CN220447401U - Composite film structure for photovoltaic panel - Google Patents
Composite film structure for photovoltaic panel Download PDFInfo
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- CN220447401U CN220447401U CN202321690168.0U CN202321690168U CN220447401U CN 220447401 U CN220447401 U CN 220447401U CN 202321690168 U CN202321690168 U CN 202321690168U CN 220447401 U CN220447401 U CN 220447401U
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- layer
- film
- film layer
- photovoltaic panel
- composite film
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- 239000002131 composite material Substances 0.000 title claims abstract description 31
- 239000010410 layer Substances 0.000 claims abstract description 89
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 claims abstract description 27
- 238000001125 extrusion Methods 0.000 claims abstract description 19
- 239000004698 Polyethylene Substances 0.000 claims abstract description 17
- 239000002346 layers by function Substances 0.000 claims abstract description 15
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 claims abstract description 13
- UFRKOOWSQGXVKV-UHFFFAOYSA-N ethene;ethenol Chemical group C=C.OC=C UFRKOOWSQGXVKV-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000004715 ethylene vinyl alcohol Substances 0.000 claims abstract description 12
- 239000004831 Hot glue Substances 0.000 claims description 8
- 239000012790 adhesive layer Substances 0.000 claims description 5
- 238000000071 blow moulding Methods 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000010408 film Substances 0.000 claims 24
- 239000010409 thin film Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 18
- 238000002834 transmittance Methods 0.000 abstract description 14
- 238000003475 lamination Methods 0.000 abstract description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 7
- 230000004888 barrier function Effects 0.000 abstract description 7
- 239000001301 oxygen Substances 0.000 abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 239000002313 adhesive film Substances 0.000 abstract description 5
- 230000032683 aging Effects 0.000 abstract description 5
- 230000037303 wrinkles Effects 0.000 abstract description 4
- 238000013329 compounding Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 239000003431 cross linking reagent Substances 0.000 description 3
- 239000002981 blocking agent Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 description 1
- 238000010101 extrusion blow moulding Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000275 quality assurance Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Laminated Bodies (AREA)
Abstract
The utility model discloses a composite film structure for a photovoltaic panel, which comprises an ETFE film layer and a plurality of co-extrusion film layers, wherein the ETFE film layer is glued on the plurality of co-extrusion film layers; the multilayer co-extrusion film layer comprises a base layer and a functional layer, wherein the base layer is formed on two sides of the functional layer, the functional layer is an EVOH film layer, and the base layer is a PE film layer; the thickness of the composite film for the photovoltaic panel is 40-50 mu m. According to the utility model, the ETFE film layer and the PE/EVOH/PE three-layer co-extrusion film layer are adopted for compounding, and the total thickness of the composite film is controlled to be 40-50 mu m, so that the high light transmittance is realized, the photovoltaic module is also protected for a long time, the oxygen barrier effect is good, and the ageing of an internal adhesive film is effectively prevented; the composite film has high stiffness, effectively prevents lamination wrinkles during subsequent lamination, has low manufacturing cost, can be widely applied to panel materials of photovoltaic modules, and is suitable for folding and flexible panel materials.
Description
Technical Field
The utility model relates to the technical field of photovoltaics, in particular to a composite film structure for a photovoltaic panel.
Background
The photovoltaic industry belongs to the green energy industry which is greatly developed in China, and makes great contribution to the utilization of green energy.
The photovoltaic module converts solar energy through a silicon wafer, and generally comprises a panel material, a battery piece, a back plate material, a junction box, a wire frame, and the like, wherein the panel material is used for transmitting light, packaging, protecting the battery piece, and the like, and the common panel material is glass, has good light transmittance, but has poor toughness (very brittle), and cannot meet the assembly requirements of the folding type flexible panel module. Aiming at the defects, panel materials with good flexibility have been developed, such as the use of an ETFE film to replace traditional glass with light weight, the ETFE film has certain flexibility, and has the advantages of long weather resistance, high light transmittance of more than 90%, flame retardance and the like, and is suitable for being applied to folding and flexible panel components, but the ETFE film still has some defects, mainly has poor oxygen barrier property, and causes ageing of internal adhesive films and the like after oxygen permeation during long-term use (25 years of quality assurance requirements), thereby influencing the service life of the photovoltaic component.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a composite film structure for a photovoltaic panel, which not only can realize high light transmittance, but also can play a long-acting protective role on a photovoltaic module, has good oxygen barrier effect, and is particularly suitable for being applied to a folding and flexible panel module.
In order to solve the technical problems, the composite film structure for the photovoltaic panel comprises an ETFE (ethylene-tetrafluoroethylene copolymer) film layer and a plurality of co-extrusion film layers, wherein the ETFE film layer is glued on the plurality of co-extrusion film layers;
the multilayer co-extrusion film layer comprises a base layer and a functional layer, wherein the base layer is formed on two sides of the functional layer, the functional layer is an EVOH (ethylene-vinyl alcohol copolymer) film layer, and the base layer is a PE (polyethylene) film layer;
the thickness of the composite film for the photovoltaic panel is 40-50 mu m.
Preferably, the ETFE film layer has a thickness of 15-20 μm.
Preferably, the thickness of the multilayer coextruded film layer is from 20 to 30 μm.
Preferably, the EVOH film layer has a thickness of 10-15 μm and the PE film layer has a thickness of 5-10 μm.
Preferably, the thickness of the adhesive layer between the ETFE film layer and the multilayer coextruded film layer is from 2 to 5 μm.
Preferably, the adhesive layer is made of modified EAA hot melt adhesive or modified EVA hot melt adhesive.
Preferably, the multilayer coextruded film layer is obtained by a multilayer coextrusion blow molding process.
Preferably, the ETFE film layer is glued to the multilayer coextruded film layer by a glue coating process.
The composite film compounded by adopting the ETFE film layer and the PE/EVOH/PE three-layer co-extrusion film layer is applied to panel materials, the total thickness of the composite film is controlled to be 40-50 mu m, high light transmittance can be realized, a long-acting protective effect can be achieved on a photovoltaic module, the oxygen barrier effect is good, and the ageing of an internal adhesive film is effectively prevented; the composite film has high stiffness, can effectively prevent lamination wrinkles during subsequent lamination, has low manufacturing cost, can be widely applied to panel materials of photovoltaic modules, and is particularly suitable for being applied to folding type flexible panel materials.
Drawings
In order to more clearly illustrate the technical solutions of the present utility model, the following brief description of the drawings is given for the purpose of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without the need for inventive work for a person skilled in the art.
FIG. 1 is a schematic view of a composite film structure for a photovoltaic panel according to an embodiment of the present utility model;
in the figure, a 1-ETFE film layer; 2-a multilayer coextruded film layer; 21-a base layer; 23-functional layer; 3-an adhesive layer.
Detailed Description
The following description of the embodiments of the present utility model will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, there is shown a composite film structure for a photovoltaic panel of the present utility model, comprising an ETFE film layer and a plurality of co-extruded film layers, to which the ETFE film layer is glued;
the multilayer co-extrusion film layer comprises a base layer and a functional layer, wherein the base layer is formed on two sides of the functional layer, the functional layer is an EVOH film layer, and the base layer is a PE film layer;
the thickness of the composite film for the photovoltaic panel is 40-50 mu m.
In the embodiment of the utility model, the ETFE film layer has the advantages of high light transmittance, high melting point, good flame retardance, excellent mechanical property, stable chemical property, good irradiation resistance, excellent weather resistance and the like, and can well play roles in light transmittance and protection when being applied to panel materials; the multilayer co-extrusion film layer (PE/EVOH/PE three-layer co-extrusion film layer) has good mechanical energy, high light transmittance and good air barrier property, can effectively block oxygen from entering, thereby effectively preventing the ageing of an internal adhesive film, and can also have a certain protection effect on a photovoltaic module, wherein the PE film layer is used as a base layer, has good mechanical property, molding processability and the like, plays a good supporting and retaining role on a functional layer, can also improve the stiffness and temperature resistance of a composite film structure, and the EVOH film layer is used as the functional layer, has excellent barrier properties such as gas, oil stain and the like, and has excellent mechanical strength, wear resistance, cold resistance and surface strength and good processability; meanwhile, the ETFE film layer and the multilayer co-extrusion film layer have good flexibility, so that the method is particularly suitable for assembling folding and flexible panel materials; in addition, in order to reduce the influence of the panel material on the light transmittance as much as possible, the total thickness of the composite film for the panel material is 40-50 mu m, if the thickness is too thin, the protection effect on the photovoltaic module is weakened, and if the thickness is too thick, the light transmittance is reduced; it should be further noted that the composite film for a photovoltaic panel of the present utility model has a high strength, the strength of which can reach 55-60MPa, whereas the strength of the ETFE film commonly used in the prior art is generally 40-50MPa, lamination wrinkles are not easy to occur during lamination and compounding, and meanwhile, the overall cost is reduced by 30-50% compared with the prior art.
In a specific embodiment, the ETFE film layer has a thickness of 15-20 μm. It is understood that below this thickness range, its protective effect on the photovoltaic module is reduced, and above this range, the thickness is higher and the cost is increased.
In a specific embodiment, the multilayer coextruded film layer has a thickness of 20 to 30 μm, wherein the PE film layer has a thickness of 5 to 10 μm and the EVOH film layer has a thickness of 10 to 15 μm; the multilayer coextruded film layer is obtained by a blow molding process. It is understood that in this embodiment, the multilayer co-extrusion film layer is obtained by three-layer co-extrusion blow molding, and in addition, in the preparation process, the multilayer co-extrusion film layer may be further subjected to online unidirectional stretching, the stretching multiplying power is 4-6 times, and the unidirectional stretching may further improve the stiffness and the light transmittance of the multilayer co-extrusion film layer, and improve the durability in the range of 135-150 ℃.
In a specific embodiment, the ETFE film layer is adhered to the multilayer co-extruded film layer by using a glue coating process, and the adhesive needs to be selected by comprehensively considering factors such as adhesive effect, adhesive life, light transmittance and the like, so that the preferred adhesive of the utility model comprises modified EAA (ethylene acrylic acid copolymer, EAA for short), modified EVA (ethylene and vinyl acetate copolymer, EVA for short) and the like, and more preferably adopts modified EAA, the thickness is preferably 2-5 μm, the light transmittance is too thick, and the adhesive effect is too thin; the modified EAA hot melt adhesive is obtained by blending and modifying EAA, a cross-linking agent and an ultraviolet blocking agent; the modified EVA hot melt adhesive is obtained by blending and modifying EVA, a cross-linking agent and ultraviolet blocking; in the adhesive, the cross-linking agent is used for curing the hot melt adhesive so as to improve the temperature resistance of the hot melt adhesive to meet the requirement of the lamination use temperature of the photovoltaic panel material of 110-135 ℃, and the ultraviolet blocking agent is used for ultraviolet rays.
In summary, the composite film formed by compounding the ETFE film layer and the PE/EVOH/PE three-layer co-extrusion film layer is applied to panel materials, the total thickness of the composite film is controlled to be 40-50 mu m, high light transmittance can be realized, a long-acting protective effect can be achieved on a photovoltaic module, the oxygen barrier effect is good, and the ageing of an internal adhesive film is effectively prevented; the composite film has high stiffness, can effectively prevent lamination wrinkles during subsequent lamination, has low manufacturing cost, can be widely applied to panel materials of photovoltaic modules, and is particularly suitable for being applied to folding type flexible panel materials.
The foregoing description of the preferred embodiments of the utility model is not intended to limit the scope of the utility model, but rather to cover any modifications, equivalents, improvements or the like within the spirit and scope of the present utility model.
Claims (8)
1. The composite film structure for the photovoltaic panel is characterized by comprising an ETFE film layer and a plurality of co-extrusion film layers, wherein the ETFE film layer is glued to the plurality of co-extrusion film layers;
the multilayer co-extrusion film layer comprises a base layer and a functional layer, wherein the base layer is formed on two sides of the functional layer, the functional layer is an EVOH film layer, and the base layer is a PE film layer;
the thickness of the composite film for the photovoltaic panel is 40-50 mu m.
2. The composite film structure for a photovoltaic panel according to claim 1, wherein the ETFE thin film layer has a thickness of 15 to 20 μm.
3. The composite film structure for a photovoltaic panel according to claim 1, wherein the thickness of the multilayer coextruded film layer is 20 to 30 μm.
4. The composite film structure for a photovoltaic panel according to claim 3, wherein the EVOH film layer has a thickness of 10 to 15 μm and the PE film layer has a thickness of 5 to 10 μm.
5. The composite film structure for a photovoltaic panel according to claim 1, wherein the thickness of the adhesive layer between the ETFE film layer and the multilayer coextruded film layer is 2 to 5 μm.
6. The composite film structure for a photovoltaic panel according to claim 5, wherein the adhesive layer is made of a modified EAA hot melt adhesive or a modified EVA hot melt adhesive.
7. The composite film structure for a photovoltaic panel of claim 1, wherein the multilayer coextruded film layer is obtained by a multilayer coextrusion blow molding process.
8. The composite film structure for a photovoltaic panel according to claim 1, wherein the ETFE film layer is glued to the multilayer coextruded film layer by a size coating process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321690168.0U CN220447401U (en) | 2023-06-29 | 2023-06-29 | Composite film structure for photovoltaic panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321690168.0U CN220447401U (en) | 2023-06-29 | 2023-06-29 | Composite film structure for photovoltaic panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220447401U true CN220447401U (en) | 2024-02-06 |
Family
ID=89726556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321690168.0U Active CN220447401U (en) | 2023-06-29 | 2023-06-29 | Composite film structure for photovoltaic panel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220447401U (en) |
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2023
- 2023-06-29 CN CN202321690168.0U patent/CN220447401U/en active Active
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