CN102496642B - Back sheet of solar cell and preparation method for back sheet - Google Patents
Back sheet of solar cell and preparation method for back sheet Download PDFInfo
- Publication number
- CN102496642B CN102496642B CN 201110435590 CN201110435590A CN102496642B CN 102496642 B CN102496642 B CN 102496642B CN 201110435590 CN201110435590 CN 201110435590 CN 201110435590 A CN201110435590 A CN 201110435590A CN 102496642 B CN102496642 B CN 102496642B
- Authority
- CN
- China
- Prior art keywords
- resin combination
- mass parts
- resin
- solar cell
- curing agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Photovoltaic Devices (AREA)
Abstract
The invention provides a back sheet of a solar cell. The back sheet comprises a substrate with a high aqueous vapor barrier property, a bonder layer and a weatherproof layer, wherein the bonder layer is formed by a first resin composition comprising 70 to 90 mass parts of hydroxyl-containing or carboxyl-containing matrix resin, 10 to 30 mass parts of fluorine-containing resin, 5 to 15 mass parts of curing agent and 5 to 30 mass parts of solvent; the weatherproof layer is formed by a second resin composition comprising 100 mass parts of fluorine-containing resin, 5 to 15 mass parts of curing agent, 50 to 150 mass parts of inorganic filler and 50 to 100 mass parts of solvent; the fluorine-containing resin in the first resin composition is the same as that in the second resin composition; and the curing agent in the first resin composition is the same as that in the second resin composition. The invention also provides a preparation method for the back sheet of the solar cell. The back sheet of the solar cell has a high bond property and low aqueous vapor permeability.
Description
Technical field
The invention belongs to technical field of solar batteries, relate in particular to a kind of solar cell backboard and preparation method thereof.
Background technology
Solar cell is photovoltaic cell again, is the device that directly luminous energy is changed into electric energy by photoelectric effect or Photochemical effects, is widely used in departments such as military affairs, space flight, industry, commerce, agricultural, communication, household electrical appliance and public utility.
Difference according to material therefor, solar cell can be divided into silicon solar cell, multi-element compounds thin-film solar cells, polymer multi-layer modified electrode type solar cell, nano-crystalline solar battery, organic solar batteries etc., wherein, silicon solar cell is to develop the most ripe battery at present, occupies leading position in application.Silicon solar cell can be divided into monocrystaline silicon solar cell, multi-crystal silicon film solar battery and amorphous silicon thin-film solar cell again.
Silicon solar cell is a laminated construction normally; mainly comprise surface layer of glass, solar battery sheet, ethylene-vinyl acetate sealant and solar energy backboard; wherein; the solar energy backboard is called solar cell backboard, solar cell backboard film, photovoltaic back, photovoltaic back film etc. again; it is positioned at the back side of solar panel or solar battery sheet, and cell panel or battery sheet are played protection and supporting role.Because it is outdoor that solar cell is used for more, and be generally useful life 25 years, therefore, the solar energy backboard need have good weatherability and moisture barrier property.
In the prior art, solar cell backboard generally adopts fluorine material preparation, and as TPT type backboard, wherein, T refers to Tedlar, i.e. polyvinyl fluoride fluorine (PVF) plastic film of E.I.Du Pont Company, and P refers to biaxial tension PET thin plate; In order to save cost, can adopt one deck fluorine plastic film in other plastic films replacements TPT type backboard, as TPE type backboard, wherein, E generally refers to LLDPE, EVA or other ethylene copolymer etc.The backboard of these two kinds of structures generally adopts composite algorithm production, be about to layers of material and make film forming, obtain having the backboard of said structure again by composite algorithm, still, when adopting fluorine-containing compound to adopt composite algorithm to produce, there are shortcomings such as processing difficulties, complex manufacturing.In order to overcome the shortcoming of composite algorithm, prior art also can adopt cladding process to produce backboard, cladding process need not that fluorine material is carried out film forming and handles, but, when adopting at present general primary coating technology film forming, the film surface that obtains can produce macroscopic pin hole, thereby influences the water vapor barrier property of backboard, PET occurs phenomenons such as hydrolysis, adhesive jaundice easily take place, influence the useful life of solar cell backboard.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is to provide a kind of solar cell backboard and preparation method thereof, and solar cell backboard provided by the invention has good water vapor barrier property, caking property and weatherability, has long useful life.
The invention provides a kind of solar cell backboard, comprise substrate, be compounded in the adhesive layer on the described substrate and be compounded in weathering layer on the described adhesive layer, described adhesive layer is formed by first resin combination:
The matrix resin that contains hydroxyl or carboxyl of 70～90 mass parts;
The fluorine resin of 10～30 mass parts;
The curing agent of 5～15 mass parts;
The solvent of 5～30 mass parts;
Described weathering layer is formed by second resin combination:
The fluorine resin of 100 mass parts;
The curing agent of 5～15 mass parts;
The inorganic filler of 50～150 mass parts;
The solvent of 50～100 mass parts;
Wherein, the fluorine resin in first resin combination is identical with fluorine resin in second resin combination, and the curing agent in first resin combination is identical with curing agent in second resin combination.
Preferably, described fluorine resin is one or more in Kynoar, trifluoro-ethylene-hydroxy alkyl vinyl ether co-polymer, chlorotrifluoroethylene-hydroxy alkyl vinyl ether co-polymer, tetrafluoroethene-hydroxy alkyl vinyl ether co-polymer, trifluoro-ethylene-carboxyalkyl vinyl ester copolymer, chlorotrifluoroethylene-carboxyalkyl vinyl ester copolymer and the tetrafluoroethene-carboxyalkyl vinyl ester copolymer.
Preferably, in described first resin combination, the described matrix resin that contains hydroxyl or carboxyl is to contain the mylar of hydroxyl or carboxyl or contain hydroxyl or the polyacrylate resin of carboxyl.
Preferably, described curing agent is one or more in epoxy curing agent, isocyanate curing agent and the carbodiimides curing agent.
Preferably, the solvent in described first resin combination is one or more in toluene, ethyl acetate, butyl acetate and the cyclohexanone, and the solvent in described second resin combination is one or more in toluene, ethyl acetate, butyl acetate and the cyclohexanone.
Preferably, the solvent in described first resin combination is identical with solvent in second resin combination.
Preferably, described inorganic filler is oxide, titanyl compound, the oxide of aluminium or the oxide of tin of silicon.
Preferably, also comprise the barrier layer that is compounded between described adhesive layer and the substrate, described barrier layer is formed by aluminium or silicon dioxide.
Compared with prior art, solar cell backboard provided by the invention has the structure of substrate/adhesive layer/weathering layer, and wherein, described adhesive layer is formed by first resin combination: the matrix resin that contains hydroxyl or carboxyl of 70～90 mass parts; The fluorine resin of 10～30 mass parts; The curing agent of 5～15 mass parts; The solvent of 5～30 mass parts; Described weathering layer is formed by second resin combination: the fluorine resin of 100 mass parts; The curing agent of 5～15 mass parts; The inorganic filler of 50～150 mass parts; The solvent of 50～100 mass parts; Wherein, the fluorine resin in first resin combination is identical with fluorine resin in second resin combination, and the curing agent in first resin combination is identical with curing agent in second resin combination.The present invention uses same fluorine resin and curing agent in adhesive layer and weathering layer, strengthened the adhesive property between adhesive layer and the weathering layer; The present invention forms weathering layer with fluorine resin, makes the solar cell backboard that obtains have good water vapor barrier property and weatherability, thereby prolongs the useful life of solar cell backboard.
The present invention also provides a kind of preparation method of solar cell backboard, may further comprise the steps:
A) apply first resin combination and curing at substrate, make the curing degree of described first resin combination reach 30%～70%, described first resin combination comprises:
The matrix resin that contains hydroxyl or carboxyl of 70～90 mass parts;
The fluorine resin of 10～30 mass parts;
The curing agent of 5～15 mass parts;
The solvent of 5～30 mass parts;
B) apply second resin combination on the first resin combination solidfied material that obtains to described step a), obtain solar cell backboard after the curing, described second resin combination comprises:
The fluorine resin of 100 mass parts;
The curing agent of 5～15 mass parts;
The inorganic filler of 50～150 mass parts;
The solvent of 50～100 mass parts;
Wherein, the fluorine resin in first resin combination is identical with fluorine resin in second resin combination, and the curing agent in first resin combination is identical with curing agent in second resin combination.
Preferably, described step b) specifically comprises:
B1) apply first mass parts, second resin combination and solidifying on the first resin combination solidfied material that obtains to described step a), make first mass parts, the second resin combination curing degree reach 30%～60%;
B2) to described step b1) apply second mass parts, second resin combination on the first mass parts resin combination solidfied material that obtains and solidify, obtain solar cell backboard.
Preferably, the mass ratio of described first mass parts, second resin combination and described second mass parts, second resin combination is (60～80): (20～40).
The present invention at first applies first resin combination and curing at substrate, reach at 30%～70% o'clock at its curing degree and continue to apply second resin combination, and second resin combination and first resin combination are solidified simultaneously form weathering layer and adhesive layer respectively, because first resin combination has used identical fluorine resin and curing agent with second resin combination, and when first resin combination is in semi-cured state, apply second resin combination and make adhesive layer and weathering layer film-forming together, strengthened the adhesive property between adhesive layer and the weathering layer.Experimental result shows that solar cell backboard provided by the invention has good adhesive property and lower steam transmitance, and after process UV processing, thermal cycle processing, moisture-proof froze processing and moisture-proof heat treatment, the adhesive force of adhesive layer and weathering layer was 0 grade.Further, the present invention at first applies first mass parts, second resin combination and solidifies on the adhesive layer of semi-solid preparation attitude, reach at 30%～60% o'clock at its curing degree and continue to apply second mass parts, second resin combination, this twice coating processes can reduce the appearance of weathering layer pin hole, thereby improve weather resistance and the barrier of weathering layer, thereby prolong the useful life of solar cell backboard.
Description of drawings
The structural representation of the solar cell backboard that Fig. 1 provides for the embodiment of the invention.
Embodiment
The invention provides a kind of solar cell backboard, comprise substrate, be compounded in the adhesive layer on the described substrate and be compounded in weathering layer on the described adhesive layer, wherein, described adhesive layer is formed by first resin combination:
The matrix resin that contains hydroxyl or carboxyl of 70～90 mass parts;
The fluorine resin of 10～30 mass parts;
The curing agent of 5～15 mass parts;
The solvent of 5～30 mass parts;
Described weathering layer is formed by second resin combination:
The fluorine resin of 100 mass parts;
The curing agent of 5～15 mass parts;
The inorganic filler of 50～150 mass parts;
The solvent of 50～100 mass parts;
Wherein, the fluorine resin in first resin combination is identical with fluorine resin in second resin combination, and the curing agent in first resin combination is identical with curing agent in second resin combination.
The present invention uses same fluorine resin and curing agent in adhesive layer and weathering layer, strengthened the adhesive property between adhesive layer and the weathering layer; The present invention forms weathering layer with fluorine resin, makes the solar cell backboard that obtains have good water vapor barrier property and weatherability, thereby prolongs the useful life of solar cell backboard.
Solar cell backboard provided by the invention has the universal architecture of present solar cell backboard, comprises substrate, is compounded in the adhesive layer on the described substrate and is compounded in weathering layer on the described adhesive layer.In the present invention, it is the symmetrical structure of symmetry axis that described solar cell backboard can have with the substrate, also can have dissymmetrical structure.Referring to Fig. 1, the structural representation of the solar cell backboard that Fig. 1 provides for the embodiment of the invention, wherein, 1 is substrate, 2 for being compounded in first adhesive layer on the substrate 1, and 3 for being compounded in first weathering layer on first adhesive layer 2, and 4 for being compounded in the barrier layer between first adhesive layer 2 and the substrate 1,5 for being compounded in second adhesive layer of substrate 1 another side, and 6 for being compounded in second weathering layer on second adhesive layer 5.
Described solar cell backboard has when being the symmetrical structure of symmetry axis with the substrate, it is specially: substrate, be compounded in first adhesive layer and second adhesive layer on the described substrate respectively, be compounded in first weathering layer on described first adhesive layer, be compounded in second weathering layer on described second adhesive layer, namely it has the structure of first weathering layer/first adhesive layer/substrate/second adhesive layer/second weathering layer; Wherein, first adhesive layer is identical with second adhesive layer, and first weathering layer is identical with second weathering layer.
When described solar cell backboard had dissymmetrical structure, it was specially: substrate, be compounded in adhesive layer and the weathering layer that is compounded on the described adhesive layer on the described substrate, and namely have the structure of weathering layer/adhesive layer/substrate.
The present invention does not have particular restriction to the structure of described solar cell backboard, can be dissymmetrical structure for being the symmetrical structure of symmetry axis with the substrate yet.Compare with dissymmetrical structure, the symmetrical structure that with the substrate is symmetry axis has only increased same adhesive layer and weathering layer at the substrate another side, therefore, the present invention is that example is specifically described with the solar cell with dissymmetrical structure, one skilled in the art may determine that it is the solar cell backboard of the symmetrical structure of symmetry axis that following description is equally applicable to have with the substrate.
In described solar cell backboard, described substrate is preferably PETG (PET) film of those skilled in the art's resin, and the present invention does not have particular restriction to its thickness, and those skilled in the art can determine according to actual needs.
In described solar cell backboard, described weathering layer is formed by second resin combination, and described second resin combination comprises:
The fluorine resin of 100 mass parts;
The curing agent of 5～15 mass parts;
The inorganic filler of 50～150 mass parts;
The solvent of 50～100 mass parts;
Fluorine resin has good weather resistance, can be used as the weathering layer of solar cell backboard.In the present invention, described fluorine resin is preferably one or more in Kynoar, trifluoro-ethylene-hydroxy alkyl vinyl ether co-polymer, chlorotrifluoroethylene-hydroxy alkyl vinyl ether co-polymer, tetrafluoroethene-hydroxy alkyl vinyl ether co-polymer, trifluoro-ethylene-carboxyalkyl vinyl ester copolymer, chlorotrifluoroethylene-carboxyalkyl vinyl ester copolymer and the tetrafluoroethene-carboxyalkyl vinyl ester copolymer, as the manufacturing of Da Jin coating, model is the fluorine resin of GK570; Asahi Glass Co., Ltd makes, model is that the fluorine resin of LF200, LF600X etc. all can.
Also comprise curing agent in described second resin combination, the effect of described curing agent is to make the resin combination film-forming.In the present invention, described curing agent is preferably one or more in epoxy curing agent, isocyanate curing agent and the carbodiimides curing agent, all can as the TKA-100 of Asahi Chemical Industry's manufacturing, the curing agent such as N3390, N100 of Bayer.In the present invention, the content of described curing agent is 5～15 mass parts, is preferably 8～12 mass parts.
Described second resin combination also comprises inorganic filler, and the effect of described inorganic filler is to strengthen the resistance to wear of described weathering layer.Described inorganic filler is preferably oxide, titanyl compound, the oxide of aluminium or the oxide of tin etc. of silicon, more preferably silicon dioxide.The content of described inorganic filler is 50～150 mass parts, is preferably 70～120 mass parts, more preferably 80～100 mass parts.
Described second resin combination also comprises solvent, and described solvent is preferably one or more in toluene, ethyl acetate, butyl acetate and the cyclohexanone, more preferably the mixture of cyclohexanone and toluene.In the present invention, the content of described solvent is 50～100 mass parts, is preferably 70～90 mass parts.
Described second resin combination can form film after solidifying, thereby obtains weathering layer.
In described solar cell backboard, described adhesive layer is formed by first resin combination, and first resin combination comprises:
The matrix resin that contains hydroxyl or carboxyl of 70～90 mass parts;
The fluorine resin of 10～30 mass parts;
The curing agent of 5～15 mass parts;
The solvent of 5～30 mass parts.
In described first resin combination, the described matrix resin that contains hydroxyl or carboxyl is the matrix resin of binding agent, mainly plays cementation.In the present invention, the described resin that contains hydroxyl or carboxyl is preferably the mylar that contains hydroxyl or carboxyl or contains hydroxyl or the polyacrylate resin of carboxyl, spins GK680, ST5790, Japanese synthetic chemistry 8723 etc. as Japanese Japan.In described first resin combination, the described mass fraction that contains the matrix resin of hydroxyl or carboxyl is 70～90 mass parts, is preferably 75～85 mass parts.
Described first resin combination also contains fluorine resin, described fluorine resin is identical with fluorine resin in described second resin combination, be that described adhesive layer uses identical fluorine resin with described weathering layer, thereby strengthen the adhesive property between adhesive layer and the weathering layer.In described first resin combination, the content of described fluorine resin is 10～30 mass parts, is preferably 15～25 mass parts.
Described first resin combination also contains curing agent, and described curing agent is identical with curing agent in described second resin combination, and namely described adhesive layer uses identical curing agent with described weathering layer, makes adhesive layer and weathering layer concurrently curable film forming.In described first resin combination, the content of described curing agent is 5～15 mass parts, is preferably 8～13 mass parts.
Described first resin combination also comprises solvent, and described solvent is preferably one or more in toluene, ethyl acetate, butyl acetate and the cyclohexanone, more preferably the mixture of cyclohexanone and toluene.In this described first resin combination, the content of described solvent is 5～30 mass parts, is preferably 10～25 mass parts.In the present invention, the solvent in described first resin combination can be identical with solvent in second resin combination, also can be different, and those skilled in the art can select and determine according to the matrix resin of selecting for use in first resin combination.
Described first resin combination can obtain adhesive layer behind film-forming on the substrate, described second resin combination can obtain weathering layer behind film-forming on the described adhesive layer.
In the present invention, the thickness of described adhesive layer is preferably 1 μ m～10 μ m, more preferably 2 μ m～8 μ m.
For water vapor barrier property and the resistance to elevated temperatures that improves described solar cell backboard, between described adhesive layer and described substrate, also comprise barrier layer.Described barrier layer is formed by aluminium or silicon dioxide etc.
The present invention does not have particular restriction to the thickness of each layer in the described solar cell backboard, and those skilled in the art can determine and select as required.
The present invention can adopt the method for coating to prepare described solar energy backboard, also can adopt composite methods to prepare described solar cell backboard, and in order to reduce the preparation difficulty, the present invention preferably adopts the method preparation of coating.
The present invention also provides a kind of preparation method of solar cell backboard, may further comprise the steps:
A) apply first resin combination and curing at substrate, make the curing degree of described first resin combination reach 30%～70%, described first resin combination comprises:
The matrix resin that contains hydroxyl or carboxyl of 70～90 mass parts;
The fluorine resin of 10～30 mass parts;
The curing agent of 5～15 mass parts;
The solvent of 5～30 mass parts;
B) apply second resin combination on the first resin combination solidfied material that obtains to described step a), obtain solar cell backboard after the curing, described second resin combination comprises:
The fluorine resin of 100 mass parts;
The curing agent of 5～15 mass parts;
The inorganic filler of 50～150 mass parts;
The solvent of 50～100 mass parts;
Wherein, the fluorine resin in first resin combination is identical with fluorine resin in second resin combination, and the curing agent in first resin combination is identical with curing agent in second resin combination.
In preparation method provided by the invention, described first resin combination forms adhesive layer, described second resin combination forms weathering layer, described first resin combination is identical with second resin combination with described first resin combination of second resin combination and technique scheme, the present invention is not giving unnecessary details, and gets final product referring to technique scheme.
The present invention at first applies first resin combination at substrate surface, the present invention does not have particular restriction to described painting method, and scraper well known to those skilled in the art is filmed, dip-coating, extruding are coated with, slide coating, curtain is coated with, modes such as rod is coated with, air knife coating, roller coat, spraying all can.
After substrate applies first resin combination, described first resin combination is cured.In order to increase the cementability between adhesive layer and the weathering layer, the present invention reaches 30%～70% at the curing degree of described first resin combination, preferably reach 40%～60%, more preferably reach at 45%～55% o'clock stops to solidify, at this moment, first resin combination is semi-cured state.In the present invention, the temperature of described curing is preferably 120 ℃～140 ℃, and more preferably 125 ℃～135 ℃, the time of described curing is preferably 1min～2min.
After making first resin combination reach semi-cured state, apply second resin combination on the first resin combination solidfied material that obtains, described coating can be filmed for scraper, dip-coating, extruding are coated with, slide coating, curtain is coated with, rod is coated with, air knife coating, roller coat, spraying etc.Second resin combination is cured after applying and finishing, and in the solidification process, first resin combination solidify to form adhesive layer fully by semi-cured state, and second resin combination solidify to form weathering layer fully.Because adhesive layer and weathering layer be film-forming simultaneously, its caking property is better.
In order to reduce the pin hole on the weathering layer, improve the barrier property of weathering layer, the present invention preferably makes the weathering layer film-forming in accordance with the following methods:
B1) apply first mass parts, second resin combination and solidifying on the first resin combination solidfied material that obtains to described step a), make first mass parts, the second resin combination curing degree reach 30%～60%;
B2) to described step b1) apply second mass parts, second resin combination on the first mass parts resin combination solidfied material that obtains and solidify, obtain solar cell backboard.
The present invention applies second resin combination respectively at twice, reduces the pin hole of the weathering layer that obtains, and improves weather resistance and the barrier property of weathering layer.
The present invention at first is coated in second resin combination of first mass parts on the semi-solid preparation thing of first resin combination formation, solidifying makes first mass parts, the second resin combination curing degree preferably reach 30%～60%, more preferably 35%～55%, at this moment, first mass parts, second resin combination is in semi-cured state.The temperature of described curing is preferably 140 ℃～160 ℃, and more preferably 145 ℃～155 ℃, the time of described curing is preferably 1min～2min.
Continuation is coated in second resin combination of second mass parts on the semi-solid preparation thing of first mass parts, second resin combination formation, and completion of cure forms adhesive layer and weathering layer simultaneously.The temperature of described curing is preferably 140 ℃～160 ℃, and more preferably 145 ℃～155 ℃, the time of described curing is preferably 1min～2min.
In the present invention, the mass ratio of described first mass parts, second resin combination and described second mass parts, second resin combination is preferably (60～80): (20～40), more preferably (65～75): (25～35).
Behind the completion of cure, can obtain solar cell backboard.
In the present invention, applying before first resin combination forms adhesive layer, preferably compound barrier layer on the described substrate.The present invention is evaporation barrier layer on the described substrate preferably, applies first resin combination at described barrier layer again.
After obtaining solar cell backboard, in accordance with the following methods it is carried out performance test respectively:
1, paint adhesion test
With reference to the cross-hatching adhesive force test (being divided into 1mm * 1mm grid) of stipulating among the ASTM D3359-87, detect fluorine coating and whether break away from the film in base material PET.
Evaluation criterion:
0 grade: do not have disengaging;
1 grade: break away from 5% area;
2 grades: break away from 5%～15% area;
2, anti-UV test
Test condition: with reference to IEC6121515---10.10;
UV?A：320～385nm；
UV?B：280～320nm；
Wavelength be 280nm to the ultraviolet light of 385nm, intensity is no more than 250W/m
2, inhomogeneous less than ± 15%.
UV A+B is radiated 15KWh/m, wherein UV B 〉=5KWh/m
2, T:60 ± 5 ℃;
Handle back test paint adhesion.
3, thermal cycle test
Test condition: with reference to IEC61215---10.11;-40 ℃ (± 2 ℃)～85 ℃ (± 2 ℃); 200Cycles; The speed of variations in temperature is no more than 100 ℃/h between the highest and minimum temperature, under each extreme temperature, should keep stable 10min at least, is no more than 6h a circulation timei.Handle back test paint adhesion.
4, moisture-proof freezes test
Test condition: with reference to IEC6121515---10.12;-40 ℃ (± 2 ℃)～85 ℃ (± 2 ℃) circulate 10 times.Handle back test paint adhesion.
5, moisture-proof heat test
Test condition: with reference to IEC6121515---10.13; 85 ℃ of (± 2 ℃)/85%RH, 1000h.Handle back test paint adhesion.
Experimental result shows that solar cell backboard provided by the invention has good adhesive property and lower steam transmitance, and after process UV processing, thermal cycle processing, moisture-proof froze processing and moisture-proof heat treatment, the adhesive force of adhesive layer and weathering layer was 0 grade.
The present invention at first applies first resin combination and curing at substrate, reach at 30%～70% o'clock at its curing degree and continue to apply second resin combination, and second resin combination and first resin combination are solidified simultaneously form weathering layer and adhesive layer respectively, because first resin combination has used identical fluorine resin and curing agent with second resin combination, and when first resin combination is in semi-cured state, apply second resin combination and make adhesive layer and weathering layer film-forming together, strengthened the adhesive property between adhesive layer and the weathering layer.Further, the present invention at first applies first mass parts, second resin combination and solidifies on the adhesive layer of semi-solid preparation attitude, reach at 30%～60% o'clock at its curing degree and continue to apply second mass parts, second resin combination, this twice coating processes can reduce the appearance of weathering layer pin hole, thereby improve weather resistance and the barrier of weathering layer, thereby prolong the useful life of solar cell backboard.
In order to further specify the present invention, below in conjunction with embodiment solar cell backboard provided by the invention and preparation method thereof is described in detail.
In the present embodiment, first resin composition formula is as follows, in mass fraction:
Second resin composition formula is as follows, in mass fraction:
Adopt the method for vacuum evaporation at PET film surface evaporation aluminium foil, form barrier layer; First resin combination that mixes is coated in aluminium foil barrier layer surface with the scraper coating device of 30 μ m, under 130 ℃ temperature, toasts 1～2min, obtain first adhesive layer of semi-cured state; Second resin combination that mixes, account for total amount 70wt% is coated on first adhesive layer of semi-solid preparation, 150 ℃ of oven dry 1～2min, first resin combination and second resin combination are solidified together, at this moment, the basic completion of cure of first resin combination forms first adhesive layer, and second resin combination is semi-cured state; Subsequently, second resin combination of residue 30wt% is coated on second resin combination of semi-cured state and at 150 ℃ of baking 1～2min down, obtaining total build is first weathering layer of 23 μ m～30 μ m;
Form second adhesive layer and second weathering layer respectively on another surface of PET film according to the method described above, obtain having second weathering layer/second adhesive layer/solar cell backboard of PET film/barrier layer/first adhesive layer/first weathering layer structure.
According to method mentioned above described solar cell backboard is carried out performance test, the result is referring to table 1, the performance parameter of the solar cell backboard that table 1 provides for the embodiment of the invention and comparative example.
Comparative example 1
In the present embodiment, first resin composition formula is as follows, in mass fraction:
Second resin composition formula is as follows, in mass fraction:
First resin combination that mixes is coated in PET film surface with the scraper coating device of 30 μ m, under 130 ℃ temperature, toasts 3～5min, solidify the back fully and form first adhesive layer; Second resin combination that mixes is coated on described first adhesive layer, and 150 ℃ of oven dry 3min obtain first weathering layer that total build is 20 μ m～25 μ m after solidifying fully;
Form second adhesive layer and second weathering layer respectively on another surface of PET film according to the method described above, obtain having second weathering layer/second adhesive layer/solar cell backboard of PET film/barrier layer/first adhesive layer/first weathering layer structure.
According to method mentioned above described solar cell backboard is carried out performance test, the result is referring to table 1, the performance parameter of the solar cell backboard that table 1 provides for the embodiment of the invention and comparative example.
In the present embodiment, first resin composition formula is as follows, in mass fraction:
Second resin composition formula is as follows, in mass fraction:
Adopt the method for vacuum evaporation at PET film surface steam coating silicon dioxide film, form barrier layer; First resin combination that mixes is coated in silicon dioxide barrier layer surface with the scraper coating device of 30 μ m, under 130 ℃ temperature, toasts 1～2min, obtain first adhesive layer of semi-cured state; Second resin combination that mixes, account for total amount 80wt% is coated on first adhesive layer of semi-solid preparation, 150 ℃ of oven dry 1～2min, first resin combination and second resin combination are solidified together, at this moment, the basic completion of cure of first resin combination forms first adhesive layer, and second resin combination is semi-cured state; Subsequently, second resin combination of residue 20wt% is coated on second resin combination of semi-cured state and at 150 ℃ of baking 1～2min down, obtaining total build is first weathering layer of 23 μ m～30 μ m;
Form second adhesive layer and second weathering layer respectively on another surface of PET film according to the method described above, obtain having second weathering layer/second adhesive layer/solar cell backboard of PET film/barrier layer/first adhesive layer/first weathering layer structure.
According to method mentioned above described solar cell backboard is carried out performance test, the result is referring to table 1, the performance parameter of the solar cell backboard that table 1 provides for the embodiment of the invention and comparative example.
Comparative example 2
In the present embodiment, first resin composition formula is as follows, in mass fraction:
Second resin composition formula is as follows, in mass fraction:
First resin combination that mixes is coated in PET film surface with the scraper coating device of 30 μ m, under 130 ℃ temperature, toasts 3～5min, solidify the back fully and form first adhesive layer; Second resin combination that mixes is coated on described first adhesive layer, and 150 ℃ of oven dry 3min obtain first weathering layer that total build is 20 μ m～25 μ m after solidifying fully;
Form second adhesive layer and second weathering layer respectively on another surface of PET film according to the method described above, obtain having second weathering layer/second adhesive layer/solar cell backboard of PET film/barrier layer/first adhesive layer/first weathering layer structure.
According to method mentioned above described solar cell backboard is carried out performance test, the result is referring to table 1, the performance parameter of the solar cell backboard that table 1 provides for the embodiment of the invention and comparative example.
In the present embodiment, first resin composition formula is as follows, in mass fraction:
Second resin composition formula is as follows, in mass fraction:
Adopt the method for vacuum evaporation at PET film surface steam coating silicon dioxide film, form barrier layer; First resin combination that mixes is coated in silicon dioxide barrier layer surface with the scraper coating device of 30 μ m, under 130 ℃ temperature, toasts 1～2min, obtain first adhesive layer of semi-cured state; Second resin combination that mixes, account for total amount 60wt% is coated on first adhesive layer of semi-solid preparation, 150 ℃ of oven dry 1～2min, first resin combination and second resin combination are solidified together, at this moment, the basic completion of cure of first resin combination forms first adhesive layer, and second resin combination is semi-cured state; Subsequently, second resin combination of residue 40wt% is coated on second resin combination of semi-cured state and at 150 ℃ of baking 1～2min down, obtaining total build is first weathering layer of 23 μ m～30 μ m;
Form second adhesive layer and second weathering layer respectively on another surface of PET film according to the method described above, obtain having second weathering layer/second adhesive layer/solar cell backboard of PET film/barrier layer/first adhesive layer/first weathering layer structure.
According to method mentioned above described solar cell backboard is carried out performance test, the result is referring to table 1, the performance parameter of the solar cell backboard that table 1 provides for the embodiment of the invention and comparative example.
Comparative example 3
In the present embodiment, first resin composition formula is as follows, in mass fraction:
Second resin composition formula is as follows, in mass fraction:
First resin combination that mixes is coated in PET film surface with the scraper coating device of 30 μ m, under 130 ℃ temperature, toasts 3～5min, solidify the back fully and form first adhesive layer; Second resin combination that mixes is coated on described first adhesive layer, and 150 ℃ of oven dry 3min obtain first weathering layer that total build is 20 μ m～25 μ m after solidifying fully;
Form second adhesive layer and second weathering layer respectively on another surface of PET film according to the method described above, obtain having second weathering layer/second adhesive layer/solar cell backboard of PET film/barrier layer/first adhesive layer/first weathering layer structure.
According to method mentioned above described solar cell backboard is carried out performance test, the result is referring to table 1, the performance parameter of the solar cell backboard that table 1 provides for the embodiment of the invention and comparative example.
The performance parameter of the solar cell backboard that table 1 embodiment of the invention and comparative example provide
As shown in Table 1, solar cell backboard provided by the invention has good adhesive property and lower steam transmitance, after process UV processing, thermal cycle processing, moisture-proof froze processing and moisture-proof heat treatment, the adhesive force of adhesive layer and weathering layer was 0 grade, and its steam transmitance is less than 1g.m
2/ 24h.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. solar cell backboard comprises substrate, is compounded in the adhesive layer on the described substrate and is compounded in weathering layer on the described adhesive layer, it is characterized in that described adhesive layer is formed by first resin combination:
The matrix resin that contains hydroxyl or carboxyl of 70～90 mass parts;
The fluorine resin of 10～30 mass parts;
The curing agent of 5～15 mass parts;
The solvent of 5～30 mass parts;
Described weathering layer is formed by second resin combination:
The fluorine resin of 100 mass parts;
The curing agent of 5～15 mass parts;
The inorganic filler of 50～150 mass parts;
The solvent of 50～100 mass parts;
Wherein, the fluorine resin in first resin combination is identical with fluorine resin in second resin combination, and the curing agent in first resin combination is identical with curing agent in second resin combination.
2. solar cell backboard according to claim 1, it is characterized in that described fluorine resin is one or more in Kynoar, trifluoro-ethylene-hydroxy alkyl vinyl ether co-polymer, chlorotrifluoroethylene-hydroxy alkyl vinyl ether co-polymer, tetrafluoroethene-hydroxy alkyl vinyl ether co-polymer, trifluoro-ethylene-carboxyalkyl vinyl ester copolymer, chlorotrifluoroethylene-carboxyalkyl vinyl ester copolymer and the tetrafluoroethene-carboxyalkyl vinyl ester copolymer.
3. solar cell backboard according to claim 1 is characterized in that, in described first resin combination, the described matrix resin that contains hydroxyl or carboxyl is to contain the mylar of hydroxyl or carboxyl or contain hydroxyl or the polyacrylate resin of carboxyl.
4. solar cell backboard according to claim 1 is characterized in that, described curing agent is one or more in epoxy curing agent, isocyanate curing agent and the carbodiimides curing agent.
5. solar cell backboard according to claim 1, it is characterized in that, solvent in described first resin combination is one or more in toluene, ethyl acetate, butyl acetate and the cyclohexanone, and the solvent in described second resin combination is one or more in toluene, ethyl acetate, butyl acetate and the cyclohexanone.
6. solar cell backboard according to claim 1 is characterized in that, described inorganic filler is oxide, titanyl compound, the oxide of aluminium or the oxide of tin of silicon.
7. solar cell backboard according to claim 1 is characterized in that, also comprises the barrier layer that is compounded between described adhesive layer and the substrate, and described barrier layer is formed by aluminium or silicon dioxide.
8. the preparation method of a solar cell backboard may further comprise the steps:
A) apply first resin combination and curing at substrate, make the curing degree of described first resin combination reach 30%～70%, described first resin combination comprises:
The matrix resin that contains hydroxyl or carboxyl of 70～90 mass parts;
The fluorine resin of 10～30 mass parts;
The curing agent of 5～15 mass parts;
The solvent of 5～30 mass parts;
B) apply second resin combination on the first resin combination solidfied material that obtains to described step a), obtain solar cell backboard after the curing, described second resin combination comprises:
The fluorine resin of 100 mass parts;
The curing agent of 5～15 mass parts;
The inorganic filler of 50～150 mass parts;
The solvent of 50～100 mass parts;
Wherein, the fluorine resin in first resin combination is identical with fluorine resin in second resin combination, and the curing agent in first resin combination is identical with curing agent in second resin combination.
9. preparation method according to claim 8 is characterized in that, described step b) specifically comprises:
B1) apply first mass parts, second resin combination and solidifying on the first resin combination solidfied material that obtains to described step a), make first mass parts, the second resin combination curing degree reach 30%～60%;
B2) to described step b1) apply second mass parts, second resin combination on the first mass parts resin combination solidfied material that obtains and solidify, obtain solar cell backboard.
10. preparation method according to claim 9 is characterized in that, the mass ratio of described first mass parts, second resin combination and described second mass parts, second resin combination is (60～80): (20～40).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110435590 CN102496642B (en) | 2011-12-22 | 2011-12-22 | Back sheet of solar cell and preparation method for back sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110435590 CN102496642B (en) | 2011-12-22 | 2011-12-22 | Back sheet of solar cell and preparation method for back sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102496642A CN102496642A (en) | 2012-06-13 |
| CN102496642B true CN102496642B (en) | 2013-07-17 |
Family
ID=46188444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110435590 Active CN102496642B (en) | 2011-12-22 | 2011-12-22 | Back sheet of solar cell and preparation method for back sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102496642B (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931263A (en) * | 2012-11-12 | 2013-02-13 | 乐凯胶片股份有限公司 | Solar battery back film and preparation 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 |
| CN104103705A (en) * | 2013-04-02 | 2014-10-15 | 昆山雅森电子材料科技有限公司 | Heat-radiating type solar energy backboard |
| CN103606581A (en) * | 2013-11-25 | 2014-02-26 | 云南云天化股份有限公司 | Solar cell backboard, manufacturing method thereof and solar cell |
| CN104403282B (en) * | 2014-11-12 | 2016-04-06 | 无锡中洁能源技术有限公司 | Solar cell backboard modified PET base material and preparation method thereof |
| 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 |
| CN104505411B (en) * | 2014-12-13 | 2017-02-22 | 乐凯胶片股份有限公司 | Coated type solar battery backboard |
| CN104868003A (en) * | 2015-05-20 | 2015-08-26 | 杭州福斯特光伏材料股份有限公司 | Solar photovoltaic backboard with high steam blocking performance |
| WO2017200054A1 (en) * | 2016-05-20 | 2017-11-23 | 三井化学株式会社 | Curable composition, coating material, coating material for solar cells, coating material for solar cell back sheets, adhesive, adhesive for solar cells, adhesive for solar cell back sheets, method for producing sheet, and curing agent |
| CN107221573B (en) * | 2017-05-19 | 2019-06-21 | 浙江帝恒实业有限公司 | A kind of UV resistance aging solar cell backboard film and preparation method thereof |
| CN107841204A (en) * | 2017-11-03 | 2018-03-27 | 通威太阳能（安徽）有限公司 | A kind of Weather-resistant high reflection rate solar cell backboard film and preparation method thereof |
| CN110452587B (en) * | 2019-08-27 | 2022-04-01 | 广西科技大学 | High-weather-resistance fluorocarbon coating and preparation method thereof |
| CN110885593B (en) * | 2019-12-03 | 2021-08-17 | 苏州赛伍应用技术股份有限公司 | Transparent coating for photovoltaic back plate and photovoltaic back plate |
| CN112266755A (en) * | 2020-09-29 | 2021-01-26 | 乐凯胶片股份有限公司 | Water-based paint, adhesive coating, solar cell back sheet and solar cell |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3645678B2 (en) * | 1997-01-23 | 2005-05-11 | 関東電化工業株式会社 | Fluorine-containing copolymer |
| US9018306B2 (en) * | 2007-06-15 | 2015-04-28 | Dow Corning Corporation | Curable fluorine-containing polymer composition |
| CN101177514B (en) * | 2007-11-08 | 2010-06-09 | 中国乐凯胶片集团公司 | Solar energy battery back board and preparation method thereof |
| CN102208465A (en) * | 2011-05-16 | 2011-10-05 | 杭州福斯特光伏材料股份有限公司 | Packaging material for solar battery component |
-
2011
- 2011-12-22 CN CN 201110435590 patent/CN102496642B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN102496642A (en) | 2012-06-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102496642B (en) | Back sheet of solar cell and preparation method for back sheet | |
| CN101290950B (en) | Back film of solar cell and preparing technique thereof | |
| AU2017312824B2 (en) | Packaging material for photovoltaic module and method for preparing packaging material | |
| CN104070734B (en) | A kind of coated glass with high reflectivity and preparation method thereof | |
| CN104220255B (en) | Multilayer film and the photovoltaic module including this multilayer film | |
| CN103502001B (en) | Multilayer film and the photovoltaic module comprising this multilayer film | |
| CA2673018A1 (en) | Backing sheet for photovoltaic modules and method for repairing same | |
| CN103346182A (en) | Solar panel back film and manufacturing technology thereof | |
| CN109244167A (en) | A kind of enhanced transparent gridding backboard of power | |
| CN108410340A (en) | A kind of black weather-resistant coating and preparation method and application | |
| CN204332987U (en) | A kind of heat radiation solar cell backboard | |
| CN107611223B (en) | A kind of preparation method of high reflection solar cell backboard film | |
| TWI461290B (en) | A laminated body and an organic EL element, a window, and a solar cell module using the same | |
| CN106992254A (en) | Encapsulating structure, its preparation method and its apply | |
| CN103606581A (en) | Solar cell backboard, manufacturing method thereof and solar cell | |
| CN102690477A (en) | Solar cell back panel material and preparation method and product thereof | |
| CN103137732B (en) | A kind of solar cell backboard and a kind of solar module | |
| CN104247043B (en) | Backboard for solar module and preparation method thereof | |
| CN110358443A (en) | A kind of chalk and coated glass backboard and its preparation method and application and double glass solar photovoltaic assemblies | |
| CN102005491B (en) | High-fluorine mixcrystal coating solar photovoltaic cell back film and manufacturing method thereof | |
| CN106159009A (en) | A kind of flexible package composite membrane and manufacture method thereof | |
| CN102403410A (en) | Process for producing solar cell back plate | |
| CN106129258A (en) | Flexible solar battery encapsulation multi-layer compound film and application thereof | |
| CN109860333A (en) | Preparation method of battery back plate | |
| WO2015010503A1 (en) | Solar cell back plate and manufacturing method thereof, and solar cell module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20161021 Address after: 401220 Changshou District of Chongqing economic and Technological Development Zone United Road No. 22 Patentee after: Chongqing Yuntianhua hanen New Material Development Co Ltd Patentee after: Yutianhua Co., Ltd., Yunnan Address before: 657800 Zhaotong City, Yunnan province Shuifu county to jingjiaba Patentee before: Yutianhua Co., Ltd., Yunnan |