CN109994566B - Solar back panel film and preparation method thereof - Google Patents
Solar back panel film and preparation method thereof Download PDFInfo
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- CN109994566B CN109994566B CN201711465788.3A CN201711465788A CN109994566B CN 109994566 B CN109994566 B CN 109994566B CN 201711465788 A CN201711465788 A CN 201711465788A CN 109994566 B CN109994566 B CN 109994566B
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- 238000001125 extrusion Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 18
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 16
- 239000011737 fluorine Substances 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims abstract description 16
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 33
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 33
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 33
- -1 polyethylene Polymers 0.000 claims description 28
- 239000003795 chemical substances by application Substances 0.000 claims description 26
- 239000002105 nanoparticle Substances 0.000 claims description 20
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 14
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 14
- 235000012239 silicon dioxide Nutrition 0.000 claims description 13
- 230000000655 anti-hydrolysis Effects 0.000 claims description 10
- 239000004698 Polyethylene Substances 0.000 claims description 9
- 239000000377 silicon dioxide Substances 0.000 claims description 9
- 239000005543 nano-size silicon particle Substances 0.000 claims description 8
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- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 claims description 7
- 229920001707 polybutylene terephthalate Polymers 0.000 claims description 7
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- 239000000203 mixture Substances 0.000 claims description 4
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- 230000000996 additive effect Effects 0.000 claims description 2
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- 150000001565 benzotriazoles Chemical class 0.000 claims description 2
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- 229920001155 polypropylene Polymers 0.000 claims 1
- 150000003873 salicylate salts Chemical class 0.000 claims 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims 1
- 239000010410 layer Substances 0.000 description 140
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 11
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- 238000010248 power generation Methods 0.000 description 2
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- 229960001860 salicylate Drugs 0.000 description 2
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- 238000004381 surface treatment Methods 0.000 description 2
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical class C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 description 1
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- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 1
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 1
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- 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
- H01L31/0481—Encapsulation of modules characterised by the composition of the encapsulation material
-
- 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
-
- 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
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
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- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Photovoltaic Devices (AREA)
- Laminated Bodies (AREA)
Abstract
The invention provides a solar back panel film which is of a multilayer structure and comprises a first layer, a second layer and a third layer, wherein the first layer and the third layer are positioned on two sides of the second layer, the components of the first layer and the third layer do not contain fluorine resin and an anti-ultraviolet auxiliary agent, and the multilayer structure is prepared through a multilayer co-extrusion process, so that the solar back panel film has good weather resistance, can protect the environment and is simple in preparation process.
Description
Technical Field
The invention relates to the field of solar modules, in particular to a solar backboard film and a preparation method thereof.
Background
Solar energy is an environment-friendly and inexhaustible energy source, and is the best choice for replacing the traditional thermal power generation. The solar cell device, which is the most important component of the solar module, is often installed outdoors, and the problems of product aging, low power generation efficiency and the like caused by high temperature, ultraviolet rays, wind and rain and the like often occur. The solar cell back plate can be used as a protective film to wrap the inner side of the solar cell, and the service life of the solar cell is greatly prolonged.
Because the solar back plate film is positioned on the back surface of the solar cell panel, the solar back plate film plays a role in supporting and protecting the cell, and the back plate film is required to have reliable insulativity, water vapor barrier property and ageing resistance. The solar back panel film in China mostly uses fluorine-containing polymer back panels, such as KPK, KPE or KPF multilayer composite structures, wherein a K layer is a fluorine-containing layer playing a role in resisting ultraviolet rays, and because the polymer contains halogen elements, fluorine pollution is easily caused after components are scrapped, and the method relates to multiple steps such as laminating and the like and has a complicated process.
Disclosure of Invention
In view of the above, it is necessary to provide a fluorine-free solar back sheet film having good weather resistance and simple production process.
The invention provides a solar back panel film which has a multilayer structure and comprises a first layer, a second layer and a third layer, wherein the first layer and the third layer are positioned on two sides of the second layer, and the components of the first layer and the third layer do not contain fluorine resin and an anti-ultraviolet auxiliary agent; the multilayer structure is prepared by a multilayer co-extrusion process.
Further, the components of the first layer and the third layer comprise: 82-90% of fluororesin-free and 1-8% of anti-ultraviolet auxiliary agent.
Furthermore, the anti-ultraviolet auxiliary agent is at least one of salicylic acid esters, benzophenones, benzotriazoles, substituted acrylonitrile and triazines.
Further, the components of the second layer comprise 85-91.5% by mass of non-fluorine resin and 1.5-5% by mass of hydrolysis resistant agent.
Further, the fluorine-free resin of the first layer and the second layer is polyester resin, and the polyester resin comprises at least one of polyethylene terephthalate, polybutylene terephthalate and polyethylene naphthalate.
Further, the non-fluorine resin of the third layer includes a first resin and a second resin, the first resin is at least one of polyethylene, polypropylene and ethylene-vinyl acetate copolymer, and the second resin is at least one of polyethylene terephthalate, polybutylene terephthalate and polyethylene naphthalate.
Further, the mass percent of the first resin is 13-83%, and the mass percent of the second resin is 15-82%.
Further, at least one layer of the multilayer structure is added with inorganic nanoparticles, and the mass percentage of the inorganic nanoparticles is 5-10%.
Further, the inorganic nanoparticles of the first layer and the third layer are at least one of nano silicon dioxide, nano titanium dioxide, nano barium sulfate and nano aluminum oxide;
further, the inorganic nanoparticles of the second layer are at least one of nano montmorillonite, nano silica, nano mica sheet or nano titanium nitride.
The invention also provides a preparation method of the solar back panel film, which is characterized by comprising the following steps:
preparing and forming a first layer, a second layer and a third layer by a three-layer co-extrusion process;
wherein the first layer and the third layer are added with an anti-ultraviolet auxiliary agent.
The solar backboard film has the advantages that:
according to the solar back plate film, the ultraviolet-resistant auxiliary agents are added into the fluorine-free resins of the first layer and the third layer, the first layer and the third layer provide ultraviolet resistance, and the back plate film with good weather resistance can be obtained through a multi-layer co-extrusion process. Compared with the solar back plate film which contains fluorine and relates to a multilayer laminating process in the prior art, the solar back plate film disclosed by the invention has good weather resistance, can protect the environment and is simple in preparation process.
According to the solar backboard film, the multiple resins with different proportions are added into the base material of the third layer, so that the solar backboard film has good bonding property with EVA (ethylene vinyl acetate) glue after being assembled, the stripping difficulty is improved, and the bonding property is good.
Drawings
FIG. 1 is a schematic structural view of a solar back sheet film according to the present invention;
wherein 11 is a second layer, 12 is a first layer, 13 is a third layer, and 14 is inorganic nanoparticles.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the solar back sheet film provided by the invention is a multilayer structure, and specifically may include a first layer 12, a second layer 11, and a third layer 13, wherein the first layer 12 and the third layer 13 are located on both sides of the second layer 11, the first layer 12 and the third layer 13 include components that do not contain a fluororesin and an anti-uv additive, and the multilayer structure is prepared by a multilayer co-extrusion process.
According to the solar backboard film, the ultraviolet-resistant auxiliary agent is added into the fluorine-free resin of the first layer and the second layer, and the backboard film with good weather resistance can be obtained through a multilayer co-extrusion process.
Further, the total thickness of the solar back panel film is 0.125mm-0.350mm, and preferably, the total thickness of the solar back panel film is 0.25mm-0.3 mm.
Further, the thickness of the first layer 12 is 0.010mm to 0.050mm, the thickness of the second layer 11 is 0.105mm to 0.250mm, and the thickness of the third layer 13 is 0.010mm to 0.050 mm. According to the solar backboard film, the thickness proportion of each layer is reasonably set, and the optimal comprehensive performance can be obtained by cooperating with each layer structure of the solar backboard film.
Further, the mass percent of the fluororesin-free first layer 12 is 82% -90%, and the mass percent of the anti-ultraviolet auxiliary agent is 1% -8%. Too high a content of the anti-UV auxiliary is disadvantageous in film formation, and too low a content is inferior in weather resistance. The proportion of the resin matrix and the anti-ultraviolet auxiliary agent can ensure the comprehensive performances of good formability and the like of the solar backboard film, and can ensure the solar backboard film to have excellent weather resistance. The non-fluorine resin may be a polyester resin, specifically may be at least one selected from polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate, and is preferably polyethylene terephthalate. The ultraviolet resistant auxiliary agent is at least one of salicylate, benzophenone, benzotriazole, substituted acrylonitrile and triazine, and is preferably salicylate.
Further, in order to improve the weather resistance of the solar back sheet film, the composition of the second layer 11 includes no fluorine resin and hydrolysis resistance agent. The second layer 11 does not contain fluororesin, and the mass percent of the fluororesin is 85-91.5%, and the mass percent of the hydrolysis resistant agent is 1.5-5%. By adding a certain amount of hydrolysis resistant agent in the second layer, the backboard film has good weather resistance and can be widely applied to a humid environment.
The fluororesin in the second layer 11 may be a polyester resin, and may be at least one selected from polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate, and polyethylene terephthalate is preferred. The anti-hydrolysis agent can be at least one of epoxy polymer anti-hydrolysis agent, isocyanate polymer anti-hydrolysis agent or amide polymer anti-hydrolysis agent, and preferably is amide polymer anti-hydrolysis agent. Specifically, the hydrolysis-resistant agent may be at least one of carbodiimide and polycarbodiimide.
Further, in order to improve the weather resistance of the solar back sheet film as a whole, the third layer 13 and the first layer 12 also have excellent weather resistance, and the components may specifically include no fluorine resin and an ultraviolet resistance auxiliary agent. The mass percent of the fluorine-free resin is 82-90%, and the mass percent of the anti-ultraviolet auxiliary agent is 1-8%.
Further, in order to ensure the peeling force of the solar back sheet film after the lamination, the non-fluorine resin of the third layer 13 may specifically include the first resin and the second resin. The first resin may include at least one of polyethylene, polypropylene, ethylene-vinyl acetate copolymer, preferably polyethylene. The second resin is polyester resin, and can be selected from at least one of polyethylene terephthalate, polybutylene terephthalate and polyethylene naphthalate. Because the base material of the third layer comprises the first resin and the second resin, the solar back panel film and the solar cell have good bonding performance, and the stripping force is obviously improved after the solar back panel film is laminated with EVA and glass. In order to ensure the strength of the peeling force, the mass percent of the first resin in the second layer is 13-83%, and the mass percent of the second resin in the second layer is 15-82%.
Furthermore, inorganic nanoparticles 14 are added into at least one layer of the solar back panel film, and the particle size of the inorganic nanoparticles 14 is 0.2-0.6 μm. Referring to fig. 1, it is preferable that inorganic nanoparticles 14 are added to each of the first layer 12, the second layer 11, and the third layer 13. In order to prevent the solar backboard film from being too high in viscosity, inorganic nanoparticles are added into the first layer, and the inorganic nanoparticles are at least one of nano silicon dioxide, nano titanium dioxide, nano barium sulfate and nano aluminum oxide. In order to reduce the transparency of the solar back panel film and improve the reflectivity, inorganic nanoparticles are added in the second layer, and the inorganic nanoparticles are at least one of nano montmorillonite, nano silica, nano mica sheets or nano titanium nitride.
Further, the inorganic nanoparticles may be surface-treated. The surface treatment can reduce the photochemical activity of the inorganic nanoparticles and improve the dispersibility of the inorganic particles in the polyester resin, so that the inorganic nanoparticles are uniformly dispersed in the back sheet film. The surface treatment is carried out by coating at least one layer of inorganic oxide or organic compound on the surface of the inorganic nano-particles. Wherein the inorganic oxide is SiO2、Al2O3And the like.
According to the solar backboard film, the ultraviolet-resistant auxiliary agent is added into the fluorine-free resin of the first layer and the second layer, and the backboard film with good weather resistance can be obtained through a multilayer co-extrusion process.
According to the solar back panel film, the multiple resins in a certain ratio are added into the base material of the third layer, so that the solar back panel film and the EVA adhesive have good bonding performance, the stripping difficulty is greatly improved, and the bonding performance is good.
The invention also provides a manufacturing method of the solar back panel film, which comprises the following steps:
preparing and forming a first layer, a second layer and a third layer by a three-layer co-extrusion process;
wherein the first layer and the third layer are added with an anti-ultraviolet auxiliary agent.
Specifically, the compound can be prepared by the following steps:
s1 granulation: uniformly mixing raw materials and functional materials, such as an anti-ultraviolet auxiliary agent or an anti-hydrolysis stabilizer, and carrying out twin-screw mixing granulation to obtain functional master batches of each layer; the functional material refers to other raw materials which have corresponding functions besides the matrix material, such as an anti-ultraviolet assistant, an anti-hydrolysis stabilizer, nano inorganic particles, a coloring agent or other assistants.
S2 casting: adopting a three-layer co-extrusion process; mixing the non-fluorine resin and the functional master batch obtained in the step S1 according to a ratio, and performing multi-layer co-extrusion melting plasticization and tape casting by using three extruders after mixing;
s3 stretch film forming: and (5) longitudinally stretching, transversely stretching, heat setting, rolling and packaging the cast sheet obtained in the step S2 to obtain the solar back panel film.
In step S1, the first layer of functional mother particles, the second layer of functional mother particles, and the third layer of functional mother particles may be obtained in sequence. Specifically, the fluororesin and the anti-ultraviolet auxiliary agent are uniformly mixed, and the mixture is subjected to twin-screw mixing granulation to obtain the first layer of functional master batch. And uniformly mixing the non-fluorine resin and the anti-hydrolysis agent, and carrying out double-screw mixing granulation to obtain the second-layer functional master batch. And uniformly mixing the fluorine-free resin and the anti-ultraviolet auxiliary agent, and carrying out double-screw mixing granulation to obtain the third layer of functional master batch. Of course, if the functional materials such as the anti-ultraviolet auxiliary agent, the anti-hydrolysis stabilizing agent and the like are not contained in each layer, the granulation process can be omitted. If other functional materials, such as nano inorganic particles, are required to be added into each layer, the corresponding functional materials can be correspondingly added in the granulation process to obtain the functional master batch.
Hereinafter, the solar back sheet film of the present invention will be further described with reference to specific examples.
The solar back panel film provided by the invention is tested for the following main properties.
Hydrolysis resistance: the test was carried out using a PCT-35 high pressure accelerated aging tester manufactured by Dongguan Hongjin, Inc., at a temperature of 121 deg.C and a pressure of two atmospheres for a test time of 60 hours. After the PCT experiment, the tensile strength and elongation at break of the backsheet film were measured using a tensile tester.
Ultraviolet resistance: QUV ultraviolet accelerated aging tester adopts UVA340 lamp tube.
Yellowing b value: the b value was measured by an integrating sphere D/8 DEG structure under the light source condition of D65 using a ColorQuest XE spectrocolorimeter (Hunterlab Co., Ltd.) according to the GB/T3979-2008 standard. Yellowness b-value of backsheet film after 90kWh of irradiation of the backsheet film through a UVA340 lamp tube-b-value of the original backsheet film.
And (3) binding power with EVA: and (3) laminating the back plate film with EVA and glass, and testing the peeling force of the back plate and the EVA by using a tensile testing machine.
Example 1
The solar backplane film provided by this embodiment, the first layer of the backplane film includes: the PET resin accounts for 88 mass percent, the silicon dioxide accounts for 7 mass percent, and the ultraviolet resistant agent accounts for 5 mass percent; the second layer includes: the PET resin accounts for 90% by mass, the nano titanium dioxide accounts for 5% by mass, the carbodiimide accounts for 5% by mass, and the third layer comprises: the PET resin accounts for 80% by mass, the PE resin accounts for 13% by mass, the nano silicon dioxide accounts for 5% by mass, and the anti-ultraviolet agent accounts for 2% by mass. The back plate film is of a three-layer co-extrusion structure, the total thickness of the back plate film is 0.250mm, the thickness of the first layer is 0.02mm, the thickness of the second layer is 0.21mm, and the thickness of the third layer is 0.02 mm. The relevant properties are shown in Table 1.
Example 2
The solar backplane film provided by this embodiment, the first layer of the backplane film includes: 82% of PET resin, 10% of silicon dioxide and 8% of anti-ultraviolet agent; the second layer includes: the PET resin accounts for 90% by mass, the nano titanium dioxide accounts for 5% by mass, the carbodiimide accounts for 5% by mass, and the third layer comprises: the weight percentage of the PET resin is 15%, the weight percentage of the PE resin is 67%, the weight percentage of the nano silicon dioxide is 10%, and the weight percentage of the ultraviolet resistant agent is 8%. The back plate film is of a three-layer co-extrusion structure, the total thickness of the back plate film is 0.125mm, the thickness of the first layer is 0.01mm, the thickness of the second layer is 0.105mm, and the thickness of the third layer is 0.01 mm. The relevant properties are shown in Table 1.
Example 3
The solar backplane film provided by this embodiment, the first layer of the backplane film includes: the PET resin accounts for 90% by mass, the inorganic filler accounts for 9% by mass, and the anti-ultraviolet agent accounts for 1% by mass; the second layer includes: 85% of PET resin, 10% of nano titanium dioxide and 5% of carbodiimide, and the third layer comprises: the weight percentage of the PET resin is 15%, the weight percentage of the PE resin is 83%, the weight percentage of the nano silicon dioxide is 1%, and the weight percentage of the ultraviolet resistant agent is 1%. The back plate film is of a three-layer co-extrusion structure, the total thickness of the back plate film is 0.350mm, the thickness of the first layer is 0.05mm, the thickness of the second layer is 0.25mm, and the thickness of the third layer is 0.05 mm. The relevant properties are shown in Table 1.
Example 4
The solar backplane film provided by this embodiment, the first layer of the backplane film includes: 89% by mass of PET resin, 5% by mass of silicon dioxide and 6% by mass of anti-ultraviolet agent; the second layer includes: 91.5 percent of PET resin, 7 percent of nano titanium dioxide and 1.5 percent of carbodiimide, and the third layer comprises: the PET resin accounts for 80% by mass, the PE resin accounts for 13% by mass, the nano silicon dioxide accounts for 5% by mass, and the anti-ultraviolet agent accounts for 2% by mass. The back plate film is of a three-layer co-extrusion structure, the total thickness of the back plate film is 0.250mm, the thickness of the first layer is 0.02mm, the thickness of the second layer is 0.21mm, and the thickness of the third layer is 0.02 mm. The relevant properties are shown in Table 1.
Example 5
The solar backplane film provided by this embodiment, the first layer of the backplane film includes: 89% by mass of PET resin, 5% by mass of silicon dioxide and 6% by mass of anti-ultraviolet agent; the second layer includes: 91.5 percent of PET resin, 7 percent of nano titanium dioxide and 1.5 percent of carbodiimide, and the third layer comprises: the PET resin accounts for 80% by mass, the PE resin accounts for 13% by mass, the nano silicon dioxide accounts for 5% by mass, and the anti-ultraviolet agent accounts for 2% by mass. The back plate film is of a three-layer co-extrusion structure, the total thickness of the back plate film is 0.300mm, the thickness of the first layer is 0.024mm, the thickness of the second layer is 0.252mm, and the thickness of the third layer is 0.024 mm. . The relevant properties are shown in Table 1.
Example 6
The solar backplane film provided by this embodiment, the first layer of the backplane film includes: the PET resin accounts for 88 mass percent, the silicon dioxide accounts for 6 mass percent, and the ultraviolet resistant agent accounts for 6 mass percent; the second layer includes: 91.5 percent of PET resin, 7 percent of nano titanium dioxide and 1.5 percent of carbodiimide, and the third layer comprises 82 percent of PET resin, 12 percent of EVA, 5 percent of nano barium sulfate and 2 percent of anti-ultraviolet agent. The back plate film is of a three-layer co-extrusion structure, the total thickness of the back plate film is 0.250mm, the thickness of the first layer is 0.02mm, the thickness of the second layer is 0.21mm, and the thickness of the third layer is 0.02 mm. The relevant properties are shown in Table 1.
As can be seen from the performance parameter tests in each of examples 1 to 6 in table 1, the solar back sheet film of the present invention has a low yellowing value and good weather resistance, and the low yellowing value indicates that even under the influence of ultraviolet rays, the solar back sheet film has a small influence on the absorption effect of solar cells on sunlight, and can ensure the output power of the module. The solar back plate film has high elongation at break, and the stripping force after the solar back plate film is combined with EVA is greatly improved, so that the solar back plate film has good combination property. Therefore, the solar backboard has good comprehensive performance and can be widely applied to various special environments such as low temperature, humidity, strong ultraviolet rays and the like.
To better illustrate the beneficial effects of the solar backsheet film of the invention, the invention also provides the following comparative examples:
comparative example 1
The solar back sheet film provided by the comparative example is a polyester film of a single-layer structure, and the polyester film includes: the PET resin is 100% by mass and 0.250mm thick. And obtaining the polyester film by a biaxial stretching process. The relevant properties are shown in Table 1.
As can be seen from the comparison of the performance parameters of the comparative example and other examples in Table 1, the yellowing value of the solar back sheet film after 90kWh irradiation is greatly improved, the brittleness is increased, and the elongation at break is reduced in the polyester film with a single-layer structure without adding the anti-ultraviolet agent. And the pure PET resin in the single-layer structure has small stripping force after being combined with EVA, and the combination property is poor.
Comparative example 2
The solar back panel film provided by the comparative example is of a three-layer structure, wherein the first layer comprises 100% of PET resin by mass; the second layer includes: the mass percent of the PET resin is 95 percent, and the mass percent of the carbodiimide is 5 percent; the third layer includes: the mass percentage of the PET resin is 100%. The solar back plate film is of a three-layer co-extrusion structure, the total thickness of the back plate film is 0.250mm, the thickness of the first layer is 0.02mm, the thickness of the second layer is 0.21mm, and the thickness of the third layer is 0.02 mm. The relevant properties are shown in Table 1.
As can be seen from the comparison of the performance parameters of the comparative example 2 and other examples in the table 1, the yellowing value of the solar back panel film after being irradiated by 90kWh is greatly improved without adding the ultraviolet resistant agent, the brittleness is increased, and the elongation at break is reduced. The base material of the third layer in comparative example 1 is pure PET, and the peel force after the third layer is combined with EVA is small, and the combination performance is not good.
Table 1 performance test results of solar back sheet films of examples of the present invention and comparative examples
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A solar back sheet film having a multilayer structure comprising a first layer, a second layer and a third layer, the first layer and the third layer being located on both sides of the second layer, the components of the first layer and the third layer comprising a non-fluorine-containing resin and an anti-uv additive, wherein the non-fluorine-containing resin of the third layer comprises a first resin and a second resin, the first resin is at least one of polyethylene, polypropylene and an ethylene-vinyl acetate copolymer, and the second resin is at least one of polyethylene terephthalate, polybutylene terephthalate and polyethylene naphthalate; the multilayer structure is prepared by a multilayer co-extrusion process.
2. The solar backsheet film of claim 1, wherein the composition of the first and third layers comprises: 82-90% of fluororesin-free and 1-8% of anti-ultraviolet auxiliary agent.
3. The solar backsheet film of claim 1, wherein said uv-blocking auxiliary is at least one of salicylates, benzophenones, benzotriazoles, substituted acrylonitriles, triazines.
4. The solar backsheet film of claim 1, wherein the composition of the second layer comprises 85-91.5% by mass of a fluorine-free resin and 1.5-5% by mass of an anti-hydrolysis agent.
5. The solar backsheet film of claim 1, wherein the non-fluororesin of the first and second layers is a polyester resin comprising at least one of polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate.
6. The solar backsheet film of claim 1, wherein the first resin is present in an amount of 13 to 83% by mass and the second resin is present in an amount of 15 to 82% by mass.
7. The solar back sheet film according to claim 1, wherein at least one layer of the multi-layer structure is further added with inorganic nanoparticles, and the mass percentage of the inorganic nanoparticles is 5% to 10%.
8. The solar back sheet film according to claim 7, wherein the inorganic nanoparticles of the first and third layers are at least one of nano-silica, nano-titania, nano-barium sulfate, and nano-alumina; the inorganic nano particles of the second layer are at least one of nano montmorillonite, nano silicon dioxide, nano mica sheet or nano titanium nitride.
9. A method for preparing a solar back sheet film according to any one of claims 1 to 8, wherein:
preparing and forming the first layer, the second layer and the three layers by a three-layer co-extrusion process;
and adding an anti-ultraviolet auxiliary agent to the first layer and the third layer.
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| CN111761909A (en) * | 2020-05-27 | 2020-10-13 | 浙江华正能源材料有限公司 | Outer-layer film material for aluminum-plastic film, black flame-retardant aluminum-plastic film and application of black flame-retardant aluminum-plastic film |
| CN116836524B (en) * | 2023-07-31 | 2024-04-02 | 常州勤邦新材料科技有限公司 | Polyester functional master batch for producing high-reflection backboard film |
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