CN103725209B - EVA film and preparation method thereof - Google Patents
EVA film and preparation method thereof Download PDFInfo
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- CN103725209B CN103725209B CN201310645913.4A CN201310645913A CN103725209B CN 103725209 B CN103725209 B CN 103725209B CN 201310645913 A CN201310645913 A CN 201310645913A CN 103725209 B CN103725209 B CN 103725209B
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- tert
- butyl
- vinyl acetate
- eva film
- ethyl
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- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 52
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 52
- GJBRNHKUVLOCEB-UHFFFAOYSA-N tert-butyl benzenecarboperoxoate Chemical compound CC(C)(C)OOC(=O)C1=CC=CC=C1 GJBRNHKUVLOCEB-UHFFFAOYSA-N 0.000 claims abstract description 30
- NZYMWGXNIUZYRC-UHFFFAOYSA-N hexadecyl 3,5-ditert-butyl-4-hydroxybenzoate Chemical compound CCCCCCCCCCCCCCCCOC(=O)C1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NZYMWGXNIUZYRC-UHFFFAOYSA-N 0.000 claims abstract description 27
- PEXYOZSKYQBQIH-UHFFFAOYSA-N trimethyl-[2-(7-oxabicyclo[4.1.0]heptan-4-yl)ethyl]silane Chemical compound C1C(CC[Si](C)(C)C)CCC2OC21 PEXYOZSKYQBQIH-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000003960 organic solvent Substances 0.000 claims abstract description 12
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 claims description 38
- 229920001577 copolymer Polymers 0.000 claims description 38
- -1 2,2 '-methylene Chemical group 0.000 claims description 25
- FKMUJSDGDJFLLO-UHFFFAOYSA-N 2-ethylhexyl hydrogen carbonate 2-hydroperoxy-2-methylpropane Chemical compound C(OCC(CCCC)CC)(O)=O.C(C)(C)(C)OO FKMUJSDGDJFLLO-UHFFFAOYSA-N 0.000 claims description 25
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 24
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- 238000004132 cross linking Methods 0.000 claims description 16
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical group CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 11
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 10
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 8
- 239000006096 absorbing agent Substances 0.000 claims description 8
- 239000003963 antioxidant agent Substances 0.000 claims description 8
- 230000003078 antioxidant effect Effects 0.000 claims description 8
- 238000005469 granulation Methods 0.000 claims description 4
- 230000003179 granulation Effects 0.000 claims description 4
- 239000013618 particulate matter Substances 0.000 claims description 4
- 238000005453 pelletization Methods 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 238000002834 transmittance Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 238000005538 encapsulation Methods 0.000 abstract 2
- GPNYZBKIGXGYNU-UHFFFAOYSA-N 2-tert-butyl-6-[(3-tert-butyl-5-ethyl-2-hydroxyphenyl)methyl]-4-ethylphenol Chemical compound CC(C)(C)C1=CC(CC)=CC(CC=2C(=C(C=C(CC)C=2)C(C)(C)C)O)=C1O GPNYZBKIGXGYNU-UHFFFAOYSA-N 0.000 abstract 1
- CFTHJHLCMXQJHI-UHFFFAOYSA-N 2-tert-butylperoxy-2-methylpropane;2-ethylhexyl hydrogen carbonate Chemical compound CC(C)(C)OOC(C)(C)C.CCCCC(CC)COC(O)=O CFTHJHLCMXQJHI-UHFFFAOYSA-N 0.000 abstract 1
- 239000006185 dispersion Substances 0.000 abstract 1
- 238000004383 yellowing Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 13
- 239000002313 adhesive film Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 230000032683 aging Effects 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000007639 printing Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000012991 xanthate Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/875—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling for achieving a non-uniform temperature distribution, e.g. using barrels having both cooling and heating zones
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
Abstract
The invention relates to an EVA film and a preparation method thereof. The EVA film comprises the following components in mass percentage: 80-90% of ethylene-vinyl acetate copolymer, 1-2% of tert-butyl peroxybenzoate, 0.5-1% of 2-(3,4-epoxy cyclohexyl) ethyltrimethylsilane, 0.05-2% of 2,2'-methylene-di(4-ethyl-6-tert-butylphenol), 0.5-1% of tert-butyl peroxide 2-ethylhexyl carbonate, 1-3% of 3,5-di-tert-butyl-4-hydroxybenzoic acid hexadecyl ester, and the balance of an organic solvent. The EVA film for encapsulation of a solar battery has the advantages of high volume resistivity, high transmittance, and low yellowing rate, can increase the photoelectric conversion rate of a battery pack. The invention further provides a preparation method of the EVA film for encapsulation of the solar battery pack, and the method is simple in technology, convenient to operate, good in dispersion property, good in adhesion property, and high in stability.
Description
Technical field
The present invention relates to a kind of eva film and preparation method thereof, belong to technical field of organic chemistry.
Background technology
Under the situation of global warming, human ecological environment deterioration, conventional energy resources shortage, the strategy of sustainable development is accepted by countries in the world.Sun power has the advantages such as spatter property, security, resource abundance, is 21st century one of most important new forms of energy, is subject to attention and the support of national governments.Photovoltaic market sharply expanded in recent years, and supply falls short of demand for photovoltaic products.
Along with the development of photovoltaic module science and technology and some problems of discovery in using, namely assembly is for a long time under action of high voltage, make to there is leakage current between glass, packaged material, a large amount of accumulation is on cell piece surface, the passivation effect of battery surface is worsened, cause FF, Jsc, Voc to reduce, make assembly property lower than standard.In 2010, NREL and Solon confirmed the p-type crystal-silicon battery slice no matter which kind of technology assembly adopts, and assembly has the risk of PID under negative bias.In view of the raising that development and the photovoltaic plant of current photovoltaic industry science and technology require photovoltaic module, photovoltaic module manufacturing enterprise all adds tight requirement to product quality, using PID test passes as the qualified additional index of photovoltaic module.About causing PID to test the reason do not met the demands, now more consistent understanding is as follows: external cause: in high temperature, humidity and the serious corrosion of the photovoltaic module that causes due to photovoltaic DC-to-AC converter array ground mode and decline; Internal cause: system, assembly and cell piece three aspects all can cause PID phenomenon.
In assembly, the packaged material adopting performance good is one of approach preventing PID from occurring, and wherein the volume specific resistance of packaged material (being generally EVA adhesive film) wishes to be not less than 1 × 10
15Ω cm.External photovoltaic module is produced, and strict for various raw-material control, do not use defective starting material, therefore the PID of photovoltaic module can meet the demands substantially.Wherein EVA glue film for photovoltaic component is without particular requirement, and volume specific resistance is 1 × 10
14the EVA adhesive film of Ω cm can meet the demands, but the volume specific resistance of external a lot of EVA adhesive film all reaches 1 × 10
15Ω cm is even higher.According to the situation of domestic relative photo photovoltaic assembly manufacturing enterprise reflection, the photovoltaic module adopting Monocrystalline silicon cell piece to produce, adopts existing EVA adhesive film can meet PID test request.Adopt the photovoltaic module that polycrystalline silicon battery plate is produced, if when polycrystal silicon cell tablet quality is good, adopt existing EVA adhesive film also can meet PID test request, according to polycrystalline silicon battery plate more of poor quality, adopt existing EVA adhesive film can not meet PID test request, after PID test, the generated output of photovoltaic module reduces a lot, substantially exceeds the limit value of 5%.Make a general survey of domestic existing EVA adhesive film, volume specific resistance is all lower.
Summary of the invention
The technical problem that the present invention solves is: propose a kind of eva film, high volume specific resistance, high permeability, low xanthate ratio can be had, improve the photoelectric conversion rate of series of cells simultaneously, and a kind of technique is simple, easy to operate, and the preparation method of the eva film of the solar cell package that good dispersity, binding property are good, stability is high.
The technical scheme proposed to solve one of them technical problem above-mentioned is: ethylene-vinyl acetate base co-polymer 80 ~ 90%, peroxidized t-butyl perbenzoate 1 ~ 2%, 2-(3,4-epoxycyclohexyl) ethyl trimethyl silane 0.5 ~ 1%, 2,2 '-methylene radical-bis-(4-ethyl-6-tert.-butyl phenol) 0.05 ~ 2%, tert-butyl hydroperoxide 2-ethylhexyl carbonate 0.5 ~ 1%, 3,5-di-tert-butyl-4-hydroxybenzoic acid cetyl ester 1 ~ 3%, surplus is organic solvent;
In described ethylene-vinyl acetate base co-polymer, the massfraction of vinyl acetate is 29.4 ~ 29.7%;
Described peroxidized t-butyl perbenzoate is crosslinking and curing agent;
Described 2-(3,4-epoxycyclohexyl) ethyl trimethyl silane is silane coupling agent;
Described 2,2 '-methylene radical-bis-(4-ethyl-6-tert.-butyl phenol) is antioxidant;
Described tert-butyl hydroperoxide 2-ethylhexyl carbonate is crosslinking and curing agent;
Described 3,5-di-tert-butyl-4-hydroxybenzoic acid cetyl esters are uv-absorbing agent.
A kind of preferred technical scheme is: in described ethylene-vinyl acetate base co-polymer, the mass percent of vinyl acetate is 29.5%.
A kind of preferred technical scheme is: the mass percent of described peroxidized t-butyl perbenzoate is 1.6 ~ 1.8%.
A kind of preferred technical scheme is: the mass ratio of described 3,5-di-tert-butyl-4-hydroxybenzoic acid cetyl esters is 2%.
A kind of preferred technical scheme is: in order to make this eva film stability better, described organic solvent is propyl alcohol or Virahol.
The present invention is the technical scheme solving another technical problem above-mentioned proposition: a kind of preparation method of eva film, comprises the following steps:
A. prepare burden: take raw material, described eva film is made up of following according to mass percent: ethylene-vinyl acetate base co-polymer 80 ~ 90%, peroxidized t-butyl perbenzoate 1 ~ 2%, 2-(3,4-epoxycyclohexyl) ethyl trimethyl silane 0.5 ~ 1%, 2,2 '-methylene radical-bis-(4-ethyl-6-tert.-butyl phenol) 0.05 ~ 2%, tert-butyl hydroperoxide 2-ethylhexyl carbonate 0.5 ~ 1%, 3,5-di-tert-butyl-4-hydroxybenzoic acid cetyl ester 1 ~ 3%, surplus is organic solvent;
In described ethylene-vinyl acetate base co-polymer, the massfraction of vinyl acetate is 29.4 ~ 29.7%;
Described peroxidized t-butyl perbenzoate is crosslinking and curing agent;
Described 2-(3,4-epoxycyclohexyl) ethyl trimethyl silane is silane coupling agent;
Described 2,2 '-methylene radical-bis-(4-ethyl-6-tert.-butyl phenol) is antioxidant;
Described tert-butyl hydroperoxide 2-ethylhexyl carbonate is crosslinking and curing agent;
Described 3,5-di-tert-butyl-4-hydroxybenzoic acid cetyl esters are uv-absorbing agent.
B. mix: add ethylene-vinyl acetate base co-polymer, peroxidized t-butyl perbenzoate, 2-(3,4-epoxycyclohexyl) ethyl trimethyl silane, 2,2 '-methylene radical-bis-(4-ethyl-6-tert.-butyl phenol), tert-butyl hydroperoxide 2-ethylhexyl carbonate, 3,5-di-tert-butyl-4-hydroxybenzoic acid cetyl ester, organic solvent, fully mix;
C. extrude: pour step B gained mixture in double-screw extruding pelletizing machine mixing granulator, twin screw extruder is divided into three sections, i.e. entrance, interlude and outlet section, and its temperature is controlled as: 82 DEG C, 91 DEG C, 87 DEG C;
D. film forming: the particulate matter after granulation can obtain eva film through film-forming system.
A kind of preferred technical scheme is: in described ethylene-vinyl acetate base co-polymer, the mass percent of vinyl acetate is 29.5%.
A kind of preferred technical scheme is: the mass percent of described peroxidized t-butyl perbenzoate is 1.6 ~ 1.8%.
A kind of preferred technical scheme is: the mass ratio of described 3,5-di-tert-butyl-4-hydroxybenzoic acid cetyl esters is 2%.
A kind of preferred technical scheme is: in order to make this eva film stability better, described organic solvent is propyl alcohol or Virahol.
Beneficial effect of the present invention is as follows:
(1) comprising described 3,5-di-tert-butyl-4-hydroxybenzoic acid cetyl esters in eva film of the present invention is uv-absorbing agent, makes eva film have lower ultraviolet cut-on wavelength, increases the power stage of assembly, improves the photoelectric conversion rate of series of cells.
(2) in eva film of the present invention, in ethylene-vinyl acetate base co-polymer, the massfraction of vinyl acetate is 29 ~ 31%, if vinyl acetate content is few in raw material, then good heat resistance, but cohesiveness and low-temperature flexibility type poor; Vinyl acetate content is more, then there are good low temperature flexibility and cohesiveness, in traditional technology, the massfraction of vinyl acetate is generally 28 ~ 33%, but contriver is by repeatedly testing, find when in ethylene-vinyl acetate base co-polymer, the massfraction of vinyl acetate is 29.4 ~ 29.7%, the eva film of obtained solar cell package can obtain higher volume specific resistance, optimizes the anti-PID ability of eva film.
(3) eva film of the present invention selects appropriate peroxidized t-butyl perbenzoate to be crosslinking and curing agent; 2-(3,4-epoxycyclohexyl) ethyl trimethyl silane is silane coupling agent; 2,2 '-methylene radical-bis-(4-ethyl-6-tert.-butyl phenol) is antioxidant; Tert-butyl hydroperoxide 2-ethylhexyl carbonate is crosslinking and curing agent, can make that the good dispersity of the eva film of solar cell package, binding property are good, stability is high.
(4) preparation method of eva film of the present invention is first by ethylene-vinyl acetate base co-polymer, peroxidized t-butyl perbenzoate, 2-(3,4-epoxycyclohexyl) ethyl trimethyl silane, 2,2 '-methylene radical-bis-(4-ethyl-6-tert.-butyl phenol), tert-butyl hydroperoxide 2-ethylhexyl carbonate, 3,5-di-tert-butyl-4-hydroxybenzoic acid cetyl ester, organic solvent, fully mix; Pour gained mixture in double-screw extruding pelletizing machine mixing granulator, twin screw extruder is divided into three sections, i.e. entrance, interlude and outlet section, and its temperature is controlled as: 82 DEG C, 91 DEG C, 87 DEG C; Particulate matter after granulation can obtain solar cell through film-forming system and turn light EVA adhesive film.This preparation method's technique is simple, easy and simple to handle, and eva film good dispersity, the binding property of obtained solar cell package are good, stability is high.
Embodiment
Embodiment 1
The eva film of the present embodiment, configures according to following mass percent:
Ethylene-vinyl acetate base co-polymer 80%, peroxidized t-butyl perbenzoate 1%, 2-(3,4-epoxycyclohexyl) ethyl trimethyl silane 0.5%, 2,2 '-methylene radical-bis-(4-ethyl-6-tert.-butyl phenol) 0.05%, tert-butyl hydroperoxide 2-ethylhexyl carbonate 0.5%, 3,5-di-tert-butyl-4-hydroxybenzoic acid cetyl ester 1%, surplus is propyl alcohol;
In described ethylene-vinyl acetate base co-polymer, the massfraction of vinyl acetate is 29.4%;
Described peroxidized t-butyl perbenzoate is crosslinking and curing agent;
Described 2-(3,4-epoxycyclohexyl) ethyl trimethyl silane is silane coupling agent;
Described 2,2 '-methylene radical-bis-(4-ethyl-6-tert.-butyl phenol) is antioxidant;
Described tert-butyl hydroperoxide 2-ethylhexyl carbonate is crosslinking and curing agent;
Described 3,5-di-tert-butyl-4-hydroxybenzoic acid cetyl esters are uv-absorbing agent.
The preparation method of the eva film of the present embodiment, comprises following concrete steps:
A. prepare burden: take appropriate ethylene-vinyl acetate base co-polymer according to above-mentioned formula consumption, peroxidized t-butyl perbenzoate, 2-(3,4-epoxycyclohexyl) ethyl trimethyl silane, 2,2 '-methylene radical-bis-(4-ethyl-6-tert.-butyl phenol), tert-butyl hydroperoxide 2-ethylhexyl carbonate, 3,5-di-tert-butyl-4-hydroxybenzoic acid cetyl ester, surplus is propyl alcohol;
In described ethylene-vinyl acetate base co-polymer, the massfraction of vinyl acetate is 29.4%;
Described peroxidized t-butyl perbenzoate is crosslinking and curing agent;
Described 2-(3,4-epoxycyclohexyl) ethyl trimethyl silane is silane coupling agent;
Described 2,2 '-methylene radical-bis-(4-ethyl-6-tert.-butyl phenol) is antioxidant;
Described tert-butyl hydroperoxide 2-ethylhexyl carbonate is crosslinking and curing agent;
Described 3,5-di-tert-butyl-4-hydroxybenzoic acid cetyl esters are uv-absorbing agent.
B. mix: add ethylene-vinyl acetate base co-polymer, peroxidized t-butyl perbenzoate, 2-(3,4-epoxycyclohexyl) ethyl trimethyl silane, 2,2 '-methylene radical-bis-(4-ethyl-6-tert.-butyl phenol), tert-butyl hydroperoxide 2-ethylhexyl carbonate, 3,5-di-tert-butyl-4-hydroxybenzoic acid cetyl ester, propyl alcohol, fully mix;
C. extrude: pour step B gained mixture in double-screw extruding pelletizing machine mixing granulator, twin screw extruder is divided into three sections, i.e. entrance, interlude and outlet section, and its temperature is controlled as: 82 DEG C, 91 DEG C, 87 DEG C;
D. film forming: the particulate matter after granulation can obtain eva film through film-forming system.
Embodiment 2
The rest part of the eva film of the present embodiment is identical with embodiment 1, and difference is:
The present embodiment eva film, composed of the following components:
Ethylene-vinyl acetate base co-polymer 90%, peroxidized t-butyl perbenzoate 2%, 2-(3,4-epoxycyclohexyl) ethyl trimethyl silane 1%, 2,2 '-methylene radical-bis-(4-ethyl-6-tert.-butyl phenol) 2%, tert-butyl hydroperoxide 2-ethylhexyl carbonate 1%, 3,5-di-tert-butyl-4-hydroxybenzoic acid cetyl ester 3%, surplus is Virahol;
In described ethylene-vinyl acetate base co-polymer, the massfraction of vinyl acetate is 29.7%;
Embodiment 3
The rest part of the eva film of the present embodiment is identical with embodiment 1, and difference is:
The present embodiment eva film, composed of the following components:
Ethylene-vinyl acetate base co-polymer 89%, peroxidized t-butyl perbenzoate 1.8%, 2-(3,4-epoxycyclohexyl) ethyl trimethyl silane 0.9%, 2,2 '-methylene radical-bis-(4-ethyl-6-tert.-butyl phenol) 2%, tert-butyl hydroperoxide 2-ethylhexyl carbonate 1%, 3,5-di-tert-butyl-4-hydroxybenzoic acid cetyl ester 2%, surplus is Virahol;
In described ethylene-vinyl acetate base co-polymer, the massfraction of vinyl acetate is 29.5%;
Embodiment 4
The rest part of the eva film of the present embodiment is identical with embodiment 1, and difference is:
The present embodiment eva film, composed of the following components:
Ethylene-vinyl acetate base co-polymer 88%, peroxidized t-butyl perbenzoate 1.7%, 2-(3,4-epoxycyclohexyl) ethyl trimethyl silane 0.7%, 2,2 '-methylene radical-bis-(4-ethyl-6-tert.-butyl phenol) 1.8%, tert-butyl hydroperoxide 2-ethylhexyl carbonate 0.9%, 3,5-di-tert-butyl-4-hydroxybenzoic acid cetyl ester 2.5%, surplus is propyl alcohol;
In described ethylene-vinyl acetate base co-polymer, the massfraction of vinyl acetate is 29.5%;
Embodiment 5
The rest part of the eva film of the present embodiment is identical with embodiment 1, and difference is:
The present embodiment eva film, composed of the following components:
Ethylene-vinyl acetate base co-polymer 85%, peroxidized t-butyl perbenzoate 1.5%, 2-(3,4-epoxycyclohexyl) ethyl trimethyl silane 0.8%, 2,2 '-methylene radical-bis-(4-ethyl-6-tert.-butyl phenol) 1.5%, tert-butyl hydroperoxide 2-ethylhexyl carbonate 0.7%, 3,5-di-tert-butyl-4-hydroxybenzoic acid cetyl ester 2%, surplus is Virahol;
In described ethylene-vinyl acetate base co-polymer, the massfraction of vinyl acetate is 29.6%;
The concrete technical scheme be not limited to described in above-described embodiment of the present invention, all employings are equal to replaces the protection domain that the technical scheme formed is application claims.
(comparative example 1)
The present embodiment eva film, composed of the following components:
Ethylene-vinyl acetate base co-polymer 85%, peroxidized t-butyl perbenzoate 1.5%, 2-(3,4-epoxycyclohexyl) ethyl trimethyl silane 0.8%, 2,2 '-methylene radical-bis-(4-ethyl-6-tert.-butyl phenol) 1.5%, tert-butyl hydroperoxide 2-ethylhexyl carbonate 0.7%, surplus is Virahol;
In described ethylene-vinyl acetate base co-polymer, the massfraction of vinyl acetate is 28%.
The preparation method of the eva film of the present embodiment is identical with embodiment 1.
(comparative example 2)
The present embodiment eva film, composed of the following components:
Ethylene-vinyl acetate base co-polymer 85%, peroxidized t-butyl perbenzoate 1.5%, 2-(3,4-epoxycyclohexyl) ethyl trimethyl silane 0.8%, 2,2 '-methylene radical-bis-(4-ethyl-6-tert.-butyl phenol) 1.5%, tert-butyl hydroperoxide 2-ethylhexyl carbonate 0.7%, surplus is Virahol;
In described ethylene-vinyl acetate base co-polymer, the massfraction of vinyl acetate is 33%.
The preparation method of the eva film of the present embodiment is identical with embodiment 1.
(comparative example 3)
The present embodiment eva film, composed of the following components:
Ethylene-vinyl acetate base co-polymer 85%, peroxidized t-butyl perbenzoate 1.5%, 2-(3,4-epoxycyclohexyl) ethyl trimethyl silane 0.8%, 2,2 '-methylene radical-bis-(4-ethyl-6-tert.-butyl phenol) 1.5%, tert-butyl hydroperoxide 2-ethylhexyl carbonate 0.7%, surplus is Virahol;
In described ethylene-vinyl acetate base co-polymer, the massfraction of vinyl acetate is 33%.
The preparation method of the eva film of the present embodiment is identical with embodiment 1.
The property indices of the eva film of the various embodiments described above and comparative example is measured by the following method:
1, resistance to ultraviolet(ray) radiation energy
Test sample book is the glued membrane multi-disc of 0.5mm.Uv-radiation ageing testing method is International Electrotechnical Commission IEC61345 standard, and test condition is: temperature 60 ± 5 DEG C, wavelength 200 ~ 400nm, irradiation intensity 15KWh/m2.Determination of light transmittance presses GB/T2410 standard, its printing opacity conservation rate=(sample mean transmittance after irradiation/pre-irradiation sample mean transmittance) × 100%.Yellowness index is analyzed according to GB2409-80.
2, wet and heat ageing resistant performance
Wet and heat ageing resistant testing method presses GB/T2423.3 standard, and test condition is: temperature 85 DEG C, relative humidity 85%, time 2000h.Determination of light transmittance presses GB/T2410 standard, its printing opacity conservation rate=(sample mean transmittance after irradiation/pre-irradiation sample mean transmittance) × 100%.Yellowness index is analyzed according to GB2409-80.
Above-mentioned test result is as shown in the table:
The test-results of the sample of each embodiment of table 1 and comparative example
It is known that comparative example and each embodiment carry out contrast, and when in ethylene-vinyl acetate base co-polymer, the massfraction of vinyl acetate is 28% or 33%, the volume specific resistance of the eva film of solar cell package is 1.61 × 10
14Ω cm
-1, compared with each embodiment, the requirement of the volume specific resistance of higher eva film can not be met; And when in embodiment employing ethylene-vinyl acetate base co-polymer, the massfraction of vinyl acetate is 29.4 ~ 29.7%, the volume specific resistance of the eva film of solar cell package is 1.21 × 10
15Ω cm
-1, the volume specific resistance of higher eva film can be met.
It is known that comparative example and each embodiment carry out contrast, select appropriate 3, 5-di-tert-butyl-4-hydroxybenzoic acid cetyl ester is uv-absorbing agent, peroxidized t-butyl perbenzoate is crosslinking and curing agent, 2-(3, 4-epoxycyclohexyl) ethyl trimethyl silane is silane coupling agent, 2, 2 '-methylene radical-bis-(4-ethyl-6-tert.-butyl phenol) is antioxidant, tert-butyl hydroperoxide 2-ethylhexyl carbonate is crosslinking and curing agent, the printing opacity conservation rate of gained embodiment 1 to 5, the stripping strength result of photoelectric conversion rate and glass thereof is obviously better than comparative example, show the superiority of formula.
Eva film of the present invention and preparation method thereof is not limited to the various embodiments described above, and above-described embodiment is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And these belong to spirit institute's apparent change of extending out of the present invention or change and are still among protection scope of the present invention.
Claims (10)
1. an eva film, is characterized in that: composed of the following components according to mass percent:
Ethylene-vinyl acetate base co-polymer 80 ~ 90%, peroxidized t-butyl perbenzoate 1 ~ 2%, 2-(3,4-epoxycyclohexyl) ethyl trimethyl silane 0.5 ~ 1%, 2,2 '-methylene radical-bis-(4-ethyl-6-tert.-butyl phenol) 0.05 ~ 2%, tert-butyl hydroperoxide 2-ethylhexyl carbonate 0.5 ~ 1%, 3,5-di-tert-butyl-4-hydroxybenzoic acid cetyl ester 1 ~ 3%, surplus is organic solvent;
In described ethylene-vinyl acetate base co-polymer, the massfraction of vinyl acetate is 29.4 ~ 29.7%;
Described peroxidized t-butyl perbenzoate is crosslinking and curing agent;
Described 2-(3,4-epoxycyclohexyl) ethyl trimethyl silane is silane coupling agent;
Described 2,2 '-methylene radical-bis-(4-ethyl-6-tert.-butyl phenol) is antioxidant;
Described tert-butyl hydroperoxide 2-ethylhexyl carbonate is crosslinking and curing agent;
Described 3,5-di-tert-butyl-4-hydroxybenzoic acid cetyl esters are uv-absorbing agent.
2. eva film according to claim 1, is characterized in that: in described ethylene-vinyl acetate base co-polymer, the mass percent of vinyl acetate is 29.5%.
3. eva film according to claim 1, is characterized in that: the mass percent of described peroxidized t-butyl perbenzoate is 1.6 ~ 1.8%.
4. eva film according to claim 1, is characterized in that: the mass ratio of described 3,5-di-tert-butyl-4-hydroxybenzoic acid cetyl esters is 2%.
5. eva film according to claim 1, is characterized in that: described organic solvent is propyl alcohol or Virahol.
6. a preparation method for eva film, is characterized in that: comprise the following steps:
A. prepare burden: take raw material, described eva film is made up of following according to mass percent: ethylene-vinyl acetate base co-polymer 80 ~ 90%, peroxidized t-butyl perbenzoate 1 ~ 2%, 2-(3,4-epoxycyclohexyl) ethyl trimethyl silane 0.5 ~ 1%, 2,2 '-methylene radical-bis-(4-ethyl-6-tert.-butyl phenol) 0.05 ~ 2%, tert-butyl hydroperoxide 2-ethylhexyl carbonate 0.5 ~ 1%, 3,5-di-tert-butyl-4-hydroxybenzoic acid cetyl ester 1 ~ 3%, surplus is organic solvent;
In described ethylene-vinyl acetate base co-polymer, the massfraction of vinyl acetate is 29.4 ~ 29.7%;
Described peroxidized t-butyl perbenzoate is crosslinking and curing agent;
Described 2-(3,4-epoxycyclohexyl) ethyl trimethyl silane is silane coupling agent;
Described 2,2 '-methylene radical-bis-(4-ethyl-6-tert.-butyl phenol) is antioxidant;
Described tert-butyl hydroperoxide 2-ethylhexyl carbonate is crosslinking and curing agent;
Described 3,5-di-tert-butyl-4-hydroxybenzoic acid cetyl esters are uv-absorbing agent;
B. mix: add ethylene-vinyl acetate base co-polymer, peroxidized t-butyl perbenzoate, 2-(3,4-epoxycyclohexyl) ethyl trimethyl silane, 2,2 '-methylene radical-bis-(4-ethyl-6-tert.-butyl phenol), tert-butyl hydroperoxide 2-ethylhexyl carbonate, 3,5-di-tert-butyl-4-hydroxybenzoic acid cetyl ester, organic solvent, fully mix;
C. extrude: pour step B gained mixture in double-screw extruding pelletizing machine mixing granulator, twin screw extruder is divided into three sections, i.e. entrance, interlude and outlet section, and its temperature is controlled as: 82 DEG C, 91 DEG C, 87 DEG C;
D. film forming: the particulate matter after granulation can obtain eva film through film-forming system.
7. the preparation method of eva film according to claim 6, is characterized in that: in described ethylene-vinyl acetate base co-polymer, the mass percent of vinyl acetate is 29.5%.
8. the preparation method of eva film according to claim 6, is characterized in that: the mass percent of described peroxidized t-butyl perbenzoate is 1.6 ~ 1.8%.
9. the preparation method of eva film according to claim 6, is characterized in that: the mass ratio of described 3,5-di-tert-butyl-4-hydroxybenzoic acid cetyl esters is 2%.
10. the preparation method of eva film according to claim 6, is characterized in that: described organic solvent is propyl alcohol or Virahol.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101353558A (en) * | 2008-09-04 | 2009-01-28 | 杭州福斯特热熔胶膜有限公司 | Novel EVA adhesive film |
| CN102504714A (en) * | 2011-11-29 | 2012-06-20 | 浙江帝龙光电材料有限公司 | Solar cell packaging glue film |
| KR20120075000A (en) * | 2010-12-28 | 2012-07-06 | 호남석유화학 주식회사 | Resin compositions for encapsulant material of photovoltaic modules including metal nano powder |
| CN102559079A (en) * | 2012-01-09 | 2012-07-11 | 苏州泰科尼光伏材料有限公司 | Ethylene vinyl acetate (EVA) glue film for encapsulating solar battery |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101353558A (en) * | 2008-09-04 | 2009-01-28 | 杭州福斯特热熔胶膜有限公司 | Novel EVA adhesive film |
| KR20120075000A (en) * | 2010-12-28 | 2012-07-06 | 호남석유화학 주식회사 | Resin compositions for encapsulant material of photovoltaic modules including metal nano powder |
| CN102504714A (en) * | 2011-11-29 | 2012-06-20 | 浙江帝龙光电材料有限公司 | Solar cell packaging glue film |
| CN102559079A (en) * | 2012-01-09 | 2012-07-11 | 苏州泰科尼光伏材料有限公司 | Ethylene vinyl acetate (EVA) glue film for encapsulating solar battery |
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