CN102420264B - Solar cell back plate and preparation method thereof - Google Patents
Solar cell back plate and preparation method thereof Download PDFInfo
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Abstract
The invention relates to the technical field of solar photovoltaic cells, in particular to a solar cell back plate and a preparation method thereof. In order to overcome the defects of higher production cost and complicated production process of the existing solar cell back plate, the invention provides the solar cell back plate and the preparation method thereof. The solar cell back plate provided by the invention structurally and sequentially comprises a weather resistance layer, a structure reinforcing layer and a blocking layer, only the three-layer structure is adopted, but the weather resistance and the blocking performance are better, the production cost is lower, the fluorine element is not contained, and the environment pollution cannot be caused. The preparation method of the solar cell back plate provided by the invention comprises three-layer coextrusion and two-way stretch process, the production process of the method is simple, and the implementation is easy.
Description
Technical field
The present invention relates to the solar-energy photo-voltaic cell technical field, especially relate to a kind of solar cell backboard and preparation method thereof.
Background technology
Solar energy has been subject to people's extensive concern as a kind of cleaning, pollution-free, the inexhaustible energy.Solar cell is solar energy directly to be changed into the effective tool of electric energy.Because solar cell needs for a long time at the outdoor rainwater that is subjected to, the erosion of the natural causes such as ultraviolet ray, very unfavorable to the useful life of cell panel.So how to improve the weatherability of solar cell backboard, it is the emphasis of current research.Current main flow backboard be the backboard of the THV/PET/EVA structure that contains THV (hexafluoropropylene (HFP)/tetrafluoroethylene (TFE)-vinylidene) fluororesin of the TPT of Isovolta company in TPE, Europe of U.S. Madico company and the independent research of Japanese 3M company.Also there are many companies to adopt some fluorine materials such as PVDF (vinylidene), ETFE (ethylene tetrafluoroethylene copolymer) to prepare solar cell backboard (can be called for short the solar energy backboard), but on structure, substantially all be that TPT or TPE are main, because the fluorine material surface energy is very low, be difficult to and polyester binding.Therefore need to complete the surface modification of fluorine film, conventional method is at polyester film surface-coated binding agent, and obviously technique is more complicated, and the thickness of tack coat is difficult to be controlled.In addition, the fluorine material is not only expensive but also can be to environment as weathering layer; In addition, use for a long time tack coat lamination easily to occur.
The solar energy industry of China is risen more late, but development rapidly, and the research of solar cell backboard has also been obtained very large achievement.But still there is no too large breakthrough aspect technology.
The application number of Shanghai Hiuv Electronic Technology Co., Ltd. is 200810204220.0 (publication No.: CN101431108A, date of publication: Chinese patent application on May 13rd, 2009) has been reported a kind of solar energy backboard, it is characterized in that this backboard is made of weather-proof and aqueous vapor separation layer (10-40 μ m), ultraviolet isolating layer (15-100 μ m), enhancement layer (125-250 μ m) and reflection and tack coat (20-100 μ m).Wherein weathering layer is the fluorine material, and enhancement layer is polyester film, and the reflector is polythene material.This backboard adopts the method for MULTILAYER COMPOSITE can effectively improve the barrier of backboard, but is still bonding with binding agent between layers, and weathering layer also still use be the fluorine material.So production cost is higher, technology difficulty is larger, and environment is had pollution and is unfavorable for long-time use.
The application number of material limited company of the high section of Nanjing Na Quan is 200910167211.3 (publication No.: CN101997038A, date of publication: Chinese patent application on March 30th, 2011) has also been reported a kind of sun backboard, at least one side of this backboard base material is provided with fluorine material weathering layer, the opposite side of base material is provided with the inorganic material barrier layer, adopts between layers tack coat settable cementitious.This backboard still can't be avoided improving weatherability and tack coat bond weathering layer and base material with the fluorine material.Although simplified the compound number of plies, still need binding agent between layer, therefore also exist technique, Cost Problems and useful life problem.
The application number of too red science and technology (Kunshan) Co., Ltd is 201020544571.9 (patent announcement number: CN201804884U, the day for announcing: Chinese patent application on April 20th, 2011) has reported that equally a kind of compound method of plural layers that adopts improves the barrier property of backboard and improves weatherability with the fluorine material, but has equally the problem in above patent application.
Summary of the invention
Higher in order to solve existing solar cell backboard production cost, the defective of complex manufacturing.The invention provides a kind of solar cell backboard and preparation method thereof.
Compared with prior art, solar cell backboard long service life provided by the invention does not contain fluorine element, has saved production cost, can not cause environmental pollution yet, and weatherability and barrier better; The preparation method of solar cell backboard provided by the invention comprises three-layer co-extrudedly going out and stretch processes that the method production technology is simple, is easy to realize, production efficiency is high.
In order to achieve the above object, the invention provides following technical proposals:
A kind of solar cell backboard, its feature are that described solar cell backboard comprises weathering layer, structural reinforcing layer and barrier layer successively.
Further, the component of described weathering layer comprises polyester material and function additive; The component of described structural reinforcing layer comprises polyester material, inorganic pigment and function additive; The component of described barrier layer comprises resin material and function additive.
Further, the polyester material that comprises of described weathering layer is PETG-Isosorbide-5-Nitrae cyclohexanedimethanoester ester (PETG); The polyester material that described structural reinforcing layer comprises is PETG (PET); The resin material that described barrier layer comprises is ethylene-vinyl alcohol copolymer (EVOH).
Described PETG-Isosorbide-5-Nitrae cyclohexanedimethanoester ester (PETG) density is 1.29-1.40g/cm
3, relative molecular weight is 15000-18000, inherent viscosity is 0.52-0.62dl/g.PETG-Isosorbide-5-Nitrae cyclohexanedimethanoester ester (PETG) has very outstanding weatherability, can keep for a long time the toughness of material, prevents xanthochromia, and the PETG stable chemical nature, is therefore the excellent material of weathering layer.
Described PETG (PET) is biaxially oriented polyester film (BOPET), and the relative molecular weight of PET section used is 16000-18000, and density is 1.38-1.40g/cm
3, inherent viscosity is 0.52-0.65dl/g, vitrification point is 82 ℃.
The relative molecular weight of described ethylene-vinyl alcohol copolymer (EVOH) is between 12000-15000.
Further, described function additive comprises antioxidant and uvioresistant stabilizer, and described inorganic pigment is white inorganic pigment.
Above-mentioned antioxidant is aromatics antioxidant, can be the combination of a kind of in diphenylamines, p-phenylenediamine (PPD), dihydroquinoline and derivative thereof or compound or at least two kinds.
Above-mentioned uvioresistant stabilizer is salicylate class, benzophenone class, benzotriazole, group-substituted acrylonitrile, triazines, hindered amines or its combination.Can be phenyl salicytate, Ultraviolet Absorber UV-P, ultra-violet absorber UV-O, ultra-violet absorber UV-9, ultraviolet absorbent UV-531, ultra-violet absorber UVP-327, light stabilizer-744 or its combination.
Above-mentioned white inorganic pigment is one or more in titanium dioxide, barium sulfate, calcium carbonate, silicon dioxide, aluminium oxide, and better described white inorganic pigment is titanium dioxide or barium sulfate.The particle diameter of described white inorganic pigment can be 0.2-0.3um.
Further, in described weathering layer: described antioxidant accounts for the 1%-5% of described weathering layer total weight, and described uvioresistant stabilizer accounts for the 0.5%-2% of described weathering layer total weight; In described structural reinforcing layer: described antioxidant accounts for the 1%-5% of described structural reinforcing layer total weight, described uvioresistant stabilizer accounts for the 0.5%-2% of described structural reinforcing layer total weight, and described white inorganic pigment accounts for the 10%-30% of described structural reinforcing layer total weight; In described barrier layer: described antioxidant accounts for the 1%-5% of described barrier layer total weight, and described uvioresistant stabilizer accounts for the 0.5%-2% of described barrier layer total weight.
The thickness of described weathering layer, structural reinforcing layer, barrier layer can be regulated as required, as long as within die head caliber size scope.
Further, described ethylene-vinyl alcohol copolymer contains the ethene that weight percentage is 20%-40%.Ethylene contents is too high is conducive to processing, but is unfavorable for the barrier of this material; Ethylene contents is too low opposite.
Further, the thickness of described weathering layer is the 10-100 micron, and the thickness of described structural reinforcing layer is the 150-350 micron, and the thickness of described barrier layer is the 10-100 micron.
The present invention also provides a kind of preparation method of solar cell backboard, and described preparation method comprises the steps:
(1), the each component of described weathering layer mixes, and makes mixed plastic A; The each component of described structural reinforcing layer mixes, and makes mixed plastic B; The each component of described barrier layer mixes, and makes mixed plastic C; The each component of above-mentioned each layer can mix by high mixer respectively.
(2), the prepared three kinds of mixed plastics of step (1) are carried out respectively fusion plastification, the melt of gained enters the three-layer co-extruded die head that goes out machine, coex composite membranes by distributor;
(3), with step (2) gained laminated film, by cooling, slab, stretch processes, make three-layer co-extruded film, cut described film, make described solar cell backboard.
Described laminated film carries out biaxial tension in the static stretch machine, draft temperature is controlled at 80-120 ℃.
The present invention also provides a kind of solar cell, comprises above-mentioned solar cell backboard.
The present invention also provides a kind of solar cell, comprises solar cell backboard, and described solar cell backboard adopts above-mentioned preparation method to be prepared from.
Further, the thickness of described weathering layer is the 40-60 micron, and the thickness of described structural reinforcing layer is the 200-250 micron, and the thickness of described barrier layer is the 40-60 micron.
Further, the thickness of described weathering layer is the 10-50 micron, and the thickness of described structural reinforcing layer is the 150-250 micron, and the thickness of described barrier layer is the 10-50 micron.
Further, the thickness of described weathering layer is the 50-100 micron, and the thickness of described structural reinforcing layer is the 250-350 micron, and the thickness of described barrier layer is the 50-100 micron.
Further, the thickness of described weathering layer is the 10-50 micron, and the thickness of described structural reinforcing layer is the 150-350 micron, and the thickness of described barrier layer is the 50-100 micron.
Further, the thickness of described weathering layer is the 20-80 micron, and the thickness of described structural reinforcing layer is the 150-250 micron, and the thickness of described barrier layer is the 50-100 micron.
Further, the thickness of described weathering layer is the 20-80 micron, and the thickness of described structural reinforcing layer is the 180-300 micron, and the thickness of described barrier layer is the 20-80 micron.
Compare with existing solar cell backboard, solar cell backboard provided by the invention is three-layer coextru-laminated film, only has three layers, and is simple in structure and be conducive to save cost.Between layers without any binding agent, but combine by the method for melting co-extrusion, this associated methods is not significantly boundary between layers, be not prone to lamination, be conducive to improve useful life, and production technology be simple, production efficiency is high, helps simultaneously to save cost.Do not contain fluorine element in this backboard weathering layer used, not only greatly save production cost, and can not pollute environment yet.Solar cell backboard provided by the invention not only has excellent weather resistance, and mechanical strength is also stable, can satisfy the instructions for use of solar energy backboard, and is significant to the solar energy industry.
The preparation method of solar cell backboard provided by the invention comprises three-layer co-extrudedly going out and stretch processes that the method production technology is simple, is easy to realize, production efficiency is high.
Description of drawings
Fig. 1 is solar cell backboard generalized section provided by the invention;
Wherein, 1 is weathering layer, and 2 is the structural reinforcing layer, and 3 is barrier layer.
Embodiment
Below by specific embodiment, solar cell backboard provided by the invention is elaborated.
In the present invention, mixed plastic adopts high mixer to mix, and better, the volume of high mixer is 100L.The coextrusion of three kinds of mixed plastics is to adopt with distributor three-layer co-extruded to go out casting machine.The cooling diameter of using the cold drum of equipment is between 1.2-1.6m, and speed is controlled between 70-100m/min, and cold bulging surface temperature control is between 30-60 ℃.The static stretch machine is adopted in biaxial tension, and the stretching ratio of stretching-machine can be regulated as requested.Other equipment that the present invention relates to are routine instrument device.
As shown in Figure 1, solar cell backboard provided by the invention is the three-layer co-extruded film that goes out, and comprises weathering layer 1, structural reinforcing layer 2 and barrier layer 3.
In following embodiment 1 to embodiment 27: the percentage composition of antioxidant, uvioresistant stabilizer and inorganic pigment is weight percentage, respectively based on the total weight of each layer under it (weathering layer, structural reinforcing layer or barrier layer); The percentage composition of described ethene is weight percentage, based on the weight of EVOH; The main material of described weathering layer is PETG; The main material of described structural reinforcing layer is PET; The main material of described barrier layer is EVOH.The particle diameter of described white inorganic pigment can be 0.2-0.3um.
Embodiment 1:
As shown in Figure 1, weathering layer 1, thickness are 20 microns, and wherein the addition of antioxidant diphenylamines is 1%, and uvioresistant stabilizer UV-P addition is 0.5%, and all the other are PETG; Structural reinforcing layer 2, thickness are 150 microns, and titanium dioxide Chinese white addition is 10%, and antioxidant diphenylamines addition is 1%, and uvioresistant stabilizer UV-P addition is 0.5%, and all the other are PET; Barrier layer 3, thickness are 10 microns, and ethylene contents is 20%, and antioxidant diphenylamines addition is 1%, and uvioresistant stabilizer UV-P addition is 0.5%, and all the other are EVOH.The particle diameter of described titanium dioxide is 0.2um.Relevant parameter sees Table 1.
Concrete preparation method is as follows:
(1), the each component of described weathering layer mixes by the high mixer of 100L, makes mixed plastic A; The each component of described structural reinforcing layer mixes by the high mixer of 100L, makes mixed plastic B; The each component of described barrier layer mixes by the high mixer of 100L, makes mixed plastic C;
(2), the prepared three kinds of mixed plastics of step (1) are added respectively three double screw extruders simultaneously, carry out respectively fusion plastification, the melt of gained enters the three-layer co-extruded die head that goes out machine, coex composite membranes by distributor;
(3), step (2) gained laminated film, by cooling, slab, stretch processes, make three-layer co-extruded film, cut described film, make described solar cell backboard.
Laminated film biaxial tension in the static stretch machine, draft temperature are 80 ℃.
Embodiment 2:
As shown in Figure 1, weathering layer 1, thickness are 30 microns, and wherein the addition of antioxidant diphenylamines is 2%, and uvioresistant stabilizer UV-P addition is 1%, and all the other are PETG; Structural reinforcing layer 2, thickness are 200 microns, and titanium dioxide Chinese white addition is 20%, and antioxidant diphenylamines addition is 2%, and uvioresistant stabilizer UV-P addition is 1%, and all the other are PET; Barrier layer 3, thickness are 20 microns, and ethylene contents is 30%, and antioxidant diphenylamines addition is 2%, and uvioresistant stabilizer UV-P addition is 1%, and all the other are EVOH.The particle diameter of described titanium dioxide is 0.3um.Relevant parameter sees Table 1.
Concrete preparation method is as follows:
The draft temperature of static stretch machine is 85 ℃, and other step is with embodiment 1.
Embodiment 3:
As shown in Figure 1, weathering layer 1, thickness are 50 microns, and wherein the addition of antioxidant diphenylamines is 3%, and uvioresistant stabilizer UV-P addition is 1.5%, and all the other are PETG; Structural reinforcing layer 2, thickness are 250 microns, and titanium dioxide Chinese white addition is 30%, and antioxidant diphenylamines addition is 3%, and uvioresistant stabilizer UV-P addition is 1.5%, and all the other are PET; Barrier layer 3, thickness are 50 microns, and ethylene contents is 40%, and antioxidant is 3% to benzene two ammonium additions, and uvioresistant stabilizer UV-531 addition is 1.5%, and all the other are EVOH.The particle diameter of described titanium dioxide can be 0.25um.Relevant parameter sees Table 1.
Concrete preparation method is as follows:
The preparation method is with embodiment 1, and wherein the draft temperature of static stretch machine is 100 ℃.
Table 1
Annotate: table 1 refers to that to the MD in table 5 vertically TD refers to laterally.
Embodiment 4:
As shown in Figure 1, weathering layer 1, thickness are 100 microns, and wherein antioxidant p-phenylene diamine derivative's addition is 5%, and uvioresistant stabilizer UV-P addition is 2%, and all the other are PETG; Structural reinforcing layer 2, thickness are 350 microns, and barium sulfate Chinese white addition is 30%, and antioxidant p-phenylene diamine derivative addition is 5%, and uvioresistant stabilizer UV-P addition is 2%, and all the other are PET; Barrier layer 3, thickness are 100 microns, and ethylene contents is 40%, and antioxidant diphenylamines addition is 5%, and uvioresistant stabilizer UV-P addition is 2%, and all the other are EVOH.Relevant parameter sees Table 2.
The preparation method is with embodiment 3.
Embodiment 5:
As shown in Figure 1, weathering layer 1, thickness are 55 microns, and wherein the addition of antioxidant diphenylamines is 3%, and uvioresistant stabilizer UV-P addition is 1.2%, and all the other are PETG; Structural reinforcing layer 2, thickness are 250 microns, and calcium carbonate Chinese white addition is 20%, and antioxidant p-phenylenediamine (PPD) addition is 3%, and uvioresistant stabilizer UV-P addition is 1.2%, and all the other are PET; Barrier layer 3, thickness are 55 microns, and ethylene contents is 30%, and antioxidant diphenylamines addition is 3%, and uvioresistant stabilizer UV-P addition is 1.2%, and all the other are EVOH.Relevant parameter sees Table 2.
The preparation method is with embodiment 1, and wherein the draft temperature of static stretch machine is 110 ℃.
Embodiment 6:
As shown in Figure 1, weathering layer 1, thickness are 10 microns, and wherein the addition of antioxidant diphenylamines is 1%, and uvioresistant stabilizer UV-P addition is 0.5%, and all the other are PETG; Structural reinforcing layer 2, thickness are 150 microns, and titanium dioxide Chinese white addition is 10%, and antioxidant diphenylamines addition is 1%, and uvioresistant stabilizer UVP-327 addition is 0.5%, and all the other are PET; Barrier layer 3, thickness are 10 microns, and ethylene contents is 20%, and antioxidant diphenylamines addition is 1%, and uvioresistant stabilizer UV-P addition is 0.5%, and all the other are EVOH.Relevant parameter sees Table 2.
The preparation method is with embodiment 1, and wherein the draft temperature of static stretch machine is 100 ℃.
Embodiment 7:
As shown in Figure 1, weathering layer 1, thickness are 20 microns, and wherein the addition of antioxidant dihydroquindine derivates is 1%, and uvioresistant stabilizer UV-P addition is 0.5%, and all the other are PETG; Structural reinforcing layer 2, thickness are 180 microns, and barium sulfate Chinese white addition is 10%, and antioxidant dihydroquindine derivates addition is 1%, and light stabilizer-744 addition is 0.5%, and all the other are PET; Barrier layer 3, thickness are 20 microns, and ethylene contents is 25%, and antioxidant diphenylamines addition is 1%, and uvioresistant stabilizer UV-P addition is 0.5%, and all the other are EVOH.Relevant parameter sees Table 2.
The preparation method is with embodiment 6.
Embodiment 8:
As shown in Figure 1, weathering layer 1, thickness are 80 microns, and wherein the addition of antioxidant diphenylamines is 5%, and uvioresistant stabilizer phenyl salicytate phenyl salicytate addition is 2%, and all the other are PETG; Structural reinforcing layer 2, thickness are 300 microns, and titanium dioxide Chinese white addition is 30%, and antioxidant diphenylamines addition is 5%, and uvioresistant stabilizer phenyl salicytate phenyl salicytate addition is 2%, and all the other are PET; Barrier layer 3, thickness are 80 microns, and ethylene contents is 40%, and antioxidant barium sulfate addition is 5%, and uvioresistant stabilizer phenyl salicytate addition is 2%, and all the other are EVOH.Relevant parameter sees Table 2.
The preparation method is with embodiment 1, and wherein the draft temperature of static stretch machine is 120 ℃.
Embodiment 9:
As shown in Figure 1, weathering layer 1, thickness are 50 microns, and wherein the addition of antioxidant dihydroquinoline is 3%, and uvioresistant stabilizer UV-P addition is 1.2%, and all the other are PETG; Structural reinforcing layer 2, thickness are 240 microns, and aluminium oxide Chinese white addition is 20%, and antioxidant dihydroquinoline addition is 3%, and uvioresistant stabilizer UV-P addition is 1.2%, and all the other are PET; Barrier layer 3, thickness are 50 microns, and ethylene contents is 32%, and antioxidant diphenylamines addition is 3%, and uvioresistant stabilizer UVP-327 addition is 1.2%, and all the other are EVOH.Relevant parameter sees Table 2.
The preparation method is with embodiment 8.
Table 2
Embodiment 10:
As shown in Figure 1, weathering layer 1, thickness are 40 microns, and wherein the addition of antioxidant diphenylamines is 1%, and uvioresistant stabilizer UVP-327 addition is 0.5%, and all the other are PETG; Structural reinforcing layer 2, thickness are 200 microns, and titanium dioxide Chinese white addition is 10%, and antioxidant diphenylamines addition is 1%, and uvioresistant stabilizer UVP-327 addition is 0.5%, and all the other are PET; Barrier layer 3, thickness are 40 microns, and ethylene contents is 20%, and antioxidant diphenylamines addition is 1%, and uvioresistant stabilizer UVP-327 addition is 0.5%, and all the other are EVOH.Relevant parameter sees Table 3.
The preparation method is with embodiment 8.
Embodiment 11:
As shown in Figure 1, weathering layer 1, thickness are 60 microns, and wherein the addition of antioxidant dihydroquinoline is 5%, and uvioresistant stabilizer UV-P addition is 2%, and all the other are PETG; Structural reinforcing layer 2, thickness are 250 microns, and calcium carbonate Chinese white addition is 30%, and antioxidant dihydroquinoline addition is 5%, and uvioresistant stabilizer UV-P addition is 2%, and all the other are PET; Barrier layer 3, thickness are 60 microns, and ethylene contents is 40%, and antioxidant diphenylamines addition is 5%, and light stabilizer-744 addition is 2%, and all the other are EVOH.Relevant parameter sees Table 3.
The preparation method is with embodiment 1, and wherein the draft temperature of static stretch machine is 90 ℃.
Embodiment 12:
As shown in Figure 1, weathering layer 1, thickness are 50 microns, and wherein the addition of antioxidant diphenylamines is 3%, and uvioresistant stabilizer UV-P addition is 1.5%, and all the other are PETG; Structural reinforcing layer 2, thickness are 230 microns, and silicon dioxide Chinese white addition is 20%, and antioxidant p-phenylenediamine (PPD) addition is 3%, and uvioresistant stabilizer UV-P addition is 1.5%, and all the other are PET; Barrier layer 3, thickness are 50 microns, and ethylene contents is 35%, and antioxidant diphenylamines addition is 3%, and uvioresistant stabilizer UV-P addition is 1.5%, and all the other are EVOH.Relevant parameter sees Table 3.
The preparation method is with embodiment 11.
Embodiment 13:
As shown in Figure 1, weathering layer 1, thickness are 10 microns, and wherein the addition of antioxidant p-phenylenediamine (PPD) is 1%, and uvioresistant stabilizer phenyl salicytate addition is 0.5%, and all the other are PETG; Structural reinforcing layer 2, thickness are 150 microns, and barium sulfate Chinese white addition is 10%, and antioxidant p-phenylenediamine (PPD) addition is 1%, and uvioresistant stabilizer phenyl salicytate addition is 0.5%, and all the other are PET; Barrier layer 3, thickness are 10 microns, and ethylene contents is 20%, and antioxidant diphenylamines addition is 1%, and uvioresistant stabilizer phenyl salicytate addition is 0.5%, and all the other are EVOH.Relevant parameter sees Table 3.
The preparation method is with embodiment 11.
Embodiment 14:
As shown in Figure 1, weathering layer 1, thickness are 50 microns, and wherein the addition of antioxidant diphenylamines is 5%, and uvioresistant stabilizer UVP-327 addition is 2%, and all the other are PETG; Structural reinforcing layer 2, thickness are 250 microns, and titanium dioxide Chinese white addition is 30%, and antioxidant diphenylamines addition is 5%, and uvioresistant stabilizer UVP-327 addition is 2%, and all the other are PET; Barrier layer 3, thickness are 50 microns, and ethylene contents is 40%, and antioxidant diphenylamines addition is 5%, and uvioresistant stabilizer UVP-327 addition is 2%, and all the other are EVOH.Relevant parameter sees Table 3.
The preparation method is with embodiment 1, and wherein the draft temperature of static stretch machine is 105 ℃.
Embodiment 15:
As shown in Figure 1, weathering layer 1, thickness are 30 microns, and wherein the addition of antioxidant diphenylamine derivatives is 3%, and uvioresistant stabilizer UV-O addition is 1.5%, and all the other are PETG; Structural reinforcing layer 2, thickness are 200 microns, and barium sulfate Chinese white addition is 20%, and antioxidant diphenylamine derivatives addition is 3%, and uvioresistant stabilizer UV-O addition is 1.5%, and all the other are PET; Barrier layer 3, thickness are 30 microns, and ethylene contents is 25%, and antioxidant diphenylamine derivatives addition is 3%, and uvioresistant stabilizer UV-O addition is 1.5%, and all the other are EVOH.Relevant parameter sees Table 3.
The preparation method is with embodiment 1, and wherein the draft temperature of static stretch machine is 95 ℃.
Table 3
Embodiment 16:
As shown in Figure 1, weathering layer 1, thickness are 50 microns, and wherein the addition of antioxidant p-phenylenediamine (PPD) is 1%, and uvioresistant stabilizer UV-531 addition is 0.5%, and all the other are PETG; Structural reinforcing layer 2, thickness are 250 microns, and calcium carbonate Chinese white addition is 10%, and antioxidant p-phenylenediamine (PPD) addition is 1%, and uvioresistant stabilizer UV-531 addition is 0.5%, and all the other are PET; Barrier layer 3, thickness are 50 microns, and ethylene contents is 20%, and antioxidant p-phenylenediamine (PPD) addition is 1%, and uvioresistant stabilizer UV-531 addition is 0.5%, and all the other are EVOH.Relevant parameter sees Table 4.
The preparation method is with embodiment 14.
Embodiment 17:
As shown in Figure 1, weathering layer 1, thickness are 100 microns, and wherein the addition of antioxidant dihydroquindine derivates is 5%, and uvioresistant stabilizer UV-O addition is 2%, and all the other are PETG; Structural reinforcing layer 2, thickness are 350 microns, and silicon dioxide Chinese white addition is 30%, and antioxidant dihydroquindine derivates addition is 5%, and uvioresistant stabilizer UV-O addition is 2%, and all the other are PET; Barrier layer 3, thickness are 100 microns, and ethylene contents is 40%, and antioxidant dihydroquindine derivates addition is 5%, and uvioresistant stabilizer UV-O addition is 2%, and all the other are EVOH.Relevant parameter sees Table 4.
The preparation method is with embodiment 15.
Embodiment 18:
As shown in Figure 1, weathering layer 1, thickness are 75 microns, and wherein the addition of antioxidant dihydroquinoline is 3%, and uvioresistant stabilizer phenyl salicytate addition is 1.5%, and all the other are PETG; Structural reinforcing layer 2, thickness are 300 microns, and titanium dioxide Chinese white addition is 20%, and antioxidant dihydroquinoline addition is 3%, and uvioresistant stabilizer phenyl salicytate addition is 1.5%, and all the other are PET; Barrier layer 3, thickness are 75 microns, and ethylene contents is 35%, and antioxidant dihydroquinoline addition is 3%, and uvioresistant stabilizer phenyl salicytate addition is 1.5%, and all the other are EVOH.Relevant parameter sees Table 4.
The preparation method is with embodiment 15.
Embodiment 19:
As shown in Figure 1, weathering layer 1, thickness are 10 microns, and wherein the addition of antioxidant diphenylamines is 1%, and uvioresistant stabilizer UV-9 addition is 0.5%, and all the other are PETG; Structural reinforcing layer 2, thickness are 150 microns, and aluminium oxide Chinese white addition is 10%, and antioxidant diphenylamines addition is 1%, and uvioresistant stabilizer UV-9 addition is 0.5%, and all the other are PET; Barrier layer 3, thickness are 50 microns, and ethylene contents is 20%, and antioxidant diphenylamines addition is 1%, and uvioresistant stabilizer UV-9 addition is 0.5%, and all the other are EVOH.Relevant parameter sees Table 4.
The preparation method is with embodiment 14.
Embodiment 20:
As shown in Figure 1, weathering layer 1, thickness are 50 microns, and wherein the addition of antioxidant diphenylamines is 5%, and uvioresistant stabilizer UV-P addition is 2%, and all the other are PETG; Structural reinforcing layer 2, thickness are 350 microns, and titanium dioxide Chinese white addition is 30%, and antioxidant p-phenylenediamine (PPD) addition is 5%, and uvioresistant stabilizer UV-P addition is 2%, and all the other are PET; Barrier layer 3, thickness are 100 microns, and ethylene contents is 40%, and antioxidant diphenylamines addition is 5%, and uvioresistant stabilizer UV-P addition is 2%, and all the other are EVOH.Relevant parameter sees Table 4.
The preparation method is with embodiment 15.
Embodiment 21:
As shown in Figure 1, weathering layer 1, thickness are 30 microns, and wherein the addition of antioxidant diphenylamine derivatives is 3%, and uvioresistant stabilizer UV-9 addition is 1.5%, and all the other are PETG; Structural reinforcing layer 2, thickness are 250 microns, and titanium dioxide Chinese white addition is 20%, and antioxidant diphenylamine derivatives addition is 3%, and uvioresistant stabilizer UV-9 addition is 1.5%, and all the other are PET; Barrier layer 3, thickness are 75 microns, and ethylene contents is 28%, and antioxidant diphenylamine derivatives addition is 3%, and uvioresistant stabilizer UV-9 addition is 1.5%, and all the other are EVOH.Relevant parameter sees Table 4.
The preparation method is with embodiment 1, and wherein the draft temperature of static stretch machine is 105 ℃.
Table 4
Embodiment 22:
As shown in Figure 1, weathering layer 1, thickness are 20 microns, and wherein the addition of antioxidant p-phenylenediamine (PPD) is 1%, and light stabilizer-744 addition is 0.5%, and all the other are PETG; Structural reinforcing layer 2, thickness are 150 microns, and titanium dioxide Chinese white addition is 10%, and antioxidant p-phenylenediamine (PPD) addition is 1%, and light stabilizer-744 addition is 0.5%, and all the other are PET; Barrier layer 3, thickness are 50 microns, and ethylene contents is 20%, and antioxidant diphenylamines addition is 1%, and light stabilizer-744 addition is 0.5%, and all the other are EVOH.Relevant parameter sees Table 5.
The preparation method is with embodiment 21.
Embodiment 23:
As shown in Figure 1, weathering layer 1, thickness are 80 microns, and wherein the addition of antioxidant diphenylamines is 5%, and uvioresistant stabilizer UV-P addition is 2%, and all the other are PETG; Structural reinforcing layer 2, thickness are 250 microns, and titanium dioxide Chinese white addition is 30%, and antioxidant diphenylamines addition is 5%, and uvioresistant stabilizer UV-P addition is 2%, and all the other are PET; Barrier layer 3, thickness are 100 microns, and ethylene contents is 40%, and antioxidant diphenylamines addition is 5%, and uvioresistant stabilizer UV-P addition is 2%, and all the other are EVOH.Relevant parameter sees Table 5.
The preparation method is with embodiment 21.
Embodiment 24:
As shown in Figure 1, weathering layer 1, thickness are 50 microns, and wherein the addition of antioxidant dihydroquinoline is 3%, and uvioresistant stabilizer UV-P addition is 1.5%; Structural reinforcing layer 2, thickness are 200 microns, and barium sulfate Chinese white addition is 20%, and antioxidant dihydroquinoline addition is 3%, and uvioresistant stabilizer UV-P addition is 1.5%; Barrier layer 3, thickness are 75 microns, and ethylene contents is 35%, and antioxidant diphenylamines addition is 3%, and uvioresistant stabilizer UV-P addition is 1.5%.Relevant parameter sees Table 5.
The preparation method is with embodiment 11.
Embodiment 25:
As shown in Figure 1, weathering layer 1, thickness are 30 microns, and wherein the addition of antioxidant diphenylamines is 2%, and uvioresistant stabilizer UV-P addition is 1%; Structural reinforcing layer 2, thickness are 180 microns, and barium sulfate Chinese white addition is 15%, and antioxidant diphenylamines addition is 2%, and uvioresistant stabilizer UV-P addition is 1%; Barrier layer 3, thickness are 70 microns, and ethylene contents is 25%, and antioxidant diphenylamines addition is 2%, and uvioresistant stabilizer UV-P addition is 1%.Relevant parameter sees Table 5.
The preparation method is with embodiment 15.
Embodiment 26:
As shown in Figure 1, weathering layer 1, thickness are 40 microns, and wherein the addition of antioxidant dihydroquinoline is 4%, and uvioresistant stabilizer UV-P addition is 1.8%; Structural reinforcing layer 2, thickness are 200 microns, and titanium dioxide Chinese white addition is 20%, and antioxidant diphenylamines addition is 4%, and uvioresistant stabilizer UV-P addition is 1.8%; Barrier layer 3, thickness are 50 microns, and ethylene contents is 35%, and antioxidant diphenylamines addition is 4%, and uvioresistant stabilizer UV-P addition is 1.8%.Relevant parameter sees Table 5.
The preparation method is with embodiment 1.
Embodiment 27:
As shown in Figure 1, weathering layer 1, thickness are 70 microns, and wherein the addition of antioxidant diphenylamines is 2%, and uvioresistant stabilizer UV-P addition is 1.2%; Structural reinforcing layer 2, thickness are 250 microns, and titanium dioxide Chinese white addition is 25%, and antioxidant diphenylamines addition is 2%, and uvioresistant stabilizer UV-P addition is 1.2%; Barrier layer 3, thickness are 60 microns, and ethylene contents is 40%, and antioxidant diphenylamines addition is 2%, and uvioresistant stabilizer UV-P addition is 1.2%.Relevant parameter sees Table 5.
The preparation method is with embodiment 3.
Table 5
Can find out 1-5 from table, three-layer co-extruded solar cell backboard provided by the invention on mechanical property with compare more outstandingly with the backboard of binding agent bonding, the highly stable of adhere between layers is described; Remain basically stable with backboard with binding agent on peel strength, illustrate that bond vitrified can substitute the binding agent bonding fully, plays the effect of saving production cost.In addition, can find from water vapor transmittance, although the three-layer co-extruded backboard number of plies is few, simple in structure, not affect water vapor transmittance.So on above performance parameter, not only technique is simple for three-layer co-extruded solar cell backboard provided by the invention, and is with low cost, and stable and reliable for performance, can substitute tradition fully by the backboard of binding agent bonding.
The above is only preferred embodiment of the present invention, is not for limiting protection scope of the present invention.Every equalization that content is done according to the present invention changes and modifies, and all is encompassed in the scope of the claims of the present invention.
Claims (4)
1. a solar cell backboard, is characterized in that, described solar cell backboard comprises weathering layer, structural reinforcing layer and barrier layer successively;
The component of described weathering layer comprises PETG-1,4-CHDM ester (PETG), antioxidant and uvioresistant stabilizer; In described weathering layer: described antioxidant accounts for the 1%-5% of described weathering layer total weight, and described uvioresistant stabilizer accounts for the 0.5%-2% of described weathering layer total weight; Described PETG-1,4-CHDM ester (PETG) density is 1.29-1.40g/cm
3, relative molecular weight is 15000-18000, inherent viscosity is 0.52-0.62dl/g;
The component of described structural reinforcing layer comprises PETG (PET), white inorganic pigment, antioxidant and uvioresistant stabilizer; In described structural reinforcing layer: described antioxidant accounts for the 1%-5% of described structural reinforcing layer total weight, and described uvioresistant stabilizer accounts for the 0.5%-2% of described structural reinforcing layer total weight, and described white inorganic pigment accounts for the 10%-30% of described structural reinforcing layer total weight; The relative molecular weight of PET section used is 16000-18000, and density is 1.38-1.40g/cm
3, inherent viscosity is 0.52-0.65dl/g;
The component of described barrier layer comprises ethylene-vinyl alcohol copolymer (EVOH), and antioxidant and uvioresistant stabilizer, described ethylene-vinyl alcohol copolymer contain the ethene that weight percentage is 20%-40%; In described barrier layer: described antioxidant accounts for the 1%-5% of described barrier layer total weight, and described uvioresistant stabilizer accounts for the 0.5%-2% of described barrier layer total weight; The relative molecular weight of described ethylene-vinyl alcohol copolymer (EVOH) is between 12000-15000.
2. a solar cell backboard as claimed in claim 1, is characterized in that, the thickness of described weathering layer is the 10-100 micron, and the thickness of described structural reinforcing layer is the 150-350 micron, and the thickness of described barrier layer is the 10-100 micron.
3. the preparation method of a solar cell backboard as claimed in claim 1 or 2, is characterized in that, described preparation method comprises the steps:
(1), the each component of described weathering layer mixes, and makes mixed plastic A; The each component of described structural reinforcing layer mixes, and makes mixed plastic B; The each component of described barrier layer mixes, and makes mixed plastic C;
(2), the prepared three kinds of mixed plastics of step (1) are carried out respectively fusion plastification, the melt of gained enters the three-layer co-extruded die head that goes out machine, coex composite membranes by distributor;
(3), step (2) gained laminated film, by cooling, slab, stretch processes, make three-layer co-extruded film, cut described film, make described solar cell backboard.
4. a solar cell, comprise solar cell backboard, it is characterized in that, described solar cell backboard is the described solar cell backboard of claim 1 or 2.
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| CN103022192B (en) * | 2012-10-18 | 2015-11-18 | 宁波长阳科技有限公司 | A kind of high reflectance solar cell backboard film and a kind of solar cell |
| US9412921B2 (en) | 2012-11-20 | 2016-08-09 | Industrial Technology Research Institute | Module structure |
| CN104347743B (en) * | 2013-07-26 | 2016-12-28 | 比亚迪股份有限公司 | A kind of solar cell backboard and preparation method thereof and solar module |
| CN103456817B (en) * | 2013-08-20 | 2015-09-16 | 常州大学 | A kind of floride-free solar cell backboard and preparation method thereof |
| CN103681973B (en) * | 2013-12-27 | 2015-12-30 | 青岛日能拉伸膜科技股份有限公司 | A kind of processing technology being exclusively used in biaxial tension solar energy backboard polyester film |
| CN103722840A (en) * | 2014-01-08 | 2014-04-16 | 苏州尚善新材料科技有限公司 | Humidity-resisting solar cell backplate without adhesive and manufacturing method thereof |
| CN104774434B (en) * | 2015-04-01 | 2018-01-16 | 广州奥鹏能源科技有限公司 | A kind of high-weatherability solar cell backboard material and preparation method |
| CN105870237B (en) * | 2016-04-18 | 2017-05-03 | 苏州赛伍应用技术有限公司 | Co-extruded one-time formed backplate with three-layer structure for solar cell module |
| CN106601848A (en) * | 2016-12-01 | 2017-04-26 | 梁结平 | Crystalline silicon photovoltaic module |
| CN109994566B (en) * | 2017-12-28 | 2021-07-27 | 宁波长阳科技股份有限公司 | Solar back panel film and preparation method thereof |
| CN109994565A (en) * | 2017-12-28 | 2019-07-09 | 宁波长阳科技股份有限公司 | Solar energy backboard membrane and preparation method thereof |
| CN111775531A (en) * | 2020-08-01 | 2020-10-16 | 浙江中聚材料有限公司 | Multilayer extrusion type transparent solar photovoltaic back plate |
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| KR101690974B1 (en) * | 2007-06-15 | 2016-12-29 | 알케마 인코포레이티드 | Photovoltaic modules having a polyvinylidene fluoride backsheet |
| CN101764163B (en) * | 2009-12-25 | 2011-07-20 | 杭州福斯特光伏材料股份有限公司 | Back film for solar module |
| CN101805497A (en) * | 2010-03-02 | 2010-08-18 | 江苏裕兴薄膜科技股份有限公司 | Anti-blocking agent master batch for photodiffusion polyester based film and preparation method and application thereof |
| CN102157591B (en) * | 2011-01-11 | 2012-09-19 | 山东东岳高分子材料有限公司 | Back panel of solar cell and preparation method thereof |
| CN102166851B (en) * | 2011-01-19 | 2014-02-05 | 宁波激智科技股份有限公司 | Solar cell backing plate and solar cell module using same |
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