CN102529259B - 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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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 for solar cell, relate in particular to a kind of solar cell notacoria with high-adhesion, relate to a kind of technique of processing this notacoria simultaneously.
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 Function of solar cell notacoria is the overall mechanical strength that improves solar panel, can prevent that in addition water vapor permeable from, in sealant, affecting the service life of cell piece.In order to improve the overall performance of notacoria, in prior art, occur carrying out improved plan for notacoria in a large number.For example, Chinese Patent Application No. is No. CN200710185202.8, openly day is the application for a patent for invention that May 14, publication number were CN101177514 in 2008, a kind of solar cell backboard and preparation method thereof is disclosed, this backboard comprises base material and fluoropolymer layer, and the 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, 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 at least has coating material solidified film on a surface of splash guard, and this coating material solidified film comprises the coating of the fluorochemical polymers with curable functional group.Such scheme passes through to manufacture a kind of fluoro-containing coating, and fluoro-containing coating is coated on base material, thereby improves the overall performance of backboard.Although fluorine material can improve the overall performance of backboard, due to fluorine material self character, it exists surface energy high, surperficial hydrophobic, and adhesive property is poor.The adhesive property of this backboard and EVA has reduced, and makes the bond processing technique 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 there is high-adhesion, the processing technology of solar cell notacoria that overall performance is good.
According to the solar cell notacoria of a kind of high-adhesion provided by the invention, comprise fluororesin polymer layer, basic unit, polyolefin tack coat, between described fluororesin polymer layer and described basic unit, there is macromolecule adhesive layer, between described basic unit and described polyolefin tack coat, have macromolecule adhesive layer, the two sides of described fluororesin polymer layer has fluorosilicone and changes into rete.
Also there is following attached technical characterictic according to a kind of solar cell notacoria with high-adhesion provided by the invention:
The two sides of described basic unit has nitrogen siliconization film forming layer.
The thickness that described fluorosilicone changes into rete is 0.01 micron-5 microns.
The thickness of described nitrogen siliconization film forming layer is 0.01 micron-5 microns.
Described basic unit is PET basic unit; Or described basic unit is that PET and PBT or PEN heat are melted the high molecule alloy material basic unit that blend forms, wherein the content of PBT or PEN is 1-50 part by weight; Or described basic unit adds to be selected from silica, titanium oxide, aluminium oxide or zirconic inorganic oxide forms in PET, wherein the content of inorganic oxide is 1-35 part by weight.
The thickness of described basic unit is 0.1 millimeter-10 millimeters.
Described fluororesin polymer layer is PVDF polyvinylidene fluoride resin.
In described fluororesin polymer layer, the content of fluororesin is 30-95 part by weight, 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.
Described basic unit two sides is processed and is formed described nitrogen siliconization film forming layer through plasma nitrogen siliconization.
Described fluororesin polymer layer two sides processed the described fluorosilicone of formation through plasma fluorosiliconeization and changed into rete.
According to the processing technology of the solar cell notacoria of a kind of high-adhesion provided by the invention, mainly comprise the following steps:
(1), carry out the processing of plasma fluorosilicone on fluororesin polymer layer surface, activation substrate surface;
(2) two sides spraying or roller coating macromolecule adhesive layer, to basic unit, heat 1-600 second through 20-150 degree Celsius;
(3), basic unit scribbled to the one side of macromolecule adhesive layer carry out gluing compoundly with fluororesin polymer layer after plasma fluorosiliconeization is processed, another side and polyolefin tack coat carry out gluing compound.
According to the solar cell notacoria of a kind of high-adhesion provided by the invention compared with prior art tool have the following advantages: first, the present invention is compound to polyolefin tack coat on notacoria, both are made to integral structure, bond thereby be beneficial to miscellaneous part, solar cell is produced more simple and convenient.Secondly, the present invention is to the processing of fluororesin polymer layer fluorosilicone, form fluorosilicone and change into rete, basic unit is carried out to the processing of nitrogen siliconization, form nitrogen siliconization film forming layer, make adhesive property of the present invention 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; Again, there is suitable caking property through the fluororesin polymer layer surface of above-mentioned notacoria after treatment and other encapsulating materials (as silica gel etc.), and the polyolefin tie layer surface of notacoria have the adhesion strength excellent with other encapsulating materials (as EVA etc.).
Processing technology tool according to a kind of solar cell notacoria with high-adhesion provided by the invention has the following advantages: the cementability by the produced battery back film of processing technology of the present invention is better, rete is closely knit, improve barrier property, and this processing technology can realize serialization and produce, and has improved production efficiency.
Brief description of the 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.
Detailed description of the invention:
Notacoria of the prior art is conventionally at two Tendlar of Mian Shifu Du Pont films of PET basic unit, and Tendlar film is to utilize the drawn processing again of casting technique film forming.This film is to belong to the non-thermal film being melt into, and between swelling particle, has air gap, and the mechanical strength of film is low, and it leans on solvent type adhesive and PET base adhesive, this type of processing technology complexity, and solvent is difficult for thoroughly volatilization.Easily form the weak spot of composite membrane.Make the moisture-vapor transmission of film 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, according to the solar cell notacoria of a kind of high-adhesion provided by the invention, comprise fluororesin polymer layer 1, basic unit 2, polyolefin tack coat 3, between described fluororesin polymer layer 1 and described basic unit 2, there is macromolecule adhesive layer 4, between described basic unit 2 and described polyolefin tack coat 3, have macromolecule adhesive layer 4, the two sides of described 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 by macromolecule adhesive layer 4, form integral structure, and 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 described fluororesin polymer layer 1 and described basic unit 2 and fluororesin polymer layer 3 outer surface and changes into rete 11, not only make the bonding between fluororesin polymer layer 1 and basic unit 2 more firm, and make notacoria of the present invention be easy to bond with other solar module.Meanwhile, make barrier of the present invention better, humidity resistance, electric property and the weather resistance of entirety are better.
Referring to Fig. 1, in the above-described embodiment providing in the present invention, the two sides of described basic unit 2 has nitrogen siliconization film forming layer 21.Described 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 above-described embodiment providing in the present invention, the thickness that described 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 etc.Here the selection of thickness, meet the demand boning between each layer, will improve the overall performance of notacoria simultaneously.
Described basic unit 2 in the present invention can be PET basic unit, and wherein PET is 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 described basic unit 2 of the present invention, and wherein PBT is polybutylene terephthalate, by adding PBT, PET is carried out to modification, thereby improves the overall performance of described 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 described basic unit 2 of the present invention, and wherein PEN is PEN, by adding PEN, PET is carried out to modification, thereby improves the overall performance of described 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.
Basic unit 2 of the present invention is after PET and PBT or PEN alloying, crystallinity, processability and planarization are improved, substrate surface plasma homogeneity is improved, and active group is uniformly dispersed, and is follow-up silicon titanizing and the firm laminating Reliable guarantee that had of fluorosilicone Large-Area-Uniform.
Described basic unit 2 in the present invention adds inorganic oxide to form in PET, and 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, described inorganic oxide can be silica, titanium oxide, aluminium oxide, zirconia.
Basic unit 2 in the present invention also can adopt PE, forms the foaming layer of ultra-fine closed pore formula by ultra-fine closed pore formula foam process, and the foam hole in the foaming layer is here enclosed construction, and foam hole is hyperfine structure.The basic unit of this structure has good holding power, and lightweight, is easy to bending, can be applied in bending-type solar panel.
In the above-mentioned basic unit 2 providing in the present invention, the thickness of described basic unit 2 is 0.1 millimeter-10 millimeters, and wherein the 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 1-3 millimeter, and concrete numerical value is 1 millimeter, 2 millimeters, 3 millimeters.
In the above-described embodiment providing in the present invention, described fluororesin polymer layer 1 is PVDF resin, and this resin is the copolymer of vinylidene fluoride homopolymer or vinylidene and other a small amount of fluorine-containing vinyl monomers.
In described fluororesin polymer layer 1 of the present invention, the content of fluororesin is 30-95 part by weight, 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 in 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 meet the weatherability needs of notacoria, makes weatherability better.Described macromolecule adhesive layer 4 and polyolefin tack coat 3 all belong to the existing product of comparative maturity, directly adopt commercially available prod.The present invention repeats no more its concrete composition.
In above-described embodiment that the present invention provides, it is to process one deck film forming layer forming through plasma fluorosiliconeization by the surface at described fluororesin polymer layer 1 that described fluorosilicone changes into film 11, and in the present invention, alleged fluorosilicone changes into rete 11.Described in described nitrogen siliconization film forming layer 21, basic unit 2 two sides are processed and are formed described nitrogen siliconization film forming layer 21 through plasma nitrogen siliconization.
For embodiment 1, the processing technology of a kind of solar cell notacoria with high-adhesion provided by the invention, mainly comprises the following steps:
(1), carry out the processing of plasma fluorosilicone on fluororesin polymer layer surface 1, activation substrate surface, the base material at this place refers to fluororesin polymer layer.Carry out the processing of plasma nitrogen siliconization on basic unit 2 surfaces, activation basic unit 2 surfaces, the plasma treatment process adopting can be the plasma treatment process of comparative maturity in prior art.At this, fluosilicic oxyalkane compound is coated in to the surface of fluororesin polymer layer by the mode of spraying, roller coating or dipping, thereby makes the surface formation fluorosilicone of fluororesin polymer layer change into rete.Nitrogen silicone compounds is coated in to the surface of basic unit 2 by the mode of spraying, roller coating or dipping, thereby makes the surface of basic unit 2 form nitrogen siliconization film forming layer.
(2), to activating two sides spraying or the roller coating macromolecule adhesive layer of rear basic unit 2, through 100 degrees Celsius of heated bakings 20 seconds;
(3), basic unit scribbled to the one side of macromolecule adhesive layer carry out gluing compoundly with fluororesin polymer layer after plasma fluorosiliconeization is processed, another side and polyolefin tack coat carry out gluing compound.
Through above-mentioned processing, the present invention is by for making the solar cell notacoria structure of integral type with the polyolefin tack coat of EVA bonding and basic unit.Above-mentioned processing technology can realize serialization and produce, and has improved production efficiency.This notacoria can be used as sale of finished goods, and for solar panel, bonding with other assemblies in solar panel.
The fluosilicic oxyalkane compound adopting in the present invention and nitrogen silicone compounds can buy finished product from the market.These compounds are organic compound, can be solid or liquid, carry out proportioning with other liquid.Its characteristic makes it have one 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 adopting can be at 20-150 degree Celsius, and the time of heated baking can be 1-600 second, and preferable range heating-up temperature is 60-100 degree Celsius, and the heat time is 10-60 second.Wherein, numerical value is selected according to the material difference of each layer, to select different acid extractions.In addition, heating-up temperature is higher, and the heat time adopting is shorter.
Referring to Fig. 2, in another embodiment providing in the present invention, difference from Example 1 is, in the present embodiment, the two sides of basic unit 2 does not have nitrogen siliconization film forming layer 21, and basic unit 2 is directly carrying out compound with macromolecule adhesive layer 3.In corresponding processing technology, remove and the two sides of basic unit 2 has been carried out to the processing of plasma nitrogen siliconization.Other structures are identical with embodiment 1.
The serialization that the present invention adopts above-mentioned processing technology can realize notacoria processing is produced, and has improved production efficiency.
Product of the present invention is compared with external like product, and every data are as follows:
| Characteristic | Unit | Japanese product | U.S.'s product | The present invention |
| Surface tension | mN/cm | 30-40 | 40 | More than 45 |
| To the caking ability of EVA | N/10mm | 20-40 | 20-40 | 50-100 |
| Moisture-vapor transmission | g/m 2.d | 1.6 | 4.3 | Below 0.1 |
Can find out by above contrast, the present invention, on indices, is obviously better than same kind of products at abroad.
Claims (11)
1. the solar cell notacoria of a high-adhesion, it is characterized in that: comprise fluororesin polymer layer, basic unit, polyolefin tack coat, between described fluororesin polymer layer and described basic unit, there is macromolecule adhesive layer, between described basic unit and described polyolefin tack coat, there is macromolecule adhesive layer, described polyolefin tack coat and described link base layer are crossed described macromolecule adhesive layer and are combined with each other, form integral structure, the two sides of described fluororesin polymer layer has fluorosilicone and changes into rete, and the two sides of described basic unit has nitrogen siliconization film forming layer.
2. the solar cell notacoria of a kind of high-adhesion as claimed in claim 1, is characterized in that: the thickness that described fluorosilicone changes into rete is 0.01 micron-5 microns.
3. the solar cell notacoria of a kind of high-adhesion as claimed in claim 1, is characterized in that: the thickness of described nitrogen siliconization film forming layer is 0.01 micron-5 microns.
4. the solar cell notacoria of a kind of high-adhesion as claimed in claim 1, is characterized in that: described basic unit is PET basic unit; Or described basic unit is that PET and PBT or PEN heat are melted the high molecule alloy material basic unit that blend forms, wherein the content of PBT or PEN is 1-50 part by weight; Or described basic unit adds to be selected from silica, titanium oxide, aluminium oxide or zirconic inorganic oxide forms in PET, wherein the content of inorganic oxide is 1-35 part by weight.
5. the solar cell notacoria of a kind of high-adhesion as claimed in claim 1, is characterized in that: the thickness of described basic unit is 0.1 millimeter-10 millimeters.
6. the solar cell notacoria of a kind of high-adhesion as claimed in claim 1, is characterized in that: described fluororesin polymer layer is PVDF polyvinylidene fluoride resin.
7. the solar cell notacoria of a kind of high-adhesion as claimed in claim 1, is characterized in that: in described fluororesin polymer layer, the content of fluororesin is 30-95 part by weight, and the thickness of described fluororesin polymer layer is 0.02 millimeter-0.03 millimeter.
8. the solar cell notacoria of a kind of high-adhesion as claimed in claim 1, is characterized in that: 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.
9. the solar cell notacoria of a kind of high-adhesion as claimed in claim 1, is characterized in that: described basic unit two sides is processed and formed described nitrogen siliconization film forming layer through plasma nitrogen siliconization.
10. the solar cell notacoria of a kind of high-adhesion as claimed in claim 1, is characterized in that: described fluororesin polymer layer two sides processed the described fluorosilicone of formation through plasma fluorosiliconeization and changed into rete.
The processing technology of the solar cell notacoria of a kind of high-adhesion described in 11. claim 1-10 any one, is characterized in that: mainly comprise the following steps:
(1), carry out the processing of plasma fluorosilicone on fluororesin polymer layer surface, activation substrate surface;
(2) two sides spraying or roller coating macromolecule adhesive layer, to basic unit, heat 1-600 second through 20-150 degree Celsius;
(3), basic unit scribbled to the one side of macromolecule adhesive layer carry out gluing compoundly with fluororesin polymer layer after plasma fluorosiliconeization is processed, another side and polyolefin tack coat carry out gluing compound;
Wherein, in step (1), carry out the processing of plasma nitrogen siliconization in substrate surface, activation substrate surface; In step (2), to two sides spraying or the roller coating macromolecule adhesive layer of the basic unit after activation, heat 1-600 second through 20-150 degree Celsius.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20170133537A1 (en) * | 2014-03-21 | 2017-05-11 | E I Du Pont De Nemours And Company | Integrated back-sheets for back-contact solar cell modules |
| CN104576796B (en) * | 2015-01-28 | 2015-12-30 | 明冠新材料股份有限公司 | Photovoltaic module back protection film and preparation 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 |
| CN111718665B (en) * | 2017-08-11 | 2022-11-22 | 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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| CN101472741A (en) * | 2006-04-21 | 2009-07-01 | 阿肯马法国公司 | Multilayer structure having a grafted polyvinylidene fluoride blend layer |
| CN101661962A (en) * | 2008-08-29 | 2010-03-03 | 苏州中来太阳能材料技术有限公司 | Solar battery back film with high cohesiveness and processing process |
| CN101811384A (en) * | 2009-02-24 | 2010-08-25 | 苏州中来太阳能材料技术有限公司 | Medium surface energy teflon backing plate and processing technique thereof |
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| JP2010232442A (en) * | 2009-03-27 | 2010-10-14 | Lintec Corp | Method of manufacturing backside protective sheet for solar cell module |
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| CN101472741A (en) * | 2006-04-21 | 2009-07-01 | 阿肯马法国公司 | Multilayer structure having a grafted polyvinylidene fluoride blend layer |
| CN101661962A (en) * | 2008-08-29 | 2010-03-03 | 苏州中来太阳能材料技术有限公司 | Solar battery back film with high cohesiveness and processing process |
| CN101811384A (en) * | 2009-02-24 | 2010-08-25 | 苏州中来太阳能材料技术有限公司 | Medium surface energy teflon backing plate and processing technique thereof |
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