CN103057223A - Polyamide backplane for solar energy assembly - Google Patents
Polyamide backplane for solar energy assembly Download PDFInfo
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- CN103057223A CN103057223A CN2012105827045A CN201210582704A CN103057223A CN 103057223 A CN103057223 A CN 103057223A CN 2012105827045 A CN2012105827045 A CN 2012105827045A CN 201210582704 A CN201210582704 A CN 201210582704A CN 103057223 A CN103057223 A CN 103057223A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a polyamide backplane for a solar energy assembly. The polyamide backplane comprises an inner surface layer, a core layer, and an outer surface layer from the inside to the outside, wherein by mass, the ratio of inner surface layer to the core layer to the outer surface layer is 10-20:60-80:10-20. The inner surface layer and the outer surface layer are made from a polyamide resin, fillers and additives; the core layer is made from a modified polyamide resin composition; and the modified polyamide resin composition comprises a polyamide resin, grafted polyethylene, a polypropylene resin, fillers and additives. The novel polyamide backplane of the present invention is prepared by using coextrusion technology, the final product obtained has excellent adhesion and interlayer peeling force, anti-aging, particularly anti-damp and heat aging performance, and also has low saturation water absorption, low water vapor transmission and excellent electrical insulating properties, and is easy in preparation and low in cost, suitable for industrial production.
Description
Technical field
The present invention relates to a kind of solar module polymer backboard, be specifically related to a kind of polyamide solar energy backboard and preparation method thereof, belong to solar module manufacturing technology field.
Background technology
Human present main energy sources is from fossil energy, but the time in following about 100 years, fossil energy was understood approach exhaustion, and in the process of using fossil energy, can discharge a large amount of carbon dioxide, causes the deterioration of terrestrial climate.The green regenerative energy sources of non-environmental-pollution is the unique channel that solves human energy challenge and low-carbon emission.Compare with other new forms of energy because have that resource is the abundantest, Conversion of Energy is the most direct and clean environment firendly, without the advantage of fuel, zero-emission, solar energy becomes simple, the most reliable, the most most economical new forms of energy of use.
The solar cell power generation technology mainly comprises crystal silicon solar energy battery and thin-film solar cells; no matter be which kind of solar cell; all need to be prepared into solar module, semi-conductive battery is effectively protected and encapsulated, generating that could be permanently effective.The solar energy backboard is the structural encapsulating material of solar module, for having played very large effect the service life that prolongs solar cell, be the indispensable part of solar module, the material of preparation backboard should have reliable insulating properties, water preventing ability, mechanical performance, resistance to UV aging and wet and heat ageing resistant performance.
In the conventional art, the making of solar energy backboard is take polyester film as base material film, and both sides apply or the complex protection membrane material is main, complicated process of preparation, and resulting product exists that adhesive strength is low, coating cracking, loss of properties on aging and high in cost of production problem.
Polyamide since with EVA(ethylene-vinyl acetate copolymer as encapsulating material) glued membrane and good cementability is arranged as the silica gel of filling sealing usefulness, have simultaneously higher hot strength, impact strength and good wear-resisting, self-lubricating property, and be expected to become important back veneer material, obtain in recent years researcher's concern.International Patent Application WO 2008/138021A2 discloses and has utilized polytype polyamide to replace polyester as the material that is used in the photovoltaic module backboard, comprising: polycaprolactam PA6, polyhexamethylene adipamide PA66, nylon 9 PA9, polycaprinlactam PA10, nylon 11 PA11, nylon 12 PA12, polynonamethylene adipamide PA69, polyhexamethylene sebacamide PA610, poly-12 acyl hexamethylene diamine PA612, amorphous polyamides PA6-3-T, poly-to () phthalic acid hexamethylene diamine PA6I and polyphthalamide PPA.
But polyamide material is owing to the architectural feature that contains amide group in the molecular chain-end has higher hygroscopicity, so the polyamide of non-modified is difficult to overcome the water absorption rate height, the defective that wet-hot aging performance is poor, can not satisfy solar module to the barrier requirement of backboard, and then limit the application of polyamide as back veneer material.
On the other hand, coextrusion technology is with two or two above screw extruders are extruded multiple polymers simultaneously and the one-step method process of moulding multi-layer plate-type or laminated structure etc. in a head, it has avoided traditional high cost and complicated lamination or coating process, can easily be shaped to thin layer or superthin layer with property, also can easily various additives such as antioxidant etc. be added the people to any one deck of needs, thereby its to have a production cost low, technique is simple, energy consumption is low, production efficiency is high, the characteristics such as the goods kind is many, being particularly suitable for producing the laminated film goods, is one of the most promising forming technique of present multilayer composite product.
Summary of the invention
The purpose of this invention is to provide a kind of polyamide solar energy backboard, wet and heat ageing resistant, cementability and mechanical performance that it has low hygroscopicity, excellence are suitable for the application of solar module.
For achieving the above object, the technical solution used in the present invention is: a kind of polyamide solar energy backboard, comprise from inside to outside endosexine, sandwich layer and extexine, and the mass ratio of described endosexine, sandwich layer and extexine is 10 ~ 20:60 ~ 80:10 ~ 20;
Wherein, described endosexine is made by polyamide, filler and additive; Described additive is selected from one or more in antioxidant, ultraviolet absorber and the light stabilizer;
Described extexine is made by polyamide, filler and additive; Described additive is selected from one or more in antioxidant, ultraviolet absorber and the light stabilizer;
Described sandwich layer is made by the modified polyamide resin composition;
Described modified polyamide resin composition in mass parts, comprises following component:
5 ~ 75 parts of polyamides
5 ~ 75 parts of acrylic resins
5 ~ 50 parts of grafted polyethylenes
0 ~ 100 part of filler
0.1 ~ 1.5 part of additive
Described additive is selected from one or more in antioxidant, ultraviolet absorber and the light stabilizer; Described acrylic resin is HOPP resin, COPP resin or both mixtures;
Described grafted polyethylene is prepared by graft reaction by following component:
100 parts of polyvinyl resins
0.5 ~ 2.0 part of grafting agent
0.03 ~ 0.2 part of initator
Wherein, described polyvinyl resin is homopolymerisation polyethylene, polyethylene copolymer or both mixtures.
In the technique scheme, the DSC fusing point of described polyamide is 170 ~ 260 ℃.
In the technique scheme, the DSC fusing point of described acrylic resin is 160 ~ 168 ℃, and melt flow rate (MFR) is 1 ~ 2 g/10min.
In the technique scheme, the DSC fusing point of described polyvinyl resin is 120 ~ 135 ℃, and melt flow rate (MFR) is 1 ~ 2 g/10min.
In the technique scheme, described grafting agent is selected from a kind of in acrylic acid, acrylate, maleic acid, maleic anhydride or the methine succinic acid.
In the technique scheme, described initator is di-tert-butyl peroxide (DTBP) or cumyl peroxide (DCP).
In the technique scheme, described filler is glass fibre, carbon fiber, talcum powder, mica, wollastonite or titanium dioxide.
The present invention asks for protection the preparation method of above-mentioned polyamide solar energy backboard simultaneously, comprises the steps:
(1) preparation of grafted polyethylene: by said ratio polyvinyl resin, grafting agent and initator are mixed, melt extrude processing through screw rod, prepare grafted polyethylene;
(2) preparation of modified polyamide resin composition: join polyamide, acrylic resin and the filler of remainder in the above-mentioned grafted polyethylene and mix by proportioning, through the screw rod melt-processed, can obtain described modified polyamide resin composition;
(3) preparation of modified polyamide solar energy backboard: the material that will prepare endosexine, sandwich layer and extexine by proportioning joins respectively in three-layer co-extruded A screw rod, B screw rod and the C screw rod that goes out the sheet material unit, melt extrude at screw extruder simultaneously, through curtain coating, cooling, draw, batch and namely obtain described solar energy backboard.
In the technique scheme, the reaction extrusion temperature that the screw rod in the described step (1) melt extrudes processing is 160 ~ 220 ℃; Screw speed is controlled to be 95 ~ 105 rev/mins; The reaction extrusion temperature that screw rod in described step (2) and the step (3) melt extrudes processing is 180 ~ 240 ℃; Screw speed is controlled to be 95 ~ 105 rev/mins.
The additive that the present invention adopts mainly comprises antioxidant, ultraviolet absorber and light stabilizer.
Antioxidant can suppress the thermo-oxidative ageing of polymer effectively.The present invention is not particularly limited the kind of antioxidant.The antioxidant such as hindered phenol type, phosphite type and thioesters type can be as antioxidant of the present invention, preferred antioxidant is four [(3 ', 5 '-di-t-butyl-4 '-hydroxy phenyl) propionic acid] pentaerythritol ester and tricresyl phosphite (2,4-di-tert-butyl-phenyl) ester.
The present invention is not particularly limited for the kind of ultraviolet absorber and light stabilizer.Preferred ultraviolet absorber is UV-531, and preferred light stabilizer is two (2,2,6,6-tetramethyl-4-piperidyl) sebacates.Further preferred, light stabilizer cooperates ultraviolet absorber to use together, can play the single use UV absorbers optimum efficiency that is beyond one's reach, and effectively prevents xanthochromia and the rational loss of energy of blocker of material, suppress or weaken photodegradation, improve light aging resisting property.
Acrylic resin has high strength, high-fire resistance, higher wearability, stress cracking resistance and low creep properties and excellent dielectric properties and owing to do not have polar functional group in the molecular chain-end of propylene, therefore water absorption rate is extremely low, can satisfy the ageing-resistant performance requirement of solar module.Grafted polyethylene both can be used as the end-capping reagent of polyamide, can be used as again the compatilizer of polyamide and acrylic resin, made modified polyamide resin obtain excellent weather resisteant and wet and heat ageing resistant performance.
Principle of the present invention is: cause the high amide groups group of polyamide water absorption rate to have high activity, can by with the reaction of this group to the polyamide modification, thereby adapt to various application needs with the performance of improving polyamide.The present invention adopts grafting agent, obtains grafted polyethylene with polyethylene generation graft reaction under the effect of initator; Grafted polyethylene is as reactant and polyamide generation end capping reaction, namely realized end-blocking to the moisture absorption group by the chemical reaction of amide group in the polar monomer in the grafted polyethylene and the polyamide, the modified polyamide resin that has good wet and heat ageing resistant performance, hangs down the electrical insulating property of saturated water absorption and excellence is provided, and by this resin manufacture be used for the backboard base material film of solar components, and prepared polyamide solar energy backboard with the ectonexine polyamide resin by the coextrusion mode.
Among the present invention, the endosexine contacts with EVA glued membrane in the solar module, and extexine is positioned at the outside of solar module.
Because the employing of technique scheme, compared with prior art, the present invention has following advantage:
1. the present invention has developed a kind of new Amilan polyamide resin composition, water absorbing properties and the wet-hot aging performance of polyamide have been improved as end-capping reagent and compatilizer by grafted polyethylene, grafted polyethylene has improved the compatibility of polyamide and acrylic resin as compatilizer simultaneously, and utilizes described composition to prepare coextrusion polyamide solar energy backboard.
2. the solar energy backboard by modified polyamide resin composition disclosed by the invention preparation is when having good cementability, splitting power, also have ageing-resistant, especially the performance of wet and heat ageing resistant, have simultaneously low saturated water absorption, low-temperature impact resistance, low moisture-vapor transmission and excellent electrical insulating property, can be used for making solar module.
3. rheological characteristic and the process choice of used interior, the core of the present invention, outer material are consistent, are conducive to coextrusion production, and required preparation method is simple, cost is low, be suitable for applying.
The specific embodiment
The invention will be further described below in conjunction with embodiment:
Embodiment one:
A kind of polyamide solar energy backboard, its preparation method is as follows:
(1) preparation of grafted polyethylene PE-MA
With 100 parts of (mass parts) LLDPE7042(Beijing Yanshan Petrochemical Companies), 1 part of maleic anhydride (chemical reagent, analyze pure), 0.05 part of DCP initator (Beijing Chemical Research Institute) mixes after measuring respectively, (screw diameter is 75 millimeters to melt extrude granulation in the input double screw extruder, draw ratio 33, extruder temperature is controlled at 160-220 ℃, screw speed is controlled to be 100 rev/mins, and the time of staying of material in screw rod is 2-4 minute); Cooling and dicing obtains graininess grafted polyethylene PE-MA, and its 190 ℃/2.16 kilograms melt flow rate (MFR) is 0.5g/10min.
Described LLDPE7042(Beijing Yanshan Petrochemical Company) be LLDPE, its DSC fusing point is 125 ℃, melt flow rate (MFR) 2g/10min(190 ℃, 2.16 kilogram), number-average molecular weight 17000, weight average molecular weight 100000, hot strength 12MPa, elongation at break 500%;
(2) preparation of core material (modified polyamide resin composition)
25 parts of poly-12 carbon, two acyl hexamethylene diamines (PA612) (ShanDong DongChen Engineering Plastic Co., Ltd.) are added in the driers 80 ℃ of dryings 4 hours; Then dropping into height stirs in the machine, add 75 parts of block copolymerization polypropylene K8303(Beijing Yanshan Petrochemical Companies), 5 parts of grafted polyethylene PE-MA, 0.2 part antioxidant four [(3 ', 5 '-di-t-butyl-4 '-hydroxy phenyl) propionic acid] pentaerythritol ester (Beijing addition auxiliary agent research institute, KY1010), 0.2 part UV absorbers UV-531 (Beijing addition auxiliary agent research institute, GW531), 0.1 part light stabilizer two (2,2,6,6-tetramethyl-4-piperidyl) sebacate (Beijing addition auxiliary agent research institute, GW480), stirred 30 minutes, 600 rev/mins of rotating speeds, mixing of materials is even; To melt extrude granulation in the above-mentioned material input double screw extruder; Material is finished product after the cooling and dicing drying.
Twin-screw adopts vented screw, and screw diameter is 75 millimeters, draw ratio 33, and extruder temperature is controlled at 180-240 ℃, and screw speed is controlled to be 100 rev/mins, and the time of staying of material in screw rod is 2-4 minute.
Described polypropylene K8303 is the block copolymerization polypropylene product that Beijing Yanshan Petrochemical Company produces, 163 ℃ of its DSC melt temperatures, melt flow rate (MFR) 2g/10min(230 ℃, 2.16 kilograms), number-average molecular weight 29000, weight average molecular weight 38000, tensile yield strength 22MPa, elongation at break 22%, Rockwell hardness 75R, being 480J/M during 23 ℃ of cantilever beam impact strengths, is 40J/M in the time of-20 ℃;
(3) preparation of solar energy backboard
100 parts of poly-12 carbon, two acyl hexamethylene diamines (PA612) are added in the drier, 80 ℃ of dryings drop into height and stir in the machine after 4 hours, add 20 parts of rutile type titanium white R960,0.2 part of antioxidant four [(3 ', 5 '-di-t-butyl-4 '-hydroxy phenyl) propionic acid] pentaerythritol ester, 0.2 part of UV absorbers UV-531,0.1 part of light stabilizer two (2,2,6,6-tetramethyl-4-piperidyl) sebacate, stirred 30 minutes, 600 rev/mins of rotating speeds, mixing of materials is even; Then above-mentioned material is dropped into the three-layer co-extruded A screw rod that goes out the sheet material unit, screw diameter is 60 millimeters, draw ratio 33;
The finished product core material of 100 parts of above-mentioned preparations is added in the drier, and 80 ℃ of dryings drop into the three-layer co-extruded B screw rod that goes out the sheet material unit after 4 hours, and screw diameter is 90 millimeters, draw ratio 33;
100 parts of poly-12 carbon, two acyl hexamethylene diamines (PA612) are added in the drier, 80 ℃ of dryings drop into height and stir in the machine after 4 hours, add 20 parts of rutile type titanium white R960,0.2 part of antioxidant four [(3 ', 5 '-di-t-butyl-4 '-hydroxy phenyl) propionic acid] pentaerythritol ester, 0.2 part of UV absorbers UV-531,0.1 part of light stabilizer two (2,2,6,6-tetramethyl-4-piperidyl) sebacate, stirred 30 minutes, 600 rev/mins of rotating speeds, mixing of materials is even; Then above-mentioned material is dropped into the three-layer co-extruded C screw rod that goes out the sheet material unit, screw diameter is 60 millimeters, draw ratio 33;
Three kinds of materials are melt extruded at screw extruder simultaneously, and extruder temperature is controlled at 180-240 ℃, and screw speed is controlled to be 100 rev/mins, and the time of staying of material in screw rod is 2-4 minute.Extexine, three kinds of materials of sandwich layer and endosexine distribute in distributor, and mass ratio is 20/60/20, then enters T-pattern head, and die width 1200mm obtains finished product S1 through operations such as cooling off, draw, batch.60-70 ℃ of three roller cooling water temperature, hauling speed 3-4 m/min, product thickness 0.33mm, width 1000mm, testing result sees Table 1.
Embodiment two:
A kind of polyamide solar energy backboard, its preparation method is as follows:
(1) preparation of grafted polyethylene PE-MA: referring to embodiment one
(2) preparation of core material (modified polyamide resin composition)
20 parts of nylon 1010s (PA1010) are added in the drier, 80 ℃ of dryings drop into height and stir in the machine after 4 hours, add 80 parts of block copolymerization polypropylene K8303,40 parts of grafted polyethylene PE-MA, 30 parts of rutile type titanium white R960,0.25 part antioxidant four [(3 ', 5 '-di-t-butyl-4 '-hydroxy phenyl) propionic acid] pentaerythritol ester, 0.21 part UV absorbers UV-531,0.13 part light stabilizer two (2,2,6,6-tetramethyl-4-piperidyl) sebacate, stirred 30 minutes, 600 rev/mins of rotating speeds, mixing of materials is even; Then will melt extrude in the above-mentioned material input double screw extruder, material is finished product after the cooling and dicing drying;
Twin-screw adopts vented screw, and screw diameter is 75 millimeters, draw ratio 33, and extruder temperature is controlled at 180-240 ℃, and screw speed is controlled to be 100 rev/mins, and the time of staying of material in screw rod is 2-4 minute.
(3) preparation of solar energy backboard
100 parts of nylon 1010s (PA1010) are added in the drier 80 ℃ of dryings 4 hours; Then dropping into height stirs in the machine, add 20 parts of rutile type titanium white R960,0.2 part of antioxidant four [(3 ', 5 '-di-t-butyl-4 '-hydroxy phenyl) propionic acid] pentaerythritol ester, 0.2 part of UV absorbers UV-531,0.1 part of light stabilizer two (2,2,6,6-tetramethyl-4-piperidyl) sebacate stirred 30 minutes, 600 rev/mins of rotating speeds, mixing of materials is even; Then above-mentioned material is dropped into the three-layer co-extruded A screw rod that goes out the sheet material unit, screw diameter is 60 millimeters, draw ratio 33;
The finished product core material of 100 parts of above-mentioned preparations is added in the drier, and 80 ℃ of dryings drop into the three-layer co-extruded B screw rod that goes out the sheet material unit after 4 hours, and screw diameter is 90 millimeters, draw ratio 33;
100 parts of nylon 1010s (PA1010) are added in the drier, 80 ℃ of dryings drop into height and stir in the machine after 4 hours, add 20 parts of rutile type titanium white R960,0.2 part of antioxidant four [(3 ', 5 '-di-t-butyl-4 '-hydroxy phenyl) propionic acid] pentaerythritol ester, 0.2 part of UV absorbers UV-531,0.1 part of light stabilizer two (2,2,6,6-tetramethyl-4-piperidyl) sebacate, stirred 30 minutes, 600 rev/mins of rotating speeds, mixing of materials is even; Then above-mentioned material is dropped into the three-layer co-extruded C screw rod that goes out the sheet material unit, screw diameter is 60 millimeters, draw ratio 33;
Three kinds of materials are melt extruded at screw extruder simultaneously, and extruder temperature is controlled at 180-240 ℃, and screw speed is controlled to be 100 rev/mins, and the time of staying of material in screw rod is 2-4 minute.Extexine, three kinds of materials of sandwich layer and endosexine distribute in distributor, part by weight is 10/70/20, then enter T-pattern head (die width 1200mm), obtain finished product S2 through operations such as cooling off, draw, batch, 60-70 ℃ of three roller cooling water temperature, hauling speed 3-4 m/min, product thickness 0.33mm, width 1000mm, testing result sees Table 1.
Embodiment three:
A kind of polyamide solar energy backboard, its preparation method is as follows:
(1) preparation of grafted polyethylene PE-MA: referring to embodiment one
(2) preparation of core material (modified polyamide resin composition)
50 parts of nylon 1010s (PA1010) are added in the drier, 80 ℃ of dryings drop into height and stir in the machine after 4 hours, add 50 parts of block copolymerization polypropylene K8303 and 10 parts of grafted polyethylene PE-MA, 50 parts of rutile type titanium white R960,0.32 part antioxidant four [(3 ', 5 '-di-t-butyl-4 '-hydroxy phenyl) propionic acid] pentaerythritol ester, 0.12 part UV absorbers UV-531,0.15 part light stabilizer two (2,2,6,6-tetramethyl-4-piperidyl) sebacate, stirred 30 minutes, 600 rev/mins of rotating speeds, mixing of materials is even; Then will melt extrude in the above-mentioned material input double screw extruder, material is finished product after the cooling and dicing drying;
Twin-screw adopts vented screw, and screw diameter is 75 millimeters, draw ratio 33, and extruder temperature is controlled at 180-240 ℃, and screw speed is controlled to be 100 rev/mins, and the time of staying of material in screw rod is 2-4 minute.
(3) preparation of solar energy backboard
100 parts of nylon 1010s (PA1010) are added in the drier, 80 ℃ of dryings drop into height and stir in the machine after 4 hours, add 20 parts of rutile type titanium white R960,0.2 part of antioxidant four [(3 ', 5 '-di-t-butyl-4 '-hydroxy phenyl) propionic acid] pentaerythritol ester, 0.2 part of UV absorbers UV-531,0.1 part of light stabilizer two (2,2,6,6-tetramethyl-4-piperidyl) sebacate, stirred 30 minutes, 600 rev/mins of rotating speeds, mixing of materials is even; Then above-mentioned material is dropped into the three-layer co-extruded A screw rod that goes out the sheet material unit, screw diameter is 60 millimeters, draw ratio 33;
The finished product core material of 100 parts of above-mentioned preparations is added in the drier, and 80 ℃ of dryings drop into the three-layer co-extruded B screw rod that goes out the sheet material unit after 4 hours, and screw diameter is 90 millimeters, draw ratio 33;
100 parts of nylon 1010s (PA1010) are added in the drier, 80 ℃ of dryings drop into height and stir in the machine after 4 hours, add 20 parts of rutile type titanium white R960,0.2 part of antioxidant four [(3 ', 5 '-di-t-butyl-4 '-hydroxy phenyl) propionic acid] pentaerythritol ester, 0.2 part of UV absorbers UV-531,0.1 part of light stabilizer two (2,2,6,6-tetramethyl-4-piperidyl) sebacate, stirred 30 minutes, 600 rev/mins of rotating speeds, mixing of materials is even; Then above-mentioned material is dropped into the three-layer co-extruded C screw rod that goes out the sheet material unit, screw diameter is 60 millimeters, draw ratio 33.
Three kinds of materials are melt extruded at screw extruder simultaneously, and extruder temperature is controlled at 180-240 ℃, and screw speed is controlled to be 100 rev/mins, and the time of staying of material in screw rod is 2-4 minute.Extexine, three kinds of materials of sandwich layer and endosexine distribute in distributor, and mass ratio is 20/70/10, then enters T-pattern head, and die width 1200mm obtains finished product S3 through operations such as cooling off, draw, batch.60-70 ℃ of three roller cooling water temperature, hauling speed 3-4 m/min, product thickness 0.33mm, width 1000mm, testing result sees Table 1.
Comparative Examples one:
Be TPT type backboard (Kunshan platform rainbow company) that product structure is PVF/PET/PVF, thickness 0.33mm is designated as B1, and testing result sees Table 1.
Comparative Examples two:
Be TPE type backboard (Japanese Japan aluminium company) that product structure is PVDF/PET/PE, thickness 0.33mm is designated as B2, and testing result sees Table 1.
Comparative Examples three:
Be FEVE type backboard (coming company in the Suzhou) that product structure is FEVE/PET/FEVE, thickness 0.30mm is designated as B3, and testing result sees Table 1.
The sign of various backboards in table 1 embodiment and the Comparative Examples
* annotate: splitting power is very large, does not measure.
From the results shown in Table 1, of the present inventionly three-layer co-extrudedly go out polyamide solar energy backboard and not only have shrinkage factor, hot air aging, the insulating properties that satisfy the requirement of solar energy backboard, also have the water absorption rate, moisture-vapor transmission, splitting and the wet and heat ageing resistant performance that are better than other backboards, can be for the preparation of solar module.
Characterizing method in the various embodiments described above and the Comparative Examples adopts following standard:
The standard method of test of melt flow rate (MFR) ASTM D1238 thermoplastic melt flow rate (MFR);
The standard test method of hot strength ASTM D638 plastic tensile performance;
The standard test method of elongation at break ASTM D638 plastic tensile performance;
Bending strength ASTM D790 does not strengthen testing with the reinforced plastics bending property;
Simply supported beam notched Izod impact strength ASTM D6110 plastics notched specimen impulse withstand test method;
The method of testing of the impact resistance of cantilever beam notched Izod impact strength ASTM D256 plastics and electrically insulating material;
The shrinkage factor GB/T 13541 electric plastic sheeting test methods of using
Saturated water absorption GB/T 1034 plastic ink absorption test methods
The mensuration of moisture-vapor transmission GB/T 21529 plastic sheetings and thin slice moisture-vapor transmission
Thermo-oxidative ageing GB/T7141 plastic hot aging testing method
Hydrothermal aging GB/T 2423.40 electric and electronic product environmental test second portions: test method test Cx: the unsaturation high steam is constant damp and hot
Specific insulation GB/T 1410 solid insulating material specific insulations and surface resistivity test method.
Claims (10)
1. a polyamide solar energy backboard comprises endosexine, sandwich layer and extexine from inside to outside, it is characterized in that, the mass ratio of described endosexine, sandwich layer and extexine is 10 ~ 20:60 ~ 80:10 ~ 20;
Wherein, described endosexine is made by polyamide, filler and additive; Described additive is selected from one or more in antioxidant, ultraviolet absorber and the light stabilizer;
Described extexine is made by polyamide, filler and additive; Described additive is selected from one or more in antioxidant, ultraviolet absorber and the light stabilizer;
Described sandwich layer is made by the modified polyamide resin composition;
Described modified polyamide resin composition in mass parts, comprises following component:
5 ~ 75 parts of polyamides
5 ~ 75 parts of acrylic resins
5 ~ 50 parts of grafted polyethylenes
0 ~ 100 part of filler
0.1 ~ 1.5 part of additive
Described additive is selected from one or more in antioxidant, ultraviolet absorber and the light stabilizer; Described acrylic resin is HOPP resin, COPP resin or both mixtures;
Described grafted polyethylene is prepared by graft reaction by following component:
100 parts of polyvinyl resins
0.5 ~ 2.0 part of grafting agent
0.03 ~ 0.2 part of initator
Wherein, described polyvinyl resin is homopolymerisation polyethylene, polyethylene copolymer or both mixtures.
2. solar energy backboard according to claim 1, it is characterized in that: the DSC fusing point of described polyamide is 170 ~ 260 ℃.
3. solar energy backboard according to claim 1, it is characterized in that: the DSC fusing point of described acrylic resin is 160 ~ 168 ℃, melt flow rate (MFR) is 1 ~ 2 g/10min.
4. solar energy backboard according to claim 1, it is characterized in that: the DSC fusing point of described polyvinyl resin is 120 ~ 135 ℃, melt flow rate (MFR) is 1 ~ 2 g/10min.
5. solar energy backboard according to claim 1 is characterized in that: described grafting agent is selected from a kind of in acrylic acid, acrylate, maleic acid, maleic anhydride or the methine succinic acid.
6. solar energy backboard according to claim 1, it is characterized in that: described initator is di-tert-butyl peroxide or cumyl peroxide.
7. solar energy backboard according to claim 1, it is characterized in that: described filler is glass fibre, carbon fiber, talcum powder, mica, wollastonite or titanium dioxide.
8. a method for preparing solar energy backboard as claimed in claim 1 is characterized in that, comprises the steps:
(1) preparation of grafted polyethylene: by proportioning claimed in claim 1 polyvinyl resin, grafting agent and initator are mixed, melt extrude processing through screw rod, prepare grafted polyethylene;
(2) preparation of modified polyamide resin composition: join remaining component in the above-mentioned grafted polyethylene and mix by proportioning, through the screw rod melt-processed, can obtain described modified polyamide resin composition;
(3) preparation of modified polyamide solar energy backboard: the material that will prepare endosexine, sandwich layer and extexine by proportioning joins respectively in three-layer co-extruded A screw rod, B screw rod and the C screw rod that goes out the sheet material unit, melt extrude at screw extruder simultaneously, through curtain coating, cooling, draw, batch and namely obtain described solar energy backboard.
9. preparation method according to claim 8, it is characterized in that: the reaction extrusion temperature that the screw rod in the described step (1) melt extrudes processing is 160 ~ 220 ℃; Screw speed is controlled to be 95 ~ 105 rev/mins.
10. preparation method according to claim 8, it is characterized in that: the reaction extrusion temperature that the screw rod in described step (2) and the step (3) melt extrudes processing is 180 ~ 240 ℃; Screw speed is controlled to be 95 ~ 105 rev/mins.
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| WO2017181655A1 (en) * | 2016-04-18 | 2017-10-26 | 苏州赛伍应用技术有限公司 | Co-extruded one-time formed backplate having three-layer structure for solar cell module |
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| WO2018033006A1 (en) * | 2016-08-18 | 2018-02-22 | 苏州度辰新材料有限公司 | Extruded solar power back panel and manufacturing method thereof |
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