CN117624687A - EB (electron beam) curing coating type photovoltaic backboard and preparation method thereof - Google Patents
EB (electron beam) curing coating type photovoltaic backboard and preparation method thereof Download PDFInfo
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- CN117624687A CN117624687A CN202311612641.8A CN202311612641A CN117624687A CN 117624687 A CN117624687 A CN 117624687A CN 202311612641 A CN202311612641 A CN 202311612641A CN 117624687 A CN117624687 A CN 117624687A
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- 238000000576 coating method Methods 0.000 title claims abstract description 107
- 239000011248 coating agent Substances 0.000 title claims abstract description 96
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 238000010894 electron beam technology Methods 0.000 title description 8
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims abstract description 50
- 239000000758 substrate Substances 0.000 claims abstract description 35
- 125000000524 functional group Chemical group 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 21
- 238000001227 electron beam curing Methods 0.000 claims abstract description 18
- -1 amino, hydroxyl Chemical group 0.000 claims abstract description 11
- 125000003396 thiol group Chemical group [H]S* 0.000 claims abstract description 5
- 239000011203 carbon fibre reinforced carbon Chemical group 0.000 claims abstract description 4
- 125000004185 ester group Chemical group 0.000 claims abstract description 4
- 238000001723 curing Methods 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 8
- 239000004698 Polyethylene Substances 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 4
- 238000003848 UV Light-Curing Methods 0.000 claims description 4
- 229920006267 polyester film Polymers 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 238000001029 thermal curing Methods 0.000 claims description 3
- 239000003607 modifier Substances 0.000 claims description 2
- 239000003973 paint Substances 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims 1
- 230000008023 solidification Effects 0.000 claims 1
- 239000010410 layer Substances 0.000 description 41
- 229920000139 polyethylene terephthalate Polymers 0.000 description 13
- 238000012360 testing method Methods 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 6
- 239000006087 Silane Coupling Agent Substances 0.000 description 5
- 239000002318 adhesion promoter Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 5
- 238000013007 heat curing Methods 0.000 description 5
- 239000002904 solvent Substances 0.000 description 4
- 229920002799 BoPET Polymers 0.000 description 3
- 239000008199 coating composition Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 235000010215 titanium dioxide Nutrition 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 238000003851 corona treatment Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
-
- H01L31/0481—
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- H01L31/049—
-
- H01L31/18—
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2427/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2427/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
-
- 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
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- Chemical & Material Sciences (AREA)
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- Manufacturing & Machinery (AREA)
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Abstract
The invention provides an EB curing coating type photovoltaic backboard and a preparation method thereof. The photovoltaic backboard comprises a first fluorocarbon coating, a first base coat, a base material, a second base coat and a second fluorocarbon coating which are sequentially stacked; the first primer layer and the second primer layer are coatings containing functional groups; the functional group is selected from any one or more of amino, hydroxyl, sulfhydryl, ester group or carbon-carbon double bond. According to the invention, the primer layer containing the functional groups is arranged between the fluorocarbon coating and the substrate, so that the binding force between the fluorocarbon coating and the substrate can be effectively improved, and the high-quality product rate is improved.
Description
Technical Field
The invention relates to the technical field of photovoltaic backboard preparation, in particular to an EB curing coating type photovoltaic backboard and a preparation method thereof.
Background
In recent years, with the continuous development of economy and society, the demand for electric power is increasing, and solar energy is increasingly widely used as a renewable, clean and pollution-free new energy source. At present, a solar cell is an important way for utilizing solar energy, and can directly convert light energy into electric energy, so that the electricity demand of people is met. Because solar cell is multiple semiconductor material constitution, PN junction and various coating film are easily influenced by adverse circumstances, in order to solve this problem, adopt photovoltaic module to encapsulate the protection to solar cell generally, encapsulate solar cell inside, form protection device, and isolated air and steam influence to promote solar cell's reliability.
The photovoltaic backboard is used as an outer layer material of the back surface of the photovoltaic module, is a key component of the photovoltaic module, isolates the inside of the module from the external environment, and enables the module to run outdoors for a long time. The reliability and service life of the assembly are also closely related to the quality of the back plate. At present, most of the photovoltaic back plates are coated photovoltaic back plates, which are mainly produced in a heat curing mode, and have the defects of large production occupation, high energy consumption and high investment cost. Meanwhile, in order to ensure leveling property and processability of the existing coating formula of the coating type photovoltaic backboard, a solvent is generally added into the coating formula, so that environmental pollution is caused in the subsequent drying process, and carbon emission is increased.
At present, electron beam curing (EB curing) is adopted to produce the photovoltaic backboard, and the photovoltaic backboard has the advantages of small occupied area of functional equipment, high energy utilization rate and low comprehensive cost. Compared with the solvent type heat curing mode in the prior art, no solvent is generated, and the storage and the treatment of the solvent are not needed, so that the pressure of enterprises can be greatly reduced.
The molecular chain of the PET substrate is in a straight chain configuration with the lowest energy conformation, and the molecular structure of the PET substrate has high symmetry and stability, so that excellent optical characteristics, easy forming, environmental aging resistance, chemical resistance and the like can be obtained. But correspondingly, the surface energy is low, so that the adhesion of the coating on PET is the focus of research. However, in practical development, the high-speed curing of the electron beam causes the shrinkage of the coating on the photovoltaic backsheet surface to be high, and the coating does not reach a degree of biting similar to that of the PET substrate. In addition, the fluorocarbon coating is mainly adopted in the coating type photovoltaic backboard, and the fluorine element is contained in the coating type photovoltaic backboard, so that the adhesion of the coating to the PET substrate becomes difficult. Therefore, the bonding force between the EB cured coating and PET is difficult to meet the requirements of relevant national standards and manufacturers.
At present, even in the mature heat curing process, corona treatment is usually required before the PET substrate leaves the factory, so that the groups on the surface of the PET substrate are increased, and the adhesion of the subsequent heat curing coating on the surface of the PET substrate is improved.
Disclosure of Invention
In view of the above, the present invention aims to provide an EB cured coated photovoltaic back sheet and a method for producing the same. The photovoltaic backboard is arranged between the fluorocarbon coating and the base material by adopting the base coating, so that the binding force between the fluorocarbon coating and the base material can be effectively improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a photovoltaic backboard, which comprises a first fluorocarbon coating, a first bottom coating, a base material, a second bottom coating and a second fluorocarbon coating which are sequentially stacked; the first primer layer and the second primer layer are coatings containing functional groups; the functional group is selected from any one or more of amino, hydroxyl, sulfhydryl, ester group or carbon-carbon double bond.
Preferably, the thickness of the first primer layer and the second primer layer is each independently 0 to 10 μm.
Preferably, the first fluorocarbon coating and the second fluorocarbon coating each independently have a thickness of 5 to 20 μm.
Preferably, the substrate is selected from any one of a polyester film, a polypropylene film, or a polyethylene film.
Preferably, the thickness of the substrate is 180 to 350 μm.
In a second aspect, the present invention provides a method for preparing the photovoltaic backboard, which includes the following steps:
s1: providing a substrate having a first primer layer and a second primer layer on upper and lower surfaces thereof, respectively;
s2: and (2) respectively coating fluorocarbon coating on the surfaces of the first base coat and the second base coat obtained in the step (S1), and curing to obtain the photovoltaic backboard.
Preferably, the first primer layer and the second primer layer are obtained after coating and curing, and the curing mode is selected from any one of UV curing, heat curing or EB curing.
Preferably, the first primer layer and the second primer layer are obtained by modifying a substrate with a modifying agent containing the functional group.
Preferably, the curing of step S2 is EB curing.
Preferably, the voltage of the EB curing is 90-150 keV, and the dosage is 30-100 kGy.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a photovoltaic backboard, which comprises a first fluorocarbon coating, a first base coating, a substrate, a second base coating and a second fluorocarbon coating which are sequentially laminated; the first primer layer and the second primer layer are coatings containing functional groups. According to the invention, the primer layer containing the functional groups is arranged between the fluorocarbon coating and the substrate, and the bonding force between the fluorocarbon coating and the substrate is effectively improved by forming chemical bonds with the primer layer through the fluorocarbon coating.
Through tests, the photovoltaic backboard provided by the invention has good appearance in a boiling-resistant 95 ℃ (24 h) experiment, has excellent performance in a cold-hot impact experiment and a constant wet heat treatment experiment, and has a PCT test of the backboard more than or equal to 48h (test standard reference: GB/T13034-2009).
Detailed Description
The technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Aiming at the problems that in the prior art, in the process of adopting electron beam curing, the binding force between a surface coating and a base material is low and the requirements of relevant national standards and manufacturers are difficult to meet, the invention provides an EB curing coating type photovoltaic backboard, which comprises a first fluorocarbon coating, a first base coating, a base material, a second base coating and a second fluorocarbon coating which are sequentially laminated.
In the present invention, the first primer layer and the second primer layer are functional group-containing coatings. The functional group is selected from any one or more of amino, hydroxyl, sulfhydryl, ester group or carbon-carbon double bond. The functional groups can form chemical bonds with the fluorocarbon surface coating, so that the adhesive force between the surface coating and the substrate is enhanced. In some embodiments of the present invention, it is preferable that the thickness of the first primer layer and the second primer layer is each independently 0 to 10 μm, not 0 μm, specifically 1 μm, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, or the like.
In the present invention, the first primer layer and the second primer layer may be formed on the upper and lower surfaces of the substrate by coating and curing, and the curing may be performed by any one of UV curing, thermal curing, and EB curing, and specific technical means may be performed according to methods well known to those skilled in the art. In some embodiments of the present invention, it is preferred that the coating of the silane coupling agent is performed by thermal curing and the coating of the adhesion promoter is performed by UV curing.
In some embodiments of the invention, the first primer layer and the second primer layer are obtained by modifying a substrate with a modifying agent containing the functional group. In the invention, the first fluorocarbon coating and the second fluorocarbon coating are obtained by coating and curing fluorocarbon coatings. The curing mode is preferably EB curing, the voltage of the EB curing is 90-150 kev, preferably 100-120 kev, and the dosage is 30-100 kGy, preferably 50-80 kGy. The fluorocarbon coating material of the present invention is not particularly limited, and may be any fluorocarbon coating material known to those skilled in the art. In some embodiments of the present invention, the fluorocarbon coating preferably comprises a fluorocarbon resin, which is a general commercial product. In actual preparation, a filler and an auxiliary agent can be added into the fluorocarbon coating according to the requirement, wherein the filler is selected from any one or more of titanium white powder, duPont 902, berli titanium white powder, gas silicon or boron nitride, and the auxiliary agent is selected from any one or more of a defoaming agent, a leveling agent, a wetting dispersing agent or a diluting agent. In some embodiments of the invention, the first and second fluorocarbon coatings preferably have a thickness of 5 to 20 μm, and may specifically be 5 μm, 7 μm, 9 μm, 10 μm, 12 μm, 14 μm, 15 μm, 16 μm, 18 μm, 20 μm, or the like.
In the present invention, the base material body may be selected from any one of a polyester film (PET film), a polypropylene film (PP film) and a polyethylene film (PE film). In some embodiments of the present invention, it is preferred to use a polyester film, i.e., a PET film, as a substrate. In the present invention, the thickness of the base material is 180 to 350. Mu.m, and may be 180 μm, 200 μm, 250 μm, 260 μm, 270 μm, 280 μm, 290 μm, 300 μm, 310 μm, 320 μm, 330 μm, 340 μm, 350 μm, or the like.
In the present invention, the thickness of the above-mentioned different coating layers refers generally to the thickness of the corresponding coating materials after curing and drying, except for the first primer layer and the second primer layer obtained by treating the substrate with the modifying agent.
In the present invention, the above-mentioned point values are only listed, but not limited thereto, and other point values within the numerical range are applicable, so that the present application will not be repeated in order to avoid complexity.
The invention also provides a preparation method of the photovoltaic backboard, which comprises the following steps:
s1: coating the coating containing the functional groups on the upper surface and the lower surface of a substrate, and curing to obtain the substrate with the first base coat and the second base coat on the surfaces;
or (b)
Modifying the upper and lower surfaces of the base material by adopting a modifier containing the functional group to obtain the base material with the first base coat and the second base coat on the surfaces;
s2: preparing the fluorocarbon coating related in the technical scheme;
and (2) respectively coating fluorocarbon coating on the surfaces of the first base coat and the second base coat obtained in the step (S1), and curing to obtain the photovoltaic backboard.
According to the present invention, a substrate having a first primer layer and a second primer layer on the surface is first prepared. As described above, the functional group-containing coating material can be obtained by coating the upper and lower surfaces of a substrate with the functional group-containing coating material and then curing the coating material. Wherein the functional group may be any one or more of amino, hydroxyl and mercapto, and in some embodiments of the present invention, the coating containing the functional group may be a silane coupling agent or an adhesion promoter, and the specific selection is well known to those skilled in the art and will not be described herein. The source of the silane coupling agent or adhesion promoter is not particularly limited, and the silane coupling agent or adhesion promoter may be generally commercially available. In other embodiments of the present invention, the modifying agent containing the functional group may be directly used to modify the upper and lower surfaces of the substrate.
Then, according to the present invention, the fluorocarbon coating according to the above technical scheme is prepared, and after the fluorocarbon coating is coated on the surfaces of the first primer layer and the second primer layer obtained in the step S1, respectively, the surfaces are cured, thereby obtaining the photovoltaic back sheet. The curing is preferably EB curing, and the energy and dosage of the curing are referred to in the above technical solutions, and will not be described herein.
The coating method in step S1 or step S2 is not particularly limited, and the thickness of the coating may be controlled by means known to those skilled in the art, such as dimple, mesh, or five-roll coating.
In the present invention, the thicknesses of the first and second undercoat layers may be different, and the thicknesses of the first and second fluorocarbon coatings may be different. Generally, in the practical application process, the thinner side of the corresponding fluorocarbon coating and the primer layer is used for the inner side of the photovoltaic module, and the thicker side is used for the outer side of the photovoltaic module and is in contact with the outside. .
Through tests, the photovoltaic backboard provided by the invention has good appearance in a boiling-resistant 95 ℃ (24 h) experiment, has excellent performance in a cold-hot impact experiment and a constant wet heat treatment experiment, and has a PCT test of the backboard more than or equal to 48h (test standard reference: GB/T13034-2009).
In order to further illustrate the present invention, the following examples are provided. The experimental materials used in the following examples of the present invention are all generally commercially available.
Example 1
The embodiment provides a photovoltaic backboard, which comprises a PET substrate, a first base coat and a first fluorocarbon coating, wherein the first base coat and the first fluorocarbon coating are sequentially stacked and distributed on the upper surface of the PET substrate, and a second base coat and the second fluorocarbon coating are sequentially stacked and distributed on the lower surface of the PET substrate. Wherein the first fluorocarbon coating has a thickness of 15 μm and the second fluorocarbon coating has a thickness of 3 μm; the thickness of the first primer layer is 3 μm, and the thickness of the second primer layer is 3 μm;
wherein, the paint formula of the first fluorocarbon coating and the second fluorocarbon coating is fluorocarbon resin sold in the market;
the preparation method of the photovoltaic backboard comprises the following steps:
a290 μm PET film was provided as a substrate, and after the PET substrate was treated with an adhesion pre-coating solution, a first primer layer and a second primer layer were formed on the upper and lower surfaces thereof. And weighing the raw materials according to the coating formula of the first fluorocarbon coating and the second fluorocarbon coating, coating the mixed materials on the surfaces of the first base coating and the second base coating, controlling the coating thickness, baking for 3min in an oven at 80 ℃, performing electron beam curing, wherein the voltage of the electron beam curing is 120keV, the dosage is 80kGy, and obtaining a photovoltaic backboard sample after curing is finished.
Example 2
This example provides a photovoltaic backsheet differing from example 1 only in that the first and second primer layers are thermally cured formed silane coupling agent coatings, the first and second primer layers each having a thickness of 3 μm;
the remaining parameters and steps remain the same as in example 1.
Example 3
This example provides a photovoltaic backsheet differing from example 1 only in that the first and second primer layers are adhesion promoter coatings formed by uv curing, the first and second primer layers each having a thickness of 3 μm;
the remaining parameters and steps remain the same as in example 1.
Comparative example 1
This comparative example provides a photovoltaic backsheet differing from example 1 only in that the first and second primer layers are not included, and the remaining parameters and steps remain the same as in example 1.
Performance testing
Some of the key performance tests were performed on the photovoltaic back sheets obtained in examples 1 to 3 and comparative example 1, and the test results are shown in table 1 below:
TABLE 1 part of key Performance test results
As can be seen from the data in table 1, the primer layer structure provided by the invention can improve the moisture and heat resistance (i.e. the adhesion) of the EB cured coated photovoltaic back sheet, and different group designs in the structure can also affect the moisture and heat resistance.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The EB curing coating type photovoltaic backboard is characterized by comprising a first fluorocarbon coating, a first base coating, a base material, a second base coating and a second fluorocarbon coating which are sequentially laminated;
the first primer layer and the second primer layer are coatings containing functional groups;
the functional group is selected from any one or more of amino, hydroxyl, sulfhydryl, ester group or carbon-carbon double bond.
2. The EB cured coated photovoltaic backsheet of claim 1, wherein the first and second primer layers each independently have a thickness of 0 to 10 μm;
the first fluorocarbon coating and the second fluorocarbon coating each independently have a thickness of 5 to 20 μm.
3. The EB cured coated photovoltaic backsheet according to claim 1 or 2, wherein the substrate is selected from any one of polyester film, polypropylene film or polyethylene film.
4. The EB cured coated photovoltaic backsheet according to claim 3, wherein the thickness of the substrate is 180 to 350 μm.
5. A method for producing the EB cured coated photovoltaic back sheet as described in any one of claims 1 to 4, comprising the steps of:
s1: providing a substrate having a first primer layer and a second primer layer on upper and lower surfaces thereof, respectively;
s2: and (2) respectively coating fluorocarbon coating on the surfaces of the first base coat and the second base coat obtained in the step (S1), and curing to obtain the photovoltaic backboard.
6. The method according to claim 5, wherein the first primer layer and the second primer layer are obtained by coating and curing a paint;
the curing mode is selected from any one of UV curing, thermal curing or EB curing.
7. The method according to claim 5, wherein the first primer layer and the second primer layer are obtained by modifying a substrate with a modifier containing the functional group.
8. The method of claim 5, wherein the curing in step S2 is EB curing;
the voltage of the EB solidification is 90-150 kev, and the dosage is 30-100 kGy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311612641.8A CN117624687A (en) | 2023-11-29 | 2023-11-29 | EB (electron beam) curing coating type photovoltaic backboard and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311612641.8A CN117624687A (en) | 2023-11-29 | 2023-11-29 | EB (electron beam) curing coating type photovoltaic backboard and preparation method thereof |
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| CN117624687A true CN117624687A (en) | 2024-03-01 |
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| CN202311612641.8A Pending CN117624687A (en) | 2023-11-29 | 2023-11-29 | EB (electron beam) curing coating type photovoltaic backboard and preparation method thereof |
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| Country | Link |
|---|---|
| CN (1) | CN117624687A (en) |
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2023
- 2023-11-29 CN CN202311612641.8A patent/CN117624687A/en active Pending
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