CN104868003A - Solar photovoltaic backboard with high steam blocking performance - Google Patents
Solar photovoltaic backboard with high steam blocking performance Download PDFInfo
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- CN104868003A CN104868003A CN201510261374.3A CN201510261374A CN104868003A CN 104868003 A CN104868003 A CN 104868003A CN 201510261374 A CN201510261374 A CN 201510261374A CN 104868003 A CN104868003 A CN 104868003A
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- mass parts
- water vapor
- high water
- photovoltaic backboard
- vapor rejection
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
- B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The invention discloses a photovoltaic backboard with high steam blocking performance. The photovoltaic backboard comprises a first weather-resisting layer, a base layer, a bonding layer, a blocking layer and a second weather-resisting layer. A metallic blocking layer is added, in addition to an original photovoltaic backboard. The backboard obtained is high in steam blocking performance, has excellent flame resistance, thermal conductivity, weatherability, insulating properties and EVA bonding property, and can be widely used in solar cell modules.
Description
Technical field
The present invention relates to a kind of photovoltaic backboard of high water vapor rejection.
Background technology
Along with the fast development of solar energy power generating industry, more and more higher requirement is proposed to photovoltaic backboard performance.Solar energy backboard is positioned at the outermost layer of module backside, plays protection and supporting role to cell piece.Backboard should have reliable electric insulating quality in general, water vapor barrier property and good resistance to ag(e)ing.Keep best operating state to make solar cell and maintain the useful life of 25 years, excellent water vapor barrier property becomes one of important indicator weighing backboard performance quality.If solar energy backboard water vapor rejection performance is bad, steam penetrates into by backboard the caking property that encapsulation system inside can affect EVA, causes backboard and EVA delamination, makes cell piece oxidized thus serious useful life of reducing cell piece generating efficiency and assembly.
On market today, the water vapor rejection performance of back veneer material is still in lower level.The water vapor permeable rate of conventional crystal silicon backboard only can control at 2.5g/m
2within 24h.In recent years, expert is being devoted to the water vapor barrier property improving photovoltaic back always, ites is desirable to the water blocking rate of photovoltaic back to be increased to 1.0g/m
2level within 24h.Prior art publication number is that the Japan Patent of JP2013047310A utilizes composite flame-proof layer and swellable clays fossil water vapor barrier coatings to prepare anti-flammability and the good backboard of water vapor barrier property, but complex process, cost is higher.The photovoltaic back of high barrier seldom has report, does not also obtain industrialization large-scale promotion so far.
Therefore, develop and a kind of both there is higher water vapor barrier property, have again the necessary weatherability of back veneer material, insulating properties and with the premium properties such as EVA caking property, the photovoltaic back also with additional functions such as fire-retardant and heat conductivilitys is simultaneously problems that solar cell package industry the most urgently solves.
Summary of the invention
The object of the invention is for the deficiencies in the prior art part, provide a kind of high water vapor rejection solar energy backboard, to meet the requirement of assembly for low water vapor transmittance photovoltaic back.
The object of the invention is to be achieved through the following technical solutions: a kind of high water vapor rejection photovoltaic backboard, is bondd successively by the first weathering layer, basalis, tack coat, barrier layer and the second weathering layer and form; Described barrier layer is the one in aluminium foil, iron foil, tinfoil paper, zinc paper tinsel, nickel foil, Copper Foil, silver foil, platinum foil, goldleaf, and thickness is 5 ~ 100 μm, and no more than 50 of the pin hole number of every square metre, aperture is not more than 0.3mm.
Further, described basalis is made up of according to any proportioning one or more in PETG (PET), polybutylene terephthalate (PBT) (PBT), PEN (PEN), PBN (PBN).
Further, described tack coat is configured by following material and forms: matrix resin 100 mass parts, curing agent 3 ~ 25 mass parts, solvent 5 ~ 30 mass parts;
Further, described matrix resin is polyurethane resin, alkyd resins or acrylic resin.
Further, described first weathering layer is formulated by following material: fluorine resin 100 mass parts, curing agent 5 ~ 30 mass parts, filler 10 ~ 60 mass parts, auxiliary agent 1 ~ 10 mass parts, catalyst 0.1 ~ 2 mass parts, solvent 10 ~ 250 mass parts; Thickness is 5 μm ~ 100 μm; Described second weathering layer is formulated by following material: fluorine resin 100 mass parts, curing agent 5 ~ 25 mass parts, filler 10 ~ 60 mass parts, auxiliary agent 1 ~ 10 mass parts, catalyst 0.1 ~ 2 mass parts, solvent 10 ~ 250 mass parts; Thickness is: 5 μm ~ 100 μm.
Further, described curing agent is that one or more in isocyanates, amino resins, blocked isocyanate, blocked isocyanate, melamine form according to any proportioning.
Further, described solvent is toluene, dimethylbenzene, ethyl acetate, propyl acetate, butyl acetate or 1-Methoxy-2-propyl acetate (PMA).
Further, described filler is made up of according to any proportioning one or more in titanium dioxide, calcium carbonate, talcum powder, silica flour, carbon black, flatting silica, mica powder, imvite; Described catalyst is organic tin catalyst.
Further, described auxiliary agent is by dispersant, and levelling agent, defoamer, ultraviolet absorber, light stabilizer, one or more of antioxidant form according to any proportioning.
Further, described fluorine resin is vinylidene (PVDF), three fluorine-type resins (FEVE) or four fluorine-type resins (FEP), three fluorine-type resins are PVF-vinyl ethers (ester) copolymer, and four fluorine-type resins are tetrafluoroethene and alkyl vinyl ether co-polymer or tetrafluoroethene and alkyl vinyl ester copolymer.
Beneficial effect of the present invention:
1. the present invention is by adding barrier layer, significantly can reduce the water vapor transmittance of backboard, backboard water vapor permeable rate is controlled at 0.5g/m
2within 24h, significantly improve the water vapor rejection performance of backboard;
2. high water vapor rejection photovoltaic back of the present invention also has good fire resistance, and the flame retardant rating of backboard is up to VTM-0 level;
3. high water vapor rejection photovoltaic back product of the present invention also has excellent electric insulating quality, weatherability and the caking property with EVA excellence;
4. first backboard of the present invention by boning basalis and barrier layer, and then the manufacture craft of dual coating is simple and easy to do, is very applicable to industrialized production.
5. barrier layer designs between basalis and weathering layer by the present invention, the steam in air effectively can be intercepted the outer most edge at backboard, effectively enhances the weather resistance of other parts in other parts in backboard and assembly.
6. barrier layer is designed to metal forming by the present invention, effectively improve the heat conductivility of backboard, the heat-flash defined between backboard and air exchanges, and reaches the effect of good distribute heat, is conducive to the raising of the photoelectric conversion efficiency in photovoltaic module running greatly.
Accompanying drawing explanation
Fig. 1 is the cross sectional representation of backboard of the present invention; Wherein, 1 is the first weathering layer, and 2 is basalis, and 3 is tack coat, and 4 is barrier layer, and 5 is the second weathering layer.
Embodiment
A kind of high water vapor rejection photovoltaic of the present invention backboard, is bondd successively by the first weathering layer, basalis, tack coat, barrier layer and the second weathering layer and forms; When cell module encapsulation, battery sheet packaging is in that side of the first weathering layer.The present invention is on the basis of existing photovoltaic back, adds a barrier layer, effectively can reduce the water vapor transmittance of backboard, and backboard water vapor permeable rate is controlled at 0.5g/m
2within 24h, significantly improve the water vapor rejection performance of backboard.For ensureing barriering effect, no more than 50 of the pin hole number of barrier layer every square metre, aperture is not more than 0.3mm.
Be further described in detail the present invention below in conjunction with example, but it is pointed out that the scope of protection of the invention is obviously not limited thereto, any change on basis of the present invention and distortion, all within protection scope of the present invention.
In the embodiment of the present invention, basalis selects the PET base layer of 250 μm of thickness, but is not limited thereto.
Embodiment 1:
The present embodiment adopts the PET of 250 μm as basalis, and the thickness of aluminium foil layer is 5 μm.
Tack coat formula is as follows: (mass fraction)
Acrylic resin LR7765 (Mitsubishi) 100;
Curing agent TPA90 SB (Japanese Asahi Chemical Industry) 3;
Solvent ethyl acetate 20;
First weathering layer formula is as follows: (mass fraction)
Second weathering layer formula is as follows: (mass fraction)
Backboard manufacturing process: choose 250 μm of thick PET base material and be cut to suitable size, adopt surface treatment to 50 ~ 60dyne/cm.5 μm of aluminium foils (no more than 50 of the pin hole number of every square metre, aperture is not more than 0.3mm) are selected to be cut to suitable size.At PET base material surface-coated tack coat, then with laminating machine, aluminium foil and PET are carried out overlay film, obtain the three-layer composite structure of PET-tack coat-aluminium foil.Apply the first weathering layer in PET face, heated-air drying 2 ~ 5min film forming of 120 DEG C, make about 15 μm of weather-proof undercoating of thick caking property, adopt same technique, outer in aluminium foil surface coating weatherability, heated-air drying 2 ~ 5min film forming of 120 DEG C, make about 50 μm of thick weatherabilities outer.
Embodiment 2
The present embodiment adopts the PBT of 250 μm as basalis, and the thickness of tinfoil paper layer is 22 μm.
In the present embodiment, tack coat formula is as follows: (mass fraction)
Acrylic resin ACR6730 (brilliant same Dehua work) 100;
Curing agent N3390 (German Baeyer) 15;
Solvent acetic acid propyl ester 5;
First weathering layer formula is as follows: (mass fraction)
Second weathering layer formula is as follows: (mass fraction)
Backboard manufacturing process: except employing thickness is tinfoil paper (no more than 50 of the pin hole number of every square metre of 22 μm, aperture is not more than 0.3mm), tack coat is filled a prescription, first weathering layer formula, second weathering layer formula adopts beyond the present embodiment formula, and other manufacturing process are identical with embodiment 1.It is 50 μm that the present embodiment controls obtained first weathering layer of coating processes, and the second weathering layer is 15 μm.
Embodiment 3
The present embodiment adopts the PET of 250 μm as basalis, and the thickness of aluminium foil layer is 47 μm.
In the present embodiment, tack coat formula is as follows: (mass fraction)
Acrylic resin 7105# (DSM company) 100;
Curing agent Desmodur Z4470 (Bayer Bitterfeld GmbH) 25;
Solvent acetic acid propyl ester 10;
First weathering layer formula is as follows: (mass fraction)
Second weathering layer formula is as follows: (mass fraction)
Backboard manufacturing process: except employing thickness is aluminium foil (no more than 50 of the pin hole number of every square metre of 47 μm, aperture is not more than 0.3mm), tack coat is filled a prescription, first weathering layer formula, second weathering layer formula adopts beyond the present embodiment formula, and other manufacturing process are identical with embodiment 1.It is 30 μm that the present embodiment controls obtained first weathering layer of coating processes, and the second weathering layer is 40 μm.
Embodiment 4
The present embodiment adopts the PEN of 250 μm as basalis, and the thickness of copper foil layer is 86 μm.
In the present embodiment, tack coat formula is as follows: (mass fraction)
Polyurethane resin 100;
Curing agent HXR-100 (Japanese polyurethane) 8;
Solvent acetic acid propyl ester 30;
First weathering layer formula is as follows: (mass fraction)
Second weathering layer formula is as follows: (mass fraction)
Backboard manufacturing process: except employing thickness is Copper Foil (no more than 50 of the pin hole number of every square metre of 86 μm, aperture is not more than 0.3mm), tack coat is filled a prescription, first weathering layer formula, second weathering layer formula adopts beyond the present embodiment formula, and other manufacturing process are identical with embodiment 1.It is 100 μm that the present embodiment controls obtained first weathering layer of coating processes, and the second weathering layer is 5 μm.
Embodiment 5
The present embodiment adopts the PEN of 250 μm as basalis, and the thickness of aluminium foil layer is 100 μm.
In the present embodiment, tack coat formula is as follows: (mass fraction)
Alkyd resins 100;
Curing agent TPA90SB (Japanese Asahi Chemical Industry) 12;
Solvent propylene glycol methyl ether acetate (PMA) 15;
First weathering layer formula is as follows: (mass fraction)
Second weathering layer formula is as follows: (mass fraction)
Backboard manufacturing process: except employing thickness is aluminium foil (no more than 50 of the pin hole number of every square metre of 100 μm, aperture is not more than 0.3mm), tack coat is filled a prescription, first weathering layer formula, second weathering layer formula adopts beyond the present embodiment formula, and other manufacturing process are identical with embodiment 1.It is 5 μm that the present embodiment controls obtained first weathering layer of coating processes, and the second weathering layer is 100 μm.
Comparative example 1
Adopt the PET of 250 μm as basalis, the first weathering layer is identical with embodiment 1 with the second weathering layer formula.Backboard manufacturing process: choose 250 μm of thick PET base material and be cut to suitable size, adopt surface treatment to 50 ~ 60dyne/cm.At PET one side coating the first weathering layer, heated-air drying 2 ~ 5min film forming of 120 DEG C, make about 15 μm of thick caking property first weathering layers, adopt same technique, the second weathering layer is applied at PET another side, heated-air drying 2 ~ 5min film forming of 120 DEG C, make about 50 μm of thick weatherabilities outer.Backboard obtained in comparative example 1 is not except having aluminium foil layer and tack coat, and other material is all identical with embodiment 1 with manufacture craft.
Comparative example 2:
Photovoltaic back BEC-301 is buied in market, and structure is FEVE/PET/FEVE, thickness 290 ± 10 microns.
Comparative example 3:
Photovoltaic back VTPE is buied in market, and structure is PVF/PET/PE, thickness 350 ± 10 microns.
Comparative example 4:
Photovoltaic back BEF-302 is buied in market, and structure is PVDF/PET/PVDF, thickness 310 ± 10 microns.
The property indices of photovoltaic back is undertaken measuring by following method:
Yellowness index: detect according to GB2409-80.
Adhesive force: test according to GB/T 9286-1998 and ISO 2409-1992.
With the peel strength of EVA: carry out peel strength test by GB/T 2790-1995.
Puncture voltage: test according to GB1408-2006 and HG/T 3330.
Water vapor permeable rate: reference standard ASTM F1249-2006 " measuring the test method of plastic film and thin plate water vapo(u)r transmission with modulated infrared transducer ", at 40 DEG C, relative humidity 100% is tested.
Flame retardant rating: carry out flame retardant rating test with reference to GB2409-84 and ANSI/UL-94-1985.
Damp and hot experiment: undertaken by the regulation of IEC 61215-2005, at 85 DEG C ± 2 DEG C, carries out accelerated ageing in the humiture case of humidity (85 ± 5) %RH.The record yellowness index of sample after aging 1000h (△ YI), adhesive force and peel strength.Test its water vapor permeable rate and flame retardant rating simultaneously.
Conductive coefficient: the test carrying out conductive coefficient with reference to GB/T 3399-82.
Table 1: the performance parameter of obtained high water resistance photovoltaic back
Above test data shows, the backboard made by the present invention significantly can reduce water vapor transmittance, improve the flame retardant rating of backboard, increase the heat conductivility of backboard, simultaneously backboard of the present invention weatherability, insulating properties and with EVA caking property in also there is excellent performance, be a kind of photovoltaic back material of excellent combination property.In addition, present invention process is easy, and properties of product control stable, is applicable to large-scale production.
Claims (10)
1. a high water vapor rejection photovoltaic backboard, is characterized in that, being bondd successively by the first weathering layer, basalis, tack coat, barrier layer and the second weathering layer forms; Described barrier layer is the one in aluminium foil, iron foil, tinfoil paper, zinc paper tinsel, nickel foil, Copper Foil, silver foil, platinum foil, goldleaf, and thickness is 5 ~ 100 μm, and no more than 50 of the pin hole number of every square metre, aperture is not more than 0.3mm.
2. according to high water vapor rejection photovoltaic backboard according to claim 1, it is characterized in that, described basalis is made up of according to any proportioning one or more in PETG (PET), polybutylene terephthalate (PBT) (PBT), PEN (PEN), PBN (PBN).
3. high water vapor rejection photovoltaic backboard according to claim 1, is characterized in that, described tack coat is configured by following material and forms: matrix resin 100 mass parts, curing agent 3 ~ 25 mass parts, solvent 5 ~ 30 mass parts.
4. high water vapor rejection photovoltaic backboard according to claim 1, is characterized in that, described matrix resin is polyurethane resin, alkyd resins or acrylic resin.
5. high water vapor rejection photovoltaic backboard according to claim 1, it is characterized in that, described first weathering layer is formulated by following material: fluorine resin 100 mass parts, curing agent 5 ~ 30 mass parts, filler 10 ~ 60 mass parts, auxiliary agent 1 ~ 10 mass parts, catalyst 0.1 ~ 2 mass parts, solvent 10 ~ 250 mass parts; Thickness is 5 μm ~ 100 μm; Described second weathering layer is formulated by following material: fluorine resin 100 mass parts, curing agent 5 ~ 25 mass parts, filler 10 ~ 60 mass parts, auxiliary agent 1 ~ 10 mass parts, catalyst 0.1 ~ 2 mass parts, solvent 10 ~ 250 mass parts; Thickness is: 5 μm ~ 100 μm.
6. a kind of high water vapor rejection photovoltaic backboard according to claim 4 or 5, it is characterized in that, described curing agent is that one or more in isocyanates, amino resins, blocked isocyanate, blocked isocyanate, melamine form according to any proportioning.
7. a kind of high water vapor rejection photovoltaic backboard according to claim 4 or 5, is characterized in that, described solvent is toluene, dimethylbenzene, ethyl acetate, propyl acetate, butyl acetate or 1-Methoxy-2-propyl acetate (PMA).
8. according to a kind of high water vapor rejection photovoltaic backboard described in claim 5, it is characterized in that, described filler is made up of according to any proportioning one or more in titanium dioxide, calcium carbonate, talcum powder, silica flour, carbon black, flatting silica, mica powder, imvite; Described catalyst is organic tin catalyst.
9. a kind of high water vapor rejection photovoltaic backboard according to claim 5, is characterized in that, described auxiliary agent is by dispersant, and levelling agent, defoamer, ultraviolet absorber, light stabilizer, one or more of antioxidant form according to any proportioning.
10. a kind of high water vapor rejection photovoltaic backboard according to claim 5, it is characterized in that, described fluorine resin is vinylidene (PVDF), three fluorine-type resins (FEVE) or four fluorine-type resins (FEP), three fluorine-type resins are PVF-vinyl ethers (ester) copolymer, and four fluorine-type resins are tetrafluoroethene and alkyl vinyl ether co-polymer or tetrafluoroethene and alkyl vinyl ester copolymer.
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| CN201510261374.3A CN104868003A (en) | 2015-05-20 | 2015-05-20 | Solar photovoltaic backboard with high steam blocking performance |
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| CN201510261374.3A CN104868003A (en) | 2015-05-20 | 2015-05-20 | Solar photovoltaic backboard with high steam blocking performance |
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Cited By (9)
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| CN105355688A (en) * | 2015-11-20 | 2016-02-24 | 福州顺升科技有限公司 | Solar cell panel and back film manufacturing method thereof |
| CN106024944A (en) * | 2016-05-23 | 2016-10-12 | 江苏康博光伏电力科技有限公司 | Insulating backboard structure of solar photovoltaic module |
| CN107163511A (en) * | 2017-05-05 | 2017-09-15 | 杭州福斯特应用材料股份有限公司 | A kind of heat radiating type solar cell backboard material and preparation method |
| CN108598196A (en) * | 2018-04-19 | 2018-09-28 | 山东冬瑞高新技术开发有限公司 | A kind of high-weatherability solar cell backboard and preparation method thereof |
| CN109326666A (en) * | 2017-07-28 | 2019-02-12 | 苏州赛伍应用技术股份有限公司 | Inexpensive weathering type solar cell backboard major insulation functional membrane and backboard and solar cell module containing the major insulation functional membrane |
| CN110757916A (en) * | 2019-09-25 | 2020-02-07 | 苏州中来光伏新材股份有限公司 | High-weather-resistance and high-moisture-resistance separation type solar cell back film and preparation method thereof |
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| CN113583548A (en) * | 2021-07-28 | 2021-11-02 | 韶关瑞和环保科技有限公司 | Solar photovoltaic module |
| CN116023877A (en) * | 2023-03-30 | 2023-04-28 | 苏州弘道新材料有限公司 | High-weather-resistance solar cell transparent backboard and preparation method thereof |
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Application publication date: 20150826 |