CN108329586A - A kind of three-decker water vapor rejection film and preparation method thereof - Google Patents
A kind of three-decker water vapor rejection film and preparation method thereof Download PDFInfo
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Abstract
The present invention provides a kind of three-decker water vapor rejection films and preparation method thereof.The three-decker water vapor rejection film of the present invention, the three-decker water vapor rejection film includes intermediate core layer, and it is respectively arranged at the polyethylene terephthalate layer of the both sides up and down of the intermediate core layer, the intermediate core layer is prepared by the blend of polyester, polyolefin and compatilizer.The preparation method of the present invention, simple for process, polyester and polyolefin blend can improve the heat resistance and mechanical performance of intermediate core layer, while can improve the cementability with pet layer；While acting on the compatibility for improving polyester and polyolefin of compatilizer, improve the cementability of intermediate core layer and pet layer, three-decker water vapor rejection film obtained, the water vapor barrier property having had and good thermal stability and mechanical performance, can substitute the PET base material in existing back veneer material.
Description
Technical field
The invention belongs to photovoltaic equipment Backplane Production Technology field, it is related to a kind of three-decker water vapor rejection film and its preparation
Method.
Background technology
In field of solar energy, solar energy backboard is located at the outermost layer of module backside, plays protection to cell piece and support is made
With.Backboard should have reliable electric insulating quality, water vapor barrier property and good resistance to ag(e)ing in general.In order to make solar energy
Battery keeps best working condition and maintains 25 years service life, and excellent water vapor barrier property becomes that weigh backboard performance good
One of bad important indicator.If solar energy backboard water vapor barrier property is bad, steam is penetrated by backboard inside encapsulation system
The cementability that can influence packaging adhesive film causes backboard and packaging adhesive film delamination, makes cell piece by oxidation to seriously reduce battery
The service life of piece generating efficiency and component.
Currently, it is three-decker (PVDF/PET/PVDF), outer protective layer that the backboard occurred in photovoltaic market, which generally has,
Kynoar (PVDF) film layer has good environment resistant erosiveness, and middle layer is polyethylene terephthalate
(PET) there is film layer good insulation performance, internal layer PVDF and EVA to have good adhesive property.The kind analogy of photovoltaic back
More, different manufacturers, different structure have different naming methods, such as：TPT、TPE、KPK、KPE、AAA、PET、PPE、
FPF, FPE etc. different backboard titles.Wherein：T is polyvinyl fluoride (PVF) film for referring to E.I.Du Pont Company, trade name
Tedlar；K refers to the entitled K of PVDF patent and trademarks (Kynar) of Arkma companies production；P is to refer to PET film-poly terephthalic acid second
Terephthalate films (skeleton of backboard)；E is to refer to EVA (VA contents are relatively low) or polyolefin PO；A is modified polyamide (abbreviation
PA, Nylon) Isovolta exploitation have AAA fabric backplanes；F is to refer to fluorocarbon coating：PTFE (polytetrafluoroethylene (PTFE)) coating；PVDF is (poly-
Vinylidene) coating；The copolymer of FEVE vinyl fluoride and vinyl ethers.Certainly many coating type backboard producers are in order to emphasize oneself
Product it is high-quality, also call oneself F be " T ".
The characteristics of according to commercially available backboard, in the case where not influencing the performance of existing backboard, PET remains best backboard
The base material of preparation, and the most important thing that the block-water performance for improving PET, which is backboard, to be used, so how to further increase PET's
Water-resisting ability is an important research content.
Invention content
In view of the deficiencies of the prior art, one of the objects of the present invention is to provide a kind of three-decker water vapor rejection film, tools
There are preferable water vapor barrier property and good thermal stability and mechanical performance, the PET in existing back veneer material can be substituted
Base material.
For this purpose, the present invention uses following technical scheme：
A kind of three-decker water vapor rejection film, the three-decker water vapor rejection film includes intermediate core layer, and is set respectively
It is placed in the polyethylene terephthalate layer of the both sides up and down of the intermediate core layer, the intermediate core layer is by polyester, polyolefin
It is prepared with the blend of compatilizer.
The intermediate core layer by weight percentage, by following material composition：
Polyester 10~30%
Polyolefin 65~85%
Compatilizer 1~10%.
Wherein, the intermediate core layer by weight percentage, by following material composition：
Polyester 10~30%, for example, polyolefin weight percent be 10%, 11%, 12%, 13%, 14%, 15%,
16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%.
Polyolefin 65~85%, for example, polyolefin weight percent be 65%, 66%, 67%, 68%, 69%, 70%,
71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%.
Compatilizer 1~10%, for example, polyolefin weight percent be 1%, 2%, 3%, 4%, 5%, 6%, 7%,
8%, 9%, 10%.
Wherein, the polyester is polyethylene terephthalate, Isosorbide-5-Nitrae cyclohexanedimethanol polyester, poly terephthalic acid
Butanediol ester, poly- 2,6- (ethylene naphthalate)s and one kind in polypropylene terephthalate or at least two mixing
Object.The mixture it is typical but unrestricted be combined as polyethylene terephthalate, 1,4 cyclohexanedimethanol polyester it is mixed
Close object, polyethylene terephthalate, polybutylene terephthalate (PBT) mixture, polyethylene terephthalate,
The mixture of poly- 2,6-naphthalenedicarboxylic acid glycol ester, polyethylene terephthalate, polypropylene terephthalate it is mixed
Close object, polyethylene terephthalate, Isosorbide-5-Nitrae cyclohexanedimethanol polyester, polybutylene terephthalate (PBT) mixture, gather
The mixture of ethylene glycol terephthalate, Isosorbide-5-Nitrae cyclohexanedimethanol polyester, poly- 2,6-naphthalenedicarboxylic acid glycol ester gathers to benzene
The mixture of naphthalate, Isosorbide-5-Nitrae cyclohexanedimethanol polyester, polypropylene terephthalate, poly terephthalic acid
The mixture of glycol ester, polybutylene terephthalate (PBT), poly- 2,6-naphthalenedicarboxylic acid glycol ester, poly terephthalic acid second two
The mixture of alcohol ester, polybutylene terephthalate (PBT), polypropylene terephthalate, polyethylene terephthalate,
The mixture of poly- 2,6-naphthalenedicarboxylic acid glycol ester and polypropylene terephthalate, polyethylene terephthalate, Isosorbide-5-Nitrae
The mixture of cyclohexanedimethanol polyester, polybutylene terephthalate (PBT), poly- 2,6-naphthalenedicarboxylic acid glycol ester gathers to benzene two
Formic acid glycol ester, 1,4 cyclohexanedimethanol polyester, polybutylene terephthalate (PBT), polypropylene terephthalate
Mixture, Isosorbide-5-Nitrae cyclohexanedimethanol polyester, polybutylene terephthalate (PBT), poly- 2,6-naphthalenedicarboxylic acid glycol ester and poly- pair
The mixture of benzene dicarboxylic acid trimethylene glycol ester, polyethylene terephthalate, Isosorbide-5-Nitrae cyclohexanedimethanol polyester, poly- terephthaldehyde
The mixture of sour butanediol ester, poly- 2,6- (ethylene naphthalate)s and polypropylene terephthalate.
Wherein, the polyolefin is one kind or at least in polyethylene, polypropylene, ethylene-propylene copolymer and cycloolefin
Two kinds of mixture.The mixture it is typical but unrestricted be combined as polyethylene, polyacrylic mixture, polyethylene, ethylene-
The mixture of propylene copolymer, polyethylene, cycloolefin mixture, polypropylene, ethylene-propylene copolymer mixture, poly- third
The mixture of the mixture of alkene, cycloolefin, ethylene-propylene copolymer and cycloolefin, polyethylene, polypropylene, ethylene-propylene copolymer
The mixture of object, polyethylene, polypropylene, cycloolefin mixture, the mixing of polypropylene, ethylene-propylene copolymer and cycloolefin
Object, polyethylene, polypropylene, ethylene-propylene copolymer and cycloolefin mixture.
In addition to this, the polyolefin can also be the mixture and polyolefin bullet of above-mentioned single polyolefin or polyolefin
The mixture of property body.Such as the mixture of polyethylene and polyolefin elastomer, the mixture of polypropylene and polyolefin elastomer, second
The mixture or polyethylene of the mixture of alkene-propylene copolymer and polyolefin elastomer, cycloolefin and polyolefin elastomer,
The mixture of at least two mixtures and polyolefin elastomer, differs herein in polypropylene, ethylene-propylene copolymer and cycloolefin
One enumerates.
Wherein, the compatilizer is polyethylene-g- maleic anhydrides, polypropylene-g- maleic anhydrides, ethylene-propylene copolymer-
G- maleic anhydrides, polyethylene-g- glycidyl methacrylate, polypropylene-g- glycidyl methacrylate, ethylene-
Propylene copolymer-g- glycidyl methacrylate, polyolefin elastomer-g- maleic anhydrides, the Malaysias bibasic ethylene propylene rubber-g-
Acid anhydrides, ethylene propylene diene rubber-g- maleic anhydrides, ethylene-ethyl acetate copolymer-g- maleic anhydrides, ethylene-methyl acrylate
Copolymer-g- maleic anhydrides, vinyl-acrylate copolymer-g- maleic anhydrides, butadiene-styrene rubber-g- maleic anhydrides, polyphenyl second
Alkene-polyethylene-polybutene-polystyrene-g- maleic anhydrides, polystyrene-poly butylene-polystyrene-g- maleic anhydrides, polyene
Olefin elastomer-g- glycidyl methacrylate, bibasic ethylene propylene rubber-g- glycidyl methacrylate, EPDM
Rubber-g- glycidyl methacrylate, ethylene-ethyl acetate copolymer-g- glycidyl methacrylate, ethylene-
Methacrylate copolymer-g- glycidyl methacrylate, the contracting of vinyl-acrylate copolymer-g- methacrylic acids
Water glyceride, butadiene-styrene rubber-g- glycidyl methacrylate, Polystyrene-Polyethylene-polybutene-polystyrene-g- first
Base glycidyl acrylate and one kind in polystyrene-poly butylene-polystyrene-g- glycidyl methacrylate or
At least two mixture.
In the present invention, the thickness of the intermediate core layer is 50~250 μm, for example, the thickness of intermediate core layer is 50 μm, 60 μm,
70μm、80μm、90μm、100μm、110μm、120μm、130μm、140μm、150μm、160μm、170μm、180μm、190μm、
200μm、210μm、220μm、230μm、240μm、250μm。
Preferably, the thickness of the polyethylene terephthalate layer is 25~50 μm, i.e., each strata terephthaldehyde
The thickness of sour ethylene glycol ester layer is 25~50 μm, such as the thickness of polyethylene terephthalate layer is 25 μm, 26 μm, 27 μ
m、28μm、29μm、30μm、31μm、32μm、33μm、34μm、35μm、36μm、37μm、38μm、39μm、40μm、41μm、42μm、
43μm、44μm、45μm、46μm、47μm、48μm、49μm、50μm。
The long-term heat resistance humidity index of three-decker water vapor rejection film of the present invention is not less than 105 DEG C.
The second object of the present invention is to provide a kind of preparation method of three-decker water vapor rejection film, the preparation method
Include the following steps：
1) blend is obtained after being blended as raw material using polyester, polyolefin and compatilizer；
2) blend is obtained as the material of intermediate core layer using step 1), is spread respectively in the both sides up and down of the intermediate core layer
If pet material, the three-decker water vapor rejection film is obtained after extruded, film forming.
The mode of the film forming is one kind in biaxial tension film forming, simple tension film forming and casting film-forming.
As the preferred embodiment of the present invention, the preparation method of three-decker water vapor rejection film includes the following steps：
1) by weight percentage, weigh 10~30% polyester, 65~85% polyolefin and 1~10% it is compatible
Agent obtains blend after blending；
2) blend is obtained as the material of intermediate core layer using step 1), is spread respectively in the both sides up and down of the intermediate core layer
If pet material, the three-decker water vapor rejection film is obtained after extruded, film forming.
Compared with prior art, beneficial effects of the present invention are：
(1) three-decker water vapor rejection film of the invention, upper layer and lower layer are polyethylene terephthalate layer (PET
Layer), elemental composition and the structure feature for maintaining surface to greatest extent are consistent with traditional PET material, do not have to change existing work
Skill can be carried out surface coating process or surface laminating process；Main component is polyolefin in intermediate core layer structure, thus
The performance of the barrier steam of existing PET material can be significantly increased；And polyester and polyolefin blend, intermediate core can be improved
The heat resistance and mechanical performance of layer, while the cementability with pet layer can be improved；Acting on for compatilizer improves polyester and polyene
While the compatibility of hydrocarbon, improve the cementability of intermediate core layer and pet layer, wherein longitudinal (MD) tensile strength 38Mpa with
On, laterally (TD) tensile strength is in 32Mpa or more, and longitudinal fracture extensibility is up to 210%, and transverse breakage extensibility is up to
180%, minimum water vapor transmittance is 0.9g/m2Day, longitudinal percent thermal shrinkage minimum 0.03%, lateral percent thermal shrinkage is minimum
It is 0.09%, long-term heat resistance humidity index (TI) >=105 DEG C.
(2) preparation method of three-decker water vapor rejection film of the invention, simple for process, three-decker steam resistance obtained
Diaphragm has very high water vapor barrier property and good thermal stability and mechanical performance, can substitute existing photovoltaic back field
In back veneer material PET base material.
Specific implementation mode
The technical solution further illustrated the present invention below by specific implementation mode.
Unless specific instructions, various raw materials of the invention are commercially available buys, or is prepared according to the conventional method of this field
It obtains.
The three-decker water vapor rejection film of the present invention, three-decker water vapor rejection film includes intermediate core layer, and is set respectively
It is placed in the polyethylene terephthalate layer of the both sides up and down of intermediate core layer, intermediate core layer is by polyester, polyolefin and compatilizer
Blend be prepared.
The preparation method of the three-decker water vapor rejection film of the present invention, preparation method include the following steps：
1) blend is obtained after being blended as raw material using polyester, polyolefin and compatilizer；
2) blend is obtained as the material of intermediate core layer using step 1), is laid with respectively in the both sides up and down of intermediate core layer poly-
Ethylene glycol terephthalate material, it is extruded, film forming after obtain three-decker water vapor rejection film.
It is hindered with high steam below by embodiment to verify the three-decker water vapor rejection film of preparation of the embodiment of the present invention
Every property, good thermal stability and mechanical performance.
Three-decker water vapor rejection film obstructs the ability of steam, is determined by steam penetrating capacity experiment, and test water steams
Instrument used in gas transit dose is U.S. MOCON moisture-inhibiting instrument.Wherein, steam penetrating capacity is lower, illustrates water vapor rejection energy
Power is stronger；Steam penetrating capacity is higher, illustrates that water vapor rejection ability is weaker.
The thermal stability of three-decker water vapor rejection film is weighed by testing the percent thermal shrinkage in the directions MD and TD, is surveyed
It is Nikon Quadratic Finite Element that examination, which is heat-shrinked used instrument,.Wherein, shrinking percentage is smaller, illustrates that thermal stability is better.
The mechanical performance of three-decker water vapor rejection film is carried out by the directions MD and TD tensile strength and fracture stretch rate
It weighs, instrument is electronic universal tester AGS-X Shimadzus used in test mechanical performance.Wherein, tensile strength and fracture
Stretch rate is bigger, illustrates that the mechanical performance of film is better.
Embodiment 1
The proportioning of the intermediate core layer of the present embodiment is polyethylene terephthalate 100g, polypropylene 850g, polyethylene-
G- maleic anhydride 50g, by biaxial tension at film preparation three-decker water vapor rejection film.Wherein, levels poly terephthalic acid
The thickness of ethylene glycol ester layer is 25 μm, and the thickness of intermediate core layer is 150 μm.
Embodiment 2
The proportioning of the intermediate core layer of the present embodiment is polybutylene terephthalate (PBT) 300g, polyethylene 690g, polypropylene-
G- maleic anhydride 10g, by simple tension at film preparation three-decker water vapor rejection film.Wherein, levels poly terephthalic acid
The thickness of ethylene glycol ester layer is 25 μm, and the thickness of intermediate core layer is 250 μm.
Embodiment 3
The proportioning of the intermediate core layer of the present embodiment is polypropylene terephthalate 250g, ethylene-propylene copolymer
650g, vinyl-acrylate copolymer-g- glycidyl methacrylate 100g, three-decker is prepared by casting film-forming
Water vapor rejection film.Wherein, the thickness of levels polyethylene terephthalate layer is 50 μm, and the thickness of intermediate core layer is 50
μm。
Embodiment 4
The proportioning of the intermediate core layer of the present embodiment is poly- 2,6-naphthalenedicarboxylic acid glycol ester 150g, cycloolefin 800g, polyphenyl
Ethylene-propylene-polybutene-polystyrene-g- maleic anhydride 50g is hindered by biaxial tension at film preparation three-decker steam
Diaphragm.Wherein, the thickness of levels polyethylene terephthalate layer is 25 μm, and the thickness of intermediate core layer is 200 μm.
Embodiment 5
The proportioning of the intermediate core layer of the present embodiment is Isosorbide-5-Nitrae cyclohexanedimethanol polyester 200g, polypropylene 750g, polyolefin bullet
Property body-g- glycidyl methacrylate 50g, pass through casting film-forming prepare three-decker water vapor rejection film.Wherein, levels
The thickness of polyethylene terephthalate layer is 35 μm, and the thickness of intermediate core layer is 150 μm.
Comparative example
The PET film that thickness is 150 μm is prepared by biaxial tension method.
Table 1
Compared with PET film made from comparative example, three-decker water vapor rejection film produced by the present invention is having steam resistance
Every ability under, also there is good thermal stability and mechanical performance, wherein longitudinal (MD) tensile strength is horizontal in 38Mpa or more
To (TD) tensile strength in 32Mpa or more, longitudinal fracture extensibility is up to 210%, and transverse breakage extensibility is up to
180%, minimum water vapor transmittance is 0.9g/m2Day, longitudinal percent thermal shrinkage minimum 0.03%, lateral percent thermal shrinkage is minimum
It is 0.09%, long-term heat resistance humidity index (TI) >=105 DEG C.
The present invention illustrates detailed process equipment and the technological process of the present invention by above-described embodiment, but the present invention is not
It is confined to above-mentioned detailed process equipment and technological process, that is, does not mean that the present invention has to rely on above-mentioned detailed process equipment and work
Skill flow could be implemented.Person of ordinary skill in the field is it will be clearly understood that any improvement in the present invention, to product of the present invention
The equivalence replacement of each raw material and the addition of auxiliary element, the selection of concrete mode etc., all fall within protection scope of the present invention and public affairs
Within the scope of opening.
Claims (10)
1. a kind of three-decker water vapor rejection film, which is characterized in that the three-decker water vapor rejection film includes intermediate core layer, with
And it is respectively arranged at the polyethylene terephthalate layer of the both sides up and down of the intermediate core layer, the intermediate core layer is by gathering
The blend of ester, polyolefin and compatilizer is prepared.
2. three-decker water vapor rejection film according to claim 1, which is characterized in that intermediate core layer percentage by weight
Than meter, by following material composition：
Polyester 10~30%
Polyolefin 65~85%
Compatilizer 1~10%.
3. three-decker water vapor rejection film according to claim 1 or 2, which is characterized in that the polyester is poly- to benzene two
Formic acid glycol ester, 1,4 cyclohexanedimethanol polyester, polybutylene terephthalate (PBT), poly- 2,6- (ethylene naphthalate)s
With in polypropylene terephthalate one kind or at least two mixture.
4. the three-decker water vapor rejection film according to one of claim 1-3, which is characterized in that the polyolefin is poly- second
One kind in alkene, polypropylene, ethylene-propylene copolymer and cycloolefin or at least two mixture.
5. the three-decker water vapor rejection film according to one of claim 1-4, which is characterized in that the compatilizer is poly- second
Alkene-g- maleic anhydrides, polypropylene-g- maleic anhydrides, ethylene-propylene copolymer-g- maleic anhydrides, polyethylene-g- metering systems
Acid glycidyl ester, polypropylene-g- glycidyl methacrylate, ethylene-propylene copolymer-g- Glycidyl methacrylates are sweet
Grease, polyolefin elastomer-g- maleic anhydrides, bibasic ethylene propylene rubber-g- maleic anhydrides, ethylene propylene diene rubber-g- maleic anhydrides,
Ethylene-ethyl acetate copolymer-g- maleic anhydrides, ethylene-methyl acrylate copolymer-g- maleic anhydrides, ethylene-acrylic acid
Ester copolymer-g- maleic anhydrides, butadiene-styrene rubber-g- maleic anhydrides, Polystyrene-Polyethylene-polybutene-polystyrene-g- horses
Come acid anhydrides, polystyrene-poly butylene-polystyrene-g- maleic anhydrides, polyolefin elastomer-g- methyl propenoic acid glycidyls
Ester, bibasic ethylene propylene rubber-g- glycidyl methacrylate, ethylene propylene diene rubber-g- glycidyl methacrylate, second
Alkene-acetate copolymer-g- glycidyl methacrylate, ethylene-methyl acrylate copolymer-g- methacrylic acids
Ethylene oxidic ester, vinyl-acrylate copolymer-g- glycidyl methacrylate, the contracting of butadiene-styrene rubber-g- methacrylic acids
Water glyceride, Polystyrene-Polyethylene-polybutene-polystyrene-g- glycidyl methacrylate and polystyrene-poly
One kind in butylene-polystyrene-g- glycidyl methacrylate or at least two mixture.
6. the three-decker water vapor rejection film according to one of claim 1-5, which is characterized in that the thickness of the intermediate core layer
Degree is 50~250 μm.
7. the three-decker water vapor rejection film according to one of claim 1-6, which is characterized in that the poly terephthalic acid
The thickness of ethylene glycol ester layer is 25~50 μm；
Preferably, the long-term heat resistance humidity index (TI) of the three-decker water vapor rejection film is not less than 105 DEG C.
8. a kind of preparation method of three-decker water vapor rejection film as described in claim 1, which is characterized in that the preparation side
Method includes the following steps：
1) blend is obtained after being blended as raw material using polyester, polyolefin and compatilizer；
2) blend is obtained as the material of intermediate core layer using step 1), is laid with respectively in the both sides up and down of the intermediate core layer poly-
Ethylene glycol terephthalate material, it is extruded, film forming after obtain the three-decker water vapor rejection film.
9. preparation method according to claim 8, which is characterized in that the mode of the film forming is biaxial tension film forming, list
To the one kind stretched in film forming and casting film-forming.
10. preparation method according to claim 8, which is characterized in that the preparation method includes the following steps：
1) by weight percentage, weigh 10~30% polyester, 65~85% polyolefin and 1~10% compatilizer, altogether
Blend is obtained after mixed；
2) blend is obtained as the material of intermediate core layer using step 1), is laid with respectively in the both sides up and down of the intermediate core layer poly-
Ethylene glycol terephthalate material, it is extruded, film forming after obtain the three-decker water vapor rejection film.
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| CN110993711A (en) * | 2019-11-05 | 2020-04-10 | 乐凯胶片股份有限公司 | Polyester base film for solar back sheet and solar back sheet |
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| CN117774471A (en) * | 2023-12-25 | 2024-03-29 | 宁波维创柔性电子技术有限公司 | High-barrier gas-phase rust-proof film and multilayer co-extrusion molding process thereof |
| CN117774471B (en) * | 2023-12-25 | 2024-06-18 | 宜兴维新科技有限公司 | High-barrier gas-phase rust-proof film and multilayer co-extrusion molding process thereof |
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