CN104403388A - PTFE paint for solar cell back plate and preparation method thereof - Google Patents
PTFE paint for solar cell back plate and preparation method thereof Download PDFInfo
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- CN104403388A CN104403388A CN201410644622.8A CN201410644622A CN104403388A CN 104403388 A CN104403388 A CN 104403388A CN 201410644622 A CN201410644622 A CN 201410644622A CN 104403388 A CN104403388 A CN 104403388A
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Abstract
The invention discloses PTFE paint for a solar cell back plate and a preparation method thereof. The paint is prepared from the following raw materials in parts by weight: 72-80 parts of PTFE, 10-15 parts of 2-hydroxyethyl acrylate, 13-17 parts of 2,2,3,4,4,4-hexafluorobutyl methacrylate, 7-11 parts of diphenylmethane-4,4'-diisocyanate, 7-11 parts of neopentanediol monoacrylate, 5-9 parts of benzoyl peroxide, 5-9 parts of 4-methylmorpholine, 3-6 parts of diethylamine, 3-6 parts of poly(dimethylsiloxane), 4-6 parts of an olefin acid, 2-5 parts of a levelling agent, 4-7 parts of KH560, and 1-4 parts of poly(3-methylthiophene). Under the premise of not changing the excellent weatherability of the paint, the paint is endowed with heat conduction performance and wear resistance, and is capable of improving the environment adaptability of a coating type solar cell back plate and prolonging the service life. Also, the production process is simple, the production cost is low, and the paint is environment-friendly.
Description
Technical field
The present invention relates to a kind of solar cell backboard PTFE coating and preparation method thereof.
Background technology
Along with Nonrenewable resources gradually reduce and mineral substance resource produce, use in produce various pollutions ask interest, each state all with policy, the means of law progressively strengthen exploitation to the renewable energy resources and clean energy, and make great efforts to improve its ratio in the whole energy uses.At these in clean and renewable energy source, sun power is wherein one of most important energy.Solar energy power generating more and more becomes the part in our life, and country 12 plan is set in 15GW total installation in 2015, and this just can quietly become from solar electrical energy generation in the near future predictive of a part for our household electricity.For photovoltaic generation industry, while improving constantly technology, more to reduce costs.What current solar facilities was conventional is solar panel, and it is the visual plant converted solar energy into electrical energy.Solar panel mainly comprises glass, EVA glued membrane, frame, notacoria, terminal box, silica gel etc., other material at present except notacoria realizes highly domesticizing in Chinese photovoltaic industry all, greatly reduces the manufacturing cost of solar module unit generated output.But, notacoria is as the important solar module packaged material of a class, its technical threshold requires quite high, in addition relevant raw materials restricts by the patented technology of the fluorine chemical giant that goes abroad for a long time, even to this day its degree domestic is still extremely low, the notacoria causing present domestic solar module manufacturer to adopt is mostly external imported product, and the higher and Lead Time of price can not ensure.Therefore, from the manufacturing cost angle reducing solar module unit generated output, notacoria production domesticization is the inevitable choice of Chinese photovoltaic enterprise.
Due to too old can battery modules be placed on outdoor electric product, therefore backboard is except having defencive function, reliable insulating property, water preventing ability, the ageing-resistant performance that also must to possess 25 years.If the performance that sun power backboard intercepts vapor permeation is bad, moisture (especially overcast and rainy moisture is larger) then in air can enter into inner side through sun power backboard, the infiltration of water vapour can have influence on the adhesive property of EVA (ethene one acetate ethylene copolymer), cause backboard and EVA to depart from, and then make more moistures directly contact cell piece and make cell piece oxidized.This type of service life of the products generally designed according to more than 25 years; guarantee the time limit of service that product reaches so long; just need each assembly quality of strict control; and the effect of solar cell backboard should not be underestimated in these assemblies, solar cell backboard plays a part to protect the cell piece in photovoltaic module.As the major parts of solar electrical energy generation, the quality of photovoltaic module very important, and the raw material of the life-span of photovoltaic module and its use is closely related.In all raw materials, the plastic components life-span is the shortest.So in photovoltaic module the life-span of plastic components determine the life-span of photovoltaic module.In all plastic components, backboard is most important beyond doubt.Backboard is cost proportion the best part in all packaged materials, and due to the rapid reduction of silicon materials price, it also becomes one of assembly cost important composition.The cost of backboard determined by its material used, and the life-span of differing materials is different, whether can meet the problem that 25 year life-span also became more and more assembly factory and the user that generates electricity is concerned about of component calls.If notacoria cannot meet the solar module environmental test of 25 years in ageing-resistant, resistance to insulation, resistance to aqueous vapor etc., the reliability of solar cell, stability and weather resistance is caused to be protected the most at last, cause battery module to come off, cell piece slippage, battery useful output reduction etc. be bad, more it is a risk that battery component can occur when low voltage and current value that electricity beats arc phenomenon, cause battery component to burn and inspire fire, causing personal security to damage and property damage.
Backboard conventional at present has various structures, can be divided into double-side fluorine back film (as TPT), the fluorine-containing notacoria of one side (as TPE), not fluorine-containing notacoria (how being composited gluing for multilayer PET by tackiness agent) and coating notacoria four class.The moisture of trace and wherein about the research of not fluorine-containing notacoria, research shows, containing a large amount of ester groups in PET molecular backbone chain, has good affinity with glassware for drinking water, easily produces water plasticising, even if also can cause the degraded of molecular backbone chain simultaneously.The change of PET aging resistance in hydrothermal aging process affects by three factors: degree of crystallinity, water plasticising, hydrolysis, each factor from start to finish all in action, different environment and in the different stages various Different factor play a leading role.The aging initial stage, factor is taken in crystallization as the leading factor, it increases Young's modulus, maximum tensile stress, but material is become fragile, and reduces shock strength, then water plasticising becomes principal element, it makes toughness of material increase, but very fast hydrolysis reaction rises to principal element, and it causes PET macromolecular chain to rupture, molecular weight and molecular weight, thus the destruction causing mechanical property.The rising of temperature then can make said process obviously accelerate, and therefore water and heat are the major causes causing PET physical and mechanical properties sharply to decline.In addition, uv-radiation also can make the molecular weight of PET, strength and elongation significantly declines, and degree of crystallinity increases, thus makes material embrittlement.Therefore, by tackiness agent gluing for the multilayer PET not fluorine-containing notacoria be composited just cannot be met from material self character environmental test and the service requirementss such as damp and hot, xeothermic, the ultraviolet of commercial crystal silicon solar battery assembly 25 years, also just be difficult to the encapsulation being suitable for crystal silicon solar battery assembly.
The fluorine material on fluorine-containing notacoria surface due to fluorine element electronegativity large, van der Waals radius is little, carbon-fluorine bond bond energy extremely strong (up to 485KJ/mol), and its uniqueness fluoridize that volution rodlike molecule in chain one-piece construction is tight, firm, surface smoothing, make the properties such as the weathering resistance of fluoro-resin, thermotolerance, resistant of high or low temperature and chemical proofing all very superior.The excellent specific property of fluoro-resin makes fluorine material (fluorine film or fluorocarbon coating) have excellent weathering performance, can ensure the reliability that long-term outdoor uses.But fluoro-resin has outstanding not viscosity, limits the application that it is industrial.It is fabulous non-stick material, and this performance makes again the surface adhesive of it and other objects very difficult.Mostly fluorine-containing multiple glue-type solar cell notacoria (TPT, KPK etc.) is to be bondd by tackiness agent and PET base material with fluorine films such as PVF or PTFE to be composited.And differ due to the quality level of tackiness agent, in addition recombining process is very different, in the outdoor life-time service process of battery component, compound notacoria is subject to the combined influence of humidity and temperature dual factor, the infringements such as easy generation glue line hydrolysis, finally cause fluorine film (PVF or PTFE etc.) and the splitting of PET base material, be difficult to meet the long-term reliability requirement of battery component.Meanwhile, owing to manufacturing the reasons such as the hydrophilically modified treatment technology of patented technology restriction and fluorine film surface, the fluorine film products such as current PVF and PTFE also do not realize production domesticization in China.Therefore, the Chinese Enterprise of the fluorine film Development and Production double-side fluorine solar cell notacorias such as PVF or PTFE is adopted to be limited by foreign Fu Mo manufacturers for a long time, its notacoria manufacturing cost remains high, and be applicable to the high-quality tackiness agent that fluorine film and PET bond and mostly be external only a few manufacturer technical monopoly, be difficult to import.And more domestic notacoria manufacturing enterprises can only adopt some common urethane, epoxy or acrylic tackifiers, these tackiness agent are easily aging, and performance cannot meet the life requirement of 25 years.
Fluorocarbon coating is through the fast development of decades, be used widely in the every field of building, chemical industry, electric appliance and electronic industry, mechanical industry, aerospace industries, household supplies, become after acrylic coating, polyurethane coating, the contour performance coating of organosilicon coating, the coating variety that over-all properties is the highest.At present, Application comparison widely fluorine resin coating mainly contains PVDF, PCTFE, PTFE three major types type, and after the Ye Shiji U.S. of China, Japan, the 3rd has fluorocarbon coating synthetic technology and realize the country of industrialization.Be fluorocarbon coating prepared by matrix resin with PTFE, CTFE, PTFE resin of fluoro-resin multinational enterprise (as [2] such as Japan AGC, great Jin and French A Kema) Development and Production, be widely used in the surfacecti proteon of bridge, mansion, railway, communications facility, and subjected to the outdoor ordeal of more than 40 years, show splendid weather resistance.Therefore, fluorocarbon coating, PET process for modifying surface, fluorine coating process for modifying surface etc. are applied to the exploitation of solar cell notacoria, thus realize not using tackiness agent and the low-cost high-quality application type notacoria product with excellent long-term weatherability performance is feasible, be also the only way of back membrane material development from now on and production domesticization.
In view of the reality of the unrealized production domesticization of multiple glue-type solar cell notacoria fluorine film and the inner compound of notacoria stick with glue the test that agent is difficult to stand hydrothermal aging in the outdoor life-time service process of assembly, develop a class do not use tackiness agent, there is higher integrated degree and there is the high-quality notacoria product of low cost of excellent long-term weatherability performance, be the exploitation of current notacoria and the direction of technical development and trend.
Summary of the invention
The object of the present invention is to provide a kind of solar cell backboard PTFE coating and preparation method thereof, this coating is avoided using tackiness agent, having higher integrated degree and have excellent long-term weatherability performance simultaneously in the preparation of backboard.
To achieve these goals, the invention provides a kind of solar cell backboard PTFE coating, obtained by the raw material of following weight part: PTFE72-80 part, Hydroxyethyl acrylate 10-15 part, Hexafluorobutyl mathacrylate 13-17 part, diphenylmethanediisocyanate 7-11 part, neopentyl glycol mono acrylic ester 7-11 part, dibenzoyl peroxide 5-9 part, N-methylmorpholine 5-9 part, diethylamine diamines 3-6 part, polydimethylsiloxane 3-6 part, olefin(e) acid 4-6 part, flow agent 2-5 part, KH560 4-7 part, poly-3 methyl thiophene 1-4 part.
Screening formulation is obtained by the raw material of following weight part: PTFE72 part, Hydroxyethyl acrylate 10 parts, Hexafluorobutyl mathacrylate 13 parts, diphenylmethanediisocyanate 7 parts, neopentyl glycol mono acrylic ester 7 parts, dibenzoyl peroxide 5 parts, N-methylmorpholine 5 parts, diethylamine diamines 3 parts, polydimethylsiloxane 3 parts, olefin(e) acid 4 parts, flow agent 2 parts, KH560 4 parts, poly-3 methyl thiophene 1 part.
Screening formulation is obtained by the raw material of following weight part: PTFE80 part, Hydroxyethyl acrylate 15 parts, Hexafluorobutyl mathacrylate 17 parts, diphenylmethanediisocyanate 11 parts, neopentyl glycol mono acrylic ester 11 parts, dibenzoyl peroxide 9 parts, N-methylmorpholine 9 parts, diethylamine diamines 6 parts, polydimethylsiloxane 6 parts, olefin(e) acid 6 parts, flow agent 5 parts, KH560 7 parts, poly-3 methyl thiophene 4 parts.
Screening formulation is obtained by the raw material of following weight part: PTFE74 part, Hydroxyethyl acrylate 12 parts, Hexafluorobutyl mathacrylate 14 parts, diphenylmethanediisocyanate 8 parts, neopentyl glycol mono acrylic ester 8 parts, dibenzoyl peroxide 6 parts, N-methylmorpholine 6 parts, diethylamine diamines 4 parts, polydimethylsiloxane 4 parts, olefin(e) acid 5 parts, flow agent 3 parts, KH560 5 parts, poly-3 methyl thiophene 2 parts.
Screening formulation is obtained by the raw material of following weight part: PTFE78 part, Hydroxyethyl acrylate 14 parts, Hexafluorobutyl mathacrylate 16 parts, diphenylmethanediisocyanate 10 parts, neopentyl glycol mono acrylic ester 9 parts, dibenzoyl peroxide 8 parts, N-methylmorpholine 7 parts, diethylamine diamines 5 parts, polydimethylsiloxane 5 parts, olefin(e) acid 5 parts, flow agent 4 parts, KH560 6 parts, poly-3 methyl thiophene 3 parts.
Described olefin(e) acid is vinylformic acid, methacrylic acid or undecylenic acid.
Described flow agent is propylene glycol methyl ether acetate.
A preparation method for solar cell backboard PTFE coating, comprises the following steps: take each raw material according to weight part ratio, adds in reactor, opens reactor and stir 2.5-3 hour at 70-75 DEG C, be then cooled to room temperature discharging, the product obtained.
The present invention has following beneficial effect: the coating in the present invention is under the prerequisite of weather resistance not changing its excellence, and give coating heat transfer, wear-resisting performance, can improve the environmental adaptation of application type sun power backboard, increase the service life.And production process of the present invention is simple, low production cost, environmental protection.
Embodiment
embodiment 1
A kind of solar cell backboard PTFE coating of the present embodiment, is obtained by the raw material of following weight part: PTFE72 part, Hydroxyethyl acrylate 10 parts, Hexafluorobutyl mathacrylate 13 parts, diphenylmethanediisocyanate 7 parts, neopentyl glycol mono acrylic ester 7 parts, dibenzoyl peroxide 5 parts, N-methylmorpholine 5 parts, diethylamine diamines 3 parts, polydimethylsiloxane 3 parts, olefin(e) acid 4 parts, flow agent 2 parts, KH560 4 parts, poly-3 methyl thiophene 1 part.
Described olefin(e) acid is vinylformic acid.
Described flow agent is propylene glycol methyl ether acetate.
A kind of solar cell backboard PTFE coating of the present embodiment, comprises the following steps: take each raw material according to weight part ratio, adds in reactor, opens reactor and stirs 2.5 hours at 75 DEG C, be then cooled to room temperature discharging, the product obtained.
embodiment 2
A kind of solar cell backboard PTFE coating of the present embodiment, is obtained by the raw material of following weight part: PTFE80 part, Hydroxyethyl acrylate 15 parts, Hexafluorobutyl mathacrylate 17 parts, diphenylmethanediisocyanate 11 parts, neopentyl glycol mono acrylic ester 11 parts, dibenzoyl peroxide 9 parts, N-methylmorpholine 9 parts, diethylamine diamines 6 parts, polydimethylsiloxane 6 parts, olefin(e) acid 6 parts, flow agent 5 parts, KH560 7 parts, poly-3 methyl thiophene 4 parts.
Described olefin(e) acid is methacrylic acid.
Described flow agent is propylene glycol methyl ether acetate.
A kind of solar cell backboard PTFE coating of the present embodiment, comprises the following steps: take each raw material according to weight part ratio, adds in reactor, opens reactor and stirs 3 hours at 75 DEG C, be then cooled to room temperature discharging, the product obtained.
embodiment 3
A kind of solar cell backboard PTFE coating of the present embodiment, is obtained by the raw material of following weight part: PTFE74 part, Hydroxyethyl acrylate 12 parts, Hexafluorobutyl mathacrylate 14 parts, diphenylmethanediisocyanate 8 parts, neopentyl glycol mono acrylic ester 8 parts, dibenzoyl peroxide 6 parts, N-methylmorpholine 6 parts, diethylamine diamines 4 parts, polydimethylsiloxane 4 parts, olefin(e) acid 5 parts, flow agent 3 parts, KH560 5 parts, poly-3 methyl thiophene 2 parts.
Described olefin(e) acid is undecylenic acid.
Described flow agent is propylene glycol methyl ether acetate.
A kind of solar cell backboard PTFE coating of the present embodiment, comprises the following steps: take each raw material according to weight part ratio, adds in reactor, opens reactor and stirs 2.5 hours at 70 DEG C, be then cooled to room temperature discharging, the product obtained.
embodiment 4
A kind of solar cell backboard PTFE coating of the present embodiment, is obtained by the raw material of following weight part: PTFE78 part, Hydroxyethyl acrylate 14 parts, Hexafluorobutyl mathacrylate 16 parts, diphenylmethanediisocyanate 10 parts, neopentyl glycol mono acrylic ester 9 parts, dibenzoyl peroxide 8 parts, N-methylmorpholine 7 parts, diethylamine diamines 5 parts, polydimethylsiloxane 5 parts, olefin(e) acid 5 parts, flow agent 4 parts, KH560 6 parts, poly-3 methyl thiophene 3 parts.
Described olefin(e) acid is vinylformic acid.
Described flow agent is propylene glycol methyl ether acetate.
A kind of solar cell backboard PTFE coating of the present embodiment, comprises the following steps: take each raw material according to weight part ratio, adds in reactor, opens reactor and stirs 3 hours at 70 DEG C, be then cooled to room temperature discharging, the product obtained.
embodiment 5
By coating obtained for embodiment 1-4, by the sample preparation of HG/T-3792-2005 standard and detection perform, detected result is as shown in table 1.
The coating detected result that table 1 embodiment of the present invention is obtained
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Hardness (pencil hardness) | 3H | 3H | 3H | 3H |
| Sticking power (MPa) | 10 | 11 | 10 | 10 |
| Hydrophobic angle, ° | 119 | 118 | 119 | 121 |
| Shock strength, (positive and negative impact) cm | 51 | 48 | 49 | 49 |
| Acid resistance (10% sulfuric acid, normal temperature, 250h) | Unchanged | Unchanged | Unchanged | Unchanged |
| Alkali resistance (10% sodium hydroxide, normal temperature, 250h) | Unchanged | Unchanged | Unchanged | Unchanged |
| Salt fog resistance, 1000h | 15.05 | 15.06 | 15.11 | 15.12 |
| Artificial weathering, 1000h | Unchanged | Unchanged | Unchanged | Unchanged |
Simultaneously also by the coating of each embodiment above-mentioned, respectively according to national QB/T2730.1-2005, QB/T2603-2007, GB/T13217.2-2009, GB/T 18724-2008/ISO 2836:2004 standard detection.To the quality inspection index of coating, as proportion, pH value, surface tension, viscosity, specific conductivity etc. detect, detected result all meets national GB.
Claims (8)
1. a solar cell backboard PTFE coating, is characterized in that the raw material comprising following weight part: PTFE72-80 part, Hydroxyethyl acrylate 10-15 part, Hexafluorobutyl mathacrylate 13-17 part, diphenylmethanediisocyanate 7-11 part, neopentyl glycol mono acrylic ester 7-11 part, dibenzoyl peroxide 5-9 part, N-methylmorpholine 5-9 part, diethylamine diamines 3-6 part, polydimethylsiloxane 3-6 part, olefin(e) acid 4-6 part, flow agent 2-5 part, KH560 4-7 part, poly-3 methyl thiophene 1-4 part.
2. according to a kind of solar cell backboard PTFE coating described in claim 1, it is characterized in that being obtained by the raw material of following weight part: PTFE72 part, Hydroxyethyl acrylate 10 parts, Hexafluorobutyl mathacrylate 13 parts, diphenylmethanediisocyanate 7 parts, neopentyl glycol mono acrylic ester 7 parts, dibenzoyl peroxide 5 parts, N-methylmorpholine 5 parts, diethylamine diamines 3 parts, polydimethylsiloxane 3 parts, olefin(e) acid 4 parts, flow agent 2 parts, KH560 4 parts, poly-3 methyl thiophene 1 part.
3. according to a kind of solar cell backboard PTFE coating described in claim 1, it is characterized in that being obtained by the raw material of following weight part: PTFE80 part, Hydroxyethyl acrylate 15 parts, Hexafluorobutyl mathacrylate 17 parts, diphenylmethanediisocyanate 11 parts, neopentyl glycol mono acrylic ester 11 parts, dibenzoyl peroxide 9 parts, N-methylmorpholine 9 parts, diethylamine diamines 6 parts, polydimethylsiloxane 6 parts, olefin(e) acid 6 parts, flow agent 5 parts, KH560 7 parts, poly-3 methyl thiophene 4 parts.
4. according to a kind of solar cell backboard PTFE coating described in claim 1, it is characterized in that being obtained by the raw material of following weight part: PTFE74 part, Hydroxyethyl acrylate 12 parts, Hexafluorobutyl mathacrylate 14 parts, diphenylmethanediisocyanate 8 parts, neopentyl glycol mono acrylic ester 8 parts, dibenzoyl peroxide 6 parts, N-methylmorpholine 6 parts, diethylamine diamines 4 parts, polydimethylsiloxane 4 parts, olefin(e) acid 5 parts, flow agent 3 parts, KH560 5 parts, poly-3 methyl thiophene 2 parts.
5. according to a kind of solar cell backboard PTFE coating described in claim 1, it is characterized in that being obtained by the raw material of following weight part: PTFE78 part, Hydroxyethyl acrylate 14 parts, Hexafluorobutyl mathacrylate 16 parts, diphenylmethanediisocyanate 10 parts, neopentyl glycol mono acrylic ester 9 parts, dibenzoyl peroxide 8 parts, N-methylmorpholine 7 parts, diethylamine diamines 5 parts, polydimethylsiloxane 5 parts, olefin(e) acid 5 parts, flow agent 4 parts, KH560 6 parts, poly-3 methyl thiophene 3 parts.
6., according to a kind of solar cell backboard PTFE coating described in claim 1, it is characterized in that described olefin(e) acid is vinylformic acid, methacrylic acid or undecylenic acid.
7., according to a kind of solar cell backboard PTFE coating described in claim 1, it is characterized in that described flow agent is propylene glycol methyl ether acetate.
8. the preparation method of a kind of solar cell backboard PTFE coating according to any one of claim 1-7, it is characterized in that comprising the following steps: take each raw material according to weight part ratio, add in reactor, open reactor and stir 2.5-3 hour at 70-75 DEG C, then room temperature discharging is cooled to, the product obtained.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410644622.8A CN104403388A (en) | 2014-11-14 | 2014-11-14 | PTFE paint for solar cell back plate and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410644622.8A CN104403388A (en) | 2014-11-14 | 2014-11-14 | PTFE paint for solar cell back plate and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103183992A (en) * | 2013-03-22 | 2013-07-03 | 平湖市华源光伏材料有限公司 | Fluorocarbon coating for solar energy battery back panel |
| CN103287044A (en) * | 2012-03-01 | 2013-09-11 | 佛山佛塑科技集团股份有限公司 | Polyvinylidene fluoride (PVDF) film for back board of solar battery and manufacturing method of PVDF film |
| CN103827203A (en) * | 2011-09-30 | 2014-05-28 | 大金工业株式会社 | Composition and coated article |
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2014
- 2014-11-14 CN CN201410644622.8A patent/CN104403388A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103827203A (en) * | 2011-09-30 | 2014-05-28 | 大金工业株式会社 | Composition and coated article |
| CN103287044A (en) * | 2012-03-01 | 2013-09-11 | 佛山佛塑科技集团股份有限公司 | Polyvinylidene fluoride (PVDF) film for back board of solar battery and manufacturing method of PVDF film |
| CN103183992A (en) * | 2013-03-22 | 2013-07-03 | 平湖市华源光伏材料有限公司 | Fluorocarbon coating for solar energy battery back panel |
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