CN115725244B - Packaging adhesive film and photovoltaic module - Google Patents
Packaging adhesive film and photovoltaic module Download PDFInfo
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- CN115725244B CN115725244B CN202211084618.1A CN202211084618A CN115725244B CN 115725244 B CN115725244 B CN 115725244B CN 202211084618 A CN202211084618 A CN 202211084618A CN 115725244 B CN115725244 B CN 115725244B
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- Prior art keywords
- adhesive film
- packaging
- thickness
- film
- central area
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- 239000002313 adhesive film Substances 0.000 title claims abstract description 347
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 98
- 238000005538 encapsulation Methods 0.000 claims abstract description 11
- 229920006280 packaging film Polymers 0.000 claims description 51
- 239000012785 packaging film Substances 0.000 claims description 51
- 229920005989 resin Polymers 0.000 claims description 40
- 239000011347 resin Substances 0.000 claims description 40
- 239000003431 cross linking reagent Substances 0.000 claims description 38
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 30
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 30
- 230000003712 anti-aging effect Effects 0.000 claims description 17
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- 229920001577 copolymer Polymers 0.000 claims description 12
- 239000004711 α-olefin Substances 0.000 claims description 11
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 9
- -1 pentaerythritol tetramethyl tetraacrylate Chemical compound 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 229920006213 ethylene-alphaolefin copolymer Polymers 0.000 claims description 7
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 claims description 6
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 claims description 6
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 claims description 6
- XFCMNSHQOZQILR-UHFFFAOYSA-N 2-[2-(2-methylprop-2-enoyloxy)ethoxy]ethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCOCCOC(=O)C(C)=C XFCMNSHQOZQILR-UHFFFAOYSA-N 0.000 claims description 6
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 claims description 6
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 6
- 239000003963 antioxidant agent Substances 0.000 claims description 6
- 230000003078 antioxidant effect Effects 0.000 claims description 6
- 229920000578 graft copolymer Polymers 0.000 claims description 6
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical compound CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 4
- 239000006096 absorbing agent Substances 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- 230000007062 hydrolysis Effects 0.000 claims description 4
- 238000006460 hydrolysis reaction Methods 0.000 claims description 4
- 239000003112 inhibitor Substances 0.000 claims description 4
- 239000004611 light stabiliser Substances 0.000 claims description 4
- 229910021645 metal ion Inorganic materials 0.000 claims description 4
- 239000002516 radical scavenger Substances 0.000 claims description 4
- 229910000077 silane Inorganic materials 0.000 claims description 4
- 229940124543 ultraviolet light absorber Drugs 0.000 claims description 4
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims description 4
- RIPYNJLMMFGZSX-UHFFFAOYSA-N (5-benzoylperoxy-2,5-dimethylhexan-2-yl) benzenecarboperoxoate Chemical compound C=1C=CC=CC=1C(=O)OOC(C)(C)CCC(C)(C)OOC(=O)C1=CC=CC=C1 RIPYNJLMMFGZSX-UHFFFAOYSA-N 0.000 claims description 3
- 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 3
- VMAWODUEPLAHOE-UHFFFAOYSA-N 2,4,6,8-tetrakis(ethenyl)-2,4,6,8-tetramethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane Chemical compound C=C[Si]1(C)O[Si](C)(C=C)O[Si](C)(C=C)O[Si](C)(C=C)O1 VMAWODUEPLAHOE-UHFFFAOYSA-N 0.000 claims description 3
- BJELTSYBAHKXRW-UHFFFAOYSA-N 2,4,6-triallyloxy-1,3,5-triazine Chemical compound C=CCOC1=NC(OCC=C)=NC(OCC=C)=N1 BJELTSYBAHKXRW-UHFFFAOYSA-N 0.000 claims description 3
- VLQZJOLYNOGECD-UHFFFAOYSA-N 2,4,6-trimethyl-1,3,5,2,4,6-trioxatrisilinane Chemical compound C[SiH]1O[SiH](C)O[SiH](C)O1 VLQZJOLYNOGECD-UHFFFAOYSA-N 0.000 claims description 3
- YKTNISGZEGZHIS-UHFFFAOYSA-N 2-$l^{1}-oxidanyloxy-2-methylpropane Chemical group CC(C)(C)O[O] YKTNISGZEGZHIS-UHFFFAOYSA-N 0.000 claims description 3
- 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 3
- GXBCWRMJQPLZDU-UHFFFAOYSA-N 2-methyl-2-propan-2-ylperoxypropane Chemical compound CC(C)OOC(C)(C)C GXBCWRMJQPLZDU-UHFFFAOYSA-N 0.000 claims description 3
- 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 3
- 239000004698 Polyethylene Substances 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
- HVVWZTWDBSEWIH-UHFFFAOYSA-N [2-(hydroxymethyl)-3-prop-2-enoyloxy-2-(prop-2-enoyloxymethyl)propyl] prop-2-enoate Chemical compound C=CC(=O)OCC(CO)(COC(=O)C=C)COC(=O)C=C HVVWZTWDBSEWIH-UHFFFAOYSA-N 0.000 claims description 3
- NOZAQBYNLKNDRT-UHFFFAOYSA-N [diacetyloxy(ethenyl)silyl] acetate Chemical compound CC(=O)O[Si](OC(C)=O)(OC(C)=O)C=C NOZAQBYNLKNDRT-UHFFFAOYSA-N 0.000 claims description 3
- MASNVFNHVJIXLL-UHFFFAOYSA-N ethenyl(ethoxy)silicon Chemical compound CCO[Si]C=C MASNVFNHVJIXLL-UHFFFAOYSA-N 0.000 claims description 3
- WOXXJEVNDJOOLV-UHFFFAOYSA-N ethenyl-tris(2-methoxyethoxy)silane Chemical compound COCCO[Si](OCCOC)(OCCOC)C=C WOXXJEVNDJOOLV-UHFFFAOYSA-N 0.000 claims description 3
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 3
- ARYZCSRUUPFYMY-UHFFFAOYSA-N methoxysilane Chemical compound CO[SiH3] ARYZCSRUUPFYMY-UHFFFAOYSA-N 0.000 claims description 3
- TVMXDCGIABBOFY-UHFFFAOYSA-N n-Octanol Natural products CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 claims description 3
- 229920003192 poly(bis maleimide) Polymers 0.000 claims description 3
- 229920002589 poly(vinylethylene) polymer Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 3
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 3
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 claims 1
- 230000032798 delamination Effects 0.000 abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 15
- 239000012528 membrane Substances 0.000 abstract description 9
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 230000000903 blocking effect Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 40
- 229920006124 polyolefin elastomer Polymers 0.000 description 27
- 238000000034 method Methods 0.000 description 25
- 238000004132 cross linking Methods 0.000 description 20
- 238000003475 lamination Methods 0.000 description 20
- 230000008569 process Effects 0.000 description 20
- 238000004519 manufacturing process Methods 0.000 description 19
- 239000012752 auxiliary agent Substances 0.000 description 16
- 239000000853 adhesive Substances 0.000 description 14
- 230000001070 adhesive effect Effects 0.000 description 14
- 230000005012 migration Effects 0.000 description 12
- 238000013508 migration Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 10
- 238000007731 hot pressing Methods 0.000 description 10
- 239000002994 raw material Substances 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 8
- 230000007547 defect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000001125 extrusion Methods 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 6
- 150000003384 small molecules Chemical class 0.000 description 6
- 230000032683 aging Effects 0.000 description 5
- 238000005336 cracking Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- 230000002411 adverse Effects 0.000 description 4
- 230000002238 attenuated effect Effects 0.000 description 4
- 229920000098 polyolefin Polymers 0.000 description 4
- 238000002834 transmittance Methods 0.000 description 4
- 241000237858 Gastropoda Species 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- MTEZSDOQASFMDI-UHFFFAOYSA-N 1-trimethoxysilylpropan-1-ol Chemical compound CCC(O)[Si](OC)(OC)OC MTEZSDOQASFMDI-UHFFFAOYSA-N 0.000 description 2
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 239000007822 coupling agent Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000004383 yellowing Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 238000004804 winding 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
Abstract
The invention discloses a packaging adhesive film and a photovoltaic module, which comprise: the edge areas are respectively positioned at two sides of the central area along the first direction, and the thickness of the edge areas is larger than that of the central area; the packaging adhesive film comprises a first adhesive film and a second adhesive film, and the surface of the first adhesive film, which is close to one side of the battery piece, and the surface of the first adhesive film, which is far away from one side of the battery piece, are provided with the second adhesive film; the thickness ratio of the first adhesive film to the second adhesive film in the central area is different from the thickness ratio of the first adhesive film to the second adhesive film in the edge area; the thickness of the first adhesive film in the edge area is larger than that of the first adhesive film in the central area, and the thickness of the second adhesive film in the edge area is smaller than that of the second adhesive film in the central area. Through the encapsulation glued membrane that sets up first glued membrane and second glued membrane formation, when having advantages such as anti PID, high water blocking, antiskid, improve weatherability, reduced the hidden risk of splitting of marginal battery piece and photovoltaic module edge delamination's risk simultaneously.
Description
Technical Field
The invention relates to the field of photovoltaic modules, in particular to a packaging adhesive film and a photovoltaic module.
Background
Along with the continuous development of technology, the global resource consumption is serious, the energy war becomes the focus of all countries worldwide, solar energy is increasingly focused internationally as a renewable energy source, and the photovoltaic industry technology is also changed day by day. The photovoltaic packaging adhesive film is taken as an indispensable part in the photovoltaic module, plays a main protection function in the module, and provides a solid rear shield for the normal operation of the photovoltaic module. There are three main types of photovoltaic films on the market at present, namely EVA (polyethylene-polyvinyl acetate copolymer) films, POE (polyolefin elastomer) films and co-extrusion films. The co-extrusion adhesive film is commonly formed by co-extrusion of two layers of EVA/POE or three layers of EVA+POE+EVA, so that the problem of overlarge PID (potential induced) attenuation of the EVA adhesive film can be solved, the problem of easy deviation of the POE adhesive film can be solved, and the co-extrusion adhesive film has the advantages of high water resistance, skid resistance and cost reduction.
However, in the existing co-extrusion adhesive film, the auxiliary agent is easy to migrate from the POE layer to the EVA layer, so that the ageing resistance of the assembly is influenced; meanwhile, in the lamination heating process, bubbles, edge gaps, even delamination and the like are easy to occur at the edge part of the component, and the encapsulation effect is affected.
Therefore, it is desirable to provide a packaging film and a photovoltaic module that can avoid the migration of additives and the poor lamination process of the module edges.
Disclosure of Invention
In view of the above, the present invention provides a packaging adhesive film, which includes a central area and edge areas disposed at sides of the central area, wherein the edge areas are respectively located at two sides of the central area along a first direction, and thickness of the edge areas is greater than that of the central area; the packaging adhesive film comprises a first adhesive film and a second adhesive film, and the surface of the first adhesive film, which is close to one side of the battery piece, and the surface of the first adhesive film, which is far away from one side of the battery piece, are provided with the second adhesive film; the thickness ratio of the first adhesive film to the second adhesive film in the central area is different from the thickness ratio of the first adhesive film to the second adhesive film in the edge area; the thickness of the first adhesive film in the edge area is larger than that of the first adhesive film in the central area, and the thickness of the second adhesive film in the edge area is smaller than that of the second adhesive film in the central area.
Preferably, in the central area, the thickness ratio of the first adhesive film to the second adhesive film is 1:5-3:1; in the edge area, the thickness ratio of the first adhesive film to the second adhesive film is 6:1-1:0.
Preferably, the thickness of the edge region is 73 μm to 195 μm larger than the thickness of the central region, the thickness of the central region is 211 μm to 612 μm, and the thickness of the edge region is 284 μm to 807 μm.
Preferably, the first adhesive film is a POE adhesive film, and the second adhesive film is an EVA adhesive film.
Preferably, in the central region, the thickness of the first adhesive film is 37-469 μm, and the thickness of the second adhesive film is 52-477 μm; in the edge area, the thickness of the first adhesive film is 284-682 μm, and the thickness of the second adhesive film is less than or equal to 125 μm.
Preferably, the EVA adhesive film comprises the following components in parts by mass: 100 parts of ethylene-vinyl acetate copolymer resin, 0.1 to 1.0 part of cross-linking agent, 0.1 to 1.0 part of auxiliary cross-linking agent, 0.2 to 2.0 parts of silane coupling agent and 0.1 to 1.0 part of anti-aging agent; the POE adhesive film comprises the following components in parts by mass: 100 parts of ethylene-alpha olefin copolymer resin, 10-50 parts of polar reinforced resin, 2-10 parts of creep-resistant reinforced resin, 0.3-1.0 part of cross-linking agent, 0.2-2.0 parts of auxiliary cross-linking agent, 0.2-2.0 parts of silane coupling agent and 0.1-1.0 parts of anti-aging agent.
Preferably, the ethylene-vinyl acetate copolymer resin has a vinyl acetate content of 25% to 33%; the alpha olefin in the ethylene-alpha olefin copolymer resin comprises at least one of propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene and 1-octene; the cross-linking agent comprises at least one of 1, 1-di (tert-butyl peroxy) -3, 5-trimethylcyclohexane, 2, 5-dimethylhexane-2, 5-di-tert-butyl peroxide, 2, 5-dimethyl-2, 5-bis (benzoyl peroxy) -hexane, dicumyl peroxide and bis (tert-butyl isopropyl peroxide) benzene; the auxiliary cross-linking agent comprises at least one of diethylene glycol dimethacrylate, N' -m-phenyl bismaleimide, 1,3, 5-triallyl-s-triazine-2, 4, 6-trione, triallyl isocyanurate, triallyl cyanurate, trimethylolpropane trimethacrylate, trivinyl trimethyl cyclotrisiloxane, 1, 2-polybutadiene, pentaerythritol triacrylate, pentaerythritol tetramethyl tetraacrylate and tetravinyl tetramethyl cyclotetrasiloxane; the coupling agent comprises at least one of gamma-chloropropyl methoxysilane, vinyl ethoxysilane, vinyl tri (beta-methoxyethoxy) silane, gamma-methacryloxypropyl trimethoxysilane, vinyl triacetoxy silane, gamma-glycidol ether oxypropyl trimethoxysilane and the like; the anti-aging agent comprises at least one of ultraviolet light absorber, light stabilizer, antioxidant, hydrolysis inhibitor, acid absorber and metal ion scavenger.
Preferably, the polar reinforcing resin comprises at least one of ethylene-alpha olefin maleic anhydride graft copolymer and ethylene-alpha olefin silane graft copolymer, and the grafting rate is 0.5-3.0%; the creep-resistant reinforced resin comprises at least one of polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-butene copolymer, ethylene-pentene copolymer, ethylene-octene copolymer or ethylene-hexene copolymer, and the melting point is 90-130 ℃.
Preferably, the edge area has a width in the first direction of 10mm to 200mm.
The invention also provides a photovoltaic module, which comprises a front packaging layer, a first packaging adhesive film, a battery piece layer, a second packaging adhesive film and a back packaging layer which are sequentially arranged, wherein at least one of the first packaging adhesive film and the second packaging adhesive film is the packaging adhesive film.
Compared with the prior art, the packaging adhesive film and the photovoltaic module provided by the invention have the beneficial effects that at least the following are realized:
according to the packaging adhesive film and the photovoltaic module, the packaging adhesive film is formed by arranging the first adhesive film and the second adhesive film, so that the corrosion of water vapor to the packaging adhesive film is avoided, and the water vapor resistance of the photovoltaic module is improved. Through setting up the thickness in marginal district and being greater than the thickness in central district, compensated the thickness of the glued membrane loss in hot pressing in-process marginal district, avoided the laminating encapsulation glued membrane overflow to lead to lacks the gum etc. unusual to prevent that delamination phenomenon from appearing at the subassembly edge, can effectively promote the anti PID performance of glued membrane simultaneously, promote photovoltaic module photoelectric conversion efficiency. In addition, the thickness ratio of the first adhesive film to the second adhesive film in the central area is set to be thinner than the thickness ratio of the first adhesive film to the second adhesive film in the edge area, the middle of the first adhesive film is combined to be thicker than the middle of the second adhesive film, the thickness of the first adhesive film in the edge area is thickened to ensure that the content of the first adhesive film in the edge area is higher than the content of the first adhesive film in the central area, the packaging adhesive film has the advantages of PID resistance, high water resistance, skid resistance and the like, the weather resistance is improved, the hidden cracking risk of an edge battery piece and the edge delamination risk of a photovoltaic module are reduced, the content of the second adhesive film in the edge area is lower than the content of the second adhesive film in the central area by thinning the thickness of the second adhesive film in the edge area, the crosslinking degree of the packaging adhesive film can be controlled to avoid migration of auxiliaries, the comprehensive performances such as viscosity performance, mechanical performance and creep resistance are improved, the cost is low, the process is simple, and the industrialized popularization is facilitated.
Of course, it is not necessary for any one product embodying the invention to achieve all of the technical effects described above at the same time.
Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural diagram of a packaging adhesive film with a three-layer structure provided by the invention;
FIG. 2 is a schematic view of the thickness of a three-layer packaging film shown in FIG. 1;
fig. 3 is a schematic structural diagram of a packaging adhesive film with a double-layer structure provided by the invention;
FIG. 4 is a schematic thickness structure of a two-layer packaging film shown in FIG. 3;
fig. 5 is a schematic structural diagram of another two-layer packaging film according to the present invention;
FIG. 6 is a schematic thickness structure of another two-layer packaging film shown in FIG. 5;
fig. 7 is a schematic plan view of a packaging film applied to a photovoltaic module according to the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
The auxiliary agent in the existing co-extrusion adhesive film is easy to migrate from the POE layer to the EVA layer, so that the ageing resistance of the assembly is influenced, and meanwhile, in the lamination heating process, the edge part of the assembly is easy to generate phenomena such as bubbles, edge gaps, even delamination and the like, so that the encapsulation effect is influenced.
Based on the research, the packaging adhesive film and the photovoltaic module provided by the application have the advantages of PID resistance, high water resistance, skid resistance and the like, meanwhile, the defects of adhesive shortage and the like caused by overflow of the laminated packaging adhesive film are avoided, the generation of bubbles at the edge of the photovoltaic module is reduced, the hidden cracking risk of the edge battery piece and the delamination risk at the edge of the photovoltaic module are reduced, the weather resistance is improved, the crosslinking degree of the packaging adhesive film is controlled, the migration of additives is avoided, and the comprehensive performances such as viscosity performance, mechanical performance and creep resistance are improved, so that the photoelectric conversion efficiency of the photovoltaic module is improved. The application provides a packaging adhesive film and a photovoltaic module with the technical effects, which are described in detail below.
Fig. 1 is a schematic structural view of a packaging film with a three-layer structure provided by the present application, fig. 2 is a schematic structural view of a thickness of the packaging film with a three-layer structure provided by fig. 1, please refer to fig. 1 to 2, the present application provides a packaging film 000, the packaging film 000 includes a central area 1, and edge areas 2 disposed at sides of the central area 1, the edge areas 2 are respectively located at two sides of the central area 1 along a first direction X, and a thickness h1 of the edge areas 2 is greater than a thickness h2 of the central area 1; the packaging adhesive film 000 comprises a first adhesive film 3 and a second adhesive film 4, wherein the surface of the first adhesive film 3 on one side close to the battery piece 5 and the surface of the first adhesive film on one side far from the battery piece 5 are provided with the second adhesive film 4; the thickness ratio of the first adhesive film 3 to the second adhesive film 4 in the central area 1 is different from the thickness ratio of the first adhesive film 3 to the second adhesive film 4 in the edge area 2; the thickness h3 of the first adhesive film 3 in the edge area 2 is larger than the thickness h4 of the first adhesive film 3 in the central area 1, and the thickness h5 of the second adhesive film 4 in the edge area 2 is smaller than the thickness h6 of the second adhesive film 4 in the central area 1.
It will be appreciated that the encapsulating film 000 is composed of a central region 1 and edge regions 2, the edge regions 2 being located on either side of the central region 1 in the first direction X. And the packaging adhesive film 000 is formed by compounding the first adhesive film 3 and the second adhesive film 4, sequentially comprises the second adhesive film 4, the first adhesive film 3 and the second adhesive film 4, and forms the packaging adhesive film 000 with the second adhesive film 4 through arranging the first adhesive film 3, so that the corrosion of water vapor to the packaging adhesive film 000 is avoided, and the water vapor resistance and the stability of the assembly are improved. The thickness h1 of the edge area 2 is larger than the thickness h2 of the central area 1, a structure with thin middle and thick edge of the packaging adhesive film 000 is formed, the thickness of the adhesive film loss of the edge area 2 in the hot pressing process is compensated, the defects of adhesive shortage and the like caused by overflow of the laminated packaging adhesive film 000 are avoided, delamination phenomenon among layers of the adhesive film is prevented, the buffering performance of the assembly is improved, the generation of bubbles at the edge of the assembly is reduced, the risk of delamination at the edge of the assembly is reduced, and the photoelectric conversion efficiency of the assembly is improved. The thickness ratio of the first adhesive film 3 and the second adhesive film 4 in the central area 1 is set to be thinner than the thickness ratio of the first adhesive film 3 and the second adhesive film 4 in the edge area 2, the middle of the first adhesive film 3 is combined to be thinner, the edge is thicker than the middle of the second adhesive film 4, the thickness h3 of the first adhesive film 3 in the edge area 2 is thickened, the content of the first adhesive film 3 in the edge area 2 is higher than the content of the first adhesive film 3 in the central area 1, the packaging adhesive film 000 has the advantages of PID resistance, high water resistance, skid resistance and the like, the weather resistance is improved, the risk of delamination of the edges of the assembly is reduced, the content of the second adhesive film 4 in the edge area 2 is lower than the content of the second adhesive film 4 in the central area 1 through thinning the thickness h5 of the second adhesive film 4, the crosslinking degree of the packaging adhesive film 000 can be controlled, the auxiliary agent migration is avoided, and the viscosity performance, the mechanical performance, the creep resistance and other comprehensive performances are improved.
Note that, fig. 1 does not show the thickness h of the packaging film 000, fig. 2 shows the thickness h of the packaging film 000 on the basis of fig. 1, and fig. 1 has the same structure as the packaging film 000 of fig. 2. In fig. 1 and fig. 2, only the packaging film 000 includes the second film 4, the first film 3 and the second film 4 in sequence, in some other embodiments of the present invention, the packaging film 000 may also have a two-layer film structure, when the packaging film 000 includes a two-layer film structure, the first film 3 may be provided with the second film 4 on a side close to the battery 5, and the first film 3 may be provided with the second film 4 on a side far from the battery 5, so that no matter what structure is adopted, it is only required that the packaging film 000 includes the first film 3 and the second film 4; in addition, the thickness in the present invention refers to the thickness of the film layer per unit area.
Optionally, fig. 3 is a schematic structural diagram of a packaging adhesive film with a double-layer structure provided by the present invention, fig. 4 is a schematic structural diagram of a thickness of the packaging adhesive film with a double-layer structure provided by fig. 3, fig. 5 is a schematic structural diagram of a packaging adhesive film with another double-layer structure provided by the present invention, fig. 6 is a schematic structural diagram of a thickness of the packaging adhesive film with another double-layer structure provided by fig. 5, please refer to fig. 1 to 6, and in a central area 1, a thickness ratio of the first adhesive film 3 to the second adhesive film 4 is 1:5-3:1; in the edge area 2, the thickness ratio of the first adhesive film 3 to the second adhesive film 4 is 6:1-1:0.
It can be understood that the thickness ratio of the first adhesive film 3 to the second adhesive film 4 in the central area 1 and the thickness ratio of the first adhesive film 3 to the second adhesive film 4 in the edge area 2 are set to be different to form the packaging adhesive film 000 with different thickness structures, for example, in the central area 1, the thickness ratio of the first adhesive film 3 to the second adhesive film 4 can be 1:4, 2:1; in the edge region 2, the thickness ratio of the first adhesive film 3 to the second adhesive film 4 may be 5:1, 4:1. And through limiting the thickness of the first adhesive film 3 and the second adhesive film 4 to be thinner than the middle of the first adhesive film 3, the edge is thicker than the middle of the second adhesive film 4, and the edge is thinner, the thickness h3 of the first adhesive film 3 in the edge area 2 is thickened, so that the content of the first adhesive film 3 in the edge area 2 is higher than the content of the first adhesive film 3 in the central area 1, the packaging adhesive film 000 has the advantages of PID resistance, high water resistance, skid resistance and the like, meanwhile, weather resistance is improved, the risk of delamination at the edge of the assembly is reduced, the content of the second adhesive film 4 in the edge area 2 is lower than the content of the second adhesive film 4 in the central area 1 through thinning the thickness h5 of the second adhesive film 4 in the edge area 2, the crosslinking degree of the packaging adhesive film 000 can be controlled, the migration of auxiliary agents can be avoided, and the comprehensive performances of viscosity performance, mechanical performance, creep resistance and the like are improved. However, if the thickness ratio of the first adhesive film 3 to the second adhesive film 4 in the central area 1 is less than 1:5, the first adhesive film 3 is too thin, the battery piece 5 is easily broken or hidden to crack, the power of the assembly is attenuated, the adhesive force between the assembly structures is reduced, and appearance defects caused by delamination easily occur after the assembly ages; if the thickness ratio of the first adhesive film 3 to the second adhesive film 4 is greater than 3:1, the first adhesive film 3 is too thick, adhesive overflows easily, and the manufacturing cost of the assembly is increased. However, if the thickness ratio of the first adhesive film 3 to the second adhesive film 4 in the edge area 2 is less than 6:1, the second adhesive film 4 is too thin, so that the thickness of the adhesive film loss in the edge area 2 is difficult to compensate in the hot pressing process, and the problems of bubbles, delamination and the like of the assembly are easy to occur; if the thickness ratio of the first adhesive film 3 to the second adhesive film 4 is greater than 1:0, the first adhesive film 3 is too thick, and although the problem of thinner edge of the component can be solved to a certain extent, the too large thickness makes lamination difficult, so that the labor cost is increased, the operation is complicated, the productivity is affected, the adhesive overflows easily, and the manufacturing cost of the component is increased.
Note that, fig. 3 does not indicate the thickness h of the packaging film 000, fig. 4 indicates the thickness h of the packaging film 000 on the basis of fig. 3, and fig. 3 has the same structure as the packaging film 000 of fig. 4; fig. 5 does not denote the thickness h of the encapsulation film 000, fig. 6 denotes the thickness h of the encapsulation film 000 on the basis of fig. 5, and fig. 5 is identical to the encapsulation film 000 of fig. 6 in structure. In fig. 1 to 6, only the central area 1 and the edge area 2 each include the first adhesive film 3 and the second adhesive film 4 are illustrated as examples, and in some other embodiments of the present invention, the edge area 2 may also include only the first adhesive film 3, and no matter what structure is adopted, it is only required that the central area 1 includes the first adhesive film 3 and the second adhesive film 4, and the edge area 2 includes the first adhesive film 3.
Alternatively, referring to fig. 1 to 6, the thickness h1 of the edge region 2 is 73 μm to 195 μm larger than the thickness h2 of the center region 1, the thickness h2 of the center region 1 is 211 μm to 612 μm, and the thickness h1 of the edge region 2 is 284 μm to 807 μm. For example, the thickness h1 of the edge region 2 may be 80 μm, 100 μm, 150 μm, the thickness h2 of the center region 1 may be 211 μm, 300 μm, 500 μm, and the thickness h1 of the edge region 2 may be 284 μm, 500 μm, 800 μm, which are larger than the thickness h2 of the center region 1. The thickness h1 of the edge area 2 is larger than the thickness h2 of the central area 1, a structure with thin middle and thick edge of the packaging adhesive film 000 is formed, the thickness of the adhesive film loss of the edge area 2 in the hot pressing process is compensated, the defects of adhesive shortage and the like caused by overflow of the laminated packaging adhesive film 000 are avoided, delamination phenomenon among layers of the adhesive film is prevented, the buffering performance of the assembly is improved, the generation of bubbles at the edge of the assembly is reduced, the risk of delamination at the edge of the assembly is reduced, and the photoelectric conversion efficiency of the assembly is improved. However, if the thickness is less than 73 μm, the edge portion becomes thinner, and it is difficult to compensate for the thickness lost by the adhesive film in the edge region 2 during the hot pressing process, and the assembly is liable to suffer from problems such as air bubbles and delamination. If the thickness is more than 195 μm, the problem of the thinner edge portion of the module can be solved to some extent, but the excessive thickness makes lamination difficult, which not only increases labor cost but also complicates operation and affects productivity. The thickness h2 of the central area 1 is 211-612 mu m, the thickness h1 of the edge area 2 is 284-807 mu m, the filling amount of the laminated adhesive film is ensured, the probability of overflowing adhesive is effectively reduced, the risk of splitting of the battery piece 5 in the lamination and subsequent use processes is reduced, meanwhile, the bonding force between component structures is increased, the appearance defect phenomenon of delamination of surface layer materials of the component can be effectively improved, the product yield is improved, the reliability of the product is ensured, and the manufacturing cost of the component is reduced. However, if the thickness of the packaging film is less than 211 μm in the central area 1, the packaging film 000 is too thin, so that the battery piece 5 is easily broken or hidden to be cracked, and the power of the assembly is attenuated; if the thickness is greater than 612 μm, the packaging film 000 is too thick, which is prone to overflow, and increases the manufacturing cost of the component. However, if the thickness of the edge area 2 is smaller than 284 μm, the edge part is thinner, the thickness of the adhesive film loss of the edge area 2 is difficult to compensate in the hot pressing process, and the assembly is easy to generate the problems of bubbles, delamination and the like; if the thickness is more than 807 μm, the problem of the thinner edge portion of the module can be solved to some extent, but the excessive thickness makes lamination difficult, which not only increases labor cost but also complicates operation and affects productivity.
Optionally, the first adhesive film 3 is a POE adhesive film, and the second adhesive film 4 is an EVA adhesive film. The EVA adhesive film and the POE adhesive film have the characteristics of excellent light transmittance, electrical insulation, water vapor barrier property, excellent weather resistance, PID resistance and the like, the risk of cracking of the battery piece 5 in the lamination and subsequent use processes is reduced, meanwhile, the adhesive force between component structures is increased, the appearance defect phenomenon of delamination of surface layer materials of the components can be effectively improved, the product yield is improved, and the reliability of the product is ensured. The packaging adhesive film 000 obtained by co-extruding the EVA adhesive film and the POE adhesive film not only maintains the convenience and high cohesiveness of the lamination process of the EVA adhesive film, but also has the high barrier property and weather resistance of the POE adhesive film.
Note that, in this embodiment, the first adhesive film 3 and the second adhesive film 4 may also be PET adhesive films, PVB adhesive films, and the like, and the embodiment is not particularly limited.
Alternatively, referring to fig. 1 to 6, in the central region 1, the thickness h4 of the first adhesive film 3 is 37 μm to 469 μm, and the thickness h6 of the second adhesive film 4 is 52 μm to 477 μm; in the edge area 2, the thickness h3 of the first adhesive film 3 is 284 μm to 682 μm, and the thickness h5 of the second adhesive film 4 is less than or equal to 125 μm. For example, the thickness h4 of the first adhesive film 3 in the central region 1 may be 40 μm, 200 μm, 300 μm, and the thickness h6 of the second adhesive film 4 may be 60 μm, 300 μm, 400 μm; the thickness h3 of the first adhesive film 3 in the edge region 2 may be 284 μm, 500 μm, 600 μm, and the thickness h5 of the second adhesive film 4 may be 20 μm, 50 μm, 100 μm. The structure that the middle of the first adhesive film 3 is thin, the middle of the edge is thick, and the structure that the edge is thin is formed by setting different thicknesses of the first adhesive film 3 and the second adhesive film 4, and the structure that the edge is thick is formed by thickening the thickness h3 of the first adhesive film 3 in the edge area 2, so that the content of the first adhesive film 3 in the edge area 2 is higher than the content of the first adhesive film 3 in the central area 1, the packaging adhesive film 000 has the advantages of PID resistance, high water resistance, skid resistance and the like, meanwhile, weather resistance is improved, the risk of delamination at the edge of the assembly is reduced, the content of the second adhesive film 4 in the edge area 2 is lower than the content of the second adhesive film 4 in the central area 1 by thinning the thickness h5 of the second adhesive film 4 in the edge area 2, the fluidity of the packaging adhesive film 000 can be reduced, the crosslinking degree of the packaging adhesive film 000 is controlled, the migration of the auxiliary agent is avoided, and the comprehensive performances such as viscosity performance, mechanical performance and creep resistance are improved. However, if the thickness h4 of the first adhesive film 3 in the central area 1 is smaller than 37 μm, the first adhesive film 3 is too thin, so that the battery piece 5 is easily broken or hidden to crack, the power of the assembly is attenuated, the bonding force between the assembly structures is reduced, and appearance defects caused by delamination easily occur after the assembly ages; if the thickness h4 of the first adhesive film 3 is greater than 469 μm, the first adhesive film 3 is too thick, which is easy to overflow, and increases the manufacturing cost of the assembly. If the thickness h6 of the second adhesive film 4 is smaller than 52 μm, the second adhesive film 4 is too thin, so that the battery piece 5 is easily broken or hidden to crack, the power of the assembly is attenuated, the adhesive force between the assembly structures is reduced, and appearance defects caused by delamination easily occur after the assembly ages; if the thickness h6 of the second adhesive film 4 is greater than 477 μm, the thickness of the second adhesive film 4 is too large to be laminated, which not only increases labor cost but also complicates operation and affects productivity. However, if the thickness h3 of the first adhesive film 3 in the edge area 2 is smaller than 284 μm, the edge portion is thinner, and it is difficult to compensate the thickness of the adhesive film lost in the edge area 2 in the hot pressing process, and the assembly is prone to problems such as air bubbles and delamination; if the thickness h3 of the first adhesive film 3 is larger than 682 μm, the problem of the thinner edge portion of the module can be solved to some extent, but the excessive thickness makes lamination difficult, which not only increases labor cost but also complicates operation and affects productivity. If the thickness h5 of the second adhesive film 4 is greater than 125 μm, the problem of the thinner edge portion of the module can be solved to some extent, but the excessive thickness makes lamination difficult, which not only increases labor cost but also complicates operation and affects productivity.
Optionally, the EVA adhesive film comprises the following components in parts by mass: 100 parts of ethylene-vinyl acetate copolymer resin, 0.1 to 1.0 part of cross-linking agent, 0.1 to 1.0 part of auxiliary cross-linking agent, 0.2 to 2.0 parts of silane coupling agent and 0.1 to 1.0 part of anti-aging agent. The ethylene-vinyl acetate copolymer resin has good formability, transparency, flexibility and light resistance as a main structure of the adhesion promoting polymer, and can well solve the problem of insufficient adhesion between the packaging film 000 and glass, and can inhibit the adhesive film from rapidly melting or deviating from the position and oozing out from the end of the substrate when laminating. However, when the content of the adhesion promoting polymer is too high, it may bring about uneconomical production costs; when the content of the adhesion promoting polymer is too low, the effect of improving the adhesion of the encapsulating film 000 is not obvious, and the long-term use of the encapsulating film 000 cannot be ensured. The cross-linking agent is used as one of the raw materials of the EVA adhesive film, and has the main function of ensuring that the packaging adhesive film 000 has enough cross-linking degree and providing the packaging adhesive film 000 with enough mechanical property and creep resistance. The content of the crosslinking agent is 0.1 to 1.0 parts, and for example, 0.3 parts, 0.5 parts, and 0.7 parts can be used. However, when the amount of the crosslinking agent exceeds 1.0 part, the crosslinking speed of the encapsulating film 000 is too high, the lamination appearance is difficult to control, and the problem of bubbles often occurs; when the amount of the polymer is less than 0.1 part, the crosslinking degree of the obtained packaging adhesive film 000 is insufficient, the problem of displacement of the battery piece 5 occurs when the assembly is applied, and the safety cannot be ensured. The auxiliary crosslinking agent is used as one of the raw materials of the EVA adhesive film, so that the crosslinking speed and the crosslinking depth of the packaging adhesive film 000 can be improved, and the process application range of the assembly lamination operation can be increased. The auxiliary crosslinking agent may be 0.1 to 1.0 parts, for example, 0.3 parts, 0.5 parts, or 0.7 parts. When the amount of the auxiliary crosslinking agent exceeds 1.0 part, the compatibility with the ethylene-vinyl acetate copolymer resin is poor, resulting in difficulty in production of the packaging film 000 and reduced light transmittance; when the amount is less than 0.1 part, the crosslinking speed and crosslinking depth of the polyolefin encapsulating film 000 are insufficient. The silane coupling agent is used as one of the raw materials of the EVA adhesive film, is beneficial to reducing the dosage of the crosslinking agent and the auxiliary crosslinking agent in the packaging adhesive film 000 to crosslink the resin matrix, so that the formula contains less or no polar small molecule auxiliary agent, is beneficial to greatly reducing the auxiliary agent residue after lamination of the packaging adhesive film 000, avoiding the adverse effect caused by precipitation and migration of the polar small molecule auxiliary agent in the processing and storage processes of the packaging adhesive film 000, reducing the problems of bubbles, snail marks and the like in the manufacturing process of the assembly, further reducing the production cost of the packaging adhesive film 000, shortening the lamination time and improving the production efficiency. The content of the silane coupling agent is 0.2 to 2.0 parts, and for example, may be 0.5 parts, 1.0 parts, or 1.5 parts. When the amount of the silane coupling agent exceeds 2.0 parts, compatibility problems of the silane coupling agent and the olefin polymer may occur; when the amount is less than 0.2 parts, the adhesive force of the encapsulating film 000 is low. The anti-aging agent is beneficial to improving the aging resistance of the adhesive film. 0.1 to 1.0 part of an antioxidant may be, for example, 0.3 part, 0.5 part, or 0.7 part. When the amount of the anti-aging agent exceeds 1.0 part, the problem of excessive use of the anti-aging agent is generated, and the yellowing and the transparency of the packaging adhesive film are reduced; when the amount thereof is less than 0.1 part, the anti-aging effect of the packaging film 000 is insufficient, and it is difficult to ensure a long service life of the solar module. The POE adhesive film comprises the following components in parts by mass: 100 parts of ethylene-alpha olefin copolymer resin, 10-50 parts of polar reinforced resin, 2-10 parts of creep-resistant reinforced resin, 0.3-1.0 part of cross-linking agent, 0.2-2.0 parts of auxiliary cross-linking agent, 0.2-2.0 parts of silane coupling agent and 0.1-1.0 parts of anti-aging agent. The ethylene-alpha olefin copolymer resin can provide a guarantee for the low temperature resistance of the encapsulation film 000, and can protect the battery cells 5 in the module from breakage due to impact of external force even in extremely cold places. However, when the content of the ethylene- α -olefin copolymer resin is too high, it may bring about uneconomical production costs; when the content of the ethylene- α -olefin copolymer resin is too low, the effect of improving the low temperature resistance of the encapsulating film 000 is not obvious, and the long-term use of the encapsulating film 000 cannot be ensured. The POE adhesive film is also added with the polarity reinforcing resin, so that the compatibility of the polar auxiliary agent can be improved, and uneven reaction caused by uneven migration content of the cross-linking agent, the auxiliary cross-linking agent and the like in the POE adhesive film to the surface or the EVA adhesive film is avoided. The content of the polar reinforcing resin is 10 to 50 parts, and for example, 15 parts, 30 parts, or 45 parts may be used. When the amount of the polar reinforcing resin exceeds 50 parts, it may bring about uneconomical production costs; when the amount is less than 10 parts, it is difficult to avoid the adverse effects caused by precipitation and migration of the polar small molecule auxiliary agent during processing and storage of the packaging adhesive film 000, and the problems of bubbles, snail marks and the like occur during the manufacturing process of the component. The creep-resistant reinforced resin is also added into the POE adhesive film, so that the fluidity of the POE adhesive film is reduced, and the heat-resistant creep performance of the adhesive film is improved. The creep-resistant reinforcing resin may be contained in an amount of 2 to 10 parts, for example, 5 parts, 7 parts, or 9 parts. When the creep-resistant reinforcing resin is used in an amount exceeding 10 parts, it may bring about uneconomical production costs; when the amount is less than 2 parts, the POE ink-adding overflow at the edge part of the assembly is extruded during lamination pressurization, so that the phenomena of bubbles, edge gaps, delamination and the like are caused, and the encapsulation effect is affected. The cross-linking agent is used as one of the raw materials of the POE adhesive film, and has the main function of ensuring that the packaging adhesive film 000 has enough cross-linking degree and providing the packaging adhesive film 000 with enough mechanical property and creep resistance. The content of the crosslinking agent is 0.3 to 1.0 parts, and for example, may be 0.3 parts, 0.5 parts, or 0.7 parts. However, when the amount of the crosslinking agent exceeds 1.0 part, the crosslinking speed of the encapsulating film 000 is too high, the lamination appearance is difficult to control, and the problem of bubbles often occurs; when the amount of the polymer is less than 0.3 part, the crosslinking degree of the obtained packaging adhesive film 000 is insufficient, the problem of displacement of the battery piece 5 occurs when the assembly is applied, and the safety cannot be ensured. The auxiliary crosslinking agent is used as one of the raw materials of the POE adhesive film, so that the crosslinking speed and the crosslinking depth of the packaging adhesive film 000 can be improved, and the process application range of the assembly lamination operation can be increased. The auxiliary crosslinking agent is 0.2 to 2.0 parts, for example, 0.3 parts, 0.5 parts, and 0.7 parts. When the amount of the auxiliary crosslinking agent exceeds 2.0 parts, the compatibility with the ethylene-vinyl acetate copolymer resin is poor, resulting in difficulty in production of the packaging film 000 and reduced light transmittance; when the amount is less than 0.2 parts, the crosslinking speed and crosslinking depth of the polyolefin encapsulating film 000 are insufficient. The silane coupling agent is used as one of the raw materials of the POE adhesive film, so that the consumption of the crosslinking agent and the auxiliary crosslinking agent in the packaging adhesive film 000 is reduced, the resin matrix is crosslinked, and the formula contains a small amount of polar small molecule auxiliary agent or does not contain polar small molecule auxiliary agent, so that the auxiliary agent residue after lamination of the packaging adhesive film 000 is greatly reduced, the adverse effects caused by precipitation and migration of the polar small molecule auxiliary agent in the processing and storage processes of the packaging adhesive film 000 are avoided, the problems of bubbles, snail lines and the like in the manufacturing process of the assembly are reduced, the production cost of the packaging adhesive film 000 is further reduced, the lamination time is shortened, and the production efficiency is improved. The content of the silane coupling agent is 0.2 to 2.0 parts, and for example, may be 0.5 parts, 1.0 parts, or 1.5 parts. When the amount of the silane coupling agent exceeds 2.0 parts, compatibility problems of the silane coupling agent and the olefin polymer may occur; when the amount is less than 0.2 parts, the adhesive force of the encapsulating film 000 is low. The anti-aging agent is beneficial to improving the aging resistance of the adhesive film. 0.1 to 1.0 part of an antioxidant may be, for example, 0.3 part, 0.5 part, or 0.7 part. When the amount of the anti-aging agent exceeds 1.0 part, the problem of excessive use of the anti-aging agent is generated, and the yellowing and the transparency of the packaging adhesive film are reduced; when the amount thereof is less than 0.1 part, the anti-aging effect of the packaging film 000 is insufficient, and it is difficult to ensure a long service life of the solar module.
Optionally, the ethylene-vinyl acetate copolymer resin has a vinyl acetate content of 25% to 33%, and vinyl acetate has good transparency and elasticity, and when the vinyl acetate content is less than 25%, the resulting encapsulating film 000 does not have sufficient light transmittance when crosslinked and cured at high temperature; when the content of the vinyl acetate exceeds 33%, small molecular substances such as carboxylic acid, alcohol, amine and the like are easy to generate in the later use process, and the service life of the solar cell module is influenced; the alpha olefin in the ethylene-alpha olefin copolymer resin comprises at least one of propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene and 1-octene; the cross-linking agent comprises at least one of 1, 1-di (tert-butyl peroxy) -3, 5-trimethylcyclohexane, 2, 5-dimethylhexane-2, 5-di-tert-butyl peroxide, 2, 5-dimethyl-2, 5-bis (benzoyl peroxy) -hexane, dicumyl peroxide and bis (tert-butyl isopropyl peroxide) benzene; the auxiliary cross-linking agent comprises at least one of diethylene glycol dimethacrylate, N' -m-phenyl bismaleimide, 1,3, 5-triallyl-s-triazine-2, 4, 6-trione, triallyl isocyanurate, triallyl cyanurate, trimethylolpropane trimethacrylate, trivinyl trimethyl cyclotrisiloxane, 1, 2-polybutadiene, pentaerythritol triacrylate, pentaerythritol tetramethyl tetraacrylate and tetravinyl tetramethyl cyclotetrasiloxane; the coupling agent comprises at least one of gamma-chloropropyl methoxysilane, vinyl ethoxysilane, vinyl tri (beta-methoxyethoxy) silane, gamma-methacryloxypropyl trimethoxysilane, vinyl triacetoxy silane, gamma-glycidol ether oxypropyl trimethoxysilane and the like; the anti-aging agent comprises at least one of ultraviolet light absorber, light stabilizer, antioxidant, hydrolysis inhibitor, acid absorber and metal ion scavenger.
The ultraviolet light absorber, the light stabilizer, the antioxidant, the hydrolysis inhibitor, the acid absorber, and the metal ion scavenger in this embodiment may be any auxiliary agents conventionally used in the art, and may be obtained by purchasing them through a known commercial channel.
Optionally, the polar reinforcing resin comprises at least one of ethylene-alpha olefin maleic anhydride graft copolymer and ethylene-alpha olefin silane graft copolymer, the grafting rate is 0.5% -3.0%, for example, the grafting rate can be 0.5%, 1.5% and 3.0%, and the proper grafting rate can increase the bonding strength of POE adhesive film and glass, so as to prevent delamination phenomenon in the using process of the component. However, when the grafting rate is less than 0.5%, the silane terminal chains grafted on the polymer molecules are fewer, and the adhesive force of the packaging adhesive film 000 is low; when the grafting ratio is more than 3.0%, the preservation of the packaging film 000 is not facilitated, and the aging performance thereof is also adversely affected. The creep-resistant reinforced resin comprises at least one of polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-butene copolymer, ethylene-pentene copolymer, ethylene-octene copolymer or ethylene-hexene copolymer, and the melting point is 90-130 ℃. The polar reinforcing resin is added into the POE adhesive film, so that the compatibility of the polar auxiliary agent can be improved, and uneven reaction caused by uneven migration content of the cross-linking agent, the auxiliary cross-linking agent and the like in the POE adhesive film to the surface or the EVA adhesive film is avoided. The creep-resistant reinforced resin is also added into the POE adhesive film, so that the fluidity of the POE adhesive film is reduced, and the heat-resistant creep performance of the adhesive film is improved.
In the actual preparation of the packaging adhesive film 000, after the raw materials of the first adhesive film 3 and the raw materials of the second adhesive film 4 are respectively and uniformly mixed, the raw materials are added into different extruders, the extruded materials of the first adhesive film 3 and the extruded materials of the second adhesive film 4 are respectively melted and plasticized and then are injected into the same die head, a melt flow is formed by combining in the die head, and the packaging adhesive film 000 is obtained through the procedures of melting extrusion, casting film formation, cooling, slitting, winding and the like.
Alternatively, referring to fig. 1 to 6, the width h7 of the edge region 2 is 10mm to 200mm along the first direction X. The proper width h7 of the edge area 2 is set, so that a structure that the central area 1 of the packaging adhesive film 000 is thin and the edge area 2 is thick is formed, the thickness of the adhesive film loss of the edge area 2 in the hot pressing process is compensated, the abnormalities such as adhesive shortage caused by overflow of the laminated packaging adhesive film 000 are avoided, delamination phenomenon among layers of the adhesive film is prevented, and the photoelectric conversion efficiency of the assembly is improved. When the width h7 of the edge area 2 is larger than 200mm, in order to ensure that the thickness h1 of the edge area 2 is larger than the thickness h2 of the central area 1, so that the risk of hidden cracking of the outer battery piece 5 is reduced, the thickness h1 of the edge area 2 is increased, but excessive adhesive film gram weight is increased due to excessive width, and the manufacturing cost is not controlled; when the width h7 of the edge region 2 is less than 10mm, it is difficult to compensate for the thickness lost by the adhesive film of the edge region 2 during the hot pressing, resulting in abnormality such as lack of adhesive caused by overflow of the laminated packaging adhesive film 000, and delamination phenomenon occurs between the layers of the adhesive film.
Fig. 7 is a schematic plan view of a packaging film applied to a photovoltaic module according to the present invention, referring to fig. 1 to 7, the embodiment of the present invention further provides a photovoltaic module 100, which includes a front packaging layer 101, a first packaging film 102, a battery sheet layer 103, a second packaging film 104, and a back packaging layer 105, which are sequentially disposed, wherein at least one of the first packaging film 102 and the second packaging film 104 is the packaging film 000 provided in any embodiment of the present invention.
When the photovoltaic module 100 is actually prepared, a first packaging adhesive film 102 is filled between the front packaging layer 101 and the battery piece layer 103, a second packaging adhesive film 104 is filled between the back packaging layer 105 and the battery piece layer 103, the first packaging adhesive film 102 and the second packaging adhesive film 104 can be formed through a coextrusion process, the flowability of the adhesive films at a certain temperature and pressure is increased, and the three layers of module materials of the front packaging layer 101, the battery piece layer 103 and the back packaging layer 105 are bonded and packaged, so that the module is prevented from being damaged, the weather resistance is improved, and meanwhile, the risk of delamination at the edge of the photovoltaic module 100 is reduced.
It should be noted that, fig. 7 of the present embodiment is only a schematic illustration of the first packaging film 102 and the second packaging film 104, which are the packaging film 000 provided in any embodiment of the present invention, and in some other embodiments of the present invention, the first packaging film 102 or the second packaging film 104 is the packaging film 000 provided in any embodiment of the present invention, which is not limited herein, and no matter what structure is adopted, it is only required to satisfy that at least one of the first packaging film 102 and the second packaging film 104 is the packaging film 000 provided in any embodiment of the present invention.
According to the embodiment, the packaging adhesive film and the photovoltaic module provided by the invention have the following beneficial effects:
according to the packaging adhesive film and the photovoltaic module, the first adhesive film and the second adhesive film are arranged to form the three-layer packaging adhesive film, so that the corrosion of water vapor to the packaging adhesive film is avoided, and the water vapor resistance of the photovoltaic module is improved. Through setting up the thickness in marginal district and being greater than the thickness in central district, compensated the thickness of the glued membrane loss in hot pressing in-process marginal district, avoided the laminating encapsulation glued membrane overflow to lead to lacks the gum etc. unusual to prevent that delamination phenomenon from appearing at the subassembly edge, can effectively promote the anti PID performance of glued membrane simultaneously, promote photovoltaic module photoelectric conversion efficiency. In addition, the thickness ratio of the first adhesive film to the second adhesive film in the central area is set to be thinner than the thickness ratio of the first adhesive film to the second adhesive film in the edge area, the middle of the first adhesive film is combined to be thicker than the middle of the second adhesive film, the thickness of the first adhesive film in the edge area is thickened to ensure that the content of the first adhesive film in the edge area is higher than the content of the first adhesive film in the central area, the packaging adhesive film has the advantages of PID resistance, high water resistance, skid resistance and the like, the weather resistance is improved, the hidden cracking risk of an edge battery piece and the edge delamination risk of a photovoltaic module are reduced, the content of the second adhesive film in the edge area is lower than the content of the second adhesive film in the central area by thinning the thickness of the second adhesive film in the edge area, the crosslinking degree of the packaging adhesive film can be controlled to avoid migration of auxiliaries, the comprehensive performances such as viscosity performance, mechanical performance and creep resistance are improved, the cost is low, the process is simple, and the industrialized popularization is facilitated.
While certain specific embodiments of the invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (9)
1. An encapsulation adhesive film, which is characterized in that: the packaging adhesive film comprises a central area and edge areas arranged on the side edges of the central area, wherein the edge areas are respectively positioned on two sides of the central area along the first direction, and the thickness of the edge areas is larger than that of the central area;
the packaging adhesive film comprises a first adhesive film and a second adhesive film, wherein the surface of the first adhesive film, which is close to one side of the battery piece, and the surface of the first adhesive film, which is far away from one side of the battery piece, are provided with the second adhesive film;
the thickness ratio of the first adhesive film to the second adhesive film in the central area is different from the thickness ratio of the first adhesive film to the second adhesive film in the edge area;
the thickness of the first adhesive film in the edge area is larger than that of the first adhesive film in the central area, and the thickness of the second adhesive film in the edge area is smaller than that of the second adhesive film in the central area;
In the central area, the thickness ratio of the first adhesive film to the second adhesive film is 1:5-3:1; in the edge area, the thickness ratio of the first adhesive film to the second adhesive film is 6:1-1:0.
2. The packaging film according to claim 1, wherein: the thickness of the edge area is 73-195 μm larger than that of the central area, the thickness of the central area is 211-612 μm, and the thickness of the edge area is 284-807 μm.
3. The packaging film according to claim 1, wherein: the first adhesive film is a POE adhesive film, and the second adhesive film is an EVA adhesive film.
4. The packaging film according to claim 1, wherein: in the central area, the thickness of the first adhesive film is 37-469 microns, and the thickness of the second adhesive film is 52-477 microns; in the edge area, the thickness of the first adhesive film is 284-682 μm, and the thickness of the second adhesive film is less than or equal to 125 μm.
5. A packaging film according to claim 3, wherein: the EVA adhesive film comprises the following components in parts by mass: 100 parts of ethylene-vinyl acetate copolymer resin, 0.1 to 1.0 part of cross-linking agent, 0.1 to 1.0 part of auxiliary cross-linking agent, 0.2 to 2.0 parts of silane coupling agent and 0.1 to 1.0 part of anti-aging agent;
The POE adhesive film comprises the following components in parts by mass: 100 parts of ethylene-alpha olefin copolymer resin, 10-50 parts of polar reinforced resin, 2-10 parts of creep-resistant reinforced resin, 0.3-1.0 part of cross-linking agent, 0.2-2.0 parts of auxiliary cross-linking agent, 0.2-2.0 parts of silane coupling agent and 0.1-1.0 parts of anti-aging agent.
6. The packaging film according to claim 5, wherein:
the vinyl acetate content in the ethylene-vinyl acetate copolymer resin is 25% -33%;
the alpha olefin in the ethylene-alpha olefin copolymer resin comprises at least one of propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene and 1-octene;
the cross-linking agent comprises at least one of 1, 1-di (tert-butyl peroxy) -3, 5-trimethylcyclohexane, 2, 5-dimethylhexane-2, 5-di-tert-butyl peroxide, 2, 5-dimethyl-2, 5-bis (benzoyl peroxy) -hexane, dicumyl peroxide and bis (tert-butyl isopropyl peroxide) benzene;
the auxiliary cross-linking agent comprises at least one of diethylene glycol dimethacrylate, N' -m-phenyl bismaleimide, 1,3, 5-triallyl-s-triazine-2, 4, 6-trione, triallyl isocyanurate, triallyl cyanurate, trimethylolpropane trimethacrylate, trivinyl trimethyl cyclotrisiloxane, 1, 2-polybutadiene, pentaerythritol triacrylate, pentaerythritol tetramethyl tetraacrylate and tetravinyl tetramethyl cyclotetrasiloxane;
The silane coupling agent comprises at least one of gamma-chloropropyl methoxysilane, vinyl ethoxysilane, vinyl tri (beta-methoxyethoxy) silane, gamma-methacryloxypropyl trimethoxysilane, vinyl triacetoxy silane, gamma-glycidoxypropyl trimethoxysilane and the like;
the anti-aging agent comprises at least one of an ultraviolet light absorber, a light stabilizer, an antioxidant, a hydrolysis inhibitor, an acid absorber and a metal ion scavenger.
7. The packaging film according to claim 5, wherein: the polar reinforcing resin comprises at least one of ethylene-alpha olefin maleic anhydride graft copolymer and ethylene-alpha olefin silane graft copolymer, and the grafting rate is 0.5-3.0%;
the creep-resistant reinforced resin comprises at least one of polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-butene copolymer, ethylene-pentene copolymer, ethylene-octene copolymer or ethylene-hexene copolymer, and the melting point is 90-130 ℃.
8. The packaging film according to claim 1, wherein: along the first direction, the width of the edge area is 10 mm-200 mm.
9. A photovoltaic module, characterized by comprising a front packaging layer, a first packaging adhesive film, a battery piece layer, a second packaging adhesive film and a back packaging layer which are sequentially arranged, wherein at least one of the first packaging adhesive film and the second packaging adhesive film is the packaging adhesive film of any one of claims 1-8.
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| CN105646995A (en) * | 2016-02-04 | 2016-06-08 | 杭州福斯特光伏材料股份有限公司 | Snail track resistant packaging adhesive film and preparation method thereof |
| JP2018123202A (en) * | 2017-01-30 | 2018-08-09 | 株式会社トッパンＴｏｍｏｅｇａｗａオプティカルフィルム | Cushion tape |
| CN113943539A (en) * | 2021-11-26 | 2022-01-18 | 深圳市华星光电半导体显示技术有限公司 | Preparation method of barrier film and inorganic film layer for hot lamination |
| CN216928746U (en) * | 2022-02-28 | 2022-07-08 | 珠海冠宇电池股份有限公司 | Battery and packaging hardware |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6572225B2 (en) * | 2014-02-24 | 2019-09-04 | 上海海▲優▼威新材料股▲ふん▼有限公司Ｓｈａｎｇｈａｉ ＨＩＵＶ Ｎｅｗ Ｍａｔｅｒｉａｌｓ Ｃｏ．， Ｌｔｄ． | Pre-irradiated cross-linked polyolefin adhesive film and method of preparation and method and assembly for packaging |
| CN110423570A (en) * | 2019-08-13 | 2019-11-08 | 深圳市台技光电有限公司 | Tempered glass protective film suitable for ultrasonic fingerprint identification function |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105646995A (en) * | 2016-02-04 | 2016-06-08 | 杭州福斯特光伏材料股份有限公司 | Snail track resistant packaging adhesive film and preparation method thereof |
| JP2018123202A (en) * | 2017-01-30 | 2018-08-09 | 株式会社トッパンＴｏｍｏｅｇａｗａオプティカルフィルム | Cushion tape |
| CN113943539A (en) * | 2021-11-26 | 2022-01-18 | 深圳市华星光电半导体显示技术有限公司 | Preparation method of barrier film and inorganic film layer for hot lamination |
| CN216928746U (en) * | 2022-02-28 | 2022-07-08 | 珠海冠宇电池股份有限公司 | Battery and packaging hardware |
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