CN115926669B - Light EVA adhesive film for solar cell packaging - Google Patents
Light EVA adhesive film for solar cell packaging Download PDFInfo
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- CN115926669B CN115926669B CN202310134314.XA CN202310134314A CN115926669B CN 115926669 B CN115926669 B CN 115926669B CN 202310134314 A CN202310134314 A CN 202310134314A CN 115926669 B CN115926669 B CN 115926669B
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- 239000002313 adhesive film Substances 0.000 title claims abstract description 108
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 49
- 229920005989 resin Polymers 0.000 claims abstract description 61
- 239000011347 resin Substances 0.000 claims abstract description 61
- 239000004743 Polypropylene Substances 0.000 claims description 52
- 238000002156 mixing Methods 0.000 claims description 48
- 239000002994 raw material Substances 0.000 claims description 48
- 238000005187 foaming Methods 0.000 claims description 31
- 239000004611 light stabiliser Substances 0.000 claims description 28
- 238000005266 casting Methods 0.000 claims description 24
- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 claims description 23
- 239000003963 antioxidant agent Substances 0.000 claims description 20
- 238000007599 discharging Methods 0.000 claims description 20
- 238000002360 preparation method Methods 0.000 claims description 20
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims description 17
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 16
- 230000003078 antioxidant effect Effects 0.000 claims description 16
- 239000003431 cross linking reagent Substances 0.000 claims description 16
- 239000012530 fluid Substances 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 15
- 238000005520 cutting process Methods 0.000 claims description 12
- 238000005096 rolling process Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- 238000007493 shaping process Methods 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 10
- 238000010894 electron beam technology Methods 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 238000002844 melting Methods 0.000 claims description 9
- 230000008018 melting Effects 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 9
- FIYMNUNPPYABMU-UHFFFAOYSA-N 2-benzyl-5-chloro-1h-indole Chemical compound C=1C2=CC(Cl)=CC=C2NC=1CC1=CC=CC=C1 FIYMNUNPPYABMU-UHFFFAOYSA-N 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 8
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 claims description 7
- 230000001678 irradiating effect Effects 0.000 claims description 7
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims description 6
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 4
- WOXXJEVNDJOOLV-UHFFFAOYSA-N ethenyl-tris(2-methoxyethoxy)silane Chemical compound COCCO[Si](OCCOC)(OCCOC)C=C WOXXJEVNDJOOLV-UHFFFAOYSA-N 0.000 claims description 4
- 239000004641 Diallyl-phthalate Substances 0.000 claims description 3
- DAKWPKUUDNSNPN-UHFFFAOYSA-N Trimethylolpropane triacrylate Chemical compound C=CC(=O)OCC(CC)(COC(=O)C=C)COC(=O)C=C DAKWPKUUDNSNPN-UHFFFAOYSA-N 0.000 claims description 3
- OKKRPWIIYQTPQF-UHFFFAOYSA-N Trimethylolpropane trimethacrylate Chemical compound CC(=C)C(=O)OCC(CC)(COC(=O)C(C)=C)COC(=O)C(C)=C OKKRPWIIYQTPQF-UHFFFAOYSA-N 0.000 claims description 3
- QUDWYFHPNIMBFC-UHFFFAOYSA-N bis(prop-2-enyl) benzene-1,2-dicarboxylate Chemical compound C=CCOC(=O)C1=CC=CC=C1C(=O)OCC=C QUDWYFHPNIMBFC-UHFFFAOYSA-N 0.000 claims description 3
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims description 3
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims description 3
- 239000002530 phenolic antioxidant Substances 0.000 claims description 2
- 150000007970 thio esters Chemical class 0.000 claims description 2
- 238000003475 lamination Methods 0.000 abstract description 12
- 238000003466 welding Methods 0.000 abstract description 12
- 238000013012 foaming technology Methods 0.000 abstract description 4
- 230000001070 adhesive effect Effects 0.000 abstract description 3
- 241001391944 Commicarpus scandens Species 0.000 abstract description 2
- 239000000853 adhesive Substances 0.000 abstract description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 130
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 130
- 229920001155 polypropylene Polymers 0.000 description 47
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 40
- 229910002092 carbon dioxide Inorganic materials 0.000 description 20
- 239000001569 carbon dioxide Substances 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 18
- 238000001125 extrusion Methods 0.000 description 14
- 238000000034 method Methods 0.000 description 13
- 239000004698 Polyethylene Substances 0.000 description 10
- 229920000573 polyethylene Polymers 0.000 description 10
- 230000008569 process Effects 0.000 description 9
- 150000008301 phosphite esters Chemical class 0.000 description 8
- 238000012360 testing method Methods 0.000 description 6
- 238000005192 partition Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- -1 polypropylene Polymers 0.000 description 3
- 239000005341 toughened glass Substances 0.000 description 3
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- JKBYAWVSVVSRIX-UHFFFAOYSA-N octadecyl 2-(1-octadecoxy-1-oxopropan-2-yl)sulfanylpropanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)C(C)SC(C)C(=O)OCCCCCCCCCCCCCCCCCC JKBYAWVSVVSRIX-UHFFFAOYSA-N 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 235000010354 butylated hydroxytoluene Nutrition 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001227 electron beam curing Methods 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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
- Laminated Bodies (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
The invention belongs to the technical field of adhesives, and particularly relates to a light EVA adhesive film for solar cell packaging. When the EVA adhesive film with low gram weight is practically applied in the photovoltaic industry, the thickness of the EVA adhesive film is reduced, and the adhesive film is burst and broken by the welding strip during lamination, so that the solar cell is easy to break and fail. According to the light EVA adhesive film for packaging the solar cell, the EVA resin is modified, and the foaming technology is adopted, so that the light EVA adhesive film with reliable quality is obtained, the lamination thickness of the EVA adhesive film is increased under the condition that the weight of the EVA adhesive film is not increased, and the situation that the solar cell fails or the whole service life is reduced due to the fact that the adhesive film is burst by a welding strip when lamination occurs can be effectively prevented.
Description
Technical Field
The invention belongs to the technical field of adhesives, and particularly relates to a light EVA adhesive film for solar cell packaging.
Background
The two layers of the rigid solar cell are generally toughened glass, and the structure of EVA material and battery piece is arranged in the middle, so that solar energy can be absorbed and converted into electric energy, and the service life of the rigid solar cell is 25 years, but the conventional rigid solar cell is heavier in weight, and a bracket is required during installation, so that the rigid solar cell is not easy to install and not easy to move, and therefore, the lightweight of the rigid solar cell is a future development trend.
Ethylene-vinyl acetate copolymer (EVA) films are the polymer films which are relatively most widely used at present, and are important components of photovoltaic cell assemblies. Core function of the adhesive film: (1) The buffer protection effect on the battery piece is achieved, and the battery piece is prevented from being subjected to stress hidden cracking in the lamination process or the assembly use process; (2) insulating barrier action; (3) adhesive action. Under the requirement of light weight of the rigid solar cell, development of an EVA adhesive film with low gram weight is one of important means for light weight of the rigid solar cell.
In the production of solar cell modules, welding strips are arranged between every two solar cell pieces, and the solar cell modules adopt EVA adhesive films with low gram weights, so that the following problems can be solved:
the EVA adhesive film is supposed to play a role in buffering in the lamination and production line circulation processes of the solar cell module. In theory, the thickness of the EVA adhesive film needs to be larger than the total thickness of the battery piece and the welding strip. If the gram weight of the EVA adhesive film is reduced, the lamination pressure is unchanged, the thickness of the EVA adhesive film is reduced, the welding belt is most likely to break contact between the EVA adhesive film and toughened glass during lamination, and the risk of battery rupture is increased under huge pressure. In addition, after the thickness of the EVA adhesive film is reduced, the welding belt is easy to lead to the layering of glass and the welding belt, poor appearance is generated, and meanwhile, under the action of a cold and hot cycle, the stress between the solar cell and the welding belt cannot be effectively buffered to generate hidden cracks, so that the output power of the solar cell module is greatly reduced. Therefore, the development of the EVA adhesive film with low gram weight has the difficulty of not only having lower gram weight, but also preventing the welding belt from being out of band and bursting the EVA adhesive film to be contacted with the toughened glass.
The foaming technology is a common means for reducing the weight of the high polymer material, and the EVA foaming product is very mature and has wide application in the fields of light weight, sound insulation and buffering and shock absorption; however, the problem of limiting the further development of the foaming EVA is that the melting range of EVA is low, the highest outdoor temperature of the solar panel in summer can reach about 70 ℃, and the melting temperature of most foaming EVA products is about 70 ℃ or even lower.
Disclosure of Invention
The problems in the prior art are: when the EVA adhesive film with low gram weight is practically applied in the photovoltaic industry, the thickness of the EVA adhesive film is reduced, and the adhesive film is burst and broken by the welding strip during lamination, so that the solar cell is easy to break and fail. Aiming at the problems, the invention provides a light EVA adhesive film for solar cell packaging, which is prepared by modifying EVA resin and foaming the EVA resin through a foaming technology, and has the following specific technical scheme:
a light EVA adhesive film for solar cell packaging comprises the following raw materials in parts by weight:
100 parts of EVA/PP resin;
0.5-2 parts of silane coupling agent;
0.5-3 parts of cross-linking agent;
0.5-2 parts of light stabilizer;
0.1-0.5 part of antioxidant.
Preferably, the preparation method of the EVA/PP resin comprises the following steps:
(1) Uniformly mixing EVA resin, polypropylene (PP) and an antioxidant 1010, adding into an internal mixer, mixing for 5 minutes at 175-185 ℃, adding triallyl isocyanurate, continuously mixing for 5 minutes, discharging to obtain a blend, and standing for 24 hours (h);
(2) Placing the blend after standing on a flat vulcanizing machine at 175-185 ℃, preheating for 5min, maintaining the pressure for 5min, keeping the pressure at 2 megapascals (MPa), cold pressing to room temperature, demolding to obtain a sheet with the thickness of 10 millimeters (mm) and the thickness of 10mm and the thickness of 1mm, sealing the sheet with a Polyethylene (PE) film, and irradiating with an electron beam accelerator to obtain a target product;
the weight ratio of the EVA resin to the PP to the antioxidant 1010 to the triallyl isocyanurate is (75-85) g: (15-25) g:0.2g:2g.
Preferably, the EVA resin has a Vinyl Acetate (VA) content of 28%.
Preferably, the electron beam accelerator irradiates at a dose of 50-150 kilogray (kGy) for a period of 10-30 seconds(s).
Preferably, the silane coupling agent includes at least one of 3- (methacryloxy) propyl trimethoxy silane, vinyl tris (2-methoxyethoxy) silane.
Preferably, the cross-linking agent comprises one or more of tert-butyl peroxy-2-ethylhexyl carbonate, dicumyl peroxide, triallyl isocyanurate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate or diallyl phthalate.
Preferably, the light stabilizer comprises at least one of light stabilizer UV292, light stabilizer UV770 or ultraviolet absorber UVB-2.
Preferably, the antioxidant comprises one or more of phenolic antioxidants, thioester antioxidants and phosphite antioxidants.
The preparation method of the light EVA adhesive film for solar cell packaging comprises the following steps:
s1: sequentially adding EVA/PP resin, a silane coupling agent, a cross-linking agent, a light stabilizer and an antioxidant raw material into a mixer according to the formula amount, and mixing and stirring for 2-3 hours at the temperature of 80 ℃ and the rotating speed of 50-100 revolutions per minute (rpm) to obtain a mixed raw material;
s2: putting the mixed raw material obtained in the step S1 into a double-screw extruder, melting, blending and extruding at the temperature of 90-110 ℃ and the rotating speed of 45-50rpm, and continuously injecting carbon dioxide (CO) into the second section of a charging barrel of the extruder 2 ) Discharging and casting materials in the extruder through a casting film die head, and forming to obtain a primary foaming adhesive film, namely CO 2 The air injection flow rate of the supercritical fluid is 0.01 (milliliter per minute) mL/min; the screw diameter of the extruder is 35 millimeters (mm), and the length-diameter ratio is 40/1;
s3: and (3) pulling the primary foaming adhesive film obtained in the step (S2) to a stretching roller for longitudinal stretching, shaping and solidifying by a cooling roller, and cutting and rolling to obtain the light EVA adhesive film for packaging the solar cell with different thickness.
The invention has the beneficial effects that:
(1) According to the invention, the PP modified EVA resin is adopted, so that on one hand, the melting temperature of the modified EVA resin can be increased, and the obtained EVA adhesive film has better high-low temperature cycle resistance;
(2) The invention uses CO 2 The EVA adhesive film is obtained by the supercritical foaming technology, so that the lamination thickness of the EVA adhesive film can be increased under the condition that the weight of the EVA adhesive film is not increased, and the problem that the solar cell is invalid or the whole service life is reduced due to the fact that a welding belt is protruded to burst the adhesive film during lamination is effectively solved;
(3) According to the invention, the EVA/PP with the EVA and PP cross-linked resin structure is obtained by adopting an electron beam curing technology, the method is clean and efficient, free radicals in the obtained EVA adhesive film are not remained, the curing is faster and more thorough, and the stability of the obtained EVA adhesive film is better;
(4) The light weight of the foaming product can prolong the service life of the foaming product on a solar cell, and the foaming product is prepared by CO 2 The EVA adhesive film prepared by the method has uniform cells, no pollution, good supporting and reinforcing effects and uniform micro cells, other auxiliary ingredients in the formula of the EVA adhesive film can be more uniformly dispersed, the phenomenon of fish eyes of the EVA adhesive film in the lamination process can be reduced, the mechanical properties such as the tensile strength of the obtained EVA adhesive film can be increased, and the use stability and the service life of a solar cell module can be further improved.
Detailed Description
The present invention will be described in detail with reference to examples. It is to be understood that the following examples are illustrative of embodiments of the present invention and are not intended to limit the scope of the invention.
The EVA resin used in the following examples and comparative examples in the present invention was the trademark E282PV produced by Korean company;
the PP resin used in the following examples of the present invention was the brand 1300 produced by Yanshan petrochemical company;
the phosphite used in the following examples and comparative examples in the present invention was antioxidant 1010.
The PE film for sealing during irradiation of the EVA/PP resin sheet is purchased from a new wetting protection film Co., ltd. In the tin-free market, and the product number is XR201803011010.
The twin-screw extruders used in the following examples and comparative examples in the present invention had screw diameters of 35mm and aspect ratios of 40/1.
Example 1
A light EVA adhesive film for solar cell packaging consists of the following raw materials in parts by weight:
100 parts of EVA/PP resin;
1.2 parts of 3- (methacryloyloxy) propyl trimethoxysilane;
1.5 parts of tert-butyl peroxy-2-ethylhexyl carbonate;
1 part of triallyl isocyanurate;
light stabilizer UV292 1 part;
0.3 parts of phosphite ester.
The preparation method of the light EVA adhesive film for solar cell packaging comprises the following steps:
s1: according to the formula amount, sequentially adding EVA/PP resin, a silane coupling agent, a cross-linking agent, a light stabilizer and an antioxidant raw material into a mixer, and mixing and stirring for 2 hours at the temperature of 80 ℃ and the rotating speed of 100rpm to obtain a mixed raw material;
s2: putting the mixed raw material obtained in the step S1 into a double-screw extruder, carrying out melt blending and extrusion at the rotating speed of 50rpm, wherein the temperature of each section partition of the double-screw extruder is 90 ℃, 100 ℃ and 110 ℃, and supercritical fluid CO is continuously injected into the second section of a charging barrel of the extruder in the extrusion process 2 Discharging and casting materials in the extruder through a casting film die head, and forming to obtain a primary foaming adhesive film, namely CO 2 The gas injection flow rate of the supercritical fluid is 0.01mL/min; the screw diameter of the extruder is 35mm, and the length-diameter ratio is 40/1;
s3: and (3) pulling the primary foaming adhesive film obtained in the step (S2) to a stretching roller for longitudinal stretching, and cutting and rolling after the cooling roller is shaped and solidified to obtain the light EVA adhesive film with the thickness of 600 micrometers (mu m) for packaging the solar cell.
The preparation method of the EVA/PP resin comprises the following steps:
uniformly mixing EVA resin, PP and antioxidant 1010, and adding into an internal mixer, wherein the weight ratio of the EVA resin to the PP to the antioxidant 1010 to the triallyl isocyanurate is 80g:20g:0.2g:2g, after mixing for 5min at 180 ℃, adding triallyl isocyanurate, continuing mixing for 5min, and discharging; after standing for 24 hours, placing the blend on a flat vulcanizing machine at 180 ℃ for preheating for 5 minutes, maintaining the pressure for 5 minutes, keeping the pressure at 2MPa, cold pressing to room temperature, demolding to obtain a sheet with the thickness of 10mm multiplied by 1mm, sealing the sheet by a Polyethylene (PE) film, and then placing the sheet in an electron beam accelerator for irradiation, wherein the irradiation dose is 75kGy, and the irradiation time is 22s, so as to obtain a target product with the gel content of 31.4%.
Example 2
A light EVA adhesive film for solar cell packaging consists of the following raw materials in parts by weight:
100 parts of EVA/PP resin;
0.5 parts of vinyltris (2-methoxyethoxy) silane;
1.5 parts of tert-butyl peroxy-2-ethylhexyl carbonate;
1.5 parts of diallyl phthalate;
0.5 parts of light stabilizer UV 770;
0.1 part of phosphite ester.
A preparation method of a light EVA adhesive film for solar cell packaging comprises the following steps:
s1: according to the formula amount, sequentially adding EVA/PP resin, a silane coupling agent, a cross-linking agent, a light stabilizer and an antioxidant raw material into a mixer, and mixing and stirring for 3 hours at the temperature of 80 ℃ and the rotating speed of 50rpm to obtain a mixed raw material;
s2: putting the mixed raw material obtained in the step S1 into a double-screw extruder, carrying out melt blending and extrusion at the rotating speed of 45rpm, wherein the partition temperature of each section of the double-screw extruder is 90 ℃, 100 ℃, 110 ℃ and 110 ℃, and supercritical fluid CO is continuously injected into the second section of a charging barrel of the extruder in the extrusion process 2 Discharging and casting materials in the extruder through a casting film die head, and forming to obtain a primary foaming adhesive film, namely CO 2 The gas injection flow rate of the supercritical fluid is 0.01mL/min; the screw diameter of the extruder is 35mm, and the length-diameter ratio is 40/1;
s3: and (3) pulling the primary foaming adhesive film obtained in the step (S2) to a stretching roller for longitudinal stretching, shaping and solidifying by a cooling roller, and cutting and rolling to obtain the light EVA adhesive film with the thickness of 600 mu m for packaging the solar cell.
The preparation method of the EVA/PP resin comprises the following steps:
uniformly mixing EVA resin, PP and antioxidant 1010, and adding into an internal mixer, wherein the weight ratio of the EVA to the PP to the antioxidant 1010 to the triallyl isocyanurate is 75g:25g:0.2g:2g, mixing for 5min at 185 ℃, adding triallyl isocyanurate, mixing for 5min, and discharging; after standing for 24 hours, placing the blend on a flat vulcanizing machine at 185 ℃ for preheating for 5 minutes, maintaining the pressure for 5 minutes, keeping the pressure at 2MPa, cold pressing to room temperature, demolding to obtain a sheet with the thickness of 10mm multiplied by 1mm, sealing the sheet by a PE film, irradiating the sheet by using an electron beam accelerator, wherein the irradiation dose is 90kGy, and the irradiation time is 20 seconds, thus obtaining the target product with the gel content of 30.8%.
Example 3
A light EVA adhesive film for solar cell packaging consists of the following raw materials in parts by weight:
100 parts of EVA/PP resin;
2 parts of vinyl trimethoxy silane;
1 part of dicumyl peroxide;
1 part of trimethylolpropane trimethacrylate;
uv absorber UVB-2 2 parts;
0.4 part of 2, 6-di-tert-butyl-p-cresol;
0.1 part of phosphite ester.
The preparation method of the light EVA adhesive film for solar cell packaging comprises the following steps:
s1: according to the formula amount, sequentially adding EVA/PP resin, a silane coupling agent, a cross-linking agent, a light stabilizer and an antioxidant raw material into a mixer, and mixing and stirring for 3 hours at the temperature of 80 ℃ and the rotating speed of 60rpm to obtain a mixed raw material;
s2: putting the mixed raw material obtained in the step S1 into a double-screw extruder, carrying out melt blending and extrusion at the rotating speed of 50rpm, wherein the partition temperature of each section of the double-screw extruder is 90 ℃, 100 ℃ and 100 ℃, and supercritical fluid CO is continuously injected into the second section of a charging barrel of the extruder in the extrusion process 2 Discharging and casting materials in the extruder through a casting film die head, and forming to obtain a primary foaming adhesive film, namely CO 2 Injection of supercritical fluidThe air flow rate is 0.01mL/min; the screw diameter of the extruder is 35mm, and the length-diameter ratio is 40/1;
s3: and (3) pulling the primary foaming adhesive film obtained in the step (S2) to a stretching roller for longitudinal stretching, shaping and solidifying by a cooling roller, and cutting and rolling to obtain the light EVA adhesive film with the thickness of 600 mu m for packaging the solar cell.
The preparation method of the EVA/PP resin comprises the following steps:
uniformly mixing EVA resin, PP and antioxidant 1010, and adding into an internal mixer, wherein the weight ratio of the EVA resin to the PP to the antioxidant 1010 to the triallyl isocyanurate is 85g:15g:0.2g:2g, after mixing for 5min at 175 ℃, adding triallyl isocyanurate, continuing mixing for 5min, and discharging; after standing for 24 hours, placing the blend on a flat vulcanizing machine at 175 ℃, preheating for 5 minutes, maintaining the pressure for 5 minutes, keeping the pressure at 2MPa, cold pressing to room temperature, demolding to obtain a sheet with the thickness of 10mm multiplied by 1mm, sealing the sheet by a PE film, irradiating the sheet by using an electron beam accelerator, wherein the irradiation dose is 50kGy, and the irradiation time is 30 seconds, so as to obtain a target product with the gel content of 33.7%.
Example 4
A light EVA adhesive film for solar cell packaging consists of the following raw materials in parts by weight:
100 parts of EVA/PP resin;
1 part of vinyl trimethoxy silane;
0.5 parts of dicumyl peroxide;
0.7 parts of light stabilizer UV 770;
0.2 part of phosphite ester.
The preparation method of the light EVA adhesive film for solar cell packaging comprises the following steps:
s1: according to the formula amount, sequentially adding EVA/PP resin, a silane coupling agent, a cross-linking agent, a light stabilizer and an antioxidant raw material into a mixer, and mixing and stirring for 2 hours at the temperature of 80 ℃ and the rotating speed of 90rpm to obtain a mixed raw material;
s2: putting the mixed raw material obtained in the step S1 into a double-screw extruder, carrying out melt blending and extrusion at the rotating speed of 45rpm, wherein the temperature of each section of the double-screw extruder is 90 ℃, 100 ℃, 110 ℃ and 110 ℃, and during the extrusion process, the materials of the extruder are mixedThe second section of the cylinder is continuously injected with supercritical fluid CO 2 Discharging and casting materials in the extruder through a casting film die head, and forming to obtain a primary foaming adhesive film, namely CO 2 The gas injection flow rate of the supercritical fluid is 0.01mL/min; the screw diameter of the extruder is 35mm, and the length-diameter ratio is 40/1;
s3: and (3) pulling the primary foaming adhesive film obtained in the step (S2) to a stretching roller for longitudinal stretching, shaping and solidifying by a cooling roller, and cutting and rolling to obtain the light EVA adhesive film with the thickness of 600 mu m for packaging the solar cell.
The preparation method of the EVA/PP resin comprises the following steps:
uniformly mixing EVA resin, PP and antioxidant 1010, and adding into an internal mixer, wherein the weight ratio of the EVA resin to the PP to the antioxidant 1010 to the triallyl isocyanurate is 78g:22g:0.2g:2g, after mixing for 5min at 180 ℃, adding triallyl isocyanurate, continuing mixing for 5min, and discharging; after standing for 24 hours, placing the blend on a flat vulcanizing machine at 180 ℃ for preheating for 5 minutes, maintaining the pressure for 5 minutes, keeping the pressure at 2MPa, cold pressing to room temperature, demolding to obtain a sheet with the thickness of 10mm multiplied by 1mm, sealing the sheet by a PE film, irradiating the sheet by using an electron beam accelerator, wherein the irradiation dose is 150kGy, and the irradiation time is 10 seconds, so as to obtain a target product with the gel content of 38.5%.
Example 5
A light EVA adhesive film for solar cell packaging consists of the following raw materials in parts by weight:
100 parts of EVA/PP resin;
1.5 parts of vinyltris (2-methoxyethoxy) silane;
0.5 parts of dicumyl peroxide;
1.5 parts of ultraviolet absorber UVB-2;
0.4 part of dioctadecyl thiodipropionate.
The preparation method of the light EVA adhesive film for solar cell packaging comprises the following steps:
s1: according to the formula amount, sequentially adding EVA/PP resin, a silane coupling agent, a cross-linking agent, a light stabilizer and an antioxidant raw material into a mixer, and mixing and stirring for 2.5 hours at the temperature of 80 ℃ and the rotation speed of 70rpm to obtain a mixed raw material;
s2: putting the mixed raw material obtained in the step S1 into a double-screw extruder, melting, blending and extruding at the temperature of 90 ℃, 100 ℃, 105 ℃ and the rotating speed of 50rpm in each section, and continuously injecting supercritical fluid CO in the second section of the extruder charging barrel 2 Discharging and casting materials in the extruder through a casting film die head, and forming to obtain a primary foaming adhesive film, namely CO 2 The gas injection flow rate of the supercritical fluid is 0.01mL/min; the screw diameter of the extruder is 35mm, and the length-diameter ratio is 40/1;
s3: pulling the primary foaming adhesive film obtained in the step S2 to a stretching roller for longitudinal stretching, shaping and solidifying by a cooling roller, and cutting and rolling to obtain the light EVA adhesive film with the thickness of 600 mu m for packaging the solar cell;
the preparation method of the EVA/PP resin comprises the following steps:
uniformly mixing EVA resin, PP and antioxidant 1010, and adding into an internal mixer, wherein the weight ratio of the EVA to the PP to the antioxidant 1010 to the triallyl isocyanurate is 82g:18g:0.2g:2g, after mixing for 5min at 178 ℃, adding triallyl isocyanurate, continuing mixing for 5min, and discharging; after standing for 24 hours, placing the blend on a flat vulcanizing machine at 178 ℃, preheating for 5 minutes, maintaining the pressure for 5 minutes, keeping the pressure at 2MPa, cold pressing to room temperature, demolding to obtain a sheet with the thickness of 10mm multiplied by 1mm, sealing the sheet by a PE film, irradiating the sheet by using an electron beam accelerator, wherein the irradiation dose is 130kGy, and the irradiation time is 15 seconds, so as to obtain a target product with the gel content of 37.8%.
Example 6
A light EVA adhesive film for solar cell packaging consists of the following raw materials in parts by weight:
100 parts of EVA/PP resin;
1.2 parts of vinyl trimethoxy silane;
1 part of dicumyl peroxide;
0.5 parts of trimethylolpropane triacrylate;
light stabilizer UV292 1 part;
0.4 part of dioctadecyl thiodipropionate.
The preparation method of the light EVA adhesive film for solar cell packaging comprises the following steps:
s1: according to the formula amount, sequentially adding EVA/PP resin, a silane coupling agent, a cross-linking agent, a light stabilizer and an antioxidant raw material into a mixer, and mixing and stirring for 2.5 hours at the temperature of 80 ℃ and the rotating speed of 80rpm to obtain a mixed raw material;
s2: putting the mixed raw material obtained in the step S1 into a double-screw extruder, carrying out melt blending and extrusion at the rotating speed of 50rpm, wherein the partition temperature of each section of the double-screw extruder is 90 ℃, 100 ℃ and 110 ℃, and supercritical fluid CO is continuously injected into the second section of a charging barrel of the extruder in the extrusion process 2 Discharging and casting materials in the extruder through a casting film die head, and forming to obtain a primary foaming adhesive film, namely CO 2 The gas injection flow rate of the supercritical fluid is 0.01mL/min; the screw diameter of the extruder is 35mm, and the length-diameter ratio is 40/1;
s3: and (3) pulling the primary foaming adhesive film obtained in the step (S2) to a stretching roller for longitudinal stretching, shaping and solidifying by a cooling roller, and cutting and rolling to obtain the light EVA adhesive film with the thickness of 600 mu m for packaging the solar cell.
The preparation method of the EVA/PP resin comprises the following steps:
uniformly mixing EVA resin, PP and antioxidant 1010, and adding into an internal mixer, wherein the weight ratio of the EVA resin to the PP to the antioxidant 1010 to the triallyl isocyanurate is 80g:20g:0.2g:2g, after mixing for 5min at 182 ℃, adding triallyl isocyanurate, continuing mixing for 5min, and discharging; after standing for 24 hours, placing the blend on a flat vulcanizing machine at 182 ℃, preheating for 5 minutes, maintaining the pressure for 5 minutes, keeping the pressure at 2MPa, cold pressing to room temperature, demolding to obtain a sheet with the thickness of 10mm multiplied by 1mm, sealing the sheet by a PE film, irradiating the sheet by using an electron beam accelerator, wherein the irradiation dose is 100kGy, and the irradiation time is 20 seconds, thereby obtaining a target product with the gel content of 35.6%.
Comparative example 1
An EVA adhesive film for solar cell encapsulation comprises the following raw materials in parts by weight:
100 parts of EVA resin;
1.2 parts of 3- (methacryloyloxy) propyl trimethoxysilane;
1.5 parts of tert-butyl peroxy-2-ethylhexyl carbonate;
1 part of triallyl isocyanurate;
light stabilizer UV292 1 part;
0.3 parts of phosphite ester.
The preparation method of the EVA adhesive film for solar cell packaging comprises the following steps:
s1: according to the formula amount, sequentially adding EVA resin, a silane coupling agent, a cross-linking agent, a light stabilizer and an antioxidant raw material into a mixer, and mixing and stirring for 2 hours at the temperature of 80 ℃ and the rotating speed of 100rpm to obtain a mixed raw material;
s2: putting the mixed raw material obtained in the step S1 into a double-screw extruder, carrying out melt blending and extrusion at the rotating speed of 50rpm, wherein the temperature of each section of the double-screw extruder is 90 ℃, 100 ℃ and 110 ℃, discharging and casting through a casting film die head, and forming to obtain a primary adhesive film;
s3: and (3) pulling the primary adhesive film obtained in the step (S2) to a stretching roller for longitudinal stretching, shaping and solidifying by a cooling roller, and cutting and rolling to obtain the EVA adhesive film for packaging the solar cell, wherein the thickness of the EVA adhesive film is 600 mu m.
Comparative example 2 the same as example 1 was repeated except that comparative example 2 replaced the EVA/PP resin of example 1 with an equivalent weight fraction of EVA resin to PP resin composition, the weight ratio of EVA resin to PP resin being 4:1.
Comparative example 3
An embossed EVA adhesive film for solar cell packaging is prepared from the following raw materials in parts by weight:
100 parts of EVA resin;
1.2 parts of 3- (methacryloyloxy) propyl trimethoxysilane;
1.5 parts of tert-butyl peroxy-2-ethylhexyl carbonate;
1 part of triallyl isocyanurate;
light stabilizer UV292 1 part;
0.3 parts of phosphite ester.
The preparation method of the embossed EVA adhesive film for solar cell packaging comprises the following steps:
s1: according to the formula amount, adding EVA resin, a silane coupling agent, a cross-linking agent, a light stabilizer and an antioxidant raw material into a mixer according to the weight ratio, and mixing and stirring for 2 hours at the temperature of 80 ℃ and the rotating speed of 100rpm to obtain a mixed raw material;
s2: putting the mixed raw materials obtained in the step S1 into a double-screw extruder, carrying out melt blending and extrusion at the rotating speed of 50rpm, wherein the temperature of each section of the double-screw extruder is 90 ℃, 100 ℃ and 110 ℃, discharging and casting through a casting film die head, and forming to obtain a primary adhesive film;
s3: and (3) pulling the primary adhesive film obtained in the step (S2) to a stretching roller for longitudinal stretching, hot-pressing, embossing at the film temperature of 70 ℃, shaping and solidifying by a cooling roller, and cutting and rolling to obtain the embossed EVA adhesive film for packaging the solar cell, wherein the thickness of the embossed EVA adhesive film is 600 mu m.
Comparative example 4 the same as example 1, except that comparative example 4 did not inject CO into the extruder barrel 2 Supercritical fluid.
Comparative example 5
A light EVA adhesive film for solar cell packaging consists of the following raw materials in parts by weight:
100 parts of EVA/PP resin;
1.2 parts of 3- (methacryloyloxy) propyl trimethoxysilane;
1.5 parts of tert-butyl peroxy-2-ethylhexyl carbonate;
1 part of triallyl isocyanurate;
light stabilizer UV292 1 part;
0.3 parts of phosphite ester;
6.5 parts of AC foaming agent.
The preparation method of the light EVA adhesive film for solar cell packaging comprises the following steps:
s1: according to the formula amount, sequentially adding EVA/PP resin, a silane coupling agent, a cross-linking agent, a light stabilizer, an antioxidant and a foaming agent raw material into a mixer, and mixing and stirring for 2 hours at the temperature of 80 ℃ and the rotating speed of 100rpm to obtain a mixed raw material;
s2: putting the mixed raw material obtained in the step S1 into a double-screw extruder, carrying out melt blending and extrusion at the rotating speed of 50rpm, wherein the temperature of each section of the double-screw extruder is 160 ℃, 175 ℃, 190 ℃ and 200 ℃, discharging and casting through a casting film die head, and forming to obtain a primary foaming adhesive film;
s3: and (3) pulling the primary foaming adhesive film obtained in the step (S2) to a stretching roller for longitudinal stretching, shaping and solidifying by a cooling roller, and cutting and rolling to obtain the light EVA adhesive film with the thickness of 600 mu m for packaging the solar cell.
The preparation method of the EVA/PP resin is the same as that of the specific example 1.
Comparative example 6
The foaming EVA adhesive film for solar cell packaging consists of the following raw materials in parts by weight:
100 parts of EVA resin;
1.2 parts of 3- (methacryloyloxy) propyl trimethoxysilane;
1.5 parts of tert-butyl peroxy-2-ethylhexyl carbonate;
1 part of triallyl isocyanurate;
light stabilizer UV292 1 part;
0.3 parts of phosphite ester.
The preparation method of the foaming EVA adhesive film for solar cell packaging comprises the following steps:
s1: according to the formula amount, sequentially adding EVA resin, a silane coupling agent, a cross-linking agent, a light stabilizer and an antioxidant raw material into a mixer, and mixing and stirring for 2 hours at the temperature of 80 ℃ and the rotating speed of 100rpm to obtain a mixed raw material;
s2: putting the mixed raw material obtained in the step S1 into a double-screw extruder, carrying out melt blending and extrusion at the rotating speed of 50rpm, wherein the partition temperature of each section of the double-screw extruder is 70 ℃, 80 ℃ and 90 ℃, and continuously injecting supercritical fluid CO into the second section of a charging barrel of the extruder 2 Discharging and casting materials to an extruder through a casting film die head, and forming to obtain a primary foaming adhesive film, namely CO 2 The gas injection flow rate of the supercritical fluid is 0.008mL/min;
s3: and (3) pulling the primary foaming adhesive film obtained in the step (S2) to a stretching roller for longitudinal stretching, shaping and solidifying by a cooling roller, and cutting and rolling to obtain the foaming EVA adhesive film for packaging the solar cell, wherein the thickness of the foaming EVA adhesive film is 600 mu m.
Performance testing
The light EVA adhesive films for solar cell packaging obtained in examples 1 to 6 and comparative examples 1 to 6 were subjected to the performance test, and the test results are shown in Table 1.
The test method comprises the following steps:
(1) Unit gram weight: the gram weight per unit area of the EVA adhesive film with the thickness of 600 mu m.
(2) Water vapor transmission rate: the test was carried out with reference to the method described in GB/T1037-2021.
(3) Melting temperature: the DSC test is adopted, and the test method comprises the following steps: weighing 5-10mg of sample, placing in a crucible, keeping the temperature for 3min, then cooling to 30 ℃ at the cooling rate of 10 ℃/min, then heating to 180 ℃ at the cooling rate of 10 ℃/min, and recording a DSC temperature rise and fall curve.
(4) Elongation at break, tensile strength: the test was conducted with reference to GB/T1040-2018 plastic tensile test method at a test speed of 500mm/min.
TABLE 1
| Performance of | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Comparative example 5 | Comparative example 6 |
| Unit grammage (g/m) 2 ) | 317 | 315 | 318 | 316 | 318 | 317 | 576 | 322 | 528 | 570 | 407 | 311 |
| Moisture vapor transmission rate (g/(m) 2 ·24h)) | 9.3 | 8.9 | 9.7 | 9.9 | 9.5 | 9.5 | 14.1 | 13.8 | 14.1 | 9.2 | 9.9 | 14.6 |
| Melting temperature (. Degree. C.) | 93.7 | 95.2 | 90.8 | 92.1 | 90.3 | 91.1 | 69.8 | 78.3 double Tg peak | 70.0 | 95.2 | 92.6 | 66.4 |
| Elongation at break (%) | 374 | 356 | 383 | 344 | 359 | 331 | 898 | 289 | 754 | 664 | 304 | 433 |
| Tensile Strength (MPa) | 19.8 | 20.0 | 17.5 | 17.1 | 17.6 | 17.6 | 15.5 | 14.1 | 14.9 | 21.2 | 17.3 | 14.6 |
The data in table 1 show that the light EVA adhesive film for solar cell packaging, which is obtained by the invention, not only solves the problems that the thickness of the EVA adhesive film is reduced, and a welding belt can prominently burst the adhesive film during lamination when the EVA adhesive film with low gram weight is actually applied to the photovoltaic industry in the prior art, so that the solar cell is invalid or the whole service life is reduced. The light EVA adhesive film for solar cell encapsulation has higher melting temperature and is very beneficial to prolonging the service life of the solar cell.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (7)
1. The light EVA adhesive film for packaging the solar cell is characterized by comprising the following raw materials in parts by weight:
100 parts of EVA/PP resin;
0.5-2 parts of silane coupling agent;
0.5-3 parts of cross-linking agent;
0.5-2 parts of light stabilizer;
0.1-0.5 part of antioxidant;
the EVA/PP resin is prepared by the following steps:
(1) Uniformly mixing EVA resin, PP and antioxidant 1010, adding into an internal mixer, mixing for 5min at 175-185 ℃, adding triallyl isocyanurate, continuously mixing for 5min, discharging to obtain a blend, and standing for 24h;
(2) Placing the blend after standing on a flat vulcanizing machine at 175-185 ℃, preheating for 5min, maintaining the pressure for 5min, keeping the pressure at 2MPa, cold pressing to room temperature, demolding to obtain a sheet with the thickness of 10mm multiplied by 1mm, sealing the sheet with a PE film, and irradiating with an electron beam accelerator to obtain a target product;
the weight ratio of EVA to PP to antioxidant 1010 to triallyl isocyanurate is (75-85) g: (15-25) g:0.2g:2g;
the preparation method of the light EVA adhesive film for solar cell packaging comprises the following steps of:
s1: according to the formula amount, sequentially adding EVA/PP resin, a silane coupling agent, a cross-linking agent, a light stabilizer and an antioxidant raw material into a mixer, and mixing and stirring at the temperature of 80 ℃ and the rotating speed of 50-100rpm for 2-3 hours to obtain a mixed raw material;
s2: putting the mixed raw material obtained in the step S1 into a double-screw extruder, melting, blending and extruding at the temperature of 90-110 ℃ and the rotating speed of 45-50rpm, and continuously injecting CO into the second section of a charging barrel of the extruder 2 Discharging and casting materials in the extruder through a casting film die head, and forming to obtain a primary foaming adhesive film, namely CO 2 The gas injection flow rate of the supercritical fluid is 0.01mL/min; the screw diameter of the extruder is 35mm, and the length-diameter ratio is 40/1;
s3: and (3) pulling the primary foaming adhesive film obtained in the step (S2) to a stretching roller for longitudinal stretching, shaping and solidifying by a cooling roller, and cutting and rolling to obtain the light EVA adhesive film for packaging the solar cell with different thickness.
2. The lightweight EVA film for solar cell packaging according to claim 1, wherein: the VA content in the EVA resin is 28%.
3. The lightweight EVA film for solar cell packaging according to claim 1, wherein: the irradiation dose is 50-150kGy, and the irradiation time is 10-30s.
4. The lightweight EVA film for solar cell packaging according to claim 1, wherein: the silane coupling agent comprises at least one of 3- (methacryloxy) propyl trimethoxy silane, vinyl trimethoxy silane and vinyl tri (2-methoxyethoxy) silane.
5. The lightweight EVA film for solar cell packaging according to claim 1, wherein: the cross-linking agent comprises one or more of tert-butyl peroxy-2-ethylhexyl carbonate, dicumyl peroxide, triallyl isocyanurate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate or diallyl phthalate.
6. The lightweight EVA film for solar cell packaging according to claim 1, wherein: the light stabilizer includes at least one of light stabilizer UV292, light stabilizer UV770 or ultraviolet absorber UVB-2.
7. The lightweight EVA film for solar cell packaging according to claim 1, wherein: the antioxidant comprises one or more of phenolic antioxidants, thioester antioxidants and phosphite antioxidants.
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| CN103224758B (en) * | 2013-01-29 | 2015-04-22 | 中科院广州化学有限公司 | EVA adhesive film for solar cell packaging and preparation method thereof |
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| 聚合物共混体系敏化辐射交联的研究;杨慧丽等;辐射研究与辐射工艺学报;第16卷(第02期);第84-88页 * |
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