CN211542697U

CN211542697U - Transparent sheet

Info

Publication number: CN211542697U
Application number: CN201921249192.4U
Authority: CN
Inventors: 王佩刚; 林玉光; 魏家靖; 顾方明
Original assignee: Hangzhou Foremost Material Technology Co ltd
Current assignee: Hangzhou Foremost Material Technology Co ltd
Priority date: 2019-08-02
Filing date: 2019-08-02
Publication date: 2020-09-22
Anticipated expiration: 2029-08-02

Abstract

The utility model provides a transparent sheet includes transparent surface film layer, transparent adhesive layer, transparent substrate layer and fluorocarbon resin coating, transparent adhesive layer is located transparent surface film layer with between the transparent substrate layer, transparent substrate layer is located transparent adhesive layer with between the fluorocarbon resin coating, transparent surface film layer includes the first fluorine rete of surface course, surface course intermediate level and surface course second fluorine rete, the surface course intermediate level is located the first fluorine rete of surface course with between the surface course second fluorine rete, surface course second fluorine rete is located the surface course intermediate level with between the first transparent adhesive layer, the surface course intermediate level comprises the membrane including PVDF and reinforcing resin, the thickness more than or equal to in surface course intermediate level the thickness of the first fluorine rete of surface course, the thickness more than or equal to in surface course intermediate level the thickness of surface course second fluorine rete.

Description

Transparent sheet

[ technical field ] A method for producing a semiconductor device

The utility model relates to a photovoltaic field, concretely relates to transparent sheet.

[ background of the invention ]

The solar cell mainly comprises a front plate, a polymer adhesive film, a solar cell piece and a back plate, wherein the front plate is toughened glass with high light transmittance, the solar cell piece is encapsulated by EVA, and the back plate mainly plays roles in blocking water vapor and oxygen, mechanically protecting and insulating. At present, the more used solar cell back panels are milky white solar cell back panels, and with the development of the photovoltaic industry, higher power generation efficiency is required, double-sided batteries are produced at the same time, the milky white solar cell back panels cannot be suitable for the double-sided batteries, and transparent back panels are produced for the double-sided batteries. On the other hand, the transparent sheet can also be applied to a solar cell front plate to replace toughened glass, so that the photovoltaic module can be lightened.

[ Utility model ] content

An object of the utility model is to provide a higher transparent sheet of luminousness.

In order to realize the purpose, the following technical scheme is adopted:

the utility model provides a transparent sheet includes transparent surface film layer, transparent adhesive layer, transparent substrate layer and fluorocarbon resin coating, transparent adhesive layer is located transparent surface film layer with between the transparent substrate layer, transparent substrate layer is located transparent adhesive layer with between the fluorocarbon resin coating, the thickness more than or equal to of transparent surface film layer the thickness of fluorocarbon resin coating, transparent surface film layer includes first fluorine rete of surface course, surface course intermediate level and surface course second fluorine rete, the surface course intermediate level is located first fluorine rete of surface course with between the surface course second fluorine rete, the surface course second fluorine rete is located the surface course intermediate level with between the transparent adhesive layer.

In one embodiment, the thickness of the surface layer intermediate layer is greater than or equal to the thickness of the surface layer first fluorine film layer, the thickness of the surface layer intermediate layer is greater than or equal to the thickness of the surface layer second fluorine film layer, the thickness of the transparent sheet material is greater than or equal to 100 micrometers, the thickness of the transparent surface film layer is greater than or equal to 10 micrometers, and the thickness of the fluorocarbon resin coating layer is greater than or equal to 10 micrometers.

In one embodiment, the thickness of the surface layer intermediate layer is greater than or equal to the thickness of the surface layer first fluorine film layer, the thickness of the surface layer intermediate layer is greater than or equal to the thickness of the surface layer second fluorine film layer, the thickness of the transparent sheet material is greater than or equal to 100 micrometers, the thickness of the transparent surface film layer is greater than or equal to 10 micrometers, and the thickness of the fluorocarbon resin coating is 5-25 micrometers.

As an embodiment, the face layer intermediate layer is composed of a film comprising PVDF and a reinforcing resin, and the ratio of the thickness of the face layer first fluorine film layer to the thickness of the face layer intermediate layer is (0.5-1.5): (2-5).

As an embodiment, the face layer intermediate layer is composed of a film comprising PVDF and a reinforcing resin, and the ratio of the thickness of the face layer intermediate layer to the thickness of the face layer second fluorine film layer is (2-5): (0.25-1.5).

As an embodiment, the transparent substrate layer is a transparent PET substrate layer or a transparent PP substrate layer, or a transparent PC substrate layer, or a transparent PBT substrate layer, or a transparent COC substrate layer, or a transparent TPX substrate layer, or a transparent PMMA substrate layer, the thickness of the transparent substrate layer is greater than or equal to 40 micrometers, the thickness of the transparent adhesive layer is greater than or equal to 5 micrometers, and the transparent adhesive layer is made of at least one of an acrylic adhesive, a polyurethane adhesive, an epoxy resin adhesive, and an ethylene-vinyl acetate adhesive.

As an implementation manner, the light transmittance of the transparent sheet material for light of 380-1100nm is greater than or equal to 85%, the PVDF content of the first fluorine film layer of the surface layer is greater than the PVDF content of the middle layer of the surface layer, the PVDF content of the first fluorine film layer of the surface layer is greater than the PVDF content of the second fluorine film layer of the surface layer, the content of PVDF content in the middle layer of the surface layer enhances the resin content, the thickness of the first fluorine film layer of the surface layer is 2-30 micrometers, the thickness of the middle layer of the surface layer is 5-30 micrometers, the thickness of the transparent substrate layer is 10-290 micrometers, the thickness of the second fluorine film layer of the surface layer is 2-30 micrometers, and the thickness of the transparent adhesive layer is 5-10 micrometers.

In one embodiment, the transmittance of the transparent sheet material relative to light of 380-1100nm is greater than or equal to 85%, and the thickness ratio of the surface layer first fluorine film layer to the surface layer middle layer is 1: (2-4), the thickness ratio of the second fluorine film layer of the surface layer to the middle layer of the surface layer is 1: (2-4), the thickness of the transparent substrate layer is 40-280 microns.

In one embodiment, the thickness of the transparent sheet is greater than or equal to 125 micrometers, the transmittance of the transparent sheet with respect to light of 380-1100nm is greater than or equal to 88%, the thickness of the first fluorine film layer of the surface layer is 2-10 micrometers, the thickness of the middle layer of the surface layer is 5-30 micrometers, and the thickness of the second fluorine film layer of the surface layer is 2-10 micrometers.

Among the above-mentioned technical scheme, transparent surface film layer, transparent adhesive layer, transparent substrate layer and fluorocarbon resin coating all are the stratum lucidum, and its luminousness is all higher, and consequently this technical scheme's transparent sheet's luminousness is higher, is favorable to increasing solar cell system's photic rate in the use to be favorable to improving solar cell system's efficiency, be favorable to the energy can be saved, and this transparent sheet's weatherability is better. On the other hand, transparent surface film layer includes first fluorine rete of surface course, surface course intermediate level and surface course second fluorine rete, and this first fluorine rete of surface course has effects such as salt spray resistant, ultraviolet ageing resistant, chemical resistance, and it has the guard action to transparent sheet, and the surface course intermediate level is the supporting layer, has the skeleton effect, and the surface course second fluorine rete has the effect of improving the adhesive force. The layering protection of the transparent surface film layer and the synergistic effect between layers increase the performance of the transparent surface film layer, and are beneficial to preventing the transparent layer from layering or peeling and cracking in the using process of the transparent sheet.

[ description of the drawings ]

Fig. 1 is a schematic structural diagram of an embodiment of the transparent sheet of the present invention.

[ detailed description ] embodiments

Referring to fig. 1, fig. 1 is a schematic diagram of an embodiment of a transparent sheet according to the present invention. The transparent sheet comprises a transparent surface film layer, a transparent adhesive layer 2, a transparent substrate layer 3 and a fluorocarbon resin coating 4, wherein the transparent adhesive layer 2 is positioned between the transparent surface film layer and the transparent substrate layer 3, the thickness of the transparent surface film layer is more than or equal to that of the fluorocarbon resin coating 4, and the transparent substrate layer 3 is positioned between the transparent adhesive layer 2 and the fluorocarbon resin coating 4. The transparent surface layer 1, the transparent adhesive layer 2, the transparent substrate layer 3 and the fluorocarbon resin coating 4 are all transparent, or the light transmittance of the transparent surface layer, the transparent adhesive layer, the transparent substrate layer and the fluorocarbon resin coating 4 to the light with the wavelength of 380-1100nm is more than 85%, so that the transparent sheet is also transparent, or the light transmittance of the transparent sheet to the light with the wavelength of 380-1100nm is more than or equal to 85%, is more than 85%. The fluorocarbon resin coating in the present application may be a FEVE (fluoroolefin-vinyl ether copolymer) coating or a PVDF (polyvinylidene fluoride) coating, and may also be a THV (polymer of tetrafluoroethylene, hexafluoropropylene, and vinylidene fluoride) coating or a fluoroacrylic coating, and the above fluorocarbon resin coating is a clear coating. The transparent sheet can be used as a front plate, a back plate and the like of a flexible component, and is favorable for increasing the overall light transmittance of the solar cell and the light receiving rate of the cell, so that the generating efficiency of the solar cell is increased, and resources can be saved. The thickness of the transparent sheet is greater than or equal to 100 micrometers, specifically, the thickness of the transparent sheet is greater than or equal to 125 micrometers, and more specifically, the thickness of the transparent sheet is between 125 micrometers and 300 micrometers.

The transparent surface film layer comprises a surface layer first fluorine film layer 11, a surface layer middle layer 12 and a surface layer second fluorine film layer 13, wherein the surface layer middle layer 12 is positioned between the surface layer first fluorine film layer 11 and the surface layer second fluorine film layer 13, and the surface layer second fluorine film layer 13 is positioned between the surface layer middle layer and the transparent adhesive layer 2. The surface layer first fluorine film layer 11 is mainly composed of a fluorine-containing resin, for example, the surface layer first fluorine film layer 11 is composed of a film layer including PVDF, and the content of PVDF is 90% or more. The first fluorine rete 11 of surface course is located the outside of transparent sheet, or can say that the transparent sheet assembles when solar PV modules, 11 direct contact air of the first fluorine rete of surface course, and 11 salt fog resistant, chemical corrosion resistant, ageing-resistant, the advantage such as resistant ultraviolet of the first fluorine rete of surface course to make the first fluorine rete of surface course 11 have the guard action to transparent sheet or can say that 11 solar module of the first fluorine rete of surface course. The thickness of the surface layer first fluorine film layer 11 is 2 micrometers or more, more specifically, the thickness of the surface layer first fluorine film layer 11 is 2 to 30 micrometers, and more specifically, the thickness of the surface layer first fluorine film layer 11 is 2 to 10 micrometers. When the thickness of the surface layer first fluorine film layer 11 is too small, the protective effect cannot be achieved, and when the thickness of the surface layer first fluorine film layer 11 is too large, the cost performance of the transparent sheet is not high, so that the appropriate thickness of the surface layer first fluorine film layer 11 is required.

The surface layer intermediate layer 12 is mainly composed of a fluorine-containing resin and a reinforcing resin, or the surface layer intermediate layer 12 can be said to be composed of a film including PVDF and a reinforcing resin, wherein the reinforcing resin is a homopolymer or a copolymer of methyl methacrylate, for example, the surface layer intermediate layer 12 is composed of a film including PVDF and polymethyl methacrylate, wherein the content of PVDF is equal to or greater than the content of polymethyl methacrylate, and the content of PVDF is equal to or greater than 70%. The surface layer intermediate layer 12 is located on the inner side of the surface layer first fluorine film layer 11, or the surface layer intermediate layer 12 is closer to the cell than the surface layer first fluorine film layer 11 after assembly. The thickness of the first fluorine rete 11 of thickness more than or equal to surface course in surface course intermediate level 12, the thickness of the second fluorine rete 13 of thickness more than or equal to surface course intermediate level 12, surface course intermediate level 12 plays the supporting role to transparent surface film layer, in addition, can add UV separation agent etc. to surface course intermediate level and improve transparent sheet's anti UV performance. When the thickness of the surface layer intermediate layer 12 is too small, it cannot play a supporting role, and when the thickness of the surface layer intermediate layer is too large, the cost performance of the transparent sheet is not high, so that the thickness of the surface layer intermediate layer is 5 micrometers or more, more specifically, the thickness of the surface layer intermediate layer 12 is 5 to 30 micrometers.

The transparent mask layer further includes a surface layer, a second fluorine film layer 13, the surface layer, the second fluorine film layer 13 is mainly made of fluorine-containing resin, for example, the surface layer, the second fluorine film layer 13 is made of a film including PVDF and polymethyl methacrylate, and the content of PVDF is greater than or equal to 60%. The surface layer second fluorine film layer 13 contacts with the transparent adhesive layer 2, or the surface layer second fluorine film layer 13 can be said to be attached to the transparent adhesive layer 2. The surface layer second fluorine film layer 13 has functions of improving the adhesive force of the transparent sheet material, protecting UV, and the like, and cannot perform the above-described functions when the thickness of the surface layer second fluorine film layer 13 is too small, and the performance ratio of the transparent sheet material is not high when the thickness of the surface layer second fluorine film layer 13 is too large, so that the thickness of the surface layer second fluorine film layer is 2 micrometers or more, and more specifically, the thickness of the surface layer second fluorine film layer 13 is 2 to 30 micrometers.

The first fluorine rete 11 of surface course, surface course intermediate level 12 and surface course second fluorine rete 13 have the synergism between them to make transparent surface film layer have better functions such as chemical resistance, ultraviolet ageing resistant, salt fog resistant, anti UV protection, for making the synergism between them better and transparent sheet have better price/performance ratio, the thickness ratio of the thickness 11 of surface course first fluorine rete and surface course intermediate level is (0.5-1.5): (2-5); the ratio of the thickness 12 of the surface layer middle layer to the thickness of the surface layer second fluorine film layer 13 (2-5): (0.25-1.5). For example, the thicknesses of the surface layer first fluorine film layer 11, the surface layer intermediate layer 12, and the surface layer second fluorine film layer 13 are: 2. 6 and 2 microns.

Referring to fig. 1, the transparent sheet 2 includes a transparent adhesive layer 2, wherein the transparent adhesive layer 2 is used for bonding the transparent surface film layer and the transparent substrate layer 3, or the transparent adhesive layer 2 bonds and fixes the transparent surface film layer and the transparent substrate layer 3 into a whole; the transparent adhesive layer 2 is made of at least one of acrylic adhesive, polyurethane adhesive, epoxy resin adhesive and ethylene-vinyl acetate adhesive. When the thickness of the transparent adhesive layer 2 is too small, the adhesive function cannot be achieved, and when the thickness of the transparent adhesive layer 2 is too large, the cost performance of the transparent sheet is not high, so that the thickness of the transparent adhesive layer 2 is greater than or equal to 5 micrometers, and more specifically, the thickness of the transparent adhesive layer is 5-10 micrometers.

Referring to fig. 1, the transparent sheet includes a transparent substrate layer 3, the transparent substrate layer 3 is located between the transparent adhesive layer 2 and the second transparent adhesive layer 3, the transparent substrate layer 3 has an insulation protection effect on the solar cell module, the transparent substrate layer 3 may be one of a transparent PET substrate layer, a transparent PP substrate layer, a transparent PC substrate layer, a transparent PBT substrate layer, a transparent COC substrate layer, a transparent TPX substrate layer, or a transparent PMMA substrate layer, where PET refers to poly (terephthalic acid), PP refers to polypropylene, PC refers to polycarbonate, PBT refers to polybutylene terephthalate, COC refers to TPX refers to poly (4-methyl-1-pentene), and PMMA refers to polymethyl methacrylate. The above kinds of transparent substrate layers shall mean transparent substrate layers mainly composed of the above materials, and not merely mean that only the above kinds of materials are contained in the transparent substrate layers. In order to ensure the insulating function of the transparent substrate layer 3, the thickness of the transparent substrate layer 3 is more than or equal to 40 micrometers. The main role of the transparent substrate layer 3 in the solar cell system is an insulating role, and the thickness of the transparent substrate layer 3 is related to the breakdown voltage, specifically, the thickness of the transparent substrate layer is equal to or greater than 30 micrometers, more specifically, the thickness of the transparent substrate layer 3 is 10 to 290 micrometers, and more specifically, the thickness of the transparent substrate layer 3 is 40 to 280 micrometers. More specifically, the thickness of the transparent base material layer 3 is 100 μm or more. The transparent adhesive layer 2 and the second transparent adhesive layer 4 can have the functions of UV blocking, humidity resistance, heat resistance, ultraviolet radiation resistance and the like.

Referring to fig. 1, the transparent sheet includes a fluorocarbon resin coating 4, and when the solar cell module is assembled, the fluorocarbon resin coating 4 is located on the inner side of the transparent substrate layer, or in other words, the fluorocarbon resin coating 4 is closer to the cell than the transparent substrate layer 3. The fluorocarbon resin layer 4 has the effects of aging resistance, water vapor resistance and the like, the thickness of the fluorocarbon resin coating 4 is generally more than or equal to 10 micrometers, specifically, the thickness of the fluorocarbon resin coating 4 is 5-25 micrometers, the thickness of the fluorocarbon resin coating 4 is too small to have the effects of aging resistance, water vapor resistance and the like, and when the thickness of the fluorocarbon resin coating 4 is too large, the cost performance of the transparent sheet is not high, so the fluorocarbon resin coating 4 should have the appropriate thickness.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a transparent sheet, includes transparent substrate layer, its characterized in that, transparent sheet still includes transparent surface film layer, transparent adhesive layer and fluorocarbon resin coating, transparent adhesive layer is located transparent surface film layer with between the transparent substrate layer, transparent substrate layer is located transparent adhesive layer with between the fluorocarbon resin coating, transparent surface film layer's thickness more than or equal to fluorocarbon resin coating's thickness, transparent surface film layer includes first fluorine rete of surface course, surface course intermediate level and surface course second fluorine rete, the surface course intermediate level is located first fluorine rete of surface course with between the surface course second fluorine rete, surface course second fluorine rete is located the surface course intermediate level with between the transparent adhesive layer.

2. The transparent sheet according to claim 1, wherein the thickness of the surface intermediate layer is equal to or greater than the thickness of the first fluorine film layer of the surface, the thickness of the surface intermediate layer is equal to or greater than the thickness of the second fluorine film layer of the surface, the thickness of the transparent sheet is equal to or greater than 100 micrometers, the thickness of the transparent surface film layer is equal to or greater than 10 micrometers, and the thickness of the fluorocarbon resin coating layer is equal to or greater than 10 micrometers.

3. The transparent sheet of claim 1, wherein the thickness of the surface layer intermediate layer is equal to or greater than the thickness of the surface layer first fluorine film layer, the thickness of the surface layer intermediate layer is equal to or greater than the thickness of the surface layer second fluorine film layer, the thickness of the transparent sheet is equal to or greater than 100 microns, the thickness of the transparent surface film layer is equal to or greater than 10 microns, and the thickness of the fluorocarbon resin coating is 5-25 microns.

4. The transparent sheet according to claim 1, 2 or 3, wherein the ratio of the thickness of the top layer first fluorine film layer to the thickness of the top layer intermediate layer is (0.5-1.5): (2-5).

5. The transparent sheet of any one of claims 1, 2 or 3, wherein the ratio of the thickness of the facing intermediate layer to the thickness of the facing second fluorine film layer is (2-5): (0.25-1.5).

6. The transparent sheet according to claim 5, wherein the transparent substrate layer is a transparent PET substrate layer or a transparent PP substrate layer, or a transparent PC substrate layer, or a transparent PBT substrate layer, or a transparent COC substrate layer, or a transparent TPX substrate layer, or a transparent PMMA substrate layer, the transparent substrate layer has a thickness of 40 micrometers or more, and the transparent adhesive layer has a thickness of 5 micrometers or more.

7. The transparent sheet according to claim 1, wherein the transparent sheet has a transmittance of 85% or more for light having a wavelength of 380-1100nm, the thickness of the first fluorine film layer of the surface layer is 2-30 μm, the thickness of the middle layer of the surface layer is 5-30 μm, the thickness of the transparent substrate layer is 10-290 μm, the thickness of the second fluorine film layer of the surface layer is 2-30 μm, and the thickness of the transparent adhesive layer is 5-10 μm.

8. The transparent sheet of claim 1, wherein the transparent sheet has a transmittance of 85% or more with respect to light of 380-1100nm, and the thickness ratio of the first fluorine film layer of the surface layer to the intermediate layer of the surface layer is 1: (2-4), the thickness ratio of the second fluorine film layer of the surface layer to the middle layer of the surface layer is 1: (2-4), the thickness of the transparent substrate layer is 40-280 microns.

9. The transparent sheet of claim 1, wherein the thickness of the transparent sheet is 125 μm or more, the transmittance of the transparent sheet with respect to 380-1100nm light is 88% or more, the thickness of the first fluorine film layer of the surface layer is 2-10 μm, the thickness of the middle layer of the surface layer is 5-30 μm, and the thickness of the second fluorine film layer of the surface layer is 2-10 μm.