JP2017139285A - Rear surface protective sheet for solar cell module and method of manufacturing the sane, and method of manufacturing solar cell module - Google Patents
Rear surface protective sheet for solar cell module and method of manufacturing the sane, and method of manufacturing solar cell module Download PDFInfo
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- JP2017139285A JP2017139285A JP2016017872A JP2016017872A JP2017139285A JP 2017139285 A JP2017139285 A JP 2017139285A JP 2016017872 A JP2016017872 A JP 2016017872A JP 2016017872 A JP2016017872 A JP 2016017872A JP 2017139285 A JP2017139285 A JP 2017139285A
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- solar cell
- sheet
- cell module
- resin layer
- back surface
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- 150000003464 sulfur compounds Chemical class 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 229910000349 titanium oxysulfate Inorganic materials 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 239000011667 zinc carbonate Substances 0.000 description 1
- 229910000010 zinc carbonate Inorganic materials 0.000 description 1
- 235000004416 zinc carbonate Nutrition 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
Description
本発明は、太陽電池モジュール用裏面保護シート及びその製造方法並びに太陽電池モジュールの製造方法に関する。 The present invention relates to a back surface protection sheet for a solar cell module, a manufacturing method thereof, and a manufacturing method of a solar cell module.
太陽光発電は、無尽蔵で無公害の新たなエネルギー源として実用化されつつあり、このための太陽電池モジュールとしては、表面保護シート、封止材シート１、配線を配設した太陽光発電素子、封止材シート２、および裏面保護シートを積層し、一体化したものが広く知られている。 Photovoltaic power generation is being put into practical use as an inexhaustible and non-polluting new energy source. As a solar cell module for this purpose, a solar power generation element provided with a surface protection sheet, a sealing material sheet 1, wiring, A laminate in which the sealing material sheet 2 and the back surface protection sheet are laminated and integrated is widely known.
裏面保護シートは、太陽電池モジュールに組み込まれ、最近は設置後２０年〜３０年の長期にわたる品質保証を求められるなど、長期耐久性への要求は年々高まっており、とりわけ裏面保護シートと封止材シートとの密着性は、太陽光発電素子の保護、劣化防止の観点からの極めて重要な要求特性である。 The demand for long-term durability has been increasing year by year, such as the backside protection sheet is incorporated in solar cell modules and recently long-term quality assurance is required for 20 to 30 years after installation. Adhesion with the material sheet is a very important required characteristic from the viewpoint of protecting the photovoltaic power generation element and preventing deterioration.
さらに裏面保護シートは、直接太陽光にさらされることはないものの、設置方法によっては回り込みや照り返しによる太陽光が当たるため、裏面保護シートに耐光性を付与することは重要である。 Furthermore, although the back surface protection sheet is not directly exposed to sunlight, depending on the installation method, the back surface protection sheet is exposed to sunlight due to wraparound or reflection. Therefore, it is important to impart light resistance to the back surface protection sheet.
従来から用いられている裏面保護シートとしては、白色のポリフッ化ビニルフィルム（デュポン（株）“テドラー”（登録商標））が例示でき、該フィルムでポリエステルフィルムを挟んだ積層構成の裏面保護シートは当該用途で幅広く用いられている。ポリフッ化ビニルフィルムは耐光性に優れるが、高価であり太陽電池モジュールの低価格化の点では障害となる。またフッ素を含有しているため廃棄コストが高い問題を有する。これら課題を解消するため、耐候性、ガスバリア性に優れたポリエステル系フィルムを積層した構成も提案されている（特許文献１）。 As a back surface protection sheet conventionally used, a white polyvinyl fluoride film (DuPont Co., Ltd. “Tedlar” (registered trademark)) can be exemplified, and a back surface protection sheet having a laminated structure in which a polyester film is sandwiched between the films is Widely used in such applications. The polyvinyl fluoride film is excellent in light resistance, but is expensive and becomes an obstacle in terms of reducing the cost of the solar cell module. Moreover, since it contains fluorine, it has a problem of high disposal costs. In order to solve these problems, a configuration in which a polyester film excellent in weather resistance and gas barrier properties is laminated has also been proposed (Patent Document 1).
これらの構成の裏面保護シートにおいては、封止材シートと貼り合わせるための面が規定されており、太陽電池モジュール製造時において裏面保護シートの表裏を貼り間違えると封止材との密着強度が十分に発現しない問題があった。 In the back surface protection sheet of these configurations, the surface to be bonded to the encapsulant sheet is defined, and if the front and back of the back surface protection sheet are mistakenly adhered at the time of manufacturing the solar cell module, the adhesion strength with the encapsulant is sufficient There was a problem that did not occur.
本発明が解決しようとする課題は、太陽電池モジュールを製造するにあたり、裏面保護シートのどちらの面も封止材シートとの密着性を有し、裏面保護シートの表裏を区別することなく、太陽電池モジュールの熱圧着加工を行うことのできる裏面保護シートを提供することである。 The problem to be solved by the present invention is to manufacture a solar cell module, both surfaces of the back surface protection sheet have adhesiveness with the sealing material sheet, without distinguishing the front and back of the back surface protection sheet, It is providing the back surface protection sheet which can perform the thermocompression-bonding process of a battery module.
本発明は上記課題を解決するため、以下の構成とした。 In order to solve the above problems, the present invention has the following configuration.
第１の発明は、易接着性樹脂層（Ａ）／プラスチック基材（Ｂ）／易接着性樹脂層（Ａ）の積層構成からなる太陽電池モジュール用裏面保護シートであり、該易接着性樹脂層（Ａ）面と太陽電池モジュール用封止材シートとを加熱圧着成型した後の密着強度が５０Ｎ／ｃｍ以上である太陽電池モジュール用裏面保護シートである。 1st invention is a back surface protection sheet for solar cell modules which consists of laminated structure of an easily-adhesive resin layer (A) / plastic base material (B) / adhesive-adhesive resin layer (A), and this easily-adhesive resin It is a back surface protection sheet for solar cell modules whose adhesion strength after carrying out the thermocompression molding of the layer (A) surface and the solar cell module sealing material sheet is 50 N / cm or more.
第２の発明は、前記易接着性樹脂層（Ａ）の波長３６０ｎｍにおける光線透過率が５％以下あることを特徴とする。 The second invention is characterized in that a light transmittance at a wavelength of 360 nm of the easily adhesive resin layer (A) is 5% or less.
第３の発明は、前記プラスチック基材（Ｂ）の波長３６０ｎｍにおける光線透過率が５％以下であることを特徴とする第２の発明の太陽電池モジュール用裏面保護シートである。 3rd invention is the back surface protection sheet for solar cell modules of 2nd invention, wherein the light transmittance in wavelength 360nm of the said plastic base material (B) is 5% or less.
第４の発明は、前記易接着性樹脂層（Ａ）の波長３６０ｎｍにおける光線透過率が５％以下であることを特徴とする第３の発明の太陽電池モジュール用裏面保護シートである。 4th invention is the back surface protection sheet for solar cell modules of 3rd invention, wherein the light transmittance in wavelength 360nm of the said easily-adhesive resin layer (A) is 5% or less.
第５の発明は、前記プラスチック基材（Ｂ）が少なくとも２枚以上のプラスチックフィルムの積層体からなることを特徴とする。 The fifth invention is characterized in that the plastic substrate (B) is composed of a laminate of at least two plastic films.
第６の発明は、前記プラスチックフィルムの積層体の両側の最外層に用いるプラスチックフィルムが同一フィルムであり、該プラスチックフィルムの積層体が厚さ方向に対称であることを特徴とする第４の発明の太陽電池モジュール用裏面保護シートである。 According to a sixth aspect of the invention, the plastic films used for the outermost layers on both sides of the laminate of plastic films are the same film, and the laminate of the plastic films is symmetrical in the thickness direction. It is a back surface protection sheet for solar cell modules.
第７の発明は、温度６３℃、相対湿度３０％の雰囲気下、いずれか一方の易接着性樹脂層（Ａ）へ強度１０００Ｗ／ｍ２の紫外線を３１６時間照射した前後の色差（ΔＥ＊）が３以下であり、同照射前後における破断伸度保持率が７０％以上であることを特徴とする上記のいずれかの太陽電池モジュール用裏面保護シートである。 The seventh invention relates to a color difference (ΔE * ) before and after irradiating one of the easily-adhesive resin layers (A) with ultraviolet light having an intensity of 1000 W / m 2 for 316 hours in an atmosphere of a temperature of 63 ° C. and a relative humidity of 30%. Is a back protective sheet for a solar cell module according to any one of the above, wherein the elongation at break before and after irradiation is 70% or more.
第８の発明は、プラスチックフィルムの片面に、太陽電池モジュール用封止材シートとの密着性を有する易接着性樹脂層を塗布した部材を作製し、該部材の該易接着性樹脂層と反対側の面同士を対向させて接着剤で貼り合わせることを特徴とする太陽電池モジュール用裏面保護シートの製造方法である。 8th invention produces the member which apply | coated the easily adhesive resin layer which has adhesiveness with the sealing material sheet for solar cell modules on the single side | surface of a plastic film, and is opposite to this easily adhesive resin layer of this member It is a manufacturing method of the back surface protection sheet for solar cell modules characterized by making the surface of a side oppose and bonding together with an adhesive agent.
第９の発明は、プラスチックフィルムの片面に、太陽電池モジュール用封止材シートとの密着性を有する易接着性樹脂層を塗布した部材を作製し、該部材の該易接着性樹脂層と反対側の面同士を対向させ、少なくとも１枚のプラスチックフィルムを介して接着剤で貼り合わせることを特徴とする太陽電池モジュール用裏面保護シートの製造方法である。 9th invention produces the member which apply | coated the easily adhesive resin layer which has adhesiveness with the sealing material sheet | seat for solar cell modules on the single side | surface of a plastic film, and is opposite to this easily adhesive resin layer of this member It is a manufacturing method of the back surface protection sheet for solar cell modules characterized by making the surface of the side oppose and bonding together with an adhesive via at least one plastic film.
第１０の発明は、太陽電池モジュール用表面保護シート、封止材シート１、配線を配設した太陽光発電素子、封止材シート２、および裏面保護シートをこの順に積層し、加熱圧着成型により一体化することからなる太陽電池モジュールの製造方法であって、上記の発明のいずれかの裏面保護シートを用い、裏面保護シートのいずれかの面を封止材シート２に対向させて加熱圧着成型することを特徴とする太陽電池モジュールの製造方法である。 In the tenth aspect of the present invention, a solar cell module surface protective sheet, a sealing material sheet 1, a photovoltaic power generation element provided with wiring, a sealing material sheet 2, and a back surface protective sheet are laminated in this order, and thermocompression molding is performed. A method for manufacturing a solar cell module comprising integrating, using any one of the back surface protection sheets of the above invention, and thermocompression-bonding with either surface of the back surface protection sheet facing the sealing material sheet 2 It is the manufacturing method of the solar cell module characterized by doing.
本発明によれば、太陽電池モジュール用裏面保護シートのどちらの面も太陽電池モジュール用封止材シートとの密着性を有することで、太陽電池モジュール用裏面保護シートの表裏を区別することなく、太陽電池モジュールの熱圧着加工を行うことのできる太陽電池モジュール用裏面保護シートを提供することができる。 According to the present invention, both surfaces of the back surface protection sheet for solar cell modules have adhesion with the solar cell module sealing material sheet, without distinguishing the front and back of the back surface protection sheet for solar cell modules, The back surface protection sheet for solar cell modules which can perform the thermocompression bonding of a solar cell module can be provided.
以下、本発明の実施の形態を図面に基づいて詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
図１〜図４は、太陽電池モジュール用裏面保護シートの一実施形態の例を説明する概略断面図である。なお図に示すものは一実施形態であり、これらに限定されるものではない。 FIGS. 1-4 is a schematic sectional drawing explaining the example of one Embodiment of the back surface protection sheet for solar cell modules. In addition, what is shown to a figure is one Embodiment, It is not limited to these.
図１は耐光性を有するプラスチックフィルムの両面に耐光性を有する易接着性樹脂層を積層してなる太陽電池モジュール用裏面保護シートである。 FIG. 1 shows a back protective sheet for a solar cell module, in which an easy-adhesive resin layer having light resistance is laminated on both surfaces of a plastic film having light resistance.
図２はプラスチックフィルムの片面に耐光性を有する易接着性樹脂層を積層した部材を２枚、耐光性を有する易接着性樹脂層が最外層となるように接着剤で貼り合わせた太陽電池モジュール用裏面保護シートである。 FIG. 2 shows a solar cell module in which two members each having a light-resistant easy-adhesive resin layer laminated on one side of a plastic film are bonded together with an adhesive so that the light-resistant easy-adhesive resin layer is the outermost layer. It is a back surface protection sheet.
図３は耐光性を有するプラスチックフィルムの片面に易接着性樹脂層を積層した部材を２枚、易接着性樹脂層が最外層となるように接着剤で貼り合わせた太陽電池モジュール用裏面保護シートである。 FIG. 3 shows a back protective sheet for a solar cell module in which two members each having an easy-adhesive resin layer laminated on one side of a light-resistant plastic film are bonded together with an adhesive so that the easy-adhesive resin layer is the outermost layer. It is.
図４はプラスチックフィルムの片面に耐光性を有する易接着性樹脂層を積層した部材を２枚、白色フィルムを介して、耐光性を有する易接着性樹脂層が最外層となるように接着剤で貼り合わせた太陽電池モジュール用裏面保護シートである。 FIG. 4 shows an adhesive with two light-resistant easy-adhesive resin layers laminated on one side of a plastic film, with the light-resistant easy-adhesive resin layer being the outermost layer through a white film. It is the back surface protection sheet for solar cell modules bonded together.
まず、本発明におけるプラスチック基材（Ｂ）について説明する。 First, the plastic substrate (B) in the present invention will be described.
プラスチック基材（Ｂ）に用いられるプラスチックフィルムとしては、ポリエチレンテレフタレート（以下「ＰＥＴ」と略称する。）、ポリエチレンナフタレートなどのポリエステルフィルム、ポリエチレンやポリプロピレンなどのポリオレフィンフィルム、ポリスチレンフィルム、ポリアミドフィルム、ポリ塩化ビニルフィルム、ポリカーボネートフィルム、ポリアクリルニトリルフィルム、ポリイミドフィルム、フッ素系樹脂フィルム等である。これらの中で、機械的強度や耐熱性、経済性の点から、ＰＥＴフィルムが好ましく用いられ、長期間の特性維持が求められることから耐加水分解性ＰＥＴフィルムであることがより好ましく、具体的には東レ（株）製の“ルミラー”（登録商標）Ｘ１０Ｓなどが本発明のプラスチック基材（Ｂ）として好ましく用いることができる。 Examples of the plastic film used for the plastic substrate (B) include polyethylene terephthalate (hereinafter abbreviated as “PET”), polyester film such as polyethylene naphthalate, polyolefin film such as polyethylene and polypropylene, polystyrene film, polyamide film, poly Examples thereof include a vinyl chloride film, a polycarbonate film, a polyacrylonitrile film, a polyimide film, and a fluorine resin film. Among these, from the viewpoint of mechanical strength, heat resistance and economy, a PET film is preferably used, and since a long-term property maintenance is required, a hydrolysis-resistant PET film is more preferable. For example, “Lumirror” (registered trademark) X10S manufactured by Toray Industries, Inc. can be preferably used as the plastic substrate (B) of the present invention.
本発明におけるプラスチック基材（Ｂ）は、易接着性樹脂層（Ａ）との関係において、易接着性樹脂層（Ａ）に耐光性が付与されていない場合には耐光性が必要となり、易接着性樹脂層（Ａ）に耐光性が付与されている場合には耐光性を付与することが好ましい。本発明におけるプラスチック基材（Ｂ）には、長期の屋外暴露においても地面や屋根からの照り返しによる太陽電池裏面保護シート全体の色調変化や破断伸度劣化などの紫外線劣化を防止する機能を担うために、炭酸カルシウム、シリカ、アルミナ、水酸化マグネシウム、酸化亜鉛、タルク、カオリンクレー、酸化チタン、硫酸バリウム等の無機系の微粒子による白色化剤が添加されたものが好ましい。 The plastic base material (B) in the present invention requires light resistance when light resistance is not imparted to the easy-adhesion resin layer (A) in relation to the easy-adhesion resin layer (A). When light resistance is imparted to the adhesive resin layer (A), it is preferable to impart light resistance. The plastic substrate (B) according to the present invention has a function of preventing UV deterioration such as color change and breaking elongation deterioration of the entire solar cell back surface protection sheet due to reflection from the ground or roof even in long-term outdoor exposure. In addition, it is preferable to add a whitening agent with inorganic fine particles such as calcium carbonate, silica, alumina, magnesium hydroxide, zinc oxide, talc, kaolin clay, titanium oxide, and barium sulfate.
上記の様に耐光性が必要な場合は、プラスチック基材（Ｂ）の波長３６０ｎｍにおける光線透過率は５％未満とすることが必要であり、より好ましくは１％未満とすることで太陽電池裏面保護シート全体の色調変化や破断伸度劣化を小さくすることができる。このような耐光性を有するプラスチックフィルムとしては、白色化剤が添加された耐加水分解性ポリエチレンテレフタレート樹脂からなる耐加水分解性白色ＰＥＴフィルムである東レ（株）製の“ルミラー”ＭＧ１３や、耐加水分解性ポリエチレンテレフタレート樹脂層と白色化剤が添加された耐加水分解性ポリエチレンテレフタレート樹脂層が共押し出し成形された耐加水分解性白色ＰＥＴフィルムである東レ（株）製の“ルミラー”ＭＸ１１が好ましく用いることができる。 When light resistance is required as described above, the light transmittance at a wavelength of 360 nm of the plastic substrate (B) needs to be less than 5%, and more preferably less than 1%, so that the back surface of the solar cell It is possible to reduce the color tone change and the breaking elongation deterioration of the entire protective sheet. Examples of such a light-resistant plastic film include “Lumirror” MG13 manufactured by Toray Industries, Inc., which is a hydrolysis-resistant white PET film made of a hydrolysis-resistant polyethylene terephthalate resin to which a whitening agent is added. “Lumirror” MX11 manufactured by Toray Industries, Inc., which is a hydrolysis-resistant white PET film in which a hydrolyzable polyethylene terephthalate resin layer and a hydrolysis-resistant polyethylene terephthalate resin layer added with a whitening agent are co-extruded, is preferable. Can be used.
また、本発明におけるプラスチック基材（Ｂ）には、必要に応じて、例えば、帯電防止剤、紫外線吸収剤、安定剤、酸化防止剤、可塑剤、滑剤、充填剤、着色顔料等の添加剤を、本発明の効果を損なわない範囲内で添加した樹脂フィルムも用いることができる。 Further, the plastic substrate (B) in the present invention may contain additives such as an antistatic agent, an ultraviolet absorber, a stabilizer, an antioxidant, a plasticizer, a lubricant, a filler, and a color pigment as necessary. The resin film which added this in the range which does not impair the effect of this invention can also be used.
本発明におけるプラスチック基材（Ｂ）は単層であっても、複数のプラスチックフィルムを貼り合わせた多層フィルム積層体であってもよく、またプラスチック基材（Ｂ）の厚さは、特に制限されるものではないが、裏面保護シートの耐電圧特性、コスト等を勘案すると、２５〜３００μｍの範囲が好ましい。 The plastic substrate (B) in the present invention may be a single layer or a multilayer film laminate in which a plurality of plastic films are bonded together, and the thickness of the plastic substrate (B) is particularly limited. Although not intended, the range of 25 to 300 μm is preferable in view of the withstand voltage characteristics and cost of the back protective sheet.
本発明における易接着性樹脂層（Ａ）は、表面保護シート、封止材シート１、配線を配設した太陽光発電素子、封止材シート２、および裏面保護シートをこの順に積層し、加熱圧着成型により一体化する太陽電池モジュールの製造過程において、裏面保護シートと封止材シートとの密着力を決定する。 The easy-adhesion resin layer (A) in the present invention is obtained by laminating a surface protective sheet, a sealing material sheet 1, a photovoltaic power generation element provided with wiring, a sealing material sheet 2, and a back surface protective sheet in this order, and heating In the manufacturing process of the solar cell module integrated by pressure molding, the adhesion between the back surface protection sheet and the sealing material sheet is determined.
本発明における封止材シートとは代表的には、エチレン・酢酸ビニル共重合樹脂（ＥＶＡ）からなるシートである。本発明における易接着性樹脂層（Ａ）面と封止材シートと加熱圧着成型した後の密着強度が５０Ｎ／ｃｍ以上であることが重要である。加熱圧着成型した後の密着強度が５０Ｎ／ｃｍ未満であると、太陽電池モジュールの設計の初期仕様を満足できない。また、その密着強度を屋外で曝露される環境下でも長期にわたり維持する必要があり、封止材シートと加熱圧着成型した後の密着強度が、８５℃８５％ＲＨ条件下にて１０００時間保管後で、４０Ｎ／ｃｍ以上であることが好ましい。 The sealing material sheet in the present invention is typically a sheet made of ethylene / vinyl acetate copolymer resin (EVA). In the present invention, it is important that the adhesion strength of the surface of the easily adhesive resin layer (A), the sealing material sheet, and the thermocompression-bonded molding is 50 N / cm or more. When the adhesion strength after thermocompression molding is less than 50 N / cm, the initial specifications of the solar cell module design cannot be satisfied. Moreover, it is necessary to maintain the adhesive strength for a long time even in an environment exposed outdoors, and the adhesive strength after thermocompression bonding with the sealing material sheet is 1000 hours after storage at 85 ° C. and 85% RH. And it is preferable that it is 40 N / cm or more.
さらに、太陽電池モジュール前面から入射した光線のうち、配線を配設した太陽光発電素子間を抜けて封止材シート層を透過して裏面保護シートに到達する光に対して、光劣化反応を生じない耐性を示す樹脂を選定することが、長期にわたり密着性能を安定に維持するためには好ましい。従って、易接着性樹脂層（Ａ）を形成する樹脂（以下「易接着性樹脂」と称する。）は耐光性を有する樹脂が好ましく、アクリル系樹脂や、さらに耐光性に優れるフッ素系樹脂を用いることが好ましい。 Furthermore, among the light rays incident from the front surface of the solar cell module, the light deterioration reaction is caused with respect to the light that passes through the photovoltaic power generation elements provided with the wiring and passes through the sealing material sheet layer and reaches the back surface protection sheet. It is preferable to select a resin exhibiting resistance that does not occur in order to stably maintain the adhesion performance over a long period of time. Accordingly, the resin forming the easy-adhesive resin layer (A) (hereinafter referred to as “easily-adhesive resin”) is preferably a resin having light resistance, and an acrylic resin or a fluorine resin having further excellent light resistance is used. It is preferable.
アクリル系樹脂としては、アクリル樹脂、アクリルポリオール共重合体、アクリル／ウレタン共重合体などが用いられる。例えば“アクリナール”（東栄化成（株）製）、“アクリット”（登録商標）（大成ファインケミカル（株）製）、“ヒタロイド”（登録商標）（日立化成工業（株）製）、“アクリディック”（登録商標）（ＤＩＣ（株）製）、“ユーダブル”（登録商標）（（株）日本触媒製）、“ダイヤナール”（登録商標）（三菱レイヨン（株））などが挙げられる。ポリウレタン系樹脂としては、例えば、“サンプレン”（登録商標）（三洋化成工業（株）製）、“タケラック”(登録商標)（三井化学（株）製）、ＴＡ（日立化成ポリマー（株）製）、“セイカボンド”（登録商標）（大日精化工業（株）製）などが挙げられる。 As the acrylic resin, an acrylic resin, an acrylic polyol copolymer, an acrylic / urethane copolymer, or the like is used. For example, “Acrynal” (manufactured by Toei Kasei Co., Ltd.), “Akrit” (registered trademark) (manufactured by Taisei Fine Chemical Co., Ltd.), “Hitaroid” (registered trademark) (manufactured by Hitachi Chemical Co., Ltd.), “Acridick” (Registered Trademark) (manufactured by DIC Corporation), “U Double” (Registered Trademark) (manufactured by Nippon Shokubai Co., Ltd.), “Dianar” (registered trademark) (Mitsubishi Rayon Co., Ltd.), and the like. Examples of polyurethane resins include “Samprene” (registered trademark) (manufactured by Sanyo Chemical Industries), “Takelac” (registered trademark) (manufactured by Mitsui Chemicals), and TA (manufactured by Hitachi Chemical Co., Ltd.). ), “Seika Bond” (registered trademark) (manufactured by Dainichi Seika Kogyo Co., Ltd.), and the like.
フッ素系樹脂としては、構成単位の観点から、例えばパーフルオロオレフィン単位を主体とするパーフルオロオレフィン系樹脂が挙げられる。具体例としては、テトラフルオロエチレンの単独重合体（ＰＴＦＥ）、またはテトラフルオロエチレンとヘキサフルオロプロピレン、パーフルオロ（アルキルビニルエーテル）などとの共重合体、さらにはこれらと共重合可能な他の単量体との共重合体などが挙げられる。これらのうち、テトラフルオロエチレンを主体とするフッ素系樹脂が、顔料分散性や耐候性、共重合性、耐薬品性に優れている点で好ましく、例えばダイキン工業（株）製の“ゼッフル”（登録商標）ＧＫシリーズなどが例示できる。これらフッ素系樹脂は難燃性にも優れるため、太陽電池裏面保護シート用フィルムの難燃性を向上させる効果もある。 Examples of the fluorine-based resin include perfluoroolefin-based resins mainly composed of perfluoroolefin units from the viewpoint of structural units. Specific examples include a tetrafluoroethylene homopolymer (PTFE), a copolymer of tetrafluoroethylene with hexafluoropropylene, perfluoro (alkyl vinyl ether) or the like, and other monomers copolymerizable therewith. And a copolymer with the body. Of these, a fluororesin mainly composed of tetrafluoroethylene is preferable in terms of excellent pigment dispersibility, weather resistance, copolymerization, and chemical resistance. For example, “Zeffle” (manufactured by Daikin Industries, Ltd.) (Registered trademark) GK series and the like. Since these fluororesins are also excellent in flame retardancy, they also have the effect of improving the flame retardancy of the film for solar cell back surface protection sheet.
また、基材フィルムとの密着性を向上させるため、あるいは本発明の太陽電池モジュール用裏面保護シートは、太陽電池モジュール製造工程において、高温処理に曝されることから塗膜の耐熱性を向上させることを目的に、これらの耐侯性樹脂に架橋構造を形成することが好ましい。 Moreover, in order to improve adhesiveness with a base film, or the back surface protection sheet for solar cell modules of this invention improves the heat resistance of a coating film from being exposed to a high temperature process in a solar cell module manufacturing process. For this purpose, it is preferable to form a crosslinked structure in these weather resistant resins.
本発明における易接着性樹脂層（Ａ）の厚さは０．２〜１０μｍが好ましく、さらに好ましくは１〜５μｍである。この易接着性樹脂層（Ａ）を塗布方法により形成する場合、易接着性樹脂層（Ａ）の厚さが０．２μｍ未満であると、塗工時にはじきや膜切れといった現象を生じ易く、均一な塗膜を形成し難いために、基材フィルム（Ｂ）及び封止材シートに対する密着強度が十分に発現しない場合がある。一方、易接着性樹脂層（Ａ）の厚さが１０μｍを越えると、密着強度は十分に発現するが、塗布方法に制約を生じる、生産コストが高くなる、搬送ロールへの塗膜粘着やそれに伴う塗膜の剥がれ等を生じ易くなるなどの点が懸念される。 As for the thickness of the easily-adhesive resin layer (A) in this invention, 0.2-10 micrometers is preferable, More preferably, it is 1-5 micrometers. When this easy-adhesive resin layer (A) is formed by a coating method, if the thickness of the easy-adhesive resin layer (A) is less than 0.2 μm, a phenomenon such as repellency or film breakage tends to occur during coating, Since it is difficult to form a uniform coating film, the adhesion strength to the base film (B) and the sealing material sheet may not be sufficiently exhibited. On the other hand, when the thickness of the easy-adhesive resin layer (A) exceeds 10 μm, the adhesion strength is sufficiently developed, but the coating method is restricted, the production cost is increased, the adhesion of the coating film to the transport roll and the like There are concerns that the coating film will be easily peeled off.
本発明における易接着性樹脂層（Ａ）を塗布方法により形成するためのコーティング液の溶剤としては、例えば、トルエン、キシレン、酢酸エチル、酢酸ブチル、メチルエチルケトン、メチルイソブチルケトン、テトラヒドロフラン、ジメチルホルムアミド、ジメチルアセトアミド、メタノール、エタノールおよび水等を例示することができ、該コーティング液の性状としてはエマルジョン型および溶解型のいずれでも良い。 Examples of the solvent of the coating liquid for forming the easy-adhesion resin layer (A) in the present invention by a coating method include toluene, xylene, ethyl acetate, butyl acetate, methyl ethyl ketone, methyl isobutyl ketone, tetrahydrofuran, dimethylformamide, and dimethyl. Acetamide, methanol, ethanol, water and the like can be exemplified, and the properties of the coating liquid may be either emulsion type or dissolution type.
易接着性樹脂層（Ａ）をプラスチック基材（Ｂ）上に形成する方法は特に制限されるべきものではなく、公知の塗布手法を用いることができる。塗布手法としては、種々の方法を適用することができ、例えば、ロールコーティング法、ディップコーティング法、バーコーティング法、ダイコーティング法およびグラビアロールコーティング法等や、これらを組み合わせた方法を利用することができる。中でも、グラビアロールコーティング法は、易接着性樹脂層（Ａ）を安定して形成することができ一般的で好ましい方法である。 The method for forming the easy-adhesive resin layer (A) on the plastic substrate (B) is not particularly limited, and a known coating method can be used. As a coating method, various methods can be applied. For example, a roll coating method, a dip coating method, a bar coating method, a die coating method, a gravure roll coating method, or a combination of these methods can be used. it can. Among these, the gravure roll coating method is a general and preferable method that can stably form the easily adhesive resin layer (A).
本発明の易接着性樹脂層（Ａ）には、耐光性を付与する目的で無機系の着色顔料を添加することが好ましい。現在、太陽電池用裏面保護シートの外観は白色や黒色が主流であるが、本発明の目的のためには無機系の白色顔料を添加することが、易接着性樹脂層（Ａ）に耐光性を付与する目的のために好ましい。また、太陽電池モジュール内の電気配線パターンなどの設計パターンを目隠しできるという効果もある。 It is preferable to add an inorganic coloring pigment to the easily adhesive resin layer (A) of the present invention for the purpose of imparting light resistance. At present, white and black are mainly used for the appearance of the back surface protection sheet for solar cells, but for the purpose of the present invention, it is possible to add an inorganic white pigment to the easily adhesive resin layer (A). Is preferred for the purpose of imparting. In addition, there is an effect that a design pattern such as an electric wiring pattern in the solar cell module can be hidden.
白色顔料としては、耐光性に優れる酸化チタンが好ましい。発色の観点から、その数平均粒子径は０．１〜１．０μｍが好ましく、易接着性樹脂層（Ａ）に対する分散性やコストの観点からより好ましくは０．２〜０．５μｍである。 As the white pigment, titanium oxide having excellent light resistance is preferable. From the viewpoint of color development, the number average particle diameter is preferably from 0.1 to 1.0 μm, more preferably from 0.2 to 0.5 μm from the viewpoint of dispersibility with respect to the easily adhesive resin layer (A) and cost.
着色顔料の配合量に関しては、発色させたい色調の設計に合わせて適宜調整すれば良い。ただし、顔料配合量が少なすぎる場合には意匠性に優れた色調外観が得られないこと、耐光性能が不十分になること、逆に配合量が多すぎる場合にはコストが高くなること、樹脂層の硬度が大幅に増大すること、対封止材シートとの密着力の不足や低下を生じやすくなること、顔料が塗膜表面にブリードアウトするなどの懸念がある。 The blending amount of the color pigment may be appropriately adjusted according to the design of the color tone to be developed. However, if the amount of pigment is too small, a color appearance with excellent design properties cannot be obtained, light resistance is insufficient, and conversely, if the amount is too large, the cost is high, resin There are concerns that the hardness of the layer is greatly increased, that the adhesion to the sealing material sheet is likely to be insufficient or reduced, and that the pigment bleeds out to the surface of the coating film.
上記の理由から、着色顔料の配合量としては、易接着性樹脂１００質量部に対して、２０〜８０質量部が好ましく、より好ましくは３０〜７０質量部である。着色顔料が２０質量部未満だと適切な耐光性能が得られず、また８０質量部より多いと樹脂層が脆くなり適切な強度が得にくかったり、易接着性樹脂と着色剤の分散不良が発生して、耐光性能が低下したりする傾向がある。 For the above reason, the blending amount of the color pigment is preferably 20 to 80 parts by mass, more preferably 30 to 70 parts by mass with respect to 100 parts by mass of the easily adhesive resin. If the color pigment is less than 20 parts by mass, suitable light resistance cannot be obtained, and if it is more than 80 parts by mass, the resin layer becomes brittle and it is difficult to obtain an appropriate strength, or poor dispersion of easily adhesive resin and colorant occurs. As a result, the light resistance tends to decrease.
本発明における易接着性樹脂層（Ａ）は、フィルム基材（Ｂ）との関係において、フィルム基材（Ｂ）に耐光性が付与されていない場合には耐光性が必要であり、フィルム基材（Ｂ）に耐光性が付与されている場合には耐光性が付与されることが好ましい。 The easy-adhesive resin layer (A) in the present invention requires light resistance when the film base (B) is not light-resistant in relation to the film base (B). When light resistance is imparted to the material (B), it is preferable that light resistance is imparted.
本発明における易接着性樹脂層（Ａ）に耐光性が要求される場合は、波長３６０ｎｍにおける光線透過率が５％以下であることが必要である。波長３６０ｎｍにおける光線透過率が５％を超えると、耐光性が不十分となり、温度６３℃、相対湿度３０％の雰囲気下、易接着性樹脂層（Ａ）へ強度１０００Ｗ／ｍ２の紫外線を３１６時間照射した前後の裏面保護シートの色差（ΔＥ＊）が３を超えるか、破断伸度保持率が７０％未満となり裏面保護シートとしての耐光性に重大な悪影響を及ぼすことがある。 When light resistance is required for the easily adhesive resin layer (A) in the present invention, the light transmittance at a wavelength of 360 nm is required to be 5% or less. When the light transmittance at a wavelength of 360 nm exceeds 5%, the light resistance becomes insufficient, and an ultraviolet ray having an intensity of 1000 W / m 2 is applied to the easily adhesive resin layer (A) in an atmosphere of a temperature of 63 ° C. and a relative humidity of 30%. The color difference (ΔE * ) of the back surface protection sheet before and after the time irradiation exceeds 3 or the elongation at break is less than 70%, which may have a serious adverse effect on the light resistance as the back surface protection sheet.
また、本発明の易接着性樹脂層（Ａ）の耐熱性や機械特性を向上させる目的で前述のとおり架橋構造とすることが好ましく、易接着性樹脂層（Ａ）に導入した水酸基と反応し得る官能基を有する架橋剤を配合しても良い。架橋剤を併用した場合には、プラスチック基材（Ｂ）と易接着性樹脂層（Ａ）との間の密着力の向上、あるいは架橋構造の導入に伴う易接着性樹脂層（Ａ）の耐熱性向上といった効果が得られる。太陽電池モジュール製造工程のうち、ガラスラミネート工程において、易接着性樹脂層（Ａ）が最大１５０℃程度の高温下で、長い場合には３０分以上の熱処理に曝されるため、その環境下で樹脂層（塗膜）が溶融、流動などを示さないよう、特に耐熱性が要求される。本発明では、水酸基と反応し得る架橋剤としてポリイソシアネート系樹脂を硬化剤として使用し、ウレタン結合（架橋構造）の生成を促す処方が好ましい。架橋剤として用いるポリイソシアネート系樹脂としては、芳香族系ポリイソシアネート、芳香脂肪族系ポリイソシアネート、脂環族系ポリイソシアネートおよび脂肪族系ポリイソシアネート等が例示できる。中でもポリイソシアネートの原料としては、樹脂骨格中に紫外線域の光の吸収帯を有する芳香環を含有する樹脂は、紫外線照射に伴い黄変し易いことから、脂環族ポリイソシアネート及び脂肪族ポリイソシアネートを主成分とする硬化剤を用いることが好ましく、架橋反応の易進行性、架橋度、耐熱性、耐紫外線性などの観点からヘキサメチレンジイソシアネートのヌレート変性体が好ましい。 In addition, for the purpose of improving the heat resistance and mechanical properties of the easy-adhesive resin layer (A) of the present invention, it is preferable to have a crosslinked structure as described above, which reacts with the hydroxyl group introduced into the easy-adhesive resin layer (A). You may mix | blend the crosslinking agent which has a functional group to obtain. When a cross-linking agent is used in combination, improvement in adhesion between the plastic substrate (B) and the easy-adhesive resin layer (A), or heat resistance of the easy-adhesive resin layer (A) accompanying the introduction of a cross-linked structure The effect of improving the properties can be obtained. Among the solar cell module manufacturing processes, in the glass laminating process, the easy-adhesive resin layer (A) is exposed to a heat treatment at a maximum temperature of about 150 ° C. at a maximum of 30 minutes or longer. In particular, heat resistance is required so that the resin layer (coating film) does not show melting, flow, or the like. In this invention, the prescription which uses a polyisocyanate resin as a hardening | curing agent as a crosslinking agent which can react with a hydroxyl group as a hardening | curing agent, and promotes the production | generation of a urethane bond (crosslinked structure) is preferable. Examples of the polyisocyanate resin used as a crosslinking agent include aromatic polyisocyanates, araliphatic polyisocyanates, alicyclic polyisocyanates, and aliphatic polyisocyanates. Among them, as a polyisocyanate raw material, a resin containing an aromatic ring having a light absorption band in the ultraviolet region in the resin skeleton easily yellows upon irradiation with ultraviolet rays. Therefore, an alicyclic polyisocyanate and an aliphatic polyisocyanate. It is preferable to use a curing agent containing as a main component, and a nurate-modified product of hexamethylene diisocyanate is preferable from the viewpoint of easy progress of crosslinking reaction, degree of crosslinking, heat resistance, ultraviolet resistance and the like.
さらに、本発明の易接着性樹脂層（Ａ）には、その特性を損なわない限りにおいて、熱安定剤、酸化防止剤、強化剤、劣化防止剤、耐候剤、難燃剤、可塑剤、離型剤、滑剤、架橋助剤、顔料分散剤、消泡剤、レベリング剤、紫外線吸収剤、光安定剤、増粘剤、密着改良剤、つや消し剤などを添加してもよい。 Furthermore, the easy-adhesive resin layer (A) of the present invention has a heat stabilizer, an antioxidant, a reinforcing agent, a deterioration inhibitor, a weathering agent, a flame retardant, a plasticizer, a release agent, as long as the properties are not impaired. Agents, lubricants, crosslinking aids, pigment dispersants, antifoaming agents, leveling agents, UV absorbers, light stabilizers, thickeners, adhesion improvers, matting agents and the like may be added.
使用できる熱安定剤、酸化防止剤及び劣化防止剤としては、例えばヒンダードフェノール類、リン化合物、ヒンダードアミン類、硫黄化合物、銅化合物、アルカリ金属のハロゲン化物あるいはこれらの混合物が挙げられる。 Examples of heat stabilizers, antioxidants and deterioration inhibitors that can be used include hindered phenols, phosphorus compounds, hindered amines, sulfur compounds, copper compounds, alkali metal halides, and mixtures thereof.
使用できる強化剤としては、例えばクレー、タルク、炭酸カルシウム、炭酸亜鉛、ワラストナイト、シリカ、アルミナ、酸化マグネシウム、珪酸カルシウム、アルミン酸ナトリウム、アルミノ珪酸ナトリウム、珪酸マグネシウム、ガラスバルーン、カーボンブラック、酸化亜鉛、ゼオライト、ハイドロタルサイト、金属繊維、金属ウィスカー、セラミックウィスカー、チタン酸カリウムウィスカー、窒化ホウ素、グラファイト、ガラス繊維、炭素繊維などが挙げられる。 Examples of reinforcing agents that can be used include clay, talc, calcium carbonate, zinc carbonate, wollastonite, silica, alumina, magnesium oxide, calcium silicate, sodium aluminate, sodium aluminosilicate, magnesium silicate, glass balloon, carbon black, and oxidation. Examples include zinc, zeolite, hydrotalcite, metal fiber, metal whisker, ceramic whisker, potassium titanate whisker, boron nitride, graphite, glass fiber, and carbon fiber.
使用できる架橋助剤としては、従来公知のスズ系、他の金属系、有機酸系、アミノ系の架橋助剤が使用できる。 As the crosslinking aid that can be used, conventionally known tin-based, other metal-based, organic acid-based, and amino-based crosslinking aids can be used.
使用できる紫外線吸収剤としては、サリチル酸系、ベンゾフェノン系、ベンゾトリアゾール系、シアノアクリレート系等の紫外線吸収剤が例示できる。 Examples of the ultraviolet absorber that can be used include salicylic acid-based, benzophenone-based, benzotriazole-based, and cyanoacrylate-based ultraviolet absorbers.
使用できる光安定化剤としては、ヒンダードアミン系等の光安定化剤が挙げられる。 Examples of the light stabilizer that can be used include hindered amine light stabilizers.
本発明の太陽電池モジュール用裏面保護シートとしては、単膜のフィルム基材（Ｂ）の両面に易接着性樹脂層（Ａ）を積層してもよいし、プラスチックフィルムの片面に封止材シートとの密着性を有する易接着性樹脂層を塗布した部材を作製し、該部材の該易接着性樹脂層と反対側の面同士を対向させて接着剤で貼り合わせることで太陽電池モジュール用裏面保護シートとしてもよい。 As a back surface protection sheet for solar cell modules of this invention, an easily-adhesive resin layer (A) may be laminated | stacked on both surfaces of a single film film base material (B), and a sealing material sheet is provided on the single side | surface of a plastic film. A member coated with an easy-adhesive resin layer having adhesiveness to the surface, and the surface opposite to the easy-adhesive resin layer of the member are opposed to each other and bonded together with an adhesive, so that the back surface for the solar cell module It is good also as a protection sheet.
単膜のフィルム基材（Ｂ）の両面に易接着性樹脂層（Ａ）を積層する場合は、裏面保護シートとして必要な厚さを、その単膜のフィルム基材（Ｂ）で達成させる必要があるため、必然的にフィルム基材（Ｂ）が厚くなってしまい、そのためフィルム基材ロールの巻き長が短くなり、易接着性樹脂層（Ａ）を塗布等により積層する際に、フィルム基材ロールの架け替え作業が多くなり、生産性が低下してしまう。一方、プラスチックフィルムの片面に易接着性樹脂層を塗布した部材を上述の様に接着剤で貼り合わせる製造方法においては、薄番手のプラスチックフィルムに易接着性樹脂層を塗布することができるため、生産性良く加工することができる。 When laminating the easy-adhesive resin layer (A) on both surfaces of a single film film substrate (B), it is necessary to achieve the necessary thickness for the back surface protection sheet with the single film film substrate (B). Therefore, the film base (B) is inevitably thickened, so that the winding length of the film base roll is shortened, and when the easy-adhesive resin layer (A) is laminated by coating or the like, The work of replacing the material rolls increases, and the productivity decreases. On the other hand, in the manufacturing method in which a member coated with an easy-adhesive resin layer on one side of a plastic film is bonded with an adhesive as described above, an easy-adhesive resin layer can be applied to a thin plastic film, It can be processed with high productivity.
さらにプラスチックフィルムの片面に易接着性樹脂層を塗布した部材を接着剤で貼り合わせる場合には、間にに白色フィルム、金属酸化物蒸着層を有するバリアフィルム、太陽光発電素子から外部への放電を防止する絶縁フィルムなどのプラスチックフィルムから１つ以上を積層することにより、各種要求特性を満たす太陽電池モジュール用裏面保護シートを得ることができる。 Furthermore, when bonding a member with an easy-adhesive resin layer applied to one side of a plastic film with an adhesive, a white film, a barrier film having a metal oxide vapor deposition layer in between, a discharge from a photovoltaic power generation element to the outside By laminating one or more plastic films such as an insulating film for preventing the above, a back protective sheet for solar cell module that satisfies various required characteristics can be obtained.
白色フィルムとしては、ポリエチレンテレフタレートフィルムである東レ（株）製“ルミラー”Ｅ２０が例示できる。金属酸化物蒸着層を有するフィルムとしては、ポリエチレンテレフタレートフィルム基材上に酸化アルミニウム蒸着層が形成されてなる東レフィルム加工（株）製“バリアロックス”（登録商標）１０１１ＨＧが例示できる。絶縁フィルムとしては、ポリエチレンテレフタレートフィルムである東レ（株）製“ルミラー”Ｓ１０が例示できる。 Examples of the white film include “Lumirror” E20 manufactured by Toray Industries, Inc., which is a polyethylene terephthalate film. Examples of the film having a metal oxide deposition layer include “Barrier Rocks” (registered trademark) 1011HG manufactured by Toray Film Processing Co., Ltd., in which an aluminum oxide deposition layer is formed on a polyethylene terephthalate film substrate. An example of the insulating film is “Lumirror” S10 manufactured by Toray Industries, Inc., which is a polyethylene terephthalate film.
白色フィルムを積層した場合には光反射性や隠蔽性が向上し、金属酸化物蒸着層を有するフィルムを積層した場合には水蒸気遮断性が付与され、また絶縁フィルムを積層した場合には、裏面保護シートの厚さが増し、絶縁破壊電圧や部分放電電圧等の電気特性を向上させることができる。また、本発明における裏面保護シートに積層するフィルムは必ずしも１枚である必要はなく、付与したい特性に応じて、適宜各部材フィルムを組み合わせ、裏面保護シートを設計すれば良い。 When a white film is laminated, light reflectivity and concealment are improved, and when a film having a metal oxide vapor deposition layer is laminated, water vapor barrier properties are imparted, and when an insulating film is laminated, a back surface is provided. The thickness of the protective sheet is increased, and electrical characteristics such as dielectric breakdown voltage and partial discharge voltage can be improved. Moreover, the film laminated | stacked on the back surface protection sheet in this invention does not necessarily need to be one sheet, What is necessary is just to combine each member film suitably and to design a back surface protection sheet according to the characteristic to provide.
これらプラスチックフィルムを積層し、シート状に加工する手法としては、公知のドライラミネート法が利用できる。ドライラミネート法を用いた樹脂フィルムの貼り合わせには、ポリエーテルポリウレンタン系樹脂、ポリエステルポリウレタン系樹脂、ポリエステル系樹脂、ポリエポキシ系樹脂などの主剤とポリイソシアネート系の硬化剤とを含有成分とする公知のドライラミネート用接着剤を用いることができる。ただし、これらの接着剤を用いて形成される接着剤層には、接着強度が長期間の屋外使用で劣化することに起因する剥離を生じないこと、外観の悪化や光線反射率の低下につながる黄変を生じないことなどが必要である。また、接着剤層の厚さとしては、好ましくは１〜５μｍの範囲である。１μｍ未満であると十分な接着強度が得られ難い場合がある。一方、５μｍを越えると接着剤塗工のスピードが上がらず、さらには接着剤使用量が増加し生産コストの上昇につながる。 As a method of laminating these plastic films and processing them into a sheet shape, a known dry laminating method can be used. Bonding of the resin film using the dry laminating method includes a main component such as a polyether polyurethane resin, a polyester polyurethane resin, a polyester resin, a polyepoxy resin, and a polyisocyanate curing agent. A known dry laminating adhesive can be used. However, the adhesive layer formed using these adhesives does not cause peeling due to deterioration of the adhesive strength due to long-term outdoor use, which leads to deterioration in appearance and light reflectance. It is necessary not to cause yellowing. Moreover, as thickness of an adhesive bond layer, Preferably it is the range of 1-5 micrometers. If it is less than 1 μm, it may be difficult to obtain sufficient adhesive strength. On the other hand, if it exceeds 5 μm, the coating speed of the adhesive does not increase, and the amount of adhesive used increases, leading to an increase in production cost.
以下に、本発明の太陽電池モジュール用裏面保護シートを使用して太陽電池モジュールを製造する方法について説明する。表面保護シート、封止材シート１、配線を配設した太陽発電素子、封止材シート２、本発明の裏面保護シートをこの順に積層し、次いでこれらを真空吸引等により一体化して加熱圧着するラミネ−ション法等の通常の成形法を利用し、上記の各層を一体成形体として加熱圧着成形して、枠を装着して太陽電池モジュールを製造する。 Below, the method to manufacture a solar cell module using the back surface protection sheet for solar cell modules of this invention is demonstrated. The surface protective sheet, the sealing material sheet 1, the solar power generation element provided with the wiring, the sealing material sheet 2, and the back surface protective sheet of the present invention are laminated in this order, and then these are integrated by vacuum suction or the like and thermocompression bonded. Using a normal molding method such as a lamination method, the above-described layers are thermocompression-molded as an integrally molded body, and a frame is attached to manufacture a solar cell module.
上記の太陽電池モジュールを構成する表面保護シートは、太陽光の透過性、絶縁性、耐候性、耐熱性、耐光性、耐水性、防湿性、防汚性など物理的あるいは化学的強度性を有することが好ましい。上記の表面保護シートとしては、ガラス板等、ポリアミド系樹脂（各種のナイロン）、ポリエステル系樹脂、環状ポリオレフィン系樹脂、ポリスチレン系樹脂、（メタ）アクリル系樹脂、ポリカーボネート系樹脂、アセタ−ル系樹脂、その他等の各種の樹脂フィルムないしシートを使用することができる。 The surface protective sheet constituting the solar cell module has physical or chemical strength such as sunlight permeability, insulation, weather resistance, heat resistance, light resistance, water resistance, moisture resistance, and antifouling property. It is preferable. Examples of the surface protective sheet include glass plates, polyamide resins (various nylons), polyester resins, cyclic polyolefin resins, polystyrene resins, (meth) acrylic resins, polycarbonate resins, and acetal resins. Various resin films or sheets such as others can be used.
太陽電池モジュールを構成する光起電力素子としての太陽発電素子は、従来から公知のもの、例えば、単結晶シリコン型太陽発電素子、多結晶シリコン型太陽発電素子等の結晶シリコン太陽発電素子、シングル接合型あるいはタンデム構造型等からなるアモルファスシリコン太陽発電素子、ガリウムヒ素（ＧａＡｓ）やインジウム燐（ＩｎＰ）等のＩＩＩ−Ｖ族化合物半導体太陽発電素子、カドミウムテルル（ＣｄＴｅ）や銅インジウムセレナイド（ＣｕＩｎＳｅ２）等のＩＩ−ＶＩ族化合物半導体太陽発電素子、有機太陽発電素子、その他等を使用することができる。さらに、薄膜多結晶性シリコン太陽発電素子、薄膜微結晶性シリコン太陽発電素子、薄膜結晶シリコン太陽発電素子とアモルファスシリコン太陽発電素子とのハイブリット素子等も使用することができる。 The solar power generation element as a photovoltaic element constituting the solar cell module is a conventionally known solar power generation element, for example, a crystalline silicon solar power generation element such as a single crystal silicon type solar power generation element or a polycrystalline silicon type solar power generation element, a single junction Type or tandem structure type amorphous silicon solar power generation device, III-V compound semiconductor solar power generation device such as gallium arsenide (GaAs) or indium phosphorus (InP), cadmium tellurium (CdTe) or copper indium selenide (CuInSe 2) II-VI group compound semiconductor solar power generation elements, organic solar power generation elements, etc. can be used. Furthermore, a thin film polycrystalline silicon solar power generation element, a thin film microcrystalline silicon solar power generation element, a hybrid element of a thin film crystal silicon solar power generation element and an amorphous silicon solar power generation element, or the like can also be used.
封止材シート１、同２としては一般的にエチレン・酢酸ビニル共重合樹脂（ＥＶＡ）のシートが用いられる。 As the sealing material sheets 1 and 2, a sheet of ethylene / vinyl acetate copolymer resin (EVA) is generally used.
なお、本発明の太陽電池モジュール用裏面保護シートはどちらの面も封止材シートとの密着性を有していることから、裏面保護シートの表裏を区別することなく、太陽電池モジュールの熱圧着加工を行うことができるのが大きな特徴である。それにより裏面保護シートの表裏を管理、区分する必要がなく、太陽電池モジュール加工工程を簡略化することができ、また裏面保護シートの表裏貼り間違いによる不良発生等も防止することができる。 In addition, since the back surface protection sheet for solar cell modules of this invention has adhesiveness with a sealing material sheet | seat on either side, it does not distinguish the front and back of a back surface protection sheet, and is thermocompression bonding of a solar cell module. The main feature is that it can be processed. Thereby, it is not necessary to manage and separate the front and back surfaces of the back surface protection sheet, the solar cell module processing step can be simplified, and the occurrence of defects due to mistakes in attaching the front and back surfaces of the back surface protection sheet can be prevented.
次に、実施例を挙げて、具体的に本発明の太陽電池モジュール用裏面保護シートについて説明する。 Next, an Example is given and the back surface protection sheet for solar cell modules of this invention is demonstrated concretely.
［特性の評価方法］
本発明で用いた特性の評価方法は、下記のとおりである。
[Characteristic evaluation method]
The characteristic evaluation method used in the present invention is as follows.
（１）３６０ｎｍ波長での光線透過率
３６０ｎｍ波長の光線透過率を測定するため、（株）島津製作所製ＵＶ３１００−ＰＣを用いて、５ｃｍ角の試験片を使用して測定した。
(1) Light transmittance at a wavelength of 360 nm In order to measure the light transmittance at a wavelength of 360 nm, it was measured using a UV3100-PC manufactured by Shimadzu Corporation using a 5 cm square test piece.
プラスチック基材（Ｂ）については、プラスチック基材（Ｂ）単体を用いて測定し、接着性樹脂層（Ａ）の場合は、５０μｍのフッ素系フィルムであるＥＴＦＥフィルム”トヨフロン”（登録商標）５０Ｅの３６０ｎｍにおける光線透過率に対する、同フィルムに易接着性樹脂層（Ａ）を塗布したものの同透過率の差により、易接着性樹脂層（Ａ）の３６０ｎｍにおける光線透過率を求め、それぞれ３６０ｎｍでの光線透過率が５％未満であることにより耐光性を有すると判断した。 For the plastic substrate (B), measurement is performed using the plastic substrate (B) alone, and in the case of the adhesive resin layer (A), the ETFE film “Toyoflon” (registered trademark) 50E, which is a 50 μm fluorine-based film. The light transmittance at 360 nm of the easy-adhesive resin layer (A) was determined by the difference in the transmittance of the film obtained by applying the easy-adhesive resin layer (A) to the light transmittance at 360 nm of 360 nm, respectively. The light transmittance was determined to be light-resistant when it was less than 5%.
（２）封止材シートとの密着強度
封止材シートとしてサンビック（株）製エチレン・酢酸ビニル共重合体（ＥＶＡ）樹脂シート、ＰＶ−４５ＦＲ０００、厚さ４５０μｍを使用し、図６に示すように、裏面保護シート（６１）／離型フィルム（６５）／封止材シート２（６２）／封止材シート１（６３）／表面保護シート（６４）をこの順に積層し、（株）エヌ・ピー・シー製、太陽電池モジュールラミネーター（ＬＭ−５０×５０−Ｓ）に設置後、真空時間５分、制御時間１分、プレス時間９分、温度１４２℃の条件にて加熱圧着した。圧着後、室温冷却し、疑似モジュールを作製した。当該疑似モジュールを用い、裏面保護シート側から１ｃｍ幅にて裏面保護シート／封止材シート層間にて剥離し、室温２５℃条件下にて（株）ＯＲＩＥＮＴＥＣ製テンシロンＰＴＭ−５０を用いて、剥離角度１８０°、剥離スピード１００ｍｍ／ｍｉｎで剥離し、裏面保護シートと封止材シートの接着強度を測定した。裏面保護シートと封止材シートの接着強度が５０Ｎ／ｃｍ以上であることを実用範囲と判断した。
(2) Adhesive strength with the encapsulant sheet As the encapsulant sheet, an ethylene / vinyl acetate copolymer (EVA) resin sheet, PV-45FR000, having a thickness of 450 μm, manufactured by Sunvic Co., Ltd., is used, as shown in FIG. Are laminated in this order on the back surface protective sheet (61) / release film (65) / sealing material sheet 2 (62) / sealing material sheet 1 (63) / surface protection sheet (64).・ After installation on a solar cell module laminator (LM-50 × 50-S) manufactured by PCC, thermocompression bonding was performed under the conditions of a vacuum time of 5 minutes, a control time of 1 minute, a press time of 9 minutes, and a temperature of 142 ° C. After crimping, the module was cooled to room temperature to produce a pseudo module. Using the pseudo module, peeling between the backside protective sheet / sealing material sheet layer with a width of 1 cm from the backside protective sheet side, and peeling using Tensilon PTM-50 manufactured by ORIENTEC Co., Ltd. at room temperature of 25 ° C. Peeling was performed at an angle of 180 ° and a peeling speed of 100 mm / min, and the adhesive strength between the back surface protective sheet and the sealing material sheet was measured. It was judged as a practical range that the adhesive strength of a back surface protection sheet and a sealing material sheet was 50 N / cm or more.
（３）耐湿熱性評価
上記（２）と同様に疑似モジュールを作製し、エスペック社製恒温恒湿オーブンを用いて、８５℃、８５％ＲＨの環境下で１０００時間の湿熱処理を施した。その後、上記（２）の方法に従い封止材シートとの密着強度を測定し、裏面保護シートと封止材シートの接着強度が４０Ｎ／ｃｍ以上であることを実用範囲と判断した。
(3) Moisture and heat resistance evaluation A pseudo module was prepared in the same manner as in (2) above, and was subjected to a moist heat treatment for 1000 hours in an environment of 85 ° C and 85% RH using a constant temperature and humidity oven manufactured by Espec. Thereafter, the adhesion strength with the sealing material sheet was measured according to the method of (2) above, and it was judged that the adhesive strength between the back surface protection sheet and the sealing material sheet was 40 N / cm or more as a practical range.
（４）紫外線照射による色差（ΔＥ＊）
促進耐候性試験機である岩崎電気（株）アイスーパーＵＶテスターＳＵＶ−Ｗ１６１を用い、照度計を使用して、温度６３℃、相対湿度３０％の雰囲気下にて紫外線強度１０００Ｗ／ｍ２に調整した。本装置条件にて、本発明の太陽電池モジュール用裏面保護シートのいずれか一方の易接着性樹脂層（Ａ）側へ３１６時間紫外線照射を実施した。以下の式により照射を行った側の易接着性樹脂層（Ａ）面の紫外線照射前後の色差（ΔＥ＊）の測定を行った。なお、シートの幅方向３点のサンプリング箇所で当該加速試験と評価を行った。ΔＥ＊は、米国Ｘ−ｒｉｔｅ社製の色彩色差計ＳＰ６８を用いて、紫外線照射前後での紫外線吸収層のＬ＊ａ＊ｂ＊の測定により、ΔＥ＊：｛（（紫外線照射後のＬ＊）−（紫外線照射前のＬ＊））２＋（（紫外線照射後のａ＊）−（紫外線照射前のａ＊））２＋（（紫外線照射後のｂ＊）−（紫外線照射前のｂ＊））２｝１／２を算出した。標準光源には、ナトリウムメタルハライドランプＤ６５を使用した。幅方向３点の平均値で評価し、ΔＥ＊が３以下であれば色差が小さく、実用範囲と判断した。
(4) Color difference due to UV irradiation (ΔE * )
Using Iwasaki Electric Co., Ltd. Eye Super UV Tester SUV-W161, an accelerated weathering tester, using an illuminometer, the UV intensity is adjusted to 1000 W / m 2 in an atmosphere at a temperature of 63 ° C. and a relative humidity of 30%. did. Under the conditions of the present apparatus, ultraviolet irradiation was performed for 316 hours on the easily adhesive resin layer (A) side of any one of the back surface protective sheets for solar cell modules of the present invention. The color difference (ΔE * ) before and after the ultraviolet irradiation of the surface of the easily adhesive resin layer (A) on the irradiated side was measured by the following formula. In addition, the said acceleration test and evaluation were performed in the sampling location of 3 points | pieces of the sheet | seat width direction. ΔE * is determined by measuring L * a * b * of the ultraviolet absorbing layer before and after ultraviolet irradiation using a color difference meter SP68 manufactured by X-rite, USA, and is obtained by ΔE * : {((L * after ultraviolet irradiation) . )-(L * before UV irradiation)) 2 + ((a * after UV irradiation)-(a * before UV irradiation)) 2 + ((b * after UV irradiation)-(b before UV irradiation) * )) 2 } 1/2 was calculated. A sodium metal halide lamp D65 was used as the standard light source. Evaluation was made with an average value of three points in the width direction. If ΔE * was 3 or less, the color difference was small, and it was judged to be a practical range.
（５）破断伸度保持率
ＪＩＳ Ｃ２１５１（１９９６）に記載の測定方法で、幅１０ｍｍ長さ１５０ｍｍの試験片を用いて、チャック間の初期距離を１００ｍｍとし、３００ｍｍ／分の引張速度で、フィルムの破断伸度を測定した。
(5) Breaking elongation retention rate With the measuring method described in JIS C2151 (1996), using a test piece having a width of 10 mm and a length of 150 mm, the initial distance between chucks is set to 100 mm, and the film is pulled at a tensile speed of 300 mm / min. The elongation at break was measured.
上記（４）項と同じ紫外線照射を行い、紫外線照射前の破断伸度（ａ）に対し、紫外線照射後の破断伸度（ｂ）より、｛（ｂ）／（ａ）｝×１００（％）の数値を破断伸度保持率とした、評価はフィルムのＭＤ方向にそれぞれ５サンプルで行い、その平均値で評価し、破断伸度保持率が７０％以上を実用範囲と判断した。 The same ultraviolet irradiation as in the above item (4) is performed, and {(b) / (a)} × 100 (% from the breaking elongation (b) after ultraviolet irradiation with respect to the breaking elongation (a) before ultraviolet irradiation. The evaluation was carried out with 5 samples each in the MD direction of the film, and the average value was evaluated, and a breaking elongation retention of 70% or more was judged as the practical range.
［易接着樹脂層形成用塗料１の調製］
水酸基含有テトラフルオロエチレン系共重合樹脂と無機顔料として配合された酸化チタンを含むダイキン工業（株）製のコーティング剤“ゼッフル”（登録商標）ＧＫ５７０白（固形分濃度：６５質量％）１００重量部、ヌレート型ヘキサメチレンジイソシアネート樹脂である住化バイエル社製 “デスモジュール”（登録商標）Ｎ３３００（固形分濃度：１００質量％）４重量部および希釈剤として酢酸ｎ−ブチルを１２６重量部配合し、１５分間攪拌することにより耐光性の易接着性樹脂層形成用塗料１（固形分濃度３０質量％）を得た。
[Preparation of easy-adhesive resin layer-forming coating material 1]
100 parts by weight of a coating agent “Zeffle” (registered trademark) GK570 white (solid content concentration: 65% by mass) manufactured by Daikin Industries, Ltd. containing a hydroxyl group-containing tetrafluoroethylene copolymer resin and titanium oxide blended as an inorganic pigment 4 parts by weight of “Desmodur” (registered trademark) N3300 (solid content concentration: 100% by mass) manufactured by Sumika Bayer, which is a nurate type hexamethylene diisocyanate resin, and 126 parts by weight of n-butyl acetate as a diluent, By stirring for 15 minutes, a light-resistant easy-adhesive resin layer-forming coating material 1 (solid content concentration of 30% by mass) was obtained.
［易接着樹脂層形成用塗料２の調製］
アクリル系共重合ポリマーとブロックイソシアネート化合物を含有する東洋インキＳＣホールディングス株式会社製コーティング剤ＰＲＣ−００４（固形分濃度：３０質量％）１００重量部と希釈剤として酢酸ｎ−ブチルを２０重量部配合し、１５分間攪拌することにより易接着性樹脂層形成用塗料２（固形分濃度２５質量％）を得た。
[Preparation of easy-adhesive resin layer-forming coating material 2]
100 parts by weight of a coating agent PRC-004 (solid content concentration: 30% by mass) manufactured by Toyo Ink SC Holdings Co., Ltd. containing an acrylic copolymer and a blocked isocyanate compound, and 20 parts by weight of n-butyl acetate as a diluent By stirring for 15 minutes, an easy-adhesive resin layer-forming coating material 2 (solid content concentration 25% by mass) was obtained.
（実施例１）
プラスチックフィルムとして耐加水分解性白色ポリエチレンテレフタレートフィルム“ルミラー”ＭＧ１３（２５０μｍ）を準備した。このプラスチックフィルムの両面に順次、コロナ処理を施し、さらにワイヤーバーを用いて易接着性樹脂層形成用塗料１を塗布し、１５０℃で３０秒間乾燥し、乾燥後塗布量がそれぞれ１．０ｇ／ｍ２となるように耐光性易接着性樹脂層を設け、太陽電池モジュール用裏面保護シートとした。
Example 1
A hydrolysis-resistant white polyethylene terephthalate film “Lumirror” MG13 (250 μm) was prepared as a plastic film. The plastic film is sequentially corona-treated on both sides, and further coated with an easy-adhesive resin layer-forming coating material 1 using a wire bar and dried at 150 ° C. for 30 seconds. A light-resistant easy-adhesive resin layer was provided so as to be m 2 to obtain a back surface protective sheet for a solar cell module.
（実施例２）
プラスチックフィルムとして耐加水分解性ポリエチレンテレフタレートフィルム“ルミラー”Ｘ１０Ｓ（１２５μｍ）を準備した。このプラスチックフィルムの片面にコロナ処理を施し、さらにワイヤーバーを用いて易接着性樹脂層形成用塗料１を塗布し、１５０℃で３０秒間乾燥し、乾燥後塗布量が３．０ｇ／ｍ２となるように耐光性易接着性樹脂層を設け、部材１を製造した。
(Example 2)
A hydrolysis-resistant polyethylene terephthalate film “Lumirror” X10S (125 μm) was prepared as a plastic film. One side of this plastic film is subjected to corona treatment, and further, an easy-adhesive resin layer-forming coating material 1 is applied using a wire bar, dried at 150 ° C. for 30 seconds, and the coating amount after drying is 3.0 g / m 2 . A member 1 was manufactured by providing a light-resistant and easy-adhesive resin layer.
次に該部材１の耐光性易接着性樹脂層を形成した面とは反対側の面に、ワイヤーバーを用いてウレタン系接着剤層（東洋モートン（株）製ＡＤ５０３、１０重量部に同社製イソシアネート系硬化剤ＣＡＴ−１０を１重量部、混合した物）を固形分塗布量５ｇ／ｍ２となるように塗布、乾燥し、部材１の耐光性易接着性樹脂層を形成した面の反対側の面と６０Ｎ／ｃｍのニップ圧でラミネートを実施した。積層したフィルムは、温度４０℃にて７２時間エージングを実施し、接着剤層の硬化反応を促し、太陽電池モジュール用裏面保護シートとした。 Next, on the surface opposite to the surface on which the light-resistant and easy-adhesive resin layer of the member 1 is formed, a urethane-based adhesive layer (AD503 manufactured by Toyo Morton Co., Ltd., 10 parts by weight is manufactured by the same company using a wire bar. 1 part by weight of isocyanate curing agent CAT-10 mixed) is applied to a solid content of 5 g / m 2 and dried, opposite to the surface of the member 1 on which the light-resistant and easy-adhesive resin layer is formed Lamination was performed with the side surface and a nip pressure of 60 N / cm. The laminated film was aged at a temperature of 40 ° C. for 72 hours to promote the curing reaction of the adhesive layer, thereby forming a back surface protection sheet for a solar cell module.
（実施例３）
プラスチックフィルムとして、耐加水分解性ポリエチレンテレフタレート樹脂層と白色化剤が添加された耐加水分解性ポリエチレンテレフタレート樹脂層が共押し出し成形された耐加水分解性白色ポリエチレンテレフタレートフィルム“ルミラー”ＭＸ１１（１５０μｍ）を準備した。この “ルミラー”ＭＸ１１の白色化剤が添加された耐加水分解性ポリエチレンテレフタレート樹脂層面にコロナ処理を施し、さらにワイヤーバーを用いて易接着性樹脂層形成用塗料２を塗布し、１５０℃で３０秒間乾燥し、乾燥後塗布量が３．０ｇ／ｍ２となるように易接着性樹脂層を設け、部材２を製造した。
(Example 3)
As a plastic film, a hydrolysis-resistant white polyethylene terephthalate film “Lumirror” MX11 (150 μm) in which a hydrolysis-resistant polyethylene terephthalate resin layer and a hydrolysis-resistant polyethylene terephthalate resin layer added with a whitening agent are co-extruded is used. Got ready. The surface of the hydrolysis-resistant polyethylene terephthalate resin layer to which the whitening agent of “Lumirror” MX11 is added is subjected to corona treatment, and the coating material 2 for forming an easily adhesive resin layer is applied using a wire bar. The member 2 was manufactured by providing an easy-adhesive resin layer so that the coating amount after drying was 3.0 g / m 2 after drying for 2 seconds.
次に部材２の易接着性樹脂層を形成した面とは反対側の面同士を実施例２に記載の方法でラミネート、さらにエージングを行い、太陽電池モジュール用裏面保護シートとした。 Next, the surfaces opposite to the surface on which the easy-adhesive resin layer of the member 2 was formed were laminated and aged by the method described in Example 2 to obtain a back surface protection sheet for a solar cell module.
（実施例４）
プラスチックフィルムとして耐加水分解性ポリエチレンテレフタレートフィルム“ルミラー”Ｘ１０Ｓ（７５μｍ）を準備した。このプラスチックフィルムの片面にコロナ処理を施し、さらにワイヤーバーを用いて易接着性樹脂層形成用塗料２を塗布し、１５０℃で３０秒間乾燥し、乾燥後塗布量が３．０ｇ／ｍ２となるように易接着性樹脂層を設け、部材３を製造した。
Example 4
A hydrolysis-resistant polyethylene terephthalate film “Lumirror” X10S (75 μm) was prepared as a plastic film. One side of this plastic film is subjected to corona treatment, and further, an easy-adhesive resin layer forming coating 2 is applied using a wire bar, dried at 150 ° C. for 30 seconds, and the coating amount after drying is 3.0 g / m 2 . The member 3 was manufactured by providing an easy-adhesive resin layer.
さらに白色フィルムとしてポリエチレンテレフタレートフィルム“ルミラー”Ｅ２０（５０μｍ）を準備し、２枚の部材３の易接着性樹脂層が最外層になり、またＳ１０が中間層になるように実施例２に記載の方法でラミネート、さらにエージングを行い、太陽電池モジュール用裏面保護シートとした。 Further, a polyethylene terephthalate film “Lumirror” E20 (50 μm) is prepared as a white film, and the easy-adhesive resin layer of the two members 3 is the outermost layer, and S10 is an intermediate layer. Lamination and further aging were performed by the method to obtain a back surface protection sheet for a solar cell module.
各実施例の太陽電池モジュール用裏面保護シートの構成と特性を表１に示した。 Table 1 shows the configuration and characteristics of the back surface protective sheet for solar cell module of each example.
本発明の太陽電池モジュール用裏面保護シートによれば、裏面保護シートのどちらの面も封止材シートとの密着性を有することで、裏面保護シートの表裏を区別することなく、太陽電池モジュールの熱圧着加工を行うことができ、生産管理の容易な裏面保護シートを提供することができる。 According to the back surface protection sheet for a solar cell module of the present invention, both surfaces of the back surface protection sheet have adhesiveness to the sealing material sheet, so that the front and back surfaces of the back surface protection sheet are not distinguished from each other. It is possible to provide a back surface protection sheet that can be subjected to thermocompression bonding and easy to manage production.
１１：耐光性易接着性樹脂層
１２：耐光性プラスチックフィルム
２１：耐光性易接着性樹脂層
２２：プラスチックフィルム
２３：接着剤層
３１：易接着性樹脂層
３２：耐光性プラスチックフィルム
３３：接着剤層
４１：耐光性易接着性樹層
４２：プラスチックフィルム
４３：白色フィルム
４４：接着剤層
５１：裏面保護シート
５２：封止材シート層２
５３：封止材シート層１
５４：表面保護シート
５５：配線を配設した太陽発電素子
６１：裏面保護シート
６２：封止材シート層２
６３：封止材シート層１
６４：表面保護シート
６５：離型フィルム
11: Light resistant easily adhesive resin layer 12: Light resistant plastic film 21: Light resistant easily adhesive resin layer 22: Plastic film 23: Adhesive layer 31: Easy adhesive resin layer 32: Light resistant plastic film 33: Adhesive Layer 41: Light-resistant easy-adhesive tree layer 42: Plastic film 43: White film 44: Adhesive layer 51: Back surface protection sheet 52: Sealing material sheet layer 2
53: Sealant sheet layer 1
54: Surface protective sheet 55: Solar power generation element 61 with wiring disposed thereon: Back surface protective sheet 62: Sealing material sheet layer 2
63: Sealant sheet layer 1
64: Surface protection sheet 65: Release film
Claims (10)
It consists of laminating | stacking the surface protection sheet for solar cell modules, the sealing material sheet 1, the photovoltaic power generation element which arrange | positioned the wiring, the sealing material sheet 2, and the back surface protection sheet in this order, and thermocompression molding. It is a manufacturing method of a solar cell module, Comprising: Using the back surface protection sheet in any one of Claims 1-7, either surface of a back surface protection sheet is made to oppose the sealing material sheet 2, and thermocompression molding is carried out. The manufacturing method of the solar cell module characterized by these.
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| JP2016017872A JP2017139285A (en) | 2016-02-02 | 2016-02-02 | Rear surface protective sheet for solar cell module and method of manufacturing the sane, and method of manufacturing solar cell module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019053300A (en) * | 2017-09-13 | 2019-04-04 | 住友ベークライト株式会社 | Cover member |
| CN115172497A (en) * | 2022-08-31 | 2022-10-11 | 一道新能源科技(衢州)有限公司 | Double-sided coated laminated solar cell and preparation method thereof |
-
2016
- 2016-02-02 JP JP2016017872A patent/JP2017139285A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019053300A (en) * | 2017-09-13 | 2019-04-04 | 住友ベークライト株式会社 | Cover member |
| CN115172497A (en) * | 2022-08-31 | 2022-10-11 | 一道新能源科技(衢州)有限公司 | Double-sided coated laminated solar cell and preparation method thereof |
| CN115172497B (en) * | 2022-08-31 | 2024-01-26 | 一道新能源科技股份有限公司 | Double-sided coated laminated solar cell and preparation method thereof |
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