TW201100251A - Laminated polymer film and solar module made thereof - Google Patents

Abstract

Disclosed is a laminated film having: (a) a substrate; and (b) a bonding layer of ethylene polymer on one major surface of the substrate wherein the bonding layer is placed directly on the substrate or there is a (c) primer layer between the substrate and bonding layer. Also disclosed is a solar module made of such a laminated polymer film.

Description

201100251 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a laminated polymer film having improved bonding force between individual film layers. The layers of the laminated polymer film not only have a reinforcing bonding force but also have an improved joining force for the ethylene-vinyl acetate copolymer used as a solar cell element package. The invention also relates to a solar module made from such a laminated polymer film. [Prior Art] In view of global warming, the demand for energy conservation and emission reduction by governments around the world is growing. Therefore, the search for new energy to replace fossil fuels has become an urgent issue to be resolved. Solar energy is clean, non-polluting and uses inexhaustible energy. So far, solar energy has been mainly converted into electricity using solar modules. Electricity is then used to drive electric water heaters, electric vehicles and satellite components. A solar module means a photovoltaic device that produces electricity directly from light, especially sunlight. So far, common examples of solar modules include crystallization solar cells, such as single crystal germanium solar cells, polycrystalline solar cells and nano solar cells, and thin film solar cells, such as amorphous germanium thin film solar cells, cadmium telluride thin film solar cells. A module with a copper indium gallium selenide thin film solar cell. The crystallization solar module mainly comprises a back plate, a package, a photovoltaic circuit and a front plate. The thin film solar cell structure mainly comprises a photovoltaic circuit disposed on a substrate (for example, a glass plate, a polymer plate or a stainless steel plate), a package placed on the other surface of the photovoltaic circuit and the substrate, and placed on the package Board or 146091.doc 201100251 Backplane. The package is used in a solar module to interface with the front panel, the photovoltaic circuit, and/or the back panel. In a lamination operation of about 15 (TC), the melted package flows into the gap in the solar cell to encapsulate the solar cell. So far, the S帛 package material contains a polyethylene-acetic acid ethyl acetate copolymer and an ionic polymer. Polymers have disadvantages, including high cost, difficulty in processing, and very high hardness. In contrast, ethylene-ethylene acetate copolymer (EVA) has the advantages of ease of processing, medium price, and appropriate elasticity. Therefore, this is currently the most Polymeric packaging materials commonly used. Solar Moon b mode, and inner moon; The main role of I plate is to protect solar cells against machinery: impact and wear. In order to make full use of incident light, the front plate must be highly transparent in a certain spectral range. Luminosity (for example: for crystallized solar cells, from 400 to 1, 1 nanometer). In prior art solar modules, the front plate is mainly glass (usually 3 to 4 thick) Iron, quenched seam stone ((10) (four) flint) glass) or polymer material. The main role of the solar module inner back is to protect the solar cell and package against humidity and emulsification. In the solar module combination process, the back plate is also used as a mechanical barrier to avoid scratches and as an insulator. Therefore, the back plate must have excellent humidity barrier properties and elasticity, and good joint strength with the package. Oxygen and humidity penetrate into the solar module. The common backsheet of the solar module is a multi-layer laminated thin (for example, a polyester substrate) and a bonding layer on the surface of the substrate. The above laminated film of the substrate has excellent properties. Humidity and oxygen barrier properties, - the bonding strength between the substrate (for example, the polyester substrate) and the bonding layer is not satisfactory. 146091.doc 201100251 is all satisfactory. Sometimes, delamination occurs at the interface between the two layers. The bonding strength between the bonding layer and the package such as ethylene-acetic acid ethylene-polymer is not completely satisfactory. There is still room for improvement. Therefore, it has excellent humidity and oxygen barrier properties and is excellent in its interlayer. The bonding strength between the bonding strength 'and the ethylene-vinyl acetate resin as a solar cell package and the intrusion of the resin, so as to minimize the amount of the adhesive and the organic solvent. There is a need for a film. SUMMARY OF THE INVENTION The disclosed film is a laminate film having excellent barrier properties against humidity and oxygen, excellent joint strength between layers, and ethylene-vinyl acetate as a solar cell package. The resin has excellent joint strength. It is also disclosed that the solar module of the present invention uses the dust film of the present invention as the back sheet. The laminate film of the present invention is used as the back sheet or the front of the thin film solar module. The present invention is therefore a laminate film comprising: a substrate comprising a diester and a mixed (4)-polyacetate substrate comprising a first surface and a second surface comprising polyphthalic acid c2- a polymer selected from the group consisting of a 6-alkyl diester 'polynaphthalene dicarboxylate or a blend. (b) an adhesive layer on the first surface of the polyester substrate; (4) in the polyacetate a primer layer on the second surface of the material, wherein the primer layer has a thickness of less than 0.99 μm; (4) a bonding layer on the primer layer, wherein the bonding layer comprises ethylene and a group selected from the group consisting of Copolymer of one or more monomers: propylene 146091.doc 20110 0251 burnt vinegar, methacrylic acid cK4 vinegar, methyl acrylate, methyl propylene acrylate and maleic anhydride; and (6) protective layer on the adhesion layer, including the introduction A fluoropolymer having a modulus of elasticity greater than 15 〇 Kpsi. The disclosed system is a solar module comprising a front panel, a backsheet and a photovoltaic circuit encapsulated with a vinyl-vinyl acetate copolymer material, wherein the backsheet is comprised of the laminate film of the present invention. The disclosed embodiments are solar modules comprising photovoltaic circuits placed on glass sheets, polymers or non-ferrous steel sheets, and front and/or back sheets formed from the laminate film of the present invention. [Embodiment] Substrate The laminate film of the present invention comprises a substrate, wherein the substrate material is selected from the group consisting of poly-: or fluoropolymer. The laminate film may comprise a single layer or a plurality of layers of a fluoropolymer with an early layer or a plurality of layers of a fluoropolymer, for example, a laminate film of two or more layers of a mixture of a vinegar and a fluoropolymer. In another embodiment, the yL·M a « on the polyester or gas-containing polymer substrate is coated with a metal metal oxide and/or a non-metal oxide. Thus, in accordance with an embodiment of the present invention, the substrate may be selected from the group consisting of: (1) polyester vinegar such as polyphthalic acid k-burned vinegar, polynaphthalene dicarboxylic acid C26 alkaloid or its binary copolymer, multipolymer or mixture. (ii) a fluoropolymer; (a polyester or fluoropolymer having a coating of a metal, a metal oxide and/or a non-metal oxide on the surface; or 146091.doc 201100251 (IV) from one or more of the above A laminated film made of a plurality of materials. Polyester substrate When a substrate is produced using polyester, there is no particular limitation on the polyester to be used. It may be any conventional method of the prior art, or may be lamination. The double layer or the plurality of layers of the polyester film. In one embodiment, the polyester substrate has a total thickness of from 30 to 350 μm, preferably from 50 to 300 μm, more preferably from 7 to 25 μm.

Non-limiting examples of materials suitable for use in the substrate include, for example, polyphthalic acid C2·6 burnt vinegar, preferably polyphthalic acid C2.4 burnt vinegar, such as terephthalic acid Ethylene vinegar (PET), polytrimethylene terephthalate, polybutylene terephthalate, poly(p-phenylene terephthalate), poly(ethylene terephthalate), poly(phthalic acid) The diester, polybutylene phthalate, and poly(phthalic acid) diacetate are preferably polyethylene terephthalate; polycyanate C2-0 alkyl diester, preferably poly Naphthalene dicarboxylate C24 alkyl diester, such as polydiethylenedicarboxylate, poly(naphthalene dicarboxylate) and polynaphthalene dicarboxylate: copolymers and blends with two or more of the above materials Things. A suitable polyester substrate can be formed by biaxially oriented treatment after casting to enhance mechanical strength and gas barrier properties. The film has good mechanical, dielectric and gas barrier properties. Suitable polyacetal substrates are also commercially available, for example, from E I. (6) p〇nt and Nem〇urs and c〇mpany, Wilmington, Delaware USA ("(4)(10)")). Acid vinegar plate. Fluoropolymer substrate. The fluoropolymer suitable for the production of a substrate is not particularly limited. Any polymer film formed by a fluoropolymer can be known in any prior art. Non-limiting examples of suitable fluoropolymers of 14609I.doc 201100251 include, fluoroethylene polymers; copolymers of vinyl fluoride with other non-fluorinated, partially fluorinated or perfluorinated monomers; vinylidene fluoride polymers a copolymer of vinylidene fluoride with other non-fluorinated, partially fluorinated or perfluorinated monomers; chlorotrifluoroethylene polymer; chlorotrifluoroethylene and other non-fluorinated, partially fluorinated or perfluorinated a copolymer of monomers; a tetrafluoroethylene polymer; a copolymer of tetrafluoroethylene with other non-fluorinated, partially fluorinated or perfluorinated monomers. Non-limiting examples of other non-fluorinated, partially fluorinated or perfluorinated monomers include, for example, ethylene, propylene, fluoroacetam, ethylene difluoride, vinylidene fluoride, gas trifluoroethylene, hexafluoropropyl Dilute, tetrafluoroethylene, perfluorodecyl ether ether, perfluoropropene and the like. Fluoropolymers suitable as substrates are also commercially available, for example, TedlarTM polyvinyl fluoride available from DuPont or polyvinylidene fluoride available from Dyneon LLC (Oakdal, Minnesota), Ethylene-Four Fluoroethylene copolymer or tetrafluoroethylene/hexa-I-propylene/vinylidene fluoride copolymer. The fluoropolymer substrate can also be a laminate of two or more layers of fluoropolymer. In one embodiment, the substrate is formed of a polyvinyl fluoride layer and a polyvinylidene fluoride, ethylene-tetrafluoroethylene copolymer or a tetrafluoroethylene-hexafluoropropane/vinylidene fluoride copolymer layer. Laminated film. The fluoropolymer substrate has a total thickness of from 20 to 350 μm, preferably from 20 to 300 μm, more preferably from 20 to 250 μm. a polyester or fluoropolymer substrate having a coating of a metal, a metal oxide and/or a non-metal oxide on its surface, one or two major surfaces of the polyester substrate or fluoropolymer substrate are 146091 .doc 201100251 A single or multi-layered surface coating selected from gold. It is an emulsion and a non-metal oxide. The fluorine-containing coating is poly-plated: St: two-gold, and the compound is not particularly limited. It can be known as a metal oxide or a non-metal oxide. Metal oxides or non-metal oxides used for chemical modification include oxygen -2) or oxidation peaks 10, (4), 5.1.5). The oxide layer ο = deposited by a vapor deposition (CVD) method on a polyester or a building polymer 1 Å (the thickness of the Γ layer is generally 5 ° to 4 Å (A), preferably 1 (10) to The metal coating of the whole t is not particularly limited. It may be a conventional one known in the prior art: for example, 'silver foil, aluminum foil or tin foil. When considering the cost and other factors, the foil is generally used. The thickness of the metal coating is 益The breadth is particularly limited. It may be any conventional J drought. In one embodiment, the thickness of the metal coating is 5 to 50 microns, and ◎ is preferably 7 to 25 microns. It is possible to utilize a technique known in the art, layer = polymerized or gas-containing polymer substrate. For example, an adhesive may be used to facilitate the lamination process. ^ Surface" has metal, metal oxide / non-metal oxide The total thickness of the coated polyester substrate or fluoropolymer substrate is 8 to 35 Å, preferably 10 to 300 μm, more preferably 12 _25 h. The medium substrate may also be a laminated film of 146091.doc 201100251 which is formed of a fluoropolymer. The eight-layered vinegar of the air-containing arm is combined with a single layer or a layer of y============================================================================ The fluoropolymer layer is laminated on one or both of the major surfaces of the vine layer, in one embodiment; "material or a plurality of layers of granules η". The laminate of the fluoropolymer is formed by alternating the poly layer and the polymer layer. The vine layer is composed of a single layer or two layers, or a plurality of layers. A laminate formed by a brewing. A gas-containing polymer: the laminate may be a single layer of a fluoropolymer, or two layers, or a plurality of layers of a II-containing polymer. (IV) In a laminated film with a fluoropolymer The thickness may be any conventional thickness disclosed in the art. In one embodiment, the fluoropolymer layer has a thickness of from 15 to 50 microns', preferably from 2 to 4 microns. Polyester-fluoropolymer The laminated film substrate has a total thickness of from 3 Å to 35 Å, more preferably from 50 to 300 μm, still more preferably from 7 Å to 25 Å. Polyester and fluoropolymer layer The pressing method can be any of the prior art

Know the technology. In one embodiment, an adhesive is used to bond the fluoropolymer layer to the polyester substrate. S There is no particular limitation on the adhesive for bonding the fluoropolymer layer to the polyester layer. It can be a conventional adhesive known in the prior art. In one embodiment, a polyurethane adhesive is used, which is an adhesive of pp 525 Å and 15200 manufactured by Mitsubishi, Japan, in a weight ratio of 8 to 10:1, preferably 9:1. There is no special limit on the thickness of the adhesive layer used to bond the fluoropolymer to the polyester, as long as the adhesion strength meets the requirements. In one embodiment, the thickness of the adhesive layer ranges from 1 to 30 microns, preferably from 5 to 25 microns, more preferably from 8 to 18 microns. In the examples, two or more layers of a polycrystalline film containing a polymer were used as the substrate. The laminate film is selected from the group consisting of polyethylene oxide/polyethylene terephthalate film, polyethylene terephthalate/polyethylene terephthalate laminate film, and polyfluoride. Ethylene/polyethylene naphthalate ethylene glycol layer laminated film, polyvinyl fluoride/polyethylene terephthalate/polyvinyl fluoride laminated film, and poly(p-phenylene terephthalate) A film of ethylene dicarboxylate/polyethylene terephthalate. In another embodiment, a laminate film comprising an early or a plurality of layers of an aluminum foil layer having a thickness of 3 to 5 μm is used as the substrate. Non-limiting examples of the substrate include, for example, polyvinyl fluoride/aluminum foil/polyethylene terephthalate. The aluminum foil can be bonded to the surface of the fluoropolymer or polyester using an adhesive. In another embodiment, a film having a metal oxide coating on its surface is used as the substrate. Non-limiting examples of the substrate include, for example, polyvinyl fluoride/alumina/polyethylene terephthalate/polyethylene terephthalate. The substrate may comprise several types of additives such as light stabilizers, heat stabilizers, hydrolysis inhibitors, surface modifiers, fluorescent brighteners, light reflecting agents, pigments and pigments. Additives which are particularly suitable are additives which are conventionally used in the art. When the substrate is a laminate film (e.g., a 'polyacetated laminate film or a polyester-fluoropolymer laminate film), the additives are optionally added to the respective layers of the laminate film. 146091.doc 201100251 There is no particular limitation on the content of the additive as long as the additive does not adversely affect the strength of the substrate or laminate film. The soil bonding layer laminate film comprises a bonding layer on the major surface of the substrate for bonding the back sheet to the ethylene-vinyl acetate copolymer package. Suitable materials for forming the bonding layer are ethylene copolymer materials selected from the group consisting of ethylene-methacrylic acid Cw alkyl ester copolymers and ethylene-acrylic acid Ci 4 alkyl esters, for example, ethylene. Ethyl methacrylate copolymer, ethylene-methyl acrylate copolymer, ethylene-ethyl methacrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-propyl methacrylate copolymer, ethylene-propyl acrylate copolymer a mixture of ethylene, butyl methacrylate copolymer, ethylene butyl acrylate copolymer, and two or more copolymers thereof, wherein the total weight of each copolymer unit is derived from the copolymer unit derived from ethylene. 50% to 99%, preferably 70% to 95%; ethylene methacrylic acid copolymer, ethylene-propionic acid copolymer and blend thereof, wherein the copolymer of ethylene is derived from the total weight of each copolymer unit The unit leaf has 50 to 99%, preferably 7 to 95 Å/〇; an ethylene-maleic anhydride copolymer, wherein the total weight of each copolymer unit is in the copolymer unit derived from ethylene. 50 to 99 ❶ /. Preferably, from 7 to 95%; a multi-polymer formed from ethylene and at least two co-monomers selected from the group consisting of alkyl alkyl acrylate, alkyl acrylate, ethylene methacrylate , ethylene-acrylic acid and ethylene-maleic anhydride, non-limiting examples of which include, for example, ethylene-methyl acrylate-methacrylic acid terpolymer 146091.doc 201100251 (wherein derived from the copolymerization of decyl acrylate) The material unit has 2 to 30% by weight of a terpolymer derived from a copolymer unit derived from methylpropionic acid (1 to 30% by weight), and a terpolymer of ethylene-butyl acrylate-mercaptoacrylic acid (which is derived from The copolymer unit of butyl acrylate is 2 to 30% by weight, and the copolymer unit derived from methacrylic acid is 1 to 30% by weight, and the terpolymer of ethylene-mercapto propyl acrylate-acrylic acid (wherein the source) The copolymer unit of propyl methacrylate has 2 to 30% by weight, and 1 to 3% by weight based on the copolymer unit derived from acrylic acid, and a terpolymer of ethylene-acrylic acid acrylate-acrylic acid (wherein The copolymer of methacrylate is 2 to 30% by weight, and is derived from The copolymer unit of the acrylic acid has 1 to 30% by weight of ethylene terephthalate-maleic anhydride terpolymer (in which the copolymer unit derived from methyl acrylate has 2 to 30% by weight' a copolymer of ethylene-butyl acrylate-maleic anhydride (a copolymer unit derived from butyl acrylate) with a copolymer unit derived from maleic anhydride: 2 to 1% by weight) a terpolymer having 2 to 30% by weight, based on the copolymer unit derived from maleic anhydride, 〇 2 to 1% by weight, and acetonitrile-acrylic acid-maleic anhydride (wherein 2 to 30% by weight of the copolymer unit of acrylic acid, 0.2 to 10% by weight based on the copolymer unit derived from maleic anhydride; and at least one selected from ethylene and propylene methacrylate Copolymers formed from the following co-monomers: C14 alkyl methacrylate, alkyl acrylate, ethylene-methacrylic acid, ethylene-acrylic acid and ethylene-cis-butane dianhydride, which are non-limiting Examples include, for example, ethylene-butyl acrylate-glycidyl methacrylate methacrylate, which is derived from propylene Namely butyl acrylate copolymer units of from 2 to 30 wt%, and Yue group derived from the glycidyl acrylate oligomer ugly 146091.doc -13- 201100251 meter unit 1 to 15 wt. /. a blend with two or more of the above materials. The bonding layer suitable for use in the laminate film has a thickness of from 丨〇 to 4 μm, preferably from 40 to 200 μm. The bonding layer may have a solar module for packaging (generally polyethylene_vinyl acetate, polyethylene-methyl vinegar, polyethylene butyl acrylate, polyethylene-methacrylate, ionic polymer, polyurethane or polyethylene) The encapsulating layer of butyraldehyde) has good adhesion properties, good dielectric properties and anti-aging. The tie layer can contain several types of additives. Suitable non-limiting examples include light stabilizers, heat stabilizers, slip agents, light reflecting agents, and pigments. The content of the additive in the bonding layer is not particularly limited as long as the additive does not adversely affect the final adhesive property of the bonding layer or the laminated film, and the bonding layer can be used in the technical field. Non-limiting examples of the method of splicing include, for example, squeezing a suitable copolymer resin in a masking machine, applying an extrusion method to the surface of the substrate by extrusion using an extrusion molding die, or (iv) applying a coating agent In the embodiment, the bonding layer is bonded to the substrate without using an adhesive, and more particularly, the adhesive diluted with an organic solvent is not used. In one embodiment, the ethylene/methyl acrylate copolymer (containing 13 weights, having a flammability index of 9' manufactured by DuPont) is melted by a single screw, and the melted press is extruded in 2 thieves. , bonded to polyterephthalic acid 146091, doc -14· 201100251 ethylene diester (PET) substrate. The bonding layer may be a single layer material or a laminate of two or more layers of materials. For example, the bonding layer of the present invention may be 2 to 8 layers of a polymer material selected from the above ethylene copolymer materials, respectively. It is preferably a laminate of 2 to 6 layers, more preferably 2 to 3 layers. In one embodiment, the bonding layer is a three-layer laminate, one of which is a polymer sheet formed of a polymer material selected from the group consisting of ethylene-methacrylic acid Cl_4 alkyl ester copolymer, ethylene-acrylic acid. A Cm alkyl ester copolymer, an ethylene-methyl acrylate copolymer, an ethylene-acrylic acid copolymer and an ethylene-maleic anhydride copolymer. Further, the layer is a polymer sheet formed of a multicomponent polymer of ethylene and at least two monomers selected from the group consisting of Cm alkyl acrylate, Cm alkyl acrylate, methacrylic acid, acrylic acid and butylene. Anhydride. The other layer of the polymer sheet is a polymer sheet formed of ethylene and at least one co-monomer containing methyl methacrylate propylene acrylate-based multicomponent polymer: Ci·4 alkyl methacrylate 〇1_4 alkyl acrylate, methacrylic acid, acrylic acid and cis-succinic anhydride. The three-layer polymer sheets have about the same thickness, so that the final polymer sheet as the bonding layer has a thickness of 10 to 400 μm, preferably 40 to 2 μm. In another embodiment, the bonding layer is a two-layer laminate, one of which is a polymer sheet formed from a polymer material selected from the group consisting of ethylene-methacrylic acid c]·4 alkyl ester copolymer, ethylene-acrylic acid. a Ci_4 alkyl ester copolymer, an ethylene-indenyl acrylic copolymer, an ethylene-acrylic acid copolymer, an ethylene-maleic anhydride copolymer, a copolymer of ethylene and at least two monomers selected from the group consisting of: Acrylic acid (:1. 4 alkyl ester, ethylene _acrylic acid Ci4 alkyl ester, methyl propyl 146091.doc 15 201100251 olefinic acid, acrylic acid, and maleic anhydride; and ethylene and propylene methacrylate A propylene-based propylene glycol acrylate copolymer formed from at least one comonomer: Cw alkyl methacrylate, c, _4 alkyl acrylate, methacrylic acid, acrylic acid and maleic anhydride, and a blend of two or more of the above polymers. The other layer is a polymer sheet formed from a polymeric material selected from the group consisting of polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-methacrylic acid. Ci*alkyl ester copolymer, ethylene bismuth acrylate A-4 alkyl ester copolymer, an ethylene-methacrylic acid copolymer, an ethylene acrylic acid copolymer, an ethylene-maleic anhydride copolymer, a copolymer of ethylene and at least two monomers selected from the group consisting of: Cw alkene propylene methacrylate acrylate C 1 _4 burnt, mercapto acrylic acid, propionic acid and cis-succinic anhydride; and bismuth from ethylene and at least one comon selected from the group consisting of A glycidyl acrylate-containing propyl acrylate copolymer formed from propylene acrylate: methacrylic acid (: 1-4 alkyl ester, acrylic acid (: 1-4 alkyl ester, methacrylic acid, propylene oxime and maleic anhydride) a blend of two or more of the above polymers. In another embodiment, the tie layer is a three layer laminate, one of which is a polymer sheet formed from a polymeric material selected from the group consisting of: Ethylene-mercaptoacrylic acid <^_4 alkyl ester copolymer, ethylene-acrylic acid C1_4 alkyl ester copolymer, ethylene-mercaptoacrylic acid copolymer, ethylene-acrylic acid copolymer, ethylene-maleic acid: copolymer, ethylene a mixture of at least two monomers selected from the group consisting of: methacryl Acid Ci.4 alkyl ester, acrylate, methacrylic acid, acrylic acid and cis-butadiene; and methacrylic acid propylene-acrylic acid from ethylene and at least one comonomer selected from the group consisting of形成 丙 146 146091.doc -16- 201100251 = acid propylene-propylene copolymer: thiol propylene ▲ ▲, acrylic burning 0, methacrylic acid, acrylic acid and maleic acid needle a blend of two or more of the above polymers. The other layer is a polymer sheet formed of a polymer material selected from the group consisting of polyethylene, polypropylene, ethylene-propylene copolymer t, Ethylene-methacrylic acid Ci-4 alkyl ester copolymer, ethylene-acrylic acid Cl_4 alkylene copolymer, ethylene-methacrylic acid copolymer, ethylene. Acrylic acid: ethylene, cis-butane dianhydride copolymer And a copolymer formed by the combination of B and ❹〃 from the following: 甲基 甲基 妇 Cu 、 丙 丙 丙 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 And maleic acid; the content of f formed from ethylene and methyl acrylate acid propylene vinegar having at least one comonomer selected from the group consisting of Glycidoxy-based acrylic copolymer stuffed: methacrylic acid C "4 alkyl acrylate, ^ alkyl ester, methacrylic acid, acrylic acid and maleic anhydride, and the two or more polymers of the blend. The other layer is a polymer sheet formed of a polymer material selected from the group consisting of polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-mercaptoacrylic acid Cw alkane vinegar copolymer, ethylene-acrylic acid C!-4 An alkyl ester copolymer, an ethylene-methacrylic acid copolymer, an ethylene-acrylic acid copolymer, an ethylene butyl bromide copolymer, a copolymer of ethylene and at least two monomers selected from the group consisting of: a propyl acetoate Cw octoate, a Ci 4 acrylate, a methyl acrylate, an acrylic acid, and a cis-succinic anhydride; and a methacrylic acid ring having at least one comon selected from the group consisting of a propyl acrylate-containing propylene-acrylic acid copolymer formed by oxypropyl acrylate: Cw alkane methacrylate, Ci4 alkyl acrylate, methacrylic acid, acrylic acid and cis-succinic acid field, or the above A composition of two or more polymers. 146091.doc -17- 201100251 Polyethylene and polypropylene suitable for bonding layers include high density polyethylene, medium density polyethylene, low density polyethylene, linear low density polyethylene, metal aromatics - derived low density Polyethylene and polypropylene homopolymer. A plurality of laminated films having a bonding layer may be bonded to the substrate of the present invention by extrusion-coating using two or more extruders. 'In order to increase the bonding strength between the substrate and the bonding layer, the surface of the substrate may be a surface treated person. Suitable surface treatment methods are not limited and can be any conventional method in the art. For example, it may be corona treatment, flame treatment or primer treatment. Non-limiting examples of suitable primers include imines and amine primers. When the primer treatment is applied to the surface treatment of the surface of the substrate, the final thickness of the formed primer is not particularly limited and may be any common thickness in the art as long as the primer is bonded to the polyester substrate and the bonding layer. The intensity does not overlap into a negative impact. The thickness of the primer is generally less than 15 microns, suitably less than K2 microns, preferably less than m meters, more preferably less than 〇99 microns, most preferably less than 0.8 microns, most preferably less than 〇.5. Micron. For example, the thickness of the primer can be less than 0.45 micrometers, which is extremely high, and it is less than or equal to the thickness of the primer. She collapses or falls below one embodiment. The thickness of the primer is 0.01 to 0 99 micrometers, which is suitable for .01 to 0.8 microns, preferably 0.01 to 0.5 microns. The surface treatment method used by the priest is, for example, corona treatment or flame treatment, and the bonding layer is directly placed on the substrate. Directly placing the bonding layer on the substrate of the present invention means that no coating or layer is applied between the bonding layer and the substrate to improve the bonding strength between the bonding layers. 146091.doc -18· 201100251 The laminated film has high joint strength or peel strength between the substrate and the bonding layer. The joint strength between the two layers of the laminate film is higher than that of the joint strength between the substrate and the bonding layer which can be seen in the art, and the joint strength can be as high as 1 〇 Newton/cm according to the butt peel test result. Laminated films are particularly suitable for use in the preparation of backsheets for crystalline germanium solar modules, or front or backsheets of thin film solar modules. The backsheet or the frontsheet not only has good peel strength, but also avoids delamination between the joint layer and the ethylene-vinyl acetate brewing copolyester encapsulation layer, which is caused by the joint layer and ethylene-vinyl acetate 曰The high bonding strength between the copolymer encapsulating layers can effectively extend the life of the solar module. The invention is further illustrated by the following exemplified examples. EXAMPLES Test Method 1. Peel strength test between the substrate of the laminate film and the bonding layer. The laminated film was cut into a sample purlin having a width of 2.54 cm and a length of 1 cm, and the bonding layer and the substrate were respectively fixed to the upper clamp and the lower clamp of the tensile tester, and the peeling test was performed at a speed of 5 inches per minute. . 2. Peel strength test between the bonding layer and the ethylene-acetate copolymer package laminate film (having a bonding layer adjacent to the encapsulation layer), ethylene acetate vinegar copolymer encapsulation layer and sheet glass Stacked in the appropriate order and cross-linked for four (four) minutes at the operating temperature of UOt. Thereafter, the sample was cut into strips having a width of 2.54 cm and a length of 1 cm. Backsheet layer The ruthenium film and the package/glass layer were peeled off at a speed of 5 inches per minute, respectively, to the upper clamp 146091.doc -19- 201100251 fixed to the tensile meter. 3. Hygrothermal aging test of solar cell components The process for encapsulating solar cell components includes sorting and sorting solar cells, single-sided welding, serial welding, stacking, lamination, component testing, framing and cleaning. The hygrothermal aging test of the laminated solar cell element is typed in the climatic chamber vC4〇i8 (purchased by Vdtsch Industnetechnik GmbH, Germany), according to the crystal solar module, IEC 6丨2丨5第丨〇·丨3. The solar cell test piece was kept in a hot and humid environment for 1 hour (85 乞 and relative humidity). After that, the component was removed and the ethylene-vinyl acetate was peeled off. Copolymer encapsulation layer. Stripped B-vinyl acetate vinegar copolymer package I, tested by Huang Ehner, USA, Lambda 95G UV/Vis/NIR spectrometer (including 15 〇 Gong Chu integrating sphere) to test its yellowing index (yeii〇wing to ΔΥΙ): ' "x A 1- I 〇 where YG means not treated under moist heat conditions < G-vinyl acetate copolymer encapsulation layer after stripping 'with Lambda 950 UV umbrella,, ', The extinction value measured by Buguang/visible/near-infrared light and ancient spectroscopy. γ refers to the extinction, *, 950 measured after the peeling of the encapsulation layer of ethylene-acetic acid ethyl ester copolymer treated by the wet heat condition of Jingjing 1. UV/visible/near-infrared light Lambda means the placement of the package; ^ when the hot material is reduced to zero, ;: one, too _ pool has excellent == 4 _ solar cell output power test method 146091.doc -20- 201100251 solar cell output power using 3500SLP components Test system measurements (available from Spire Corporation, USA) compared to polycrystalline tantalum solar cells assembled from conventional front and backsheet materials. 5. Bonding strength between bonded layers of laminate films. The film was cut into strips having a width of 2.54 cm and a length of 10 cm, and the top layer and the bottom layer were respectively fixed to the upper clamp and the lower clamp of the tensile tester, and the peeling test was performed at a speed of 5 inches per minute. Comparative Example 1 In this example, the backsheet used was made of a laminate film having a PVF/PET/PVF construction, available from Isovolta Group. PVF is an abbreviation for polyvinylidene fluoride. By using the above method, it was measured. The peel strength between polyvinylidene fluoride and polyethylene terephthalate was measured to be 4 Newtons/cm. By using the above method, the laminate between the back sheet and the EVA encapsulant layer was measured. Stripping The measurement was measured to be 4.5 Newtons/cm. Q Preparation of Solar Modules The following components were stacked in the following order and laminated under vacuum in a vacuum to form a solar module: - purchased by Dongguan CSG Solar Glass Co., Ltd. 3 · 2 mm thick tempered glass; - EVA packaging film (500 micron, Ruifu brand EVA film for photovoltaic cells, R767, purchased by Ruiyang Photovoltaic Material Co_, Ltd.); - Polycrystalline germanium photovoltaic circuit (125x125χ〇) · 3 mm, 72 circuits in series); 146091.doc -21 - 201100251 -EV read film (10) micron, used to prepare photovoltaic cells (4) read EVA4 m > R767, ^Ruiyang Photovoltaic Material Co Ltd· purchased) And a back sheet made of the laminated film of Comparative Example 1 above. " The method, assembly solar cell output power was determined to be 175 watts. The yellowing index ΔΥΙ was determined to be 〇 6 by performing the wet heat aging test of the solar cell element using the above method. Example 1 A laminate film was prepared and tested for properties from I. du Pont de Nemours and Company, Wilmington's Delaware, USA ("DuPont") 25 μm thick ^^ Polyethylene film 'and The main surface joint of a 200 micron thick polyethylene terephthalate plate purchased from DuPont. The adhesive used was a 9:1 (w/w) mixture of pp525()/i5 phase polyurethane adhesive, purchased from Mitsubishi, Sakamoto. The adhesive layer is 12 microns thick. On the extrusion-coater manufactured by DaV1S Standard, Ep(10)in p_ 1050 (manufactured by Nippon Shokubai Co., Ltd.) was coated on the other main surface of the polyethylene terephthalate sheet as a 90.90 μm thick primer. . Thereafter, a layer of a vinyl acrylate copolymer (80% derived from an ethylene monomer) was applied at 29 Torr: extrusion onto a primed surface to a thickness of 75 μm to form a laminate film. By using the above method, the peel strength between the polyethylene terephthalate acid ethyl ester plate and the vinyl acrylate copolymer layer was measured to be 21 Newtons/cm. Compared with the peel strength of the conventional laminate film described in Comparative Example 1, J 4609]. doc • 22 - 201100251 The laminate film of the present invention was increased by four times. After 1,000 hours of accelerated moist heat aging under conditions of 85 ° C and 85% RH (relative humidity), the peel strength was measured to be 12 Newtons/cm. By using the above method, the peel strength between the ethylene-methacrylate copolymer layer and the ethylene-vinyl acetate copolymer package was determined to be 8 j Newtons/cm. Comparing the peel strength of the conventional laminate film (comparative example with the ethylene-vinyl acetate copolymer package), the peel strength between the laminate film of the present embodiment and the ethylene-vinyl acetate copolymer package was increased by about 16 times. Preparation of Solar Module The following components were stacked in the following order and laminated under vacuum by vacuum to form a solar module: 3_2 mm thick tempered glass purchased by Dongguan CSG Solar Glass Co., Ltd.; - EVA packaging film (500 micron, Ruifu brand 〇ΕνΑ film for the preparation of photovoltaic cells, R767, by Ruiyang photov〇ltaic Material c〇..

Ltd. purchased; - polycrystalline germanium photovoltaic circuit ^ 25 "25" · 3 mm, one circuit in series); - EVA packaging film (5 μm, used to prepare photovoltaic cell ruler (1) chemical EVA film 'R767 , obtained by Ruiyang Photovoltaic Material Co., Ltd.; '- The laminate film disclosed in the above Example 1 has the above ethylene methacrylate copolymer facing the above eva film. By using the above method, the assembled solar cell output power was determined to be 146091.doc -23·201100251 177 watts. Humidity heat aging test of solar cell elements The solar cell element damp heat aging test was carried out by using the above method, and the yellowing index ΔΥΙ was calculated to be 0.1. Comparative Example 2, as described in Example 1 of JP-A-2008-108947, the ethylene-methacrylic acid vinegar copolymer described in Example 1 of JP-A No. 08-108947, which is subjected to heat. After lamination, the peel strength between the two was tested. The initial peel strength was 1.5 Newtons/cm. After accelerated damp heat aging 1, after 〇〇〇 hours, the peel strength was less than 0.7 Newtons/cm. Comparative Example 3 The ΡΕτ described in Example 1 of JP 2008-108947, and the ethylene methacrylate copolymer described in Example 1 of JP 2008-108947, adhered with polyurethane. The polyester (polyester-based polyurethane matrix is bonded to isophorone diisocyanate (IPDI) and phenyl diisocyanate (XDI) mixed curing agent). The initial peel strength between the two was 7 · 5 Newtons / cm. After accelerated damp heat aging, the peel strength is less than 〇·8 Newtons/cm. Example 2 Preparation of a laminate film and testing of its properties A 25 micron thick TedlarTM polyvinyl fluoride film available from DuPont was bonded to the main surface of a 200 micron thick polyethylene terephthalate sheet also known from DuPont. The 9:1 (weight/weight) mixture of the adhesive used as the PP5250/I5200 polyurethane adhesive was purchased from Mitsubishi, Japan. The adhesive layer is 丨 2 microns thick. On the extrusion-coating machine manufactured by Davis Standard, Epomin p_ 146091.doc -24- 201100251 1050 (manufactured by Nippon Shokubai Co., Ltd.) was coated on the other main surface of the polyethylene terephthalate plate. As a 0.50 micron thick primer. Thereafter, a layer of ethylene-methacrylate copolymer (80% of which is derived from ethylene monomer) containing 5% by weight (wt/wt) of the total weight of the copolymer is extruded and coated at 290 ° C. The surface of the primer was applied to form a laminate film having a thickness of 75 μm. By using the above method, the peel strength between the polyethylene terephthalate sheet and the ethylene-methacrylate copolymer layer was determined to be 20 N/cm. After accelerated heat aging for 1,000 hours at 85 ° C and 85% RH, the peel strength was measured to be 12 Newtons / cm. By using the above method, the peel strength between the ethylene-methacrylic acid vinegar copolymer layer and the ethylene-vinyl acetate copolymer package was determined to be 80 N/cm. Preparation of Solar Modules The following components were stacked according to the following sequence, and vacuum laminated by hot pressing to form a solar module: - 3.2 mm thick tempered glass purchased by Dongguan CSG Solar Glass Co., Ltd.; - EVA Package film (500 micron, Ruifu brand EVA film for photovoltaic cells, R767, available from Ruiyang Photovoltaic Material Co., Ltd.); - polycrystalline germanium photovoltaic circuit (125x125x0.3 mm, 72 circuits in series); EVA encapsulating film (500 micron, Ruifu brand EVA film for preparing photovoltaic cells, R767, available from Ruiyang Photovoltaic Material Co., Ltd.); and 146091.doc -25 - 201100251 laminated film disclosed in the above embodiment 2 (and shou, (having the above-mentioned ethylene-methacrylate copolymer facing the above EVA film). By using the above method 177 watts, the Wei I solar abalone battery output power is determined as the hygrothermal aging of the solar cell element The wet heat aging test of the test cell components was carried out by using the above method for solar electric test, and the yellowing index ΔΥΙ was calculated as 〇 1. Example 3 Preparation of laminated film and its properties The 25-micron thick TedlarTM polyvinyl fluoride film purchased from DuPont was tested with the main surface of a 200 micron thick polyethylene terephthalate board also purchased from: State. The adhesive used was PP525〇/I52〇. A 9 wt/wt mixture of urethane adhesive was purchased from Mitsubishi, pp. The adhesive layer is 12 microns thick. On an extrusion-coating machine manufactured by Davis Standard, Ep〇min p_ 1 〇5〇 (manufactured by Nippon Shokubai Co., Ltd.) was coated on the other main surface of the polyethylene terephthalate sheet as 〇·45. Micron thick primer. Thereafter, the ethylene-malerene anhydride copolymer (80% w/w is derived from the ethylene monomer) and the ethylene-methane propylene oxime containing 5% (w/w) of the total reset of the copolymer. S曰 (80% w/w from ethylene monomer) 丨: 9 (w/w) of this compound, extruded _ coated on the surface of the primer to form a film of micro-pressure.脱 By using the above method, the peel strength of the polyethylene terephthalate sheet and the bonding layer was measured to be 23 Newtons/cm. After the accelerated heat and humidity aging for 1,000 hours at 85 ° C and ^, the peel strength was measured 14609]. d〇c -26- 201100251 was 12 Newtons/cm. By using the above method, the peel strength between the bonding layer and the ethylene-vinyl acetate copolymer encapsulating layer was determined to be 80 N/cm. Preparation of Solar Modules The following components were stacked in the following order, laminated under vacuum by hot pressing to form a solar module. - 3.2 mm thick tempered glass purchased by Dongguan CSG Solar Glass Co., Ltd.; -EVA packaging film (500 micron, Ruifu brand EVA film for photovoltaic cells, R767, available from Ruiyang Photovoltaic Material Co., Ltd.); - polycrystalline germanium photovoltaic circuit (125x125x0.3 mm, 72 circuits in series) - EVA encapsulating film (500 micron, Ruifu brand EVA film for preparing photovoltaic cells, R767, available from Ruiyang Photovoltaic Material Co., Ltd.); and q - laminated film disclosed in the above embodiment 3, having a surface The above copolymer mixture of the above EVA film. By using the above method, the assembled solar cell output power was determined to be 178 W. The damp heat aging test of the solar cell element was carried out by using the above method for the damp heat aging test of the solar cell element, yellowing The index AYI was calculated to be 0.1. Example 4 A 25 micron thick TedlarTM polyvinyl fluoride film purchased from DuPont was also purchased from 146091.doc -27-2 01100251 DuPont's 200 μm thick polyethylene terephthalate board is bonded to the main surface. The adhesive used is a PP5250/I52 〇〇 polyurethane adhesive 9: ι (heavy stem / heavy ΐ) mixture purchased from Mitsubishi , Japan. The adhesive layer is 12 μm thick. On the extrusion-coating machine manufactured by DaWs Standard, Ep〇min ρ_ 1050 (manufactured by Nippon Shokubai Co., Ltd.) is another main component of polyethylene terephthalate board. The surface was coated as a 0.48 micron thick primer. Thereafter, a layer of ethylene-butyl acrylate-methacrylic acid terpolymer (the weight ratio of the three monomers was 88.5.7.5.4) was extrusion-coated on the surface of the primer. A laminate film having a thickness of 75 μm was formed. By using the above method, the peeling strength between the polyethylene terephthalate plate and the bonding layer was determined to be 25 Newtons/cm. Under the conditions of 85 t and 85% rh, After two hours of acceleration/stupid heat aging, the peel strength was measured to be 1 2 Newtons/cm. By using the above method, the peel strength between the bonding layer and the ethylene-vinyl acetate copolymer encapsulating layer was determined to be 82 Newtons. /cm. Preparation of solar modules The following components are roots Stacked in the following order, vacuum laminated by vacuum to form a solar module: - 0〇1^柽1^11匸36 8〇1&犷01&55(2〇.,1^(1. Get 3.2 mm thick tempered glass; _ EVA packaging film (50 〇 micron, Ruifu brand EVA / film for the preparation of photovoltaic cells ' r767 ' purchased by Ruiyang photovoltaic Material Co., Ltd.); - 夕日日石夕Photovoltaic circuit (125><125><3 mm, 72 circuits in series); 146091.doc 201100251 -EVA package film (500 micron, for the production of photovoltaic cells such as EVA film, R767, by Ruiyang Ph〇t〇v〇haic MateHal c〇,

The laminate film disclosed in the above Example 4 has the above-mentioned terpolymer facing the above eva film. By using the above method, the assembled solar cell output power was determined to be 175 watts. 〇 湿 Humidity heat aging test of solar cell elements The hygrothermal aging test of the solar cell element was carried out by the above method. The calculation result of the yellowing index ΔΥΙ was 〇”. Example 5 A 25 micron thick PTFE polyfluoroethylene film purchased from DuPont was bonded to the main surface of a 200 micron thick polyethylene terephthalate plate also purchased from DuPont. The adhesive used was 卯. 525〇/152〇〇 Polyamine vinegar adhesive 9: 丨 (重重重里) murder, purchased from Mitsubishi, Japan. Adhesive layer is! 2 microns thick. Made by extrusion-coating machine, Epomin P_1〇5〇(manufactured by Nippon Shokubai Co., Ltd.) was coated on the other main surface of polyethylene terephthalate board as a 〇·48 μm thick primer. After that, ethylene-acrylic acid butyl s-- Acrylic propylene-acrylic terpolymer (25% (weight/reciprocity is derived from propylene acetonitrile monomer and 12% (w/w) is derived from methyl acrylate epoxy monomer) layer, Extrusion-coating on the surface of the primer to form a laminate film. The peel strength between the board and the bonding layer was determined to be 26 Newtons/cm by using the above-mentioned square m@m^tf. After accelerated with aging conditions of 85% RH, after 1 hour, the peel strength was determined to be 146091.doc •29·201100251 was 11 Newtons/cm. In the above method, the peel strength between the bonding layer and the ethylene-vinyl acetate copolymer package was determined to be 80 N/cm. Preparation of Solar Module The following elements were stacked according to the following procedure, and laminated under vacuum by hot pressing. To form a solar module: - 3.2 Å thick tempered glass purchased by Dongguan CSG Solar Glass Co., Ltd.; - EVA packaging film (500 micron, Ruifu EVA film for photovoltaic cells, R767, by Ruiyang Photovoltaic Material Co·, Ltd. purchased; - polycrystalline germanium photovoltaic circuit (125x125x0.3 mm, 72 circuits in series); -EVA package film (500 micron, Ruifu EVA film for photovoltaic cells, R767, by Ruiyang Photovoltaic Material Co., Ltd. purchased; and the laminated film disclosed in the above Example 5, having the above-mentioned terpolymer facing the above EVA film. By using the above method, the assembled solar cell output power was determined to be 178. The heat and humidity aging test of the solar cell element is carried out by using the above method for the damp heat aging test of the solar cell element, and the yellowing index AYI is calculated. 0.1. Example 6 A 25 micron thick TedlarTM polyvinyl fluoride film purchased from DuPont and a major surface of a 200 micron thick polyethylene terephthalate plate also available from 146091.doc -30- 201100251 DuPont 2. The adhesive used was a 9:1 (Heavy/Heavy) mixture of 卯5250/15200 Polyurethane Adhesives, purchased from Mitsubishi, Japan. The adhesive layer is (2) drums thick. On an extrusion-coating machine manufactured by Davis Standard, Ep〇min p_ 1050 (manufactured by Nippon Shokubai Co., Ltd.) was coated on the other main surface of polyethylene terephthalate plate as a 〇·5 μm thick. Primer. Thereafter, ethylene-methyl acrylate-maleic anhydride trimer (2% by weight (weight/weight) is derived from methyl acrylate monomer and 0.3% (w/w) is derived from maleic anhydride single The layer is extruded-coated onto the surface of the primer to form a laminate film. By using the above method, the peel strength between the polyethylene terephthalate sheet and the bonding layer was measured to be 26 N/cm. After accelerated hythermal heat aging for 10,000 hours at 85 ° C and 85% RH, the peel strength was measured to be 11 Newtons/cm. The peel strength between the bonding layer and the ethylene-vinyl acetate copolymer package was determined to be 8 Newtons/cm by using the above method. Preparation of Solar Modules The following components were stacked in the following order, and vacuum laminated by hot pressing to form a solar module: - 3.2 mm thick tempered glass purchased by Dongguan CSG Solar Glass Co., Ltd.; - ΕνΑ Package film (50μm, Ruifu EVA film for PV cells 'R767' purchased by Ruiyang Photovoltaic Material Co., Ltd.); - Polycrystalline lithography circuit (125x125x0.3 mm, 72 in series) Circuit); 146091.doc -31- 201100251 - Title (four) film (_micron, used to prepare photovoltaic cell Ruifu brand EVA film, R767, purchased by Ruiyang ph〇t〇v〇haic (10)); and - the above embodiment The disclosed laminate film has the above-mentioned terpolymer facing the above-mentioned jump film. The assembled solar cell output power was determined to be 178 watts by using the above method. Humidity heat aging test of solar cell elements The wet heat aging test of solar cell elements was carried out by the above method, and the result of the yellowing index ΔΥΙ was calculated. Example 7 The main surface of a 200 micron thick polyethylene terephthalate board purchased from DuPont was treated with corona.乙 On the extrusion-coating machine manufactured by Davis Standard, ethylene-acrylic acid-mu-bee butene-anhydride terpolymer (2% by weight/weight) is derived from acrylic 7 monomer and 0.3% (w/w) is a layer derived from cis-buthanic acid liver monomer, and is applied to a corona-treated surface of a polyethylene terephthalate sheet to form a laminate film. Using the above method, the peel strength between the polyethylene terephthalate plate and the bonding layer was measured to be 12 Newtons/cm. The peeling strength was measured to be 6 Newtons/cm after accelerated damp heat aging for 1 hour at 85t and 85%. 7, by using the above method, the peel strength between the joint layer and the ethylene-vinyl acetate copolymer seal was measured to be 8 Newtons/cm. 146091.doc 201100251 Preparation of Solar Modules The following components were stacked in the following order and laminated under vacuum with a vacuum to form a solar module. - 3.2 mm thick tempered glass purchased by Dongguan CSG Solar Glass Co_, Ltd.;

-EVA encapsulating film (5 〇〇 micron, used to make photovoltaic cell ruler to make EVA film, R767, available from Ruiyang Photovoltaic Material Co., Ltd.); _ polycrystalline 矽 photovoltaic circuit (125x125x0.3 mm, series 72 circuits); - EVA package film (5 〇〇 micrometer for the preparation of photovoltaic cell ruler to make EVA thin enamel, R767 'purchased by Ruiyang Photovoltaic Material Co., Ltd.); and - above embodiment 7 The disclosed laminate film has the above terpolymer facing the above EVA film. By using the above method, the assembled solar cell output power was determined to be 175 watts. The damp heat aging test of the solar cell element The hygrothermal aging test of the solar cell element was carried out by using the above method. The calculation result of the yellowing index ΔΥΙ was 〇.1. Example 8 A 25 micron thick TedlarTM polyvinyl fluoride film from Aibang was bonded to the major surface of a 2 inch thick polyethylene terephthalate sheet also available from DuPont. The adhesive used was a 9:1 (gravity/reset) visor of PP5250/I5200 polyurethane adhesive, which was purchased from Mitsubishi, Japan. The adhesive layer is 12 microns thick. 146091.doc •33· 201100251 On an extrusion-coating machine manufactured by Davis Standard, Ep〇min p_ 1〇5〇 (manufactured by Sakamoto Co., Ltd.) on polyethylene terephthalate plate - The main surface is coated as a 〇.5 〇 micron thick primer. Thereafter, the two ethylene copolymer layers are extruded-coated on the surface of the primer to form a laminate film: one layer is an ethylene methyl acrylate copolymer (2% by weight (weight/weight) is derived from methyl acrylate monomer), and One layer contains 5. /. Titanium dioxide and 丨0/〇2 SiO2 ethylene methacrylate copolymer (6% (weight/weight) derived from decyl acrylate monomer). By using the above method, the peel strength between the bonding layer and the polyethylene terephthalate sheet was determined to be 22 Newtons/cm. Take 85. The accelerated heat and humidity aging was carried out under conditions of 85% RH, and after a few hours, the peel strength was measured to be 18 Newtons/cm. By using the above method, the peel strength between the bonding layer and the ethylene-vinyl acetate copolymer package was determined to be 48 N/cm. Preparation of the solar module The following components are stacked in the following order, and laminated under vacuum with a vacuum to form a solar module: - 0 〇 1 ^ § \ ^] 1 € 30 8 〇 ^ 〇 1383 (3 〇. , 1 ^ (1. purchased 3.2 mm thick tempered glass; - EVA packaging film (50 〇 micro, used to prepare photovoltaic cells of Ruifu EVA film 'R767, by Ruiyang Photovoltaic Material Co.,

Ltd. purchased; - polycrystalline germanium photovoltaic circuit (125x 125x0.3 mm 'series 72 circuits); -EVA package film (5 μm, used to prepare photovoltaic cells Ruifu brand 146091.doc -34- 201100251 EVA A film, R767, available from Ruiyang Photovoltaic Material Co., Ltd.; and a laminated film disclosed in the above Example 8, having the above-mentioned copolymer facing the above EVA film. By using the above method, the assembled solar cell output was measured to be 178 watts. Humidity heat aging test of solar cell elements The wet aging test of solar cell elements was carried out by using the above method, and the yellowing index ΔΥΙ was calculated to be 0.1. From the above test results, it was observed that the laminate film of the present invention has improved joint strength between its film layers and thus is resistant to delamination. When the laminate film of the present invention is used to manufacture a solar module backsheet, there is improved joint strength between the backsheet and the encapsulation layer. As a result, the solar module using the laminated film of the present invention as a backing plate can not only prolong the service life, but also has an improved barrier property to prevent oxygen and moisture from penetrating into all the solar modules, thereby obtaining quite good effects. . 146091.doc 35-

Claims (1)

201100251 VII. Patent application scope: L A laminated film comprising: a polyester substrate comprising a surface of the second surface and a second surface, the package 2: a polymer that escapes into a group: a poly 2 Μ Μ 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 二 (c) a primer layer on the second surface of the polyester substrate, wherein the primer layer has a thickness of less than 0.99 microns; () is a bonding layer on the primer layer, wherein the bonding layer comprises ethylene: a copolymer of one or more monomers selected from the group consisting of: propylene 1, 4, fluorenyl acrylate, methacrylic acid, methacrylic acid, propylene acrylate, and cis-butyl Acid field; and (e) a protective layer on the adhesion layer of the hai, comprising a fluoropolymer having an elastic modulus greater than 150 Kpsi. 2. The laminate film of claim 3, wherein the polyester substrate further comprises a coating of a metal, a metal oxide or a non-metal oxide. 3. The laminate film according to the invention of claim 2, wherein the C2.6 alkyl diester is selected from the group consisting of: polyethylene terephthalate, polyethylene terephthalate, polypair Propylene phthalate, polybutylene terephthalate, poly(ethylene terephthalate), polyethylene phthalate, poly(phthalic acid) Butadiene ester and poly(phthalic acid) hexaester, and the poly(naphthalene dicarboxylate) C2·6 alkyl diester is selected from the group consisting of polyethylene naphthalate and polyethylene naphthalate. With the use of poly(naphthalene dicarboxylate). 146091.doc 201100251 4· The composition of the invention as described in the scope of claim 2 is selected from the group consisting of the following film, wherein the fluorine-containing poly-non-fluorinated, partially gas-soluble polymer, fluorine-containing And its dilute polymer, a copolymer of a partial gas, a rhodium, a polyglycol, a polymer, and a difluorinated monomer. Know the rat or perfluorinated 'fluorene difluoroethylene polymer, its non-fluorinated, partially fluorinated or perfluorinated monomer of ethylene and its polymer, tetraethylene ethylene * 甘 π /, sputum, a copolymer of tetrafluoroethylene. Oriented or perfluorinated single 5. The laminated thinned, partially gasified or fully vaporized single system according to item 4 of the scope of the patent application is selected from the group consisting of the following non-gas π ^ r pass groups: r , , C,, ethylene, difluoroethylene, vinylidene fluoride, chlorotrifluoroethylene, six propylene, tetrafluoroethylene, total gas oxyethylene propylene. The laminated enamel according to claim i, wherein the polyester substrate comprises: &amp; (a) comprising a layer of a copolymer selected from the group consisting of: phthalic acid a CM alkyl diester, a poly naphthalene dicarboxylic acid CM alkyl diester, a mixture or blend thereof; and (b) a layer comprising a polyvinyl fluoride or polyvinylidene fluoride. The laminate film according to claim 1, wherein the bonding layer comprises a copolymer of ethylene and one or more monomers selected from the group consisting of methyl methacrylate and acrylic acid. Methyl ester, mercaptopropionate, ethyl propionate, ethyl propyl acrylate, propyl acrylate, butyl acrylate, butyl acrylate, butyl methacrylate and cis-butyl 146091.doc 201100251 Adipic anhydride. 8. The laminate film of claim 7, wherein the ethylene is from 5 to 99% by weight based on the total weight of the copolymer. 9. The laminate film of claim 2, wherein the copolymer of the bonding layer is selected from the group consisting of ethylene methyl acrylate-mercapto acrylate terpolymer, ethylene butyl acrylate Ester_methacrylic acid terpolymer, ethylene-propyl methacrylate-acrylic acid terpolymer, ethylene-butyl acrylate-methyl propylene glycol propyl acrylate terpolymer and ethylene methacrylate-butylene Diacid anhydride trimer. 10. The laminate film of claim 9, wherein the copolymer is ethylene-butyl acrylate-glycidyl methacrylate terpolymer, and based on the weight of the terpolymer, acrylic acid The butyl ester is 2 to 30% by weight, and the glycidyl methacrylate is 丨 to 15% by weight. 11. The laminate film of claim 3, having a thickness of 10 to 400 microns. 12. The laminate as described in the scope of the patent application is extruded to be applied to the substrate. The laminated film according to the item of the invention, wherein the bonding system is a single layer of ethylene and one or more monomers selected from the group consisting of: acrylic acid Cl. Self-purpose, methacrylic acid Ci4g|, methyl propyl) s methacrylate propyl methacrylate and maleic anhydride. 14·If you apply for a patent scope! The layer (four) film of the item, wherein the joint 3 = a laminate having 2 to 8 layers, wherein each layer of the laminate is ethylene, a copolymer of one or more monomers of the group of the lower jaw : Acetone 460 I46091.doc 201100251 C 1 _ 4 S S, 曱 丙 嫌 嫌 P P P P P 酼 酼 酼 酼 酼 酼 酼 酼 酼 酼 酼 酼 酼 酼 酼 酼 酼 Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch 15. The laminated film of claim </ RTI> wherein the bonding layer further comprises one or more polymers selected from the group consisting of polymer n-ethylene (poly) 'ethylene-propylene copolymer, ethylene_methylpropionic acid h to copolymer; B-methacrylic acid copolymer; ethylene-cis-butyl anhydride copolymer; derived from ethyl acetophenone and selected from a common umbrella of at least two monomers of the following: alkyl methacrylate, methacrylic acid, butyl phthalate; acetaminophen and decanoic acid having at least one co-early substance selected from the group consisting of提: g 归 propyl acrylate containing methacrylic acid glycidyl acrylate copolymer: A A &amp; methacrylic acid C! 4 alkyl ester, methacrylic acid and maleic anhydride; a composition, wherein the polyethylene is selected from the group consisting of high density polyethylene, medium density polyethylene, low density polyethylene, linear low density polyethylene, metal aromatic-derived low density polyethylene, and the polypropylene is polypropylene homopolymer The laminated film of claim i, wherein the primer layer comprises an imine A laminate film according to the invention of claim 1, wherein the bonding layer comprises a polyurethane. A solar cell module, the white 丨s by, ,, 匕S sequentially from the front facing the sun side The position to the back-non-facing sun side is (4) a front plate, (8) encapsulated in a polymeric material - or a plurality of solar cells, and (4) - a back plate, wherein one or both of the front plate and the moon plate are 々孟々闻&amp; 1 = 1 two „月寻利| has been made of the laminated film described in item I. I4609l.doc 201100251 19 20. 21.G 22. 23. The solar cell module according to claim 18, wherein the solar cell is encapsulated with ethylene-vinyl acetate copolymer and the back The board is made of the laminated film described in claim 1 of the patent application. The solar cell module according to claim 18, wherein the solar cell is selected from the group consisting of a single crystal germanium solar cell, a polycrystalline germanium solar cell, and a nano-stone solar cell. A thin film solar cell module comprising: 0) a thin film solar cell placed on a glass plate, a polymer plate or a stainless steel plate; (b) a polymerizable package laminated on the thin film solar cell; c) The laminate is formed on the back sheet or the front panel of the package, wherein the back sheet or the front sheet is made of the laminated film described in claim 1 of the patent application. The thin film solar cell module of claim 21, wherein the polymerizable package comprises an ethylene-vinyl acetate copolymer. The thin film solar cell module according to claim 22, wherein the thin film solar cell is selected from the group consisting of an amorphous germanium thin film solar cell, a germanium braided thin film solar cell, and a copper indium gallium selenide thin film solar cell. 146091.doc 201100251 IV. Designated representative map: (1) The representative representative of the case is: (none) (2) The symbol of the symbol of the representative figure is simple: 5. If there is a chemical formula in this case, please reveal the best indication of the characteristics of the invention. Chemical formula: (none) 146091.doc