JP2014108965A - 耐候性樹脂層、積層体及び太陽電池モジュール - Google Patents
耐候性樹脂層、積層体及び太陽電池モジュール Download PDFInfo
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Abstract
【解決手段】(メタ)アクリル酸ヒドロキシエステルと、(メタ)アクリル酸ヒドロキシエステルの共重合体とを含むアクリルポリオール樹脂を含有することを特徴とする耐候性樹脂層。
【選択図】なし
Description
1.(メタ)アクリル酸ヒドロキシエステルと、(メタ)アクリル酸ヒドロキシエステルの共重合体とを含むアクリルポリオール樹脂を含有することを特徴とする耐候性樹脂層。
2.前記アクリルポリオール樹脂の含有量は、前記耐候性樹脂層100質量%に対して5〜40質量%である、上記項1に記載の耐候性樹脂層。
3.酸化チタンを10〜60質量%含有する、上記項1又は2に記載の耐候性樹脂層。
4.エポキシ樹脂を0.5〜6.0質量%含有する、上記項1〜3のいずれかに記載の耐候性樹脂層。
5.ポリカーボネート樹脂を0.5〜6.0質量%含有する、上記項1〜4のいずれかに記載の耐候性樹脂層。
6.無黄変ポリイソシアネートを含む、上記項1〜5のいずれかに記載の耐候性樹脂層。
7.上記項1〜6のいずれかに記載の耐候性樹脂層が、樹脂フィルムの少なくとも一方の面に積層されていることを特徴とする積層体。
8.前記樹脂フィルムは、ポリエチレンテレフタレートを含む、上記項7に記載の積層体。
9.太陽電池裏面保護シートである、上記項7又は8に記載の積層体。
10.上記項7〜9のいずれかに記載の積層体を用いて得られる太陽電池モジュール。
本発明の耐候性樹脂層は、アクリルポリオール樹脂を含有する。耐候性樹脂層中のアクリルポリオールの含有量は、耐候性樹脂層100質量%に対して5〜40質量%が好ましく、10〜20質量%がより好ましい。アクリルポリオール樹脂の含有量が少な過ぎると、耐候性樹脂層の柔軟性が低下し、樹脂フィルム等と積層された際に、経時的に剥離を生じるおそれがある。また、アクリルポリオール樹脂の含有量が多過ぎると、樹脂フィルムとしてPETフィルムが積層された際に、耐候性樹脂層と、樹脂フィルムとの間でブロッキングを生じるおそれがある。
(メタ)アクリル酸ヒドロキシエステルと、(メタ)アクリル酸ヒドロキシエステルの共重合体とを含むアクリルポリオール樹脂を、ウレタン樹脂組成物100質量%に対して15質量%となるように採取した。このアクリルポリオール樹脂に、ウレタン樹脂組成物100質量%に対してエポキシ樹脂が0.5質量%、ポリカーボネート樹脂が0.5質量%、及び酸化チタンが50質量%となるようにこれらの添加剤を混合して、主剤を調製した。
耐候性ポリエチレンテレフタレートフィルム(東レ株式会社製、商品名:X10S 厚み50μm)を用意し、比較例1の耐候性樹脂層とした。
耐候性樹脂層に代えて、耐候性ポリエチレンテレフタレートフィルム(東レ株式会社製、商品名:X10S 厚み50μm)を用い、樹脂フィルム上にウレタン系接着剤を用いて接着した以外は実施例1と同様にして積層体を得た。
耐候性樹脂層に代えて、PVFフィルム(デュポン社製 厚み38μm)を用い、樹脂フィルム上にウレタン系接着剤を用いて接着した以外は実施例1と同様にして積層体を得た。
<耐候性(変色)評価>
耐候性の評価としてUV照射試験を行った。具体的には、実施例1及び比較例1〜3で得られた積層体、又は耐候性樹脂層の色差を、エックスライトMA68IINS試験機(X−Rite Inc.製)を用いて測定し、初期の色差とした。次いで、実施例1及び比較例1〜3で得られた積層体、又は耐候性樹脂層に、メタルハライドランプを用いて、1000w/m2、300〜400nm、30hrの条件でUVを照射した。これらのUVが照射された積層体、又は耐候性樹脂層の色差を、上記試験機を用いて測定し、UV照射後の色差とした。初期の色差のΔb*値と、UV照射後の色差のΔb*値との差を算出した。Δb*値の差が≦3の場合、目視では変色の判断が困難なレベルであるので評価結果を「○」とした。また、Δb*値の差が>3の場合、目視にて変色が視認できるため評価結果を「×」とした。結果を表1に示した。
<耐候性(破断伸度変化)評価>
実施例1及び比較例1〜3の積層体、又は耐候性樹脂層について、耐候性(UV照射後破断伸度変化)評価を行なった。具体的には、実施例1及び比較例1〜3で得られた積層体、又は耐候性樹脂層について、破断伸度を測定して、初期破断伸度とした。また、上述の試験例1の条件でUVを照射した積層体、又は耐候性樹脂層についても破断伸度を測定し、UV照射後破断伸度とした。
<耐水性評価>
実施例1及び比較例1〜3の積層体、又は耐候性樹脂層について、耐候性(PCT試験後破断伸度変化)評価を行なった。具体的には、実施例1及び比較例1〜3で得られた積層体、又は耐候性樹脂層について、プレッシャークッカー(PCT)試験機を用いて、温度120℃、湿度100%、圧力0.2MPa、試験時間50hrの条件下でPCT試験を行った。
10.積層体
11.耐候性樹脂層
12.樹脂フィルム
20.封止材
30.発電セル
40.ガラス板
50.フレーム
Claims (10)
- (メタ)アクリル酸ヒドロキシエステルと、(メタ)アクリル酸ヒドロキシエステルの共重合体とを含むアクリルポリオール樹脂を含有することを特徴とする耐候性樹脂層。
- 前記アクリルポリオール樹脂の含有量は、前記耐候性樹脂層100質量%に対して5〜40質量%である、請求項1に記載の耐候性樹脂層。
- 酸化チタンを10〜60質量%含有する、請求項1又は2に記載の耐候性樹脂層。
- エポキシ樹脂を0.5〜6.0質量%含有する、請求項1〜3のいずれかに記載の耐候性樹脂層。
- ポリカーボネート樹脂を0.5〜6.0質量%含有する、請求項1〜4のいずれかに記載の耐候性樹脂層。
- 無黄変ポリイソシアネートを含む、請求項1〜5のいずれかに記載の耐候性樹脂層。
- 請求項1〜6のいずれかに記載の耐候性樹脂層が、樹脂フィルムの少なくとも一方の面に積層されていることを特徴とする積層体。
- 前記樹脂フィルムは、ポリエチレンテレフタレートを含む、請求項7に記載の積層体。
- 太陽電池裏面保護シートである、請求項7又は8に記載の積層体。
- 請求項7〜9のいずれかに記載の積層体を用いて得られる太陽電池モジュール。
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PCT/JP2013/080426 WO2014084031A1 (ja) | 2012-11-30 | 2013-11-11 | 耐候性樹脂層、積層体及び太陽電池モジュール |
CN201380050064.6A CN104703797B (zh) | 2012-11-30 | 2013-11-11 | 耐候性树脂层、层叠体及太阳能电池组件 |
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WO2010067780A1 (ja) * | 2008-12-12 | 2010-06-17 | 東レ株式会社 | 太陽電池裏面封止材用フィルム、太陽電池裏面封止材および太陽電池モジュール |
JP2012082365A (ja) * | 2010-10-14 | 2012-04-26 | Dic Corp | 硬化性コーティング組成物、積層ポリエステル樹脂フィルム及び太陽電池バックシート |
WO2012090856A1 (ja) * | 2010-12-28 | 2012-07-05 | ヘンケルジャパン株式会社 | 太陽電池バックシート用接着剤 |
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JP2008004691A (ja) * | 2006-06-21 | 2008-01-10 | Toppan Printing Co Ltd | 太陽電池裏面封止用シート |
JP2010238815A (ja) * | 2009-03-30 | 2010-10-21 | Lintec Corp | 太陽電池モジュール用保護シート及び太陽電池モジュール |
JP5601791B2 (ja) * | 2009-04-28 | 2014-10-08 | 日東電工株式会社 | 自動車ホイール用保護フィルム |
JP5522362B2 (ja) * | 2009-09-28 | 2014-06-18 | 大日本印刷株式会社 | 太陽電池モジュール用裏面保護シート、及び太陽電池モジュール |
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WO2010067780A1 (ja) * | 2008-12-12 | 2010-06-17 | 東レ株式会社 | 太陽電池裏面封止材用フィルム、太陽電池裏面封止材および太陽電池モジュール |
JP2012082365A (ja) * | 2010-10-14 | 2012-04-26 | Dic Corp | 硬化性コーティング組成物、積層ポリエステル樹脂フィルム及び太陽電池バックシート |
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