Summary of the invention
In view of the deficiencies of the prior art, the purpose of the present invention is to provide a kind of solar cell backboard substrates and preparation side
Method and solar cell backboard, the solar cell backboard substrate have good water vapor rejection ability, and are provided simultaneously with good
Thermal stability and mechanical performance.
To achieve this purpose, the present invention adopts the following technical scheme:
One of the objects of the present invention is to provide a kind of solar cell backboard substrate, the solar cell backboard substrate
Comprising core layer, by weight, the core layer includes following components:
Due to the design feature and crystallinity in process of polyolefin itself, film prepared therefrom obstructs steam
Ability is strong, and still, only the mechanical performance of the film itself of polyolefin preparation is bad, and especially break-draw rate is insufficient, and pure
Polyolefin film be easy be heat-shrinked under the high temperature conditions.The present invention selects main material of the polyolefin as backboard substrate
Material, the block-water performance that heat-resisting reinforced resin is added to enhance heat resistance, while keeping polyolefin outstanding, by by polyolefin,
Heat-resisting reinforced resin and toughener carry out tertiary blending, and the backboard substrate being prepared is under the ability for having water vapor rejection, also
With heat resistanceheat resistant shrinkage and good mechanical strength.
Wherein, by weight, the core layer includes following components:
60~85 parts of polyolefin, such as the parts by weight of polyolefin are 60 parts, 61 parts, 62 parts, 63 parts, 64 parts, 65 parts, 66
Part, 67 parts, 68 parts, 69 parts, 70 parts, 71 parts, 72 parts, 73 parts, 74 parts, 75 parts, 76 parts, 77 parts, 78 parts, 79 parts, 80 parts, 81
Part, 82 parts, 83 parts, 84 parts, 85 parts.
1~30 part of heat-resisting reinforced resin, such as the parts by weight of heat-resisting reinforced resin are 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6
Part, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22
Part, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts.
1~5 part of toughener, such as the parts by weight of toughener are 1 part, 2 parts, 3 parts, 4 parts, 5 parts.
1~5 part of compatilizer, such as the parts by weight of compatilizer are 1 part, 2 parts, 3 parts, 4 parts, 5 parts.
0~20 part of inorganic filler, such as the parts by weight of inorganic filler are 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8
Part, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts.
0~3 part of auxiliary agent, such as the parts by weight of auxiliary agent are 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts.
0~30 part of fire retardant, such as the parts by weight of fire retardant are 0,1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9
Part, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24
Part, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts.
Wherein, the polyolefin is one of polyethylene, polypropylene, ethylene-propylene copolymer and cycloolefin or at least
Two kinds of mixture.
In the present invention, the heat-resisting reinforced resin is polyester, polyketone, polyamide, cycloolefin, plastic polyurethane elastomer
(TPU), polyester and one of polyether block copolymer (TPEE) and mineral or at least two mixture.
Preferably, the polyester is polyethylene terephthalate, Isosorbide-5-Nitrae cyclohexanedimethanol polyester, poly- terephthaldehyde
One of sour butanediol ester, poly- 2,6- (ethylene naphthalate) and polypropylene terephthalate or at least two it is mixed
Close object.
Preferably, the polyamide is one kind or at least two in nylon 6, nylon 12, nylon 612, nylon 1212 and MXD6
The mixture of kind.
Preferably, the mineral are the mixing of one of talcum powder, carbon black, mica powder and barium sulfate or at least two
Object.
Wherein, the toughener be polyolefin elastomer (POE), ethylene propylene diene rubber (EPDM), ethylene vinyl acetate it is total
Polymers (EVA), ethylene-methyl acrylate copolymer (EMA), vinyl-acrylate copolymer (EAA), butadiene-styrene rubber
(SBR), Polystyrene-Polyethylene-polybutene-polystyrene (SEBS), polystyrene-poly butylene-polystyrene (SBS), ACR
In (general name of acrylic acid esters co-polymer) elastomer, methyl methacrylate, butadiene and styrene copolymer (MBS)
One kind or at least two mixture.
In the present invention, the compatilizer is that polyethylene-g- maleic anhydride, polypropylene-g- maleic anhydride, ethylene-propylene are total
Polymers-g- maleic anhydride, polyethylene-g- glycidyl methacrylate, polypropylene-g- glycidyl methacrylate,
Ethylene-propylene copolymer-g- glycidyl methacrylate, polyolefin elastomer-g- maleic anhydride, bibasic ethylene propylene rubber-
G- maleic anhydride, ethylene propylene diene rubber-g- maleic anhydride, ethylene-ethyl acetate copolymer-g- maleic anhydride, ethylene-methyl-prop
Olefin(e) acid ester copolymer-g- maleic anhydride, butadiene-styrene rubber-g- maleic anhydride, gathers vinyl-acrylate copolymer-g- maleic anhydride
Styrene-polyethylene-polybutene-polystyrene-g- maleic anhydride, polystyrene-poly butylene-polystyrene-g- maleic anhydride,
Polyolefin elastomer-g- glycidyl methacrylate, bibasic ethylene propylene rubber-g- glycidyl methacrylate, ternary
EP rubbers-g- glycidyl methacrylate, ethylene-ethyl acetate copolymer-g- glycidyl methacrylate, second
Alkene-methacrylate copolymer-g- glycidyl methacrylate, vinyl-acrylate copolymer-g- methacrylic acid
Ethylene oxidic ester, butadiene-styrene rubber-g- glycidyl methacrylate, Polystyrene-Polyethylene-polybutene-polystyrene-g-
One of glycidyl methacrylate and polystyrene-poly butylene-polystyrene-g- glycidyl methacrylate
Or at least two mixture.
In the present invention, the inorganic filler is one in talcum powder, titanium dioxide, montmorillonite, whisker, mica powder and calcium carbonate
Kind or at least two mixture.
Preferably, the auxiliary agent is antioxidant and/or hydrolysis agent.
Preferably, the fire retardant is to have one of halogen fire retardant, halogen-free flame retardants or inorganic matter.
Preferably, the fire retardant is one of aluminium hydroxide, magnesium hydroxide or bromobenzene.
In the present invention, the solar cell backboard substrate is made of core layer and adhesive layer;Adhesive layer enhances
The bonding force of core layer and package material.
Preferably, by weight, the adhesive layer includes following components:
Preferably, the inorganic filler is titanium dioxide or carbon black.
Preferably, the polyolefin blend is polyolefin and polyamide, ultra-high molecular weight polyethylene, cycloolefin, nylon
Or ASA (Acrylonitrile Styrene acrylate copolymer, engineering plastics are acrylate rubber like body with
The graft copolymer of acrylonitrile, styrene) at least one of mixture.Such as the polyolefin blend be polyolefin with
The mixture of the mixture of the mixture of polyamide, polyolefin and ultra-high molecular weight polyethylene, polyolefin and cycloolefin, polyolefin
With the mixture of nylon, the mixture of polyolefin and ASA, the mixture of polyolefin and polyamide, ultra-high molecular weight polyethylene gathers
The mixture of the mixture of alkene and polyamide, cycloolefin, polyolefin and polyamide, nylon, polyolefin and polyamide, ASA
The mixture of the mixture of mixture, polyolefin and ultra-high molecular weight polyethylene, cycloolefin, polyolefin and superhigh molecular weight polyethylene
The mixture of alkene, nylon, the mixture of polyolefin and ultra-high molecular weight polyethylene, ASA, polyolefin and cycloolefin, nylon it is mixed
Close object, the mixture of polyolefin and cycloolefin, ASA, the mixture of polyolefin and nylon, ASA, polyolefin and polyamide, superelevation
The mixture of molecular weight polyethylene, cycloolefin, polyolefin and polyamide, ultra-high molecular weight polyethylene, nylon mixture, polyene
Hydrocarbon and polyamide, ultra-high molecular weight polyethylene, ASA mixture, polyolefin and polyamide, cycloolefin, nylon mixture, gather
Alkene and polyamide, cycloolefin, ASA mixture, polyolefin and ultra-high molecular weight polyethylene, cycloolefin, nylon, ASA it is mixed
Close object, polyolefin and polyamide, ultra-high molecular weight polyethylene, cycloolefin, nylon, ASA mixture.
Preferably, the polyolefin is one of polyethylene, polypropylene, ethylene-propylene copolymer and cycloolefin or extremely
Few two kinds of mixture.Such as the polyolefin is polyethylene, polyacrylic mixture, polyethylene, ethylene-propylene copolymer
Mixture, the mixture of polyethylene, cycloolefin, the mixture of polypropylene, ethylene-propylene copolymer, polypropylene, cycloolefin it is mixed
Close object, the mixture of ethylene-propylene copolymer and cycloolefin, polyethylene, polypropylene, ethylene-propylene copolymer mixture, gather
Ethylene, polypropylene, cycloolefin mixture, the mixture of polyethylene, ethylene-propylene copolymer and cycloolefin, polypropylene, second
The mixture of alkene-propylene copolymer and cycloolefin, polyethylene, polypropylene, ethylene-propylene copolymer and cycloolefin mixture.
Preferably, the polyolefin blend is the copolymer of polyethylene and polyamide, the polyethylene and the polyamides
The mass ratio of amine is (1:10)~(10:1), such as the mass ratio of the polyethylene and the polyamide is 1:1,1:2,1:3,1:
4、1:5、1:6、1:7、1:8、1:9、1:10、2:1、2:3、2:5、2:7、2:9、3:1、3:2、3:4、3:5、3:7、3:8、3:10、
4:1、4:3、4:5、4:7、4:9、5:1、5:2、5:3、5:4、5:6、5:7、5:8、5:9、6:1、6:5、6:7、7:1、7:2、7:3、
7:4、7:5、7:6、7:8、7:9、7:10、8:1、8:3、8:5、8:7、8:9、9:1、9:2、9:4、9:5、9:7、9:8、9:10、10:
1、10:3、10:7、10:9。
Preferably, the ultra-high molecular weight polyethylene is the polyethylene that molecular weight is 1,000,000 or more.
Preferably, the polyethylene is one of low density polyethylene (LDPE), high density polyethylene (HDPE), linear low density polyethylene
Or at least two mixture, polyethylene improves the cohesive force of substrate and glue film.
Preferably, the auxiliary agent is the mixture of antioxidant and resistance to ultraviolet auxiliary agent.
Preferably, the mass ratio of the antioxidant and the resistance to ultraviolet auxiliary agent is (1:3)~(3:1), such as the antioxygen
The mass ratio of agent and the resistance to ultraviolet auxiliary agent is 1:1,1:2,1:3,2:1,2:3,3:1,3:2.
The second object of the present invention is to provide a kind of preparation side of solar cell backboard substrate described in the first purpose
Method, the preparation method is that, by weight, by 60~85 parts of polyolefin, 1~30 part of heat-resisting reinforced resin, 1~5 part
Toughener, 1~5 part of compatilizer, 0~20 part of inorganic filler, 0~3 part of auxiliary agent and 0~30 part fire retardant be blended and squeeze
It forms a film out, the solar cell backboard substrate with core layer is prepared.
The solar cell backboard substrate further includes adhesive layer, and the core layer and the adhesive layer pass through extrusion
Film forming.
Wherein, the mode of the film extrusion is one of biaxial tension, simple tension, the tape casting or rolling process.
The third object of the present invention is to provide a kind of solar cell backboard, and the solar cell backboard includes successively
Resistance to ultraviolet layer, glue layer, core layer, adhesive layer and/or the easy adhesive coating being arranged.
Wherein, one of for the purpose of the adhesive layer described in adhesive layer, pass through film extrusion;Easy adhesive coating is
Coated on core layer or coated in adhesive layer by way of coating.
Wherein, the resistance to ultraviolet layer is resistance to ultraviolet fluorine film (for example, PVDF thin film) or resistance to ultraviolet PET (poly terephthalic acid
Glycol ester, for example, the D269 type PET of Sichuan Dong Cai Science and Technology Ltd.) layer.
Preferably, the easy adhesive coating is fluorine-containing coat or acrylic acid coatings.
Compared with prior art, the invention has the benefit that
(1) solar cell backboard substrate of the invention has good water vapor rejection ability, and is provided simultaneously with good
Thermal stability and mechanical performance, water vapor transmittance are 0.1~2.1g/m2Day, longitudinal percent thermal shrinkage are 0.02~0.04%,
Lateral percent thermal shrinkage is 0.01~0.03%, and longitudinal tensile strength is 28~35MPa, and transverse tensile strength is 20~30MPa, is indulged
It is 150~250% to break-draw rate, transverse breakage extensibility is 80~190%.
(2) solar cell backboard of the invention, molding is simple, can be recycled, and water vapor barrier property is good, viscous with packaging adhesive film
Connecing property is excellent, cell piece can be prevented to be oxidized, and improves the generating efficiency of cell piece, extends the use of solar cell module
Service life.
(3) preparation method of solar cell backboard substrate of the invention is simple, can be widely used for solar cell back
The processing of plate.
Embodiment 7
By polypropylene 700g, TPEE 200g, vinyl-acrylate copolymer 30g, polystyrene-poly butylene-polyphenyl second
Alkene-g- glycidyl methacrylate 70g is mixed, as core layer;Again by low density polyethylene (LDPE) 60g, polypropylene
10g, polyethylene-polyamide copolymer 1 5g, titanium dioxide 5g, antioxidant 0.2g, resistance to ultraviolet auxiliary agent 0.5g are mixed, as
Adhesive layer, two layers by be cast co-extrusion form a film to obtain solar cell backboard substrate.
Comparative example 1
Polyethylene 1000g is prepared into solar cell backboard substrate as core layer by casting film-forming.
Comparative example 2
Polyethylene terephthalate 1000g is prepared into solar battery back as core layer by biaxial tension film forming
Plate substrate.
Comparative example 3
By polypropylene 860g, polyethylene terephthalate 40g, vinyl-acrylate copolymer 30g, polystyrene-
Polybutene-polystyrene-g- glycidyl methacrylate 70g is mixed, as core layer;Again by low density polyethylene (LDPE)
60g, polypropylene 10g, polyethylene-polyamide copolymer 1 5g, titanium dioxide 5g, antioxidant 0.2g, resistance to ultraviolet auxiliary agent 0.5g are carried out
Mixing, as adhesive layer, two layers by curtain coating co-extrusion form a film to obtain solar cell backboard substrate.
Comparative example 4
By polypropylene 600g, polyethylene terephthalate 350g, vinyl-acrylate copolymer 10g, polyphenyl second
Alkene-polybutene-polystyrene-g- glycidyl methacrylate 40g is mixed, as core layer;Low-density is gathered again
Ethylene 60g, polypropylene 10g, polyethylene-polyamide copolymer 1 5g, titanium dioxide 5g, antioxidant 0.2g, resistance to ultraviolet auxiliary agent 0.5g
Mixed, as adhesive layer, two layers by be cast co-extrusion form a film to obtain solar cell backboard substrate.
Comparative example 5
By polypropylene 600g, polyethylene terephthalate 250g, vinyl-acrylate copolymer 100g, polyphenyl second
Alkene-polybutene-polystyrene-g- glycidyl methacrylate 50g is mixed, as core layer;Low-density is gathered again
Ethylene 60g, polypropylene 10g, polyethylene-polyamide copolymer 1 5g, titanium dioxide 5g, antioxidant 0.2g, resistance to ultraviolet auxiliary agent 0.5g
Mixed, as adhesive layer, two layers by be cast co-extrusion form a film to obtain solar cell backboard substrate.
Comparative example 6
By polyamide 700g, polyethylene terephthalate 200g, vinyl-acrylate copolymer 30g, polyphenyl second
Alkene-polybutene-polystyrene-g- glycidyl methacrylate 70g is mixed, as core layer;Low-density is gathered again
Ethylene 60g, polypropylene 10g, polyethylene-polyamide copolymer 1 5g, titanium dioxide 5g, antioxidant 0.2g, resistance to ultraviolet auxiliary agent 0.5g
Mixed, as adhesive layer, two layers by be cast co-extrusion form a film to obtain solar cell backboard substrate.
This comparative example compared with Example 6, the difference is that, polyolefin replaces with polyamide, it is other with implementation
Example 6 is identical.
Comparative example 7
By polypropylene 700g, polyethylene glycol 200 g, vinyl-acrylate copolymer 30g, polystyrene-poly butylene-polyphenyl
Ethylene-g- glycidyl methacrylate 70g is mixed, as core layer;Again by low density polyethylene (LDPE) 60g, polypropylene
10g, polyethylene-polyamide copolymer 1 5g, titanium dioxide 5g, antioxidant 0.2g, resistance to ultraviolet auxiliary agent 0.5g are mixed, as
Adhesive layer, two layers by be cast co-extrusion form a film to obtain solar cell backboard substrate.
This comparative example compared with Example 6, the difference is that, heat-resisting reinforced resin replaces with polyethylene glycol, other
It is same as Example 6.
Comparative example 8
By polypropylene 700g, polyethylene terephthalate 200g, polyethers 30g, polystyrene-poly butylene-polyphenyl second
Alkene-g- glycidyl methacrylate 70g is mixed, as core layer;Again by low density polyethylene (LDPE) 60g, polypropylene
10g, polyethylene-polyamide copolymer 1 5g, titanium dioxide 5g, antioxidant 0.2g, resistance to ultraviolet auxiliary agent 0.5g are mixed, as
Adhesive layer layer, two layers by be cast co-extrusion form a film to obtain solar cell backboard substrate.
This comparative example compared with Example 6, the difference is that, toughener replaces with polyethers, it is other with embodiment 6
It is identical.
Embodiment 1-7 and solar cell backboard substrate made from comparative example 1-8 are tested for the property, test result is such as
Shown in table 1.Wherein, the ability of thin-film barrier steam is determined by steam penetrating capacity experiment.Wherein, steam penetrating capacity
It is lower, illustrate that water vapor rejection ability is stronger;Steam penetrating capacity is higher, illustrates that water vapor rejection ability is weaker.It is saturating to test vapor
Instrument used in excess is U.S. MOCON moisture-inhibiting instrument.The mechanical performance of film is by the direction MD and TD tensile strength and breaks
Extensibility is split to be measured.Wherein, tensile strength and break-draw rate are bigger, illustrate that the mechanical performance of film is better.Test
Instrument used in mechanical performance is electronic universal tester AGS-X Shimadzu.The stability of film passes through test MD and the side TD
To percent thermal shrinkage measured.Wherein, shrinking percentage is smaller, illustrates that thermal stability is better.Test is heat-shrinked used instrument
Device is Nikon Quadratic Finite Element.
Table 1
As can be seen from Table 1, the present invention has by adjusting raw material and proportion, solar cell backboard substrate obtained
Good water vapor rejection ability, and it is provided simultaneously with good thermal stability and mechanical performance, water vapor transmittance is 0.1~2.1g/
M2day, longitudinal percent thermal shrinkage are 0.02~0.04%, and lateral percent thermal shrinkage is 0.01~0.03%, and longitudinal tensile strength is
28~35MPa, transverse tensile strength are 20~30MPa, and longitudinal fracture extensibility is 150~250%, and transverse breakage extensibility is
80~190%, there is good flame retardant property,.Solar cell backboard of the invention, molding is simple, can be recycled, water vapor rejection
Property is good, excellent with the cementability of packaging adhesive film, and cell piece can be prevented to be oxidized, improve the generating efficiency of cell piece, extended
The service life of component.
Above embodiments are only used to illustrate method detailed of the invention, and the invention is not limited to above-mentioned method detaileds, i.e.,
Do not mean that the invention must rely on the above detailed methods to implement.It should be clear to those skilled in the art, right
Any improvement of the invention, the addition of equivalence replacement and auxiliary element to each raw material of product of the present invention, the selection of concrete mode
Deng all of which fall within the scope of protection and disclosure of the present invention.