CN103144390B - A kind of solar cell backboard - Google Patents
A kind of solar cell backboard Download PDFInfo
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- CN103144390B CN103144390B CN201310073074.3A CN201310073074A CN103144390B CN 103144390 B CN103144390 B CN 103144390B CN 201310073074 A CN201310073074 A CN 201310073074A CN 103144390 B CN103144390 B CN 103144390B
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Abstract
The invention provides a kind of solar cell backboard, comprise the first weather-proof barrier layer, First Transition layer, structure enhancement layer, the second transition zone and the second weather-proof barrier layer that superpose setting successively; The material of described First Transition layer is the first resin alloy, and described first resin alloy comprises the raw material of the first weather-proof barrier layer and the raw material of structure enhancement layer; The material of described second transition zone is the second resin alloy, and described second resin alloy comprises the raw material of the second weather-proof barrier layer and the raw material of structure enhancement layer.First Transition layer in solar cell backboard provided by the invention had both comprised the raw material of the first weather-proof barrier layer, also comprised the raw material of structure enhancement layer; Second transition zone is also the raw material both having comprised the second weather-proof barrier layer, also comprise the raw material of structure enhancement layer, like this be arranged so that, between weather-proof barrier layer and structure enhancement layer, there is good compatibility, combined together in the interface of weather-proof barrier layer and structure enhancement layer, thus improve the peel strength between each layer.
Description
Technical field
The present invention relates to technical field of solar, particularly relate to a kind of solar cell backboard.
Background technology
Solar energy is the energy of the nuclear fusion reaction process generation that solar interior constantly carries out.Usual so-called solar energy resources, comprise the solar radiant energy directly projected on earth surface, fossil fuel energy, wind energy, ocean energy, tide energy and biomass energy, the solar energy of narrow sense is then limited to the photo-thermal of solar radiant energy, photoelectricity and photochemical direct conversion.In prior art, said solar energy generally refers to the emittance of sunshine, be generally used as generating, and prior art mainly utilizes the emittance of its sunshine to the utilization of solar energy in the modern times.Solar energy is a kind of energy of cleaning, produces any pollution hardly during its development and utilization, in addition the unlimitedness of its reserves, is the alternative energy source of ideals of human being.To in effective utilization of solar energy, large sun can solar photovoltaic utilization be research field with fastest developing speed in the last few years, most active.In the solar photovoltaic utilization of solar energy is beneficial to, what be most widely used is solar cell, make solar cell mainly based on semi-conducting material, its operation principle photoelectricity occurs in conversion reaction after utilizing photoelectric material to absorb luminous energy, silicon is optimal solar cell material, and the crystal silicon solar batteries grown up on this basis occupies leading position in the application.
Typical crystal silicon solar batteries assembly comprises: glass, solar battery sheet, packaging adhesive film and solar cell backboard.Wherein, the Main Function of solar cell backboard is the bulk strength improving solar panel, can intercept steam in addition, prevent water vapor permeable in sealant, affect the service life of cell piece.Therefore solar cell backboard will have insulation, the characteristic such as ageing-resistant, water-fast and corrosion-resistant.Main flow solar cell backboard structure comprises the weathering layer, adhesive linkage, structure enhancement layer, adhesive linkage and the weathering layer that superpose successively in the market, and wherein adhesive linkage is obtained after desolventizing by adhesive.But there is following defect in this solar cell backboard bondd by binding agent: in binding agent, solvent can produce to pollute to environment and can cause murder by poisoning to people; Owing to requiring higher for the adhesive quality in solar cell backboard, directly cause the increase of backboard producer cost; The main employing coating complex technique of this backboard containing adhesive linkage structure is produced, and the investment of equipment is large, and operation expense is higher, and the uneven thickness of adhesive linkage, cause the interlaminar strength of backboard not high.
In order to solve the technical problem that binding agent brings, prior art is devoted to the solar cell backboard studying binder free.The Chinese patent being 201110004231. as application number discloses a kind of backboard produced without the need to three layers of melting coextrusion the tape casting of adhesive, its weather-proof barrier layer is quality proportioning is (70 ~ 85): Kynoar (PVDF) and ethylene-vinyl acetate copolymer (EVA) alloy of (30 ~ 15); Structure enhancement layer is quality proportioning is (60 ~ 80): the PETG of (35 ~ 20) and polymethyl methacrylate alloy; Weather-proof resistance wet layer is quality proportioning is (60 ~ 80): Kynoar (PVDF) and PVOH butyral (PVB) alloy of (40 ~ 20).This backboard is owing to adding more EVA in weathering layer, weatherability will reduce.
In order to ensure the combination property of solar cell backboard under the condition of inapplicable binding agent, application number be 201010220596.8 Chinese patent disclose a kind of backboard of seven-layer structure of non-adhesive, be specially weathering layer 1, transition zone 1, adhesive linkage 1, structure enhancement layer, adhesive linkage 2, transition zone 2 and weathering layer 2, its two-layer weathering layer is fluoroplastics and acrylic acid or its esters resin alloy, two-layer transition zone is fluoroplastics and acrylic acid or its esters resin alloy, two-layer bonded layer is ethene and polar resin copolymer, and structure enhancement layer is polyester resin.But the peel strength of each interlayer of the backboard of this seven-layer structure is lower, have impact on the service life of solar cell backboard.
Summary of the invention
The object of the present invention is to provide a kind of solar cell backboard, each interlayer of solar cell backboard provided by the invention has higher compatibility, makes each interlayer have higher peel strength, thus makes solar cell backboard have longer service life.
The invention provides a kind of solar cell backboard, comprise the first weather-proof barrier layer, First Transition layer, structure enhancement layer, the second transition zone and the second weather-proof barrier layer that superpose setting successively;
The material of described First Transition layer is the first resin alloy, and described first resin alloy comprises the raw material of the first weather-proof barrier layer and the raw material of structure enhancement layer;
The material of described second transition zone is the second resin alloy, and described second resin alloy comprises the raw material of the second weather-proof barrier layer and the raw material of structure enhancement layer.
Preferably, the thickness of described first weather-proof barrier layer is 20 μm ~ 40 μm;
The thickness of described second weather-proof barrier layer is 20 μm ~ 40 μm;
The thickness of described First Transition layer is 5 μm ~ 40 μm;
The thickness of described second transition zone is 5 μm ~ 40 μm;
The thickness of described structure enhancement layer is 100 μm ~ 400 μm.
Preferably, described first weather-proof barrier layer comprises the component of following weight portion:
The fluororesin of 50 parts ~ 100 parts;
The acrylic resin of 1 part ~ 50 parts;
The inorganic filler of 1 part ~ 20 parts;
The antioxidant of 0.5 part ~ 5 parts;
The ultra-violet absorber of 0.1 part ~ 2 parts.
Preferably, described first weather-proof barrier layer is identical with the composition of the second weather-proof barrier layer.
Preferably, described fluororesin is one or more in the rare TFE copolymer of polyvinyl fluoride, Kynoar, polytetrafluoroethylene (PTFE) and second.
Preferably, described inorganic filler be in titanium dioxide, silica, barium sulfate, aluminium oxide and calcium carbonate one or more.
Preferably, described structure enhancement layer comprises the component of following weight portion:
The acrylic resin of 50 parts ~ 100 parts;
Be not more than the mylar of 50 parts;
Be not more than the antioxidant of 5 parts.
Preferably, described acrylic resin is alkyl methacrylate;
Described mylar is one or more in PETG, PTT, polybutylene terephthalate (PBT) and PEN.
Preferably, described ultra-violet absorber is independently selected from one or more in Benzotriazole Ultraviolet Stabilizer, benzophenone ultraviolet absorbent, benzylidene malonate class ultra-violet absorber and quinazoline ditosylate salt ultra-violet absorber.
Preferably, described acrylic resin is independently selected from alkyl methacrylate.
The invention provides a kind of solar cell backboard, comprise the first weather-proof barrier layer, First Transition layer, structure enhancement layer, the second transition zone and the second weather-proof barrier layer that superpose setting successively; The material of described First Transition layer is the first resin alloy, and described first resin alloy comprises the raw material of the first weather-proof barrier layer and the raw material of structure enhancement layer; The material of described second transition zone is the second resin alloy, and described second resin alloy comprises the raw material of the second weather-proof barrier layer and the raw material of structure enhancement layer.Solar cell backboard provided by the invention comprises five-layer structure, be respectively the first weather-proof barrier layer, First Transition layer, structure enhancement layer, the second transition zone and the second weather-proof barrier layer, wherein First Transition layer had both comprised the component of the first weather-proof barrier layer, also comprised the component of structure enhancement layer; Second transition zone is also the component both having comprised the second weather-proof barrier layer, also comprise the component of structure enhancement layer, like this be arranged so that, between weather-proof barrier layer and structure enhancement layer, there is good compatibility, combined together in the interface of weather-proof barrier layer and structure enhancement layer, thus the peel strength that improve between each layer, and then the service life of solar cell backboard can be extended, be beneficial to its application.Experimental result shows, peel strength between the weather-proof barrier layer of solar cell backboard first provided by the invention and First Transition layer is at about 30N/cm, peel strength between First Transition layer and structure enhancement layer at about 38N/cm, far away higher than peel strength 4N/cm ~ 8N/cm that gluing formulation backboard disclosed in prior art once added.
Detailed description of the invention
The invention provides a kind of solar cell backboard, comprise the first weather-proof barrier layer, First Transition layer, structure enhancement layer, the second transition zone and the second weather-proof barrier layer that superpose setting successively;
The material of described First Transition layer is the first resin alloy, and described first resin alloy comprises the raw material of the first weather-proof barrier layer and the raw material of structure enhancement layer;
The material of described second transition zone is the second resin alloy, and described second resin alloy comprises the raw material of the second weather-proof barrier layer and the raw material of structure enhancement layer.
The present invention studies discovery, and the solar cell backboard of thing binding agent disclosed in prior art, because the compatibility of each interlayer is poor, makes the peel strength of each interlayer lower.Solar cell backboard provided by the invention comprises five-layer structure, be respectively the first weather-proof barrier layer, First Transition layer, structure enhancement layer, the second transition zone and the second weather-proof barrier layer, wherein First Transition layer had both comprised the raw material of the first weather-proof barrier layer, also comprised the raw material of structure enhancement layer; Second transition zone is also the raw material both having comprised the second weather-proof barrier layer, also comprise the raw material of structure enhancement layer, like this be arranged so that, between weather-proof barrier layer and structure enhancement layer, there is good compatibility, combined together in the interface of weather-proof barrier layer and structure enhancement layer, thus the peel strength that improve between each layer, and then the service life of solar cell backboard can be extended, be beneficial to its application.
Solar cell backboard provided by the invention comprises the first weather-proof barrier layer and the second weather-proof barrier layer.In the present invention, the thickness of described first weather-proof barrier layer is preferably 20 μm ~ 40 μm, is more preferably 25 μm ~ 35 μm; The thickness of described second weather-proof barrier layer is preferably 20 μm ~ 40 μm, is more preferably 25 μm ~ 35 μm; The thickness of described second weather-proof barrier layer preferably with described first weather-proof intercept into identical;
In the present invention, described first weather-proof barrier layer preferably includes the component of following weight portion:
The fluororesin of 50 parts ~ 100 parts;
The acrylic resin of 1 part ~ 50 parts;
The inorganic filler of 1 part ~ 20 parts;
The antioxidant of 0.5 part ~ 5 parts;
The ultra-violet absorber of 0.1 part ~ 2 parts.
By weight, in the present invention, described first weather-proof barrier layer preferably includes the fluororesin of 50 parts ~ 100 parts, is more preferably 60 parts ~ 90 parts, most preferably is 70 parts ~ 80 parts.The kind of the present invention to described fluororesin does not have special restriction, adopts well known to those skilled in the art for the fluororesin in solar cell backboard.In the present invention, described fluororesin be preferably in polyvinyl fluoride (PVF), Kynoar (PVDF), polytetrafluoroethylene (PTFE) and the rare TFE copolymer of second (ETFE) one or more, be more preferably Kynoar (PVDF);
By weight, in the present invention, described first weather-proof barrier layer preferably includes the acrylic resin of 1 part ~ 50 parts, is more preferably 5 parts ~ 45 parts, most preferably is 15 parts ~ 35 parts.The kind of the present invention to described acrylic resin does not have special restriction, adopts well known to those skilled in the art for the acrylic resin in solar cell backboard.In the present invention, described acrylic resin is preferably alkyl methacrylate, is more preferably polymethyl methacrylate;
By weight, in the present invention, described first weather-proof barrier layer preferably includes the inorganic filler of 1 part ~ 20 parts, is more preferably 5 parts ~ 15 parts.In the present invention; described inorganic filler can not only provide the intensity of high durable barrier layer; and described inorganic filler has higher refractive index; strong scattering effect is had to light; can ultraviolet be absorbed simultaneously, and then protection polymer, prevent weather-proof barrier layer from fading under ultraviolet light; thus improve resistance to ag(e)ing and the chemical stability of weather-proof barrier layer, increase the service life.In the present invention, described inorganic filler to be preferably in titanium dioxide, silica, barium sulfate, aluminium oxide and calcium carbonate one or more, is more preferably titanium dioxide; The particle diameter of described inorganic filler is preferably 0.05 μm ~ 1mm, is more preferably 0.1 μm ~ 0.1mm, most preferably is 1 μm ~ 0.01mm;
By weight, in the present invention, described first weather-proof barrier layer preferably includes the antioxidant of 0.5 part ~ 5 parts, is more preferably 1 part ~ 4 parts, most preferably is 1.5 parts ~ 3.5 parts.In the present invention, described antioxidant can block, suppress or delay polymer oxidation or autoxidation process, extends the service life of polymer.The kind of the present invention to described antioxidant does not have special restriction, adopts antioxidant well known to those skilled in the art.In the present invention, described antioxidant is preferably antioxidant 1076 (β-(3, 5-di-tert-butyl-hydroxy phenyl) the positive octadecanol ester of propionic acid), antioxidant 2246 (2, 2'-di-2-ethylhexylphosphine oxide-(4-methyl-6-tert-butylphenol)), antioxidant 245(triethylene-glycol two [β-(3-tertiary butyl-4-hydroxy-5-aminomethyl phenyl) propionic ester]) and antioxidant 1010 (four [β-(3, 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester) and in one or more, be more preferably antioxidant 1010 (four [β-(3, 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester),
By weight, in the present invention, described first weather-proof barrier layer preferably includes the ultra-violet absorber of 0.1 part ~ 2 parts, is more preferably 0.5 part ~ 1.5 parts.In the present invention, described ultra-violet absorber be preferably in Benzotriazole Ultraviolet Stabilizer, benzophenone ultraviolet absorbent, benzylidene malonate class ultra-violet absorber and quinazoline ditosylate salt ultra-violet absorber one or more, be preferably Benzotriazole Ultraviolet Stabilizer.The source of the present invention to described ultra-violet absorber does not have special restriction, adopts the commercial goods of ultra-violet absorber well known to those skilled in the art, as adopted Ciba SpecialtyChemicals(Ciba) produce model be
213 or
the ultra-violet absorber of 109, preferred model is
the ultra-violet absorber of 234.
In the present invention, described second weather-proof barrier layer is preferably identical with the composition of the weather-proof barrier layer of first described in technique scheme.
Solar cell backboard provided by the invention comprises structure enhancement layer, and the thickness of described structure enhancement layer is preferably 100 μm ~ 400 μm, is more preferably 120 μm ~ 380 μm, most preferably is 150 μm ~ 350 μm, is the most preferably 200 μm ~ 300 μm.
In the present invention, described structure enhancement layer preferably includes the component of following weight portion:
The acrylic resin of 50 parts ~ 100 parts;
Be not more than the mylar of 50 parts;
Be not more than the antioxidant of 5 parts.
In the present invention, by weight, described structure enhancement layer preferably includes the acrylic resin of 50 parts ~ 100 parts, is more preferably 60 parts ~ 90 parts, most preferably is 70 parts ~ 80 parts.The kind of the present invention to described acrylic resin does not have special restriction, adopts well known to those skilled in the art for the acrylic resin in solar cell backboard.In the present invention, described acrylic resin is preferably alkyl methacrylate, is more preferably polymethyl methacrylate;
In the present invention, by weight, described structure enhancement layer preferably includes the mylar being not more than 50 parts, is more preferably 5 parts ~ 45 parts, most preferably is 15 parts ~ 35 parts.In the present invention, described mylar is for strengthening resin, mechanical strength and the ageing-resistant performance of structure enhancement layer can be improved, described polyester be preferably in PETG (PET), PTT (PTT), polybutylene terephthalate (PBT) (PBT) and PEN (PEN) one or more, be more preferably PETG (PET);
In the present invention, by weight, described structure enhancement layer preferably includes the antioxidant being not more than 5 parts, is more preferably 0.5 part ~ 4.5 parts, most preferably is 1.5 parts ~ 3.5 parts.In the present invention, described antioxidant can block, suppress or delay polymer oxidation or autoxidation process, extends the service life of polymer.The kind of the present invention to described antioxidant does not have special restriction, adopts antioxidant well known to those skilled in the art.In the present invention, described antioxidant is preferably antioxidant 1076 (β-(3, 5-di-tert-butyl-hydroxy phenyl) the positive octadecanol ester of propionic acid), antioxidant 2246 (2, 2'-di-2-ethylhexylphosphine oxide-(4-methyl-6-tert-butylphenol)), antioxidant 245(triethylene-glycol two [β-(3-tertiary butyl-4-hydroxy-5-aminomethyl phenyl) propionic ester]) and antioxidant 1010 (four [β-(3, 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester) and in one or more, be more preferably antioxidant 1010 (four [β-(3, 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester).
Solar cell backboard provided by the invention comprises First Transition layer and the second transition zone, described First Transition layer is arranged between described first weather-proof barrier layer and described structure enhancement layer, and described second transition zone is arranged between described structure enhancement layer and described second weather-proof barrier layer.The material of described First Transition layer is the first resin alloy, described first resin alloy comprises the component of the first weather-proof barrier layer and the component of structure enhancement layer, that is, the component of described First Transition layer comprises the component of the first weather-proof barrier layer and the component of structure enhancement layer, thus make the component of existing first weather-proof barrier layer in First Transition layer, there is again the component of structure enhancement layer, the first weather-proof barrier layer and structure enhancement layer is made to have higher compatibility, combined together in the interface of the first weather-proof barrier layer and structure enhancement layer, improve the peel strength between the first weather-proof barrier layer and structure enhancement layer,
As be 50 parts of PVDF and 38 part polymethyl methacrylates when the material of the first weather-proof barrier layer, the material of the first structure enhancement layer be 45 parts of PET time, the material of described First Transition layer is 50 parts of PVDF, 38 parts of polymethyl methacrylates and 45 parts of PET;
In the present invention, the material of described second transition zone is the second resin alloy, described second resin alloy comprises the component of the second weather-proof barrier layer and the component of structure enhancement layer, that is, the component of described second transition zone comprises the component of the second weather-proof barrier layer and the component of structure enhancement layer, thus make the component of existing second weather-proof barrier layer in the second transition zone, there is again the component of structure enhancement layer, the second weather-proof barrier layer and structure enhancement layer is made to have higher compatibility, combined together in the interface of the second weather-proof barrier layer and structure enhancement layer, improve the peel strength between the second weather-proof barrier layer and structure enhancement layer,
In the present invention, thickness and the composition of described First Transition layer preferably with the thickness of the second transition zone with form identical.
The preparation method of the present invention to solar cell backboard does not have special restriction, adopts technical scheme prepared by solar cell backboard well known to those skilled in the art.In the present invention, described first weather-proof barrier layer is preferably identical with thickness with the composition of the second weather-proof barrier layer, in the technology of preparing scheme of following solar energy backboard, first weather-proof barrier layer and the second weather-proof barrier layer are referred to as weather-proof barrier layer, and the solar cell backboard described in technique scheme is preferably prepared in accordance with the following methods:
A), after the component mixing comprised by the weather-proof barrier layer described in technique scheme, extruding pelletization is carried out;
B), after the component mixing comprised by the structure enhancement layer described in technique scheme, extruding pelletization is carried out;
The granulation product obtain described step a) and step b) and mylar are extruded respectively, adopt 5 layers to extrude casting head and carry out qualitative, obtain solar cell backboard;
Described step a) and described step b) not order limit.
The component mixing that weather-proof barrier layer described in technique scheme comprises by the present invention, carries out extruding pelletization by the material mixed obtained, obtains granulation product.The method of the present invention to described extruding pelletization does not have special restriction, adopts the technical scheme of extruding pelletization well known to those skilled in the art.In the present invention, described extruding pelletization is preferably Co rotating Twin Screw Extrusion granulation; The temperature of described extruding pelletization is preferably 170 DEG C ~ 270 DEG C, is more preferably 180 DEG C ~ 260 DEG C, most preferably is 200 DEG C ~ 250 DEG C;
The component mixing that structure enhancement layer described in technique scheme comprises by the present invention, carries out extruding pelletization by the material mixed obtained, obtains granulation product.The method of the present invention to described extruding pelletization does not have special restriction, adopts the technical scheme of extruding pelletization well known to those skilled in the art.In the present invention, described extruding pelletization is preferably Co rotating Twin Screw Extrusion granulation; The temperature of described extruding pelletization is preferably 170 DEG C ~ 270 DEG C, is more preferably 180 DEG C ~ 260 DEG C, most preferably is 200 DEG C ~ 250 DEG C;
After obtaining the granulation product of step a) and step b), the granulation product that described step a) and step b) obtain by the present invention and mylar are extruded respectively, adopt 5 layers to extrude casting head and carry out qualitative, obtain solar cell backboard.The granulation product that described step a) and step b) preferably obtain by the present invention and mylar join in three single screw extrusion machines respectively, and adopt 5 layers to extrude casting head and shape, curtain coating obtains solar cell backboard after extruding.
The invention provides a kind of solar cell backboard, comprise the first weather-proof barrier layer, First Transition layer, structure enhancement layer, the second transition zone and the second weather-proof barrier layer that superpose setting successively; The material of described First Transition layer is the first resin alloy, and described first resin alloy comprises the raw material of the first weather-proof barrier layer and the raw material of structure enhancement layer; The material of described second transition zone is the second resin alloy, and described second resin alloy comprises the raw material of the second weather-proof barrier layer and the raw material of structure enhancement layer.Solar cell backboard provided by the invention comprises five-layer structure, be respectively the first weather-proof barrier layer, First Transition layer, structure enhancement layer, the second transition zone and the second weather-proof barrier layer, wherein First Transition layer had both comprised the component of the first weather-proof barrier layer, also comprised the component of structure enhancement layer; Second transition zone is also the component both having comprised the second weather-proof barrier layer, also comprise the component of structure enhancement layer, like this be arranged so that, between weather-proof barrier layer and structure enhancement layer, there is good compatibility, combined together in the interface of weather-proof barrier layer and structure enhancement layer, thus the peel strength that improve between each layer, and then the service life of solar cell backboard can be extended, be beneficial to its application.Experimental result shows, peel strength between the weather-proof barrier layer of solar cell backboard first provided by the invention and First Transition layer is at about 30N/cm, peel strength between First Transition layer and structure enhancement layer at about 38N/cm, far away higher than peel strength 4N/cm ~ 8N/cm that gluing formulation backboard disclosed in prior art once added.
In order to further illustrate the present invention, below in conjunction with embodiment, solar cell backboard provided by the invention is described in detail, but they can not be interpreted as limiting the scope of the present invention.
In the following embodiments, the thickness of the first weather-proof barrier layer and the second weather-proof barrier layer is 30 μm, and the thickness of First Transition layer and the second transition zone is 10 μm, and the thickness of structure enhancement layer is 250 μm.
Embodiment 1
By weight, by 50 parts of PVDF resins, 38 parts of PMMA resins, 10 parts of titanium dioxide, 1 part of antioxidant 1010 and 1 part
234 mix after under the extrusion temperature of 170 DEG C, carry out extruding pelletization, obtain the raw material of the first weather-proof barrier layer, the second weather-proof barrier layer and transition zone;
By weight, under the extrusion temperature of 170 DEG C, carry out extruding pelletization after 50 parts of PMMA resins, 45 parts of PET resin and 5 parts of antioxidant 1010s being mixed, extrusion temperature 170 DEG C, obtains the raw material of structure enhancement layer and transition zone;
The enhancing resin PET being 40 parts by above-mentioned two kinds of resin alloies prepared and parts by weight joins three single screw extrusion machines respectively, adopts common 5 layers to extrude casting head and shape, obtains solar cell backboard.Or that says more knows some
The solar cell backboard obtained is carried out performance test by the present invention, and result is as shown in table 1, the performance test results of the solar cell backboard that table 1 obtains for the embodiment of the present invention.
Embodiment 2
By weight, by 65 parts of PVDF resins, 23 parts of PMMA resins, 10 parts of titanium dioxide, 1 part of antioxidant 1010 and 1 part
234 mix after under the extrusion temperature of 270 DEG C, carry out extruding pelletization, obtain the raw material of the first weather-proof barrier layer, the second weather-proof barrier layer and transition zone;
By weight, under the extrusion temperature of 270 DEG C, carry out extruding pelletization after 50 parts of PMMA resins, 45 parts of PET resin and 5 parts of antioxidant 1010s being mixed, obtain the raw material of structure enhancement layer and transition zone;
By above-mentioned two kinds of raw materials prepared and parts by weight be 50 parts to strengthen resin PET and join respectively in three single screw extrusion machines, adopt common 5 layers to extrude casting head and shape, obtain solar cell backboard.
The solar cell backboard obtained is carried out performance test by the present invention, and result is as shown in table 1, the performance test results of the solar cell backboard that table 1 obtains for the embodiment of the present invention.
Embodiment 3
By weight, by 75 parts of PVDF resins, 13 parts of PMMA resins, 10 parts of titanium dioxide, 1 part of antioxidant 1010 and 1 part
234 mix after under the extrusion temperature of 220 DEG C, carry out extruding pelletization, obtain the raw material of the first weather-proof barrier layer, the second weather-proof barrier layer and transition zone;
By weight, under the extrusion temperature of 250 DEG C, carry out extruding pelletization after 50 parts of PMMA resins, 45 parts of PET resin and 5 parts of antioxidant 1010s being mixed, obtain the raw material of structure enhancement layer and transition zone;
By above-mentioned two kinds of raw materials prepared and parts by weight be 40 parts to strengthen resin PET and join respectively in three single screw extrusion machines, adopt common 5 layers to extrude casting head and shape, obtain solar cell backboard.
The solar cell backboard obtained is carried out performance test by the present invention, and result is as shown in table 1, the performance test results of the solar cell backboard that table 1 obtains for the embodiment of the present invention.
The performance test results of the solar cell backboard that table 1 embodiment of the present invention obtains
As can be seen from Table 1, the properties of solar cell backboard provided by the invention all can meet the instructions for use of solar cell backboard, and between each layer, there is higher peel strength, far away higher than the peel strength between formulation backsheet layer gluing disclosed in prior art, peel strength disclosed in prior art between gluing formulation backsheet layer is generally 4N/cm ~ 8N/cm, therefore, solar cell backboard provided by the invention can have longer service life.
As seen from the above embodiment, the invention provides a kind of solar cell backboard, comprise the first weather-proof barrier layer, First Transition layer, structure enhancement layer, the second transition zone and the second weather-proof barrier layer that superpose setting successively; The material of described First Transition layer is the first resin alloy, and described first resin alloy comprises the raw material of the first weather-proof barrier layer and the raw material of structure enhancement layer; The material of described second transition zone is the second resin alloy, and described second resin alloy comprises the raw material of the second weather-proof barrier layer and the raw material of structure enhancement layer.Solar cell backboard provided by the invention comprises five-layer structure, be respectively the first weather-proof barrier layer, First Transition layer, structure enhancement layer, the second transition zone and the second weather-proof barrier layer, wherein First Transition layer had both comprised the component of the first weather-proof barrier layer, also comprised the component of structure enhancement layer; Second transition zone is also the component both having comprised the second weather-proof barrier layer, also comprise the component of structure enhancement layer, like this be arranged so that, between weather-proof barrier layer and structure enhancement layer, there is good compatibility, combined together in the interface of weather-proof barrier layer and structure enhancement layer, thus the peel strength that improve between each layer, and then the service life of solar cell backboard can be extended, be beneficial to its application.Experimental result shows, peel strength between the weather-proof barrier layer of solar cell backboard first provided by the invention and First Transition layer is at about 30N/cm, peel strength between First Transition layer and structure enhancement layer at about 38N/cm, far away higher than peel strength 4N/cm ~ 8N/cm that gluing formulation backboard disclosed in prior art once added.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1. a solar cell backboard, comprises the first weather-proof barrier layer, First Transition layer, structure enhancement layer, the second transition zone and the second weather-proof barrier layer that superpose setting successively;
The material of described First Transition layer is the first resin alloy, and described first resin alloy comprises the raw material of the first weather-proof barrier layer and the raw material of structure enhancement layer;
The material of described second transition zone is the second resin alloy, and described second resin alloy comprises the raw material of the second weather-proof barrier layer and the raw material of structure enhancement layer;
Described structure enhancement layer comprises the component of following weight portion:
The acrylic resin of 50 parts ~ 100 parts;
Be not more than the mylar of 50 parts;
Be not more than the antioxidant of 5 parts.
2. solar cell backboard according to claim 1, is characterized in that, the thickness of described first weather-proof barrier layer is 20 μm ~ 40 μm;
The thickness of described second weather-proof barrier layer is 20 μm ~ 40 μm;
The thickness of described First Transition layer is 5 μm ~ 40 μm;
The thickness of described second transition zone is 5 μm ~ 40 μm;
The thickness of described structure enhancement layer is 100 μm ~ 400 μm.
3. solar cell backboard according to claim 1, is characterized in that, described first weather-proof barrier layer comprises the component of following weight portion:
The fluororesin of 50 parts ~ 100 parts;
The acrylic resin of 1 part ~ 50 parts;
The inorganic filler of 1 part ~ 20 parts;
The antioxidant of 0.5 part ~ 5 parts;
The ultra-violet absorber of 0.1 part ~ 2 parts.
4. solar cell backboard according to claim 1, is characterized in that, described first weather-proof barrier layer is identical with the composition of the second weather-proof barrier layer.
5. solar cell backboard according to claim 3, is characterized in that, described fluororesin is one or more in the rare TFE copolymer of polyvinyl fluoride, Kynoar, polytetrafluoroethylene (PTFE) and second.
6. solar cell backboard according to claim 3, is characterized in that, described inorganic filler be in titanium dioxide, silica, barium sulfate, aluminium oxide and calcium carbonate one or more.
7. solar cell backboard according to claim 1, is characterized in that, described acrylic resin is alkyl methacrylate;
Described mylar is one or more in PETG, PTT, polybutylene terephthalate (PBT) and PEN.
8. solar cell backboard according to claim 3, it is characterized in that, described ultra-violet absorber is independently selected from one or more in Benzotriazole Ultraviolet Stabilizer, benzophenone ultraviolet absorbent, benzylidene malonate class ultra-violet absorber and quinazoline ditosylate salt ultra-violet absorber.
9. solar cell backboard according to claim 3, is characterized in that, described acrylic resin is independently selected from alkyl methacrylate.
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| CN201310073074.3A CN103144390B (en) | 2013-03-07 | 2013-03-07 | A kind of solar cell backboard |
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| FR3011552B1 (en) * | 2013-10-09 | 2016-10-07 | Arkema France | FLUORINATED COMPOSITION CONTAINING UV ABSORBER AND USE THEREOF AS TRANSPARENT PROTECTIVE LAYER |
| CN104647813B (en) * | 2014-08-09 | 2018-01-23 | 廖张洁 | Graded polymer materials |
| CN105161560A (en) * | 2015-10-10 | 2015-12-16 | 苏州尚善新材料科技有限公司 | Solar cell insulating sheet |
| CN105619980B (en) * | 2015-12-18 | 2017-09-29 | 杭州福斯特应用材料股份有限公司 | A kind of crystalline silicon photovoltaic module encapsulation wet backboard of high insulation resistance |
| CN110690307B (en) * | 2019-10-30 | 2022-09-09 | 杭州福斯特应用材料股份有限公司 | Transparent back plate for photovoltaic module and preparation method thereof |
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| CN201629341U (en) * | 2010-01-27 | 2010-11-10 | 上海海优威电子技术有限公司 | Solar battery back panel |
| CN101916789B (en) * | 2010-07-07 | 2012-01-11 | 李民 | Backboard of solar battery with seven-layer structure |
| JP5613093B2 (en) * | 2011-03-28 | 2014-10-22 | 富士フイルム株式会社 | Film, solar cell backsheet, and film production method |
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Effective date of registration: 20161024 Address after: 401220 Changshou District of Chongqing economic and Technological Development Zone United Road No. 22 Patentee after: Chongqing Yuntianhua hanen New Material Development Co Ltd Patentee after: Yutianhua Co., Ltd., Yunnan Address before: 657800 Zhaotong City, Yunnan province Shuifu county to jingjiaba Yunnan Yuntianhua Limited by Share Ltd Patentee before: Yutianhua Co., Ltd., Yunnan |