CN102514343A - Solar cell backboard and production technique thereof - Google Patents
Solar cell backboard and production technique thereof Download PDFInfo
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- CN102514343A CN102514343A CN201110385024XA CN201110385024A CN102514343A CN 102514343 A CN102514343 A CN 102514343A CN 201110385024X A CN201110385024X A CN 201110385024XA CN 201110385024 A CN201110385024 A CN 201110385024A CN 102514343 A CN102514343 A CN 102514343A
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- pet film
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Abstract
The invention discloses a solar cell backboard and a production technique thereof, the technique comprises the following steps of: (1) performing corona treatment on a PET film; (2) preparing an adhesive by KS06 glue of Coffey Chemical Co. Ltd; (3) coating the adhesive on one surface of the PET film; (4) drying the adhesive; (5) pressing the adhesive coating surface of the PET film with a PVDF film at a hot pressing state; (6) repeating the steps (3)-(5), coating the adhesive on the other surface of the PET film, drying the adhesive, and pressing the PET film with the PVDF film; and (7) curing the pressed solar cell backboard. The solar cell backboard produced by the invention has the advantages of transparency and beauty, excellent electric insulation resistance, hydrolysis aging resistance, dimension stability, water vapor blocking performance, stretching performance and uvioresistant property; besides, the layers in the backboard and the backboard and a solar cell piece wrapping material EVA are firmly and fixedly combined, thereby prolonging the service life of the backboard.
Description
Technical field
The present invention relates to technical field of solar batteries, be specifically related to solar cell backboard.
Background technology
Solar panel mainly is made up of header board, solar battery sheet and backboard, and wherein header board is the safety glass with high transmission rate, and solar battery sheet is sealed by EVA, and mainly playing of backboard intercepts steam and oxygen, mechanical protection and insulating effect.Now, the instructions for use of polycrystalline silicon solar cell assembly is 25 years, and the photovoltaic encapsulating material that the backboard conduct directly contacts with the external environment large tracts of land, it should possess performances such as remarkable anti-long-term ageing, insulation, steam obstruct.If backboard can't satisfy environmental test at aspects such as ageing-resistant, insulation, water-fast gas; Cause reliability, stability and the durability of solar cell to be protected the most at last; Make solar panel occur bad phenomenon such as delamination, be full of cracks, foaming, xanthochromia ahead of time; Cause that battery module comes off, the slippage of battery sheet, the reduction of battery effective output etc. be bad; More dangerous is, and electricity can appear in battery component under the situation of low voltage and current value beat the arc phenomenon, causes that battery component burns and inspires fire, causes personal security to damage and property loss.
PET has excellent physical and mechanical properties, and long-term serviceability temperature can reach 120 ℃, and short-term is used can anti-150 ℃ of high temperature, can anti--70 ℃ of low temperature, and very little to its influence during high and low temperature; Electrical insulating property is good, even under the high temperature high frequency, its electrical property is still better; Creep resistance, fatigue durability, rub resistance, dimensional stability are good; Gas and vapor permeability are low, and performance such as have good choke, block water is so solar cell backboard generally all uses the PET film to be used as support.
Research shows, contains a large amount of ester groups in the PET molecular backbone, with glassware for drinking water good compatibility is arranged, and is easy to generate water plasticising, even micro-simultaneously moisture also can cause the degraded of molecular backbone.The variation of PET ageing properties in the hydrothermal aging process receives three factor affecting: degree of crystallinity, water plasticising, hydrolysis, each factor from start to finish all in action, various different factors play a leading role in different environment and different stage.At the aging initial stage, factor is taken in crystallization as the leading factor, and it increases Young's modulus, maximum tensile stress; Material is become fragile, reduce impact strength, water plasticising becomes principal element then; It increases toughness of material, but very fast hydrolysis rises to principal element, and it causes the fracture of PET macromolecular chain; Molecular weight and molecular weight, thereby the destruction that causes mechanical performance.The rising of temperature then can make said process obviously accelerate, so water and heat are to cause the rapid main reasons for decrease of PET physical and mechanical properties.In addition, ultra-violet radiation also can make the molecular weight of PET, intensity descend significantly, and degree of crystallinity increases, thereby makes material embrittlement.
PVDF has strong, the good heat resistance of superelevation weatherability, ultra-violet radiation resisting, high chemical stability, high mechanical properties and toughness, antistick characteristic and anti-stain characteristic, so solar cell backboard is formed by the PET film and the two-layer up and down pvdf membrane pressing of centre usually.
Pvdf membrane and PET film are not easy bonding in the existing solar cell backboard, thereby make the easy embrittlement of backboard, and moisture-vapor transmission than higher degumming phenomenon takes place easily, and then influences the service life of solar cell.
Summary of the invention
In order to overcome the deficiency of prior art, the present invention provides strong solar cell backboard of a kind of weatherability and production technology thereof, and for reaching this purpose, the present invention adopts following technical scheme:
A kind of production technology of solar cell backboard is characterized in that, comprises the steps:
(1) adopt the surface of corona treatment PET film to make it to produce low temperature plasma, PET film surface produces radical reaction makes polymer that crosslinked, surperficial roughening take place, thereby has increased the polar solvent tack;
(2) the KS06 glue prepare adhesive of luxuriant and rich with fragrance chemical limited company of employing section; The host of KS06 glue and the curing agent weight ratio according to 50:9 is mixed; Through adding acetone or butanone solid content is controlled at 35%-45%, at this moment, the viscosity of adhesive is best;
(3) at the wherein one side coating adhesive equably of PET film, butt coating weight>=5.0g/m
2
(4) oven temperature is arranged on 60 ~ 80 ℃, dried has been coated with the PET film 1 ~ 2 minute of adhesive, and the hot-air in the baking oven contacts so that cyclone mode and PET film are surperficial;
(5) pressing PET film and pvdf membrane under the hot pressing state, the stitching surface of PET film is the one side that has been coated with adhesive, pressing-in temp is 70-75 ℃;
(6) repeating step (3) ~ (5) the another side coating adhesive of PET film, drying, with the pvdf membrane pressing;
(7) solidify the good solar cell backboard of pressing, condition of cure is: cold curing is more than 15 days, and perhaps 60 ℃ solidify more than 7 days.
A kind of solar cell backboard with above-mentioned explained hereafter obtains is characterized in that, comprises 5 layers of structure:
Ground floor is a pvdf membrane, and it has excellent intermiscibility with the EVA that seals solar battery sheet, and it act as bonding EVA and sunlight reflected is returned in the solar cell, has strong ultra-violet radiation resisting power simultaneously;
The second layer is a tack coat, and tack coat is formed by the KS06 glue preparation back coating of luxuriant and rich with fragrance chemical limited company of section, and its effect is bonding pvdf membrane and PET film;
The 3rd layer is the PET film that corona treatment is crossed, as supporting layer;
The 4th layer is tack coat, and tack coat is formed by the KS06 glue preparation back coating of luxuriant and rich with fragrance chemical limited company of section, and its effect is bonding pvdf membrane and PET film;
Layer 5 is a pvdf membrane, has high-weatherability, high chemical stability, high mechanical properties and toughness, strong, the good heat resistance of anti-stain characteristic.
The solar cell backboard of said explained hereafter has following advantage:
(1) combines closely, firmly difficult drop-off between said each layer of solar cell backboard and between backboard and the EVA;
(2) said solar cell backboard light transmittance is high, compares more attractive in appearance with other backboards;
(3) said solar cell backboard intercepts steam and oxygen, mechanical protection, stretch-proof, insulating capacity is strong;
(4) said solar cell backboard weather resistance is excellent, and temperature, hydrolysising aging, ultra-violet radiation are all had very strong patience, long service life.
Description of drawings
Fig. 1 is the structural representation of solar cell backboard of the present invention;
Label among the figure: 1-PVDF film, 2-tack coat, 3-PET film, 4-tack coat, 5-PVDF film.
The specific embodiment
A kind of production technology of solar cell backboard is characterized in that, comprises the steps:
(1) adopt the surface of corona treatment PET film to make it to produce low temperature plasma, PET film surface produces radical reaction makes polymer that crosslinked, surperficial roughening take place, thereby has increased the polar solvent tack;
(2) the KS06 glue prepare adhesive of luxuriant and rich with fragrance chemical limited company of employing section mixes the host and the weight ratio of curing agent according to 50:9 of KS06 glue, through interpolation acetone solid content is controlled at 35%;
(3) at the wherein one side coating adhesive equably of PET film, butt coating weight 5.0g/m
2
(4) oven temperature is arranged on 60 ℃, dried has been coated with the PET film 2 minutes of adhesive, and the hot-air in the baking oven contacts so that cyclone mode and PET film are surperficial;
(5) pressing PET film and pvdf membrane under the hot pressing state, the stitching surface of PET film is the one side that has been coated with adhesive, pressing-in temp is 70 ℃;
(6) repeating step (3) ~ (5) the another side coating adhesive of PET film, drying, with the pvdf membrane pressing;
(7) solidify the good solar cell backboard of pressing, condition of cure is: cold curing 15 days.
Embodiment 2:
A kind of production technology of solar cell backboard is characterized in that, comprises the steps:
(1) adopt the surface of corona treatment PET film to make it to produce low temperature plasma, PET film surface produces radical reaction makes polymer that crosslinked, surperficial roughening take place, thereby has increased the polar solvent tack;
(2) the KS06 glue prepare adhesive of luxuriant and rich with fragrance chemical limited company of employing section mixes the host and the weight ratio of curing agent according to 50:9 of KS06 glue, through the interpolation butanone solid content is controlled at 40%;
(3) at the wherein one side coating adhesive equably of PET film, butt coating weight 7.0g/m
2
(4) oven temperature is arranged on 70 ℃, dried has been coated with the PET film 1.5 minutes of adhesive, and the hot-air in the baking oven contacts so that cyclone mode and PET film are surperficial;
(5) pressing PET film and pvdf membrane under the hot pressing state, the stitching surface of PET film is the one side that has been coated with adhesive, pressing-in temp is 72 ℃;
(6) repeating step (3) ~ (5) the another side coating adhesive of PET film, drying, with the pvdf membrane pressing;
(7) solidify the good solar cell backboard of pressing, condition of cure is: 60 ℃ solidified 7 days.
Embodiment 3
A kind of production technology of solar cell backboard is characterized in that, comprises the steps:
(1) adopt the surface of corona treatment PET film to make it to produce low temperature plasma, PET film surface produces radical reaction makes polymer that crosslinked, surperficial roughening take place, thereby has increased the polar solvent tack;
(2) the KS06 glue prepare adhesive of luxuriant and rich with fragrance chemical limited company of employing section mixes the host and the weight ratio of curing agent according to 50:9 of KS06 glue, through interpolation acetone solid content is controlled at 45%;
(3) at the wherein one side coating adhesive equably of PET film, butt coating weight 9.0g/m
2
(4) oven temperature is arranged on 80 ℃, dried has been coated with the PET film 1 minute of adhesive, and the hot-air in the baking oven contacts so that cyclone mode and PET film are surperficial;
(5) pressing PET film and pvdf membrane under the hot pressing state, the stitching surface of PET film is the one side that has been coated with adhesive, pressing-in temp is 75 ℃;
(6) repeating step (3) ~ (5) the another side coating adhesive of PET film, drying, with the pvdf membrane pressing;
(7) solidify the good solar cell backboard of pressing, condition of cure is: cold curing 20 days.
Embodiment 4:
Be that with embodiment 2 differences condition of cure is in the step (7): 60 ℃ solidified 9 days.
Solar cell backboard as shown in Figure 1, that embodiment 1 ~ 4 obtains comprises 5 layers of structure from top to bottom: ground floor is pvdf membrane (1); The second layer is the tack coat (2) that the KS06 glue application by luxuriant and rich with fragrance chemical limited company of section forms; The 3rd layer is the PET film of crossing as the corona treatment of supporting layer (3); The 4th layer is the tack coat (4) identical with the second layer; Layer 5 is pvdf membrane (5).
Through each item test, the technical performance parameter that embodiment 1 ~ 4 production obtains solar cell backboard is following:
(1) electrical insulation properties test: said solar cell backboard breakdown voltage is higher than 20KV, shelf depreciation voltage is higher than 1000V;
(2) hydrolysis ageing properties test: not embrittlement said solar cell backboard is handled 96 hours under 120 ℃, the condition of 100% relative humidity after;
(3) dimensional stability test: said solar cell backboard was handled 0.5 hour under 150 ℃ of conditions, and shrinkage factor is less than 1%;
(4) 180o peel strength test: the peel strength of said solar cell backboard and EVA is higher than 40N/cm, and the peel strength of PET film and pvdf membrane is higher than 25 N/cm in the said solar cell backboard;
(5) moisture-vapor transmission performance test: said solar cell backboard moisture-vapor transmission is less than 1.0g ∕ m2/24h;
(6) tensile property test: said solar cell backboard hot strength is higher than 110MPa, and the extension at break degree is higher than 80%;
(7) anti-ultraviolet property test: after 2000 hours, no variable color, no delamination do not have bubble yet and produce said solar cell backboard through the UVA-340 ultra violet lamp.
Claims (5)
1. the production technology of a solar cell backboard is characterized in that, comprises the steps:
(1) surface of employing corona treatment PET film makes it to produce low temperature plasma, and PET film surface produces radical reaction makes polymer that crosslinked, surperficial roughening take place, thereby has increased the polar solvent tack;
(2) the KS06 glue prepare adhesive of luxuriant and rich with fragrance chemical limited company of employing section; The host of KS06 glue and the curing agent weight ratio according to 50:9 is mixed; Through adding acetone or butanone solid content is controlled at 35%-45%, at this moment, the viscosity of adhesive is best;
(3) at the wherein one side coating adhesive equably of PET film, butt coating weight>=5.0g/m
2
(4) oven temperature is arranged on 60 ~ 80 ℃, dried has been coated with the PET film 1 ~ 2 minute of adhesive, and the hot-air in the baking oven contacts so that cyclone mode and PET film are surperficial;
(5) pressing PET film and pvdf membrane under the hot pressing state, the stitching surface of PET film is the one side that has been coated with adhesive, pressing-in temp is 70-75 ℃;
(6) repeating step (3) ~ (5) the another side coating adhesive of PET film, drying, with the pvdf membrane pressing;
(7) solidify the good solar cell backboard of pressing, condition of cure is: cold curing is more than 15 days, and perhaps 60 ℃ solidify more than 7 days.
2. the production technology of a kind of solar cell backboard as claimed in claim 1 is characterized in that, corona treatment described in the step (1) is handled for the plasma corona.
3. the production technology of a kind of solar cell backboard as claimed in claim 1; It is characterized in that; Step (4) is: oven temperature is arranged on 80 ℃, and dried has been coated with the PET film 1 minute of adhesive, and the hot-air in the baking oven contacts so that cyclone mode and PET film are surperficial.
4. the production technology of a kind of solar cell backboard as claimed in claim 1 is characterized in that, step (7) condition of cure is: cold curing 20 days.
5. a kind of solar cell backboard of obtaining of explained hereafter according to claim 1 is characterized in that said solar cell backboard is transparent attractive in appearance, comprises 5 layers of structure:
Ground floor is a pvdf membrane, and it has excellent intermiscibility with the EVA that seals solar battery sheet, and effect is bonding EVA and sunlight reflected returned in the solar cell to have strong ultra-violet radiation resisting power simultaneously;
The second layer is a tack coat, and tack coat is formed by the KS06 glue preparation back coating of luxuriant and rich with fragrance chemical limited company of section, and its effect is bonding pvdf membrane and PET film;
The 3rd layer is the PET film that corona treatment is crossed, as supporting layer;
The 4th layer is tack coat, and tack coat is formed by the KS06 glue preparation back coating of luxuriant and rich with fragrance chemical limited company of section, and its effect is bonding pvdf membrane and PET film;
Layer 5 is a pvdf membrane, has high-weatherability, high chemical stability, high mechanical properties and toughness, strong, the good heat resistance of anti-stain characteristic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110385024XA CN102514343A (en) | 2011-11-29 | 2011-11-29 | Solar cell backboard and production technique thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110385024XA CN102514343A (en) | 2011-11-29 | 2011-11-29 | Solar cell backboard and production technique thereof |
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| CN102514343A true CN102514343A (en) | 2012-06-27 |
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| CN201110385024XA Pending CN102514343A (en) | 2011-11-29 | 2011-11-29 | Solar cell backboard and production technique thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103560164A (en) * | 2013-11-20 | 2014-02-05 | 无锡中洁能源技术有限公司 | Fluorine-containing radiating type solar cell backboard |
| CN103928552A (en) * | 2013-01-10 | 2014-07-16 | 中天光伏材料有限公司 | Coating type FPC-structure solar cell backboard |
| CN104253170A (en) * | 2013-06-25 | 2014-12-31 | 明冠能源(江西)有限公司 | High-integration solar photovoltaic module package backboard and preparation method thereof |
| CN112786724A (en) * | 2021-01-07 | 2021-05-11 | 浙江歌瑞新材料有限公司 | Transparent photovoltaic backboard with high weather resistance and low water vapor transmittance |
| CN114122410A (en) * | 2021-11-18 | 2022-03-01 | 合肥国轩高科动力能源有限公司 | Multilayer net-shaped current collector of lithium ion battery and manufacturing method thereof |
-
2011
- 2011-11-29 CN CN201110385024XA patent/CN102514343A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103928552A (en) * | 2013-01-10 | 2014-07-16 | 中天光伏材料有限公司 | Coating type FPC-structure solar cell backboard |
| CN104253170A (en) * | 2013-06-25 | 2014-12-31 | 明冠能源(江西)有限公司 | High-integration solar photovoltaic module package backboard and preparation method thereof |
| CN103560164A (en) * | 2013-11-20 | 2014-02-05 | 无锡中洁能源技术有限公司 | Fluorine-containing radiating type solar cell backboard |
| CN112786724A (en) * | 2021-01-07 | 2021-05-11 | 浙江歌瑞新材料有限公司 | Transparent photovoltaic backboard with high weather resistance and low water vapor transmittance |
| CN114122410A (en) * | 2021-11-18 | 2022-03-01 | 合肥国轩高科动力能源有限公司 | Multilayer net-shaped current collector of lithium ion battery and manufacturing method thereof |
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Application publication date: 20120627 |