CN114231210A - High-gain grid adhesive film for photovoltaic module, composite EVA resin and production process thereof - Google Patents
High-gain grid adhesive film for photovoltaic module, composite EVA resin and production process thereof Download PDFInfo
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- CN114231210A CN114231210A CN202111664549.7A CN202111664549A CN114231210A CN 114231210 A CN114231210 A CN 114231210A CN 202111664549 A CN202111664549 A CN 202111664549A CN 114231210 A CN114231210 A CN 114231210A
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- Prior art keywords
- adhesive film
- eva
- grid
- eva resin
- photovoltaic module
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- 239000002313 adhesive film Substances 0.000 title claims abstract description 78
- 229920005989 resin Polymers 0.000 title claims abstract description 43
- 239000011347 resin Substances 0.000 title claims abstract description 43
- 239000002131 composite material Substances 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 claims abstract description 59
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 59
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 59
- 239000000155 melt Substances 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 239000010410 layer Substances 0.000 claims description 26
- 238000005266 casting Methods 0.000 claims description 13
- 239000008187 granular material Substances 0.000 claims description 10
- 239000004611 light stabiliser Substances 0.000 claims description 9
- 239000002318 adhesion promoter Substances 0.000 claims description 8
- 239000003431 cross linking reagent Substances 0.000 claims description 8
- 239000003999 initiator Substances 0.000 claims description 8
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 7
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 6
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 claims description 4
- 239000012752 auxiliary agent Substances 0.000 claims description 4
- 238000004049 embossing Methods 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 239000002356 single layer Substances 0.000 claims description 3
- HGXJDMCMYLEZMJ-UHFFFAOYSA-N (2-methylpropan-2-yl)oxy 2,2-dimethylpropaneperoxoate Chemical compound CC(C)(C)OOOC(=O)C(C)(C)C HGXJDMCMYLEZMJ-UHFFFAOYSA-N 0.000 claims description 2
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 2
- 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 2
- 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 2
- 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 2
- WGRZHLPEQDVPET-UHFFFAOYSA-N 2-methoxyethoxysilane Chemical compound COCCO[SiH3] WGRZHLPEQDVPET-UHFFFAOYSA-N 0.000 claims description 2
- FRIBMENBGGCKPD-UHFFFAOYSA-N 3-(2,3-dimethoxyphenyl)prop-2-enal Chemical compound COC1=CC=CC(C=CC=O)=C1OC FRIBMENBGGCKPD-UHFFFAOYSA-N 0.000 claims description 2
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 2
- 239000004342 Benzoyl peroxide Substances 0.000 claims description 2
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 2
- YIVJZNGAASQVEM-UHFFFAOYSA-N Lauroyl peroxide Chemical compound CCCCCCCCCCCC(=O)OOC(=O)CCCCCCCCCCC YIVJZNGAASQVEM-UHFFFAOYSA-N 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 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 2
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 2
- XITRBUPOXXBIJN-UHFFFAOYSA-N bis(2,2,6,6-tetramethylpiperidin-4-yl) decanedioate Chemical compound C1C(C)(C)NC(C)(C)CC1OC(=O)CCCCCCCCC(=O)OC1CC(C)(C)NC(C)(C)C1 XITRBUPOXXBIJN-UHFFFAOYSA-N 0.000 claims description 2
- BLCKNMAZFRMCJJ-UHFFFAOYSA-N cyclohexyl cyclohexyloxycarbonyloxy carbonate Chemical compound C1CCCCC1OC(=O)OOC(=O)OC1CCCCC1 BLCKNMAZFRMCJJ-UHFFFAOYSA-N 0.000 claims description 2
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 claims description 2
- 125000005442 diisocyanate group Chemical group 0.000 claims description 2
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 claims description 2
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 2
- GHISRQJMYXYQKU-UHFFFAOYSA-N n'-(3-methoxysilylpropyl)ethane-1,2-diamine Chemical compound CO[SiH2]CCCNCCN GHISRQJMYXYQKU-UHFFFAOYSA-N 0.000 claims description 2
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 claims description 2
- 150000001451 organic peroxides Chemical class 0.000 claims description 2
- BWJUFXUULUEGMA-UHFFFAOYSA-N propan-2-yl propan-2-yloxycarbonyloxy carbonate Chemical compound CC(C)OC(=O)OOC(=O)OC(C)C BWJUFXUULUEGMA-UHFFFAOYSA-N 0.000 claims description 2
- 229940116351 sebacate Drugs 0.000 claims description 2
- CXMXRPHRNRROMY-UHFFFAOYSA-L sebacate(2-) Chemical compound [O-]C(=O)CCCCCCCCC([O-])=O CXMXRPHRNRROMY-UHFFFAOYSA-L 0.000 claims description 2
- GJBRNHKUVLOCEB-UHFFFAOYSA-N tert-butyl benzenecarboperoxoate Chemical compound CC(C)(C)OOC(=O)C1=CC=CC=C1 GJBRNHKUVLOCEB-UHFFFAOYSA-N 0.000 claims description 2
- ALVYUZIFSCKIFP-UHFFFAOYSA-N triethoxy(2-methylpropyl)silane Chemical compound CCO[Si](CC(C)C)(OCC)OCC ALVYUZIFSCKIFP-UHFFFAOYSA-N 0.000 claims description 2
- DQZNLOXENNXVAD-UHFFFAOYSA-N trimethoxy-[2-(7-oxabicyclo[4.1.0]heptan-4-yl)ethyl]silane Chemical compound C1C(CC[Si](OC)(OC)OC)CCC2OC21 DQZNLOXENNXVAD-UHFFFAOYSA-N 0.000 claims description 2
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 claims 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims 1
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 claims 1
- 150000001412 amines Chemical class 0.000 claims 1
- 239000012528 membrane Substances 0.000 claims 1
- 238000010345 tape casting Methods 0.000 claims 1
- 238000004132 cross linking Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 6
- 238000010030 laminating Methods 0.000 abstract description 4
- 238000004806 packaging method and process Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 4
- 238000010894 electron beam technology Methods 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- HQYALQRYBUJWDH-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical compound CCC[Si](OC)(OC)OC HQYALQRYBUJWDH-UHFFFAOYSA-N 0.000 description 2
- 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 description 1
- 241000887125 Chaptalia nutans Species 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000012792 core layer Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- RRJTYGXYWTVHDE-UHFFFAOYSA-N tributyl(ethenyl)silane Chemical compound CCCC[Si](CCCC)(CCCC)C=C RRJTYGXYWTVHDE-UHFFFAOYSA-N 0.000 description 1
- -1 trimethylolpropane triethylacrylate Chemical compound 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
- C09J123/04—Homopolymers or copolymers of ethene
- C09J123/08—Copolymers of ethene
- C09J123/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C09J123/0853—Vinylacetate
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/10—Adhesives in the form of films or foils without carriers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/33—Applications of adhesives in processes or use of adhesives in the form of films or foils for batteries or fuel cells
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2423/00—Presence of polyolefin
- C09J2423/04—Presence of homo or copolymers of ethene
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Photovoltaic Devices (AREA)
- Adhesive Tapes (AREA)
- Laminated Bodies (AREA)
Abstract
The invention belongs to the technical field of packaging adhesive films, and particularly relates to a high-gain grid adhesive film for a photovoltaic module, composite EVA resin and a production process thereof, wherein the high-gain grid adhesive film for the photovoltaic module comprises the following components: the contact surface of the base film and the grid reflecting layer is an EVA (ethylene vinyl acetate) adhesive film; the melt index of the EVA adhesive film is 6-15 g/10 min. The high-gain grid adhesive film for the photovoltaic module disclosed by the invention is prepared by mixing various EVA resins with different melt indexes in proportion, so that the processing speed regulation is ensured while the flowability of the EVA resin is reduced, the flowability of the adhesive film after crosslinking and irradiation curing is reduced, the grid adhesive film is ensured not to flow in the laminating process of the module, and the grid part, particularly the edge grid reflecting layer, after the photovoltaic module is laminated is not easy to crack.
Description
Technical Field
The invention belongs to the technical field of packaging adhesive films, and particularly relates to a high-gain grid adhesive film for a photovoltaic module, composite EVA resin and a production process of the composite EVA resin.
Background
High conversion efficiency and low manufacturing cost have been sought goals for photovoltaic power generation. At present, because gaps exist among the cells, light irradiated at the gaps cannot be fully absorbed and utilized by the cells, energy loss is caused, and the efficiency of the photovoltaic module is lower than that of the cells. The white high-reflection back plate can utilize light rays at partial gaps, the back layer adhesive film adopts a white adhesive film, the light rays at the partial gaps can be partially utilized, and the power gain is higher than that of the white back plate. The principle is that light rays at the gap are reflected to the front layer of glass, reflected or even totally reflected at the interface between the glass and the air and finally emitted to the front side of the cell.
In order to realize the utilization of light at the gap, the conventional technology at present relates to a grid adhesive film structure: namely, the glue film part corresponding to the cell area is set to be transparent, and a white high-reflection grid structure is set at the cell gap.
Therefore, the conventional grid adhesive film comprises a base adhesive film and a strip-shaped reflecting layer positioned on the surface of the base adhesive film, wherein the position of the strip-shaped reflecting layer corresponds to the gap of the battery piece. When the grid adhesive film is applied to assembly packaging, and when the grid adhesive film is laminated at high temperature, the substrate adhesive film flows through high-temperature melting, so that the strip-shaped reflecting layer on the surface of the substrate adhesive film is easy to fall off, or deform or shift positions, and the strip-shaped reflecting layer cannot correspond to the gaps of the battery pieces, so that the effect of reflecting light rays cannot be achieved, and the light rays which can be originally irradiated to the battery pieces can be reflected, and the conversion efficiency cannot be effectively increased.
Patent document CN202022009619U discloses a grid adhesive film and a photovoltaic module, which solve the problem that the reflective layer between two cells is easy to fall off, deform, or shift position by means of pre-crosslinking, and the problem that the reflective layer is easy to be damaged after the cells are laminated at the edge of the photovoltaic module is still not solved well.
Disclosure of Invention
The invention provides a high-gain grid adhesive film for a photovoltaic module, composite EVA resin and a production process thereof.
In order to solve the above technical problem, the present invention provides a high gain grid adhesive film for a photovoltaic module, comprising: the contact surface of the base film and the grid reflecting layer is an EVA (ethylene vinyl acetate) adhesive film; the melt index of the EVA adhesive film is 6-15 g/10 min.
In another aspect, the invention also provides a composite EVA resin for the grid adhesive film, wherein the melt index of the composite EVA resin is 6-15 g/10 min.
In a third aspect, the invention further provides a photovoltaic module, such as the above-mentioned high-gain grid adhesive film.
In a fourth aspect, the invention further provides a production process of the high-gain grid adhesive film for the photovoltaic module, which comprises the following steps: step S1, uniformly mixing the granules of the composite EVA resin and the auxiliary agent in a spraying mode to prepare master granules; and step S2, enabling the master batch to pass through a casting extruder, and then embossing to prepare the base material.
The high-gain grid adhesive film for the photovoltaic module has the beneficial effects that various EVA resins with different melt indexes are mixed according to the proportion, the processing speed regulation is ensured while the flowability of the EVA resins is reduced, so that the flowability of the adhesive film after crosslinking and irradiation curing is reduced, the grid adhesive film is ensured not to flow in the module laminating process, and the grid part, particularly the edge grid reflecting layer after the photovoltaic module is laminated is not easy to crack.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a pictorial view of a high gain grid adhesive film edge break for a prior art photovoltaic module;
FIG. 2 is a pictorial view of a preferred embodiment of the high gain grid adhesive film for photovoltaic modules of the present invention;
FIG. 3 is an edge partial view of a preferred embodiment of a high gain grid adhesive film for a photovoltaic module of the present invention;
fig. 4 is a flow chart of the high gain grid adhesive film for photovoltaic module of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the production process of the traditional photovoltaic module, when the cell sheet is laminated on the grid adhesive film under the environment of 145 ℃, the ink layer at the edge of the module is easy to crack. Although patent document CN202022009619U mentioned in the background art discloses a grid adhesive film and a photovoltaic module, which solve the problem that the reflective layer between two cells is easy to fall off, or deform, or shift position by pre-crosslinking, the pre-crosslinking part adopted in the patent document can only protect the grid gap between the cells, and the edge of the cell of the diaphragm can still be damaged during the lamination process of the module. Therefore, the problem that the reflecting layer of the edge of the photovoltaic module is easily damaged after the pressure-bearing cell piece still cannot be well solved.
The applicant passes the verification experiment and shows that at the pre-crosslinking degree of 30 percent and the maximum displacement of 2mm, a large number of cracks appear on the edge of the cell piece. Therefore, the technical solutions disclosed in the above patent documents do not solve the problem that the reflective layer at the edge of the adhesive film is easily damaged.
In conclusion, how to avoid the cracking of the ink layer at the edge of the module is a technical problem which needs to be solved urgently in the production process of the photovoltaic module, and is also a technical problem which puzzles adhesive film manufacturers.
As shown in fig. 2, the high-gain grid adhesive film for a photovoltaic module of the present invention comprises a base film, wherein an EVA adhesive film is disposed on a contact surface of the base film and a grid reflective layer; the melt index of the EVA adhesive film is 6-15 g/10 min.
The base film is an EVA single-layer casting adhesive film, which is called as an EVA adhesive film for short; the base film may also be an EPE coextruded film. For the EPE co-extrusion adhesive film, E is an EVA adhesive film, and P is a POE adhesive film.
In this embodiment, specifically, the EVA adhesive film includes the following components in parts by mass: 100 parts of composite EVA resin; 0.1-1 part of initiator; 0.1-1 part of auxiliary crosslinking agent; 0.1-1 part of adhesion promoter; 0.1-1 part of light stabilizer.
The EVA resin can flow to cause the ink layer to crack; if the grid adhesive film flows during the lamination process of the assembly, grid lines can be damaged, or position movement and distortion can affect the appearance and the power generation efficiency of the assembly.
In this embodiment, specifically, the composite EVA resin is one or more of EVA resins with a melt index of 25g/10min, 20g/10min, 15g/10min, 10g/10min, and 6g/10min, where the EVA resin has a vinyl acetate VA content of 28%.
In this embodiment, the initiator is specifically an organic peroxide, and includes one or two of benzoyl peroxide, lauroyl peroxide, di-tert-butyl peroxide, dicumyl peroxide, tert-butyl peroxybenzoate, tert-butyl peroxypivalate, tert-butyl peroxy-2-ethylhexylcarbonate, diisopropyl peroxydicarbonate, dicyclohexyl peroxydicarbonate, cumene hydroperoxide, and tert-butyl hydroperoxide.
In this embodiment, specifically, the co-crosslinking agent includes one or two of divinylbenzene, diisocyanate, methylenebisacrylamide, triallylisocyanurate, trimethylolpropane triethylacrylate, trimethylolpropane trimethacrylate, and acrylamide.
In this embodiment, the adhesion promoter specifically includes one or two of vinyltriethoxysilane, vinyltrimethoxysilane, vinyltris (β -methoxyethoxysilane, vinyltributylsilane, butadienyltriethoxysilane, isobutyltriethoxysilane, γ - (2, 3-glycidoxy) propyltrimethoxysilane, γ - (methacryloyloxy) propyltrimethoxysilane, γ - (2, 3-glycidoxy) propyltrimethoxysilane, 2- (3, 4-epoxycyclohexyl) ethyltrimethoxysilane, γ -aminopropyltriethoxysilane, N- β aminoethyl- γ -aminopropylmethoxysilane, tetraisopropylbis (dioctylphosphato) titanate.
In this embodiment, the light stabilizer specifically includes one or two of bis-2, 2, 6, 6-tetramethylpiperidinol sebacate, bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, and the like, and the types are 770, 944, 2020, 508, 622, 783, 791, 292, LA402, V703, and the like.
The invention also provides the composite EVA resin for the grid adhesive film, and the melt index of the composite EVA resin is 6-15 g/10 min.
In this embodiment, specifically, the composite EVA resin is one or more of EVA resins with a melt index of 25g/10min, 20g/10min, 15g/10min, 10g/10min, and 6g/10min, where the EVA resin has a vinyl acetate VA content of 28%.
The invention also provides a photovoltaic module which adopts the high-gain grid adhesive film.
The invention also provides a production process of the high-gain grid adhesive film for the photovoltaic module, which comprises the following steps: step S1, uniformly mixing the granules of the composite EVA resin and the auxiliary agent in a spraying mode to prepare master granules; and step S2, enabling the master batch to pass through a casting extruder, and then embossing to obtain the base film.
In this embodiment, specifically, the casting adhesive film includes a single-layer casting adhesive film and an ABA three-layer co-extrusion casting adhesive film, where the ABA three-layer co-extrusion casting adhesive film is formed, the layer a (surface layer) is made of composite EVA resin, and the layer B (core layer) is made of POE resin and an auxiliary agent similar to the EVA resin, including an initiator, an auxiliary crosslinking agent, an adhesion promoter, and a light stabilizer, and the amounts of the initiator, the auxiliary crosslinking agent, the adhesion promoter, and the light stabilizer are 0.1-1% respectively.
In this embodiment, specifically, the passing of the master batch through the casting extruder in the step S2 includes: the mother granules are extruded by a casting extruder and then heated to 140 ℃ by the assistance of thermal infrared, and are rapidly cooled and rolled by a cooling roller at 20-30 ℃ so that the thermal shrinkage rate of the base film is not more than 2 percent. The thermal shrinkage of the base film is controlled to be less than 2 percent (the testing condition is 120 ℃/5min) through rapid cooling, so that the packaging yield of the component after EB (Electron beam) irradiation of the printing grid film is ensured.
The present invention will now be described in further detail with reference to examples.
Example 1
Step S1, uniformly mixing 100 parts of EVA resin melt finger 15 granules, 0.5 part of initiator, 0.5 part of auxiliary crosslinking agent, 0.3 part of adhesion promoter and 0.3 part of light stabilizer in a spraying manner to prepare master granules;
and step S2, enabling the master batch to pass through a casting extruder, and then embossing to obtain the base film.
In the embodiment, the initiator, the auxiliary crosslinking agent, the adhesion promoter and the light stabilizer play an important role in the links of crosslinking curing and irradiation curing, so that the fluidity of the grid adhesive film is reduced after the grid adhesive film is attached, and the grid adhesive film is ensured not to flow in the laminating process of the component.
Examples 2-11 are essentially the same as example 1 except for the specific parts of the components, as detailed in tables 1 and 2.
Table 1:
table 2:
the results of the above tests are shown in table 3 below:
compared with the comparative examples 1-11, on the premise of ensuring that the melt index of the composite EVA resin is 6-15 and the content of vinyl acetate VA is 28%, the examples 3, 8 and 11 have the best performance, stable size and small shrinkage, and the example 11 also has the advantages of processing characteristics and moderate flowability. When the grid reflecting layer EB is cured, the pre-crosslinked base film is synchronously irradiated, so that the adhesive force of an ink layer can be improved, the flowability of the base film during component lamination can be further inhibited, and the grid reflecting layer is prevented from being damaged.
In summary, the high-gain grid adhesive film for the photovoltaic module, the composite EVA resin and the production process thereof provided by the invention mix various EVA resins with different melt indexes in proportion, so that the processing speed regulation is ensured while the flowability of the EVA resin is reduced, the flowability of the adhesive film after crosslinking and irradiation curing is reduced, the grid adhesive film is ensured not to flow in the module laminating process, and the grid part, especially the edge grid reflecting layer after the photovoltaic module is laminated is not easy to crack.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. The utility model provides a photovoltaic module is with high gain net glued membrane which characterized in that includes:
the contact surface of the base film and the grid reflecting layer is an EVA (ethylene vinyl acetate) adhesive film; wherein
The melt index of the EVA adhesive film is 6-15 g/10 min.
2. The high gain grid adhesive film according to claim 1,
the base film is an EVA single-layer tape casting adhesive film or an EPE co-extrusion adhesive film; and is
The melt index of the EVA adhesive film is 6-8 g/10 min.
3. The high gain grid adhesive film according to claim 1,
the EVA adhesive film comprises the following components in parts by mass:
100 parts of composite EVA resin;
0.1-1 part of initiator;
0.1-1 part of auxiliary crosslinking agent;
0.1-1 part of adhesion promoter;
0.1-1 part of light stabilizer;
the composite EVA resin is one or more of EVA resins with the melt index of 25g/10min, 20g/10min, 15g/10min, 10g/10min and 6g/10 min;
wherein the EVA resin has a Vinyl Acetate (VA) content of 28%.
4. The high gain grid adhesive film according to claim 3,
the initiator is selected from one or two of organic peroxides, including benzoyl peroxide, lauroyl peroxide, di-tert-butyl peroxide, dicumyl peroxide, tert-butyl peroxybenzoate, tert-butyl peroxypivalate, tert-butyl peroxy-2-ethylhexyl carbonate, diisopropyl peroxydicarbonate, dicyclohexyl peroxydicarbonate, cumene hydroperoxide and tert-butyl hydroperoxide;
the auxiliary crosslinking agent is one or two of divinylbenzene, diisocyanate, methylene bisacrylamide, triallyl isocyanurate, trimethylolpropane triethyl acrylate, trimethylolpropane trimethacrylate and acrylamide;
the adhesion promoter is one or two of vinyltriethoxysilane, vinyltrimethoxysilane, vinyltris (beta-methoxyethoxysilane, vinyltri-t-butylhydroperoxide), butadienyltriethoxysilane, isobutyltriethoxysilane, gamma- (2, 3-epoxypropoxy) propyltrimethoxysilane, gamma- (methacryloyloxy) propyltrimethoxysilane, gamma- (2, 3-epoxypropoxy) propyltrimethoxysilane, 2- (3, 4-epoxycyclohexyl) ethyltrimethoxysilane, gamma-aminopropyltriethoxysilane, N-beta aminoethyl-gamma-aminopropylmethoxysilane and tetraisopropylbis (dioctylphosphite acyloxy) titanate.
5. The high gain grid adhesive film according to claim 4,
the light stabilizer is one or two of hindered amine light stabilizers such as bis-2, 2, 6, 6-tetramethylpiperidinol sebacate, bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate and the like in the types of 770, 944, 2020, 508, 622, 783, 791, 292, LA402, V703 and the like.
6. A composite EVA resin for grid adhesive film is characterized in that,
the melt index of the composite EVA resin is 6-15 g/10 min.
7. The composite EVA resin of claim 6,
the composite EVA resin is one or more of EVA resins with the melt index of 25g/10min, 20g/10min, 15g/10min, 10g/10min and 6g/10 min;
wherein the EVA resin has a Vinyl Acetate (VA) content of 28%.
8. A photovoltaic module characterized by the high gain grid adhesive film of claim 1.
9. The production process of the high-gain grid adhesive film is characterized by comprising the following steps of:
step S1, uniformly mixing the granules of the composite EVA resin and the auxiliary agent in a spraying mode to prepare master granules;
and step S2, enabling the master batch to pass through a casting extruder, and then embossing to obtain the base film.
10. The latticed adhesive film production process of claim 9,
said step S2 passing the master batch through a casting extruder comprises:
the mother granules are extruded by a casting extruder and then heated to 140 ℃ by the assistance of thermal infrared, and are rapidly cooled and rolled by a cooling roller at 20-30 ℃ so that the thermal shrinkage rate of the base film is not more than 2 percent.
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| CN202111664549.7A CN114231210A (en) | 2021-12-31 | 2021-12-31 | High-gain grid adhesive film for photovoltaic module, composite EVA resin and production process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114806459A (en) * | 2022-06-01 | 2022-07-29 | 云阳金田塑业有限公司 | Modified EVA hot melt adhesive suitable for adhesive-free film and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107556931A (en) * | 2017-09-04 | 2018-01-09 | 常州斯威克光伏新材料有限公司 | Eutectic refers to the compound white photovoltaic glued membranes of EVA |
| US20200028011A1 (en) * | 2017-03-03 | 2020-01-23 | Hangzhou First Applied Material Co., Ltd. | Highly reflective gain type photovoltaic packaging adhesive film and usage |
| CN110776842A (en) * | 2018-07-12 | 2020-02-11 | 杭州福斯特应用材料股份有限公司 | Packaging adhesive film with high local light reflection and application |
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2021
- 2021-12-31 CN CN202111664549.7A patent/CN114231210A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200028011A1 (en) * | 2017-03-03 | 2020-01-23 | Hangzhou First Applied Material Co., Ltd. | Highly reflective gain type photovoltaic packaging adhesive film and usage |
| CN107556931A (en) * | 2017-09-04 | 2018-01-09 | 常州斯威克光伏新材料有限公司 | Eutectic refers to the compound white photovoltaic glued membranes of EVA |
| CN110776842A (en) * | 2018-07-12 | 2020-02-11 | 杭州福斯特应用材料股份有限公司 | Packaging adhesive film with high local light reflection and application |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114806459A (en) * | 2022-06-01 | 2022-07-29 | 云阳金田塑业有限公司 | Modified EVA hot melt adhesive suitable for adhesive-free film and preparation method thereof |
| CN114806459B (en) * | 2022-06-01 | 2023-09-01 | 云阳金田塑业有限公司 | Modified EVA hot melt adhesive suitable for glue-free film and preparation method thereof |
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