CN102765235A - Novel solar battery backboard - Google Patents
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Abstract
The invention relates to a novel solar battery backboard. The novel solar battery backboard comprises a weather resistant layer, a bonding layer and an insulation layer bonded in sequence, wherein the weather resistant layer consists of the following components by weight: 40-80 parts of fluorine-containing polymer, 5-30 parts of acrylic acid polymer, 5-20 parts of inorganic filler and 5-15 parts of maleic anhydride grafted ethylene-vinyl acetate copolymer; and the insulation layer consists of the following components by weight: 70-90 parts of polyethylene glycol terephthalate, 1-20 parts of polytetrafluoroethylene micro-powder and 5-20 parts of uvioresistant additive. The novel solar battery backboard is novel in structure, easily available in material and low in cost; and the interlayer bonding strength is enhanced, the weather resistance is improved and the service life of a solar assembly is prolonged.
Description
Technical field
The present invention relates to the solar-energy photo-voltaic cell technical field, particularly a kind of novel solar battery backboard.
Background technology
Solar cell backboard is also referred to as solar cell backboard film, photovoltaic back, photovoltaic back film, solar energy backboard.Solar cell backboard is the assembly that is widely used in solar cell (photovoltaic), is positioned at the back side of solar panel, and the battery sheet is played protection and supporting role, has reliable insulating properties, water preventing ability, resistance to ag(e)ing.The backboard film is divided into two kinds: a kind of for applying the backboard film, at PETG (PET) polyester film coated on both sides fluororesin, through the dry solidification film forming.A kind of is gluing combined type backboard film, compound fluorine film or EVA glued membrane on PET polyester film two sides, and with suitable binding agent bonding, common have structures such as TPT, TPE, KPK between the trilamellar membrane.In the TPT structure, T refers to the Tedlar film of E.I.Du Pont Company, and composition is polyvinyl fluoride (PVF), and P refers to PETG (PET) film, so TPT refers to the PVF/PET/PVF structure.The typical production merchant of the backboard of TPT structure is an Isovolta company.Wherein the main effect of PVF film is weather-proof, has only E.I.Du Pont Company to produce, and holds at high price.In order to save cost; Satisfy the needs of each solar product; Can be substituted by other weaker plastics of weatherability towards the PVF of battery sheet layer, Given this, the backboard of TPE structure has been invented by the Medico company of the U.S.; Wherein E refers to ethylene-vinyl acetate (EVA), so TPE refers to the PVF/PET/EVA structure.3M company adopts hexafluoropropylene (HFP)/tetrafluoroethylene (TFE)-vinylidene (THV) as weathering layer, and its back board structure is THV/PET/EVA.Also have company to adopt ethylene-chlorotrifluoro-ethylene copolymer (ECTFE), ethylene-tetrafluoroethylene copolymer (ETFE) in addition, all occur with the three-decker form as back veneer material.
Because the fluoroplastics surface can be low; Except that PVF and THV are the kind that is easier to relatively bond; Other fluoroplastics are very difficult to bonding; Use other fluorine film in use, be easy to take place layering, jaundice and cracking phenomena, have a strong impact on the service life of solar cell as the solar energy backboard of weathering layer.Therefore develop a kind of simple in structure, cheap and weather-proof, water, solar energy backboard that the vapour locking separating performance is good becomes industry one big demand.
Chinese patent notification number CN101582458B, January 26 2011 Granted publication day, denomination of invention: solar cell backboard.This invention relates to a kind of novel solar battery backboard; Comprise bonding successively weathering layer, first adhesive linkage, structure enhancement layer, second adhesive linkage and bonding reflecting layer, weathering layer is inorganic material-modified polyvinylidene fluoride alloy layer, and bonding reflecting layer is the white polyethylene layer; Preferably; Polyvinylidene fluoride alloy layer is the plastic alloy alloy-layer of Kynoar and inorganic material, and thickness 4～40 μ m, white polyethylene layer are the plastic alloy layers that is mixed with inorganic Chinese white, uvioresistant stabilizing agent and thermo oxidative aging stabilizing agent in the polyethylene; Thickness is 10～300 μ m; The structure enhancement layer is the PETG layer, and first adhesive linkage and said second adhesive linkage can be a kind of in polyurethane glue-line, acrylic acid ester glue-line or the epoxy adhesive layer, and thickness is 1 μ m～30 μ m.Material of the present invention is easy to get, and cost reduces greatly, and weak point is a complex structure, and properties of product are unstable, and the preparation process is loaded down with trivial details.
Chinese patent publication number CN102157591A, open day on August 17th, 2011, denomination of invention: a kind of solar cell backboard and preparation method thereof.This application case discloses a kind of solar cell backboard and preparation method thereof.The solar energy backboard of this invention has three polymer retes, comprises top-down bonding weathering layer, bonding enhancement layer and the wet layer of bonding resistance.The bonding weathering layer is the PVDF/EVA alloy-layer, and the bonding enhancement layer is the PET/PMMA alloy-layer, and the wet layer of bonding resistance is the PVDF/PVB alloy-layer.The preparation method adopts the method for multilayered molten coextrusion, realizes that the no interface between three retes fuses, and composite membrane need pass through online high-temperature shaping and reaches good dimensional stability.The solar cell backboard of this invention has only three-decker, need not to use adhesive linkage, and preparation technology is simple; Saved the step of gluing, hot pressing; Weak point is that the interlaminar bonding performance is unstable, and thickness is difficult to control, and the shrinkage factor difference can cause the composite membrane size unstable between each layer.
Summary of the invention
The present invention has overcome the defective of prior art, and a kind of solar energy backboard of simple in structure, cheap, function admirable is provided.
In order to solve the problems of the technologies described above; The present invention realizes through following technical scheme: a kind of novel solar battery backboard; Comprise weathering layer, tack coat and the insulating barrier of bonding successively, by weight, described weathering layer is composed of the following components: 40 ~ 80 parts of fluoropolymers, 5 ~ 30 parts of acrylic polymers; 5 ~ 20 parts of inorganic fillers, 5 ~ 15 parts of maleic anhydride grafted ethene-vinyl acetate co-polymers; Described insulating barrier is composed of the following components: 70 ~ 90 parts of PETGs, 1 ~ 20 part of ptfe micropowder, 5 ~ 20 parts of uvioresistant additives.
Further:
Described fluoropolymer is a kind of in fluoride homopolymer, vinylidene homopolymerization or copolymer, CTFE homopolymerization or copolymer, the TFE copolymer.
Described fluoropolymer is a kind of in polyvinyl fluoride, Kynoar, vinylidene-hexafluoropropylene copolymer, polytrifluorochloroethylene, ethene-chlorotrifluoroethylene, ethene-TFE copolymer, tetrafluoroethene-perfluoro propyl vinyl ether copolymer, the tetrafluoraoethylene-hexafluoropropylene copolymer.
Acrylic polymer is selected from a kind of in polymethyl methacrylate, polyethyl methacrylate, polybutyl methacrylate and the polycyclohexyl methacrylate in the described weathering layer.
Inorganic filler is selected from a kind of in kaolin, glass micro mist, barium sulfate, titanium dioxide and the zinc oxide in the described weathering layer.
In the described weathering layer in maleic anhydride grafted ethene-vinyl acetate co-polymer ethene account for 40% of weight, vinylacetate accounts for 60 % of weight.
The ptfe micropowder particle diameter is 1～20um in the described insulating barrier, and number-average molecular weight is 1～30,000.
The uvioresistant additive is selected from a kind of in silica, titanium dioxide and the glass microballoon in the described insulating barrier.
Described tack coat is ethylene-vinyl acetate copolymer adhesive layer or epoxy resin adhesive layer.
Described weathering layer thickness is 10 ~ 40um, and adhesive layer thickness is 10～50um, and thickness of insulating layer is 200 ~ 300um.
New type solar energy backboard of the present invention is by weathering layer, tack coat and the insulating barrier of bonding are formed successively.Through maleic anhydride grafted ethene-vinyl acetate co-polymer weathering layer is carried out modification, promote the compatibility with tack coat, improved the adhesion strength of weathering layer and tack coat.Insulating barrier has improved weatherability and anti-uv-ray through the ptfe micropowder modification on the basis that possesses good insulation properties and mechanical performance simultaneously.
Fluoropolymer among the present invention can be selected from a kind of in fluoride homopolymer, vinylidene homopolymerization or copolymer, CTFE homopolymerization or copolymer, the TFE copolymer, a kind of in preferred polyvinyl fluoride, Kynoar, vinylidene-hexafluoropropylene copolymer, polytrifluorochloroethylene, ethene-chlorotrifluoroethylene, ethene-TFE copolymer, tetrafluoroethene-perfluoro propyl vinyl ether copolymer, the tetrafluoraoethylene-hexafluoropropylene copolymer.
Acrylic polymer is because of containing the carbonyl side group; And form chemical action power between the hydrocarbon key group of fluoropolymer; Have good compatibility, can reduce the crystallization and the melt temperature of fluoropolymer simultaneously, improve crystalline texture; Help the reduction of melt strength and the flow casting molding of fluoro-containing copolymer film, play the effect of plasticizer.Acrylic polymer can use methacrylic polymer, a kind of in preferred polymethyl methacrylate, polyethyl methacrylate, polybutyl methacrylate and the polycyclohexyl methacrylate.Acrylic polymer is if add very little in fluoropolymer; Do not have plasticization, be unfavorable for film forming, addition is too big; Will influence the chemical-resistant stability and the heat resistance of fluoro-containing copolymer film, so the parts by weight of acrylic polymer are 5～30 parts among the present invention.
The ethylene-vinyl acetate copolymer of maleic anhydride graft has hydrocarbon key and carbon-oxygen bond; The Chang Zuowei bulking agent uses; It is added in weathering layer, easily with weathering layer in chemical action between fluoropolymer, acrylic polymer generation chemical bond, and with tack coat in ethene=vinyl acetate co-polymer or epoxy resin intermolecular formation chemical bond with joint efforts; Can promote the compatibility between weathering layer and the tack coat, improve adhesion strength.Maleic anhydride grafted ethene-vinyl acetate co-polymer is if add too many; Can influence the mechanical property and the weatherability of weathering layer; Just do not have compatibilization effect very little if add, so the parts by weight of maleic anhydride grafted ethene-vinyl acetate co-polymer are 5～15 parts among the present invention.
The ptfe micropowder low-molecular-weight white micro mist that to be polytetrafluoroethylene (PTFE) process through special process because of the molecular structure of stabilizer pole is arranged, has chemical resistance, heat endurance, weatherability and the temperature tolerance of excellence.It not only keeps the good characteristic of polytetrafluoroethylene (PTFE), but also has good dispersion, can with the even blend of other materials, the base material serviceability is obviously improved.If the ptfe micropowder addition is too big, can cause ptfe micropowder in PETG, to produce agglomeration, influential to the apparent and physical property of pet film; If add very little; Weatherability and anti-uv-ray influence to insulating barrier are little, and therefore, the parts by weight of ptfe micropowder are 1 ~ 20 part in the insulating barrier of the present invention; Particle diameter is 1 ~ 20 μ m, and number-average molecular weight is 1～30,000.
Inorganic filler produces shielding and buffer action to the strand in the polymeric matrix, thereby slackens intermolecular force, and then improve polymer flow property and processing characteristics owing to the volume steric effect.Inorganic filler can be selected basalt fibre powder, kaolin, glass micro mist, barium sulfate, titanium dioxide and zinc oxide for use, a kind of in preferred kaolin, glass micro mist, barium sulfate, titanium dioxide and the zinc oxide.The parts by weight of the inorganic filler among the present invention in the weathering layer are 5 ~ 20 parts.
The uvioresistant additive is because the particular chemical structure; Self good optical property and physics, chemical stability have been given; Effect with higher refraction coefficient and stronger reflected sunlight; In polymer, form fine and close reflecting layer, reduce the destruction of sunshine the polymer internal structure.The uvioresistant additive can be selected calcium carbonate, silica, titanium dioxide, kaolin, talcum powder and glass microballoon for use, a kind of in preferred silica, titanium dioxide and the glass microballoon.The parts by weight of the uvioresistant additive among the present invention in the insulating barrier are 5 ~ 20 parts.
Solar cell backboard preparation method of the present invention: at first the weathering layer raw material is made fluoro-containing copolymer film through the extruder fusion extrusion casting by prescription; By prescription the insulating barrier raw material is melt extruded through extruder then; Biaxial tension makes pet film, again weathering layer fluoro-containing copolymer film and insulating barrier pet film is carried out corona treatment; On pet film, be coated with tack coat afterwards again, to carry out hot pressing compound with the weathering layer fluoro-containing copolymer film again, and be cured, and obtains the solar energy rear panel compound film.
Advantage of the present invention is:
1, through maleic anhydride grafted ethene-vinyl acetate co-polymer weathering layer is carried out modification, adhesion strength between enhancement layer;
2, insulating barrier is through the ptfe micropowder modification, improved weatherability and anti-uv-ray possessing on good insulation properties and the mechanical performance basis, ensured the service life of solar components;
3, backboard of the present invention is made up of weathering layer, tack coat and insulating barrier, novel structure, and material is easy to get, and cost is low.
The specific embodiment
Below the present invention is explained more specifically that but the present invention is not limited to described embodiment through embodiment.
The used product of the present invention all can commercially availablely be obtained, wherein:
Kynoar (PVDF): Kynar 720, French Arkema.
Vinylidene fluoride-hexafluoropropylene copolymer: 11010, French Su Wei company.
Polyvinyl fluoride (PVF): F40, du pont company.
Polytrifluorochloroethylene (PCTFE): M-400H, Daikin company.
Ethylene-chlorotrifluoro-ethylene copolymer (ECTFE): 300LC, U.S. Su Wei.
Ethylene-tetrafluoroethylene copolymer (ETFE): C-88AXP, Japan AGC company.
Tetrafluoraoethylene-hexafluoropropylene copolymer (FEP): FJP-810, Juhua Group Co..
Tetrafluoroethene-perfluoro propyl vinyl ether copolymer: 340, Dupont.
Polymethyl methacrylate (PMMA): V150, Atofina.
Polyethyl methacrylate (PEMA): normal viscosity (being dissolved in 25 ℃ of toluene, solid powder 30%) 7500cps.
Titanium dioxide (TiO
2): R706, du pont company.
Barium sulfate (BaSO
4): granularity: 1250 orders, the high full chemical industry Co., Ltd in Shanghai.
Zinc oxide (ZnO): model, 99.7, the high full chemical industry Co., Ltd in Shanghai.
Maleic anhydride grafted ethene-vinyl acetate co-polymer: self-control, by weight, ethene accounts for 40%, and vinylacetate accounts for 60%, and the percent grafting of maleic anhydride is 1.5%.The preparation process of maleic anhydride grafted ethene-vinyl acetate co-polymer is following: commercially available maleic anhydride 3～4kg is dissolved in the acetone; Again with the 100kg ethylene-vinyl acetate copolymer (by weight; Ethene accounts for 40%, and vinylacetate accounts for 60%) mix at high-speed mixer, wait the acetone volatilization after; Again through double screw extruder 100～150 ℃ of granulations, after the electron accelerator electron ray or
60Radiation 10～25KGy dosage in the gamma-rays of Co source, the ethylene-vinyl acetate copolymer of maleic anhydride graft of percent grafting 1.5%.
PETG (PET): chemical industry Co., Ltd far away in the permanent industry in Beijing.
Ptfe micropowder (PTFE): TF-9207, particle diameter 1～20um, number-average molecular weight 1～30,000, Minnesota Mining and Manufacturing Company.
Glass microballoon: VS5500,3M company.
Silica (SiO
2): 3000 orders, the high full chemical industry Co., Ltd in Shanghai.
Embodiment 1:
Solar cell backboard comprises the layer of anti-marquis, tack coat, insulating barrier, wherein combines through tack coat between insulating barrier and the weathering layer.
Weathering layer: thickness is 10um, and by weight, it consists of: 80 parts of Kynoar; 5 parts of polymethyl methacrylates; 5 parts of titanium dioxide, 10 parts (by weight, ethene accounts for 40% to maleic anhydride grafted ethene-vinyl acetate co-polymer; Vinylacetate accounts for 60%, and the percent grafting of maleic anhydride is 1.5%).
Insulating barrier: thickness is 200um, and by weight, it is formed as follows: 85 parts of PETGs, 10 parts of ptfe micropowders, 5 parts of glass microballoons;
Tack coat: thickness is the ethylene-vinyl acetate copolymer adhesive of 10um, and by weight, it is formed as follows: ethene accounts for 40%, and vinylacetate accounts for 60%.
Embodiment 2
Solar cell backboard comprises the layer of anti-marquis, tack coat, insulating barrier, wherein combines through tack coat between insulating barrier and the weathering layer.
Weathering layer: thickness is 40um, and by weight, it is formed as follows: 70 parts of ethylene-tetrafluoroethylene copolymers (ETFE); 10 parts of polymethyl methacrylates; 5 parts in barium sulfate, 15 parts (by weight, ethene accounts for 40% to maleic anhydride grafted ethene-vinyl acetate co-polymer; Vinylacetate accounts for 60%, and the percent grafting of maleic anhydride is 1.5%).
Insulating barrier: thickness is 250um, and by weight, it is formed as follows: 90 parts of PETGs, 5 parts of ptfe micropowders, 5 parts of titanium dioxide.
Tack coat: thickness is the epoxy resin gluing agent of 30um.
Embodiment 3
Solar cell backboard comprises the layer of anti-marquis, tack coat, insulating barrier, wherein combines through tack coat between insulating barrier and the weathering layer.
Weathering layer: thickness is 20um, and by weight, it is formed as follows: 65 parts of vinylidene fluoride-hexafluoropropylene copolymers; 20 parts of polyethyl methacrylates; 8 parts of titanium dioxide, 7 parts (by weight, ethene accounts for 40% to maleic anhydride grafted ethene-vinyl acetate co-polymer; Vinylacetate accounts for 60%, and the percent grafting of maleic anhydride is 1.5%).
Insulating barrier: thickness is 270um, and by weight, it is formed as follows: 75 parts of PETGs, 15 parts of ptfe micropowders, 10 parts of glass microballoons.
Tack coat: thickness is the ethylene-vinyl acetate copolymer adhesive of 20um, and by weight, it is formed as follows: ethene accounts for 40%, and vinylacetate accounts for 60%.
Embodiment 4
Solar cell backboard comprises the layer of anti-marquis, tack coat, insulating barrier, wherein combines through tack coat between insulating barrier and the weathering layer.
Weathering layer: thickness is 30um, and by weight, it is formed as follows: 55 parts of polyvinyl fluorides (PVF); 30 parts of polymethyl methacrylates; 10 parts in zinc oxide, 5 parts (by weight, ethene accounts for 40% to maleic anhydride grafted ethene-vinyl acetate co-polymer; Vinylacetate accounts for 60%, and the percent grafting of maleic anhydride is 1.5%).
Insulating barrier: thickness is 300um, and by weight, it is formed as follows: 70 parts of PETGs, 20 parts of ptfe micropowders, 0 part of silica 1.
Tack coat: thickness is the epoxy resin gluing agent of 40um.
Embodiment 5
Solar cell backboard comprises the layer of anti-marquis, tack coat, insulating barrier, wherein combines through tack coat between insulating barrier and the weathering layer.
Weathering layer: thickness is 30um, and by weight, it is formed as follows: 55 parts of polytrifluorochloroethylene (PCTFE); 25 parts of polyethyl methacrylates; 15 parts of titanium dioxide, 5 parts (by weight, ethene accounts for 40% to maleic anhydride grafted ethene-vinyl acetate co-polymer; Vinylacetate accounts for 60%, and the percent grafting of maleic anhydride is 1.5%).
Insulating barrier: thickness is 270um, and by weight, it is formed as follows: 83 parts of PETGs, 7 parts of ptfe micropowders, 10 parts of titanium dioxide.
Tack coat: thickness is the epoxy resin gluing agent of 30um.
Embodiment 6
Solar cell backboard comprises the layer of anti-marquis, tack coat, insulating barrier, wherein combines through tack coat between insulating barrier and the weathering layer.
Weathering layer: thickness is 25um, and by weight, it is formed as follows: 40 parts of ethylene-chlorotrifluoro-ethylene copolymers (ECTFE); 30 parts of polymethyl methacrylates; 20 parts of titanium dioxide, 10 parts (by weight, ethene accounts for 40% to maleic anhydride grafted ethene-vinyl acetate co-polymer; Vinylacetate accounts for 60%, and the percent grafting of maleic anhydride is 1.5%).
Insulating barrier: thickness is 300um, and by weight, it is formed as follows: 89 parts of PETGs, 1 part of ptfe micropowder, 0 part of silica 1.
Tack coat: thickness is the glutinous agent of the ethylene-vinyl acetate copolymer of 50um, and by weight, it is formed as follows: ethene accounts for 40%, and vinylacetate accounts for 60%.
Embodiment 7
Solar cell backboard comprises the layer of anti-marquis, tack coat, insulating barrier, wherein combines through tack coat between insulating barrier and the weathering layer.
Weathering layer: thickness is 40um, and by weight, it is formed as follows: 50 parts of tetrafluoraoethylene-hexafluoropropylene copolymers (FEP); 20 parts of polyethyl methacrylates; 15 parts of titanium dioxide, 15 parts (by weight, ethene accounts for 40% to maleic anhydride grafted ethene-vinyl acetate co-polymer; Vinylacetate accounts for 60%, and the percent grafting of maleic anhydride is 1.5%).
Insulating barrier: thickness is 240um, and by weight, it is formed as follows: 70 parts of PETGs, 10 parts of ptfe micropowders, 20 parts of titanium dioxide.
Tack coat: thickness is the glutinous agent of the ethylene-vinyl acetate copolymer of 25um, and by weight, it is formed as follows: ethene accounts for 40%, and vinylacetate accounts for 60%.
Embodiment 8
Solar cell backboard comprises the layer of anti-marquis, tack coat, insulating barrier, wherein combines through tack coat between insulating barrier and the weathering layer.
Weathering layer: thickness is 20um, and by weight, it is formed as follows: 50 parts in tetrafluoroethene-perfluoro propyl vinyl ether copolymer; 30 parts of polymethyl methacrylates; 10 parts of titanium dioxide, 10 parts (by weight, ethene accounts for 40% to maleic anhydride grafted ethene-vinyl acetate co-polymer; Vinylacetate accounts for 60%, and the percent grafting of maleic anhydride is 1.5%).
Insulating barrier: thickness is 250um, and by weight, it is formed as follows: 80 parts of PETGs, 5 parts of ptfe micropowders, 5 parts of silica 1s.
Tack coat: thickness be 40um the agent of epoxy resin gluing.
Comparative Examples 1
Solar cell backboard comprises the layer of anti-marquis, tack coat, insulating barrier, wherein combines through tack coat between insulating barrier and the weathering layer.
Weathering layer: thickness is 10um, and by weight, it is formed as follows: 90 parts of Kynoar (PVDF), 5 parts of polymethyl methacrylates, 5 parts of titanium dioxide.
Insulating barrier: thickness is 200um, and by weight, it is formed as follows: 85 parts of PETGs, 10 parts of ptfe micropowders, 5 parts of glass microballoons;
Tack coat: thickness is the ethylene-vinyl acetate copolymer adhesive of 10um, and by weight, it is formed as follows: ethene accounts for 40%, and vinylacetate accounts for 60%.
Comparative Examples 2
Solar cell backboard comprises the layer of anti-marquis, tack coat, insulating barrier, wherein combines through tack coat between insulating barrier and the weathering layer.
Weathering layer: thickness is 40um, and by weight, it is formed as follows: 70 parts of ethylene-tetrafluoroethylene copolymers (ETFE), 10 parts of polymethyl methacrylates, 5 parts in barium sulfate, 15 parts of maleic anhydride grafted ethene-vinyl acetate co-polymers.
Insulating barrier: thickness is 250um, and by weight, it is formed as follows: 95 parts of PETGs, 5 parts of titanium dioxide.
Tack coat: thickness is the epoxy resin gluing agent of 30um.
The solar energy backboard that embodiment 1 ~ 8 and Comparative Examples 1 ~ 2 are made carries out peel strength test and weatherability test between weathering layer and the insulating barrier.Wherein, the method for testing of interlaminar strength is tested according to ASTM D1876 standard; The weatherability test condition is: 85 ℃ of temperature and humidity are to be incubated 1000h under 85% the condition, observe having or not jaundice to change.The result is following:
| Test event | Peel strength between weathering layer and the insulating barrier (N/cm) | Weatherability (phenomenon) |
| Embodiment 1 | ≥5 | Not jaundice, not cracking |
| Embodiment 2 | ≥5 | Not jaundice, not cracking |
| Embodiment 3 | ≥5 | Not jaundice, not cracking |
| Embodiment 4 | ≥5 | Not jaundice, not cracking |
| Embodiment 5 | ≥5 | Not jaundice, not cracking |
| Embodiment 6 | ≥5 | Not jaundice, not cracking |
| Embodiment 7 | ≥5 | Not jaundice, not cracking |
| Embodiment 8 | ≥5 | Not jaundice, not cracking |
| Comparative Examples 1 | 4.03 | Not jaundice has the part cracking |
| Comparative Examples 2 | ≥5 | Serious jaundice |
Claims (10)
1. novel solar battery backboard; Comprise weathering layer, tack coat and the insulating barrier of bonding successively; It is characterized in that by weight; Described weathering layer is composed of the following components: 40 ~ 80 parts of fluoropolymers, 5 ~ 30 parts of acrylic polymers, 5 ~ 20 parts of inorganic fillers, 5 ~ 15 parts of maleic anhydride grafted ethene-vinyl acetate co-polymers; Described insulating barrier is composed of the following components: 70 ~ 90 parts of PETGs, 1 ~ 20 part of ptfe micropowder, 5 ~ 20 parts of uvioresistant additives.
2. novel solar battery backboard according to claim 1 is characterized in that, described fluoropolymer is a kind of in fluoride homopolymer, vinylidene homopolymerization or copolymer, CTFE homopolymerization or copolymer, the TFE copolymer.
3. novel solar battery backboard according to claim 2; It is characterized in that described fluoropolymer is a kind of in polyvinyl fluoride, Kynoar, vinylidene-hexafluoropropylene copolymer, polytrifluorochloroethylene, ethene-chlorotrifluoroethylene, ethene-TFE copolymer, tetrafluoroethene-perfluoro propyl vinyl ether copolymer, the tetrafluoraoethylene-hexafluoropropylene copolymer.
4. novel solar battery backboard according to claim 1; It is characterized in that acrylic polymer is selected from a kind of in polymethyl methacrylate, polyethyl methacrylate, polybutyl methacrylate and the polycyclohexyl methacrylate in the described weathering layer.
5. novel solar battery backboard according to claim 1 is characterized in that, inorganic filler is selected from a kind of in kaolin, glass micro mist, barium sulfate, titanium dioxide and the zinc oxide in the described weathering layer.
6. novel solar battery backboard according to claim 1 is characterized in that, in the described weathering layer in maleic anhydride grafted ethene-vinyl acetate co-polymer ethene account for 40% of weight, vinylacetate accounts for 60 % of weight.
7. novel solar battery backboard according to claim 1 is characterized in that, the ptfe micropowder particle diameter is 1～20um in the described insulating barrier, and number-average molecular weight is 1～30,000.
8. novel solar battery backboard according to claim 1 is characterized in that, the uvioresistant additive is selected from a kind of in silica, titanium dioxide and the glass microballoon in the described insulating barrier.
9. novel solar battery backboard according to claim 1 is characterized in that described tack coat is ethylene-vinyl acetate copolymer adhesive layer or epoxy resin adhesive layer.
10. novel solar battery backboard according to claim 1 is characterized in that described weathering layer thickness is 10 ~ 40um, and adhesive layer thickness is 10～50um, and thickness of insulating layer is 200 ~ 300um.
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| CN103681920A (en) * | 2013-12-14 | 2014-03-26 | 宁波华丰包装有限公司 | Solar cell backboard and manufacturing method thereof |
| CN104356615A (en) * | 2014-11-14 | 2015-02-18 | 无锡中洁能源技术有限公司 | Preparation method of modified PET (polyethylene terephthalate) substrate for solar backboard |
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| US20150228829A1 (en) * | 2012-12-27 | 2015-08-13 | Asahi Glass Company, Limited | Blended polymer containing ethylene/tetrafluoroethylene copolymer, molded product of such blended polymer, back sheet for solar cell, and method for producing the molded product |
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| CN105237924A (en) * | 2015-09-01 | 2016-01-13 | 北京汉能光伏投资有限公司 | Preparation method and application of polytetrafluoroethylene modified film being suitable for solar cell protective film |
| CN105949973A (en) * | 2016-05-19 | 2016-09-21 | 安徽德润工艺品有限公司 | Anti-aging paint special for bamboo-woven lacquer boxes |
| WO2017222812A1 (en) * | 2016-06-20 | 2017-12-28 | 3M Innovative Properties Company | Self-priming adhesive |
| CN106057942A (en) * | 2016-07-25 | 2016-10-26 | 无锡中洁能源技术有限公司 | Novel solar energy backboard structure |
| CN109817739A (en) * | 2017-11-16 | 2019-05-28 | 宁波长阳科技股份有限公司 | A kind of solar cell backboard polyester film |
| CN108346709A (en) * | 2018-01-11 | 2018-07-31 | 中天科技精密材料有限公司 | A kind of functionalization polyvinylidene difluoride film of double-layer coextrusion and its preparation method of photovoltaic cell backplane |
| CN109192800A (en) * | 2018-07-15 | 2019-01-11 | 浙江歌瑞新材料有限公司 | A kind of fluorine-containing thin-film solar cells cephacoria and its manufacturing process |
| CN109192800B (en) * | 2018-07-15 | 2020-04-14 | 浙江歌瑞新材料有限公司 | Fluorine-containing thin-film solar cell front film and manufacturing process thereof |
| CN109206822A (en) * | 2018-09-06 | 2019-01-15 | 常州斯威克光伏新材料有限公司 | Black EVA material for solar cell module encapsulation |
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