CN102529259A - High-cohesiveness back film of solar cell and processing technology thereof - Google Patents
High-cohesiveness back film of solar cell and processing technology thereof Download PDFInfo
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- CN102529259A CN102529259A CN2010106237690A CN201010623769A CN102529259A CN 102529259 A CN102529259 A CN 102529259A CN 2010106237690 A CN2010106237690 A CN 2010106237690A CN 201010623769 A CN201010623769 A CN 201010623769A CN 102529259 A CN102529259 A CN 102529259A
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Abstract
The invention relates to a high-cohesiveness back film of a solar cell, which is characterized by comprising a fluororesin polymer layer, a base layer and a polyolefin bonding layer, wherein a high-polymer adhesive layer is arranged between the fluororesin polymer layer and the base layer, the high-polymer adhesive layer is arranged between the base layer and the polyolefin bonding layer, and fluorosilicone type formed film layers are arranged on the two sides of the fluororesin polymer layer. The polyolefin bonding layer is compounded onto the back film disclosed by the invention, and the two are made into an integrated structure so as to be conductive to bonding with other parts and enable the production of the solar cell to be simpler and more convenient.
Description
Technical field:
The present invention relates to a kind of assembly that is used for solar cell, relate in particular to a kind of solar cell notacoria, relate to a kind of technology of processing this notacoria simultaneously with high-adhesion.
Background technology:
Solar panel is a laminated construction normally, mainly comprises surface layer of glass, EVA sealant, solar cell piece, EVA sealant and solar cell notacoria, and wherein solar cell piece is by two-layer EVA sealant sealed envelope.The main effect of solar cell notacoria is the overall mechanical strength that improves solar panel, can prevent that in addition water vapor permeable from sealant, influencing the service life of battery sheet.In order to improve the overall performance of notacoria, occurred being directed against notacoria in a large number in the prior art and carried out improved plan.For example; One Chinese patent application number was that May 14, publication number in 2008 are the application for a patent for invention of CN101177514 for CN200710185202.8 number, open day; A kind of solar cell backboard and preparation method thereof is disclosed; This backboard comprises base material and fluoropolymer layer, and each component of fluoropolymer layer is counted by weight: 25～45 parts of fluorine resins; 1.5～3 parts of modified resin; 0.5～3 part of polymer filler; 0.1～1 part of inorganic filler; 50～70 parts of solvents.The production cost of such scheme is low, function admirable, and its peel strength is high, and block-water performance is good, good weatherability.Again for example, the EP1938967 european patent application, open day is on July 2nd, 2008; International application no PCT/JP2006/312501; International publication number is WO2007/010706, and date of publication is on January 25th, 2007, discloses a kind of solar cell backboard with good waterproof plate; This solar cell back board module has coating material solidified film at least on a surface of splash guard, this coating material solidified film comprises the coating of the fluorochemical polymers with curable functional group.Such scheme passes through to make a kind of fluoro-containing coating, and fluoro-containing coating is coated on the base material, thereby improves the overall performance of backboard.Though the fluorine material can improve the overall performance of backboard, because fluorine material self character, it exists the surface ability high, surperficial hydrophobic, and adhesive property is poor.The adhesive property of this backboard and EVA has reduced, and makes the bonding processing technology of backboard and EVA become complicated.
Summary of the invention:
Technical problem to be solved by this invention is to overcome the deficiency of above-mentioned prior art, provides a kind of and has high-adhesion and have high-weatherability, chemical resistance, high electrical insulation properties, the solar cell notacoria of high water proofing property.
Another technical problem to be solved by this invention is to overcome the deficiency of above-mentioned prior art, provide a kind of can process have high-adhesion, the processing technology of solar cell notacoria that overall performance is good.
Solar cell notacoria according to a kind of high-adhesion provided by the invention; Comprise fluororesin polymer layer, basic unit, polyolefin tack coat; Has the macromolecule adhesive layer between said fluororesin polymer layer and the said basic unit; Have the macromolecule adhesive layer between said basic unit and the said polyolefin tack coat, the two sides of said fluororesin polymer layer has fluorosilicone and changes into rete.
Also have following attached technical characterictic according to a kind of solar cell notacoria provided by the invention with high-adhesion:
The two sides of said basic unit has nitrogen siliconization film forming layer.
The thickness that said fluorosilicone changes into rete is 0.01 micron-5 microns.
The thickness of said nitrogen siliconization film forming layer is 0.01 micron-5 microns.
Said basic unit is a PET basic unit; Or said basic unit is that PET and PBT or PEN heat are melted the high molecule alloy material basic unit that blend forms, and wherein the content of PBT or PEN is 1-50 part by weight; Or said basic unit adds to be selected from silica, titanium oxide, aluminium oxide or zirconic inorganic oxide and to form in PET, and wherein the content of inorganic oxide is 1-35 part by weight.
The thickness of said basic unit is 0.1 millimeter-10 millimeters.
Said fluororesin polymer layer is the PVDF polyvinylidene fluoride resin.
The content of fluororesin is 30-95 part by weight in the said fluororesin polymer layer, and the thickness of described fluororesin polymer layer is 0.01 millimeter-0.05 millimeter.
The thickness of described polyolefin tack coat is 0.01 millimeter-0.1 millimeter, and the thickness of described macromolecule adhesive layer is 0.005 millimeter-0.03 millimeter.
Said basic unit two sides is handled the said nitrogen siliconization of formation through plasma nitrogen siliconization and is changed into rete.
Said fluororesin polymer layer two sides forms said fluorosilicone through the processing of plasma fluorosilicone and changes into rete.
Processing technology according to the solar cell notacoria of a kind of high-adhesion provided by the invention mainly may further comprise the steps:
(1), carries out the processing of plasma fluorosilicone, activation substrate surface at the fluororesin polymer laminar surface;
(2), to spraying of the two sides of basic unit or roller coating macromolecule adhesive layer, through 20-150 degree centigrade of heating 1-600 second;
(3), the one side that basic unit scribbled the macromolecule adhesive layer with carry out gluing compoundly through fluororesin polymer layer after the processing of plasma fluorosilicone, another side and polyolefin tack coat carry out gluing compound.
Solar cell notacoria according to a kind of high-adhesion provided by the invention compared with prior art has following advantage: at first; The present invention is compound to the polyolefin tack coat on the notacoria; Both are made integral structure; Bond thereby be beneficial to, make that solar cell production is more simple and convenient with miscellaneous part.Secondly, the present invention forms fluorosilicone and changes into rete the processing of fluororesin polymer layer fluorosilicone; Basic unit is carried out the nitrogen siliconization handle, form nitrogen siliconization film forming layer, make that adhesive property of the present invention is better; Rete is closely knit, has improved barrier property, especially to the better obstruct of having of steam; Humidity resistance is good, and electric property and weather resistance are better; Once more, have suitable caking property, and the polyolefin tie layer surface of notacoria has and the excellent adhesion strength of other encapsulating materials (like EVA etc.) through the fluororesin polymer laminar surface of the notacoria after the above-mentioned processing and other encapsulating materials (like silica gel etc.).
Have following advantage according to a kind of processing technology with solar cell notacoria of high-adhesion provided by the invention: the cementability through the produced battery back film of processing technology of the present invention is better; Rete is closely knit; Improved barrier property; And this processing technology can realize serialization production, has improved production efficiency.
Description of drawings:
Fig. 1 is the structural representation of a kind of embodiment of the present invention.
Fig. 2 is the structural representation of another kind of embodiment of the present invention.
The specific embodiment:
Notacoria of the prior art is to cover the Tendlar of Du Pont film at two faces of PET basic unit usually, and the Tendlar film is to utilize the drawn processing again of casting technique film forming.This film is to belong to the film that non-heat fusing becomes, and between the particle of swelling air gap is arranged, and the mechanical strength of film is low, and it leans on solvent type adhesive and PET base adhesive, and this type of processing technology is complicated, and solvent is difficult for thoroughly volatilization.Be prone to form the weak spot of composite membrane.The moisture-vapor transmission that makes film is up to 4.2g/m
2D causes the photoelectric transformation efficiency of solar cell to decay very soon, has shortened the service life of solar cell.
Referring to Fig. 1; Solar cell notacoria according to a kind of high-adhesion provided by the invention; Comprise fluororesin polymer layer 1, basic unit 2, polyolefin tack coat 3; Have macromolecule adhesive layer 4 between said fluororesin polymer layer 1 and the said basic unit 2, have macromolecule adhesive layer 4 between said basic unit 2 and the said polyolefin tack coat 3, the two sides of said fluororesin polymer layer 1 has fluorosilicone and changes into rete 11.The present invention is combined with each other with basic unit 2 polyolefin tack coat 3 through macromolecule adhesive layer 4, be integrally formed the formula structure, and the later stage solar cell adds man-hour, can improve the adhesion strength of itself and EVA, makes it have higher caking property.Simultaneously; The present invention is provided with fluorosilicone at said fluororesin polymer layer 1 and said basic unit 2 and fluororesin polymer layer 3 outer surface and changes into rete 11; Make that not only the bonding between fluororesin polymer layer 1 and the basic unit 2 is more firm, and make that notacoria of the present invention is easy to bond with other solar module.Simultaneously, make that barrier of the present invention is better, whole humidity resistance, electric property and weather resistance are better.
Referring to Fig. 1, in the foregoing description that the present invention provides, the two sides of said basic unit 2 has nitrogen siliconization film forming layer 21.Said nitrogen siliconization film forming layer 21 can improve the bonding of basic unit 2 and macromolecule adhesive layer 4, thereby further improves the adhesion strength of basic unit 2 and fluororesin polymer layer 1 and basic unit 2 and polyolefin tack coat 3.
In the foregoing description that the present invention provides, the thickness that said fluorosilicone changes into rete 11 and nitrogen siliconization film forming layer 21 is 0.01 micron to 5 microns, and preferred thickness is 0.1 micron to 2 microns.Concrete numerical value can be according to 0.05 micron, 0.1 micron, 0.3 micron, 0.8 micron, 1.2 microns, 1.8 microns, 2 microns, 2.5 microns, 3 microns of thickness selections of basic unit and fluororesin polymer layer or the like.Here the selection of thickness will be satisfied the demand that bonds between each layer, will improve the overall performance of notacoria simultaneously.
Said basic unit 2 in the present invention can be PET basic unit, and wherein PET is a polyphenyl dioctyl phthalate glycol ester.
The high molecule alloy material basic unit that blend forms also can be melted for PET and PBT heat in said basic unit 2 of the present invention, and wherein PBT is a polybutylene terephthalate, through adding PBT PET is carried out modification, thereby improves the overall performance of said basic unit.Wherein the content of PBT is 1-50 part by weight, is preferably 8-20 part.Concrete numerical value can be 1 part, 4 parts, 8 parts, 12 parts, 15 parts, 18 parts, 20 parts, 25 parts, 30 parts, 40 parts and 50 parts.
The high molecule alloy material basic unit that blend forms can also be melted for PET and PEN heat in said basic unit 2 of the present invention, and wherein PEN is a PEN, through adding PEN PET is carried out modification, thereby improves the overall performance of said basic unit.Wherein the content of PEN is 1-50 part by weight, is preferably 8-20 part.Concrete numerical value can be 1 part, 4 parts, 8 parts, 12 parts, 15 parts, 18 parts, 20 parts, 25 parts, 30 parts, 40 parts and 50 parts.
Said basic unit 2 among the present invention adds inorganic oxide to form in PET, wherein the content of inorganic oxide is 1-35 part by weight, is preferably 10-20 part.Concrete numerical value can be 1 part, 5 parts, 10 parts, 12 parts, 16 parts, 20 parts, 25 parts, 30 parts and 35 parts.Wherein, said inorganic oxide can be silica, titanium oxide, aluminium oxide, zirconia.
In the above-mentioned basic unit 2 that the present invention provides, the thickness of said basic unit 2 is 0.1 millimeter-10 millimeters, and the wherein non-preferred thickness that foams basic unit is 0.2 millimeter-0.3 millimeter, and concrete numerical value is 0.2 millimeter, 0.22 millimeter, 0.25 millimeter, 0.28 millimeter, 0.3 millimeter.The thickness of foaming basic unit is the 1-3 millimeter, and concrete numerical value is 1 millimeter, 2 millimeters, 3 millimeters.
In the foregoing description that the present invention provides, said fluororesin polymer layer 1 is the PVDF resin, and this resin is the copolymer of vinylidene fluoride homopolymer or vinylidene and other a small amount of fluorine-containing vinyl monomers.
The content of fluororesin is 30-95 part by weight in the said fluororesin polymer layer 1 of the present invention, is preferably 50-80 part.Concrete numerical value is 30 parts, 40 parts, 50 parts, 60 parts, 70 parts, 80 parts, 95 parts.The thickness of described fluororesin polymer layer is 0.01 millimeter-0.05 millimeter.Specifically can elect 0.01 millimeter, 0.02 millimeter, 0.03 millimeter, 0.04 millimeter, 0.05 millimeter as.The fluororesin polymer layer of this size more can be satisfied the demand.
The thickness of the described macromolecule adhesive layer 4 among the present invention is 0.005 millimeter-0.03 millimeter, is preferably 0.01 millimeter-0.02 millimeter, specifically can elect 0.005 millimeter, 0.01 millimeter, 0.015 millimeter, 0.02 millimeter, 0.025 millimeter, 0.03 millimeter as.The thickness of described polyolefin tack coat 3 is 0.01 millimeter-0.1 millimeter.Be preferably 0.04 millimeter-0.06 millimeter, specifically can elect 0.01 millimeter, 0.02 millimeter, 0.04 millimeter, 0.05 millimeter, 0.06 millimeter, 0.08 millimeter, 0.10 millimeter as.The selection of above-mentioned size more can be satisfied the weatherability needs of notacoria, makes weatherability better.Said macromolecule adhesive layer 4 and polyolefin tack coat 3 all belong to the existing product of comparative maturity, directly adopt the commercially available prod to get final product.The present invention repeats no more to its concrete composition.
In the foregoing description that the present invention provides, it is one deck film forming layers that form through the processing of plasma fluorosilicone through the surface at said fluororesin polymer layer 1 that said fluorosilicone changes into film 11, and promptly alleged fluorosilicone changes into rete 11 among the present invention.Said nitrogen siliconization film forming layer 21 said basic units 2 two sides are handled through plasma nitrogen siliconization and are formed said nitrogen siliconization and change into rete 21.
To embodiment 1, a kind of processing technology with solar cell notacoria of high-adhesion provided by the invention mainly may further comprise the steps:
(1), carry out the processing of plasma fluorosilicone at fluororesin polymer laminar surface 1, the activation substrate surface, the base material at this place is meant the fluororesin polymer layer.Carry out plasma nitrogen siliconization on basic unit 2 surfaces and handle, activation basic unit 2 surfaces, the plasma treatment process that is adopted can be the plasma treatment process of comparative maturity in the prior art.At this, fluosilicic oxyalkane compound is coated in the surface of fluororesin polymer layer through the mode of spraying, roller coating or dipping, thereby makes the surface formation fluorosilicone of fluororesin polymer layer change into rete.The nitrogen silicone compounds is coated in the surface of basic unit 2 through the mode of spraying, roller coating or dipping, thereby makes the surface of basic unit 2 form nitrogen siliconization film forming layer.
(2), the two sides to basic unit after the activation 2 sprays or roller coating macromolecule adhesive layer 100 degrees centigrade of heated baking of warp 20 seconds;
(3), the one side that basic unit scribbled the macromolecule adhesive layer with carry out gluing compoundly through fluororesin polymer layer after the processing of plasma fluorosilicone, another side and polyolefin tack coat carry out gluing compound.
Through above-mentioned processing, the present invention will be used for the solar cell notacoria structure of processing integral type with the polyolefin tack coat and the basic unit of EVA bonding.Above-mentioned processing technology can realize serialization production, has improved production efficiency.This notacoria can be used as sale of finished goods, and is used for solar panel, and is bonding with other assemblies in the solar panel.
Fluosilicic oxyalkane compound that is adopted among the present invention and nitrogen silicone compounds can buy finished product from market.These compounds are organic compound, can be solid or liquid, carry out proportioning with other liquid.Its characteristic makes it have end parent organic matter, and the other end can close inorganic matter, thereby effectively raises the cohesive force between each layer.
The present invention is in step (2), and the heating-up temperature that is adopted can be at 20-150 degree centigrade, and the time of heated baking can be 1-600 second, and the preferable range heating-up temperature is 60-100 degree centigrade, and be 10-60 second heat time heating time.Wherein, numerical value is selected can be different according to the material of each layer, select different heating temperature and time for use.In addition, heating-up temperature is high more, and the heat time heating time of being adopted is short more.
Referring to Fig. 2, in other a kind of embodiment that the present invention provides, be that with embodiment 1 difference the two sides of basic unit 2 does not have nitrogen siliconization film forming layer 21 in the present embodiment, basic unit 2 is directly carrying out compound with macromolecule adhesive layer 3.In the corresponding processing technology, removed and the two sides of basic unit 2 has been carried out the processing of plasma nitrogen siliconization.Other structures are identical with embodiment 1.
The present invention adopts above-mentioned processing technology can realize the serialization production of notacoria processing, has improved production efficiency.
Product of the present invention is compared with external like product, and each association is following:
| Characteristic | Unit | Japanese product | U.S.'s product | The present invention |
| Surface tension | mN/cm | 30-40 | 40 | More than 45 |
| Caking ability to EVA | N/10mm | 20-40 | 20-40 | 50-100 |
| Moisture-vapor transmission | g/m 2.d | 1.6 | 4.3 | 0.1 below |
Can find out that through above contrast the present invention obviously is superior to external like product on each item index.
Claims (13)
1. the solar cell notacoria of a high-adhesion; It is characterized in that: comprise fluororesin polymer layer, basic unit, polyolefin tack coat; Has the macromolecule adhesive layer between said fluororesin polymer layer and the said basic unit; Have the macromolecule adhesive layer between said basic unit and the said polyolefin tack coat, the two sides of said fluororesin polymer layer has fluorosilicone and changes into rete.
2. the solar cell notacoria of a kind of high-adhesion as claimed in claim 1, it is characterized in that: the two sides of said basic unit has nitrogen siliconization film forming layer.
3. the solar cell notacoria of a kind of high-adhesion as claimed in claim 1, it is characterized in that: the thickness that said fluorosilicone changes into rete is 0.01 micron-5 microns.
4. the solar cell notacoria of a kind of high-adhesion as claimed in claim 2, it is characterized in that: the thickness of said nitrogen siliconization film forming layer is 0.01 micron-5 microns.
5. the solar cell notacoria of a kind of high-adhesion as claimed in claim 1, it is characterized in that: said basic unit is a PET basic unit; Or said basic unit is that PET and PBT or PEN heat are melted the high molecule alloy material basic unit that blend forms, and wherein the content of PBT or PEN is 1-50 part by weight; Or said basic unit adds to be selected from silica, titanium oxide, aluminium oxide or zirconic inorganic oxide and to form in PET, and wherein the content of inorganic oxide is 1-35 part by weight.
6. the solar cell notacoria of a kind of high-adhesion as claimed in claim 1, it is characterized in that: the thickness of said basic unit is 0.1 millimeter-10 millimeters.
7. the solar cell notacoria of a kind of high-adhesion as claimed in claim 1, it is characterized in that: said fluororesin polymer layer is the PVDF polyvinylidene fluoride resin.
8. the solar cell notacoria of a kind of high-adhesion as claimed in claim 1 is characterized in that: the content of fluororesin is 30-95 part by weight in the said fluororesin polymer layer, and the thickness of described fluororesin polymer layer is 0.01 millimeter-0.05 millimeter.
9. the solar cell notacoria of a kind of high-adhesion as claimed in claim 1, it is characterized in that: the thickness of described polyolefin tack coat is 0.01 millimeter-0.1 millimeter, the thickness of described macromolecule adhesive layer is 0.005 millimeter-0.03 millimeter.
10. the solar cell notacoria of a kind of high-adhesion as claimed in claim 2 is characterized in that: said basic unit two sides is handled through plasma nitrogen siliconization and is formed said nitrogen siliconization and change into rete.
11. the solar cell notacoria of a kind of high-adhesion as claimed in claim 1 is characterized in that: said fluororesin polymer layer two sides forms said fluorosilicone through the processing of plasma fluorosilicone and changes into rete.
12. the processing technology of the solar cell notacoria of a high-adhesion is characterized in that: mainly may further comprise the steps:
(1), carries out the processing of plasma fluorosilicone, activation substrate surface at the fluororesin polymer laminar surface;
(2), to spraying of the two sides of basic unit or roller coating macromolecule adhesive layer, through 20-150 degree centigrade of heating 1-600 second;
(3), the one side that basic unit scribbled the macromolecule adhesive layer with carry out gluing compoundly through fluororesin polymer layer after the processing of plasma fluorosilicone, another side and polyolefin tack coat carry out gluing compound.
13. the processing technology of the solar cell notacoria of a kind of high-adhesion as claimed in claim 12 is characterized in that: in step (1), carry out plasma nitrogen siliconization in substrate surface and handle the activation substrate surface; In step (2), two sides spraying or roller coating macromolecule adhesive layer to the basic unit after the activation heat 1-600 second through 20-150 degree centigrade.
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| CN104576796A (en) * | 2015-01-28 | 2015-04-29 | 明冠新材料股份有限公司 | Photovoltaic component back protecting film and manufacturing method thereof |
| CN105977324A (en) * | 2016-07-25 | 2016-09-28 | 无锡中洁能源技术有限公司 | Single-surface-fluorine-containing high-performance backboard |
| CN106252441A (en) * | 2016-08-31 | 2016-12-21 | 江苏裕康复合材料有限公司 | A kind of photovoltaic component back plate |
| CN106663707A (en) * | 2014-03-21 | 2017-05-10 | 杜邦公司 | Integrated back-sheets for back-contact solar cell modules |
| CN111718665A (en) * | 2017-08-11 | 2020-09-29 | 杭州福斯特应用材料股份有限公司 | Adhesive film for packaging photovoltaic module with multilayer structure and preparation method thereof |
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| CN111718665A (en) * | 2017-08-11 | 2020-09-29 | 杭州福斯特应用材料股份有限公司 | Adhesive film for packaging photovoltaic module with multilayer structure and preparation method thereof |
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| CN102529259B (en) | 2014-12-03 |
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