CN102208465A - Packaging material for solar battery component - Google Patents
Packaging material for solar battery component Download PDFInfo
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- CN102208465A CN102208465A CN 201110125706 CN201110125706A CN102208465A CN 102208465 A CN102208465 A CN 102208465A CN 201110125706 CN201110125706 CN 201110125706 CN 201110125706 A CN201110125706 A CN 201110125706A CN 102208465 A CN102208465 A CN 102208465A
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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
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Abstract
The invention provides a packaging material applied to a solar battery component. The packaging material comprises a weather-resistant layer, a structure strengthening layer, a tackifying layer and a packaging layer in turn. The packaging material has the function of protecting the back surface of the component, so that a solar battery component battery plate and other insulating materials are not directly contacted with atmosphere, and the service life is prolonged; and the packaging material has high weather resistance, water vapor barrier property and electric insulativity, and the solar battery component can be used outdoors for a long time.
Description
(1) technical field
Invention provides a kind of encapsulating material that is applied to solar module.
(2) background technology
Encapsulating material is used to prepare electronics unit device assembly usually, the first device of described electronics comprises solar cell, liquid crystal panel, plasma display unit and luminescent panel etc., and described assembly is formed a plurality of electron device package by encapsulating material between front-back baseboard.Solar module for example; prebasal plate adopts the contour light transmissive material of glass; metacoxal plate adopts the backboard of high-weatherability; require assembly to use out of doors more than 20 years; this equally also requires encapsulating material can protect solar cell in front-back baseboard more than 20 years; avoid being exposed in the air and moisture content of external environment condition; require encapsulating material that front-back baseboard and electronic device are had lasting adhesion strength; and have good light transmittance energy and insulation property; can solidify fast and improve mechanical performance and creep-resistant property; handling ease, cost is lower.Therefore, encapsulating material occupies important status in the whole solar cell assembly.
In solar module, maximum encapsulating material of usefulness is ethylene-vinyl acetate copolymer (EVA) now, improve thermal endurance and creep resistant by adding crosslinking agent therein, add antioxidant and stabilizer and improve resistance to ag(e)ing, add tackifier and improve adhesion strength, basically can satisfy the solar module instructions for use, but, because the EVA resin is not high to the barrier property of moisture, in the middle of long-term out of doors the use, the moisture that permeates in the assembly tends to make tackifier to lose efficacy, thereby encapsulating material can not be lasting to the adhesion strength of front-back baseboard, can't satisfy the instructions for use more than 20 years.Therefore, must be used with the postnotum material of low steam light transmittance during with the EVA glued membrane as encapsulating material.
Simultaneously, the EVA glued membrane is very soft under the normal temperature state, with metacoxal plate notacoria lamination process in dislocation easily takes place causes the battery sheet to move even break, at present main dependence is finished manually, is mingled with foreign matter easily, greatly reduces the rate of finished products of assembly.
The production method of general solar battery component is that various materials are carried out stacked back laminating machine heat zone press seal dress according to function at present, and lamination order is followed successively by: prebasal plate glass a, one deck EVA glued membrane b1, battery sheet array c, one deck EVA glued membrane b2, metacoxal plate notacoria d (Fig. 1).Wherein, the metacoxal plate notacoria plays the effect at the protection back side in assembly.
It is not high that the present invention can solve encapsulating material water vapor rejection performance; simplify solar module production lamination process; improve the photovoltaic module rate of finished products; encapsulating material of the present invention has encapsulation function and protection assembly back side function concurrently; reduced the application of metacoxal plate notacoria; simplified assembly production lamination process has strengthened simultaneously the water vapor rejection performance of encapsulating material again, improves and keeps lasting adhesion strength.
(3) summary of the invention
The object of the invention provides a kind of encapsulating material that general encapsulation function has protection assembly back side function again concurrently that has.
The technical solution used in the present invention is:
A kind of encapsulating material of solar module comprises weathering layer, structure enhancement layer, adhesion promoting layer and encapsulated layer successively;
Described weathering layer for contain fluorine film or fluorine-containing coat, thickness is 5～50 microns; For fluorine-containing coat,, can omit tack coat between weathering layer and the structure enhancement layer if coating has enough adhesive force to the structure enhancement layer.
Described structure enhancement layer is that polyester film, thickness are 100～350 microns, and described polyester is one of following: polyethylene terephthalate (PET), polybutylene terephthalate (PBT), PEN (PEN);
Described adhesion promoting layer by PPG, PEPA, acrylic resin or epoxy resin coating form, thickness is 10～100 microns;
Described encapsulated layer is used for the glued membrane of solar cell package for existing routine, being specially with vinylacetate-ethylene copolymer, polyvinyl butyral resin, poly-succinic diethylester, branched polyethylene or metallocene catalysed polyethylene is that packaging adhesive film, the thickness that matrix resin interpolation corresponding additive is made is 0.2～0.8mm, and softening point is 35 ℃～140 ℃.Described encapsulated layer is coated on the adhesion promoting layer by the showering mode.Also can make film earlier, be fitted on the adhesion promoting layer again.
If coating is not enough to structure enhancement layer adhesive force, then increase tack coat between weathering layer and the structure enhancement layer, described tack coat by adhesive coating form, thickness is 5～50 microns; Described adhesive is one of following: PPG, PEPA, acrylic resin, epoxy resin, polyurethane, polyester, acrylate.Described tack coat can be by melt extruding the coating of coating or coating machine solvent and forming through the drying tunnel oven dry.
Make by the dry method composite methods to contain fluorine film, tack coat and structure enhancement layer strong bonded and be in the same place, fluorine-containing coat then directly is coated on the tack coat of bone dry, through drying tunnel oven dry film forming.Weathering layer is positioned at the outermost layer of encapsulating material, after being applied in the assembly, to directly face outdoor various adverse circumstances, the raw material for preparing described weathering layer can be one of following or wherein two or more mixing: polytetrafluoroethylene (PTFE), perfluoroethylene-propylene (FEP), Kynoar (PVDF), polyvinyl fluoride (PVF), tetrafluoroethene and ethylene copolymer (ETFE), tetrafluoroethene one perfluorinated alkoxy vinyl ether copolymer (PFA), chlorotrifluoroethylene and alkyl vinyl ether co-polymer, chlorotrifluoroethylene and alkyl vinyl ester copolymer, tetrafluoroethene and alkyl vinyl ester copolymer or tetrafluoroethene and alkyl vinyl ether co-polymer; Above material can be that one or more mix, and melt extrudes, and the stretching film forming also can use above material to make the method formation sealer of resin solution by printing or solvent coating.According to specific instructions for use, can also add various additives therein, as pigment, UV absorbers, coupling agent etc.
The raw material quality for preparing described encapsulated layer is composed as follows:
Preferably, it is composed as follows to prepare the raw material quality of described encapsulated layer:
The vinyl acetate content 15～50% (w/w) of described vinylacetate-ethylene copolymer.
Described light-proofness filler can be selected titanium dioxide, carbon black, hollow glass microbead, calcium carbonate superfine powder, nano silicon etc.
Described crosslinking and curing agent is the conventional crosslinking and curing agent that is used for packaging adhesive film, can be one of following or wherein two or more mixing: 2,5-dimethyl-2, two (the t-butyl peroxy)-hexanes of 5-, cross 3,5, the 5 tri-methyl hexanoic acid tert-butyl groups, adjacent, neighbour-tert-butyl group-neighbour-isopropyl-list-peroxycarbonates, adjacent, neighbour-tert-butyl group-neighbour-(2-ethylhexyl)-list-peroxycarbonates, adjacent, neighbour-tertiary pentyl-neighbour-(2-ethylhexyl)-list-peroxycarbonates, 3, two (tertiary pentyl peroxide) ethyl butyrates of 3-, 3, two (t-butyl peroxy) ethyl butyrates of 3-, 1, two (t-butyl peroxy) butane of 1-, 1, two (the t-butyl peroxy)-cyclohexanes of 1-, normal-butyl 4,4-two (tert-butyl peroxide) valerate, 1, two (t-butyl peroxy)-3 of 1-, 3, the 5-trimethyl-cyclohexane, two 2.2-(tert-butyl peroxide) butane, peroxidating two tertiary pentyls, peroxidating 2,5-dimethylhexane-2,5-di-tert-butyl peroxide or 2,5-dimethyl-2, two (benzoyl the peroxide)-hexanes of 5-.Be preferably the neighbour, neighbour-tert-butyl group-neighbour-(2-ethylhexyl)-list-peroxycarbonates or neighbour, neighbour-tertiary pentyl-neighbour-(2-ethylhexyl)-list-peroxycarbonates.
Described antioxidant is the conventional antioxidant that is used for packaging adhesive film, can be one of following or wherein two or more mixing: phenolic antioxidant: 1,3,5-three (the 4-tert-butyl group-3-hydroxyl-2,6-dimethyl benzene methyl)-1,3,5-triazine-2,4,6-(1H, 3H, 5H)-triketone, 2,2 '-methylene-two-(4-ethyl-6-tert-butyl phenol), 2,2 '-methylene-two-(4-methyl-6-tert butyl phenol), β-(4-hydroxyl-3,5-di-tert-butyl-phenyl) positive octadecyl ester of propionic acid; Phosphite ester kind antioxidant: three (2, the 4-di-tert-butyl-phenyl) phosphite esters, two (2, the 4-dicumylphenyl) pentaerythritol diphosphites, distearyl pentaerythrityl diphosphite, three (nonyl phenyl) phosphite ester; Phenols and phosphite ester kind antioxidant compound: 1,3,5-three (the 4-tert-butyl group-3-hydroxyl-2,6-dimethyl benzene methyl)-1,3,5-triazine-2,4,6-(1H, 3H, 5H)-triketone/three (2, the 4-di-tert-butyl-phenyl) phosphite ester compound, 1,3,5-three (the 4-tert-butyl group-3-hydroxyl-2,6-dimethyl benzene methyl)-1,3,5-triazine-2,4,6-(1H, 3H, 5H)-triketone/two (2, the 4-dicumylphenyl) pentaerythritol diphosphites compound; And antioxidant stabilizer 3,5-di-t-butyl-4-hydroxy-benzoic acid cetyl ester or three (1,2,2,6,6-pentamethyl-4-piperidyl) phosphite ester.Be preferably 2,2 '-methylene-two-(4-ethyl-6-tert-butyl phenol) or 1,3,5-three (the 4-tert-butyl group-3-hydroxyl-2,6-dimethyl benzene methyl)-1,3,5-triazine-2,4,6-(1H, 3H, 5H)-triketone/two (2, the 4-dicumylphenyl) pentaerythritol diphosphites compounds (mass ratio 1: 1).
Described ultraviolet absorber is the conventional ultraviolet absorber that is used for packaging adhesive film, can be one of following or wherein two or more mixing: 2,2 '-(1, the 4-phenylene) two (4H-3,1-benzoxazine-4-ketone), 2,2 '-two (3,1-benzoxazine-4-ketone), 2,2 '-tetramethylene two (3,1-benzoxazine-4-ketone), 2,2 '-decamethylene two (3,1-benzoxazine-4-ketone), 2,2 '-TOPOT 2,2 (3,1-benzoxazine-4-ketone), 2,2 '-di-2-ethylhexylphosphine oxide (3,1-benzoxazine-4-ketone), 1,3,5-three (3,1-benzoxazine-4-ketone-2-yl) benzene, 2,4,6-three (3,1-benzoxazine-4-ketone-2-yl) naphthalene, 2,8-dimethyl-4H, and the 6H-benzo (1,2-d; 5; 4-d ') two (1; 3)-oxazines-4; the 6-diketone; 6 '; two (2-methyl-the 4H of 6-sulfonyl; 3; 1-benzoxazine-4-ketone); 6; 7 '-di-2-ethylhexylphosphine oxide (2-methyl-4H; 3; 1-benzoxazine-4-ketone); 2-hydroxyl-4-methoxy benzophenone; 2; the 4-dihydroxy benaophenonel; 2-hydroxyl-4-n-octyloxy benzophenone; 2-hydroxyl-4-methoxyl group-2 '-carboxyl benzophenone; 2; 2 '-dihydroxy-4; 4 '-dimethoxy-benzophenone; 2-hydroxyl-4-benzoyl oxygen base benzophenone; 2; 2 '; 4; 4 '-tetrahydroxybenzophenone; 2; 2 '-dihydroxy-4; 4 '-dimethoxy-benzophenone; 2-hydroxyl-5-chlorobenzophenone; two-(2-methoxyl group-4-hydroxyl-5-benzoyl phenyl) methane; 2-(2 '-hydroxy phenyl) BTA; 2-(2 '-hydroxy-5-methyl base phenyl) BTA; 2-(2 '-hydroxy-5-methyl base phenyl)-5-carboxylic acid butyl ester BTA; 2-(2 '-hydroxyl-5 '-aminomethyl phenyl)-5; 6-dichloro BTA; 2-(2 '-hydroxy-5-methyl base phenyl)-5-ethyl sulphonyl BTA; 2-(2 '-hydroxyl-5 '-tert-butyl-phenyl)-5-chlorobenzotriazole; 2-(2 '-hydroxyl-5 '-tert-butyl-phenyl) BTA; 2-(2 '-hydroxyl-5 '-aminophenyl) BTA; 2-(2 '-hydroxyl-3 '; 5 '-3,5-dimethylphenyl) BTA; 2-(2 '-methyl-4 '-hydroxy phenyl) BTA; 2-(2 '-hydroxyl-5-carboxylic acid phenyl) BTA ethyl ester; 2-(2 '-hydroxyl-3 ' methyl-5 '-tert-butyl-phenyl) BTA; 2-(2 '-octadecyl oxygen base-3 '; 5 '-3,5-dimethylphenyl)-the 5-methylbenzotrazole; 2-(2 '-hydroxyl-3 '; 5 '-di-tert-butyl-phenyl)-the 5-chlorobenzotriazole; 2-(2 '-hydroxyl-the 3 '-tert-butyl group-5 '-aminomethyl phenyl)-5-chlorobenzotriazole; 2-(2 '-hydroxyl-5 '-methoxyphenyl) BTA; 2-(2 '-hydroxyl-3 '; 5 '-di-tert-butyl-phenyl)-the 5-chlorobenzotriazole; 2-(2 '-hydroxyl-5 '-cyclohexyl phenyl) BTA; 2-(2 '-hydroxyl-4 '; 5 '-3,5-dimethylphenyl)-5-carboxylic acid BTA butyl ester; 2-(2 '-hydroxyl-3 '; 5 '-dichlorophenyl) BTA; 2-(2 '-hydroxyl-4 '; 5 '-dichlorophenyl) BTA; 2-(2 '-hydroxyl-3 ', 5 '-3,5-dimethylphenyl)-5-ethyl sulphonyl BTA; 2-(2 '-hydroxyl-4 '-octyloxyphenyl) BTA; 2-(2 '-hydroxyl-5 '-methoxyphenyl)-5-methylbenzotrazole; 2-(2 '-hydroxyl-5 '-aminomethyl phenyl)-5-carboxylate BTA; 2-(2 '-hydroxyl-5 '-uncle's octyl phenyl) BTA or 2-(2 '-acetoxyl group-5 '-aminomethyl phenyl) BTA.Be preferably 2,2 '-tetramethylene two (3,1-benzoxazine-4-ketone), 2-(2 '-hydroxy-5-methyl base phenyl) BTAs, 2,2 '-dihydroxy-4,4 '-dimethoxy-benzophenone.
Described light stabilizer is the conventional light stabilizer that is used for packaging adhesive film, can be one of following or wherein two or more mixing: decanedioic acid two-2,2,6,6-tetramethyl piperidine alcohol ester, two-1-alkoxyl in the last of the ten Heavenly stems-2,2,6,6-tetramethyl piperidine-4-alcohol sebacate, succinic acid and 4-hydroxyl-2,2,6, the polymer of 6-tetramethyl-1-piperidines alcohol, N, N '-two (2,2,6,6-tetramethyl-4-piperidyl)-1,6-hexamethylene diamine and 2,4-two chloro-6-(1,1,3, the 3-tetramethyl butyl) amino-1,3, the polymer of 5-triazine, N, N '-two (2,2,6,6-tetramethyl-4-piperidyl)-1,6-hexamethylene diamine and 2, the polymer of 4-two chloro-6-(4-morpholinyl)-1,3,5-triazines, N, N '-two (1,2,2,6,6-pentamethyl-4-piperidyl)-1,6-hexamethylene diamine and morpholine-2,4,6-three chloro-1,3, the polymer of 5-triazine, two (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate/methyl isophthalic acid, 2,2,6,6-pentamethyl-4-piperidyl sebacate compound or succinic acid and (4-hydroxyl-2,2,6,6-tetramethyl-1-piperidines alcohol) polymer.Be preferably two-1-alkoxyl in the last of the ten Heavenly stems-2,2,6,6-tetramethyl piperidine-4-alcohol sebacate, N, N '-two (1,2,2,6,6-pentamethyl-4-piperidyl)-1,6-hexamethylene diamine and morpholine-2,4,6-three chloro-1,3, the polymer of 5-triazine or succinic acid and (4-hydroxyl-2,2,6,6-tetramethyl-1-piperidines alcohol) polymer.
Encapsulating material of the present invention has general encapsulation function and has protection assembly back side function again concurrently.As Fig. 1, in general solar module, five-layer structure is arranged, and use the solar module (as Fig. 2) of encapsulating material b2 of the present invention to have only four-layer structure, reduced the application of metacoxal plate notacoria, simplified assembly production lamination process helps the reduction of production cost, avoid the weak problem of encapsulating material and metacoxal plate cohesive force, improved solar module useful life.
Encapsulating material of the present invention has the function at the protection assembly back side simultaneously; solar module battery sheet and other insulating material are not directly contacted with atmosphere increase its useful life; the weatherability of this encapsulating material, water vapor barrier property and electrical insulating property are good, can guarantee that solar module uses out of doors for a long time.
(4) description of drawings
Fig. 1 is the structure of existing general solar module;
Fig. 2 is the structure of the solar module of use encapsulating material of the present invention;
Fig. 3 is the structure of encapsulating material of the present invention.
(5) embodiment
The present invention is described further below in conjunction with specific embodiment, but protection scope of the present invention is not limited in this:
Embodiment 1:
Use coating line, be coated with polyurethane adhesive (B) in Polyethyleneglycol Terephthalate (PET) film (A) one side, after the drying tunnel oven dry, compound one deck polyvinyl fluoride (PVF) film (C) is as weathering layer, then at another side coated polyester polyol resin (D), applying one deck vinylacetate-ethylene copolymer (EVA) film (E), last rolling (structure is referring to Fig. 3).
Polyethyleneglycol Terephthalate (PET) film adopts S10 (production of toray Co., Ltd.), 250 microns of thickness; Polyurethane adhesive is selected Hankel LA 2692 for use, and the dry film coating weight is 12g/m
2Polyvinyl fluoride (PVF) film is selected for use
SP (du pont company), thickness are 25 microns; Polyester polyol resin is selected GK360 (Co., Ltd. is spun by Japanese Japan) for use, and coating thickness is 5 microns; The F806 that eva film selects for use the Hangzhou Foster to produce, thickness is 0.45mm.
The above encapsulating material is applied in the solar energy crystal silicon battery assembly, lamination order is followed successively by from the bottom to top: ultra-clear glasses, one deck packaging EVA adhesive film, battery sheet array, encapsulating material of the present invention, finish encapsulation process through laminating machine laminating, load onto frame and terminal box then, obtain solar module A (structure is referring to Fig. 1).Use traditional handicraft, lamination order is followed successively by from the bottom to top: ultra-clear glasses (a), one deck packaging EVA adhesive film (b1), battery sheet array (c), one deck packaging EVA adhesive film (b2), backboard (d), finish encapsulation process through laminating machine laminating, load onto frame and terminal box then, obtain solar module B.Carry out hydrothermal aging test and the test of anti-ultraviolet test, comparative result such as table 1 according to 61215 pairs of two assemblies of standard IEC.
Table 1
Embodiment 2:
The structure enhancement layer adopts PEN (PEN) film TEONEX (Japanese Supreme Being people company), 200 microns of thickness; Fluorine-containing coat is to cooperate titanium dioxide, curing agent and auxiliary agent to form through the coating machine coating by fluororesin flumiflon (Asahi Glass company), and thickness is 30 microns; Adhesion promoting layer adopts polyether polyol resin
1550 (Bayer chemistry), coating thickness is 50 microns; The first melt of ethylene-vinyl acetate (EVA) process extruder die is melted extrusion coated on adhesion promoting layer, and coating thickness is 0.8mm.
In ethylene-vinyl acetate (EVA) resin of coating: EVA (wherein VA (vinylacetate) mass content is 43% (du pont company)) content 95%, ultraviolet absorber 2-(the 2 '-hydroxy-5-methyl base phenyl) BTA of adding 0.5% (the many He Sheng in Nanjing Science and Technology Ltd.), 0.5% antioxidant 1,3,5-three (the 4-tert-butyl group-3-hydroxyl-2,6-dimethyl benzene methyl)-1,3,5-triazine-2,4,6-(1H, 3H, 5H)-triketone/two (2, the 4-dicumylphenyl) pentaerythritol diphosphites compound (mass ratio 1: 1; The special company of U.S.'s cyanogen), 2.5% light stabilizer succinic acid and (4-hydroxyl-2,2,6,6-tetramethyl-1-piperidines alcohol) polymer (U.S. cyanogen special company), 1.5% crosslinking and curing agent neighbour, neighbour-tert-butyl group-neighbour-(2-ethylhexyl)-list-peroxycarbonates (Guangzhou power (giant dragon) rubber raw materials trade Co., Ltd).
Encapsulating material of the present invention detects performance such as table 2 after solidifying through laminating machine laminating:
Table 2
Embodiment 3:
The structure enhancement layer adopts polybutylene terephthalate (PBT) film F R1 (U.S. GE company), and thickness is 320 microns; Tack coat forms by coating machine coating polyurethane adhesive TSB-500 (big Japanese ink company), and thickness is 40 microns; On tack coat, be coated with fluorine resin
GK570 (Da Jin fluorine chemistry company) forms weathering layer, adds pigment titanium white R906 (E.I.Du Pont Company) and curing agent N3300 (Bayer chemistry) in the fluorine resin, and thickness is 10 microns; Adhesion promoting layer adopts PEPA
AD 2047 (Bayer chemistry) forms through coating, 15 microns of coating thicknesss; The first melt of ethylene-vinyl acetate (EVA) process extruder die is melted extrusion coated on adhesion promoting layer, and coating thickness is 0.3mm.
In ethylene-vinyl acetate (EVA) resin: EVA (VA (vinylacetate) mass content is 18% (du pont company)) content is 99%, adds 0.1% ultraviolet absorber 2,2 '-tetramethylene two (3,1-benzoxazine-4-ketone) (the many He Sheng in Nanjing Science and Technology Ltd.), 0.1% light stabilizer N, N '-two (1,2,2,6,6-pentamethyl-4-piperidyl)-1,6-hexamethylene diamine and morpholine-2,4,6-three chloro-1,3, the polymer of 5-triazine (Beijing Big Dipper Co., Ltd), 0.2% antioxidant 1,3,5-three (the 4-tert-butyl group-3-hydroxyl-2,6-dimethyl benzene methyl)-1,3,5-triazine-2,4,6-(1H, 3H, 5H)-triketone/two (2, the 4-dicumylphenyl) pentaerythritol diphosphites compound (mass ratio 1: 1; The special company of U.S.'s cyanogen), 0.6% crosslinking and curing agent neighbour, neighbour-tertiary pentyl-neighbour-(2-ethylhexyl)-list-peroxycarbonates (this (giant dragon) rubber raw materials trade Co., Ltd of Guangzhou power).
Embodiment 4:
The structure enhancement layer adopts polyethylene terephthalate (PET) film
(Dupont), thickness are 250 microns; Tack coat forms by coating machine coated polyester resin GK360 (company is spun by Japanese Japan), wherein adds curing agent, and thickness is 25 microns; By the compound Kynoar of dry method composite methods (PVDF) film (French A Kema company), as weathering layer, the PVDF film thickness is 25 microns on tack coat; Adhesion promoting layer adopts acrylate
7600 (U.S. Celanese Corp.) form through coating, 30 microns of coating thicknesss; Polyvinyl butyral resin (PVB) resin
(the laughable upright company of Japan) is used as encapsulated layer, adds various auxiliary agents and crosslinking agent in advance, behind the film extrusion, is fitted on the adhesion promoting layer, and thickness is 0.45mm.
In polyvinyl butyral resin (PVB) resin: PVB content 99%, add 0.1% ultraviolet absorber 2,2 '-dihydroxy-4,4 '-dimethoxy-benzophenone (the many He Sheng in Nanjing Science and Technology Ltd.), 0.1% light stabilizer is two-1-alkoxyl in the last of the ten Heavenly stems-2,2,6,6-tetramethyl piperidine-4-alcohol sebacate (Beijing Big Dipper Co., Ltd), 0.2% antioxidant 2,2 '-methylene-two-(4-ethyl-6-tert-butyl phenol) (the special company of U.S.'s cyanogen), 0.6% crosslinking and curing agent neighbour, neighbour-tertiary pentyl-neighbour-(2-ethylhexyl)-list-peroxycarbonates (this (giant dragon) rubber raw materials trade Co., Ltd of Guangzhou power).
For embodiment 3 and embodiment 4,, the results are shown in Table 3 according to international standard IEC 60664-1 and IEC 61730 its electrical properties of test:
Table 3
Embodiment 5:
The structure enhancement layer adopts polyethylene terephthalate (PET) film
(Dupont), thickness are 188 microns; Tack coat forms by coating machine coated polyester resin GK360 (company is spun by Japanese Japan), wherein adds curing agent, and thickness is 25 microns; By the compound Kynoar of dry method composite methods (PVDF) film (French A Kema company), as weathering layer, the PVDF film thickness is 25 microns on tack coat; Adhesion promoting layer adopts polyurethane resin
1600 (U.S. Celanese Corp.) form through coating, 30 microns of coating thicknesss; Applying EVA glued membrane F806 (Hangzhou Foster photovoltaic material limited company) on the adhesion promoting layer, thickness is 0.4mm.
Embodiment 6:
The structure enhancement layer adopts polyethylene terephthalate (PET) film
(Dupont), thickness are 188 microns; Tack coat forms by coating machine coated polyester resin GK360 (company is spun by Japanese Japan), wherein adds curing agent, and thickness is 25 microns; By the compound Kynoar of dry method composite methods (PVDF) film (French A Kema company), as weathering layer, the PVDF film thickness is 25 microns on tack coat; Adhesion promoting layer adopts polyurethane resin
1600 (U.S. Celanese Corp.) form through coating, 30 microns of coating thicknesss; Extrusion coated on the adhesion promoting layer is the encapsulated layer of matrix resin with ethylene-vinyl acetate (EVA), and coating thickness is 0.45mm.
Encapsulated layer composed as follows: EVA (wherein VA (vinylacetate) mass content is 33% (du pont company)) content is 80%, mixes light-proofness filler titanium dioxide (R906, du pont company) 19%, add 0.1% ultraviolet absorber 2 again, 2 '-tetramethylene two (3,1-benzoxazine-4-ketone) (the many He Sheng in Nanjing Science and Technology Ltd.), 0.1% light stabilizer N, N '-two (1,2,2,6,6-pentamethyl-4-piperidyl)-1,6-hexamethylene diamine and morpholine-2,4,6-three chloro-1,3, the polymer of 5-triazine (Beijing Big Dipper Co., Ltd), 0.2% antioxidant 1,3,5-three (the 4-tert-butyl group-3-hydroxyl-2,6-dimethyl benzene methyl)-1,3,5-triazine-2,4,6-(1H, 3H, 5H)-triketone/two (2, the 4-dicumylphenyl) pentaerythritol diphosphites compound (mass ratio 1: 1; The special company of U.S.'s cyanogen), 0.6% crosslinking and curing agent neighbour, neighbour-tertiary pentyl-neighbour-(2-ethylhexyl)-list-peroxycarbonates (this (giant dragon) rubber raw materials trade Co., Ltd of Guangzhou power).
Embodiment 7:
The structure enhancement layer adopts PEN (PEN) film TEONEX (Japanese Supreme Being people company), 200 microns of thickness; Fluorine-containing coat is to cooperate titanium dioxide, curing agent and auxiliary agent to form through the coating machine coating by fluororesin flumiflon (Asahi Glass company), and thickness is 30 microns; Adhesion promoting layer adopts polyether polyol resin
1550 (Bayer chemistry), coating thickness is 50 microns; It is extrusion coated on adhesion promoting layer that encapsulated layer adopts the first melt of branched polyethylene (brPE) process extruder die to melt, and coating thickness is 0.5mm.
In the encapsulated layer of coating, branched polyethylene (brPE) content 95%, its softening point is 40 ℃--120 ℃, ultraviolet absorber 2-(the 2 '-hydroxy-5-methyl base phenyl) BTA of adding 0.5% (the many He Sheng in Nanjing Science and Technology Ltd.), 0.5% antioxidant 1,3,5-three (the 4-tert-butyl group-3-hydroxyl-2,6-dimethyl benzene methyl)-1,3,5-triazine-2,4,6-(1H, 3H, 5H)-triketone/two (2, the 4-dicumylphenyl) pentaerythritol diphosphites compound (mass ratio 1: 1; The special company of U.S.'s cyanogen), 2.5% light stabilizer succinic acid and (4-hydroxyl-2,2,6,6-tetramethyl-1-piperidines alcohol) polymer (U.S. cyanogen special company), 1.5% crosslinking and curing agent neighbour, neighbour-tert-butyl group-neighbour-(2-ethylhexyl)-list-peroxycarbonates (Guangzhou power (giant dragon) rubber raw materials trade Co., Ltd).
Embodiment 8:
Solar module is made, with material (structure is referring to Fig. 2) stacked together in the following order, prebasal plate glass a adopts the thick ultra-clear glasses of 0.5mm (Zhejiang Follett, Mary Parker glass mirror industry Co., Ltd), one deck EVA glued membrane b1 (F806, Hangzhou Foster photovoltaic material Co., Ltd), polycrystal silicon cell sheet array c (German Q-cell company), b2 adopts embodiment 5 respectively, the encapsulating material of embodiment 6 and embodiment 7, stacked good material put into 140 ℃ laminating machine lamination, laminating technology is for after vacuumizing 6 minutes, lamination 12 minutes, after taking out cooling, carry out chamfered edge and rim frame, the frame silica gel sealing, obtain assembly M-5 respectively, M-6 and M-7, wherein M-6 adopts the encapsulating material of embodiment 6, has the characteristics of high reflectance.
The solar module of above gained is put into two 85 hydrothermal aging casees, carried out ageing test 1000 hours, take out finishing after, observe the assembly cosmetic variation, and test its power output variation according to IEC61215, as table 4:
Table 3
As mentioned above, the every performance of encapsulating material of the present invention is applicable to existing solar cell assembly manufacturing process fully, has general encapsulation function and has protection assembly back side function again concurrently.In the application of solar module, reduced the application of metacoxal plate notacoria, simplified assembly production lamination process helps the reduction of production cost, has avoided the weak problem of encapsulating material and metacoxal plate cohesive force, has improved solar module useful life.
Claims (5)
1. the encapsulating material of a solar module comprises weathering layer, structure enhancement layer, adhesion promoting layer and encapsulated layer successively;
Described weathering layer for contain fluorine film or fluorine-containing coat, thickness is 5～50 microns;
Described structure enhancement layer is that polyester film, thickness are 100～350 microns, and described polyester is one of following: polyethylene terephthalate, polybutylene terephthalate, PEN;
Described adhesion promoting layer by PPG, PEPA, acrylic resin or epoxy resin coating form, thickness is 10～100 microns;
Described encapsulated layer is for being that packaging adhesive film, the thickness that matrix resin is made is 0.3～0.8mm with vinylacetate-ethylene copolymer, polyvinyl butyral resin, poly-succinic diethylester, branched polyethylene or metallocene catalysed polyethylene, and softening point is 35 ℃～140 ℃.
2. encapsulating material as claimed in claim 1 is characterized in that also comprising tack coat between described weathering layer and the structure enhancement layer, described tack coat by adhesive coating form, thickness is 5～50 microns; Described adhesive is one of following: PPG, PEPA, acrylic resin, epoxy resin, polyurethane, polyester, acrylate.
3. encapsulating material as claimed in claim 1, the raw material that it is characterized in that preparing described weathering layer are one of following or wherein two or more mixing: polytetrafluoroethylene, perfluoroethylene-propylene, Kynoar, polyvinyl fluoride, tetrafluoroethene and ethylene copolymer, tetrafluoroethene-perfluorinated alkoxy vinyl ether copolymer, chlorotrifluoroethylene and alkyl vinyl ether co-polymer, chlorotrifluoroethylene and alkyl vinyl ester copolymer, tetrafluoroethene and alkyl vinyl ester copolymer, tetrafluoroethene and alkyl vinyl ether co-polymer.
4. encapsulating material as claimed in claim 1, the raw material quality that it is characterized in that preparing described encapsulated layer is composed as follows:
5. encapsulating material as claimed in claim 4, the raw material quality that it is characterized in that preparing described encapsulated layer is composed as follows:
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