustrate the present invention; Should understand these embodiment only be used to the present invention is described and be not used in the restriction scope of the present invention; After having read the present invention, those skilled in the art all fall within the application's accompanying claims institute restricted portion to the modification of the various equivalent form of values of the present invention.
As shown in Figure 1, the invention discloses the good solar cell backboard of a kind of weather resistance, battery back-sheet is a five-layer structure, wherein five-layer structure is followed successively by from outside to inside: contain F composite membrane 1, first glue-line 2, PET film 3, second glue-line 4, transition zone 5.Wherein, the thickness that contains F composite membrane 1 is for being 0.03-0.05mm, and the thickness of first glue-line 2 is 0.016-0.025mm, and the thickness of PET film 3 is 0.125-0.3mm, and the thickness of second glue-line 4 is 0.016-0.025mm, and the thickness of transition zone 5 is 0.02-0.05mm.Contain F composite membrane 1 and be the composite membrane of PVDF resin 11 with polyacrylic resin 12, wherein the thickness of PVDF resin 11 is 0.005-0.015mm.Glue used in first glue-line 2 and second glue-line 4 can be polyurethane glue or acryl glue.Transition zone 5 can be eva film or PE film.
The preparation method of solar cell backboard of the present invention may further comprise the steps:
The method of a, employing double-layer coextrusion is extruded PVDF resin and polyacrylic resin under 180-230 ℃ working temperature, prepare the said F of containing composite membrane;
B, the said F of containing composite membrane, PET film, transition zone are carried out preliminary treatment;
C, in said PET film one side surface glue coated, 60-120 ℃ of drying, then pressing is carried out in it and the said F of containing composite membrane;
D, at the opposite side surface-coated glue of said PET film, 60-120 ℃ of drying, then pressing is carried out in it and said transition zone, prepare the good solar cell backboard of weather resistance thus.
Wherein, the pressing among the step c is temperature and the 5-25Kg/cm at 80-100 ℃
2Pressure under carry out pressing, again under 50-100 ℃ temperature the baking 6-48 hour; Pressing in the steps d is temperature and the 5-25Kg/cm at 80-100 ℃
2Pressure under carry out pressing, again under 50-100 ℃ of temperature the baking 6-48 hour.Preliminary treatment among the step b comprises cleaning surfaces and chemical surface treatment.Chemical surface treatment comprises that surface plasma is handled or surface corona is handled.Wherein, step c and steps d can mutual alternative.
Specific embodiment is following:
Embodiment 1:
1. the preparation of material:
Preparation PVDF resin and polyacrylic resin, thickness are that PET film, polyurethane glue, the thickness of 0.125mm is the eva film of 0.05mm.
2. the preparation of backboard:
(1) adopt the method for double-layer coextrusion, PVDF resin and polyacrylic resin are extruded under 230 ℃ working temperature, what prepare thickness and be 0.03mm contains the F composite membrane.Wherein the PVDF layer thickness is 0.015mm.
(2) the PET film is carried out preliminary treatment; Handling the rear film surface energy is 48 dyne.
(3) in PET film surface glue coated, coating thickness is 40 microns, then 60 ℃ of dryings, again with it with contain the F composite membrane and under certain temperature and pressure, carry out pressing; 80 ℃ of pressure and temps, pressure 25Kg/cm
2, again 50 ℃ of bakings 48 hours.
(4) at another surface-coated glue of PET film, coating thickness is 40 microns, 60 ℃ of dryings, then pressing is carried out in it and eva film under certain temperature and pressure, and wherein temperature is 80 ℃, pressure 25Kg/cm
2, again 50 ℃ of bakings 48 hours.Prepare solar cell backboard thus.
3. Performance Detection
The thickness that adopts miking to obtain backboard is 222 microns (calculating glue-line thus is 21 microns), adopts ASTM F-1249 canonical measure steam isolation capacity, and measurement result is 1.3g/m
2.24H; Adopt ASTMD-149 canonical measure proof voltage ability, measurement result is 25KV; Adopt the aptitude tests of IEC 60664-1 canonical measure partial discharge, test result is 1200V; Employing IEC6125 standard is carried out moisture and freezed test, and the result shows: adopt two 85 test weatherabilities (under the condition of 85 ℃ of temperature, humidity 85%RH, continuous ultraviolet irradiation 3000h), the result shows:
It is 6.8N/cm that the range estimation sample does not have flavescence, no bulge, interlaminar strength, and xanthochromia index △ b is 1.4 (≤2).
Embodiment 2:
1. the preparation of material:
Preparation PVDF resin and polyacrylic resin, thickness are that PET film, polyurethane glue, the thickness of 0.3mm is the eva film of 0.02mm.
2. the preparation of backboard:
(1) adopt the method for double-layer coextrusion, PVDF resin and polyacrylic resin are extruded under 200 ℃ working temperature, what prepare thickness and be 0.05mm contains the F composite membrane, and wherein the PVDF layer thickness is 0.008mm;
(2) the PET film is carried out preliminary treatment; Handling the rear film surface energy is 52 dyne;
(3) in PET film one side surface glue coated, coating thickness is 50 microns, then 120 ℃ of dryings, again with it with contain the F composite membrane and under certain temperature and pressure, carry out pressing, 100 ℃ of pressure and temps, pressure 15Kg/cm
2, again 100 ℃ of bakings 6 hours;
(4) at the opposite side surface-coated glue of PET film, coating thickness is 50 microns, 120 ℃ of dryings, then pressing is carried out in it and eva film under certain temperature and pressure, and wherein temperature is 100 ℃, pressure 15Kg/cm
2, again 100 ℃ of bakings 6 hours.Prepare solar cell backboard thus.
3. Performance Detection
The thickness that adopts miking to obtain backboard is 420 microns (calculating glue-line thus is 25 microns), adopts ASTM F-1249 canonical measure steam isolation capacity, and measurement result is 1.1g/m
2.24H; Adopt ASTMD-149 canonical measure proof voltage ability, measurement result is 28KV; Adopt the aptitude tests of IEC 60664-1 canonical measure partial discharge, test result is 1200V; Adopt the IEC6125 standard to carry out moisture and freeze test; The result shows: adopt two 85 test weatherabilities (under the condition of 85 ℃ of temperature, humidity 85%RH; Continuous ultraviolet irradiation 3000h); The result shows: it is 7.4N/cm that the range estimation sample does not have flavescence, no bulge, interlaminar strength, and xanthochromia index △ b is 1.4 (≤2).
Embodiment 3:
1. the preparation of material:
Preparation PVDF resin and polyacrylic resin, thickness are that PET film, polyurethane glue, the thickness of 0.2mm is the eva film of 0.04mm.
2. the preparation of backboard:
(1) adopt the method for double-layer coextrusion, PVDF resin and polyacrylic resin are extruded under 180 ℃ working temperature, what prepare thickness and be 0.03mm contains the F composite membrane.Wherein the PVDF layer thickness is 0.005mm.
(2) the PET film is carried out preliminary treatment; Handling the rear film surface energy is 51 dyne.
(3) in PET film surface glue coated, coating thickness is 35 microns, then 100 ℃ of dryings, again with it with contain the F composite membrane and under certain temperature and pressure, carry out pressing; 100 ℃ of pressure and temps, pressure 5Kg/cm
2, again 100 ℃ of bakings 24 hours.
(4) at another surface-coated glue of PET film, coating thickness is 35 microns, 100 ℃ of dryings, then pressing is carried out in it and eva film under certain temperature and pressure; Temperature range is 100 ℃, pressure 5Kg/cm
2, again 100 ℃ of bakings 24 hours.Prepare backboard thus.
3. Performance Detection
The thickness that adopts miking to obtain backboard is 302 microns (calculating glue-line thus is 16 microns), adopts ASTM F-1249 canonical measure steam isolation capacity, and measurement result is 1.4g/m
2.24H; Adopt ASTMD-149 canonical measure proof voltage ability, measurement result is 21KV; Adopt the aptitude tests of IEC 60664-1 canonical measure partial discharge, test result is 1300V; Adopt the IEC6125 standard to carry out moisture and freeze test; The result shows: adopt two 85 test weatherabilities (under the condition of 85 ℃ of temperature, humidity 85%RH; Continuous ultraviolet irradiation 3000h); The result shows: it is 7.4N/cm that the range estimation sample does not have flavescence, no bulge, interlaminar strength, and xanthochromia index △ b is 1.6 (≤2).
The solar cell backboard of the present invention's preparation adopts PVDF or the PVF film that contains F composite membrane and transition zone import substitution, greatly reduces cost.Simultaneously, contain the F composite membrane and can resist the ultraviolet irradiation equivalent damage, guaranteed that backboard possesses excellent weather resistance, adopt transition zone to guarantee backboard and the excellent adhesion strength of solar module.
Claims (10)
1. solar cell backboard that weather resistance is good; It is characterized in that: said battery back-sheet is a five-layer structure, and said five-layer structure is followed successively by from outside to inside: contain F composite membrane (1), first glue-line (2), PET film (3), second glue-line (4), transition zone (5).
2. the good solar cell backboard of weather resistance as claimed in claim 1; It is characterized in that: the thickness of the said F of containing composite membrane (1) is for being 0.03-0.05mm; The thickness of said first glue-line (2) is 0.016-0.025mm; The thickness of said PET film (3) is 0.125-0.3mm, and the thickness of said second glue-line (4) is 0.016-0.025mm, and the thickness of said transition zone (5) is 0.02-0.05mm.
3. the good solar cell backboard of weather resistance as claimed in claim 1; It is characterized in that: the said F of containing composite membrane (1) is the composite membrane of PVDF resin (11) with polyacrylic resin (12), and the thickness of wherein said PVDF resin (11) is 0.005-0.015mm.
4. the good solar cell backboard of weather resistance as claimed in claim 1 is characterized in that: used glue is polyurethane glue or acryl glue in said first glue-line (2) and second glue-line (4).
5. the good solar cell backboard of weather resistance as claimed in claim 1 is characterized in that: said transition zone (5) is eva film or PE film.
6. like the preparation method of the good solar cell backboard of each described weather resistance of claim 1-5, it is characterized in that, may further comprise the steps:
The method of a, employing double-layer coextrusion is extruded PVDF resin and polyacrylic resin under 180-230 ℃ working temperature, prepare the said F of containing composite membrane;
B, the said F of containing composite membrane, PET film, transition zone are carried out preliminary treatment;
C, in said PET film one side surface glue coated, 60-120 ℃ of drying, then pressing is carried out in it and the said F of containing composite membrane;
D, at the opposite side surface-coated glue of said PET film, 60-120 ℃ of drying, then pressing is carried out in it and said transition zone, prepare the good solar cell backboard of weather resistance thus.
7. the preparation method of the solar cell backboard that weather resistance as claimed in claim 6 is good is characterized in that, the pressing described in the step c is temperature and the 5-25Kg/cm at 80-100 ℃
2Pressure under carry out pressing, again under 50-100 ℃ temperature the baking 6-48 hour; Pressing described in the steps d is temperature and the 5-25Kg/cm at 80-100 ℃
2Pressure under carry out pressing, again under 50-100 ℃ of temperature the baking 6-48 hour.
8. the preparation method of the solar cell backboard that weather resistance as claimed in claim 6 is good is characterized in that the preliminary treatment described in the step b comprises cleaning surfaces and chemical surface treatment.
9. the preparation method of the solar cell backboard that weather resistance as claimed in claim 8 is good is characterized in that, said chemical surface treatment comprises that surface plasma is handled or surface corona is handled.
10. the preparation method of the solar cell backboard that weather resistance as claimed in claim 6 is good is characterized in that, step c and steps d replacement.
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| CN201210141076.7A CN102637763B (en) | 2012-05-08 | 2012-05-08 | Solar cell backboard with excellent weathering resistance and preparation method thereof |
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| CN201210141076.7A CN102637763B (en) | 2012-05-08 | 2012-05-08 | Solar cell backboard with excellent weathering resistance and preparation method thereof |
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| CN102983193A (en) * | 2012-11-26 | 2013-03-20 | 山东东岳高分子材料有限公司 | High-cohesiveness solar battery rear panel film and production method thereof |
| CN103072349A (en) * | 2013-01-30 | 2013-05-01 | 西安航天三沃化学有限公司 | Composite film for back plate of solar battery |
| CN103560163A (en) * | 2013-11-13 | 2014-02-05 | 英利集团有限公司 | Titanium dioxide compound and solar cell backboard comprising the same |
| CN103928551A (en) * | 2013-01-10 | 2014-07-16 | 中天光伏材料有限公司 | Heterogeneous double-face fluorine-containing solar battery backboard |
| CN105489686A (en) * | 2015-12-02 | 2016-04-13 | 中天光伏材料有限公司 | Photovoltaic back plate with low water-vapor transmittance rate and compound technology |
| CN105679868A (en) * | 2016-04-14 | 2016-06-15 | 董友强 | Silicon-based film solar cell |
| CN105990461A (en) * | 2015-01-19 | 2016-10-05 | 台虹科技股份有限公司 | Solar cell back sheet |
| CN106024953A (en) * | 2016-07-27 | 2016-10-12 | 无锡中洁能源技术有限公司 | Solar energy backboard with high-reflectivity coating layer |
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| CN102983193A (en) * | 2012-11-26 | 2013-03-20 | 山东东岳高分子材料有限公司 | High-cohesiveness solar battery rear panel film and production method thereof |
| CN102983193B (en) * | 2012-11-26 | 2015-09-16 | 山东东岳高分子材料有限公司 | A kind of high-adhesion solar cell backboard film and preparation method thereof |
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| CN103072349A (en) * | 2013-01-30 | 2013-05-01 | 西安航天三沃化学有限公司 | Composite film for back plate of solar battery |
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| CN105990461A (en) * | 2015-01-19 | 2016-10-05 | 台虹科技股份有限公司 | Solar cell back sheet |
| CN105489686B (en) * | 2015-12-02 | 2017-12-29 | 中天光伏材料有限公司 | A kind of saturating photovoltaic back of low water and combination process |
| CN105489686A (en) * | 2015-12-02 | 2016-04-13 | 中天光伏材料有限公司 | Photovoltaic back plate with low water-vapor transmittance rate and compound technology |
| CN106992255A (en) * | 2016-01-18 | 2017-07-28 | 张家港康得新光电材料有限公司 | Encapsulating structure, its preparation method and its apply |
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| CN113635578A (en) * | 2021-05-25 | 2021-11-12 | 浙江玖邦科技有限公司 | Preparation method of fuel cell protective film |
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