CN117683474A - High-water-resistance white co-extrusion photovoltaic adhesive film applied to TOPCON (top of Con) single-glass assembly - Google Patents
High-water-resistance white co-extrusion photovoltaic adhesive film applied to TOPCON (top of Con) single-glass assembly Download PDFInfo
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- 239000002313 adhesive film Substances 0.000 title claims abstract description 46
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- 230000000903 blocking effect Effects 0.000 claims abstract description 22
- 238000004806 packaging method and process Methods 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 239000003431 cross linking reagent Substances 0.000 claims description 76
- 229920005989 resin Polymers 0.000 claims description 71
- 239000011347 resin Substances 0.000 claims description 71
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 36
- 239000003963 antioxidant agent Substances 0.000 claims description 36
- 230000003078 antioxidant effect Effects 0.000 claims description 34
- 239000010954 inorganic particle Substances 0.000 claims description 28
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 23
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 22
- 239000000203 mixture Substances 0.000 claims description 22
- 239000002245 particle Substances 0.000 claims description 19
- 238000005266 casting Methods 0.000 claims description 18
- 239000000155 melt Substances 0.000 claims description 16
- 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 12
- 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 12
- 239000004408 titanium dioxide Substances 0.000 claims description 11
- 239000004342 Benzoyl peroxide Substances 0.000 claims description 10
- 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 10
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- 238000004519 manufacturing process Methods 0.000 claims description 10
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- 238000002360 preparation method Methods 0.000 claims description 8
- 241000276425 Xiphophorus maculatus Species 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 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 6
- PUGOMSLRUSTQGV-UHFFFAOYSA-N 2,3-di(prop-2-enoyloxy)propyl prop-2-enoate Chemical compound C=CC(=O)OCC(OC(=O)C=C)COC(=O)C=C PUGOMSLRUSTQGV-UHFFFAOYSA-N 0.000 claims description 6
- 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 6
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 6
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 6
- 239000000347 magnesium hydroxide Substances 0.000 claims description 6
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 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 5
- GTELLNMUWNJXMQ-UHFFFAOYSA-N 2-ethyl-2-(hydroxymethyl)propane-1,3-diol;prop-2-enoic acid Chemical class OC(=O)C=C.OC(=O)C=C.OC(=O)C=C.CCC(CO)(CO)CO GTELLNMUWNJXMQ-UHFFFAOYSA-N 0.000 claims description 5
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 claims description 5
- WOXXJEVNDJOOLV-UHFFFAOYSA-N ethenyl-tris(2-methoxyethoxy)silane Chemical compound COCCO[Si](OCCOC)(OCCOC)C=C WOXXJEVNDJOOLV-UHFFFAOYSA-N 0.000 claims description 4
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 claims description 4
- 239000000395 magnesium oxide Substances 0.000 claims description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 3
- 230000004048 modification Effects 0.000 claims description 3
- 238000012986 modification Methods 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- 150000001282 organosilanes Chemical class 0.000 claims description 2
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 238000002834 transmittance Methods 0.000 abstract description 5
- 239000005038 ethylene vinyl acetate Substances 0.000 description 140
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 140
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- FGHOOJSIEHYJFQ-UHFFFAOYSA-N (2,4-ditert-butylphenyl) dihydrogen phosphite Chemical compound CC(C)(C)C1=CC=C(OP(O)O)C(C(C)(C)C)=C1 FGHOOJSIEHYJFQ-UHFFFAOYSA-N 0.000 description 1
- HFOFUFRTMGKDQH-UHFFFAOYSA-N 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoic acid;octadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCCCO.CC(C)(C)C1=CC(CCC(O)=O)=CC(C(C)(C)C)=C1O HFOFUFRTMGKDQH-UHFFFAOYSA-N 0.000 description 1
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- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 description 1
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Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
A high water blocking (water vapor transmission rate 8.0-15.0 g/(m) for TOPCO 2 Day) white co-extruded photovoltaic film comprising an upper transparent EVA layer and a lower white EVA layer. The photovoltaic adhesive film solves the problems of high water vapor transmittance and high hidden crack probability of the existing white light photovoltaic adhesive film, and meets the requirements of novel N-TOPCon single glass components on the photovoltaic packaging adhesive film in the market.
Description
Technical Field
The invention relates to the technical field of photovoltaic adhesive films, in particular to a high-water-resistance white co-extrusion photovoltaic adhesive film of a TOPCO (top surface over coax) single glass assembly
Background
TOPCON cells, collectively referred to as tunneling oxide passivation contact solar cells, are a new type of passivation contact solar cells. In the TOPCON battery preparation process, a layer of ultrathin SiO is prepared on the back of the battery 2 The passivation contact structure formed by the passivation contact structure and the deposited doped polysilicon thin layer can effectively reduce the recombination of surface electron-holes, thereby improving the photoelectric conversion efficiency of the TOPCO battery. Compared with the traditional PERC battery, the electrode on the front surface of the TOPCO battery is improved from pure silver paste to silver aluminum paste, and water vapor can invade the front surface of the battery through gaps in the battery array to corrode the silver aluminum paste, so that the photo-electric conversion efficiency of a battery piece is reduced, and the power generation efficiency of the TOPCO battery is reduced. The photovoltaic backboard used on the back of the N-type single glass component has higher water vapor transmittance value (-2 g/(m) relative to the glass backboard 2 Day), the corrosion of the N-type battery sheet by the water vapor cannot be completely blocked. Therefore, the high-water-resistance white photovoltaic adhesive film suitable for the TOPCON single-glass assembly is developed, long-acting operation of the N-type single-glass battery assembly can be guaranteed, the high-reflection white adhesive film can also improve the power generation efficiency of the single-glass assembly, and the high-water-resistance white adhesive film is a research and development focus of the photovoltaic battery packaging industry.
CN201710785198.2 discloses a low-melting-point EVA three-layer composite white-light-voltage adhesive film, which comprises a middle white EVA layer, an upper transparent EVA layer and a lower transparent EVA layer, wherein the upper transparent EVA layer and the lower transparent EVA layer are arranged on the middle white EVA layer, and the mass percentage of the white EVA layer is as follows: the low-melting-point ethylene-vinyl acetate copolymer resin contains 80% -95%, white filler 5% -20%, antioxidant 0.05% -5%, cross-linking agent 0.25% -2% and silane coupling agent 0.1% -4%.
CN201710785199.7 discloses a low-melting-point EVA composite white-light photovoltaic adhesive film, which comprises a lower white EVA layer and an upper transparent EVA layer, wherein the white EVA layer comprises the following components in percentage by mass: the low melting point ethylene-vinyl acetate copolymer resin contains 80% -95%, the white filler contains 5% -20%, the antioxidant contains 0.05% -5%, the cross-linking agent contains 0.25% -2%, and the silane coupling agent contains 0.1% -4%; the transparent EVA layer comprises the following components in percentage by mass: the low-melting-point ethylene-vinyl acetate copolymer resin contains 87% -98%, the antioxidant contains 0.05% -5%, the cross-linking agent contains 0.25% -2%, and the silane coupling agent contains 0.1% -4%. The transparent layer EVA of the composite white adhesive film disclosed in the patent can bring high visible light reflectivity by introducing white filler, so that the power generation of the component is improved, but the filler is shaped into a conventional irregular shape, so that good barrier to water vapor cannot be formed, and meanwhile, the white filler is as follows: white inorganic particles of titanium dioxide, white carbon black and barium sulfate do not contain alkaline white inorganic substances, and do not show acid absorption performance, so that the requirements of TOPCO batteries on water vapor and acid resistance of packaging adhesive films cannot be met.
CN202111292086.6 discloses a white-light photovoltaic film and its preparation method, the raw materials of the white-light photovoltaic film comprise, by weight, 90-93% of EVA particles, 0.5-1% of cross-linking agent, 0.05-0.2% of auxiliary cross-linking agent, 0.05-0.3% of coupling agent, 0.1-0.3% of light stabilizer and 6-9% of opacifier, the EVA particles comprise EVA particles a, and the EVA particles a are made into EVA foaming particles. The preparation method comprises the following steps: (1) Blending and stirring the EVA foaming particles and the liquid substance to enable the liquid substance to be completely absorbed by the EVA foaming particles, so as to obtain EVA master batch A; (2) Uniformly stirring and mixing the EVA particles B and solid substances, and preparing EVA master batch B by a double-screw extruder; (3) Uniformly mixing EVA master batches A, EVA master batches B with blank EVA particles, and casting into a glue film through a single screw extruder; (4) And (3) performing ultraviolet irradiation pre-crosslinking on the adhesive film obtained in the step (3) to obtain the EVA adhesive film.
Because of the white-light photovoltaic film used in the market at present, the main resin is EVA resin (ethylene-vinyl acetate polymer) with water vapor permeability of-20 g/(m) 2 Day), cannot meet the current TOPCOAnd the packaging requirement of the n single glass battery on the adhesive film with low water vapor transmittance is met. In addition, the white light photovoltaic adhesive film is easy to cause the problems of white overflow, flanging and wrinkling in the lamination process of the assembly, so that the appearance of the assembly is influenced, the battery and the welding strip are shielded, and the reliability and the power of the assembly are influenced. Through the pre-crosslinking treatment of the white adhesive film by the electron beam, the mobility of the pre-crosslinked white adhesive film is obviously reduced, but the hardness of the pre-crosslinked white adhesive film is correspondingly increased, so that the probability of hidden cracking of the battery piece in the lamination process is obviously improved. The thickness of the TOPCON battery piece is 10-20 mu m lower than that of the P-type battery piece, and the probability of hidden cracking of the battery piece can be greatly improved when the white light photovoltaic adhesive film with the same pre-crosslinking degree is used. Therefore, a white light photovoltaic film suitable for TOPCON single-glass modules is lacking.
Disclosure of Invention
The invention provides a high-water-blocking white co-extrusion photovoltaic adhesive film, which is particularly suitable for the performance requirement of an N-type single glass component, and aims to solve the problems that the existing white photovoltaic adhesive film is high in water vapor transmittance and high in hidden crack probability (generally 1.0-3.0%) and cannot meet the requirement of a novel N-TOPCON single glass component on a photovoltaic packaging adhesive film in the market.
In order to solve the above problems, the present invention firstly provides a high water blocking (water vapor transmission rate of 8.0-15.0 g/(m) which can be applied to TOPCO 2 Day)) white co-extruded photovoltaic film (as in fig. 1), comprising an upper transparent EVA layer and a lower white EVA layer,
wherein the transparent EVA layer contains: 70% -85% of EVA resin with high melt index, 15% -30% of EVA resin with low melt index, 0.3% -3% of cross-linking agent, 0.3% -3% of auxiliary cross-linking agent, 0.1% -2% of silane coupling agent and 0.05-0.5% of antioxidant;
the white EVA layer contains: 70-85% of EVA resin with low melt index, 15-30% of EVA white master batch, 0.3-3% of cross-linking agent, 0.3-2.5% of auxiliary cross-linking agent, 0.1-1.5% of silane coupling agent and 0.05-0.5% of antioxidant;
the EVA white master batch is 5-20 mu m flaky particles.
Further, the melt index of the high melt index EVA resin is not lower than 16g/10min, or 20-28g/10min, the melt index of the low melt index EVA resin is lower than 16g/10min, or 5-15g/10min, the tested melt temperature is 190 ℃, and the weight is 2.16kg.
Further, the content of the high-melting-point EVA resin in the transparent EVA layer is 72% -83%, or 75%, 78% or 80%.
Further, the content of the low-melting-point EVA resin in the transparent EVA layer is 18% -28%, or 20%, 25% or 27%.
Further, the content of the low-melt-index EVA resin in the white EVA layer is 72% -83%, or 75%, 78% or 80%.
Further, the EVA white master batch in the white EVA layer is 8-18 μm, or 10 μm or 15 μm.
Further, the EVA white master batch in the white EVA layer is inorganic particles, and the surface of the EVA white master batch is subjected to surface modification treatment by organosilane, wherein the concentration of the inorganic particles is 20% -50%, or 25%, 30%, 35%, 40% and 45%.
Further, the EVA white master batch in the white EVA layer is one or two or more of flaky magnesium hydroxide, flaky magnesium oxide, flaky titanium dioxide, flaky aluminum oxide and flaky barium sulfate.
Further, the cross-linking agent is one or more of dicumyl peroxide, tert-butyl peroxy 2-ethylhexyl carbonate, 1- (di-tert-butyl peroxide) -3, 5-trimethylcyclohexane and benzoyl peroxide.
Further, the content of the cross-linking agent is 0.5% -2.8%, or 0.8%, 1.0%, 1.5%, 2.0%, 2.5%.
Further, the auxiliary crosslinking agent is one or more of triallyl isocyanurate, triallyl cyanurate, ethoxylated trimethylolpropane triacrylate, trimethylolpropane triacrylate and propoxylated glycerol triacrylate.
Further, the content of the auxiliary cross-linking agent in the transparent EVA layer is 0.5% -2.8%, or 0.8%, 1.0%, 1.5%, 2.0%, 2.5%.
Further, the content of the auxiliary cross-linking agent in the white EVA layer is 0.5% -2.3%, or 0.8%, 1.0%, 1.5% or 2.0%.
Further, the silane coupling agent is one or more of glycidoxypropyl trimethoxysilane, gamma-methacryloxypropyl trimethoxysilane, vinyl trimethoxysilane and vinyl-tris (2-methoxyethoxy) silane.
Further, the content of the silane coupling agent in the transparent EVA layer is 0.2% to 1.8%, or 0.3%, 0.5%, 0.8%, 1.0%, 1.5%.
Further, the content of the silane coupling agent in the white EVA layer is 0.2% to 1.4%, or 0.3%, 0.5%, 0.8%, 1.0%, 1.2%.
Further, the antioxidant is one or more of pentaerythritol tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], N-stearyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, tri [2, 4-di-tert-butylphenyl ] phosphite and N, N' -1, 6-adipoyl bis (3, 5-di (1, 1-dimethylethyl) -4-hydroxy-phenylpropionyl.
Further, the content of the antioxidant is 0.08% -0.45%, or 0.1%, 0.20% and 0.25%.
Further, it is a high water blocking white co-extruded photovoltaic film for TOPCon single glass assembly.
The invention also provides application of the flaky particles in the high-water-resistance white co-extrusion photovoltaic adhesive film.
The invention also provides a preparation method of the high water-blocking white co-extrusion photovoltaic adhesive film applied to the TOPCO single glass assembly, which comprises the following preparation steps:
(1) Mixing high-melt EVA resin, low-melt EVA resin, cross-linking agent, auxiliary cross-linking agent, silane coupling agent and antioxidant to obtain transparent EVA layer resin mixture,
(2) Mixing EVA resin with low melt index, EVA white master batch, cross-linking agent, auxiliary cross-linking agent, silane coupling agent and antioxidant to obtain white EVA layer resin mixture,
(3) And respectively adding the transparent EVA layer resin mixture and the white EVA layer resin mixture into an extruder, controlling the extrusion temperature of a single screw to be 60-90 ℃, controlling the rotation speed of a melt metering pump to be 3-20roll/min, and preparing the co-extrusion white photovoltaic packaging adhesive film of the transparent layer A/white layer B by casting extrusion, wherein the production line speed is 2-40 m/min.
Further, the extrusion temperature was 65℃at 70℃at 75℃at 80℃at 85 ℃.
Further, the rotation speed of the melt metering pump is 5roll/min, 6roll/min, 9roll/min, 10roll/min and 15roll/min.
Further, the line speed of the production is 5m/min, 7m/min, 10m/min, 15m/min, 20m/min, 25m/min and 30m/min.
The invention also provides application of the high-water-resistance white co-extrusion photovoltaic film in the TOPCO single-glass assembly.
Compared with the prior art, the high-water-resistance co-extrusion white film provided by the invention has the following advantages:
(1) The invention provides a high water-blocking white co-extrusion photovoltaic adhesive film applied to a TOPCO (top of glass) single-glass assembly, which has water-blocking efficiency obviously higher than that of the existing co-extrusion white film and can meet the requirement of the TOPCO single-glass on high water permeability.
(2) According to the invention, the flaky white inorganic particles are used as the reflective particles in the white adhesive film layer, and the flaky inorganic particles are mutually piled up in the casting process (as shown in fig. 2), so that the white adhesive film layer has anisotropy. The mutually piled flaky white inorganic particles can form densely packed 'urban walls' (as shown in figure 3) to prevent water vapor from penetrating, so that the water blocking capacity of a white film layer is obviously improved.
(3) The white inorganic particles used in the high-water-resistance co-extrusion white adhesive film white layer are of a sheet-shaped structure, and have obvious orientation. The laminated structure can greatly reduce the transmittance of visible light, thereby improving the reflection efficiency of the co-extrusion white photovoltaic adhesive film on the visible light.
(4) The transparent layer is added into the co-extrusion white photovoltaic film, and due to the introduction of the transparent layer, the direct contact between the white layer and the battery silicon wafer can be avoided, and the overflow white risk of the co-extrusion white film in the lamination process is greatly reduced. Meanwhile, the hardness of the transparent film after pre-crosslinking is lower than that of the white film, so that the hidden cracking risk of the battery piece in the lamination process is reduced.
Drawings
FIG. 1 is a schematic illustration of a co-extruded white light photovoltaic film of the A/B structure.
Fig. 2 is an electron microscopic view of the flaky white inorganic particles of example 1.
FIG. 3 is a schematic illustration of a co-extruded white encapsulating film and a sheet-like white inorganic particle stacked on each other.
Detailed Description
For a better understanding of the structure and the functional features and advantages achieved by the present invention, reference will now be made in detail to the preferred embodiments of the present invention, the following of which is a detailed description.
Comparative example 1
Composition of the upper transparent EVA layer: 70% of high-melt EVA resin (melt index is 25g/10 min), 30% of low-melt EVA resin (melt index is 10g/10 min), the cross-linking agent is tert-butyl peroxy 2-ethylhexyl carbonate and dicumyl peroxide (mass ratio is 1:1), the total addition amount of the cross-linking aid is 1%, the total addition amount of the cross-linking aid is triallyl isocyanurate and propoxylated glycerol triacrylate (mass ratio is 1:1), the total addition amount of the cross-linking aid is 0.5%, the silane coupling agent is gamma-methacryloxypropyl trimethoxysilane, the addition amount of the silane coupling agent is 0.4%, the antioxidant is tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, and the addition ratio of the antioxidant is 0.1%;
composition of the lower white EVA layer: 75% of EVA resin with low melt index (melt index is 10g/10 min), 25% of EVA white master batch, wherein white inorganic particles are conventional titanium dioxide and magnesium hydroxide (not sheet-shaped), and the total addition amount of the two particles is 40% (mass fraction: tiO) 2 :Mg(OH) 2 =1:1), and the crosslinking agent is tert-butyl peroxy 2-ethylhexyl carbonate and dicumyl peroxide (mass ratio 1: 1) The total addition amount thereof was 1%, and the auxiliary crosslinking agent was triallyl isocyanurate and propoxylated glycerol triacrylate (mass ratio of 1: 1) The total addition amount of the auxiliary crosslinking agent is 0.5 percent, the silane coupling agent is gamma-methacryloxypropyl trimethoxy silane,the addition amount of the antioxidant is 0.4 percent, and the antioxidant is tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid]Pentaerythritol ester, the addition ratio of which is 0.1%;
respectively adding the transparent EVA layer resin and the white EVA resin mixture into material kettles of different extruders, controlling the extrusion temperature of a single screw to be 75 ℃, and controlling the rotating speed of a melt metering pump to be: the transparent EVA is 6.0roll/min, the white EVA is 9.0roll/min, the line speed of production is 7m/min, and the co-extrusion white light photovoltaic packaging adhesive film of A/B (transparent layer/white layer) is prepared through an extrusion casting machine. And controlling the rotation speeds of metering pumps of a transparent layer and a white layer host of the casting machine, so that the thickness of the transparent layer and the white film layer is 2:3.
Example 1
The upper transparent EVA layer comprises the following components: 70% of high-melt EVA resin (melt index is 25g/10 min), 30% of low-melt EVA resin (melt index is 10g/10 min), the cross-linking agent is tert-butyl peroxy 2-ethylhexyl carbonate and dicumyl peroxide (mass ratio is 1:1), the total addition amount of the cross-linking aid is 1%, the total addition amount of the cross-linking aid is triallyl isocyanurate and propoxylated glycerol triacrylate (mass ratio is 1:1), the total addition amount of the cross-linking aid is 0.5%, the silane coupling agent is gamma-methacryloxypropyl trimethoxysilane, the addition amount of the silane coupling agent is 0.4%, the antioxidant is tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, and the addition ratio of the antioxidant is 0.1%;
the lower white EVA layer comprises: 75% of EVA resin with low melt index (melt index is 10g/10 min), 25% of EVA white master batch, wherein white inorganic particles are the mixture of flaky titanium dioxide and flaky magnesium hydroxide, and the addition amount of the two flaky particles is 40% (mass fraction: tiO) 2 :Mg(OH) 2 =1:1), and the crosslinking agent is tert-butyl peroxy 2-ethylhexyl carbonate and dicumyl peroxide (mass ratio 1: 1) The total addition amount thereof was 1%, and the auxiliary crosslinking agent was triallyl isocyanurate and propoxylated glycerol triacrylate (mass ratio of 1: 1) The total addition amount of the auxiliary crosslinking agent is 0.5%, the silane coupling agent is gamma-methacryloxypropyl trimethoxy silane, the addition amount of the auxiliary crosslinking agent is 0.4%, and the antioxidant is tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid]Pentaerythritol ester, the addition ratio of which is 0.1%;
respectively adding the transparent EVA layer resin and the white EVA resin mixture into material kettles of different extruders, controlling the extrusion temperature of a single screw to be 75 ℃, and controlling the rotating speed of a melt metering pump to be: the transparent EVA is 6.0roll/min, the white EVA is 9.0roll/min, the line speed of production is 7m/min, and the co-extrusion white light photovoltaic packaging adhesive film of A/B (transparent layer/white layer) is prepared through an extrusion casting machine. And controlling the rotation speeds of metering pumps of a transparent layer and a white layer host of the casting machine, so that the thickness of the transparent layer and the white film layer is 2:3.
The transparent layer and the white layer in example 1 and comparative 1 were the same resin, and the proportions of the crosslinking agent, the auxiliary crosslinking agent, the silane coupling agent and the antioxidant added were the same, with the main difference that case-comparative 1 was using conventional titanium dioxide and magnesium hydroxide, and case-example 1 was using white inorganic particles titanium dioxide and magnesium hydroxide in a sheet structure.
Example 2
The upper transparent EVA layer comprises the following components: 80% of high-melt-index EVA resin (melt index is 20g/10 min), 20% of low-melt-index EVA resin (melt index is 5g/10 min), 1- (di-tert-butyl peroxide) -3, 5-trimethylcyclohexane as a crosslinking agent, 1.5% of the total addition amount, triallyl cyanurate and ethoxylated trimethylolpropane triacrylate (mass ratio of 1:2) as auxiliary crosslinking agents, 1.0% of the total addition amount of the auxiliary crosslinking agents, glycidoxypropyl trimethoxysilane and vinyl trimethoxysilane (mass ratio of 1:1) as silane coupling agents, 0.8% of the addition amount, and beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid n-octadecanol as an antioxidant, and 0.3% of the addition amount of the antioxidant;
the lower white EVA layer comprises: 75% of EVA resin with low melt index (melt index is 10g/10 min), 35% of EVA white master batch, wherein white inorganic particles are a mixture of flaky magnesium oxide and flaky titanium dioxide, the addition amount of the two flaky particles is 25% (mass fraction: mgO: tiO2 = 1:1), the cross-linking agent is 1,1- (di-tert-butyl peroxide) -3, 5-trimethylcyclohexane, the total addition amount thereof is 1.5%, the auxiliary cross-linking agent is triallyl cyanurate and ethoxylated trimethylolpropane triacrylate (mass ratio is 1:2), the total addition amount thereof is 1.0%, the silane coupling agent is glycidoxypropyl trimethoxysilane and vinyl trimethoxysilane (mass ratio is 1:1), the addition amount thereof is 0.8%, the antioxidant is beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid n-octadecanol ester, and the addition ratio thereof is 0.3%;
respectively adding the transparent EVA layer resin and the white EVA resin mixture into material kettles of different extruders, controlling the extrusion temperature of a single screw to be 75 ℃, and controlling the rotating speed of a melt metering pump to be: transparent EVA is 7.0roll/min, white EVA is 7.0roll/min, the line speed of production is 10m/min, and the co-extrusion white light photovoltaic packaging adhesive film of A/B (transparent layer/white layer) is prepared through an extrusion casting machine. And controlling the rotation speeds of metering pumps of a transparent layer and a white layer host of the casting machine, so that the thickness of the transparent layer and the white film layer is 1:1.
Example 3
The upper transparent EVA layer comprises the following components: 85% of high-melt-index EVA resin (melt index is 28g/10 min), 15% of low-melt-index EVA resin (melt index is 5g/10 min), 1- (bis-t-butyl peroxide) -3, 5-trimethylcyclohexane and benzoyl peroxide (mass ratio=2:1) as crosslinking agents, 2.0% of auxiliary crosslinking agents, triallyl cyanurate and ethoxylated trimethylolpropane triacrylate (mass ratio 1:1), 3.0% of auxiliary crosslinking agents, vinyl trimethoxysilane and vinyl-tris (2-methoxyethoxy) silane (mass ratio 2:1), 2.0% of antioxidants, and tris [2, 4-di-t-butylphenyl ] phosphite as antioxidants, and 0.5% of auxiliary crosslinking agents;
the lower white EVA layer comprises: 75% of EVA resin with low melt index (melt index is 10g/10 min), 25% of EVA white master batch, wherein white inorganic particles are a mixture of flaky aluminum oxide and flaky titanium dioxide, and the addition amount of the two flaky particles is 50% (mass fraction: al) 2 O 3 :TiO 2 =2:1), the crosslinking agents are 1,1- (t-butyl diperoxide) -3, 5-trimethylcyclohexane and benzoyl peroxide (mass ratio=2: 1) The total addition amount is 2.0%, and the auxiliary crosslinking agent is triene cyanuric acidThe total addition amount of the auxiliary cross-linking agent is 3.0 percent, the silane coupling agent is vinyl trimethoxy silane and vinyl-tri (2-methoxyethoxy) silane (the mass ratio is 2:1), the addition amount is 2.0 percent, and the antioxidant is tris [2, 4-di-tert-butylphenyl ]]Phosphite ester, the addition proportion of which is 0.5%;
respectively adding the transparent EVA layer resin and the white EVA resin mixture into material kettles of different extruders, controlling the extrusion temperature of a single screw to be 75 ℃, and controlling the rotating speed of a melt metering pump to be: the transparent EVA is 6.0roll/min, the white EVA is 9.0roll/min, the line speed of production is 7m/min, and the co-extrusion white light photovoltaic packaging adhesive film of A/B (transparent layer/white layer) is prepared through an extrusion casting machine. And controlling the rotation speeds of metering pumps of a transparent layer and a white layer host of the casting machine, so that the thickness of the transparent layer and the white film layer is 2:3.
Example 4
The upper transparent EVA layer comprises the following components: 70% of high-melt-index EVA resin (melt index is 20g/10 min), 30% of low-melt-index EVA resin (melt index is 15g/10 min), the total adding amount of the crosslinking agent is 0.6% of dicumyl peroxide and benzoyl peroxide (mass ratio=1:2), the total adding amount of the auxiliary crosslinking agent is trimethylolpropane triacrylate, the total adding amount of the auxiliary crosslinking agent is 1.5%, the adding amount of the silane coupling agent is gamma-methacryloxypropyl trimethoxysilane, the adding amount of the silane coupling agent is 0.5%, the antioxidant is N, N' -1, 6-adipoyl bis (3, 5-bis (1, 1-dimethylethyl) -4-hydroxy-benzoyl, and the adding ratio is 0.05%;
the lower white EVA layer comprises: 80% of EVA resin with low melt index (melt index is 10g/10 min), 20% of EVA white master batch, wherein white inorganic particles are mixture of flaky barium sulfate and flaky titanium dioxide, and the addition amount of the two flaky particles is 35% (mass fraction: ba) 2 SO 4 :TiO 2 =1:1), and the crosslinking agent is dicumyl peroxide and benzoyl peroxide (mass ratio=1: 2) The total addition amount of the auxiliary crosslinking agent is 0.6 percent, the auxiliary crosslinking agent is trimethylolpropane triacrylate, the total addition amount of the auxiliary crosslinking agent is 1.5 percent, the silane coupling agent is gamma-methacryloxypropyl trimethoxy silane, and the addition amount of the silane coupling agent is gamma-methacryloxypropyl trimethoxy silane0.5 percent of antioxidant is N, N' -1, 6-adipoyl bis (3, 5-bis (1, 1-dimethylethyl) -4-hydroxy-phenylpropionyl) with the addition ratio of 0.05 percent;
respectively adding the transparent EVA layer resin and the white EVA resin mixture into material kettles of different extruders, controlling the extrusion temperature of a single screw to be 75 ℃, and controlling the rotating speed of a melt metering pump to be: transparent EVA is 7.0roll/min, white EVA is 7.0roll/min, the line speed of production is 10m/min, and the co-extrusion white light photovoltaic packaging adhesive film of A/B (transparent layer/white layer) is prepared through an extrusion casting machine. And controlling the rotation speeds of metering pumps of a transparent layer and a white layer host of the casting machine, so that the thickness of the transparent layer and the white film layer is 1:1.
Example 5
The upper transparent EVA layer comprises the following components: 85% of high-melt-index EVA resin (melt index is 20g/10 min), 15% of low-melt-index EVA resin (melt index is 15g/10 min), the total adding amount of the crosslinking agent is 0.8% of dicumyl peroxide and benzoyl peroxide (mass ratio=1:2), the total adding amount of the auxiliary crosslinking agent is trimethylolpropane triacrylate, the total adding amount of the auxiliary crosslinking agent is 1.2%, the adding amount of the silane coupling agent is gamma-methacryloxypropyl trimethoxysilane, the adding amount of the silane coupling agent is 0.5%, the antioxidant is N, N' -1, 6-adipoyl bis (3, 5-bis (1, 1-dimethylethyl) -4-hydroxy-benzoyl, and the adding ratio is 0.05%;
the lower white EVA layer comprises: 75% of EVA resin with low melt index (melt index is 10g/10 min), 25% of EVA white master batch, wherein white inorganic particles are mixture of platy titanium dioxide, the addition amount of platy inorganic particles is 40%, the total addition amount of crosslinking agent is 0.8% of dicumyl peroxide and benzoyl peroxide (mass ratio=1:2), the total addition amount of auxiliary crosslinking agent is trimethylolpropane triacrylate, the total addition amount of auxiliary crosslinking agent is 1.2%, the addition amount of silane coupling agent is gamma-methacryloxypropyl trimethoxysilane, the addition amount of the auxiliary crosslinking agent is 0.5%, the antioxidant is N, N' -1, 6-adipoyl bis (3, 5-bis (1, 1-dimethylethyl) -4-hydroxy-benzoyl, and the addition ratio of the antioxidant is 0.05%;
respectively adding the transparent EVA layer resin and the white EVA resin mixture into material kettles of different extruders, controlling the extrusion temperature of a single screw to be 75 ℃, and controlling the rotating speed of a melt metering pump to be: transparent EVA is 8.0roll/min, white EVA is 8.0roll/min, the line speed of production is 10m/min, and the co-extrusion white light photovoltaic packaging adhesive film of A/B (transparent layer/white layer) is prepared through an extrusion casting machine. And controlling the rotation speeds of metering pumps of a transparent layer and a white layer host of the casting machine, so that the thickness of the transparent layer and the white film layer is 1:1.
Example 6
The upper transparent EVA layer comprises the following components: 70% of high-melt-index EVA resin (melt index is 28g/10 min), 30% of low-melt-index EVA resin (melt index is 10g/10 min), the cross-linking agent is dicumyl peroxide and benzoyl peroxide (mass ratio=1:2), the total addition amount of the cross-linking agent is 0.6%, the auxiliary cross-linking agent is trimethylolpropane triacrylate, the total addition amount of the auxiliary cross-linking agent is 1.5%, the silane coupling agent is gamma-methacryloxypropyl trimethoxysilane, the addition amount of the silane coupling agent is 0.5%, the antioxidant is N, N' -1, 6-adipoyl bis (3, 5-bis (1, 1-dimethylethyl) -4-hydroxy-benzoyl, and the addition ratio of the antioxidant is 0.05%;
the lower white EVA layer comprises: 80% of EVA resin with low melt index (melt index is 10g/10 min), 20% of EVA white master batch, wherein white inorganic particles are flaky barium sulfate, the addition amount of flaky inorganic particles is 40%, the total addition amount of crosslinking agent is 0.6% of dicumyl peroxide and benzoyl peroxide (mass ratio=1:2), the auxiliary crosslinking agent is trimethylolpropane triacrylate, the total addition amount of the auxiliary crosslinking agent is 1.5%, the silane coupling agent is gamma-methacryloxypropyl trimethoxysilane, the addition amount of the auxiliary crosslinking agent is 0.5%, the antioxidant is N, N' -1, 6-adipoyl bis (3, 5-bis (1, 1-dimethylethyl) -4-hydroxybenzoyl, and the addition ratio of the antioxidant is 0.05%;
respectively adding the transparent EVA layer resin and the white EVA resin mixture into material kettles of different extruders, controlling the extrusion temperature of a single screw to be 75 ℃, and controlling the rotating speed of a melt metering pump to be: transparent EVA is 7.0roll/min, white EVA is 7.0roll/min, the line speed of production is 10m/min, and the co-extrusion white light photovoltaic packaging adhesive film of A/B (transparent layer/white layer) is prepared through an extrusion casting machine. And controlling the rotation speeds of metering pumps of a transparent layer and a white layer host of the casting machine, so that the thickness of the transparent layer and the white film layer is 1:1.
Comparative example 1 used white inorganic particles which are conventional in the market at present, and example 1 selected
The same composite white inorganic particles and the same composite proportion can intuitively compare the performance difference between the adhesive film prepared in the embodiment 1 and the adhesive film prepared in the embodiment 1. The performance data of the composite adhesive films made by some of the other listed embodiments in the present disclosure are shown in table 1.
TABLE 1 Performance data for composite white films made in examples 1-6 and comparative example 1
a The hidden crack rate = number of hidden crack components/total number of laminate components, the number of laminate components is 1000cps.
As can be seen from the test results of the above examples and comparative examples, the high water blocking white co-extruded film prepared by the present invention has significantly lower water vapor permeability, and the water vapor permeability is not higher than 15.0 g/(m) 2 Day), or 14.0 g/(m) 2 Day), or 13.0 g/(m) 2 Day), indicating a significant increase in water blocking properties. By comparing the results of the water permeation tests of comparative example 1 and example 1, in which the content of the added inorganic particles was 10% (composite particle concentration. Masterbatch addition), the water vapor permeation rate value using the flaky inorganic particles was from 15.2 g/(m) 2 Day) was reduced to 9.7 g/(m) 2 Day), which increases the water blocking efficiency by about 40%; meanwhile, the structure formed by mutually stacking the flaky inorganic particles can increase the reflection of the white adhesive film on visible light, and the reflectivity of the embodiment 1 on the visible light is improved by 1.2 percent compared with that of the embodiment 1. In particular, examples 2-4 reflect the performance test data of co-extruded cast films prepared from other different inorganic composite particles, and the introduction of the flaky inorganic particles has a significant improvement in water vapor transmission rate. In addition, the battery hidden crack rate data of the composite white film prepared by the coextrusion mode is 0.3% -0.8% (without 0.8%), which are smaller than the hidden crack of the pure white EVA adhesive filmThe rate is 1.0-3.0%. Examples 5 to 6 use a single flaky white inorganic particle, which has water blocking properties superior to those of comparative example 1 using conventional TiO 2 And Mg (OH) 2 Is used for the water vapor barrier property of the glass.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. All equivalent changes and modifications made in accordance with the present invention are intended to be covered by the scope of the appended claims.
Claims (20)
1. A high water blocking (water vapor transmission rate 8.0-15.0 g/(m) for TOPCO 2 Day) white co-extruded photovoltaic film comprising an upper transparent EVA layer and a lower white EVA layer,
wherein the transparent EVA layer contains: 70% -85% of EVA resin with high melt index, 15% -30% of EVA resin with low melt index, 0.3% -3% of cross-linking agent, 0.3% -3% of auxiliary cross-linking agent, 0.1% -2% of silane coupling agent and 0.05-0.5% of antioxidant;
the white EVA layer contains: 70-85% of EVA resin with low melt index, 15-30% of EVA white master batch, 0.3-3% of cross-linking agent, 0.3-2.5% of auxiliary cross-linking agent, 0.1-1.5% of silane coupling agent and 0.05-0.5% of antioxidant;
the EVA white master batch is 5-20 mu m flaky particles.
2. The white co-extruded high water blocking photovoltaic film according to claim 1, wherein the high melt index EVA resin has a melt index of not less than 16g/10min, or 20-28g/10min, and the low melt index EVA resin has a melt index of less than 16g/10min, or 5-15g/10min, and the melt temperature measured is 190 ℃ and the weight is 2.16kg.
3. The high water blocking white co-extruded photovoltaic film according to claim 1 or 2, wherein the content of the high melt index EVA resin in the transparent EVA layer is 72% -83%, or 75%, 78%, 80%.
4. The high water blocking white co-extruded photovoltaic film according to claim 1 or 2, wherein the content of the low melt EVA resin in the transparent EVA layer is 18% -28%, or 20%, 25%, 27%.
5. The high water blocking white co-extruded photovoltaic film according to claim 1 or 2, wherein the content of the low melt finger EVA resin in the white EVA layer is 72% -83%, or 75%, 78%, 80%.
6. The high water blocking white co-extruded photovoltaic film according to claim 1 or 2, characterized in that the EVA white master batch in the white EVA layer is 8-18 μm, or 10 μm, 15 μm.
7. The high water blocking white co-extruded photovoltaic film according to claim 1 or 2, wherein the EVA white master batch in the white EVA layer is inorganic particles, and the surface is subjected to surface modification treatment with organosilane, wherein the concentration of the inorganic particles is 20% -50%, or 25%, 30%, 35%, 40%, 45%.
8. The high water blocking white co-extruded photovoltaic film according to claim 1 or 2, wherein the EVA white master batch in the white EVA layer is one, two or more of the group consisting of platy magnesium hydroxide, platy magnesium oxide, platy titanium dioxide, platy aluminum oxide and platy barium sulfate.
9. The high water blocking white co-extruded photovoltaic film according to claim 1 or 2, wherein the cross-linking agent is one or more of dicumyl peroxide, tert-butyl peroxy 2-ethylhexyl carbonate, 1- (di-tert-butyl peroxide) -3, 5-trimethylcyclohexane and benzoyl peroxide.
10. The white co-extruded photovoltaic film according to claim 1 or 2, wherein the cross-linking agent is present in an amount of 0.5% -2.8%, or 0.8%, 1.0%, 1.5%, 2.0%, 2.5%.
11. The high water blocking white co-extruded photovoltaic film according to claim 1 or 2, wherein the co-crosslinking agent is one or more of triallyl isocyanurate, triallyl cyanurate, ethoxylated trimethylolpropane triacrylate, trimethylolpropane triacrylate and propoxylated glycerol triacrylate.
12. The white co-extruded photovoltaic film of claim 1 or 2, wherein the content of the co-crosslinking agent in the transparent EVA layer is 0.5% -2.8%, or 0.8%, 1.0%, 1.5%, 2.0%, 2.5%.
13. The high water blocking white co-extruded photovoltaic film according to claim 1 or 2, wherein the content of the co-crosslinking agent in the white EVA layer is 0.5% -2.3%, or 0.8%, 1.0%, 1.5%, 2.0%.
14. The high water blocking white co-extruded photovoltaic film according to claim 1 or 2, wherein the silane coupling agent is one or more of glycidoxypropyl trimethoxysilane, gamma-methacryloxypropyl trimethoxysilane, vinyl trimethoxysilane and vinyl-tris (2-methoxyethoxy) silane.
15. The white co-extruded photovoltaic film with high water blocking according to claim 1 or 2, wherein the content of the silane coupling agent in the transparent EVA layer is 0.2% -1.8%, or 0.3%, 0.5%, 0.8%, 1.0%, 1.5%.
16. Use of flaky particles in the high water blocking white co-extruded photovoltaic film of any of claims 1-15.
17. A preparation method of a high-water-resistance white co-extrusion photovoltaic adhesive film applied to a TOPCON single-glass assembly comprises the following preparation steps:
(1) Mixing high-melt EVA resin, low-melt EVA resin, cross-linking agent, auxiliary cross-linking agent, silane coupling agent and antioxidant to obtain transparent EVA layer resin mixture,
(2) Mixing EVA resin with low melt index, EVA white master batch, cross-linking agent, auxiliary cross-linking agent, silane coupling agent and antioxidant to obtain white EVA layer resin mixture,
(3) And respectively adding the transparent EVA layer resin mixture and the white EVA layer resin mixture into an extruder, controlling the extrusion temperature of a single screw to be 60-90 ℃, controlling the rotation speed of a melt metering pump to be 3-20roll/min, and preparing the co-extrusion white photovoltaic packaging adhesive film of the transparent layer A/white layer B by casting extrusion, wherein the production line speed is 2-40 m/min.
18. The method for preparing the high water-blocking white co-extrusion photovoltaic film according to claim 17, wherein the extrusion temperature is 65 ℃, 70 ℃, 75 ℃, 80 ℃ and 85 ℃.
19. The method for preparing the high-water-blocking white co-extrusion photovoltaic film according to claim 17, wherein the rotation speed of the melt metering pump is 5roll/min, 6roll/min, 9roll/min, 10roll/min and 15roll/min.
20. The application of the high water-blocking white co-extruded photovoltaic film prepared by the preparation method of the high water-blocking white co-extruded photovoltaic film of claims 1-15 or the high water-blocking white co-extruded photovoltaic film of claims 17-19 in TOPCON single glass assemblies.
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| CN202311704539.0A CN117683474A (en) | 2023-12-13 | 2023-12-13 | High-water-resistance white co-extrusion photovoltaic adhesive film applied to TOPCON (top of Con) single-glass assembly |
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| CN202311704539.0A CN117683474A (en) | 2023-12-13 | 2023-12-13 | High-water-resistance white co-extrusion photovoltaic adhesive film applied to TOPCON (top of Con) single-glass assembly |
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