JPH1126791A - Protective sheet for solar cell module - Google Patents
Protective sheet for solar cell moduleInfo
- Publication number
- JPH1126791A JPH1126791A JP9182659A JP18265997A JPH1126791A JP H1126791 A JPH1126791 A JP H1126791A JP 9182659 A JP9182659 A JP 9182659A JP 18265997 A JP18265997 A JP 18265997A JP H1126791 A JPH1126791 A JP H1126791A
- Authority
- JP
- Japan
- Prior art keywords
- solar cell
- peroxide
- protective sheet
- sheet
- cell module
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
- B32B17/10788—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing ethylene vinylacetate
Landscapes
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Photovoltaic Devices (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、太陽電池モジュー
ル用保護シートに関する。さらに詳しくは、太陽電池の
封止加工の際に高速架橋することができ、また黄変や膨
れ現象などのトラブルを生じない太陽電池モジュール用
保護シートに関する。[0001] The present invention relates to a protective sheet for a solar cell module. More specifically, the present invention relates to a protective sheet for a solar cell module, which can be cross-linked at a high speed during sealing processing of a solar cell and does not cause troubles such as yellowing and swelling.
【０００２】[0002]
【従来の技術】太陽電池モジュールの典型的な例として
保護シートで上下を固定された太陽電池素子が、さらに
上部透明保護材と下部基板保護材によって保護固定され
た構造のものが知られている。このような太陽電池モジ
ュールに用いられる保護シートとして、耐候性、接着
性、耐熱性などが要求されるほか、受光側では高透明性
が要求される。このような要求を満たすために有機過酸
化物を配合したエチレン共重合体がベース樹脂として用
いられ、これに適宜カップリング剤や架橋助剤などが配
合されている。2. Description of the Related Art As a typical example of a solar cell module, there is known a structure in which a solar cell element fixed up and down by a protective sheet is further protected and fixed by an upper transparent protective material and a lower substrate protective material. . A protective sheet used for such a solar cell module is required to have weather resistance, adhesiveness, heat resistance, and the like, and to have high transparency on the light receiving side. In order to satisfy such requirements, an ethylene copolymer containing an organic peroxide is used as a base resin, and a coupling agent, a crosslinking assistant, and the like are appropriately added thereto.
【０００３】エチレン共重合体に配合される有機過酸化
物については、すでに非常に多くのものが使用可能であ
ることが知られている。このうちジアルキルパーオキサ
イド型のものは、多くのものが半減期温度が高く、した
がって封止加工に時間がかかるという問題点があった。
また太陽電池素子を封止後、ＪＩＳ・Ｃ−８９１７に規
定された耐久性試験を行うことにより、保護シートが、
太陽電池モジュール端部及び太陽電池素子のハンダ加工
部との接触部等で黄変を起こすことがあった。上記ジア
ルキルパーオキサイドの代わりに、より半減期温度の低
いアルキルパーオキシエステルやパーオキシケタールの
ような過酸化物を使用すると、エチレン共重合体の架橋
がより短時間で起こり、封止加工の生産性を高めること
はできるが、多くの場合、過酸化物の分解物に起因する
ものと思われるが、保護シート部に膨れ現象が認められ
ることがあり、満足すべき製品を品質再現性よく得るこ
とができなかった。It is already known that a great many organic peroxides can be used in an ethylene copolymer. Among them, the dialkyl peroxide type has a problem that many of them have a high half-life temperature and therefore take a long time for sealing.
Also, after sealing the solar cell element, by performing a durability test specified in JIS C-8917, the protective sheet,
In some cases, yellowing occurred at the end of the solar cell module and at the contact portion with the soldered portion of the solar cell element. When a peroxide such as alkyl peroxyester or peroxyketal having a lower half-life temperature is used in place of the above dialkyl peroxide, crosslinking of the ethylene copolymer occurs in a shorter time, and the production of the sealing process is performed. Although it is possible to enhance the property, in many cases, it is thought that it is caused by the decomposition product of peroxide, but there is a case where a swelling phenomenon is observed in the protective sheet part, and a satisfactory product can be obtained with good quality reproducibility. I couldn't do that.
【０００４】[0004]
【発明が解決しようとする課題】そこで本発明者らは、
架橋を短時間に行うことができ、上記黄変や膨れ現象の
ようなトラブルもない保護シートを得るべく、鋭意検討
を行った。その結果、下記のような処方を採ることによ
りその目的が達成できることを知った。SUMMARY OF THE INVENTION Accordingly, the present inventors
In order to obtain a protective sheet which can be cross-linked in a short time and has no troubles such as the yellowing and the blistering phenomenon, intensive studies have been made. As a result, it has been found that the object can be achieved by using the following formulation.
【０００５】[0005]
【課題を解決するための手段】本発明は、有機過酸化物
を含有するエチレン共重合体からなる太陽電池モジュー
ル用保護シートにおいて、有機過酸化物として、ジアル
キルパーオキサイド（Ａ）と、アルキルパーオキシエス
テル及びパーオキシケタールからなる群より選ばれる少
なくとも１種の過酸化物（Ｂ）を、（Ａ）／（Ｂ）の重
量比が１０／９０〜９０／１０の割合で配合したものを
用いることを特徴とする太陽電池モジュール用保護シー
トに関する。According to the present invention, there is provided a protective sheet for a solar cell module comprising an ethylene copolymer containing an organic peroxide, wherein a dialkyl peroxide (A) and an alkyl peroxide are used as the organic peroxide. Use is made of a mixture of at least one peroxide (B) selected from the group consisting of oxyesters and peroxyketals in a weight ratio of (A) / (B) of 10/90 to 90/10. The present invention relates to a protection sheet for a solar cell module.
【０００６】[0006]
【発明の実施の形態】本発明で用いられるエチレン共重
合体は、光線透過率が７０％以上、とくに８０％以上
で、弾性モデュラスが１〜３０ＭＰａ、とくに３〜１２
ＭＰａのものが好適である。具体的には、酢酸ビニル、
プロピオン酸ビニルのようなビニルエステル、アクリル
酸メチル、アクリル酸エチル、アクリル酸イソブチル、
アクリル酸ｎブチル、アクリル酸２−エチルヘキシル、
メタクリル酸メチル、メタクリル酸イソブチル、アクリ
ル酸グリシジル、メタクリル酸グリシジル、マレイン酸
ジメチルのような不飽和カルボン酸エステル、アクリル
酸、メタクリル酸、マレイン酸、無水マレイン酸のよう
な不飽和カルボン酸またはこれらの金属塩、ビニルトリ
メトキシシラン、ビニルトリエトキシシランのような不
飽和珪素化合物、１−ブテン、１−ヘキセン、１−オク
テン、１−デセン、４−メチル−１−ペンテンのような
α−オレフィンなどの１種又は２種以上の共重合成分と
エチレンの共重合体を挙げることができる。このような
共重合体はまた、不飽和カルボン酸や不飽和珪素化合物
などでグラフト変性されたものであってもよい。BEST MODE FOR CARRYING OUT THE INVENTION The ethylene copolymer used in the present invention has a light transmittance of 70% or more, particularly 80% or more, and an elastic modulus of 1 to 30 MPa, especially 3 to 12 MPa.
Mpa is preferable. Specifically, vinyl acetate,
Vinyl esters such as vinyl propionate, methyl acrylate, ethyl acrylate, isobutyl acrylate,
N-butyl acrylate, 2-ethylhexyl acrylate,
Unsaturated carboxylic acid esters such as methyl methacrylate, isobutyl methacrylate, glycidyl acrylate, glycidyl methacrylate, dimethyl maleate, unsaturated carboxylic acids such as acrylic acid, methacrylic acid, maleic acid, maleic anhydride or these Metal salts, unsaturated silicon compounds such as vinyltrimethoxysilane and vinyltriethoxysilane, α-olefins such as 1-butene, 1-hexene, 1-octene, 1-decene, and 4-methyl-1-pentene And copolymers of ethylene with one or more copolymer components. Such a copolymer may also be one modified by grafting with an unsaturated carboxylic acid or an unsaturated silicon compound.
【０００７】これらエチレン共重合体としては、エチレ
ン・酢酸ビニル共重合体やエチレン・不飽和カルボン酸
エスエル共重合体の使用が好ましく、とくにエチレン・
酢酸ビニル共重合体の使用がもっとも好ましい。透明
性、接着性、柔軟性、熱収縮特性、強度等を勘案する
と、エチレン・酢酸ビニル共重合体やエチレン・不飽和
カルボン酸エステル共重合体としてはエチレン含量が５
５〜８５重量％、とくに６０〜８０重量％程度のものを
使用するのが好ましい。もっとも受光側でない裏面保護
シートには、透明性は要求されないのでエチレン含量の
さらに高い共重合体も好ましく使用できる。エチレン共
重合体としてはまた、加工性、強度等を勘案すると、１
９０℃、２１６０ｇ荷重におけるメルトフローレートが
１〜１００ｇ／１０分、とくに２〜６０ｇ／１０分程度
のものを使用するのが好ましい。As these ethylene copolymers, the use of ethylene / vinyl acetate copolymer or ethylene / unsaturated carboxylic acid S copolymer is preferred.
Most preferred is the use of a vinyl acetate copolymer. Considering transparency, adhesion, flexibility, heat shrinkage, strength, etc., ethylene-vinyl acetate copolymer or ethylene-unsaturated carboxylic acid ester copolymer has an ethylene content of 5%.
It is preferable to use those having a content of 5 to 85% by weight, especially about 60 to 80% by weight. However, a backside protective sheet that is not the light receiving side is not required to have transparency, so that a copolymer having a higher ethylene content can be preferably used. In consideration of processability, strength, etc., the ethylene copolymer is 1
It is preferable to use one having a melt flow rate at 90 ° C. and a load of 2160 g of 1 to 100 g / 10 minutes, particularly about 2 to 60 g / 10 minutes.
【０００８】本発明の保護シートに用いられるエチレン
共重合体には、２種のタイプの有機過酸化物が配合され
る。その一つはジアルキルパーオキサイド（Ａ）であ
り、とくに１時間半減期温度が１３０〜１６０℃、とり
わけ１３５〜１５０℃のものが好ましい。なお本発明の
過酸化物における「アルキル」は、脂環族炭化水素や芳
香族炭化水素で置換されたアルキルも含むものである。
より具体的には、ジクミルパーオキサイド（１３５
℃）、１，３−ビス（２−ｔ−ブチルパーオキシイソプ
ロピル）ベンゼン（１３７℃）２，５−ジメチル−２，
５−ビス（ｔ−ブチルパーオキシ）ヘキサン（１３８
℃）、ｔ−ブチルクミルパーオキサイド（１４２℃）、
ジ−ｔ−ブチルパーオキサイド（１４９℃）、あるいは
これらの２種以上の任意割合の混合物などを例示するこ
とができる。The ethylene copolymer used in the protective sheet of the present invention contains two types of organic peroxides. One of them is a dialkyl peroxide (A), which preferably has a one-hour half-life temperature of 130 to 160 ° C, especially 135 to 150 ° C. The “alkyl” in the peroxide of the present invention includes an alkyl substituted with an alicyclic hydrocarbon or an aromatic hydrocarbon.
More specifically, dicumyl peroxide (135)
° C), 1,3-bis (2-t-butylperoxyisopropyl) benzene (137 ° C) 2,5-dimethyl-2,
5-bis (t-butylperoxy) hexane (138
° C), t-butylcumyl peroxide (142 ° C),
Examples thereof include di-t-butyl peroxide (149 ° C.) and a mixture of two or more of these at an arbitrary ratio.
【０００９】他のタイプの過酸化物（Ｂ）は、アルキル
パーオキシエステル（Ｂ1 ）またはパーオキシケタール
（Ｂ2 ）から選ばれるものであり、とくに１時間半減期
温度が１００〜１３５℃、とりわけ１０５〜１３０℃の
ものが好ましい。より具体的には、ｔ−ブチルパーオキ
シイソブチレート（１０２℃）、ｔ−ブチルパーオキシ
マレイン酸（１１０℃）、ｔ−ブチルパーオキシイソプ
ロピルカーボネート（１１９℃）、ｔ−ブチルパーオキ
シ２−エチルヘキシルカーボネート（１２１℃）、２，
５−ジメチル−２，５−ビス（ベンゾイルパーオキシ）
ヘキサン（１１８℃）、ｔ−ブチルパーオキシアセテー
ト（１２３℃）、ｔ−ブチルパーオキシイソノナノエー
ト（１２３℃）、ｔ−ブチルパーオキシベンゾエート
（１２５℃）などのアルキルパーオキシエステル、１，
１−ビス（ｔ−ブチルパーオキシ）３，３，５−トリメ
チルシクロヘキサン（１１２℃）、１，１−ビス（ｔ−
ブチルパーオキシ）シクロヘキサン（１１２℃）、１，
１−ビス（ｔ−アミルパーオキシ）シクロヘキサン（１
１２℃）、２，２−ビス（ｔ−ブチルパーオキシ）ブタ
ン（１１９℃）、ｎ−ブチル−４，４−ビス（ｔ−ブチ
ルパーオキシ）バレレート（１２９℃）、エチル−３，
３−ジ（ｔ−ブチルパーオキシ）ブチレート（１３５
℃）などのパーオキシケタール、あるいはこれら２種以
上の任意割合の混合物などを例示することができる（括
弧内はいずれも１時間半減期温度）。これら過酸化物は
無機物粉末や溶媒により希釈したものを使用することが
できる。The other type of peroxide (B) is selected from alkyl peroxyesters (B 1 ) and peroxy ketals (B 2 ), and has a one-hour half-life temperature of 100 to 135 ° C. Particularly, those having a temperature of 105 to 130 ° C are preferable. More specifically, t-butyl peroxyisobutyrate (102 ° C.), t-butyl peroxymaleic acid (110 ° C.), t-butyl peroxyisopropyl carbonate (119 ° C.), t-butyl peroxy 2- Ethylhexyl carbonate (121 ° C), 2,
5-dimethyl-2,5-bis (benzoylperoxy)
Alkyl peroxyesters such as hexane (118 ° C.), t-butyl peroxyacetate (123 ° C.), t-butyl peroxy isononanoate (123 ° C.), t-butyl peroxybenzoate (125 ° C.),
1-bis (t-butylperoxy) 3,3,5-trimethylcyclohexane (112 ° C.), 1,1-bis (t-butylperoxy)
Butylperoxy) cyclohexane (112 ° C), 1,
1-bis (t-amylperoxy) cyclohexane (1
12 ° C), 2,2-bis (t-butylperoxy) butane (119 ° C), n-butyl-4,4-bis (t-butylperoxy) valerate (129 ° C), ethyl-3,
3-di (t-butylperoxy) butyrate (135
C.), or a mixture of two or more of these at an arbitrary ratio. These peroxides can be used as diluted with an inorganic powder or a solvent.
【００１０】過酸化物（Ａ）と（Ｂ）の使用比率は、重
量比で（Ａ）／（Ｂ）が１０／９０〜９０／１０、好ま
しくは３０／７０〜７０／３０の範囲である。また過酸
化物（Ａ）及び（Ｂ）の合計使用量は、エチレン共重合
体１００重量部に対し０．２〜４重量部、好ましくは
０．５〜３重量部である。合計使用量が上記範囲より少
ないと、エチレン共重合体を充分架橋することが難し
く、耐熱性や接着性が不足する虞がある。また過度に使
用すると、保護シートの着色や膨れの原因となるので好
ましくない。また（Ａ）と（Ｂ）の使用割合は、架橋速
度を高め、変色や膨れを防止するために上記のような範
囲とされる。（Ｂ）の使用割合が少なすぎると、架橋速
度が不充分であったり、着色が完全に防止することが難
しくなるので好ましくなく、また（Ｂ）の使用割合が多
くなりすぎると膨れ現象が生じる虞があるので好ましく
ない。The weight ratio of peroxides (A) and (B) is such that (A) / (B) is in the range of 10 / 90-90 / 10, preferably 30 / 70-70 / 30. . The total amount of peroxides (A) and (B) used is 0.2 to 4 parts by weight, preferably 0.5 to 3 parts by weight, based on 100 parts by weight of the ethylene copolymer. If the total amount is less than the above range, it is difficult to sufficiently crosslink the ethylene copolymer, and heat resistance and adhesiveness may be insufficient. In addition, excessive use is not preferred because it causes coloring and swelling of the protective sheet. The proportions of (A) and (B) are in the above ranges in order to increase the crosslinking rate and prevent discoloration and blistering. If the proportion of (B) is too small, the crosslinking rate is insufficient or it is difficult to completely prevent coloring, which is not preferable. If the proportion of (B) is too large, a blistering phenomenon occurs. It is not preferable because there is a fear.
【００１１】本発明の保護シートは、上記エチレン共重
合体と過酸化物（Ａ）（Ｂ）とからなる組成物とから形
成されるが、必要に応じ種々の添加剤を配合することが
できる。例えば接着性を高めるためにカップリング剤を
配合することができる。このようなカップリング剤とし
て、有機珪素化合物や有機チタン化合物を例示すること
ができる。有機珪素化合物の例として、ビニル基、アミ
ノアルキル基、メタクリロキシアルキル基、アクリロキ
シアルキル基、メルカプトアルキル基、エポキシ基のよ
うな反応性有機基と、ハロゲン、アルコキシ基、アセト
キシ基のような加水分解性基とを有する化合物であっ
て、より具体的にはビニルトリエトキシシラン、ビニル
トリス（β−メトキシエトキシ）シラン、γ−メタクリ
ロキシプロピルメトキシシラン、ビニルトリアセトキシ
シラン、γ−グリシドキシプロピルトリメトキシシラ
ン、γ−グリシドキシトリエトキシシラン、β−（３，
４−エポキシシクロヘキシル）エチルトリメトキシシラ
ンのような不飽和基又はエポキシ基を有する化合物が好
ましい。このようなカップリング剤は、エチレン共重合
体１００重量部に対し、０．１〜１０重量部、とくに
０．５〜５重量部程度配合すると効果的である。The protective sheet of the present invention is formed from a composition comprising the above-mentioned ethylene copolymer and peroxides (A) and (B), and may contain various additives as required. . For example, a coupling agent can be blended to enhance the adhesiveness. Examples of such a coupling agent include an organic silicon compound and an organic titanium compound. Examples of the organic silicon compound include a reactive organic group such as a vinyl group, an aminoalkyl group, a methacryloxyalkyl group, an acryloxyalkyl group, a mercaptoalkyl group, and an epoxy group, and a reactive organic group such as a halogen, an alkoxy group, and an acetoxy group. A compound having a decomposable group, and more specifically, vinyltriethoxysilane, vinyltris (β-methoxyethoxy) silane, γ-methacryloxypropylmethoxysilane, vinyltriacetoxysilane, γ-glycidoxypropyltrisilane. Methoxysilane, γ-glycidoxytriethoxysilane, β- (3,
Compounds having an unsaturated group or an epoxy group, such as 4-epoxycyclohexyl) ethyltrimethoxysilane, are preferred. It is effective to add such a coupling agent in an amount of about 0.1 to 10 parts by weight, particularly about 0.5 to 5 parts by weight, based on 100 parts by weight of the ethylene copolymer.
【００１２】また架橋速度や架橋効率を高めるために、
架橋助剤を配合することができる。このような架橋助剤
の例として、ポリアリル化合物やポリ（メタ）アクリロ
キシ化合物のような多不飽和化合物を例示することがで
きる。より具体的にはトリアリルイソシアヌレート、ト
リアリルシアレート、ジアリルフタレート、ジアリルフ
マレート、ジアリルマレエートのようなポリアリル化合
物、エチレングリコールジアクリレート、エチレングリ
コールジメタクリレートのようなポリ（メタ）アクリロ
キシ化合物をあげることができる。In order to increase the crosslinking speed and the crosslinking efficiency,
A crosslinking aid can be blended. Examples of such a crosslinking aid include polyunsaturated compounds such as polyallyl compounds and poly (meth) acryloxy compounds. More specifically, poly (meth) acryloxy compounds such as triallyl isocyanurate, triallyl sialate, diallyl phthalate, diallyl fumarate, diallyl maleate, and ethylene glycol diacrylate and ethylene glycol dimethacrylate are used. I can give it.
【００１３】さらに各種酸化防止剤、光安定剤、紫外線
吸収剤、着色剤などを配合することができる。例えば酸
化防止剤として、フェノール系安定剤、硫黄系安定剤、
燐酸系安定剤など、また光安定剤としてはヒンダードア
ミン系光安定剤を、また紫外線吸収剤としてはベンゾフ
ェノン系、ベンゾトリアゾール系、サリチル酸系、シア
ノアクリレート系などの紫外線吸収剤、酸化チタンのよ
うな着色剤を適宜配合することができる。このような安
定剤類を配合する場合には、太陽電池モジュールの使用
環境を考慮すると、低揮発性の比較的分子量の大きいも
のを使用することが望ましい。Further, various antioxidants, light stabilizers, ultraviolet absorbers, coloring agents and the like can be blended. For example, as an antioxidant, a phenol-based stabilizer, a sulfur-based stabilizer,
Phosphoric acid stabilizers, etc .; hindered amine light stabilizers as light stabilizers; UV absorbers such as benzophenone, benzotriazole, salicylic acid, cyanoacrylate etc. as UV absorbers, coloring such as titanium oxide An agent can be appropriately compounded. When such stabilizers are blended, it is preferable to use a low-volatile compound having a relatively large molecular weight in consideration of the use environment of the solar cell module.
【００１４】保護シートの成形は、エチレン共重合体、
有機過酸化物、適宜配合される添加剤からなる組成物
を、通常のエチレン共重合体の成形と同様にして、有機
過酸化物が実質的に分解しない温度、例えば８０〜１３
０℃のような温度で行うことができる。シート厚みは
０．１〜１．０ｍｍ程度が適当である。The protective sheet is formed by ethylene copolymer,
A composition comprising an organic peroxide and additives appropriately blended is treated at a temperature at which the organic peroxide does not substantially decompose, for example, 80 to 13 in the same manner as in usual molding of an ethylene copolymer.
It can be performed at a temperature such as 0 ° C. The sheet thickness is suitably about 0.1 to 1.0 mm.
【００１５】かくして得られる保護シートを用いて太陽
電池素子を封止するには、すでに知られている方法を準
用すればよく、例えば次のようにして行うことができ
る。太陽電池素子がシリコンやセレンの半導体ウエハー
からなる場合には、これら太陽電池素子を少なくとも２
枚の本発明の保護シートで挟み、さらに必要な場合には
その両側に予めプライマー処理した保護材、すなわち上
部透明保護材と下部基板保護材とを重ね合わせ、真空に
することにより脱気操作したのち、またはこれと同時に
加熱し、次いで加圧することにより接着させて貼り合わ
せる。この際、太陽電池素子を本発明の保護シートで予
めラミネート化し、次いで上部透明保護材および下部基
板保護材と貼り合わせてもよい。また、適宜プライマー
処理された下部基板保護材、本発明の保護シート、太陽
電池素子、本発明の保護シートおよび上部透明保護材
を、順次重ね合わせまたは配列して貼り合わせてもよ
い。In order to seal a solar cell element using the protective sheet thus obtained, a known method may be applied mutatis mutandis, for example, as follows. When the solar cell elements are made of silicon or selenium semiconductor wafers, these solar cell elements must be at least 2
It was sandwiched between two protective sheets of the present invention, and if necessary, a protective material pre-primed on both sides thereof, that is, an upper transparent protective material and a lower substrate protective material were overlapped, and deaeration was performed by applying vacuum. Thereafter, or simultaneously with this, the mixture is heated and then pressurized to bond and bond. At this time, the solar cell element may be preliminarily laminated with the protective sheet of the present invention, and then bonded to the upper transparent protective material and the lower substrate protective material. In addition, the lower substrate protective material, the protective sheet of the present invention, the solar cell element, the protective sheet of the present invention, and the upper transparent protective material, which have been appropriately treated with a primer, may be sequentially laminated or arranged and laminated.
【００１６】加熱は、最終的に保護シート中に添加され
ている有機過酸化物がほぼ完全に分解するまで行うのが
好ましい。この加熱処理により、保護シートは架橋され
保護シートと各保護材とは強固に接着され、太陽電池素
子が２枚の保護シートでラミネート化され、かつそれが
その上部透明保護材と下部基板保護材とに強固に貼り合
わされた太陽電池モジュールが形成される。The heating is preferably performed until the organic peroxide finally added to the protective sheet is almost completely decomposed. By this heat treatment, the protective sheet is cross-linked and the protective sheet and each protective material are firmly adhered, the solar cell element is laminated with two protective sheets, and the upper transparent protective material and the lower substrate protective material are laminated. Thus, a solar cell module firmly bonded is formed.
【００１７】ここで行われる加熱処理は、モジュール製
造の生産性を高めるためには、ラミネーター内で１工程
で行うのが望ましい。例えば有機過酸化物として、１時
間半減期温度が１４０℃のジアルキルパーオキサイド
（Ａ）と１１０℃のパーオキシケタール（Ｂ）を用いる
場合、ラミネーターを真空にして１５０℃で０．１〜５
分間で仮接着を行い、ついで常圧にしてさらに５〜３０
分間程度加熱して完全に貼り合わせを行う。The heat treatment performed here is desirably performed in one step in a laminator in order to increase the productivity of module production. For example, in the case of using a dialkyl peroxide (A) having a one-hour half-life temperature of 140 ° C. and a peroxyketal (B) of 110 ° C. as an organic peroxide, the laminator is evacuated to 150 ° C. at 0.1 to 5 ° C.
Perform temporary bonding in minutes, then apply normal pressure for another 5-30
Heat for about a minute for complete lamination.
【００１８】加熱処理はまた２段階に分けて行ってもよ
い。例えば上記２種の有機過酸化物を使用する場合、１
５０℃の真空ラミネーター内で０．１〜５分間仮接着を
行ったのち、１５０℃のオーブン内で常圧下で５〜１０
０分間加熱する工程を別々に行う。この場合において
も、１５０℃、常圧下での加熱工程は、有機過酸化物と
して上記ジアルキルパーオキサイド（Ａ）のみを使用し
た場合より短時間で行うことができる。The heat treatment may be performed in two stages. For example, when the above two kinds of organic peroxides are used, 1
After performing a temporary bonding in a vacuum laminator at 50 ° C. for 0.1 to 5 minutes, and then performing a normal bonding in a 150 ° C. oven under normal pressure for 5 to 10 minutes.
The step of heating for 0 minutes is performed separately. Also in this case, the heating step at 150 ° C. and normal pressure can be performed in a shorter time than when only the dialkyl peroxide (A) is used as the organic peroxide.
【００１９】また太陽電池素子がガラス、プラスチッ
ク、セラミック、ステンレスなどの保護材上に形成され
ている場合には、必要に応じプライマー処理された保護
シートを中間層とし、いずれか一方の保護材の内周面
（保護シート接触面）上に太陽電池素子を形成させた上
部透明保護材および下部基板保護材を前記中間層保護シ
ートの上下に重ね、より具体的には下部基板保護材上面
に形成させた太陽電池素子の上に保護シートと上部透明
保護材を順次重ねるか、あるいは上部透明保護材下面に
形成させた太陽電池素子の下に保護シートと下部基板保
護材を順次重ねるかし、これを前記と同様に加熱処理を
行うことにより、太陽電池素子を形成させた一方の保護
材、保護シートおよび他方の保護材が強固に貼り合わさ
れた太陽電池モジュールを形成することができる。When the solar cell element is formed on a protective material such as glass, plastic, ceramic, stainless steel, etc., a protective sheet which has been subjected to a primer treatment, if necessary, is used as an intermediate layer. An upper transparent protective material and a lower substrate protective material having a solar cell element formed on an inner peripheral surface (protective sheet contact surface) are stacked on and under the intermediate layer protective sheet, more specifically, formed on the upper surface of the lower substrate protective material. Whether the protective sheet and the upper transparent protective material are sequentially stacked on the solar cell element that has been made, or the protective sheet and the lower substrate protective material are sequentially stacked below the solar cell element formed on the lower surface of the upper transparent protective material. Is subjected to a heat treatment in the same manner as described above, whereby the solar cell module having one of the protective materials, the protective sheet, and the other protective material on which the solar cell element is formed is firmly bonded. It can be formed.
【００２０】このようにして製造される太陽電池モジュ
ールの保護シート層においては、エチレン共重合体のゲ
ル化率（シート１ｇを１００ｍｌのキシレンに浸漬し、
１１０℃、２４時間加熱したのち、金網で濾過し、不溶
解分を捕集、乾燥、秤量することにより測定）が６５％
以上、好ましくは７０％以上になっていることが望まし
い。In the protective sheet layer of the solar cell module manufactured as described above, the gelation rate of the ethylene copolymer (1 g of the sheet was immersed in 100 ml of xylene,
After heating at 110 ° C. for 24 hours, the solution was filtered through a wire mesh, and the insoluble matter was collected, dried, and weighed (measured by 65%).
It is desirable that it be at least 70%.
【００２１】[0021]
【発明の効果】本発明によれば、黄変や膨れ現象がみら
れない保護シートが提供できる。このような保護シート
を用いて太陽電池モジュールを製造する場合、低温で短
時間で架橋を行うことができるので、太陽電池モジュー
ルの生産性を高めることができる。また得られる太陽電
池モジュールは、外観、品質に優れ、かつ経時的な光線
透過率の低下が少ないため、長期にわたって高い発電効
率を維持することができる。According to the present invention, it is possible to provide a protective sheet free from yellowing and blistering. When a solar cell module is manufactured using such a protective sheet, crosslinking can be performed at a low temperature in a short time, so that the productivity of the solar cell module can be increased. Further, the obtained solar cell module is excellent in appearance and quality and has a small decrease in light transmittance over time, so that high power generation efficiency can be maintained for a long period of time.
【００２２】[0022]
［実施例１］エチレン−酢酸ビニル共重合体（酢酸ビニ
ル含量３３重量％、ＭＦＲ３０ｇ／１０ｍｉｎ）１００
重量部に対してジアルキルパーオキサイド（Ａ）として
２，５−ジメチル−２，５−ジ（ｔ−ブチルパーオキ
シ）ヘキサン０．７５部、パーオキシケタール（Ｂ2 ）
として１，１−ジ（ｔ−ブチルパーオキシ）−３，３，
５−トリメチルシクロヘキサン０．７５部、その他の添
加剤として、γ−メタクリロキシプロピルメトキシシラ
ン１．０重量部、２−ヒドロキシ−４−ｎ−オクトキシ
ベンゾフェノン０．３重量部、ビス（２，２，６，６−
テトラメチル−４−ピペリジル）セバケート０．１重量
部、オクタデシル−３−（３，５−ジ−ｔ−ブチル−４
−ヒドロキシフェニル）プロピオネート０．１重量部、
及びトリス（ノニルフェニル）ホスファイト０．２重量
部を配合した混合物をＴ−ダイ押出成形機を用いて、成
形温度９０℃にて０．６ｍｍ厚みのシートに押出した。Example 1 Ethylene-vinyl acetate copolymer (vinyl acetate content 33% by weight, MFR 30 g / 10 min) 100
0.75 part of 2,5-dimethyl-2,5-di (t-butylperoxy) hexane as dialkyl peroxide (A) and peroxyketal (B 2 ) based on parts by weight
1,1-di (t-butylperoxy) -3,3
0.75 part of 5-trimethylcyclohexane, 1.0 part by weight of γ-methacryloxypropylmethoxysilane, 0.3 part by weight of 2-hydroxy-4-n-octoxybenzophenone, bis (2,2 , 6,6-
0.1 parts by weight of tetramethyl-4-piperidyl) sebacate, octadecyl-3- (3,5-di-t-butyl-4)
-Hydroxyphenyl) propionate 0.1 part by weight,
And 0.2 parts by weight of tris (nonylphenyl) phosphite were extruded into a 0.6 mm thick sheet at a molding temperature of 90 ° C. using a T-die extruder.
【００２３】このシートを用いて、下記（１）〜（５）
の方法により架橋特性（ゲル分率）、耐湿性、耐熱性、
耐候性、膨れ性を評価した。結果を表１に示す。Using this sheet, the following (1) to (5)
Cross-linking properties (gel fraction), moisture resistance, heat resistance,
The weather resistance and the swelling property were evaluated. Table 1 shows the results.
【００２４】（１）架橋特性（ゲル分率） Ｔ−ダイ押出成形機を用いて押出したシートを１５０℃
のプレス成形機を用いて１０分間加圧下で加熱すること
によって架橋シートを作成する。この架橋シート１ｇを
１００ｍｌのキシレンに浸漬し、１１０℃、２４時間加
熱した後金網で濾過して不溶解分を捕集し、乾燥後秤量
して得られたゲル分率によって架橋特性を評価した。(1) Crosslinking Characteristics (Gel Fraction) A sheet extruded using a T-die extruder was heated at 150 ° C.
The cross-linked sheet is prepared by heating under pressure for 10 minutes using a press molding machine. 1 g of this crosslinked sheet was immersed in 100 ml of xylene, heated at 110 ° C. for 24 hours, filtered through a wire net to collect insolubles, dried, weighed, and evaluated for crosslinkability by the gel fraction obtained. .
【００２５】（２）耐湿性 太陽電池用の上部透明保護材である透明ガラス板と下部
基板保護材である白色のポリフッ化ビニルとの間に上記
押出シートを挟んで、真空ラミネーターを用いて加熱温
度１５０℃で溶融貼合せ（仮接着）を行った。この仮接
着積層物を更に常圧下、１５０℃で２０分間加熱するこ
とによって有機過酸化物を分解させ、Ｔ−ダイシートを
架橋させると共に透明ガラス板及びポリフッ化ビニルに
強固に接着させた積層品を作成した。この積層品につい
て、ＪＩＳ・Ｃ−８９１７に規定された耐湿性試験に基
づき、８５℃、９０％ＲＨの恒温恒湿機中で１０００時
間加湿、加熱後の黄変度（ΔＹＩ）をＪＩＳ Ｋ−７５
０１の方法でスガ試験機株式会社製ＳＭカラーコンピュ
ーターを用いて評価した。(2) Moisture resistance The extruded sheet is sandwiched between a transparent glass plate as an upper transparent protective material for a solar cell and white polyvinyl fluoride as a lower substrate protective material, and heated using a vacuum laminator. Melt bonding (temporary bonding) was performed at a temperature of 150 ° C. The temporary adhesive laminate was further heated at 150 ° C. for 20 minutes under normal pressure to decompose the organic peroxide, cross-link the T-die sheet, and firmly adhere to the transparent glass plate and polyvinyl fluoride. Created. Based on the moisture resistance test specified in JIS C-8917, the laminate was humidified in a thermostat at 85 ° C. and 90% RH for 1000 hours, and the yellowing degree (ΔYI) after heating was measured according to JIS K-90. 75
The evaluation was performed by the method of No. 01 using an SM color computer manufactured by Suga Test Instruments Co., Ltd.
【００２６】（３）耐熱性 上記（２）に記載の貼合せ条件で作成した積層品につい
て、ＪＩＳ・Ｃ−８９１７に規定された耐熱性試験に基
づき、８５℃のオーブン中で１０００時間加熱後の黄変
度（ΔＹＩ）を（２）に記載の方法で評価した。(3) Heat resistance The laminate prepared under the laminating conditions described in (2) above was heated in an oven at 85 ° C. for 1,000 hours based on a heat resistance test specified in JIS C-8917. Was evaluated by the method described in (2).
【００２７】（４）耐候性 上記（２）に記載の貼合せ条件で作成した積層品につい
て、ＪＩＳ・Ｃ−８９１７に規定された耐候性試験に基
づき、ブラックパネル８３℃の条件のサンシャインウェ
ザーメーターで透明ガラス板より紫外線を連続５００時
間照射し、黄変度（ΔＹＩ）を（２）に記載の方法で評
価した。(4) Weather Resistance The sunshine weather meter of the black panel at 83 ° C. based on the weather resistance test specified in JIS C-8917 for the laminated product prepared under the bonding conditions described in (2) above. , A UV ray was continuously irradiated from a transparent glass plate for 500 hours, and the degree of yellowing (ΔYI) was evaluated by the method described in (2).
【００２８】（５）膨れ性 透明のポリエチレンテレフタラートシートとの間に上記
押出シートを挟んで、真空ラミネーターを用いて加熱温
度１５０℃にて溶融貼合せ（仮接着）を行った。この仮
接着積層物について、１５０℃オーブン中で１時間加熱
することによって有機過酸化物を分解させ、積層物に発
生する膨れを目視にて観察し評価した。(5) Swellability The extruded sheet was sandwiched between a transparent polyethylene terephthalate sheet and melt lamination (temporary adhesion) at a heating temperature of 150 ° C. using a vacuum laminator. The temporary adhesive laminate was heated in a 150 ° C. oven for 1 hour to decompose the organic peroxide, and the blister generated in the laminate was visually observed and evaluated.
【００２９】［実施例２］実施例１において、１，１−
ジ（ｔ−ブチルパーオキシ）−３，３，５−トリメチル
シクロヘキサンに代えて、アルキルパーオキシエステル
（Ｂ1 ）であるｔ−ブチルパーオキシ−２−エチルヘキ
シルカーボネート０．７５部を用いた以外は実施例１と
同様にしてエチレン−酢酸ビニル共重合体組成物シート
を作成し、架橋特性（ゲル分率）、耐湿性、耐熱性、耐
候性、膨れ性を評価した。結果を表１に示す。[Example 2] In Example 1, 1,1-
Except that instead of di (t-butylperoxy) -3,3,5-trimethylcyclohexane, 0.75 part of t-butylperoxy-2-ethylhexyl carbonate, which is an alkyl peroxyester (B 1 ), was used. An ethylene-vinyl acetate copolymer composition sheet was prepared in the same manner as in Example 1, and the crosslinking properties (gel fraction), moisture resistance, heat resistance, weather resistance, and swelling property were evaluated. Table 1 shows the results.
【００３０】［実施例３］実施例１において、２，５−
ジメチル−２，５−ジ（ｔ−ブチルパーオキシ）ヘキサ
ンの添加量を０．５部とし、パーオキシケタール（Ｂ
2 ）として１，１−ジ（ｔ−ブチルパーオキシ）−３，
３，５−トリメチルシクロヘキサン０．５部及びｎ−ブ
チル−４，４−ビス（ｔ−ブチルパーオキシ）バレレー
ト０．５部の混合物を用いた以外は実施例１と同様にし
てエチレン−酢酸ビニル共重合体組成物シートを作成
し、架橋特性（ゲル分率）、耐湿性、耐熱性、耐候性、
膨れ性を評価した。結果を表１に示す。Example 3 In Example 1, 2,5-
The addition amount of dimethyl-2,5-di (t-butylperoxy) hexane was 0.5 part, and the peroxyketal (B
2 ) 1,1-di (t-butylperoxy) -3,
Ethylene-vinyl acetate was prepared in the same manner as in Example 1 except that a mixture of 0.5 part of 3,5-trimethylcyclohexane and 0.5 part of n-butyl-4,4-bis (t-butylperoxy) valerate was used. Preparation of copolymer composition sheet, cross-linking properties (gel fraction), moisture resistance, heat resistance, weather resistance,
The swelling property was evaluated. Table 1 shows the results.
【００３１】［実施例４］実施例３において、パーオキ
シケタール（Ｂ2 ）である１，１−ジ（ｔ−ブチルパー
オキシ）−３，３，５−トリメチルシクロヘキサンに代
えて、アルキルパーオキシエステル（Ｂ1 ）であるｔ−
ブチルパーオキシ−２−エチルヘキシルカーボネート
０．５部を用いた以外は実施例３と同様にしてエチレン
−酢酸ビニル共重合体組成物シートを作成し、架橋特性
（ゲル分率）、耐湿性、耐熱性、耐候性、膨れ性を評価
した。結果を表１に示す。Example 4 In Example 3, alkyl peroxy ketal (B 2 ) was replaced with 1,1-di (t-butylperoxy) -3,3,5-trimethylcyclohexane. T- which is an ester (B 1 )
An ethylene-vinyl acetate copolymer composition sheet was prepared in the same manner as in Example 3 except that 0.5 part of butyl peroxy-2-ethylhexyl carbonate was used, and crosslinking properties (gel fraction), moisture resistance, and heat resistance were measured. The properties, weather resistance and swelling were evaluated. Table 1 shows the results.
【００３２】［比較例１］実施例１において、有機過酸
化物としてジアルキルパーオキサイド（Ａ）である２，
５−ジメチル−２，５−ジ（ｔ−ブチルパーオキシ）ヘ
キサンを１．５部配合したのみで、アルキルパーオキシ
エステル（Ｂ1 ）もパーオキシケタール（Ｂ2 ）も配合
しなかった以外は実施例１と同様にしてエチレン−酢酸
ビニル共重合体組成物シートを作成し、架橋特性（ゲル
分率）、耐湿性、耐熱性、耐候性、膨れ性を評価した。
結果を表２に示す。[Comparative Example 1] In Example 1, dialkyl peroxide (A) was used as the organic peroxide.
Except that only 1.5 parts of 5-dimethyl-2,5-di (t-butylperoxy) hexane was blended, and neither alkylperoxyester (B 1 ) nor peroxyketal (B 2 ) was blended. An ethylene-vinyl acetate copolymer composition sheet was prepared in the same manner as in Example 1, and the crosslinking properties (gel fraction), moisture resistance, heat resistance, weather resistance, and swelling property were evaluated.
Table 2 shows the results.
【００３３】［比較例２］実施例１において、有機過酸
化物としてパーオキシケタール（Ｂ2 ）である１，１−
ジ（ｔ−ブチルパーオキシ）−３，３，５−トリメチル
シクロヘキサンを１．５部配合したのみでジアルキルパ
ーオキサイド（Ａ）を配合しなかった以外は実施例１と
同様にしてエチレン−酢酸ビニル共重合体組成物シート
を作成し、架橋特性（ゲル分率）、耐湿性、耐熱性、耐
候性、膨れ性を評価した。結果を表２に示す。COMPARATIVE EXAMPLE 2 In Example 1, 1,1-peroxy ketal (B 2 ) was used as the organic peroxide.
Ethylene-vinyl acetate was prepared in the same manner as in Example 1 except that only 1.5 parts of di (t-butylperoxy) -3,3,5-trimethylcyclohexane was blended and no dialkyl peroxide (A) was blended. A copolymer composition sheet was prepared and evaluated for crosslinking properties (gel fraction), moisture resistance, heat resistance, weather resistance, and swelling. Table 2 shows the results.
【００３４】［比較例３］実施例１において、有機過酸
化物としてアルキルパーオキシエステル（Ｂ1 ）である
ｔ−ブチルパーオキシ−２−エチルヘキシルカーボネー
トを１．５部配合したのみでジアルキルパーオキサイド
（Ａ）を配合しなかった以外は実施例１と同様にしてエ
チレン−酢酸ビニル共重合体組成物シートを作成し、架
橋特性（ゲル分率）、耐湿性、耐熱性、耐候性、膨れ性
を評価した。結果を表２に示す。[Comparative Example 3] In Example 1, dialkyl peroxide was prepared by blending only 1.5 parts of t-butylperoxy-2-ethylhexyl carbonate which is an alkylperoxyester (B 1 ) as an organic peroxide. An ethylene-vinyl acetate copolymer composition sheet was prepared in the same manner as in Example 1 except that (A) was not blended, and crosslinking properties (gel fraction), moisture resistance, heat resistance, weather resistance, and swelling property were obtained. Was evaluated. Table 2 shows the results.
【００３５】［比較例４］実施例１において、有機過酸
化物としてパーオキシケタール（Ｂ2 ）であるｎ−ブチ
ル−４，４−ビス（ｔ−ブチルパーオキシ）バレレート
を１．５部配合したのみでジアルキルパーオキサイド
（Ａ）を配合しなかった以外は実施例１と同様にしてエ
チレン−酢酸ビニル共重合体組成物シートを作成し、架
橋特性（ゲル分率）、耐湿性、耐熱性、耐候性、膨れ性
を評価した。結果を表３に示す。Comparative Example 4 In Example 1, 1.5 parts of n-butyl-4,4-bis (t-butylperoxy) valerate, which is a peroxyketal (B 2 ), was added as an organic peroxide. An ethylene-vinyl acetate copolymer composition sheet was prepared in the same manner as in Example 1 except that the dialkyl peroxide (A) was not blended, and crosslinking properties (gel fraction), moisture resistance, and heat resistance were measured. , Weather resistance and swelling were evaluated. Table 3 shows the results.
【００３６】［比較例５］実施例１において、有機過酸
化物としてパーオキシケタール（Ｂ2 ）である１，１−
ジ（ｔ−ブチルパーオキシ）−３，３，５−トリメチル
シクロヘキサン０．７５部と、ｎ−ブチル−４，４−ビ
ス（ｔ−ブチルパーオキシ）バレレート０．７５部との
混合物を配合したのみで、ジアルキルパーオキサイド
（Ａ）を配合しなかった以外は実施例１と同様にしてエ
チレン−酢酸ビニル共重合体組成物シートを作成し、架
橋特性（ゲル分率）、耐湿性、耐熱性、耐候性、膨れ性
を評価した。結果を表３に示す。Comparative Example 5 In Example 1, 1,1-peroxy ketal (B 2 ) was used as the organic peroxide.
A mixture of 0.75 part of di (t-butylperoxy) -3,3,5-trimethylcyclohexane and 0.75 part of n-butyl-4,4-bis (t-butylperoxy) valerate was blended. Example 2 An ethylene-vinyl acetate copolymer composition sheet was prepared in the same manner as in Example 1 except that the dialkyl peroxide (A) was not blended, and crosslinking properties (gel fraction), moisture resistance, and heat resistance were measured. , Weather resistance and swelling were evaluated. Table 3 shows the results.
【００３７】［比較例６］実施例１において、有機過酸
化物としてパーオキシケタール（Ｂ2 ）であるｎ−ブチ
ル−４，４−ビス（ｔ−ブチルパーオキシ）バレレート
０．７５部と、アルキルパーオキシエステル（Ｂ1 ）で
あるｔ−ブチルパーオキシ−２−エチルヘキシルカーボ
ネート０．７５部を配合したのみで、ジアルキルパーオ
キサイド（Ａ）を配合しなかった以外は実施例１と同様
にしてエチレン−酢酸ビニル共重合体組成物シートを作
成し、架橋特性（ゲル分率）、耐湿性、耐熱性、耐候
性、膨れ性を評価した。結果を表３に示す。Comparative Example 6 In Example 1, 0.75 parts of n-butyl-4,4-bis (t-butylperoxy) valerate, which is a peroxyketal (B 2 ) as an organic peroxide, In the same manner as in Example 1 except that only 0.75 parts of t-butyl peroxy-2-ethylhexyl carbonate, which is an alkyl peroxyester (B 1 ), was added, and no dialkyl peroxide (A) was added. An ethylene-vinyl acetate copolymer composition sheet was prepared and evaluated for crosslinking properties (gel fraction), moisture resistance, heat resistance, weather resistance, and swelling. Table 3 shows the results.
【００３８】[0038]
【表１】 Ａ−：２，５−ジメチル−２，５−ジ（ｔ−ブチルパ
ーオキシ）ヘキサン Ｂ−：１，１−ジ（ｔ−ブチルパーオキシ）−３，
３，５−トリメチルシクロヘキサン Ｂ−：ｎ−ブチル−４，４−ビス（ｔ−ブチルパーオ
キシ）バレレート Ｂ−：ｔ−ブチルパーオキシ−２−エチルヘキシルカ
ーボネート[Table 1] A-: 2,5-dimethyl-2,5-di (t-butylperoxy) hexane B-: 1,1-di (t-butylperoxy) -3,
3,5-trimethylcyclohexane B-: n-butyl-4,4-bis (t-butylperoxy) valerate B-: t-butylperoxy-2-ethylhexyl carbonate
【００３９】[0039]
【表２】 [Table 2]
【００４０】[0040]
【表３】 [Table 3]
【００４１】表１に示したように、ジアルキルパーオキ
サイド類（Ａ）と、アルキルパーオキシエステル類（Ｂ
1 ）またはパーオキシケタール類（Ｂ2 ）に属するパー
オキサイド類（Ｂ）のうち、いずれか１方のみを配合し
たシートでは架橋特性（ゲル分率）、耐湿性、耐熱性、
耐候性、膨れ性のうち何れかは不良であった。それに対
し上記（Ａ）（Ｂ）の両者を併用配合したシートは全て
の性質において良好であった。As shown in Table 1, dialkyl peroxides (A) and alkyl peroxyesters (B
1 ) or a peroxide (B) belonging to the peroxyketals (B 2 ), a sheet containing only one of them has a crosslinking property (gel fraction), moisture resistance, heat resistance,
Either weather resistance or blistering property was poor. On the other hand, the sheet in which both of the above (A) and (B) were blended was good in all properties.
Claims (3)
体からなる太陽電池モジュール用保護シートにおいて、
有機過酸化物として、ジアルキルパーオキサイド（Ａ）
と、アルキルパーオキシエステル及びパーオキシケター
ルからなる群より選ばれる少なくとも１種の過酸化物
（Ｂ）を、（Ａ）／（Ｂ）の重量比が１０／９０〜９０
／１０の割合で配合したものを用いることを特徴とする
太陽電池モジュール用保護シート。1. A protective sheet for a solar cell module comprising an ethylene copolymer containing an organic peroxide,
Dialkyl peroxide (A) as an organic peroxide
And at least one peroxide (B) selected from the group consisting of alkyl peroxyesters and peroxyketals in a weight ratio of (A) / (B) of 10/90 to 90.
A protective sheet for a solar cell module, characterized by using a composition blended at a rate of / 10.
間半減期温度が１３０〜１６０℃であり、過酸化物
（Ｂ）の１時間半減期温度が１００〜１３５℃である請
求項１記載の太陽電池モジュール用保護シート。2. The solar cell according to claim 1, wherein the one-hour half-life temperature of the dialkyl peroxide (A) is 130 to 160 ° C., and the one-hour half-life temperature of the peroxide (B) is 100 to 135 ° C. Protective sheet for battery module.
配合してなる請求項１又は２記載の太陽電池モジュール
用保護シート。3. The protective sheet for a solar cell module according to claim 1, further comprising a coupling agent and / or a crosslinking assistant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18265997A JP4034382B2 (en) | 1997-07-08 | 1997-07-08 | Protection sheet for solar cell module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18265997A JP4034382B2 (en) | 1997-07-08 | 1997-07-08 | Protection sheet for solar cell module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1126791A true JPH1126791A (en) | 1999-01-29 |
| JP4034382B2 JP4034382B2 (en) | 2008-01-16 |
Family
ID=16122196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18265997A Expired - Lifetime JP4034382B2 (en) | 1997-07-08 | 1997-07-08 | Protection sheet for solar cell module |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4034382B2 (en) |
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| KR101202573B1 (en) * | 2010-10-19 | 2012-11-20 | 삼성토탈 주식회사 | Composition of Ethylene Vinyl Acetate Copolymer for Solar Cell Encapsulant |
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| US9382405B2 (en) | 2011-01-31 | 2016-07-05 | United Initiators Gmbh & Co. Kg | Peroxide blends for cross-linking ethylene vinyl acetate in an accelerated manner |
| JP2012238685A (en) * | 2011-05-11 | 2012-12-06 | Nof Corp | Sealing material for solar cell and method for producing the same |
| US9543461B2 (en) | 2012-02-14 | 2017-01-10 | Mitsui Chemicals, Inc. | Encapsulating material for solar cell and solar cell module |
| JP2013170193A (en) * | 2012-02-20 | 2013-09-02 | Nof Corp | Sealing material for solar cell module |
| JP2013171915A (en) * | 2012-02-20 | 2013-09-02 | Nof Corp | Sealing material for solar cell module |
| JP2014067862A (en) * | 2012-09-26 | 2014-04-17 | Nof Corp | Sealing material for solar cell module |
| WO2017182870A1 (en) * | 2016-04-22 | 2017-10-26 | Nexans | Crosslinkable polymer composition comprising organic peroxide |
| KR20200042527A (en) * | 2017-08-30 | 2020-04-23 | 다우 글로벌 테크놀로지스 엘엘씨 | Polyolefin formulation containing peroxide |
| JP2020532616A (en) * | 2017-08-30 | 2020-11-12 | ダウ グローバル テクノロジーズ エルエルシー | Polyolefin formulation containing peroxide |
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