CN109244166B - Packaging front plate and preparation process thereof - Google Patents
Packaging front plate and preparation process thereof Download PDFInfo
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- CN109244166B CN109244166B CN201811120897.6A CN201811120897A CN109244166B CN 109244166 B CN109244166 B CN 109244166B CN 201811120897 A CN201811120897 A CN 201811120897A CN 109244166 B CN109244166 B CN 109244166B
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- 238000004806 packaging method and process Methods 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title claims description 13
- 238000002834 transmittance Methods 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000002131 composite material Substances 0.000 claims abstract description 32
- 230000004888 barrier function Effects 0.000 claims abstract description 31
- 239000010410 layer Substances 0.000 claims description 110
- 239000012790 adhesive layer Substances 0.000 claims description 41
- 239000000463 material Substances 0.000 claims description 39
- 239000000758 substrate Substances 0.000 claims description 28
- 229910052731 fluorine Inorganic materials 0.000 claims description 27
- 239000011737 fluorine Substances 0.000 claims description 27
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 26
- 239000000741 silica gel Substances 0.000 claims description 24
- 229910002027 silica gel Inorganic materials 0.000 claims description 24
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 23
- 239000002987 primer (paints) Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 19
- 230000001681 protective effect Effects 0.000 claims description 15
- 238000000576 coating method Methods 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 11
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 9
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 7
- 238000013329 compounding Methods 0.000 claims description 7
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 229920002635 polyurethane Polymers 0.000 claims description 7
- 239000004814 polyurethane Substances 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 6
- 238000007761 roller coating Methods 0.000 claims description 6
- 238000010345 tape casting Methods 0.000 claims description 6
- 229920001780 ECTFE Polymers 0.000 claims description 5
- 239000002033 PVDF binder Substances 0.000 claims description 5
- 239000011247 coating layer Substances 0.000 claims description 5
- 229920002620 polyvinyl fluoride Polymers 0.000 claims description 5
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 5
- 229920002799 BoPET Polymers 0.000 claims description 4
- 238000010030 laminating Methods 0.000 claims description 4
- 229920000728 polyester Polymers 0.000 claims description 4
- 238000000231 atomic layer deposition Methods 0.000 claims description 3
- 238000001755 magnetron sputter deposition Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims 1
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 238000012858 packaging process Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 238000010248 power generation Methods 0.000 abstract description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract 1
- 239000010408 film Substances 0.000 description 98
- 239000010409 thin film Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000005038 ethylene vinyl acetate Substances 0.000 description 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 2
- 239000002952 polymeric resin Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000002313 adhesive film Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009459 flexible packaging Methods 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920006280 packaging film Polymers 0.000 description 1
- 239000012785 packaging film Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
Landscapes
- 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)
- Laminated Bodies (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention provides a packaging front plate which is a composite film attached to the upper surface of a solar cell module and has high barrier effect and high light transmittance. The product has lower water vapor transmission rate (less than 10 ‑6 g/m 2 day) and higher light transmittance (more than 95 percent), the service life of the battery can be prolonged, the power generation efficiency is improved, and meanwhile, the product packaging process is simple and efficient, and the yield is improved.
Description
Technical Field
The present invention relates to a solar cell package assembly, and more particularly, to a package front plate for a flexible solar cell and a process for manufacturing the same.
Background
At present, in a solar cell module, packaging quality plays an important role in the service life of a cell. The front plate sealing structure of the solar cell module is mainly used for isolating air and water vapor from penetrating into the cell module, and plays a role in protecting the solar cell.
As a new variety of solar cells, flexible thin film solar cells are becoming more and more important, with advanced technology, excellent performance and wide application. Due to the application environment specificity of the flexible thin film solar module, the solar front panel is required to have certain light transmittance, ageing resistance, insulativity, self-cleaning property, flame retardance and windability, and meanwhile, due to the fact that certain thin film batteries (such as CIGS thin film batteries) are sensitive to moisture, the flexible solar front panel also has high water blocking performance, and WVTR is less than 5 x 10 < -3 > (g/m 2. Day). Patent CN102738283a discloses a front plate packaging structure of a solar module, in which a front plate packaging structure is formed on a first EVA film, and an ETFE fluoroplastic film is used, which can improve durability and heat insulation performance to some extent. At present, the conventional flexible solar front panel material adopts a composite film generally, which comprises an ETFE film, a UV barrier film, a water barrier film, a PET film and the like, and the product has poor water resistance, light transmittance, insulativity and weather resistance, complex packaging process and low yield.
The invention develops a novel flexible packaging front plate material, which has the characteristics of fingerprint resistance, scratch resistance, thinness and softness, higher water vapor blocking effect and light transmittance, can prolong the service life of a battery, improves the power generation efficiency, and has the advantages of simple and efficient product packaging process and high yield.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention particularly provides a high-light-source packaging front plate structure and a preparation method thereof. The invention develops a packaging front plate material and discloses a preparation process thereof, wherein the packaging front plate material can be applied to the solar cell packaging front plate, and the packaging front plate with high barrier effect and high light transmittance and the preparation process thereof can meet the requirements of self cleaning, fingerprint scratch resistance, light weight, thinness and softness, and simultaneously the front plate has lower water vapor transmittance (less than 10 < -6 > g/m < 2 > day) and higher light transmittance (more than 95%), so that the service life of a cell can be prolonged, the power generation efficiency is improved, the product packaging process is simple and efficient, and the yield is improved.
The invention provides a packaging front plate, which is a composite film attached to the upper surface of a solar cell module, and is characterized by comprising a first adhesive layer, a first water vapor barrier layer, a first modified prime coating layer, a first film substrate layer, a second adhesive layer, a second water vapor barrier layer, a second modified prime coating layer, a second film substrate layer and a silica gel layer from top to bottom.
The term "packaging front plate" used in the present invention refers to a material that plays a role in packaging protection on the upper surface of a photovoltaic chip. The packaging front plate is actually a composite film covered on the upper surface of the battery component, the film has a multi-layer structure, and is composed of a plurality of material layers with the same or different properties and compositions, and each material layer can be compounded together through the technical means of deposition, film plating, lamination and the like through the structural forms of coating and films, so that the packaging front plate is formed. The packaging front plate materials commonly used in the prior art are polymers such as PVB polyvinyl butyral resin, EVA ethylene-vinyl acetate copolymer and the like.
The partial solar packaging front plate in the prior art has lower water vapor transmittance of about 10 < -2 > g/m < 2 > day < -10 > -5 > g/m < 2 > day, and lower light transmittance of less than 90%. Meanwhile, the transparent packaging film of the common solar cell has poor light transmittance, chemical substances are easy to separate out, the aging resistance effect is poor, the process operation temperature is higher (generally 140 ℃) and the process time is longer (generally laminating time is 20-30 min), and part of adhesive films also need special equipment, so that the packaging process is complex, the cost is high, the yield is low, and meanwhile, the product is thick and hard.
The light, thin and soft flexible solar cell packaging front plate with high barrier effect and high light transmittance provided by the invention can meet the requirements of self-cleaning, fingerprint resistance, scratch resistance, light, thin and soft, and meanwhile, the front plate has lower water vapor transmittance (less than 10 < -6 > g/m < 2 > day) and higher light transmittance (more than 95%), so that the service life of a cell can be prolonged, the power generation efficiency is improved, and meanwhile, the product packaging process is simple and efficient, and the yield is improved.
The packaging front plate composite film has high barrier effect and high light transmittance. The performance indexes of the flexible solar cell packaging front plate obtained by the invention are as follows: the thickness is 0.2-0.4mm, the light transmittance is more than 95%, the water vapor transmittance is lower than 10 < -6 > g/m < 2 > day, the surface hardness is 2H-3H, the tensile strength is more than 170MPa, and the elongation at break is more than 140%.
In a further preferable scheme, the upper surface of the first adhesive layer is further compounded with a fluorine film material layer, and the thickness of the fluorine film material layer is 25-50 um.
In a further preferred embodiment, the fluorine film material of the fluorine film material layer is PVF, PVDF, ETFE or ECTFE fluorine-containing thin film material, and the light transmittance is 93% or more.
In a further preferable scheme, a PE protective film is further compounded on the lower surface of the silica gel layer.
In a further preferred embodiment, the first and second adhesive layers have a thickness of 5-30um.
In a further preferred embodiment, the thickness of the first and second water vapor barrier layers is 1-30um.
In a further preferred embodiment, the first and second modified primer coatings have a thickness of 1 to 15um.
In a further preferable embodiment, the thickness of the first and second film substrate layers is 50-200um, and the visible light transmittance is more than 90%.
In a further preferred embodiment, the thickness of the silica gel layer is 100-200um.
In a further preferred embodiment, the first and second modified primer coatings may be selected from acrylic, polyurethane or polyester based coatings.
In a further preferred embodiment, the first and second adhesive layers comprise polyurethane or acrylic materials.
The invention further provides a preparation process of the packaging front plate, which is characterized by comprising the following steps of:
step 1: providing a first film substrate layer and a second film substrate layer, respectively coating wet films of a first modified primer coating and a second modified primer coating on the upper surfaces of the two layers, and drying at a high temperature of 70-90 ℃ to form dry films of the two layers of the first modified primer coating and the second modified primer coating;
step 2: adopting the composite film prepared in the step 1, and adopting an atomic layer deposition process or a magnetron sputtering process to prepare a first water vapor barrier layer and a second water vapor barrier layer on the upper surfaces of the first modified primer coating and the second modified primer coating;
step 3: preparing fluid of the adhesive layer, treating the fluid on the upper surfaces of the two water vapor barrier layers by adopting a wire coating, knife coating or roller coating mode to obtain wet films of the first and second adhesive layers, preferably at 50-100 ℃, and drying for 1-5min to obtain dry films of the first and second adhesive layers, preferably with the thickness of 5-30um;
step 4: and (3) preparing a wet film of the silica gel layer on the lower surface of the second film substrate layer by adopting a spraying, knife coating or roller coating mode, preferably at 50-100 ℃, drying for 1-5min to obtain the silica gel layer, preferably with the thickness of 100-200 mu m, and simultaneously compounding the protective film and rolling to obtain a finished product.
In a further preferred embodiment, the fluorine film material of the fluorine film material layer is PVF, PVDF, ETFE or ECTFE fluorine-containing thin film material, and the light transmittance is 93% or more.
In a further preferred embodiment, after the step 4, the method further includes the following steps: and after the silica gel layer is prepared, a PE protective film is compounded on the lower surface of the silica gel layer through pressure bonding.
In a further preferred embodiment, the first and second modified primer coatings may be acrylic, polyurethane or polyester based coatings.
In a further preferred embodiment, in the step 3, the preparation process of the fluid of the adhesive layer includes: adding high polymer resin, tackifying resin, plasticizer, solvent and the like into a reaction kettle, stirring at a high speed of a stirrer at 2000 rpm, uniformly mixing, and adding the mixed solution into a liquid storage tank of coating equipment, wherein the high polymer resin can be polyurethane and acrylic materials.
The packaging front plate and the preparation process thereof provided by the invention can obtain one or more of the following beneficial effects, without limitation:
1. the novel fingerprint sensor can meet the requirements of self cleaning, fingerprint scratch resistance, thinness and softness, and meanwhile, the front plate has lower water vapor transmittance (less than 10 < -6 > g/m < 2 > day) and higher light transmittance (more than 95%), so that the service life of a battery can be prolonged, the power generation efficiency is improved, meanwhile, the product packaging process is simple and efficient, and the yield is improved.
2. An adhesive layer is introduced, so that the flexible front plate has the characteristics of light weight, thinness and softness; the double-layer water vapor barrier layer structure is introduced to reduce the water vapor transmittance, which is less than 10 < -6 > g/m < 2 > day; by introducing the high-light-transmittance silica gel, the light transmittance of the product is improved to more than 95 percent.
3. The traditional method for preparing the composite film layer by layer in sequence is abandoned, the method comprises the steps of firstly compounding a plurality of film layers, and finally compounding the film layers compounded in sequence by using an adhesive layer as an adhesive transition layer; the adhesion-promoting resin is added into the adhesive layer, so that the adhesive and the composite strength can be improved.
Drawings
Fig. 1 is a schematic view of a package front plate composite film according to an embodiment of the present invention.
Fig. 2 is a schematic view of a package front-plate composite film according to an embodiment of the present invention.
Wherein the reference numerals are as follows: the protective film comprises a 1-fluorine film material layer, a 2-first adhesive layer, a 3-first water vapor barrier layer, a 4-first modified primer coating, a 5-first film substrate layer, a 6-second adhesive layer, a 7-second water vapor barrier layer, an 8-second modified primer coating, a 9-second film substrate layer, a 10-silica gel layer and an 11-PE protective film.
Detailed Description
The technical scheme and advantages of the present invention will be explained and illustrated in more detail below with reference to the drawings and detailed description. It should be understood that the matters presented in the description, the detailed description and the accompanying drawings are only for the purpose of clearly illustrating the technical solution of the present invention and its advantages, and are not to be construed as limiting the scope of the present invention. Based on the disclosure of the specification, a person skilled in the art can obtain various changed technical schemes for various reasonable changes, so long as the spirit of the invention is not deviated, and various changed technical schemes are included in the protection scope of the invention.
Example 1
Hereinafter, the packaging front plate composite film and the manufacturing process thereof according to the present embodiment will be described in detail with reference to fig. 1.
The package front plate of the embodiment is composed of a composite film tightly covered on the upper surface of the solar cell module, and is formed by compounding multiple layers of films. Wherein 2 is a first adhesive layer with a thickness of 5-30um, more preferably 5-25um, more preferably 10-20um, more preferably 15um, and the flexible front plate has light, thin and soft characteristics by introducing the adhesive layer; 3 is a first water vapour barrier layer having a thickness of 1 to 30um, more preferably 5 to 25um, more preferably 10 to 20um, more preferably 15um;4 is a modified base coat layer with a thickness of 1-15um, more preferably 3-12um, more preferably 5-8 um; 5 is a first film substrate layer, the thickness is 50-200um, more preferably 80-150um, more preferably 100-120um, the first film substrate layer is a PET film with high light transmittance, and the visible light transmittance is more than 90%; 6 is a second adhesive layer with the thickness of 5-30um, more preferably 5-25um, more preferably 10-20um, more preferably 15um, which plays the roles of adhesion and isolation, and simultaneously makes the flexible front plate light, thin and soft; 7 is a second water vapor barrier layer with a thickness of 1-30um, more preferably 5-25um, more preferably 10-20um, more preferably 15um, and the water vapor transmittance is reduced by introducing a double-layer water vapor barrier layer structure, which is less than 10-6g/m2day;8 is a second modified primer coating having a thickness of 1-15um, more preferably 3-12um, and even more preferably 5-8 um; 9 is a second film substrate layer with the thickness of 50-200um, more preferably 80-150um, more preferably 100-120um, wherein the second film substrate layer is a PET film with high light transmittance, the visible light transmittance is more than 90%, 10 is a silica gel layer with the thickness of 100-200um, and the light transmittance of the product is improved to more than 95% by introducing the high light transmittance silica gel layer.
The specific preparation process of the packaging front plate with the structure of the embodiment comprises the following steps:
step 1: providing a first film substrate layer and a second film substrate layer, respectively coating wet films of a first modified primer coating and a second modified primer coating on the upper surfaces of the two layers, and preferably drying at a high temperature of 70-90 ℃ to form dry films of the two layers of the first modified primer coating and the second modified primer coating;
step 2: adopting the composite film prepared in the step 1, and adopting an atomic layer deposition process or a magnetron sputtering process to prepare two first and second water vapor barrier layers on the upper surfaces of the two first and second modified base coat layers; step 3: preparing fluid of the adhesive layer, treating the fluid on the upper surfaces of the two water vapor barrier layers by adopting a wire coating, knife coating or roller coating mode to obtain wet films of the two first and second adhesive layers, preferably at 50-100 ℃, drying for 1-5min to obtain dry films of the first and second adhesive layers, and preferably at 5-30 mu m in thickness;
step 4: and (3) preparing a wet film of the silica gel layer on the lower surface of the second film substrate layer by adopting a spraying, knife coating or roller coating mode, preferably at 50-100 ℃, drying for 1-5min to obtain the silica gel layer, preferably with the thickness of 100-200 mu m, and simultaneously compounding the protective film and rolling to obtain a finished product.
The structure of the package front plate obtained in this embodiment is shown in fig. 1. The packaging front plate is a composite film attached to the upper surface of the solar cell module, has a high barrier effect and high barrier rate, and comprises a first adhesive layer 2, a first water vapor barrier layer 3, a first modified prime coating 4, a first film substrate layer 5, a second adhesive layer 6, a second water vapor barrier layer 7, a second modified prime coating 8, a second film substrate layer 9 and a silica gel layer 10 from top to bottom.
Example 2
In order to further adjust and optimize the structure and the comprehensive performance of the package front plate of the present invention, the following improvements are made in the structure and the manufacturing process thereof on the basis of the package front plate of example 1 in this example 2.
Preferably, on the basis of the packaging front plate composite film structure in embodiment 1, the upper surface of the first adhesive layer 2 is further compounded with a fluorine film material layer, and the thickness is 25um-50um; the fluorine film material of the fluorine film material layer is PVF, PVDF, ETFE or ECTFE fluorine-containing film material, and the light transmittance is more than 93%. More preferably, a PE protective film 11 is laminated on the lower surface of the silicone layer 10.
The specific preparation steps of the packaging front plate composite film of the embodiment 2 are as follows:
the method for preparing the packaging front plate composite film in the embodiment 1 can also preferably comprise the following steps: in step 4, before the wet film for preparing the silica gel layer 10 is formed, the method further comprises the following steps: and (3) sequentially laminating the fluorine film material layer with the composite film prepared in the step (3) and respectively provided with the first adhesive layer (2) dry film and the two composite films prepared in the step (3) and provided with the second adhesive layer (6) dry film, and rolling for standby after being bonded and compounded under pressure, wherein the upper surface of the first adhesive layer (2) dry film is bonded with the fluorine film material layer (1), and the upper surface of the second adhesive layer (6) dry film is bonded with the first film substrate layer (5).
More preferably, on the basis of the method for preparing a composite film of a front plate for packaging in embodiment 1, after the step 4, the method further includes the following steps: after the silica gel layer 10 is prepared, a PE protective film 11 is laminated on the lower surface thereof by pressure bonding.
A schematic structure of the package front plate obtained in this embodiment is shown in fig. 2. Wherein 1 is a fluorine film material layer, and the thickness is preferably 25-50 um; and 11 is a PE protective film which is easy to tear and plays a role in protecting the finished product composite film of the packaged front plate, and when the packaged front plate composite film is required to be packaged on the surface of the solar cell, the protective film is uncovered.
The embodiment obtains a packaging front plate, and the composite film comprises a fluorine film material layer 1, a first adhesive layer 2, a first water vapor barrier layer 3, a first modified primer coating 4, a first film substrate layer 5, a second adhesive layer 6, a second water vapor barrier layer 7, a second modified primer coating 8, a second film substrate layer 9, a silica gel layer 10 and a PE protective film 11 from top to bottom.
When the packaging front plate prepared by the preparation process is used, and particularly applied to the upper surface of a packaging flexible solar cell module, a conventional packaging method in the prior art can be adopted. For example, a mold matched with the packaged solar cell panel is prepared firstly, a layer of adhesive mold material is sprayed and sintered on the inner surface of the mold, the solar cell panel is placed into a groove of the mold, then the template on which the solar cell panel is placed is covered with the composite film of the front packaging plate provided by the invention (when the composite film is placed, the PE protective film on the outermost layer of the composite film is firstly removed), and then the composite film is placed into a laminating machine for packaging, and is cooled and demoulded after being taken out.
The invention is applied to the packaging front plate of the flexible solar cell, has high barrier effect and high light transmittance, can meet the requirements of self cleaning, fingerprint resistance, scratch resistance, lightness, thinness and softness, and simultaneously has lower water vapor transmittance (less than 10 < -6 > g/m < 2 > day) and higher light transmittance (more than 95 percent), thereby not only prolonging the service life of the cell, but also improving the power generation efficiency, and simultaneously has simple and efficient product packaging process and improved yield.
Here, it should be noted that the description of the above technical solution is exemplary, and the present specification may be embodied in different forms and should not be construed as being limited to the technical solution set forth herein. Rather, these descriptions will be provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Furthermore, the technical solution of the invention is limited only by the scope of the claims.
The shapes, dimensions, ratios, angles, and numbers disclosed for describing aspects of the present specification and claims are merely examples, and thus, the present specification and claims are not limited to the details shown. In the following description, a detailed description of related known functions or configurations will be omitted when it may be determined that the emphasis of the present specification and claims is unnecessarily obscured.
Where the terms "comprising," "having," and "including" are used in this specification, there may be another part or parts unless "only" is used, and the terms used may generally be in the singular but may also mean the plural.
It should be noted that although the terms "first," "second," "top," "bottom," "one side," "another side," "one end," "the other end," etc. may be used and used in this specification to describe various components, these components and portions should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, with top and bottom elements, under certain circumstances, also being interchangeable or convertible with one another; the components at one end and the other end may be the same or different in performance from each other.
In addition, when constituting the components, although not explicitly described, it is understood that a certain error region is necessarily included.
In describing positional relationships, for example, when positional sequences are described as "on," "above," "below," and "next," unless words or terms such as "just" or "directly" are used, it is also possible to include cases where there is no contact or contact between them. If a first element is referred to as being "on" a second element, it does not mean that the first element must be located above the second element in the figures. The upper and lower portions of the component will change in response to changes in the angle and orientation of the view. Thus, in the drawings or in actual construction, if it is referred to that a first element is "on" a second element, it can comprise the case that the first element is "under" the second element and the case that the first element is "over" the second element. In describing the time relationship, unless "just" or "direct" is used, a case where there is no discontinuity between steps may be included in describing "after", "subsequent" and "preceding". The features of the various embodiments of the invention may be combined or spliced with one another, either in part or in whole, and may be implemented in a variety of different configurations as will be well understood by those skilled in the art. Embodiments of the present invention may be performed independently of each other or may be performed together in an interdependent relationship.
Claims (5)
1. A preparation process of a packaging front plate is characterized in that,
the packaging front plate is a composite film attached to the upper surface of the solar cell module, and the composite film comprises a first adhesive layer, a first high-water vapor barrier layer, a first modified prime coating layer, a first film substrate layer, a second adhesive layer, a second water vapor barrier layer, a second modified prime coating layer, a second film substrate layer and a silica gel layer from top to bottom;
the upper surface of the first adhesive layer is also compounded with a fluorine film material layer, and the thickness is 25-50 um;
the fluorine film material of the fluorine film material layer is PVF, PVDF, ETFE or ECTFE fluorine-containing film material, and the light transmittance is more than 93%;
the lower surface of the silica gel layer is also compounded with a PE protective film;
the first film substrate layer and the second film substrate layer are PET films, the thickness is 50-200 mu m, and the visible light transmittance is more than 90%;
the first and second modified primer coatings can be acrylic acid, polyurethane or polyester coatings;
the first adhesive layer and the second adhesive layer contain polyurethane or acrylic materials;
the preparation process comprises the following steps:
step 1: providing a first film substrate layer and a second film substrate layer, respectively coating wet films of a first modified primer coating and a second modified primer coating on the upper surfaces of the two layers, and drying at a high temperature of 70-90 ℃ to form dry films of the two modified primer coatings;
step 2: adopting the composite film prepared in the step 1, and adopting an atomic layer deposition process or a magnetron sputtering process to prepare two water vapor barrier layers on the upper surfaces of the two modified base coating layers;
step 3: preparing fluid of the adhesive layer, wherein in the step 2, the upper surfaces of the two water vapor barrier layers are treated by adopting a wire coating, knife coating or roller coating mode to obtain wet films of the two adhesive layers, and drying the wet films at 50-100 ℃ for 1-5min to obtain dry films of the two adhesive layers;
step 4: and (3) preparing a wet film of the silica gel layer on the lower surface of the second film substrate layer by adopting a spraying, knife coating or roller coating mode, drying at 50-100 ℃ for 1-5min to obtain the silica gel layer, and simultaneously compounding the protective film and rolling to obtain a finished product.
2. The process for preparing a front plate for package according to claim 1, wherein in the step 4, before the step of preparing the wet film of the silica gel layer, the process further comprises the steps of: providing a fluorine film material layer, sequentially laminating the fluorine film material layer with the composite film prepared in the step 3 and respectively provided with the first adhesive layer dry film and the two composite films prepared in the step 3 and provided with the second adhesive layer dry film, and rolling for standby after being subjected to compression bonding and compounding, wherein the upper surface of the first adhesive layer dry film is bonded with the fluorine film material layer, and the upper surface of the second adhesive layer dry film is bonded with the first film substrate layer.
3. The process for manufacturing a packaging front plate according to claim 2, wherein the fluorine film material of the fluorine film material layer is PVF, PVDF, ETFE or ECTFE fluorine-containing film material, and the light transmittance is 93% or more.
4. The process for manufacturing a front packaging board according to claim 1 or 2, further comprising the following steps after the step 4: and after the silica gel layer is prepared, a PE protective film is compounded on the lower surface of the silica gel layer through pressure bonding.
5. The process for preparing a packaging front plate according to claim 1, wherein the first and second modified primer coatings can be acrylic, polyurethane or polyester coatings.
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| CN201811120897.6A CN109244166B (en) | 2018-09-25 | 2018-09-25 | Packaging front plate and preparation process thereof |
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| CN201811120897.6A CN109244166B (en) | 2018-09-25 | 2018-09-25 | Packaging front plate and preparation process thereof |
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