JP2002134770A - Rear-surface protective sheet for solar cell - Google Patents
Rear-surface protective sheet for solar cellInfo
- Publication number
- JP2002134770A JP2002134770A JP2000322490A JP2000322490A JP2002134770A JP 2002134770 A JP2002134770 A JP 2002134770A JP 2000322490 A JP2000322490 A JP 2000322490A JP 2000322490 A JP2000322490 A JP 2000322490A JP 2002134770 A JP2002134770 A JP 2002134770A
- Authority
- JP
- Japan
- Prior art keywords
- solar cell
- weather
- resistant
- heat
- polyester resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
【０００１】[0001]
【発明の属する技術分野】本発明は、長期間にわたる過
酷な自然環境に耐え得る耐熱性、耐候性、防湿性、その
他の諸特性に優れ、かつ、安価な太陽電池用裏面保護シ
ートに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inexpensive backside protective sheet for a solar cell which has excellent heat resistance, weather resistance, moisture proofness and other properties capable of withstanding a severe natural environment for a long period of time. is there.
【０００２】[0002]
【従来の技術】近年、地球温暖化問題に対する内外各方
面の関心が高まる中、二酸化炭素の排出抑制のために、
種々努力が続けられている。化石燃料の消費量の増大
は、大気中の二酸化炭素の増加をもたらし、その温室効
果により地球の気温が上昇し、地球環境に重大な影響を
及ぼす。化石燃料に代替えするエネルギーとしては、い
ろいろ検討されているが、クリーンなエネルギー源であ
る太陽光発電に対する期待が高まっている。太陽電池は
太陽光のエネルギーを直接電気に換える太陽光発電シス
テムの心臓部を構成するものであり、半導体からできて
いる。その構造としては、太陽電池素子単体をそのまま
の状態で使用することはなく、一般的に数枚〜数十枚の
太陽電池素子を直列、並列に配線し、長期間（約２０
年）に亘って素子を保護するため種々パーケージングが
行われ、ユニット化されている。このパッケージに組み
込まれたユニットを太陽電池モジュールと呼び、一般的
に太陽光が当たる面をガラスで覆い、熱可塑性プラスチ
ックからなる充填材で間隙を埋め、裏面を耐熱、耐候性
プラスチック材料などのシートで保護された構成になっ
ている。2. Description of the Related Art In recent years, as concerns of global warming have been increasing in various areas both inside and outside the country, to suppress carbon dioxide emissions,
Various efforts are being made. Increased consumption of fossil fuels leads to increased carbon dioxide in the atmosphere, which increases the temperature of the earth due to its greenhouse effect and has a significant impact on the global environment. Various alternatives to fossil fuels have been studied, but expectations for solar power, a clean energy source, are increasing. A solar cell forms the heart of a photovoltaic power generation system that directly converts the energy of sunlight into electricity, and is made of semiconductors. As a structure thereof, a single solar cell element is not used as it is, but generally several to several tens of solar cell elements are wired in series and parallel, and a long time (about 20
For various years, various packagings are performed to protect the elements, and they are unitized. The unit incorporated in this package is called a solar cell module. Generally, the surface exposed to sunlight is covered with glass, the gap is filled with a filler made of thermoplastic plastic, and the back surface is made of a sheet of heat-resistant and weather-resistant plastic material. The configuration is protected by
【０００３】これらの太陽電池モジュールは、屋外で使
用されるため、その構成、材質構造などにおいて、十分
な耐久性、耐候性が要求される。特に、裏面保護シート
は耐候性と共に水蒸気透過率の小さいことが要求され
る。これは水分の透過により充填材が剥離、変色した
り、配線の腐蝕を起こした場合、モジュールの出力その
ものに影響を及ぼす恐れがあるためである。[0003] Since these solar cell modules are used outdoors, they are required to have sufficient durability and weather resistance in the structure, material structure and the like. In particular, the backside protective sheet is required to have low water vapor transmission rate as well as weather resistance. This is because when the filler is peeled off or discolored due to the permeation of moisture, or when the wiring is corroded, the output of the module itself may be affected.
【０００４】従来より、この太陽電池用裏面保護シート
としては、ポリフッ化ビニルフイルム（商品名：テドラ
ー）でアルミニウム箔をサンドイッチした積層構造の裏
面保護シートが多く用いられていた。しかし、このポリ
フッ化ビニルフイルムは機械的強度も低く、太陽電池モ
ジュール作成時に加えられる１４０℃〜１５０℃の熱プ
レスの熱により軟化し、太陽電池素子電極部の突起物が
充填材層を貫通し、さらに裏面保護シートを構成する内
面のポリフッ化ビニルフイルムを貫通し、裏面保護シー
ト中の金属箔に接触することにより、太陽電池素子と金
属箔が短絡して電池性能に悪影響を及ぼすという欠点が
あったと同時に高価であり、太陽電池モジュールの低価
格化の点で一つの障害となっている。Hitherto, as this back sheet for solar cells, a back sheet having a laminated structure in which an aluminum foil is sandwiched by a polyvinyl fluoride film (trade name: Tedlar) has been used in many cases. However, this polyvinyl fluoride film has low mechanical strength, and is softened by the heat of a hot press at 140 ° C. to 150 ° C. which is applied at the time of manufacturing the solar cell module, so that the protrusions of the solar cell element electrode penetrate the filler layer. In addition, by penetrating the polyvinyl fluoride film on the inner surface constituting the back protection sheet and coming into contact with the metal foil in the back protection sheet, the short circuit between the solar cell element and the metal foil adversely affects battery performance. At the same time, it is expensive and is an obstacle in reducing the price of the solar cell module.
【０００５】[0005]
【発明が解決しようとする課題】これらの欠点及び障害
を改善するために、例えばアクリルフイルム、塩化ビニ
ルフイルム、汎用のポリエステルフイルム、ポリカーボ
ネートフイルム、ポリフッ化ビニリデンフイルムその他
の種々の代替えフイルムを積層した太陽電池用裏面保護
シートが検討されてきたが、耐熱性、耐候性、防湿性等
の諸機能を有し、かつ、安価な太陽電池用裏面保護シー
トはまだ提供されていない。In order to remedy these drawbacks and obstacles, for example, an acrylic film, a vinyl chloride film, a general-purpose polyester film, a polycarbonate film, a polyvinylidene fluoride film and various other alternative films are laminated. Although a back surface protection sheet for a battery has been studied, an inexpensive back surface protection sheet for a solar cell having various functions such as heat resistance, weather resistance and moisture resistance has not yet been provided.
【０００６】そこで本発明の課題は、太陽電池用裏面保
護シートとして、耐熱性、耐候性、防湿性その他の要求
される諸機能を有し、かつ、ポリエステル樹脂からなる
安価な耐熱、耐候性プラスチックフイルムを積層した構
成の積層体を提供することにある。Accordingly, an object of the present invention is to provide an inexpensive heat-resistant and weather-resistant plastic made of a polyester resin which has heat resistance, weather resistance, moisture resistance and other required functions as a back protective sheet for a solar cell. An object of the present invention is to provide a laminate having a configuration in which films are laminated.
【０００７】[0007]
【課題を解決するための手段】本発明の請求項１に係る
発明は、固有粘度が０．６（ｄｌ／ｇ）以上で、かつ、
環状三量体含有量が０．５重量％以下のポリエステル樹
脂からなる耐熱、耐候性プラスチックフイルムを積層し
た積層体からなることを特徴とする太陽電池用裏面保護
シートである。The invention according to claim 1 of the present invention has an intrinsic viscosity of 0.6 (dl / g) or more, and
A backsheet for a solar cell, comprising a laminate of heat-resistant and weather-resistant plastic films made of a polyester resin having a cyclic trimer content of 0.5% by weight or less.
【０００８】次に、請求項２に係る発明は、上記請求項
１に係る発明において、前記ポリエステル樹脂からなる
耐熱、耐候性プラスチックフイルムが、金属箔をその両
面からサンドイッチした構成の積層体からなることを特
徴とする太陽電池用裏面保護シートである。Next, according to a second aspect of the present invention, in the first aspect of the present invention, the heat-resistant and weather-resistant plastic film made of the polyester resin comprises a laminate in which a metal foil is sandwiched from both sides thereof. It is a back surface protection sheet for solar cells characterized by the above-mentioned.
【０００９】[0009]
【作用】本発明によれば、太陽電池用裏面保護シートと
して、固有粘度が０．６（ｄｌ／ｇ）以上で、かつ、環
状三量体含有量が０．５重量％以下のポリエステル樹脂
からなる耐熱、耐候性プラスチックフイルムで、両側か
ら金属箔をサンドイッチしている為、安価で、かつ、長
期間の屋外使用に耐え得る諸機能を有する。According to the present invention, as a backside protective sheet for a solar cell, a polyester resin having an intrinsic viscosity of 0.6 (dl / g) or more and a cyclic trimer content of 0.5% by weight or less is used. Since it is a heat-resistant and weather-resistant plastic film with metal foil sandwiched from both sides, it has various functions that are inexpensive and can withstand long-term outdoor use.
【００１０】[0010]
【発明の実施の形態】本発明の太陽電池用裏面保護シー
トを、実施の形態に沿って以下に詳細に説明する。BEST MODE FOR CARRYING OUT THE INVENTION A backsheet for a solar cell according to the present invention will be described in detail below along with embodiments.
【００１１】図１は本発明の太陽電池用裏面保護シート
１０の一実施の形態を示す側断面図であり、シートの厚
み方向に順に、耐熱、耐候性プラスチックフイルム１、
接着剤層４、金属箔２、接着剤層５、耐熱、耐候性プラ
スチックフイルム３が積層されている。FIG. 1 is a side sectional view showing one embodiment of a back surface protective sheet 10 for a solar cell according to the present invention, in which a heat-resistant and weather-resistant plastic film 1 is sequentially arranged in the thickness direction of the sheet.
An adhesive layer 4, a metal foil 2, an adhesive layer 5, and a heat-resistant and weather-resistant plastic film 3 are laminated.
【００１２】本発明の太陽電池用裏面保護シート１０
は、耐熱、耐候性プラスチックフイルム１及び３で、接
着剤層４及び５を介して、両側から金属箔２をサンドイ
ッチした構成になっているので、外部からの機械的圧
力、衝撃などにより金属箔２にピンホールが発生するこ
とがなく、かつ、太陽電池モジュール製造時の熱プレス
工程の際に加えられる熱により、溶融したり劣化したり
することがなく、しかも、太陽電池として実際に使用さ
れる長期間の屋外暴露においても太陽光、降雨等により
劣化しない。本発明の太陽電池用裏面保護シート１０に
使用される耐熱、耐候性プラスチックフイルム１及び３
は、特に熱プレスの際、通常１５０℃程度の熱が加えら
れるので、１５０℃以下の温度では溶融軟化しない樹脂
フイルムである必要がある。また、従来使用されていた
白色ポリフッ化ビニルフイルムより高い耐熱性と強度を
有し、長期間での屋外使用に耐える耐候性を有し、か
つ、より安価なものである必要がある。The backsheet 10 for a solar cell according to the present invention.
Is a heat-resistant and weather-resistant plastic film 1 and 3 in which the metal foil 2 is sandwiched from both sides via the adhesive layers 4 and 5, so that the metal foil 2 2 does not generate pinholes, and does not melt or deteriorate due to the heat applied during the hot pressing step in the manufacture of the solar cell module. It does not deteriorate due to sunlight, rainfall, etc., even during long-term outdoor exposure. Heat and weather resistant plastic films 1 and 3 used for the backsheet 10 for solar cells of the present invention.
In particular, since heat of about 150 ° C. is usually applied during hot pressing, it is necessary that the resin film does not melt and soften at a temperature of 150 ° C. or less. Further, it is necessary to have higher heat resistance and strength than a conventionally used white polyvinyl fluoride film, have weather resistance to withstand outdoor use for a long period of time, and be more inexpensive.
【００１３】本発明の太陽電池用裏面保護シート１０に
使用するフイルムとしては、固相重合法で重合された、
固有粘度が０．６（ｄｌ／ｇ）以上で、かつ、環状三量
体含有量が０．５重量％以下のポリエステル樹脂からな
る耐熱、耐候性プラスチックフイルムである必要があ
る。環状三量体を多く含むポリマーは、高温高湿時の加
水分解が促進され易い。環状三量体含有量を０．５重量
％以下にすることにより、高温高湿時の加水分解を抑え
ることが出来るので、耐熱、耐候性に優れたフイルムが
得られる。一般的に使用されるポリエステル樹脂フイル
ムは、環状三量体含有量が０．５重量％を超えるので、
屋外などでの長期暴露により機械的強度も劣化し、加水
分解して亀裂などが生じ好ましくない。The film used for the backsheet 10 for a solar cell of the present invention is a film polymerized by a solid phase polymerization method.
The heat-resistant and weather-resistant plastic film must be made of a polyester resin having an intrinsic viscosity of 0.6 (dl / g) or more and a cyclic trimer content of 0.5% by weight or less. Polymers containing a large amount of cyclic trimers tend to be easily hydrolyzed at high temperature and high humidity. When the content of the cyclic trimer is 0.5% by weight or less, hydrolysis at high temperature and high humidity can be suppressed, so that a film having excellent heat resistance and weather resistance can be obtained. Since a generally used polyester resin film has a cyclic trimer content of more than 0.5% by weight,
The mechanical strength is also deteriorated by long-term exposure outdoors or the like.
【００１４】なお、ポリエステル樹脂としては、ポレエ
チレンテレフタレート、ポリブチレンテレフタレート、
ポリエチレンナフタレート、ポリブチレンナフタレー
ト、ポリエチレンイソフタレート若しくはこれらの二種
以上からなる共重合ポリエステルなどのいずれを用いて
も良い。The polyester resin includes polyethylene terephthalate, polybutylene terephthalate,
Any of polyethylene naphthalate, polybutylene naphthalate, polyethylene isophthalate, and a copolyester composed of two or more of these may be used.
【００１５】上記環状三量体含有量の測定方法は、ポリ
マー１００ｍｇをオルトクロロフェノール２ｍｌに溶解
し、液体クロマトグラフィーにて測定し、ポリマーに対
する重量％を測定する方法で求める。The content of the cyclic trimer is determined by dissolving 100 mg of the polymer in 2 ml of orthochlorophenol, measuring the content by liquid chromatography, and measuring the weight% of the polymer.
【００１６】また、この太陽電池用裏面保護シート１０
に使用する耐熱、耐候性プラスチックフイルム１及び３
は、透明なものでも良いが、紫外線をフイルム表面で乱
反射し、フイルム内部への紫外線の透過を防止し、素子
の発電能力を増すことが出来るように、ポリエステル樹
脂１００重量部に対し酸化チタン等の白色顔料を５〜２
０重量部の割合で練り込んだ白色ポリエステフイルムを
使用することが好ましい。その厚さは２０μｍ〜２００
μｍの範囲であり、より好ましくは３０μｍ〜５０μｍ
である。Also, the backsheet 10 for solar cells
Heat and weather resistant plastic films 1 and 3
May be transparent, but titanium oxide or the like is added to 100 parts by weight of the polyester resin so as to diffusely reflect ultraviolet rays on the film surface, prevent transmission of the ultraviolet rays into the inside of the film, and increase the power generation capability of the element. 5 to 2 white pigments
It is preferable to use a white polyester film kneaded at a ratio of 0 parts by weight. Its thickness is from 20 μm to 200
μm, more preferably 30 μm to 50 μm
It is.
【００１７】また、この太陽電池用裏面保護シート１０
に使用する耐熱、耐候性プラスチックフイルム１及び３
には、必要に応じて難燃剤、酸化防止剤、紫外線吸収
剤、帯電防止剤などを配合しても良い。Also, the backsheet 10 for solar cells
Heat and weather resistant plastic films 1 and 3
May contain a flame retardant, an antioxidant, an ultraviolet absorber, an antistatic agent, and the like, if necessary.
【００１８】さらに、前述の耐熱、耐候性プラスチック
フイルム１及び３は、太陽電池モジュール作成工程の熱
プレスの際に、太陽電池用裏面保護シート１０が反り返
り、作業性に悪影響を及ぼさないように、同一タイプの
耐熱、耐候性プラスチックフイルムを使用することがよ
り好ましい。Further, the above-mentioned heat-resistant and weather-resistant plastic films 1 and 3 are provided so that the backsheet 10 for solar cells does not warp during the hot pressing in the solar cell module manufacturing process, so that the workability is not adversely affected. It is more preferable to use the same type of heat-resistant and weather-resistant plastic film.
【００１９】また、前記金属箔２はアルミニウム箔、亜
鉛メッキ鉄箔、錫メッキ鉄箔などを使用できるが、コス
ト面等からアルミニウム箔が好ましい。又、その厚さは
ピンホ−ルなどの発生を防ぐ上で２０μｍ以上が好まし
い。The metal foil 2 may be an aluminum foil, a zinc-plated iron foil, a tin-plated iron foil, or the like, but is preferably an aluminum foil in terms of cost. Further, the thickness is preferably 20 μm or more in order to prevent the occurrence of pinholes and the like.
【００２０】積層方法はドライラミネート法などの公知
の方法で積層することが出来る。接着剤層４及び５に使
用する接着剤は、耐熱、耐候性プラスチックフイルム１
及び３と金属箔２の接着強度が長期間の屋外使用で劣化
し、デラミネーションなどを生じないこと、さらに接着
剤が黄変しないことなどが必要であり、ウレタン系接着
剤などが使用できる。The lamination can be performed by a known method such as a dry lamination method. The adhesive used for the adhesive layers 4 and 5 is a heat-resistant and weather-resistant plastic film 1
In addition, it is necessary that the adhesive strength between the metal foil 2 and the metal foil 2 is degraded during long-term outdoor use without delamination or the like, and that the adhesive does not yellow, and a urethane-based adhesive can be used.
【００２１】次に、本発明の太陽電池用裏面保護シート
１０を使用して、太陽電池モジュールを作成した一例の
概略側断面図を図２に示す。厚み方向に順に、上部透明
材料４０、充填材３０、太陽電池素子２０、配線２１、
太陽電池用裏面保護シート１０、枠体５０で形成されて
いる。Next, FIG. 2 shows a schematic side sectional view of an example in which a solar cell module is manufactured by using the solar cell back surface protection sheet 10 of the present invention. In order in the thickness direction, the upper transparent material 40, the filler 30, the solar cell element 20, the wiring 21,
The back protection sheet 10 for a solar cell and the frame body 50 are formed.
【００２２】上部透明材料４０としては、光線透過率が
良いこと、長期（約２０年）にわたり優れた耐候性を持
ち、光線透過率の減少が少ないこと、埃などが付着しに
くいこと、傷が付きにくいこと及び水蒸気透過率が極め
て少ないこと等の諸機能を有する必要があり、ガラス、
アクリル樹脂、ポリカーボネート樹脂、シリコーン樹
脂、フッ素系樹脂などが使用される。The upper transparent material 40 has good light transmittance, has excellent weather resistance over a long period of time (about 20 years), has a small decrease in light transmittance, does not easily adhere to dust and the like, and has scratches. It is necessary to have various functions such as hardly sticking and extremely low water vapor transmission rate.
An acrylic resin, a polycarbonate resin, a silicone resin, a fluorine resin, or the like is used.
【００２３】充填材３０としては、太陽光線の透過率が
高いこと、長期の屋外放置などにより、光線透過率に低
下などの物性変化がないこと、絶縁耐性が高く、他の材
料を腐食しないこと及び急激な外気条件の変化などによ
る樹脂の亀裂、界面剥離などが発生しないこと等の諸機
能を有する必要があり、ポリビニルブチラール樹脂、シ
リコーン樹脂、塩化ビニル樹脂、ポリウレタン樹脂、エ
チレンー酢酸ビニル共重合体樹脂などが使用出来る。The filler 30 has a high transmittance of sunlight, has no change in physical properties such as a decrease in light transmittance due to being left outdoors for a long time, has a high insulation resistance, and does not corrode other materials. It is necessary to have various functions such as not causing cracking of the resin and interfacial peeling due to sudden changes in outside air conditions, etc., polyvinyl butyral resin, silicone resin, vinyl chloride resin, polyurethane resin, ethylene-vinyl acetate copolymer Resin can be used.
【００２４】太陽電池用裏面保護シート１０としては、
一般的には、絶縁性、モジュール製造工程での耐熱性
（１５０℃以上）があること、水蒸気透過率が極めて少
ないこと、長期の屋外放置などに耐える耐候性を有する
こと等の諸機能を有すると同時に低価格であることなど
が要求される。As the back surface protection sheet 10 for a solar cell,
Generally, it has various functions such as insulation, heat resistance in the module manufacturing process (150 ° C. or higher), extremely low water vapor permeability, and weather resistance to withstand long-term outdoor exposure. At the same time, it is required that the price be low.
【００２５】枠体としては、一般的にはアルミニウム型
材が使用される。As the frame, an aluminum mold is generally used.
【００２６】[0026]
【実施例】次に、本発明の太陽電池用裏面保護シート１
０及びこの保護シートを使用して作成した太陽電池モジ
ュール６０を、以下に具体的な実施例に従って説明する
が、本発明がこれらの実施例に限定されるものではな
い。Next, a backside protective sheet 1 for a solar cell according to the present invention.
The solar cell module 60 manufactured using the protective sheet 0 and this protective sheet will be described below with reference to specific examples, but the present invention is not limited to these examples.
【００２７】＜実施例１＞図１の構成の耐熱、耐候性プ
ラスチックフイルム層１として、固有粘度が０．６７
（ｄｌ／ｇ）で、かつ、環状三量体含有量が０．５重量
％以下のポリエステル脂から製造された厚さ５０μｍの
耐熱、耐候性白色ポリエステル樹脂フイルムの片面にド
ライラミネート機により、固形分３０重量％の武田薬品
工業（株）製ポリウレタン系接着剤（主剤タケラックＡ
５１５／硬化剤タケネートＡ５０＝１０／１溶液）を塗
布量４．０ｇ／ｍ2（乾燥状態）塗布し、その上に金属
箔層２として厚さ２５μｍのアルミニウム箔を貼り合わ
せ、しかる後そのアルミニウム箔面に、前述と同一の接
着剤を４．０ｇ／ｍ2（乾燥状態）塗布し、耐熱、耐候
性プラスチックフイルム３として、固有粘度が０．６７
で、かつ、環状三量体含有量が０．５重量％以下のポリ
エステル樹脂から作成された厚さ５０μｍの耐熱、耐候
性白色ポリエステル樹脂フイルムを貼り合わせ、本発明
の太陽電池用裏面保護シート１０を作成した。続いて、
前もって配線接続した太陽電池素子２０を充填材シート
３０（１００μｍのエチレンー酢酸ビニルシート）を敷
いた上部透明材料４０（ガラス板）の上に置き、その上
から同材質の、もう一枚の充填材シートをかぶせ、その
上に本発明の太陽電池用裏面保護シート１０をかぶせ、
減圧下で全体を１５０℃、２０分間熱プレスして太陽電
池用裏面保護シート１０を融着一体化させ、端部をアル
ミニウムなどの枠体で固定し、図２の構成の太陽電池モ
ジュール６０を作成した。Example 1 A heat-resistant and weather-resistant plastic film layer 1 having the structure shown in FIG. 1 has an intrinsic viscosity of 0.67.
(Dl / g) and a 50 μm-thick heat-resistant and weather-resistant white polyester resin film produced from a polyester resin having a cyclic trimer content of 0.5% by weight or less by a dry laminating machine. 30% by weight of a polyurethane adhesive manufactured by Takeda Pharmaceutical Co., Ltd.
515 / hardener Takenate A50 = 10/1 solution) was applied in an amount of 4.0 g / m 2 (in a dry state), and an aluminum foil having a thickness of 25 μm was adhered thereon as the metal foil layer 2. The same adhesive as described above was applied to the foil surface at 4.0 g / m 2 (dry state), and the heat-resistant and weather-resistant plastic film 3 had an intrinsic viscosity of 0.67.
And a 50 μm thick heat and weather resistant white polyester resin film made of a polyester resin having a cyclic trimer content of 0.5% by weight or less, and a solar cell backsheet 10 of the present invention. It was created. continue,
The solar cell element 20 previously wired and connected is placed on an upper transparent material 40 (glass plate) on which a filler sheet 30 (100 μm ethylene-vinyl acetate sheet) is laid, and another filler of the same material is placed thereon. Cover the sheet, cover the backsheet 10 for solar cells of the present invention on it,
The whole was hot-pressed at 150 ° C. for 20 minutes under reduced pressure to fuse and integrate the backsheet for solar cell 10, and the ends were fixed with a frame made of aluminum or the like. Created.
【００２８】＜実施例２＞実施例１において、図１の構
成の耐熱、耐候性プラスチックフイルム層１として、固
有粘度が０．６７で、かつ、環状三量体含有量が０．５
重量％以下の樹脂から作成された、白色顔料未添加の厚
さ５０μｍの透明ポリエステル樹脂フイルムを使用した
以外は、同様にして本発明の太陽電池用裏面保護シート
１０を作成及びそのシートを使用した太陽電池モジュー
ル６０を作成した。Example 2 In Example 1, the heat-resistant and weather-resistant plastic film layer 1 having the structure shown in FIG. 1 had an intrinsic viscosity of 0.67 and a cyclic trimer content of 0.5.
Except for using a transparent polyester resin film having a thickness of 50 μm and not containing a white pigment, which was prepared from a resin of not more than 10% by weight, a backside protective sheet 10 for a solar cell of the present invention was prepared and used in the same manner. A solar cell module 60 was created.
【００２９】＜比較例１＞実施例１において、図１の構
成の耐熱、耐候性プラスチックフイルム層１及び３とし
て、厚さ３８μｍの白色ポリフッ化ビニルフイルムを使
用した以外は、同様にして比較用の太陽電池用裏面保護
シート及びそのシートを使用した太陽電池モジュールを
作成した。<Comparative Example 1> Comparative Example 1 was carried out in the same manner as in Example 1, except that a 38 μm thick white polyvinyl fluoride film was used as the heat-resistant and weather-resistant plastic film layers 1 and 3 of FIG. And a solar cell module using the sheet.
【００３０】＜比較例２＞実施例１において、図１の構
成の耐熱、耐候性プラスチックフイルム層１及び３とし
て、固有粘度が０．６（ｄｌ／ｇ）未満で、かつ、環状
三量体含有量が０．５重量％を超える樹脂から作成され
た、厚さ５０μｍの白色ポリエステル樹脂フイルムを使
用した以外は，同様にして比較用の太陽電池用裏面保護
シート及びそのシートを使用した太陽電池モジュールを
作成した。Comparative Example 2 In Example 1, the heat-resistant and weather-resistant plastic film layers 1 and 3 having the structure shown in FIG. 1 had an intrinsic viscosity of less than 0.6 (dl / g) and a cyclic trimer. A backside protective sheet for a comparative solar cell and a solar cell using the same sheet, except that a white polyester resin film having a thickness of 50 μm and made of a resin having a content exceeding 0.5% by weight was used. Created a module.
【００３１】＜評価＞実施例１〜２及び比較例１〜２で
作成した太陽電池モジュールを用いて、ＪＩＳ−Ｃ８９
１３にもとづいた短絡電流、開放電圧、最大出力等の電
池特性及び高温高湿（８５℃、９５％ＲＨ）暴露試験を
実施し、評価した。結果を表１に示す。<Evaluation> Using the solar cell modules prepared in Examples 1 and 2 and Comparative Examples 1 and 2, JIS-C89 was used.
Battery characteristics such as short-circuit current, open-circuit voltage, maximum output, and the like, and a high-temperature and high-humidity (85 ° C., 95% RH) exposure test based on No. 13 were performed and evaluated. Table 1 shows the results.
【００３２】[0032]
【表１】 [Table 1]
【００３３】表１から実施例１〜２及び比較例１〜２の
太陽電池モジュールは高温高湿暴露試験１０００時間で
は電池特性、外観状態において有意差は認められない
が、暴露試験２０００時間になると比較例２の太陽電池
モジュールの裏面保護シートに使用されているポリエス
テル樹脂フイルムに亀裂が発生し、劣化しており、当然
電池特性も低下している。比較例１の太陽電池モジュー
ルは実施例１〜２と同様に長時間での暴露試験でも電池
特性及び外観とも異常はない。しかし、比較例１に使用
されている太陽電池用裏面保護シートはコストが高く、
太陽電池モジュールの低価格化の弊害になっている。実
施例１〜２に使用されている太陽電池用裏面保護シート
は、長時間での高温高湿暴露試験後も電池特性、外観と
もに異常が無く、かつ、価格も比較例１の太陽電池用裏
面保護シートに比べ約１／３位で低価格であるので、太
陽電池モジュールの低価格化の為に使用出来る。From Table 1, the solar cell modules of Examples 1 and 2 and Comparative Examples 1 and 2 show no significant difference in battery characteristics and appearance after 1000 hours of high temperature and high humidity exposure test, but after 2000 hours of exposure test. The polyester resin film used for the back surface protection sheet of the solar cell module of Comparative Example 2 was cracked and deteriorated, and the battery characteristics were naturally deteriorated. Similar to Examples 1 and 2, the solar cell module of Comparative Example 1 has no abnormality in the battery characteristics and appearance even in the long-term exposure test. However, the backsheet for solar cells used in Comparative Example 1 is expensive,
This is an adverse effect of lowering the price of the solar cell module. The backsheet for a solar cell used in Examples 1 and 2 has no abnormality in both battery characteristics and appearance even after a long-time high-temperature and high-humidity exposure test, and the backside for a solar cell of Comparative Example 1 has a low price. Since the price is about 1/3 lower than that of the protection sheet, it can be used to reduce the cost of the solar cell module.
【００３４】[0034]
【発明の効果】本発明の太陽電池用裏面保護シートは、
固有粘度が０．６（ｄｌ／ｇ）以上で、かつ、環状三量
体含有量が０．５重量％以下のポリエステル樹脂からな
る耐熱、耐候性プラスチックフイルムにより、両側から
金属箔をサンドイッチした構成の積層体になっているの
で、太陽電池モジュール製造時の熱などによる破れもな
く、長期間（約２０年）の屋外使用での諸機能の劣化も
なく、かつ、従来の裏面保護シートに比べ低価格である
ため太陽電池モジュールの品質安定化、低コスト化が可
能などの利点が得られ、太陽光発電に関連する産業分野
において多大な価値を有するものである。The solar cell back protective sheet of the present invention is
A structure in which a metal foil is sandwiched from both sides by a heat-resistant and weather-resistant plastic film made of a polyester resin having an intrinsic viscosity of 0.6 (dl / g) or more and a cyclic trimer content of 0.5% by weight or less. Because it is a laminated body, there is no breakage due to heat etc. at the time of manufacturing solar cell module, there is no deterioration of various functions in outdoor use for a long time (about 20 years), and compared with the conventional backside protection sheet Since it is inexpensive, any advantages that can stabilize the quality of the solar cell module and reduce the cost can be obtained, and have great value in the industrial field related to solar power generation.
【図１】本発明の太陽電池用裏面保護シートの側断面図
である。FIG. 1 is a side sectional view of a backsheet for a solar cell of the present invention.
【図２】本発明の太陽電池用裏面保護シートを使用した
太陽電池モジュールの模式側断面図である。FIG. 2 is a schematic side sectional view of a solar cell module using the solar cell back surface protection sheet of the present invention.
１…耐熱、耐候性プラスチックフイルム ２…金属箔
３…耐熱、耐候性プラスチックフイルム ４…接
着剤 ５…接着剤 １０…太陽電池用裏面保護シー
ト ２０…太陽電池素子 ２１…配線 ３０…充
填材 ４０…上部透明材料 ５０…枠体DESCRIPTION OF SYMBOLS 1 ... Heat-resistant and weather-resistant plastic film 2 ... Metal foil 3 ... Heat-resistant and weather-resistant plastic film 4 ... Adhesive 5 ... Adhesive 10 ... Backsheet for solar cell 20 ... Solar cell element 21 ... Wiring 30 ... Filler 40 ... Upper transparent material 50 ... Frame
Claims (2)
つ、環状三量体含有量が０．５重量％以下のポリエステ
ル樹脂からなる耐熱、耐候性プラスチックフイルムを積
層した積層体からなることを特徴とする太陽電池用裏面
保護シート。1. A laminate comprising a heat-resistant and weather-resistant plastic film made of a polyester resin having an intrinsic viscosity of 0.6 (dl / g) or more and a cyclic trimer content of 0.5% by weight or less. A backside protective sheet for a solar cell, comprising:
性プラスチックフイルムが、金属箔をその両面からサン
ドイッチした構成の積層体からなることを特徴とする請
求項１記載の太陽電池用裏面保護シート。2. The backsheet for solar cells according to claim 1, wherein the heat-resistant and weather-resistant plastic film made of the polyester resin is a laminate having a structure in which a metal foil is sandwiched from both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000322490A JP2002134770A (en) | 2000-10-23 | 2000-10-23 | Rear-surface protective sheet for solar cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000322490A JP2002134770A (en) | 2000-10-23 | 2000-10-23 | Rear-surface protective sheet for solar cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002134770A true JP2002134770A (en) | 2002-05-10 |
Family
ID=18800365
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000322490A Pending JP2002134770A (en) | 2000-10-23 | 2000-10-23 | Rear-surface protective sheet for solar cell |
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| Country | Link |
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| JP (1) | JP2002134770A (en) |
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| JP2005101032A (en) * | 2003-09-22 | 2005-04-14 | Sekisui Jushi Co Ltd | Solar cell module |
| WO2006108314A1 (en) * | 2005-04-11 | 2006-10-19 | Oc Oerlikon Balzers Ag | Solar cell module and method of encapsulating same |
| JP2007150084A (en) * | 2005-11-29 | 2007-06-14 | Dainippon Printing Co Ltd | Solar cell module, rear face protection sheet therefor and rear face lamination therefor |
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| WO2010113920A1 (en) | 2009-03-31 | 2010-10-07 | 帝人デュポンフィルム株式会社 | Laminated polyester film for protection of solar cell undersides |
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| JP2012169519A (en) * | 2011-02-16 | 2012-09-06 | Toyobo Co Ltd | Base material polyester film forming inorganic thin film for solar cell |
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| WO2006108314A1 (en) * | 2005-04-11 | 2006-10-19 | Oc Oerlikon Balzers Ag | Solar cell module and method of encapsulating same |
| JP2007150084A (en) * | 2005-11-29 | 2007-06-14 | Dainippon Printing Co Ltd | Solar cell module, rear face protection sheet therefor and rear face lamination therefor |
| JP2008053303A (en) * | 2006-08-22 | 2008-03-06 | Mitsubishi Heavy Ind Ltd | Solar cell panel |
| JP2008130647A (en) * | 2006-11-17 | 2008-06-05 | Toppan Printing Co Ltd | Backseat for solar-cell module, and solar-cell module using the backseat |
| JP2009200145A (en) * | 2008-02-20 | 2009-09-03 | Toppan Printing Co Ltd | Solar cell back sheet and solar cell module |
| US9028952B2 (en) | 2008-10-08 | 2015-05-12 | Skc Co., Ltd. | Multilayered weatherable film for solar cell |
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| EP2415599A4 (en) * | 2009-03-31 | 2015-02-11 | Teijin Dupont Films Japan Ltd | Laminated polyester film for protection of solar cell undersides |
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| JP2011032420A (en) * | 2009-08-05 | 2011-02-17 | Toyobo Co Ltd | Polyester film for solar cell |
| JP2011032421A (en) * | 2009-08-05 | 2011-02-17 | Toyobo Co Ltd | Polyester film for solar cell |
| WO2011063709A1 (en) * | 2009-11-27 | 2011-06-03 | Byd Company Limited | Backplane for solar battery and solar battery comprising the same |
| WO2012005034A1 (en) | 2010-07-06 | 2012-01-12 | 帝人デュポンフィルム株式会社 | Polyester film for protecting rear surface of solar cell |
| KR20130079485A (en) | 2010-08-18 | 2013-07-10 | 도요보 가부시키가이샤 | Hydrolysis-resistant polyester film |
| WO2012023571A1 (en) | 2010-08-18 | 2012-02-23 | 東洋紡績株式会社 | Hydrolysis-resistant polyester film |
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| JP2012169519A (en) * | 2011-02-16 | 2012-09-06 | Toyobo Co Ltd | Base material polyester film forming inorganic thin film for solar cell |
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| CN103765611A (en) * | 2011-08-30 | 2014-04-30 | 东丽株式会社 | Method for producing solar cell module, solar cell backside sealing sheet, and solar cell module |
| KR101285408B1 (en) | 2011-12-27 | 2013-07-11 | 김민혁 | Photovoltaic power generation module equipped the pocket typed-back sheet |
| KR101313339B1 (en) | 2011-12-27 | 2013-09-30 | (주)핫플레이어 | Manufacturing method for back sheet photovoltaic power generation of pocket type |
| WO2014104506A1 (en) * | 2012-12-27 | 2014-07-03 | Kim Min Hyuk | Pocket type photovoltaic power generation back sheet, method for manufacturing said back sheet, and photovoltaic power generation module including said back sheet |
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