CN112226120A - Fluorocarbon coating liquid, UV-resistant transparent fluorocarbon coating and transparent solar cell back panel comprising same - Google Patents

Fluorocarbon coating liquid, UV-resistant transparent fluorocarbon coating and transparent solar cell back panel comprising same Download PDF

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Publication number
CN112226120A
CN112226120A CN202010147093.6A CN202010147093A CN112226120A CN 112226120 A CN112226120 A CN 112226120A CN 202010147093 A CN202010147093 A CN 202010147093A CN 112226120 A CN112226120 A CN 112226120A
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fluorocarbon
fluorocarbon coating
coating liquid
resin
percent
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张彦
汪诚
简伟任
冯金刚
邓文辉
薛永富
唐海江
李刚
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Ningbo Exciton Technology Co Ltd
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Ningbo Exciton Technology Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • 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
    • C09D127/18—Homopolymers or copolymers of tetrafluoroethene
    • 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/65—Additives macromolecular
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • H01L31/049—Protective back sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/20—Applications use in electrical or conductive gadgets
    • C08L2203/204—Applications use in electrical or conductive gadgets use in solar cells
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • 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 relates to the technical field of solar back plates, in particular to a fluorocarbon coating liquid, a UV-resistant transparent fluorocarbon coating and a transparent solar cell back plate comprising the coating. In order to solve the problem of poor light transmittance of the traditional white photovoltaic back plate, the invention provides a fluorocarbon coating liquid, a UV-resistant transparent fluorocarbon coating and a transparent solar cell back plate comprising the coating. The fluorocarbon coating liquid comprises 55-80% of fluorocarbon resin, 1-2% of UV absorbent, 1-5% of matting powder, 0.3-0.8% of polyacrylate, 10-20% of adhesion promoting resin and 5-20% of isocyanate; the total amount of the fluorocarbon resin, the UV absorbent, the matting powder, the polyacrylate, the adhesion promoting resin and the isocyanate is 100 percent. The UV-resistant transparent fluorocarbon coating is formed after the fluorocarbon coating liquid is cured, the transparent solar cell back plate comprising the coating has the characteristics of high light transmittance and ultraviolet resistance, can be applied to a double-sided cell assembly, improves the power generation efficiency of the cell assembly, and can be used outdoors for a long time.

Description

Fluorocarbon coating liquid, UV-resistant transparent fluorocarbon coating and transparent solar cell back panel comprising same
Technical Field
The invention relates to the technical field of solar back plates, in particular to a fluorocarbon coating liquid, a UV-resistant transparent fluorocarbon coating and a transparent solar cell back plate comprising the coating.
Background
At present, solar cells (also called photovoltaic cells or photovoltaic modules) are used and developed unprecedentedly, and the core problem of the current photovoltaic modules is to improve the power generation efficiency of the photovoltaic cells. And through two-sided electricity generation battery piece technique, can effectively promote the utilization of two-sided light, realize promoting by a wide margin of photovoltaic module generating efficiency. For the photovoltaic module of two-sided electricity generation, traditional white photovoltaic backplate can not be used because the light transmissivity is poor. Therefore, the development of a suitable transparent back plate with high transmittance can be applied to a double-sided battery assembly, and the long-term outdoor aging use is met, which is an important subject of the current photovoltaic back plate.
Disclosure of Invention
In order to solve the problem of poor light transmittance of the traditional white photovoltaic back plate, the invention provides a fluorocarbon coating liquid, a UV-resistant transparent fluorocarbon coating and a transparent solar cell back plate comprising the coating. The UV-resistant transparent fluorocarbon coating is formed after the fluorocarbon coating liquid is cured, the transparent fluorocarbon coating is high in light transmittance, and the problem of poor light transmittance of the traditional white photovoltaic back plate is solved. The transparent solar cell backboard comprising the coating has the characteristics of high light transmittance and Ultraviolet (UV) resistance, can be applied to a double-sided cell module, improves the power generation efficiency of the cell module, and can be used outdoors for a long time.
The high light transmittance of the transparent back plate means that all materials have the characteristic of transparency. Compared with the common fluorocarbon coating, the transparent fluorocarbon coating is used as an inner layer packaging layer, and a proper UV absorbent is required to be selected to replace the original titanium dioxide, so that the ultraviolet resistance is realized, and the coating is transparent. Therefore, the UV-resistant transparent fluorocarbon coating is selected and developed, and the method has important significance for the transparent photovoltaic back plate and even the double-sided power generation assembly.
In order to achieve the purpose, the invention adopts the following technical scheme:
the fluorocarbon coating liquid comprises, by weight, 55-80% of fluorocarbon resin, 1-2% of UV absorbent, 1-5% of matting powder, 0.3-0.8% of polyacrylate, 10-20% of adhesion promoting resin and 5-20% of isocyanate; the total amount of the fluorocarbon resin, the UV absorbent, the matting powder, the polyacrylate, the adhesion promoting resin and the isocyanate is 100 percent.
Dispersing the fluorocarbon resin, the UV absorbent, the matting powder, the polyacrylate, the adhesion promoting resin and the isocyanate in an organic solvent to form the fluorocarbon coating liquid.
The solid content of the fluorocarbon coating liquid is 40-60%. All percentages stated in this application are percentages by weight.
The fluorocarbon coating liquid is also called fluorocarbon coating.
The components in the fluorocarbon coating liquid are limited within the content range, so that the fluorocarbon resin can initially react at high temperature, and then is cured at 50 ℃ for 48 hours to form a high-density transparent fluorocarbon coating on the surface of the PET substrate, the transparent fluorocarbon coating can show excellent packaging strength in the lamination process with EVA, the high packaging strength can be still maintained after the transparent fluorocarbon coating is subjected to a damp-heat aging test, and appearance change is avoided after QUV treatment.
The proportion of the fluorocarbon coating liquid is limited in the range, and the fluorocarbon coating and the corresponding UV-resistant characteristic of the solar backboard after curing are better controlled, so that the final solar backboard product can meet the quality requirement of the transparent photovoltaic module (the transmittance of the current transparent backboard is required to be more than 85%, and the UV-resistant index is 120kwh/m2The appearance is not obviously changed. Appearance defects (the adhesion test result shows that the fluorocarbon coating does not fall off) do not occur after 2000h of high-temperature high-humidity test, and the packaging strength is more than 20N. The above tests are all simulated outdoor 25-year service conditions).
Further, the solid content of the fluorocarbon coating liquid is preferably 45% to 55%.
The solid content of the fluorocarbon coating liquid is limited in the range, so that the fluorocarbon coating liquid can be uniformly coated on the surface of the base material.
Further, the fluorocarbon resin is selected from one or a combination of at least two of polyvinylidene fluoride, polyvinyl fluoride, polytetrafluoroethylene, polychlorotrifluoroethylene and polyhexafluoropropylene.
The fluorocarbon resin can realize the characteristic of weather resistance (ultraviolet resistance) by utilizing the characteristic of high bond energy of fluorine-carbon bonds.
Further, the fluorocarbon resin is a thermosetting resin.
The fluorocarbon resin is provided by a bulk metalworking.
Further, the UV absorber is a triazine-based UV absorber, and has excellent performance in UV resistance. Triazine UV absorbent takes triazine ring as main body, one of three substituent groups is ortho-hydroxyl substituted phenyl group, so that the triazine UV absorbent has the advantages of high efficiency, low color, high processing temperature, good compatibility and the like, and is suitable for being used in transparent systems.
Further, the UV absorber is a triazine UV absorber provided by basf, germany.
Further, the matting powder is silica particles.
Further, the silica particles are provided by Graves corporation.
Further, the added polyacrylate is used for modifying the fluorocarbon resin.
The polyacrylate type is mainly used for regulating and controlling the bonding force of the fluorocarbon coating after weather resistance.
The polyacrylate is available from Pickering chemistry.
Furthermore, the adhesion promoting resin is thermoplastic polyurethane resin, and can further participate in reaction bonding with the EVA surface in the high-temperature lamination process to form high packaging strength.
The thermoplastic polyurethane resin is provided by Daba chemistry.
Further, the curing agent is of the isocyanate type.
Further, the isocyanate is selected from one or a combination of at least two of toluene diisocyanate trimer or polymer, hexamethylene diisocyanate trimer or polymer, or isophorone diisocyanate trimer or polymer.
Further, the isocyanate is available from bayer corporation.
The organic solvent is selected from one or the combination of at least two of ethyl acetate, butyl acetate, butanone and cyclohexanone.
Further, the fluorocarbon coating liquid comprises 58% -70% of fluorocarbon resin, 1% -2% of UV absorbent, 3% -5% of matting powder, 0.4% -0.8% of polyacrylate, 10% -16.4% of adhesion promoting resin and 12.2% -19% of isocyanate; the total amount of the fluorocarbon resin, the UV absorbent, the matting powder, the polyacrylate, the adhesion promoting resin and the isocyanate is 100 percent. The solid content of the fluorocarbon coating liquid is controlled to be 43% -55%, and the technical scheme comprises the following steps of 1, 4-5 and 7-8.
Further, the paint comprises 65-70% of fluorocarbon resin, 1-1.3% of UV absorbent, 3-4% of matting powder, 0.4-0.5% of polyacrylate, 13-14% of adhesion promoting resin and 12.2-15.6% of isocyanate in percentage by weight; the total amount of the fluorocarbon resin, the UV absorbent, the matting powder, the polyacrylate, the adhesion promoting resin and the isocyanate is 100 percent. The solid content of the fluorocarbon coating liquid is controlled to be 48-55%, and the technical scheme comprises the embodiments 1, 4 and 5.
By limiting the fluorocarbon coating formulation to the preferred parameters, the coating can be guaranteed to have high UV blocking performance and still maintain high package strength after humid heat aging.
The invention also provides a transparent fluorocarbon coating (also called fluorocarbon layer), which is formed by curing the fluorocarbon coating liquid.
The invention also provides a solar cell backboard (solar backboard for short), which sequentially comprises a fluorocarbon coating, a base material, a bonding glue layer and a fluorine film layer. The fluorocarbon coating is formed by curing the fluorocarbon coating liquid. The solar cell back plate is a transparent solar cell back plate.
The fluorocarbon coating comprises fluorocarbon resin, UV absorbent, matting powder, polyacrylate, thermoplastic polyurethane resin and isocyanate.
Further, the substrate (also referred to as a substrate layer) is a transparent substrate, and the material of the substrate layer is selected from poly (p-xylylene glycol) (PET).
Furthermore, the adhesive layer is formed by an adhesive, and the adhesive is a polyester adhesive.
Further, the fluorine membrane is selected from a transparent PVF membrane or a PVDF membrane.
Further, the thickness of the fluorocarbon coating is 10-25 μm; the thickness of the base material layer is 250-300 mu m; the thickness of the adhesive layer is 6-10 mu m; the thickness of the fluorine film layer is 20-25 μm.
Furthermore, the thickness of the adhesive layer is 6-8 μm.
Furthermore, the thickness of the base material layer is 275-300 mu m.
Furthermore, the thickness of the fluorocarbon coating is preferably 15-20 μm.
Further, the thickness of the fluorocarbon coating is preferably 15-17 μm.
The transparent solar backboard provided by the invention can be used as an outermost backboard packaging material of a photovoltaic module.
The preparation method of the solar backboard provided by the invention comprises the following steps:
coating the fluorocarbon layer coating liquid on the surface of a base material, and placing the base material in a circulating oven for thermosetting treatment to form a fluorocarbon coating; then coating a bonding adhesive layer on the other surface of the substrate, placing the substrate in a circulating oven for drying, and bonding a fluorine film layer; finally, carrying out primary curing reaction.
Further, the temperature of the circulating oven drying is 150 ℃ and the time is 2 minutes.
Furthermore, the drying temperature of the adhesive layer is 90 ℃ and the time is 2 minutes.
Further, the aging reaction temperature was 50 ℃ and the time was 48 hours.
Further, the substrate was a model KP20 substrate available from Ningbering corporation. The substrate is also referred to as a PET substrate.
The coating process, the thermal curing process, and the bonding process can be set according to the prior art.
The above preparation method further comprises a step of preparing the fluorocarbon coating liquid before coating the fluorocarbon coating liquid on the surface of the substrate.
The fluorocarbon resin and the UV absorbent in the fluorocarbon layer coating liquid have important influence on ultraviolet aging property and wet heat aging property, and the added adhesion promoter (namely the adhesion promoter resin) thermoplastic polyurethane can further enhance the bonding capacity with EVA in the lamination high-temperature process.
The fluorocarbon coating liquid provided by the invention realizes the following technical effects:
1. after the fluorocarbon coating liquid is solidified into the fluorocarbon coating, the solar backboard inner layer material with aging resistance and high packaging strength can be realized.
2. After the fluorocarbon coating liquid is solidified into the fluorocarbon coating, the fluorocarbon coating liquid is bonded with a proper fluorine film to obtain the solar backboard, and the solar backboard can realize the characteristics of high transmittance, good ultraviolet resistance and high weather resistance.
The UV-resistant transparent fluorocarbon coating is formed after the fluorocarbon coating liquid is cured, the transparent solar cell back plate comprising the coating has the characteristics of high light transmittance and Ultraviolet (UV) resistance, can be applied to a double-sided cell assembly, improves the power generation efficiency of the cell assembly, and can be used outdoors for a long time.
Drawings
Fig. 1 is a schematic structural diagram of a solar back sheet provided by the present invention.
Wherein the above figures include the following reference numerals:
10. a fluorine film layer; 20. gluing a glue layer; 30. a substrate layer; 40. a fluorocarbon coating.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The preparation method of the solar back panel film provided by the embodiment of the invention comprises the following steps:
(1) coating the fluorocarbon coating liquid on the surface of a base material, and placing the base material in a circulating oven for curing treatment to form a fluorocarbon coating; (2) coating an adhesive on the other side of the semi-finished product substrate coated with the fluorocarbon coating to form a bonding adhesive layer, placing the bonding adhesive layer in a circulating oven for drying treatment, and then compounding a fluorine film layer; (3) curing and reacting the solar backboard finished product; (4) and laminating the solar backboard and the EVA to prepare a simulation test packaging strength.
Further, (1) the temperature of the drying of a circulating oven for fluorocarbon coating treatment in the process is 150 ℃, and the time is 2 minutes;
further, (2) the temperature of a circulating oven for drying the adhesive in the process is 90 ℃, and the time is 2 minutes;
further, the aging treatment temperature in the process (3) was 50 ℃ for 48 hours.
Further, the lamination parameters of the (4) process are suggested to be a temperature of 145 ℃, evacuation for 6 minutes, deflation for 30 seconds, lamination pressure of 0.1MPa, and lamination for 12 minutes.
Further, the laminated EVA of choice is F806 supplied by foster.
Further, the substrate selected was a model KP20 substrate available from Ningbering corporation. The substrate is also referred to as a PET substrate.
The above preparation method further includes a step of disposing the fluorocarbon layer coating liquid before coating the fluorocarbon coating liquid on the surface of the substrate.
The solar backboard provided by the invention is subjected to the following tests:
the adhesive force of the fluorocarbon coating is as follows: the adhesion of the fluorocarbon coating to the substrate in the solar cell backsheet was tested according to the standard of GB 1720-1979 "paint adhesion test", wherein 100/100 represents no release and 90/100 represents 10% release.
Testing the packaging strength: according to the standard of GB/T31034-. Higher peel force indicates higher package strength.
QUV aging treatment: treating the silicon solar cell module by using an ultraviolet aging lamp according to the standard of GB/T31034-. The appearance is not obviously changed, and the UV resistance is qualified.
Light transmittance: the total light transmittance of the solar back sheet is tested according to the standard of JISK7105-1981, test method for plastic optical performance.
And (3) wet heat aging treatment: according to the standard of GB/T31034-. The smaller the reduction of the packaging strength, the better the resistance of the solar back sheet to wet heat aging.
The fluorocarbon coating liquid and fluorocarbon coating layer provided by the present invention will be further described with reference to the following examples.
The triazine-based UV absorber used in the examples was 2- (4, 6-diphenyl-1, 3, 5-triazine-2) -5-n-hexylalkoxyphenol.
Example 1
The preparation method of the fluorocarbon coating liquid provided by the embodiment comprises the following steps:
70 percent of polytetrafluoroethylene type fluorocarbon resin, 1.3 percent of triazine UV absorbent, 3 percent of silicon dioxide matting powder, 0.5 percent of polyacrylate, 13 percent of thermoplastic polyurethane resin and 12.2 percent of isocyanate. Dispersing the raw materials in an organic solvent to form a fluorocarbon coating liquid with the solid content of 50%. The polytetrafluoroethylene type fluorocarbon resin is provided by a Dacron chemical, the UV absorbent is provided by Pasteur, the matting powder is provided by Grace, the polyacrylate is provided by Pickle, the thermoplastic polyurethane resin is provided by Pozu, the isocyanate is provided by Bayer, and the organic solvent is butyl acetate.
The coating solution was coated on a 275 μm PET substrate.
The thickness of the fluorocarbon coating formed after curing was 16 μm.
The results of the performance tests of the fluorocarbon coatings obtained are shown in table 1.
Example 2
The preparation method of the fluorocarbon coating liquid provided by the embodiment comprises the following steps:
80 percent of polytetrafluoroethylene type fluorocarbon resin, 1 percent of triazine UV absorbent, 1.5 percent of matting powder silicon dioxide particles, 0.4 percent of polyacrylate, 12.1 percent of thermoplastic polyurethane resin and 5 percent of isocyanate. Dispersing the raw materials in an organic solvent to form the fluorocarbon coating liquid with the solid content of 40%. The polytetrafluoroethylene type fluorocarbon resin is provided by a Dacron chemical, the UV absorbent is provided by Pasteur, the matting powder is provided by Grace, the polyacrylate is provided by Pickering, the thermoplastic polyurethane resin is provided by Pozu, the isocyanate is provided by Bayer, and the organic solvent is butyl acetate.
The coating solution was coated on a 275 μm PET substrate.
The thickness of the fluorocarbon coating formed was 10 μm.
The results of the performance tests of the fluorocarbon coatings obtained are shown in table 1.
Example 3
The preparation method of the fluorocarbon coating liquid provided by the embodiment comprises the following steps:
60 percent of polytetrafluoroethylene type fluorocarbon resin, 1.4 percent of triazine UV absorbent, 1 percent of matting powder silicon dioxide particles, 0.6 percent of polyacrylate, 17 percent of thermoplastic polyurethane resin and 20 percent of isocyanate. The raw materials are dispersed in an organic solvent to form the fluorocarbon coating liquid with the solid content of 57%. The polytetrafluoroethylene type fluorocarbon resin is provided by a Dacron chemical, the UV absorbent is provided by Pasteur, the matting powder is provided by Grace, the polyacrylate is provided by Pickering, the thermoplastic polyurethane resin is provided by Pozu, the isocyanate is provided by Bayer, and the organic solvent is butyl acetate.
The coating solution was coated on a 250 μm PET substrate.
The thickness of the fluorocarbon coating formed was 18 μm.
The results of the performance tests of the fluorocarbon coatings obtained are shown in table 1.
Example 4
The preparation method of the fluorocarbon coating liquid provided by the embodiment comprises the following steps:
65 percent of polytetrafluoroethylene type fluorocarbon resin, 1.2 percent of triazine UV absorbent, 4 percent of matting powder silicon dioxide particles, 0.5 percent of polyacrylate additive, 14 percent of thermoplastic polyurethane resin and 15.3 percent of isocyanate. The raw materials are dispersed in an organic solvent to form the fluorocarbon coating liquid with the solid content of 48 percent. The polytetrafluoroethylene type fluorocarbon resin is provided by a Dacron chemical, the UV absorbent is provided by Pasteur, the matting powder is provided by Grace, the polyacrylate is provided by Pickering, the thermoplastic polyurethane resin is provided by Pozu, the isocyanate is provided by Bayer, and the organic solvent is butyl acetate.
The coating solution was coated on a 275 μm PET substrate.
The thickness of the fluorocarbon coating formed was 17 μm.
The results of the performance tests of the fluorocarbon coatings obtained are shown in table 1.
Example 5
The preparation method of the fluorocarbon coating liquid provided by the embodiment comprises the following steps:
67% of polytetrafluoroethylene type fluorocarbon resin, 1.0% of triazine UV absorbent, 3% of matting powder silica particles, 0.4% of polyacrylate, 13% of thermoplastic polyurethane resin and 15.6% of isocyanate. The raw materials are dispersed in an organic solvent to form the fluorocarbon coating liquid with the solid content of 55 percent. The polytetrafluoroethylene type fluorocarbon resin is provided by a Dacron chemical, the UV absorbent is provided by Pasteur, the matting powder is provided by Grace, the polyacrylate is provided by Pickering, the thermoplastic polyurethane resin is provided by Pozu, the isocyanate is provided by Bayer, and the organic solvent is butyl acetate.
The coating solution was coated on a 300 μm PET substrate.
The thickness of the fluorocarbon coating formed was 15 μm.
The results of the performance tests of the fluorocarbon coatings obtained are shown in table 1.
Example 6
The preparation method of the fluorocarbon coating liquid provided by the embodiment comprises the following steps:
55 percent of polytetrafluoroethylene type fluorocarbon resin, 1.8 percent of triazine UV absorbent, 4.5 percent of matting powder silicon dioxide particles, 0.3 percent of polyacrylate additive, 20 percent of thermoplastic polyurethane resin and 18.4 percent of isocyanate. The raw materials are dispersed in an organic solvent to form the fluorocarbon coating liquid with the solid content of 60 percent. The polytetrafluoroethylene type fluorocarbon resin is provided by a Dacron chemical, the UV absorbent is provided by Pasteur, the matting powder is provided by Grace, the polyacrylate is provided by Pickering, the thermoplastic polyurethane resin is provided by Pozu, the isocyanate is provided by Bayer, and the organic solvent is butyl acetate.
The coating solution was coated on a 300 μm PET substrate.
The thickness of the fluorocarbon coating formed was 25 μm.
The results of the performance tests of the fluorocarbon coatings obtained are shown in table 1.
Example 7
The preparation method of the fluorocarbon coating liquid provided by the embodiment comprises the following steps:
58 percent of polytetrafluoroethylene type fluorocarbon resin, 2 percent of triazine UV absorbent, 4.2 percent of matting powder silicon dioxide particles, 0.6 percent of polyacrylate, 16.4 percent of thermoplastic polyurethane resin and 18.8 percent of isocyanate. The raw materials are dispersed in an organic solvent to form the fluorocarbon coating liquid with the solid content of 43 percent. The polytetrafluoroethylene type fluorocarbon resin is provided by a Dacron chemical, the UV absorbent is provided by Pasteur, the matting powder is provided by Grace, the polyacrylate is provided by Pickering, the thermoplastic polyurethane resin is provided by Pozu, the isocyanate is provided by Bayer, and the organic solvent is butyl acetate.
The coating solution was coated on a 275 μm PET substrate.
The thickness of the fluorocarbon coating formed after curing was 20 μm.
The results of the performance tests of the fluorocarbon coatings obtained are shown in table 1.
Example 8
The preparation method of the fluorocarbon coating liquid provided by the embodiment comprises the following steps:
63.3 percent of polytetrafluoroethylene fluorocarbon resin, 1.9 percent of triazine UV absorbent, 5 percent of matting powder silicon dioxide particles, 0.8 percent of polyacrylate additive, 10 percent of thermoplastic polyurethane resin and 19 percent of isocyanate. The raw materials are dispersed in an organic solvent to form the fluorocarbon coating liquid with the solid content of 53 percent. The polytetrafluoroethylene type fluorocarbon resin is provided by a Dacron chemical, the UV absorbent is provided by Pasteur, the matting powder is provided by Grace, the polyacrylate is provided by Pickering, the thermoplastic polyurethane resin is provided by Pozu, the isocyanate is provided by Bayer, and the organic solvent is butyl acetate.
The coating solution was coated on a 275 μm PET substrate.
The thickness of the fluorocarbon coating formed was 16 μm.
The results of the performance tests of the fluorocarbon coatings obtained are shown in table 1.
Comparative example 1
The preparation method of the fluorocarbon coating liquid provided by the comparative example comprises the following steps:
70 percent of polytetrafluoroethylene fluorocarbon resin, 1.3 percent of benzotriazole UV absorbent, 3 percent of matting powder silicon dioxide particles, 0.5 percent of polyacrylate additive, 13 percent of thermoplastic polyurethane resin and 12.2 percent of isocyanate. Dispersing the raw materials in an organic solvent to form a fluorocarbon coating liquid with the solid content of 50%. The polytetrafluoroethylene type fluorocarbon resin is provided by a Dacron chemical, the UV absorbent is provided by Pasteur, the matting powder is provided by Grace, the polyacrylate is provided by Pickering, the thermoplastic polyurethane resin is provided by Pozu, the isocyanate is provided by Bayer, and the organic solvent is butyl acetate.
The coating solution was coated on a 275 μm PET substrate.
The thickness of the fluorocarbon coating formed was 16 μm.
The UV absorber in the fluorocarbon coating solution provided in comparative example 1 was a benzotriazole, and the performance test results of the resulting fluorocarbon coating are shown in table 1.
Comparative example 2
The preparation method of the fluorocarbon coating liquid provided by the comparative example comprises the following steps:
70 percent of polytetrafluoroethylene type fluorocarbon resin, 1.3 percent of benzophenone type UV absorbent, 3 percent of matting powder silicon dioxide particles, 0.5 percent of polyacrylate additive, 13 percent of thermoplastic polyurethane resin and 12.2 percent of isocyanate. Dispersing the raw materials in an organic solvent to form a fluorocarbon coating liquid with the solid content of 50%. The polytetrafluoroethylene type fluorocarbon resin is provided by a Dacron chemical, the UV absorbent is provided by Pasteur, the matting powder is provided by Grace, the polyacrylate is provided by Pickering, the thermoplastic polyurethane resin is provided by Pozu, the isocyanate is provided by Bayer, and the organic solvent is butyl acetate.
The coating solution was coated on a 275 μm PET substrate.
The thickness of the fluorocarbon coating formed was 16 μm.
The UV absorber in the fluorocarbon coating solution provided in comparative example 2 was benzophenone, and the performance test results of the resulting fluorocarbon coating are shown in table 1.
Comparative example 3
The preparation method of the fluorocarbon coating liquid provided by the embodiment comprises the following steps:
70 percent of polytetrafluoroethylene type fluorocarbon resin, 3 percent of matting powder silicon dioxide particles, 0.5 percent of polyacrylate, 13 percent of thermoplastic polyurethane resin and 13.5 percent of isocyanate. Dispersing the raw materials in an organic solvent to form a fluorocarbon coating liquid with the solid content of 50%. The polytetrafluoroethylene fluorocarbon resin is provided by a aurora chemical, the matting powder is provided by Grace Limited, the polyacrylate is provided by Pickering chemistry, the thermoplastic polyurethane resin is provided by Poa chemistry, the isocyanate is provided by Bayer, and the organic solvent is butyl acetate.
The coating solution was coated on a 275 μm PET substrate.
The thickness of the fluorocarbon coating formed was 16 μm.
The fluorocarbon coating liquid provided in comparative example 3 did not include a UV absorber, and the performance test results of the resulting fluorocarbon coating layer are shown in table 1.
The fluorocarbon coatings in examples 1 to 8 and comparative examples 1 to 3 were subjected to the following tests: the adhesion of the fluorocarbon coating to the substrate was tested according to the standard of GB 1720-1979 "paint adhesion test", wherein 100/100 represents no release and 90/100 represents 10% release. The total light transmittance of each fluorocarbon coating was measured according to the standard of JISK7105-1981, "method for measuring optical properties of plastics". The solar back sheet was tested for its packaging strength, resistance to wet heat aging and QUV change according to the standard of GB/T31034-.
Table 1 test results of fluorocarbon coatings in examples 1 to 8 and comparative examples 1 to 3
Figure BDA0002401144250000131
As can be seen from the comparative example tables, the kind and addition of UV absorbers have a very important influence on the UV resistance. When the UV absorbent adopts benzotriazoles and benzophenones, yellowing after QUV irradiation occurs, and the adhesive force under high humidity and heat conditions is obviously reduced. This indicates that benzotriazole-based, benzophenone-based UV absorbers are not inherently stable and are susceptible to cracking damage under aging conditions, resulting in a final reduction in coating performance. The formula added with the triazine absorbent can generally show the results that the appearance is not obviously changed and the adhesive force is not changed after 120 kwh.
The solar backboard provided by the invention has the characteristics of high transmittance (light transmittance) and ultraviolet resistance, and can ensure that the packaging strength meets the standard in the damp-heat aging test process. The fluorocarbon coatings provided by the embodiments 1, 4-5 and 7-8 have better performance, the fluorocarbon coatings do not fall off, the light transmittance exceeds 87.1%, the initial packaging strength is at least 85N/cm, no obvious appearance change exists after 120 kwh/square meter of QUV test, and the packaging strength is at least 48N/cm after high-humidity heat aging test. In particular, the fluorocarbon coatings provided in examples 1, 4, and 5 had the best performance, the fluorocarbon coatings did not fall off, the transmittance was over 87.6%, the initial package strength was at least 94N/cm, no significant appearance change was observed after QUV testing at 120 kwh/square meter, and the package strength was at least 56N/cm after high humidity heat aging testing.
The above are only preferred embodiments of the present invention, and are not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The fluorocarbon coating liquid is characterized in that raw materials of the fluorocarbon coating liquid comprise, by weight, 55% -80% of fluorocarbon resin, 1-2% of UV absorbent, 1% -5% of matting powder, 0.3% -0.8% of polyacrylate, 10% -20% of adhesion promoting resin and 5% -20% of isocyanate; the total amount of the fluorocarbon resin, the UV absorbent, the matting powder, the polyacrylate, the adhesion promoting resin and the isocyanate is 100 percent.
2. A fluorocarbon coating liquid as claimed in claim 1, wherein said fluorocarbon resin, UV absorber, matting powder, polyacrylate, adhesion promoting resin, and isocyanate are dispersed in an organic solvent to form a fluorocarbon coating liquid, and said fluorocarbon layer coating liquid has a solid content of 40 to 60%.
3. A fluorocarbon coating liquid as set forth in claim 1, wherein said fluorocarbon resin is selected from one or a combination of at least two of polyvinylidene fluoride, polyvinyl fluoride, polytetrafluoroethylene, polychlorotrifluoroethylene, or polyhexafluoropropylene.
4. A fluorocarbon coating liquid as set forth in claim 1 wherein said UV absorber is selected from triazine based UV absorbers.
5. A fluorocarbon coating liquid as set forth in claim 1 wherein said matting powder is silica particles.
6. A fluorocarbon coating according to claim 1, wherein said adhesion promoting resin is selected from thermoplastic polyurethane resins.
7. A fluorocarbon coating liquid as set forth in claim 1 wherein said isocyanate is selected from one or a combination of at least two of toluene diisocyanate trimer or multimer, hexamethylene diisocyanate trimer or multimer, or isophorone diisocyanate trimer or multimer.
8. A UV-resistant transparent fluorocarbon coating, characterized in that said fluorocarbon coating is formed from the fluorocarbon coating liquid according to any one of claims 1 to 7 after curing.
9. A transparent solar cell backboard is characterized by sequentially comprising a fluorocarbon coating, a polyethylene glycol terephthalate (PET) substrate, an adhesive layer and a fluorine film layer; the fluorocarbon coating is formed by curing the fluorocarbon coating liquid as set forth in any one of claims 1 to 7.
10. The solar cell backsheet according to claim 9, wherein the fluorocarbon coating layer has a thickness of 10 to 25 μm; the thickness of the base material is 250-300 mu m; the thickness of the adhesive layer is 6-10 mu m; the thickness of the fluorine film layer is 20-25 μm.
CN202010147093.6A 2019-07-15 2020-03-05 Fluorocarbon coating liquid, UV-resistant transparent fluorocarbon coating and transparent solar cell back panel comprising same Pending CN112226120A (en)

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CN113327996A (en) * 2021-05-27 2021-08-31 福斯特(嘉兴)新材料有限公司 Transparent backboard
CN115274901A (en) * 2022-07-18 2022-11-01 江苏中来新材科技有限公司 Up-conversion photovoltaic backboard and double-sided photovoltaic module
CN115274900A (en) * 2022-07-18 2022-11-01 江苏中来新材科技有限公司 Quantum dot photovoltaic backboard and double-sided photovoltaic assembly
CN116410635A (en) * 2021-12-29 2023-07-11 宁波激阳新能源有限公司 Fluorocarbon coating liquid, fluorocarbon coating and black solar backboard

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CN104201224A (en) * 2014-08-20 2014-12-10 杭州福斯特光伏材料股份有限公司 Transparent back plate for solar cell module
CN104409549A (en) * 2014-11-18 2015-03-11 苏州福斯特新材料有限公司 High-efficiency black solar cell backplane and preparation method thereof

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Publication number Priority date Publication date Assignee Title
CN113327996A (en) * 2021-05-27 2021-08-31 福斯特(嘉兴)新材料有限公司 Transparent backboard
CN116410635A (en) * 2021-12-29 2023-07-11 宁波激阳新能源有限公司 Fluorocarbon coating liquid, fluorocarbon coating and black solar backboard
CN115274901A (en) * 2022-07-18 2022-11-01 江苏中来新材科技有限公司 Up-conversion photovoltaic backboard and double-sided photovoltaic module
CN115274900A (en) * 2022-07-18 2022-11-01 江苏中来新材科技有限公司 Quantum dot photovoltaic backboard and double-sided photovoltaic assembly
CN115274901B (en) * 2022-07-18 2023-08-11 江苏中来新材科技有限公司 Up-conversion photovoltaic backboard and double-sided photovoltaic module
CN115274900B (en) * 2022-07-18 2023-08-11 江苏中来新材科技有限公司 Quantum dot photovoltaic backboard and double-sided photovoltaic module

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