CN114805868A - Polyolefin fiber reinforced layer and application thereof in solar cell adhesive film - Google Patents
Polyolefin fiber reinforced layer and application thereof in solar cell adhesive film Download PDFInfo
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- CN114805868A CN114805868A CN202210355522.8A CN202210355522A CN114805868A CN 114805868 A CN114805868 A CN 114805868A CN 202210355522 A CN202210355522 A CN 202210355522A CN 114805868 A CN114805868 A CN 114805868A
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- adhesive film
- polyolefin
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- 239000002313 adhesive film Substances 0.000 title claims abstract description 138
- 239000000835 fiber Substances 0.000 title claims abstract description 107
- 229920000098 polyolefin Polymers 0.000 title claims abstract description 89
- 230000004956 cell adhesive effect Effects 0.000 title claims abstract description 38
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 66
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 66
- 239000000203 mixture Substances 0.000 claims abstract description 43
- 239000000155 melt Substances 0.000 claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 36
- 238000001816 cooling Methods 0.000 claims abstract description 21
- 238000002360 preparation method Methods 0.000 claims abstract description 18
- 239000007921 spray Substances 0.000 claims abstract description 17
- 238000005507 spraying Methods 0.000 claims abstract description 17
- 238000009987 spinning Methods 0.000 claims abstract description 16
- 238000007493 shaping process Methods 0.000 claims abstract description 13
- 229920000089 Cyclic olefin copolymer Polymers 0.000 claims description 29
- 239000002994 raw material Substances 0.000 claims description 27
- 239000004698 Polyethylene Substances 0.000 claims description 20
- 239000003963 antioxidant agent Substances 0.000 claims description 19
- 230000003078 antioxidant effect Effects 0.000 claims description 18
- 238000003825 pressing Methods 0.000 claims description 17
- 238000004132 cross linking Methods 0.000 claims description 16
- 239000007822 coupling agent Substances 0.000 claims description 14
- -1 polyethylene Polymers 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 13
- 229920000573 polyethylene Polymers 0.000 claims description 10
- 238000005266 casting Methods 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims description 7
- 229920001577 copolymer Polymers 0.000 claims description 6
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 claims description 2
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 claims description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 120
- 239000002904 solvent Substances 0.000 description 17
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 16
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 description 16
- 235000010354 butylated hydroxytoluene Nutrition 0.000 description 16
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 15
- 239000000243 solution Substances 0.000 description 12
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 10
- OKKRPWIIYQTPQF-UHFFFAOYSA-N Trimethylolpropane trimethacrylate Chemical compound CC(=C)C(=O)OCC(CC)(COC(=O)C(C)=C)COC(=O)C(C)=C OKKRPWIIYQTPQF-UHFFFAOYSA-N 0.000 description 10
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 description 10
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 10
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 10
- 239000003795 chemical substances by application Substances 0.000 description 9
- 230000001737 promoting effect Effects 0.000 description 9
- 229920010741 Ultra High Molecular Weight Polyethylene (UHMWPE) Polymers 0.000 description 6
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 6
- 230000032683 aging Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 6
- 239000012790 adhesive layer Substances 0.000 description 5
- 229920006351 engineering plastic Polymers 0.000 description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-M hydroperoxide group Chemical group [O-]O MHAJPDPJQMAIIY-UHFFFAOYSA-M 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000003292 glue Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 230000006750 UV protection Effects 0.000 description 1
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 150000002432 hydroperoxides Chemical class 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 150000007530 organic bases Chemical class 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/046—Reinforcing macromolecular compounds with loose or coherent fibrous material with synthetic macromolecular fibrous material
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
- C09J123/04—Homopolymers or copolymers of ethene
- C09J123/08—Copolymers of ethene
- C09J123/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C09J123/0853—Vinylacetate
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/24—Plastics; Metallised plastics based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/241—Polyolefin, e.g.rubber
- C09J7/243—Ethylene or propylene polymers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/048—Encapsulation of modules
- H01L31/0481—Encapsulation of modules characterised by the composition of the encapsulation material
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/08—Copolymers of ethene
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/322—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of solar panels
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
- C09J2301/124—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2423/00—Presence of polyolefin
- C09J2423/04—Presence of homo or copolymers of ethene
- C09J2423/046—Presence of homo or copolymers of ethene in the substrate
Abstract
The invention relates to the technical field of IPC 08, in particular to a polyolefin fiber reinforced layer and application thereof in a solar cell adhesive film. The preparation process of the polyolefin fiber reinforced layer comprises the following steps: step 1, carrying out molten state treatment on an ethylene-vinyl acetate copolymer to obtain a melt; step 2, carrying out high-temperature treatment on the polyolefin base material to obtain a fiber spinning solution; step 3, spraying the fiber spinning solution through a spray head to form fiber yarns, and spraying the fiber yarns into the melt obtained in the step 1 to obtain a mixture; and 4, cooling the mixture, and carrying out traction shaping to obtain the polyolefin fiber reinforced layer. The application creatively applies the ultra-high molecular weight PE enhancement layer to the photovoltaic adhesive film, obviously improves the mechanical strength and the environment resistance of the photovoltaic adhesive film, adopts a specific preparation process to optimize the PE fiber layer structure, gives the photovoltaic adhesive film an extremely low deformation trend, and has the characteristics of high strength and low warpage.
Description
Technical Field
The invention relates to the technical field of IPC 08, in particular to a polyolefin fiber reinforced layer and application thereof in a solar cell adhesive film.
Background
The existing photovoltaic adhesive film has low mechanical strength and poor aging resistance, and cannot meet the use requirement in a severe environment; under the conditions of UV, high humidity and the like, the bonding effect of the adhesive layer and the photovoltaic module is very easy to lose effectiveness, and the adhesive layer is easy to have the problems of delamination, cracking, stickiness, yellowing and the like, so that the normal use of the photovoltaic module is influenced. Although the mechanical property of the photovoltaic adhesive film can be improved by adding the rigid inorganic material, the compatibility of the rigid material and the organic base material of the adhesive film is poor, the dimensional stability of the adhesive film cannot be maintained, and the service life of the photovoltaic module is still limited.
Chinese patent CN202011015244.9 discloses a photovoltaic adhesive film resistant to mechanical impact and a preparation method thereof, wherein the photovoltaic adhesive film is prepared by adopting 0.1-45% of elastomer resin system, 20-95% of hot-melt thermosetting resin system and 0.1-5% of glass fiber as basic materials, and the mechanical impact resistance of the photovoltaic adhesive film is improved. However, the glass fiber adopted in the prior art has limited compatibility with an elastomer resin system, and the problem of glue failure still occurs in a high-temperature and high-humidity environment. Chinese patent CN201910185409.8 discloses a three-layer composite high-reliability high-efficiency gain EVA photovoltaic adhesive film and a preparation method thereof, wherein the three-layer composite high-reliability high-efficiency gain EVA photovoltaic adhesive film is formed by an upper transparent EVA layer, a middle white reflective EVA layer and a lower transparent EVA layer, the thickness of each layer is controlled, and the photovoltaic adhesive film with a high reflective structure is obtained through radiation crosslinking, so that the diffuse reflection effect of a cell piece reflective optical fiber is improved; however, the photovoltaic adhesive film still has the technical problems that the mechanical property is poor and the optical function cannot be fully exerted.
The application of the ultra-high molecular weight polyethylene as a novel reinforcing material in photovoltaic modules is rarely reported. The application creatively applies the ultra-high molecular weight PE enhancement layer to the photovoltaic adhesive film, obviously improves the mechanical strength and the environment resistance of the photovoltaic adhesive film, adopts a specific preparation process to optimize the PE fiber layer structure, gives the photovoltaic adhesive film an extremely low deformation trend, and has the characteristics of high strength and low warpage.
Disclosure of Invention
According to the invention, the polyolefin fiber reinforced layer is provided, so that the problems of poor mechanical property, low peeling strength and poor aging resistance of the photovoltaic adhesive film in the prior art are solved, and the strength and reliability of the solar cell adhesive film are improved.
The invention provides a polyolefin fiber reinforced layer in a first aspect, and the preparation process of the polyolefin fiber reinforced layer comprises the following steps:
step 1, carrying out molten state treatment on an ethylene-vinyl acetate copolymer to obtain a melt;
step 2, carrying out high-temperature treatment on the polyolefin base material to obtain a fiber spinning solution;
step 3, spraying the fiber spinning solution through a spray head to form fiber yarns, and spraying the fiber yarns into the melt obtained in the step 1 to obtain a mixture;
and 4, cooling the mixture, and carrying out traction shaping to obtain the polyolefin fiber reinforced layer.
In some preferred embodiments, the molten state treatment in step 1 is specifically to melt and plasticize the ethylene-vinyl acetate copolymer at the temperature of 100 ℃ and 150 ℃ to obtain a melt.
In some preferred embodiments, the temperature of the high-temperature treatment in the step 2 is 160-350 ℃; more preferably, in the step 2, the solvent oil is added when the polyolefin base stock is subjected to high-temperature treatment, and the weight ratio of the polyolefin base stock to the solvent oil is (8-10): (0.5-2).
In some preferred embodiments, the mineral spirit has a viscosity of < 30mm 2 /s(40℃)。
In some preferred embodiments, in step 3, the spray heads are configured such that a plurality of spray heads arranged in parallel work simultaneously.
In some preferred embodiments, the length of the air jet section of the filaments in step 3 is 4 to 16 cm.
The length of the air jet section is the vertical height difference between a reaction device for containing melt and a spray head.
In some preferred embodiments, in the step 4, the temperature of the temperature reduction operation is 50-90 ℃, and the drawing multiple of the drawing operation is 5-20 times.
In some preferred embodiments, the polyolefin base comprises a combination of one or more of polyethylene, polypropylene, poly-1-butene, poly-4-methyl-1-pentene.
Further preferably, the polyolefin base is polyethylene and/or polypropylene.
In some preferred embodiments, the polyethylene comprises at least one of high pressure low density polyethylene, low pressure high density polyethylene, linear low density polyethylene, ultra high molecular weight polyethylene, silane grafted hydrolyzed polyethylene; further preferred is ultrahigh molecular weight polyethylene (UHMWPE).
In some preferred embodiments, the ultra-high molecular weight polyethylene has a density of 0.92 to 0.98g/cm 3 The average molecular weight is 120-200 ten thousand, and the linear thermal expansion coefficient is (1-3) multiplied by 10 -4 m/(m.K)。
In some preferred embodiments, the ethylene-vinyl acetate copolymer has a melt index of 15 to 40g/10min and a VA content of 25 to 35%.
The photovoltaic adhesive film is used as a connecting medium of the photovoltaic module, and the service life of the photovoltaic module is directly influenced by the performance of the photovoltaic adhesive film. The existing photovoltaic adhesive film cannot give consideration to both mechanical strength and bonding stability, and cannot effectively play a role when being impacted by external force or in a severe outdoor environment. The application creatively adds the ultra-high molecular weight PE fiber into the enhancement layer of the photovoltaic adhesive film, so that the mechanical property of the photovoltaic adhesive film can be effectively improved; in the research process, the unidirectional ultra-high molecular weight PE fiber is directly immersed in a specific ethylene-vinyl acetate copolymer melt, so that a reinforcing layer material can be simply, conveniently and efficiently obtained, the ultra-high molecular weight PE fiber is sprayed by the EVA melt side by side die heads simultaneously to be infiltrated, and then the ultra-high molecular weight PE fiber can be directly used by injection molding after being cooled, can also be further processed and used according to downstream requirements, and can simultaneously meet the mechanical strength and the process convenience of products.
When the unidirectional ultra-high molecular weight PE fiber formed by spraying of a plurality of parallel spray heads is directly soaked in the ethylene-vinyl acetate copolymer, the performance of a finished product is greatly influenced by the dispersion uniformity of the fiber yarns, and internal fracture cracks are easy to expand when the fiber is impacted; the application further researches and discovers that the ethylene-vinyl acetate copolymer with the melt index of 15-40g/10min and the VA content of 25-35% is adopted, the infiltration effect on the ultra-high molecular weight PE fiber is optimal, the fiber filaments are uniformly dispersed in the ethylene-vinyl acetate copolymer melt, the crack growth of the unidirectional PE fiber filaments in the direction perpendicular to the gap can be greatly inhibited, the plastic deformation is effectively dispersed, and the photovoltaic adhesive film is endowed with stronger impact resistance.
The invention provides an application of a polyolefin fiber reinforced layer in a solar cell adhesive film, wherein the solar cell adhesive film is structurally characterized in that an adhesive film layer A is formed, and the polyolefin fiber reinforced layer and the adhesive film layer B are sequentially laminated.
In some preferred embodiments, the raw materials of the adhesive film layer a include: olefin copolymer mixture, crosslinking promoter, coupling agent and antioxidant.
Further preferably, the raw materials of the adhesive film layer a include: according to the weight percentage, 0.5-4% of crosslinking accelerator, 1-3% of coupling agent and 0.1-1.5% of antioxidant, and the balance is supplemented to the olefin copolymer mixture.
In some preferred embodiments, the olefin copolymer compound is at least 2 of ethylene-vinyl acetate copolymer, ethylene-octene copolymer, propylene copolymer;
further preferably, the olefin copolymer blend is EVA (ethylene-vinyl acetate copolymer) and POE (ethylene-octene copolymer); the weight ratio of EVA to POE is (2-5): 1.
the melt index of EVA in the olefin copolymer mixture is 4-10g/10min, the tensile strength is 12-24MPa, and the vinyl acetate content is 20-32 wt%; the ethylene-vinyl acetate copolymer base may be commercially available, for example, U.S. USI
UE634-04。
The POE in the olefin copolymer mixture has a melt index of 1-6g/10min and a flexural modulus of 10-35 MPa; the ethylene-octene copolymer may be commercially available, for example, as U.S. exxon mebil POE 8203.
Examples of crosslinking promoters include, but are not limited to, organic peroxides, hydroperoxides, multifunctional acrylates.
Examples of coupling agents include, but are not limited to, gamma-glycidoxypropyltrimethoxysilane.
Examples of antioxidants include, but are not limited to, pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], 2, 6-di-tert-butyl-p-cresol, n-octadecyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, tris [2, 4-di-tert-butylphenyl ] phosphite.
In some preferred embodiments, the raw material of the adhesive film layer B is the same as that of the adhesive film layer a.
In some preferred embodiments, the preparation of the solar cell adhesive film comprises:
respectively placing the raw materials of the adhesive film layer A and the adhesive film layer B in an extruder for plasticizing and casting, placing the polyolefin fiber reinforced layer between the adhesive film layer A and the adhesive film layer B, heating and laminating, cooling and rolling to obtain the solar cell adhesive film.
In some preferred embodiments, the temperature for heating and pressing is 150-.
The mechanical strength of the photovoltaic adhesive film is improved by adding the strengthening layer, but the rigidity of the ultra-high molecular weight PE fiber is strong, the adhesive layers are easy to be debonded and separated under the change of high temperature and low temperature, and the long-term use of the photovoltaic module is still limited. The research finds that the obtained adhesive film layer has the best bonding capacity with the enhancement layer, the peeling strength of the photovoltaic adhesive film and the photovoltaic module is high, and the aging resistance is excellent by adopting the action of the specific EVA/POE base material and the auxiliary agent. The method is surmised that under the condition, the migration free energy of the rigid material in the internal structure of the polymer is inhibited to the greatest extent, a stable polymer cross-linking and penetrating structure is formed, the photovoltaic adhesive film can keep lasting dimensional stability under extreme temperature fluctuation, the high mechanical strength and the low warping characteristic are considered, and the service life of the photovoltaic module is effectively prolonged.
Has the advantages that:
the invention provides a polyolefin fiber reinforced layer, which is prepared by soaking unidirectional ultrahigh molecular weight polyethylene in an ethylene-vinyl acetate copolymer base material, and has strong compatibility with an organic film layer and high mechanical strength. Especially when the density of the ultra-high molecular weight polyethylene is 0.92-0.98g/cm 3 Average molecular weightThe amount is 120-200 ten thousand, and the coefficient of linear thermal expansion is (1-3). times.10 -4 m/(m.K), the polyolefin fiber reinforced layer and the adhesive film layer have strong bonding capability, and the bonding of the composite layer can be realized by a simple process. Meanwhile, EVA and POE with specific components are matched as an olefin copolymer mixture, so that the UV resistance, the humidity resistance and the heat resistance of the solar photovoltaic adhesive film are improved, the photovoltaic adhesive film and the photovoltaic module are endowed with stable and effective combining capacity, and the working aging of the photovoltaic module is effectively prolonged.
Detailed Description
Example 1.
The embodiment provides a polyolefin fiber reinforced layer, and the preparation process of the polyolefin fiber reinforced layer comprises the following steps:
step 1, carrying out molten state treatment on an ethylene-vinyl acetate copolymer to obtain a melt;
step 2, carrying out high-temperature treatment on the polyolefin base material to obtain a fiber spinning solution;
step 3, spraying the fiber spinning solution through a spray head to form fiber yarns, and spraying the fiber yarns into the melt obtained in the step 1 to obtain a mixture;
and 4, cooling the mixture, and carrying out traction shaping to obtain the polyolefin fiber reinforced layer.
The molten state treatment in the step 1 is to melt and plasticize the ethylene-vinyl acetate copolymer at 120 ℃ to obtain a molten body.
In the step 2, the temperature of the high-temperature treatment is 220 ℃.
And 2, adding solvent oil when the polyolefin base material is subjected to high-temperature treatment, wherein the weight ratio of the polyolefin base material to the solvent oil is 9: 1.
the solvent oil is No. 5 white oil with kinematic viscosity of 5mm 2 (40 ℃) in Shanghai Bitsu Technological industries, Ltd.
In the step 3, the nozzles are arranged in a way that a plurality of nozzles which are arranged in parallel work simultaneously.
The length of the air jet section of the fiber filaments in the step 3 is 10 cm.
The length of the air jet section is the vertical height difference between a reaction device for containing melt and a spray head.
In the step 4, the temperature of the cooling operation is 80 ℃, and the drafting multiple of the traction operation is 5 times.
The polyolefin base material is polyethylene, in particular ultrahigh molecular weight polyethylene (UHMWPE).
The density of the ultra-high molecular weight polyethylene is 0.95g/cm 3 Average molecular weight of 160 ten thousand and linear thermal expansion coefficient of 2 x 10 -4 m/(m.K); from Zhang Kokono engineering plastics, Inc.
The ethylene-vinyl acetate copolymer has a melt index of 30g/10min and a VA content of 33%; in particular to an EVA product of the Japan Mitsui chemical model 150.
The weight ratio of the ethylene-vinyl acetate copolymer to the polyolefin base material is 4: 1.
in a second aspect of the present invention, an application of a polyolefin fiber reinforced layer in a solar cell adhesive film is provided, where the solar cell adhesive film has a structure of an adhesive film layer a, and as described above, the polyolefin fiber reinforced layer and the adhesive film layer B are sequentially stacked.
The glue film layer A comprises the following raw materials: according to the weight percentage, 3 percent of crosslinking promoting agent, 1.5 percent of coupling agent and 1 percent of antioxidant, and the balance of the olefin copolymer mixture is supplemented.
The olefin copolymer mixture is EVA and POE; the weight ratio of EVA to POE is 3: 1.
the melt index of EVA in the olefin copolymer mixture is 6g/10min, the tensile strength is 17.7MPa, and the vinyl acetate content is 28 wt%; in particular the USI of the United states
UE634-04。
The POE in the olefin copolymer mixture has a melt index of 3g/10min and a flexural modulus of 28 MPa; in particular to American Exxon Mobil POE 8203.
The crosslinking promoting agent is hydroperoxide and polyfunctional acrylate; the weight ratio of hydroperoxide to multifunctional acrylate is 1: 5.
the hydroperoxide is specifically tert-butyl hydroperoxide.
The multifunctional acrylate is specifically TMPTMA (trimethylolpropane trimethacrylate).
The coupling agent is gamma-glycidoxypropyltrimethoxysilane (KH-560).
The antioxidant is 2, 6-di-tert-butyl-p-cresol (antioxidant BHT) and tris [2, 4-di-tert-butylphenyl ] phosphite (antioxidant 168); the weight ratio of the 2, 6-di-tert-butyl-p-cresol to the tris [2, 4-di-tert-butylphenyl ] phosphite is 2: 1.
the raw material of the adhesive film layer B is the same as that of the adhesive film layer A.
The preparation method of the solar cell adhesive film comprises the following steps:
respectively putting the raw materials of the adhesive film layer A and the adhesive film layer B into an extruder for melting and plasticizing, and extruding and casting the raw materials to a roller through a die opening to obtain the adhesive film layer A and the adhesive film layer B; and placing the polyolefin fiber reinforced layer between the adhesive film layer A and the adhesive film layer B, heating and pressing, cooling, rolling and shaping to obtain the solar cell adhesive film.
The heating and pressing temperature is 155 ℃, and the pressing time is 30 min.
Example 2.
The embodiment provides a polyolefin fiber reinforced layer, and the preparation process of the polyolefin fiber reinforced layer comprises the following steps:
step 1, carrying out molten state treatment on an ethylene-vinyl acetate copolymer to obtain a melt;
step 2, carrying out high-temperature treatment on the polyolefin base material to obtain a fiber spinning solution;
step 3, spraying the fiber spinning solution through a spray head to form fiber yarns, and spraying the fiber yarns into the melt obtained in the step 1 to obtain a mixture;
and 4, cooling the mixture, and carrying out traction shaping to obtain the polyolefin fiber reinforced layer.
The molten state treatment in the step 1 is to melt and plasticize the ethylene-vinyl acetate copolymer at 120 ℃ to obtain a molten body.
In the step 2, the temperature of the high-temperature treatment is 220 ℃.
And 2, adding solvent oil when the polyolefin base material is subjected to high-temperature treatment, wherein the weight ratio of the polyolefin base material to the solvent oil is 8.5: 1.5.
the solvent oil is No. 7 white oil with kinematic viscosity of 7mm 2 (40 ℃) in Shanghai Bitsu Technological industries, Ltd.
In the step 3, the nozzles are arranged in a way that a plurality of nozzles which are arranged in parallel work simultaneously.
The length of the air jet section of the fiber filaments in the step 3 is 8 cm.
The length of the air jet section is the vertical height difference between a reaction device for containing melt and a spray head.
In the step 4, the temperature of the cooling operation is 80 ℃, and the drafting multiple of the traction operation is 5 times.
The polyolefin base material is polyethylene, in particular ultrahigh molecular weight polyethylene (UHMWPE).
The density of the ultra-high molecular weight polyethylene is 0.95g/cm 3 Average molecular weight of 160 ten thousand and linear thermal expansion coefficient of 2 x 10 -4 m/(m.K); from Zhang Kokono engineering plastics, Inc.
The melt index of the ethylene-vinyl acetate copolymer is 30g/10min, and the VA content is 33%; in particular to an EVA product of the Japan Mitsui chemical model 150.
The weight ratio of the ethylene-vinyl acetate copolymer to the polyolefin base material is 4: 1.
in a second aspect of the present invention, an application of a polyolefin fiber reinforced layer in a solar cell adhesive film is provided, where the solar cell adhesive film has a structure of an adhesive layer a, and the polyolefin fiber reinforced layer and the adhesive layer B are sequentially stacked as described above.
The glue film layer A comprises the following raw materials: according to the weight percentage, 3 percent of crosslinking promoting agent, 1.5 percent of coupling agent and 1 percent of antioxidant, and the balance of the olefin copolymer mixture is supplemented.
The olefin copolymer mixture is EVA and POE; the weight ratio of EVA to POE is 3: 1.
melting of EVA in the olefin copolymer blendThe melt index is 6g/10min, the tensile strength is 17.7MPa, and the vinyl acetate content is 28 wt%; in particular the United states
UE634-04。
The POE in the olefin copolymer mixture has a melt index of 3g/10min and a flexural modulus of 28 MPa; in particular to American Exxon Mobil POE 8203.
The crosslinking promoting agent is hydroperoxide and polyfunctional acrylate; the weight ratio of hydroperoxide to multifunctional acrylate is 1: 5.
the hydroperoxide is specifically tert-butyl hydroperoxide.
The multifunctional acrylate is specifically TMPTMA (trimethylolpropane trimethacrylate).
The coupling agent is gamma-glycidoxypropyltrimethoxysilane (KH-560).
The antioxidant is 2, 6-di-tert-butyl-p-cresol (antioxidant BHT) and tris [2, 4-di-tert-butylphenyl ] phosphite (antioxidant 168); the weight ratio of 2, 6-di-tert-butyl-p-cresol and tris [2, 4-di-tert-butylphenyl ] phosphite is 2: 1.
the raw material of the adhesive film layer B is the same as that of the adhesive film layer A.
The preparation method of the solar cell adhesive film comprises the following steps:
respectively putting the raw materials of the adhesive film layer A and the adhesive film layer B into an extruder for melting and plasticizing, and extruding and casting the raw materials to a roller through a die opening to obtain the adhesive film layer A and the adhesive film layer B; and placing the polyolefin fiber reinforced layer between the adhesive film layer A and the adhesive film layer B, heating and pressing, cooling, rolling and shaping to obtain the solar cell adhesive film.
The heating and pressing temperature is 155 ℃, and the pressing time is 30 min.
Example 3.
The embodiment provides a polyolefin fiber reinforced layer, and the preparation process of the polyolefin fiber reinforced layer comprises the following steps:
step 1, carrying out molten state treatment on an ethylene-vinyl acetate copolymer to obtain a melt;
step 2, carrying out high-temperature treatment on the polyolefin base material to obtain a fiber spinning solution;
step 3, spraying the fiber spinning solution through a spray head to form fiber yarns, and spraying the fiber yarns into the melt obtained in the step 1 to obtain a mixture;
and 4, cooling the mixture, and carrying out traction shaping to obtain the polyolefin fiber reinforced layer.
The molten state treatment in the step 1 is specifically to melt and plasticize the ethylene-vinyl acetate copolymer at 125 ℃ to obtain a melt.
In the step 2, the temperature of the high-temperature treatment is 210 ℃.
And 2, adding solvent oil when the polyolefin base material is subjected to high-temperature treatment, wherein the weight ratio of the polyolefin base material to the solvent oil is 9: 1.
the solvent oil is No. 5 white oil with kinematic viscosity of 5mm 2 (40 ℃) in Shanghai Bitsu Technological industries, Ltd.
In the step 3, the nozzles are arranged in a way that a plurality of nozzles which are arranged in parallel work simultaneously.
The length of the air jet section of the fiber filaments in the step 3 is 10 cm.
The length of the air jet section is the vertical height difference between a reaction device for containing melt and a spray head.
In the step 4, the temperature of the cooling operation is 80 ℃, and the drafting multiple of the traction operation is 5 times.
The polyolefin base material is polyethylene, in particular ultrahigh molecular weight polyethylene (UHMWPE).
The density of the ultra-high molecular weight polyethylene is 0.95g/cm 3 Average molecular weight of 160 ten thousand and linear thermal expansion coefficient of 2 x 10 -4 m/(m.K); from Zhang Kokono engineering plastics, Inc.
The ethylene-vinyl acetate copolymer has a melt index of 30g/10min and a VA content of 33%; in particular to an EVA product of the Japan Mitsui chemical model 150.
The weight ratio of the ethylene-vinyl acetate copolymer to the polyolefin base material is 5: 1.
in a second aspect of the present invention, an application of a polyolefin fiber reinforced layer in a solar cell adhesive film is provided, where the solar cell adhesive film has a structure of an adhesive film layer a, and as described above, the polyolefin fiber reinforced layer and the adhesive film layer B are sequentially stacked.
The glue film layer A comprises the following raw materials: according to the weight percentage, 3 percent of crosslinking promoting agent, 1.5 percent of coupling agent and 1 percent of antioxidant, and the balance of the olefin copolymer mixture is supplemented.
The olefin copolymer mixture is EVA and POE; the weight ratio of EVA to POE is 3: 1.
the melt index of EVA in the olefin copolymer mixture is 6g/10min, the tensile strength is 17.7MPa, and the vinyl acetate content is 28 wt%; in particular the United states
UE634-04。
The POE in the olefin copolymer mixture has a melt index of 3g/10min and a flexural modulus of 28 MPa; in particular to American Exxon Mobil POE 8203.
The crosslinking promoting agent is hydroperoxide and polyfunctional acrylate; the weight ratio of hydroperoxide to multifunctional acrylate is 1: 5.
the hydroperoxide is specifically tert-butyl hydroperoxide.
The multifunctional acrylate is specifically TMPTMA (trimethylolpropane trimethacrylate).
The coupling agent is gamma-glycidoxypropyltrimethoxysilane (KH-560).
The antioxidant is 2, 6-di-tert-butyl-p-cresol (antioxidant BHT) and tris [2, 4-di-tert-butylphenyl ] phosphite (antioxidant 168); the weight ratio of the 2, 6-di-tert-butyl-p-cresol to the tris [2, 4-di-tert-butylphenyl ] phosphite is 2: 1.
the raw material of the adhesive film layer B is the same as that of the adhesive film layer A.
The preparation method of the solar cell adhesive film comprises the following steps:
respectively putting the raw materials of the adhesive film layer A and the adhesive film layer B into an extruder for melting and plasticizing, and extruding and casting the raw materials to a roller through a die opening to obtain the adhesive film layer A and the adhesive film layer B; and placing the polyolefin fiber reinforced layer between the adhesive film layer A and the adhesive film layer B, heating and pressing, cooling, rolling and shaping to obtain the solar cell adhesive film.
The heating and pressing temperature is 155 ℃, and the pressing time is 30 min.
Example 4.
The embodiment provides a polyolefin fiber reinforced layer, and the preparation process of the polyolefin fiber reinforced layer comprises the following steps:
step 1, carrying out molten state treatment on an ethylene-vinyl acetate copolymer to obtain a melt;
step 2, carrying out high-temperature treatment on the polyolefin base material to obtain a fiber spinning solution;
step 3, spraying the fiber spinning solution through a spray head to form fiber yarns, and spraying the fiber yarns into the melt obtained in the step 1 to obtain a mixture;
and 4, cooling the mixture, and carrying out traction shaping to obtain the polyolefin fiber reinforced layer.
The molten state treatment in the step 1 is specifically to melt and plasticize the ethylene-vinyl acetate copolymer at 120 ℃ to obtain a melt.
In the step 2, the temperature of the high-temperature treatment is 220 ℃.
And 2, adding solvent oil when the polyolefin base material is subjected to high-temperature treatment, wherein the weight ratio of the polyolefin base material to the solvent oil is 9: 1.
the solvent oil is 32 # white oil with kinematic viscosity of 32mm 2 (40 ℃) in Shanghai Bitsu Technological industries, Ltd.
In the step 3, the nozzles are arranged in a way that a plurality of nozzles which are arranged in parallel work simultaneously.
The length of the air jet section of the fiber filaments in the step 3 is 10 cm.
The length of the air jet section is the vertical height difference between a reaction device for containing melt and a spray head.
In the step 4, the temperature of the cooling operation is 80 ℃, and the drafting multiple of the traction operation is 5 times.
The polyolefin base material is polyethylene, in particular ultrahigh molecular weight polyethylene (UHMWPE).
The density of the ultra-high molecular weight polyethylene is 0.95g/cm 3 Average molecular weight of 160 ten thousand and linear thermal expansion coefficient of 2 x 10 -4 m/(m.K); from Zhang Kokono engineering plastics, Inc.
The ethylene-vinyl acetate copolymer has a melt index of 30g/10min and a VA content of 33%; in particular to an EVA product of the Japan Mitsui chemical model 150.
The weight ratio of the ethylene-vinyl acetate copolymer to the polyolefin base material is 1: 1.
in a second aspect of the present invention, an application of a polyolefin fiber reinforced layer in a solar cell adhesive film is provided, where the solar cell adhesive film has a structure of an adhesive film layer a, and as described above, the polyolefin fiber reinforced layer and the adhesive film layer B are sequentially stacked.
The raw materials of the adhesive film layer A comprise: according to the weight percentage, 3 percent of crosslinking promoting agent, 1.5 percent of coupling agent and 1 percent of antioxidant, and the balance of the olefin copolymer mixture is supplemented.
The olefin copolymer mixture is EVA and POE; the weight ratio of EVA to POE is 1: 1.
the melt index of EVA in the olefin copolymer mixture is 6g/10min, the tensile strength is 17.7MPa, and the vinyl acetate content is 28 wt%; in particular the USI of the United states
UE634-04。
The POE in the olefin copolymer mixture has a melt index of 3g/10min and a flexural modulus of 28 MPa; in particular to American Exxon Mobil POE 8203.
The crosslinking promoting agent is hydroperoxide and polyfunctional acrylate; the weight ratio of hydroperoxide to multifunctional acrylate is 1: 5.
the hydroperoxide is specifically tert-butyl hydroperoxide.
The multifunctional acrylate is specifically TMPTMA (trimethylolpropane trimethacrylate).
The coupling agent is gamma-glycidoxypropyltrimethoxysilane (KH-560).
The antioxidant is 2, 6-di-tert-butyl-p-cresol (antioxidant BHT) and tris [2, 4-di-tert-butylphenyl ] phosphite (antioxidant 168); the weight ratio of the 2, 6-di-tert-butyl-p-cresol to the tris [2, 4-di-tert-butylphenyl ] phosphite is 2: 1.
the raw material of the adhesive film layer B is the same as that of the adhesive film layer A.
The preparation method of the solar cell adhesive film comprises the following steps:
respectively putting the raw materials of the adhesive film layer A and the adhesive film layer B into an extruder for melting and plasticizing, and extruding and casting the raw materials to a roller through a die opening to obtain the adhesive film layer A and the adhesive film layer B; and placing the polyolefin fiber reinforced layer between the adhesive film layer A and the adhesive film layer B, heating and pressing, cooling, rolling and shaping to obtain the solar cell adhesive film.
The heating and pressing temperature is 155 ℃, and the pressing time is 30 min.
Example 5.
The embodiment provides a polyolefin fiber reinforced layer, and the preparation process of the polyolefin fiber reinforced layer comprises the following steps:
step 1, carrying out molten state treatment on an ethylene-vinyl acetate copolymer to obtain a melt;
step 2, carrying out high-temperature treatment on the polyolefin base material to obtain a fiber spinning solution;
step 3, spraying the fiber spinning solution through a spray head to form fiber yarns, and spraying the fiber yarns into the melt obtained in the step 1 to obtain a mixture;
and 4, cooling the mixture, and carrying out traction shaping to obtain the polyolefin fiber reinforced layer.
The molten state treatment in the step 1 is specifically to melt and plasticize the ethylene-vinyl acetate copolymer at 120 ℃ to obtain a melt.
In the step 2, the temperature of the high-temperature treatment is 220 ℃.
Adding solvent oil when the polyolefin base material is subjected to high-temperature treatment in the step 2, wherein the weight ratio of the polyolefin base material to the solvent oil is (9): 1.
the solvent oil is No. 5 white oil with kinematic viscosity of 5mm 2 (40 ℃) in Shanghai Bitsu Technological industries, Ltd.
In the step 3, the nozzles are arranged in a way that a plurality of nozzles which are arranged in parallel work simultaneously.
The length of the air jet section of the fiber filaments in the step 3 is 10 cm.
The length of the air jet section is the vertical height difference between a reaction device for containing melt and a spray head.
In the step 4, the temperature of the cooling operation is 80 ℃, and the drafting multiple of the traction operation is 5 times.
The polyolefin base material is polyethylene, in particular ultrahigh molecular weight polyethylene (UHMWPE).
The density of the ultra-high molecular weight polyethylene is 0.95g/cm 3 Average molecular weight of 160 ten thousand and linear thermal expansion coefficient of 2 x 10 -4 m/(m.K); from Zhang Koukou engineering plastics, Inc.
The ethylene-vinyl acetate copolymer has a melt index of 30g/10min and a VA content of 33%; in particular to an EVA product of the Japan Mitsui chemical model 150.
The weight ratio of the ethylene-vinyl acetate copolymer to the polyolefin base material is 4: 1.
in a second aspect of the present invention, an application of a polyolefin fiber reinforced layer in a solar cell adhesive film is provided, where the solar cell adhesive film has a structure of an adhesive film layer a, and as described above, the polyolefin fiber reinforced layer and the adhesive film layer B are sequentially stacked.
The raw materials of the adhesive film layer A comprise: according to the weight percentage, 5 percent of crosslinking promoting agent, 0.8 percent of coupling agent and 1 percent of antioxidant, and the balance of the olefin copolymer mixture is supplemented.
The olefin copolymer mixture is EVA and POE; the weight ratio of EVA to POE is 3: 1.
the melt index of EVA in the olefin copolymer mixture is 6g/10min, the tensile strength is 17.7MPa, and the vinyl acetate content is 28 wt%; in particular of the United states
UE634-04。
The POE in the olefin copolymer mixture has a melt index of 3g/10min and a flexural modulus of 28 MPa; in particular to American Exxon Mobil POE 8203.
The crosslinking promoter is hydroperoxide and multifunctional acrylate; the weight ratio of hydroperoxide to multifunctional acrylate is 1: 2.
the hydroperoxide is specifically tert-butyl hydroperoxide.
The multifunctional acrylate is particularly TMPTMA (trimethylolpropane trimethacrylate).
The coupling agent is gamma-glycidoxypropyltrimethoxysilane (KH-560).
The antioxidant is 2, 6-di-tert-butyl-p-cresol (antioxidant BHT) and tris [2, 4-di-tert-butylphenyl ] phosphite (antioxidant 168); the weight ratio of 2, 6-di-tert-butyl-p-cresol and tris [2, 4-di-tert-butylphenyl ] phosphite is 1: 3.
The raw material of the adhesive film layer B is the same as that of the adhesive film layer A.
The preparation method of the solar cell adhesive film comprises the following steps:
respectively putting the raw materials of the adhesive film layer A and the adhesive film layer B into an extruder for melting and plasticizing, and extruding and casting the raw materials to a roller through a die opening to obtain the adhesive film layer A and the adhesive film layer B; and placing the polyolefin fiber reinforced layer between the adhesive film layer A and the adhesive film layer B, heating and pressing, cooling, rolling and shaping to obtain the solar cell adhesive film.
The heating and pressing temperature is 155 ℃, and the pressing time is 30 min.
Performance test method
1. Mechanical properties
The tensile strength of the solar cell adhesive films of examples 1-5 was tested with reference to GB/T29848-2018.
2. Aging resistance
Referring to GB/T29848 once 2018, the solar cell adhesive films of the examples 1 to 5 are placed in an ultraviolet high-temperature high-humidity aging environment (UV + DH 300h, UV cumulative radiation amount 60kWh/m 2 ) Treatment, test treatment of pretreatmentThe initial peel strength of the solar cell adhesive film/glass, and the retention rate of the peel strength after treatment.
The retention was calculated as post-treatment peel strength/initial peel strength 100%.
Performance test data
TABLE 1 Performance test results
Claims (10)
1. A polyolefin fiber reinforced layer, which is characterized in that the preparation process of the polyolefin fiber reinforced layer comprises the following steps:
step 1, carrying out molten state treatment on an ethylene-vinyl acetate copolymer to obtain a melt;
step 2, carrying out high-temperature treatment on the polyolefin base material to obtain a fiber spinning solution;
step 3, spraying the fiber spinning solution through a spray head to form fiber yarns, and spraying the fiber yarns into the melt obtained in the step 1 to obtain a mixture;
and 4, cooling the mixture, and carrying out traction shaping to obtain the polyolefin fiber reinforced layer.
2. A polyolefin fiber reinforced layer as claimed in claim 1, wherein the molten state treatment in step 1 is specifically to melt and plasticize the ethylene-vinyl acetate copolymer at 100 ℃ ℃. 150 ℃ to obtain a melt.
3. A polyolefin fiber reinforced layer as claimed in claim 1 or 2, wherein the temperature of the high temperature treatment in step 2 is 160-350 ℃.
4. A polyolefin fiber reinforced layer as claimed in claim 1, wherein in step 3, the nozzles are arranged such that a plurality of nozzles arranged in parallel operate simultaneously.
5. A reinforced layer of polyolefin fibers as claimed in claim 1 or 4, wherein the blown air length of the fiber filaments in step 3 is 4-16 cm.
6. A polyolefin fiber reinforced layer as claimed in claim 1, wherein in said step 4, the temperature of the cooling operation is 50-90 ℃ and the draft ratio of the drawing operation is 5-20 times.
7. A reinforced layer of polyolefin fibers as recited in claim 6, wherein said polyolefin base material comprises one or a combination of polyethylene, polypropylene, poly-1-butene, poly-4-methyl-1-pentene.
8. A solar cell adhesive film, which is characterized in that the structure of the solar cell adhesive film is an adhesive film layer A, a polyolefin fiber reinforced layer according to any one of claims 1 to 7, and an adhesive film layer B are sequentially laminated.
9. The solar cell adhesive film according to claim 8, wherein the raw material of the adhesive film layer A comprises: olefin copolymer mixture, crosslinking promoter, coupling agent and antioxidant;
the olefin copolymer mixture is at least 2 of ethylene-vinyl acetate copolymer, ethylene-octene copolymer and propylene copolymer;
the raw material of the adhesive film layer B is the same as that of the adhesive film layer A.
10. The solar cell adhesive film according to claim 8 or 9, wherein the solar cell adhesive film is prepared by the steps of:
respectively placing the raw materials of the adhesive film layer A and the adhesive film layer B in an extruder for plasticizing and casting, placing the polyolefin fiber reinforced layer between the adhesive film layer A and the adhesive film layer B, heating and pressing, cooling and rolling to obtain the solar cell adhesive film.
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