CN205092253U

CN205092253U - Novel environment -friendly solar backplane

Info

Publication number: CN205092253U
Application number: CN201520793556.0U
Authority: CN
Inventors: 邵名巍; 周联民
Original assignee: CHANGSHU TOP SOLAR MATERIAL Co Ltd
Current assignee: CHANGSHU TOP SOLAR MATERIAL Co Ltd
Priority date: 2015-10-14
Filing date: 2015-10-14
Publication date: 2016-03-16
Anticipated expiration: 2025-10-14

Abstract

The utility model provides a novel environment -friendly solar backplane, belongs to solar PV cells technical field. Including basic unit, first resistant time layer, resistant layer, first tie coat and the second tie coat of waiting of second, first resistant time layer be fluorine -containing copolymer layer, the combination is on the surface of one side of basic unit, the resistant layer of waiting of second be polyolefin copolymer layer, the combination is on the surface of the opposite side of basic unit, first tie coat be located between basic unit and the first resistant time layer, the second tie coat be located that basic unit and second are resistant waits between the layer. Surface through the both sides in the basic unit respectively the compound the 1st resistant layer of waiting with the 2nd resistant wait layer and the composite construction who obtains has good weatherability, aging resistance to insulating properties is excellent, anti -soil ability reinforce, and the steam transmissivity is little, and the partial discharge ability is greater than more than the 1000V, reducible pollution to the environment reduces the harmful effects that lead to the fact the health of operating the workman, and is longe -lived, reduces the production cost.

Description

Novel environment-friendly solar energy backboard

Technical field

The utility model belongs to solar-energy photo-voltaic cell technical field, is specifically related to a kind of novel environment-friendly solar energy backboard.

Background technology

Solar energy backboard is positioned at the back side of solar panel, plays protection and supporting role to cell piece, requires to have reliable insulating properties, water preventing ability, resistance to ag(e)ing.Solar energy backboard generally has three-decker; outer protective layer is fluoropolymer layer; there is good environment resistant erosiveness; intermediate layer is can the polyester film layer of biaxial tension; there is good insulation property and mechanical property; internal layer is fluoropolymer layer or EVA copolymer layer, has good caking property with encapsulating material EVA.In the prior art, PET film and fluorine film and polyolefin film all do not bond by hot composition process, and this not only causes very large restriction to the production of PET composite membrane, also produce harmful effect to the performance of Related product.The preparation method of domestic and international back veneer material at present, mostly smear polyurethane adhesive respectively on two surfaces of PET Obstruct membrane, and then distinguish compound fluorine film and fluorine film, fluorine film and EVA film, fluorine film and PE film, this preparation method mainly solves the caking property problem of fluorine film and PET film, PET film and EVA (PE) film, but still existing defects: adopt stage composite means, namely first PET film a surface coating and after a compound skim, again at another surface coating of PET film and another tunic of compound, operation more complicated; Domestic polyurethane adhesive all needs import, makes the production cost of solar energy backboard too high; Because polyurethane adhesive is solvent based adhesive, need to use a large amount of organic solvents, and these organic solvents can cause certain pollution to environment, and also can produce harmful effect to the health of operator, easily cause the problem of safety and environmental protection aspect; Described polyurethane glue-line can be degraded in the process of Long-Time Service, the phenomenon causing interlaminar separation He come off, and then solar module can be made to be scrapped because losing protection.

In prior art, disclosed in Chinese invention patent application publication No. CN102001208A a kind of " insulating back panel of solar photovoltaic assembly ", its cross-section structure is followed successively by weathering layer from top to bottom, adhesive layer, electric insulation layer, adhesive layer and weathering layer, this patent application has done improvement to weathering layer, to improve water vapor rejection effect and UV resistant performance, thus the useful life of solar photovoltaic assembly can be ensured, but the material of its adhesive layer is still polyurethane binder (last column see specification [0024] paragraph), harmful effect solar energy backboard caused by polyurethane binder cannot be avoided equally.

In view of above-mentioned prior art, be necessary to be improved the structure of existing solar energy backboard, for this reason, the applicant has done useful design, and technical scheme described below produces under this background.

Summary of the invention

The purpose of this utility model is to provide a kind of novel environment-friendly solar energy backboard, and production cost is low, and environmental pollution is few, and has good weatherability, resistance to ag(e)ing and insulating properties.

The purpose of this utility model reaches like this, a kind of novel environment-friendly solar energy backboard, it is characterized in that: comprise basic unit, the first weathering layer, the second weathering layer, the first tack coat and the second tack coat, the first described weathering layer is fluorinated copolymer layer, be combined in the surface of the side of basic unit, the second described weathering layer is polyolefin copolymer nitride layer, be combined in the surface of the opposite side of basic unit, the first described tack coat is between basic unit and the first weathering layer, and the second described tack coat is between basic unit and the second weathering layer.

In a specific embodiment of the present utility model, described basic unit is any one or more than one the combination in PETG, polybutylene terephthalate, poly-how naphthalate.

In another specific embodiment of the present utility model, the first described weathering layer is any one or more than one the combination in polytetrafluoroethylene, polyvinylidene fluoride, polyvinyl fluoride.

In another specific embodiment of the present utility model, the second described weathering layer is one or more the combination in polyethylene, polypropylene, ethylene-ethyl acetate copolymer.

In another specific embodiment of the present utility model, the first described tack coat and the second tack coat are ethylene copolymer tack coat.

Also have in a specific embodiment of the present utility model, the ethylene copolymer in described ethylene copolymer tack coat comprises the copolymer of ethene and alhpa olefin.

More of the present utility model and in a specific embodiment, the ethylene copolymer in described ethylene copolymer tack coat is ethene/(methyl) acrylic copolymer, ethene/(methyl) acrylic acid C _1-6the ethylene linkage unsaturated carboxylic acid of the copolymer of alkane ester, ethene/except described (methyl) acrylic acid or the copolymer of its ester or acid anhydrides, ethene and two or more be selected from (methyl) acrylic acid, (methyl) acrylic acid C _1-6the blend that the ternary that alkane ester or the ethylene linkage unsaturated carboxylic acid except described (methyl) acrylic acid or its ester or acid anhydrides are formed or multiple copolymer or above-mentioned copolymer are formed with arbitrary proportion.

In an of the present utility model and then specific embodiment, the weight percentage of the ethene in described ethylene copolymer tack coat is 60 ~ 90%, is preferably 65 ~ 88%, is more preferably 70 ~ 85%.

The utility model is owing to have employed said structure, compared with prior art, the beneficial effect had is: by the surface of the both sides in basic unit compound first weathering layer and the second weathering layer and the composite construction obtained respectively, there is good weatherability, resistance to ag(e)ing, and excellent insulation performance, stain resistance is strong, and water vapor transmittance is little, and partial discharge ability is greater than more than 1000V; Avoid the polyurethanes binding agent in conventional backing plate technique, the pollution to environment can be reduced, reduce the harmful effect that the health of operator is caused, and more than the life to 25 year that can also make backboard; In addition, can also processing step be reduced, reduce production cost.

Accompanying drawing explanation

Fig. 1 is the generalized section of solar energy backboard described in the utility model.

In figure: 1. basic unit; 2. the first weathering layer; 3. the second weathering layer; 4. the first tack coat; 5. the second tack coat.

Embodiment

Applicant will describe in detail embodiment of the present utility model below by reference to the accompanying drawings; but applicant is not the restriction to technical scheme to the description of embodiment, any changing in the form rather than substance according to the utility model design all should be considered as protection range of the present utility model.

Refer to Fig. 1, the utility model relates to a kind of novel environment-friendly solar energy backboard, comprises basic unit 1, first weathering layer 2, second weathering layer 3, first tack coat 4 and the second tack coat 5.The first described weathering layer 2 is fluorinated copolymer layer, is combined in the surface of the side of basic unit 1; The second described weathering layer 3 is polyolefin copolymer nitride layer, is combined in the surface of the opposite side of basic unit 1.The first described tack coat 4 is between basic unit 1 and the first weathering layer 2, and the second described tack coat 5 is between basic unit 1 and the second weathering layer 3.In the present embodiment, described basic unit 1 is any one or more than one the combination in PETG, polybutylene terephthalate, poly-how naphthalate; The first described weathering layer 2 is any one or more than one the combination in polytetrafluoroethylene, polyvinylidene fluoride, polyvinyl fluoride; The second described weathering layer 3 is one or more the combination in polyethylene, polypropylene, ethylene-ethyl acetate copolymer; The first described tack coat 4 and the second tack coat 5 are ethylene copolymer tack coat, also known as ethylene copolymer layer or ethylene copolymer intermediate layer.Further, ethylene copolymer in described ethylene copolymer tack coat comprises the copolymer of ethene and alhpa olefin, wherein, the weight percentage of ethene is 60 ~ 90%, preferably 65 ~ 88%, more preferably 70 ~ 85%, such as, ethene/(methyl) acrylic copolymer, ethene/(methyl) acrylic acid C can be selected from _1-6the ethylene linkage unsaturated carboxylic acid of the copolymer of alkane ester, ethene/except described (methyl) acrylic acid or the copolymer of its ester or acid anhydrides, ethene and two or more be selected from (methyl) acrylic acid, (methyl) acrylic acid C _1-6the blend that the ternary that alkane ester or the ethylene linkage unsaturated carboxylic acid except described (methyl) acrylic acid or its ester or acid anhydrides are formed or multiple copolymer or above-mentioned copolymer are formed with arbitrary proportion.

Be integrally constituted by extruding the bonding mode of compound between described basic unit 1 and the first weathering layer 2 and the second weathering layer 3, be described with the example that is superimposed as between basic unit 1 and the first weathering layer 2, concrete folding method comprises the steps:

S1) provide fluoro-containing copolymer film as the first weathering layer 2;

S2) provide the polyester film of biaxial tension as basic unit 1;

S3) melt extrude on the gap of above-mentioned two kinds of films by ethylene copolymer first tack coat 4, the melt temperature of described ethylene copolymer is more than 270 DEG C or 270 DEG C;

S4) described fluoro-containing copolymer film and polyester film are overlapped into one using described ethylene copolymer as intermediate layer.

The solar energy insulating back panel consisted of above-mentioned steps, its finished product form is membranaceous for rolling up.In use insulating back panel membranaceous for volume is launched, be cut into the sheet identical with the size specification of solar battery sheet, and then insulating back panel is placed on the below of solar battery sheet, and carries out combining with solar energy glass, PUR (EVA) and aluminium frame and form solar photovoltaic assembly.This solar photovoltaic assembly is owing to adding insulating back panel; insulation protection can be carried out to the power supply after solar battery sheet work; the potential safety hazard of solar photovoltaic assembly is reduced greatly, uses more reliable, simultaneously can also by more than the life to 25 of solar facilities year.Adopt the method extruding compound directly to prepare backboard, both to avoid in conventional method polyurethane adhesive to the pollution of environment, again can a straight forming, thus can preparation process be reduced, enhance productivity, reduce production cost.

For improving the adhesion strength of above-mentioned lamination further, surface treatment can also be carried out to the polyester film of fluoro-containing copolymer film, biaxial tension or both, described surface treatment can be various surface treatment method known in the art, such as corona treatment, primary coat process etc.Below, a concrete production example is provided.First with corona treatment equipment, corona treatment is carried out to the polyester film of fluoro-containing copolymer film, biaxial tension and polyolefin copolymer film, then on the continuous Extrusion Coating/equipment complex of multimode head, place fluoro-containing copolymer film to unreel as first, ethylene copolymer is melt extruded in an extruder and (is followed successively by 190 DEG C from being fed to die head temperature, 230 DEG C, 260 DEG C, 290 DEG C, 320 DEG C) and be attached in the interface between fluoro-containing copolymer film and the polyester film of biaxial tension, enter second after compressing cooling and extrude recombination region, polyolefin copolymer film is unreeled as the 3rd, ethylene copolymer is melt extruded in an extruder and (is followed successively by 190 DEG C from being fed to die head temperature, 230 DEG C, 260 DEG C, 290 DEG C, 320 DEG C) and be attached in the interface between the polyester film of biaxial tension and polyolefin copolymer film, compress the solar energy backboard that rolling after cooling obtains the polyester thin layer/polyolefin copolymer Rotating fields of fluoropolymer layer/biaxial tension.

Claims

1. a novel environment-friendly solar energy backboard, it is characterized in that: comprise basic unit (1), first weathering layer (2), second weathering layer (3), first tack coat (4) and the second tack coat (5), described the first weathering layer (2) is fluorinated copolymer layer, be combined in the surface of the side of basic unit (1), described the second weathering layer (3) is polyolefin copolymer nitride layer, be combined in the surface of the opposite side of basic unit (1), described the first tack coat (4) is positioned between basic unit (1) and the first weathering layer (2), described the second tack coat (5) is positioned between basic unit (1) and the second weathering layer (3), described the first tack coat (4) and the second tack coat (5) are ethylene copolymer tack coat.

2. novel environment-friendly solar energy backboard according to claim 1, is characterized in that described basic unit (1) is PETG, any one in polybutylene terephthalate, poly-how naphthalate.

3. novel environment-friendly solar energy backboard according to claim 1, is characterized in that described the first weathering layer (2) is polytetrafluoroethylene, any one in polyvinylidene fluoride, polyvinyl fluoride.

4. novel environment-friendly solar energy backboard according to claim 1, is characterized in that described the second weathering layer (3) is polyethylene, one in polypropylene, ethylene-ethyl acetate copolymer.