CN103045127B - PVB composition for photovoltaic module packaging and PVB packaging film thereof - Google Patents
PVB composition for photovoltaic module packaging and PVB packaging film thereof Download PDFInfo
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- CN103045127B CN103045127B CN201210486073.7A CN201210486073A CN103045127B CN 103045127 B CN103045127 B CN 103045127B CN 201210486073 A CN201210486073 A CN 201210486073A CN 103045127 B CN103045127 B CN 103045127B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
A PVB composition for photovoltaic module packaging and a PVB packaging film thereof belong to the technical field of photovoltaic module packaging materials. The feed additive is characterized by comprising the following substances in percentage by weight: 60-80% of PVB resin and 0.1-20% of low-polarity water-blocking substances. The PVB composition for photovoltaic module packaging and the PVB packaging film have high insulation resistance and good weather resistance, can obviously improve the electrical performance of the packaging film, have no obvious reduction in insulation performance under the environment of long-time low temperature and high humidity and high temperature and high humidity, have good packaging effect, and can ensure long-time efficient operation of a photovoltaic module.
Description
Technical field
The invention belongs to photovoltaic component encapsulating field of material technology, be specially a kind of PVB composition for photovoltaic component encapsulating and PVB encapsulating film thereof.
Background technology
PVB is polyvinyl butyral acetal, and applying at China is not at present also wide especially in fact, wherein mainly through a kind of macromolecular material---the PVB intermediate coat of softening agent plasticizing extrusion molding.Under the background that global energy cost day by day raises, photovoltaic industry is risen just gradually, and the glue of common photovoltaic component encapsulating is generally EVA.Because the ageing resistance of EVA is strong, work-ing life do not reach 50 years, can not turn to be yellow will affect the generated energy of the attractive in appearance of assembly and system with assembly with life-span and EVA.And PVB exactly can meet this respect requirement, the key distinction between EVA and PVB film is EVA film is a kind of elastomerics carrying out chemically crosslinked, and PVB film is then noncrosslinking thermoplastics.When glass/glass photovoltaic module makes the laminated glass containing cell piece, they just produce different performances again in safety and security personnel.If make interlayer by EVA film, namely using special thick glass coating to be pressed into glass assembly, being also difficult to reach the safety standards same with being used alone PVB/ glass.This means that PVB has higher penetration-resistant and better rear fracture property.And these when requiring glass curtain wall just or the integration of roof key element laminated safety glass must meet.And the two glass photovoltaic curtain walls adopting PVB to make not only have the energy-conserving actions such as heat insulation and noise reduction, meanwhile, compared with simple glass curtain wall, can also reduce light pollution.Therefore consider from permanent interests, the advantage of PVB is obvious.For a long time, PVB, because its good mechanical property, obtains as safety glass interlayers and uses widely.As solar cell package material, PVB mechanical property can meet the requirement of photovoltaic module for safety completely.But except mechanical property is as packaged material, also good electrical property must be had, there is good insulativity, and its insulation weather resistance should be better.Containing a large amount of hydroxyls in PVB structure, it is the hydrophilic radical of strong polarity.The hydroxyl of strong polarity exists and makes the volume specific resistance of PVB will lower than EVA.And its affinity for water is the generally acknowledged unfavourable condition as packaged material.But its hydroxyl is again it has the major cause of adhesiveproperties.Because PVB is for the affinity of water, under long-term hot and humid condition, its moisture absorbed causes its insulativity sharply to decline, thus causes the electrical performance testing of photovoltaic module defective, and occur that wet leakage current is excessive, power attenuation is excessive.CN102292827 describe a kind of comprise sequestrant prevent or reduce PVB contact and the PVB packaged material of oxidation stain with the metal chunk of solar energy module.CN101728443A discloses a kind of PVB or EVA packaged material of photocuring.But as the electrical insulation performance of photovoltaic encapsulation material property outbalance and hot and humid for a long time, or the maintenance of the insulating property of packaged material does not then have invention to set forth under the condition of low temperature and high relative humidity, and this affects the salient features of PVB as packaged material just.
Summary of the invention
For the above-mentioned problems in the prior art, the object of the invention is to design provide a kind of have improve electric property for the PVB composition of photovoltaic component encapsulating and the technical scheme of PVB encapsulating film thereof, this encapsulating film has higher insulation resistance and good weathering resistance, at long-time low temperature and high relative humidity, under hot and humid environment, its insulating property obviously do not decline, and packaging effect is excellent, the long-time high efficiency operation of photovoltaic module can be ensured.
Described a kind of PVB composition for photovoltaic component encapsulating, it is characterized in that the following material containing weight percentage: 60-80%PVB resin, the low polarity of 0.1-20% blocks water class material, described low polarity block water class material be containing or not containing the silicane of functional group or the silane of type siloxane or modification, silicone compounds, contain or do not contain the aliphatics with 6-40 carbon atom or the aromatic alkyl compound of functional group, contain or do not contain the long-chain fat race with 6-60 carbon atom or the aromatic series lipid of functional group, lipid acid or aliphatic alcohols compound, contain or do not comprise polysiloxane containing the low polar polymer of functional group, polyolefine, one or more mixtures in polyester.
Described a kind of PVB composition for photovoltaic component encapsulating, is characterized in that the described low polarity class material that blocks water is the polysiloxane containing epoxy-functional, the polysiloxane containing double bond functional group, long-chain fat race alkane, the 18 alkyl fatty acid monoesters containing double bond, the long-chain fat race alkane containing double bond or silane coupling agent containing epoxy-functional.
Described a kind of PVB composition for photovoltaic component encapsulating, is characterized in that the content of PVB resin is 60%-80%, preferred 70%-75%.
Described a kind of PVB composition for photovoltaic component encapsulating, is characterized in that the block water content of class material of low polarity is 0.1%-20%, preferred 5-10%.
Described a kind of PVB composition for photovoltaic component encapsulating, it is characterized in that also containing weight percentage 25-35% softening agent, described softening agent is any known softening agent, is preferably triglycol two 2-ethylhexoate 3GO, Tetraglycol 99 two positive heptanoate 4G7, Uniflex DBS DBS.
Described a kind of PVB composition for photovoltaic component encapsulating, it is characterized in that the thermo-stabilizer also containing weight percentage 0.01-1%, described thermo-stabilizer is any commercially available known thermo-stabilizer.
Described a kind of PVB composition for photovoltaic component encapsulating, is characterized in that described photostabilizer is any commercially available known photostabilizer also containing weight percentage 0.01-1% photostabilizer.
Described a kind of PVB composition for photovoltaic component encapsulating, is characterized in that described white pigment is titanium white class pigment, Zinc-oxide-based pigment or lithopone class pigment also containing weight percentage 0.1-50% white pigment.
Described a kind of PVB encapsulating film made for the PVB composition of photovoltaic component encapsulating, it is characterized in that: according to above-mentioned substance ratio, after each component being mixed, together blanking adds film extrusion in screw extrusion press.
Be not dispersed in PVB composition containing the above-mentioned low polarity of the functional group material that blocks water with physical blending form in the present invention, but in order to prevent low polar material and being separated of PVB composition and the precipitation caused, also can add some graft reaction initiators, in the blended course of processing, make low polar hydrophobic material and PVB resin generation graft reaction and prevent the precipitation caused that is separated.
Another kind of mode of the present invention introduces to block water class material containing the low polarity of functional group, described functional group can be carboxyl, ester group etc. all can with the group of hydroxyl reaction, and undersaturated functional group, unsaturated functional group is combined with PVB resin by free radical grafting mode.The dry weight that in the present invention, " dry weight " is PVB resin, removes the weight after water exactly from PVB resin.
PVB resin of the present invention has the residual hydroxy groups of about 17% to about 23% weight, preferred hydroxy radical content is about 18% to being about 21%, described hydroxyl value can affect softening agent and low polarity and to block water the consistency of class material, with other character of PVB resin, usually but not definitely so, hydroxy radical content is lower, and the consistency of the softening agent in the invention process and low polar material is better.
PVB composition of the present invention also can comprise surface tension controlling agents.
According to actual needs, to be also prepared into tool coloured for encapsulating film.In the application of some two glass photovoltaic module, white light reflecting material can be added in packaged material or on backboard to improve to the specific absorption of sunlight.Solution is in this invention, adds the pigment that white has high gloss, high-reflectivity in PVB composition.This pigment comprises known various commercially available white pigment.Preferred white pigment is titanium dioxide class pigment, lithopone class pigment, Zinc-oxide-based pigment.Be more preferably titanium dioxide class pigment.
PVB encapsulating film of the present invention by well known in the art various extrude or coextrusion method obtain.As blocked water additive and other optional additive coextrusion and obtain the PVB composition photovoltaic encapsulation film having and improve electric property by PVB resin, softening agent, low polarity at the temperature of 150 DEG C-230 DEG C.
Above-mentioned a kind of PVB composition for photovoltaic component encapsulating and PVB encapsulating film thereof, there is higher insulation resistance and good weathering resistance, the electric property of encapsulating film can be significantly improved, at long-time low temperature and high relative humidity, under hot and humid environment, its insulating property obviously do not decline, and packaging effect is excellent, the long-time high efficiency operation of photovoltaic module can be ensured.
The percentage composition related in present specification unless otherwise indicated, other the weight percentage being pure substance.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment 1: containing PVB resin 75g, 3GO softening agent 25g in every 100gPVB composition, the polysiloxane 5g containing epoxy-functional, thermo-stabilizer IRGANOX1010 1g, photostabilizer TINUVIN 326 0.1g; After being mixed by above-mentioned materials according to above weight ratio, together blanking is added with film extrusion in 83mm twin screw extruder, obtains PVB encapsulating film.
Embodiment 2: containing PVB resin 65g, 3GO softening agent 35g in every 100gPVB composition, the polysiloxane 0.2g containing epoxy-functional, thermo-stabilizer IRGANOX1010 0.1g, photostabilizer TINUVIN 326 1g; Preparation technology is with embodiment 1.
Embodiment 3: containing PVB resin 80g, 3GO softening agent 20g in every 100gPVB composition, the polysiloxane 20g containing epoxy-functional, thermo-stabilizer IRGANOX1010 0.2g, photostabilizer TINUVIN 326 0.5g; Preparation technology is with embodiment 1.
Embodiment 4: containing PVB resin 72g, 4G7 softening agent 28g in every 100gPVB composition, the polysiloxane 2g containing double bond functional group, thermo-stabilizer IRGANOX1010 0.7g, photostabilizer TINUVIN 326 0.3g; Preparation technology is with embodiment 1.
Embodiment 5: containing PVB resin 77g, 4G7 softening agent 23g in every 100gPVB composition, the polysiloxane 2g containing double bond functional group, thermo-stabilizer IRGANOX1076 0.4g, photostabilizer TINUVIN 770 0.3g; Preparation technology is with embodiment 1.
Embodiment 6: containing PVB resin 73g, 3GO softening agent 27g, the long-chain fat race alkane 10g containing epoxy-functional, thermo-stabilizer IRGANOX1076 0.4g, photostabilizer TINUVIN 770 1g in every 100gPVB composition; Preparation technology is with embodiment 1.
Embodiment 7: containing PVB numerical value 75g, 3GO softening agent 25g in every 100gPVB composition, the 18 alkyl fatty acid monoester 5g containing double bond, thermo-stabilizer IRGANOX1076 0.4g, photostabilizer TINUVIN 770 0.5g; Preparation technology is with embodiment 1
Embodiment 8: containing PVB resin 73g, 3GO softening agent 27g, the long-chain fat race alkane 4g containing double bond, titanium dioxide 50g, thermo-stabilizer IRGANOX1076 0.1g in every 100gPVB composition, light stablizes TINUVIN 770 1g; Preparation technology is with embodiment 1.
Embodiment 9: containing PVB resin 73g, 3GO softening agent 27g, silane coupling agent Z-6030 1g, titanium dioxide 10g, thermo-stabilizer IRGANOX1076 0.4g in every 100gPVB composition, light stablizes TINUVIN 770 0.5g; Preparation technology is with embodiment 1.
Above-mentioned materials all directly can be buied by market.
For further illustrating beneficial effect of the present invention, prove its technique effect further below by corresponding test.
The PVB encapsulating film that above-described embodiment 1-9 is obtained, surveys its volume specific resistance and for being made into tstr encapsulation performance after photovoltaic module.
The mensuration of volume specific resistance: measure according to standard GB/T/T1410-2006 " solid insulating material volume specific resistance and surface resistivity experimental technique ".PVB packaged material is for the mensuration of photovoltaic component encapsulating effect: after being prepared into assembly by assembly manufacturer, measures according to IEC61648-2008 or standard GB/T/T9535-1998 " ground Crystalline Silicon PV Module-design qualification and sizing ".
Test-results is as shown in the table:
| Volume specific resistance (Ω cm) | 1000h humid heat test front assembly resistance (M Ω) | Assembly resistance (M Ω) after 1000h humid heat test | |
| Example 1 | 3.2 x10 13 | 55 | 44 |
| Example 2 | 2.3 x10 13 | 50 | 43 |
| Example 3 | 4.6 x10 13 | 51 | 42 |
| Example 4 | 2.8 x10 13 | 50 | 42 |
| Example 5 | 3.8 x10 13 | 49 | 43 |
| Example 6 | 5.1x10 13 | 58 | 46 |
| Example 7 | 3.6x10 13 | 50 | 44 |
| Example 8 | 1.5 x10 14 | 70 | 55 |
| Example 9 | 1.1 x10 14 | 64 | 50 |
Test-results shows: the PVB photovoltaic component encapsulating material that example 1-9 makes, and can meet the requirement for component package performance after the 1000h humid heat test required by IEC standard and national standard.The nonpolar class material that blocks water add the volume specific resistance that can improve material, thus improve the performance of pvb film as photovoltaic component encapsulating material.And along with the increase of the class substances content that blocks water, playing a volume specific resistance also increases to some extent.The tired material that blocks water added in the present invention, greatly can improve the encapsulation performance of PVB photovoltaic encapsulation film, can be widely used in the package application of solar-energy photo-voltaic cell.
Claims (5)
1. the PVB composition for photovoltaic component encapsulating, it is characterized in that the following material containing weight percentage: 60-80%PVB resin, the low polarity of 0.1-20% blocks water class material, 25-35% softening agent, the thermo-stabilizer of 0.01-1%, 0.01-1% photostabilizer, each composition weight percentage composition sum equals absolutely, the described low polarity class material that blocks water is polysiloxane containing epoxy-functional, polysiloxane containing double bond functional group, long-chain fat race alkane containing epoxy-functional, the 18 alkyl fatty acid monoesters containing double bond, long-chain fat race alkane containing double bond.
2. a kind of PVB composition for photovoltaic component encapsulating as claimed in claim 1, is characterized in that the content of PVB resin is 70%-75%.
3. a kind of PVB composition for photovoltaic component encapsulating as claimed in claim 1, is characterized in that the block water content of class material of low polarity is 5-10%.
4. a kind of PVB composition for photovoltaic component encapsulating as claimed in claim 1, is characterized in that described white pigment is titanium white class pigment, Zinc-oxide-based pigment or lithopone class pigment also containing weight percentage 0.1-50% white pigment.
5. adopt a kind of PVB encapsulating film made for the PVB composition of photovoltaic component encapsulating according to claim 1, it is characterized in that: according to described material proportion, after each component being mixed, together blanking adds film extrusion in screw extrusion press.
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| CN201210486073.7A CN103045127B (en) | 2012-11-26 | 2012-11-26 | PVB composition for photovoltaic module packaging and PVB packaging film thereof |
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| CN201210486073.7A CN103045127B (en) | 2012-11-26 | 2012-11-26 | PVB composition for photovoltaic module packaging and PVB packaging film thereof |
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| CN103045127B true CN103045127B (en) | 2015-09-02 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107681015B (en) * | 2017-11-07 | 2024-04-16 | 苏州中来光伏新材股份有限公司 | Preparation method of PVB film and double-glass component encapsulated with the PVB film |
| CN108977129B (en) * | 2018-08-10 | 2021-02-05 | 杭州亿阳光伏科技有限公司 | Weather-proof solar cell packaging adhesive film |
| CN110591605A (en) * | 2019-09-16 | 2019-12-20 | 升信新材（北京）科技有限公司 | Encapsulation film for MWT solar cell and preparation method thereof |
| CN110885641B (en) * | 2019-12-16 | 2021-11-16 | 陕西工业职业技术学院 | High-performance PVB (polyvinyl butyral) adhesive film for packaging solar cell and preparation method thereof |
| CN114316489A (en) * | 2021-12-31 | 2022-04-12 | 浙江德斯泰新材料股份有限公司 | Low-water-absorption PVB intermediate film and preparation process thereof |
| CN116080032B (en) * | 2023-02-21 | 2023-09-08 | 江苏奥天利新材料有限公司 | PVB intermediate film manufacturing method with regular surface lines |
| CN116535996B (en) * | 2023-05-08 | 2024-06-28 | 浙江祥邦科技股份有限公司 | A water vapor barrier anti-aging white EVA packaging film and its preparation process |
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| CN1823096A (en) * | 2003-08-21 | 2006-08-23 | 瓦克化学有限公司 | Silicone-containing polyvinyl acetals |
| CN101942170A (en) * | 2010-09-25 | 2011-01-12 | 杭州福斯特光伏材料股份有限公司 | Polymer packaging material and application thereof |
| CN102575080A (en) * | 2009-08-07 | 2012-07-11 | 可乐丽股份有限公司 | Polyvinyl acetal composition, laminate, and use thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102007000816A1 (en) * | 2007-10-05 | 2009-04-09 | Kuraray Europe Gmbh | Photovoltaic modules with plasticized films based on polyvinyl acetal with high specific resistance |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1823096A (en) * | 2003-08-21 | 2006-08-23 | 瓦克化学有限公司 | Silicone-containing polyvinyl acetals |
| CN102575080A (en) * | 2009-08-07 | 2012-07-11 | 可乐丽股份有限公司 | Polyvinyl acetal composition, laminate, and use thereof |
| CN101942170A (en) * | 2010-09-25 | 2011-01-12 | 杭州福斯特光伏材料股份有限公司 | Polymer packaging material and application thereof |
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