JPH08283696A - Sheet for sealing solar cell and its production - Google Patents
Sheet for sealing solar cell and its productionInfo
- Publication number
- JPH08283696A JPH08283696A JP7113840A JP11384095A JPH08283696A JP H08283696 A JPH08283696 A JP H08283696A JP 7113840 A JP7113840 A JP 7113840A JP 11384095 A JP11384095 A JP 11384095A JP H08283696 A JPH08283696 A JP H08283696A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- film
- solar cell
- radiation
- vinyl acetate
- 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]
【産業上の利用分野】本発明は太陽電池封止用シート及
びその製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar cell encapsulating sheet and a method for producing the same.
【0002】[0002]
【従来の技術】通常、太陽電池パネルは、カバーガラス
/EVAシート/太陽電池セル/EVAシート/裏面材
料の貼合せ構造になっている。ここに用いるEVAシー
トは、近年、PVBシートに代えて用いられている。即
ち、EVAシートは、PVBシートに比較して材料費が
安く(約2/3)、材料のプロセッシングが簡単で、し
かもEVAシートによる貼合せは、架橋反応を経て形成
されるため耐熱性や信頼性に優れているためである。2. Description of the Related Art Usually, a solar cell panel has a laminated structure of cover glass / EVA sheet / solar cell / EVA sheet / back surface material. The EVA sheet used here is used in place of the PVB sheet in recent years. That is, the EVA sheet has a lower material cost (about 2/3) than the PVB sheet, the processing of the material is simple, and the bonding by the EVA sheet is formed by a crosslinking reaction so that it has heat resistance and reliability. This is because it has excellent properties.
【0003】このEVAシートによる貼合せ工程は、カ
バーガラスを下にして熱板上にEVAシートを乗せ、二
重真空方式により脱気するとともに、前記熱板の熱によ
りEVAシートを溶かして太陽電池セルの回りに充填さ
せた後、パーオキサイド架橋して固定する。この場合、
EVAシートが未架橋の温度領域にて積層体を加圧して
圧着し、次いで、EVAシートが全て架橋する温度と時
間を保持することが必要である。In the step of laminating with an EVA sheet, the EVA sheet is placed on the hot plate with the cover glass facing down and deaerated by the double vacuum method, and the EVA sheet is melted by the heat of the hot plate to produce a solar cell. After filling around the cell, it is fixed by crosslinking with peroxide. in this case,
It is necessary to pressurize and press-bond the laminate in a temperature range where the EVA sheet is not crosslinked, and then to maintain the temperature and time for the EVA sheet to be completely crosslinked.
【0004】[0004]
【発明が解決しようとする課題】しかしながら、EVA
シートの融点は、50〜100°C、好ましくは60〜
80°Cであって、架橋剤の分解温度(架橋開始温度)
は110〜130°Cであるため、架橋と溶融収縮との
競争反応となっていた。このため、加熱架橋の際にEV
Aシートが縮み、EVAシートが存在しない部分(穴開
き)が起こるとの問題があった。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
The melting point of the sheet is 50 to 100 ° C, preferably 60 to
80 ° C, decomposition temperature of crosslinking agent (crosslinking initiation temperature)
Is 110 to 130 ° C., there was a competitive reaction between crosslinking and melt shrinkage. Therefore, when heat-crosslinking, EV
There is a problem that the A sheet shrinks and a portion (perforation) where the EVA sheet does not exist occurs.
【0005】このEVAシートの穴開き現象を防止する
手段として、EVA本来の分子量を大きくする方法やビ
ニルアセテートの共重合量を下げて融点を上げ、低温域
での流動性を制御する方法などが考えられたが、これら
の方法では、成膜時に成形温度が上がり架橋剤が分解し
てしまうか、経済的に成立しない生産速度まで極端に落
として成膜しなければならなかった。As means for preventing the perforation phenomenon of the EVA sheet, there are a method of increasing the original molecular weight of EVA and a method of lowering the copolymerization amount of vinyl acetate to raise the melting point to control the fluidity in a low temperature range. It was thought that, in these methods, the film forming temperature was increased during film formation, the crosslinking agent was decomposed, or the film formation rate had to be extremely reduced to a production rate that was not economically feasible.
【0006】本発明は、低温域における流動性を制御し
てEVAシートの穴開き現象を防止できる太陽電池封止
用シートを提供することを目的としたものである。ま
た、本発明の他の目的はそのような太陽電池封止用シー
トを成膜速度を落とすことなく生産できる新規な製造方
法を提供することにある。An object of the present invention is to provide a solar cell encapsulating sheet which can control the fluidity in a low temperature range and prevent the EVA sheet from puncturing. Another object of the present invention is to provide a novel manufacturing method capable of producing such a solar cell encapsulating sheet without reducing the film formation rate.
【0007】[0007]
【課題を解決するための手段】上記の目的を達成するた
め、本発明の太陽電池封止用シートは、架橋剤及びシラ
ンカップリング剤を配合したエチレンビニルアセテート
共重合体からなるシートであって、一定のゲル分率まで
放射線架橋(例えば、γ線架橋)させてなるものであ
る。To achieve the above object, the solar cell encapsulating sheet of the present invention is a sheet made of an ethylene vinyl acetate copolymer containing a crosslinking agent and a silane coupling agent. , Which is radiation-crosslinked (eg, γ-ray crosslinked) up to a certain gel fraction.
【0008】また、本発明の太陽電池封止用シートの製
造方法は、架橋剤及びシランカップリング剤を配合した
エチレンビニルアセテート共重合体からなり、成膜後に
所定量の放射線を照射するようにしたものである。Further, the method for producing a solar cell encapsulating sheet of the present invention comprises an ethylene vinyl acetate copolymer containing a cross-linking agent and a silane coupling agent, and a predetermined amount of radiation is irradiated after the film formation. It was done.
【0009】[0009]
【作用】架橋剤及びシランカップリング剤を配合したエ
チレンビニルアセテート共重合体からなるシートを、一
定のゲル分率まで放射線架橋させると、低温域における
流動性が制御でき、加熱収縮が小さく、穴開き現象が防
止できるものである。[Function] When a sheet made of an ethylene vinyl acetate copolymer mixed with a cross-linking agent and a silane coupling agent is radiation-crosslinked to a certain gel fraction, the fluidity in the low temperature range can be controlled, the heat shrinkage is small, and the hole The opening phenomenon can be prevented.
【0010】また、架橋剤及びシランカップリング剤を
配合したエチレンビニルアセテート共重合体で成膜し、
その成膜後に所定量の放射線を照射して製造するから、
成膜までの生産速度は落とすことがない。Further, a film is formed from an ethylene vinyl acetate copolymer containing a crosslinking agent and a silane coupling agent,
Since the film is produced by irradiating a predetermined amount of radiation after the film formation,
The production speed until film formation does not decrease.
【0011】従って、本発明により得たシートを用いて
太陽電池セルを挟み、それをカバーガラスと裏面材料と
の間に装填し、該カバーガラスを下にして熱板上に乗
せ、二重真空方式により脱気するとともに、前記熱板の
熱により前記EVAシートを溶かして太陽電池セルの回
りに充填させた後、パーオキサイド架橋して固定して太
陽電池を製造するときに、穴開き現象の問題は一切生じ
ないものである。Therefore, a solar cell is sandwiched by using the sheet obtained by the present invention, the solar cell is placed between the cover glass and the back surface material, and the cover glass is placed on the hot plate, and the double vacuum is applied. When degassing by the method, the EVA sheet is melted by the heat of the hot plate and filled around the solar cells, and then peroxide-crosslinked to fix the solar cells to manufacture a solar cell. No problems arise.
【0012】[0012]
【実施例】次に、本発明の実施例を説明する。本発明に
用いるエチレンビニルアセテート共重合体(EVA)
は、ビニルアセテート(VA)の含有率が5〜50%、
好ましくは15〜40%のものが使用される。VAの含
有率が5%未満であると樹脂の耐候性及び透明性に問題
が生ずる一方、50%を超えると、樹脂の機械的性質が
著しく低下するばかりでなく、成膜が困難となる。Next, embodiments of the present invention will be described. Ethylene vinyl acetate copolymer (EVA) used in the present invention
Has a vinyl acetate (VA) content of 5 to 50%,
Preferably 15 to 40% is used. If the content of VA is less than 5%, the weather resistance and transparency of the resin will be problematic, whereas if it exceeds 50%, not only the mechanical properties of the resin will be significantly deteriorated, but also film formation will be difficult.
【0013】エチレンビニルアセテート共重合体に添加
される架橋剤としては、成膜形成温度、架橋温度などを
考慮して選ばれる。たとえば、2,5−ジメチルヘキサ
ン−2,5−ジハイドロパーオキサイド;2,5−ジメ
チル−2,5−ジ(t−ブチルパーオキシ)ヘキサン−
3;ジ−t−ブチルパーオキサイド;t−ブチルクミル
パーオキサイド;2,5−ジメチル−2,5−ジ(t−
ブチルパーオキシ)ヘキサン;ジクミルパーオキサイ
ド;a,a′−ビス(t−ブチルパーオキシイソプロピ
ル)ベンゼン;n−ブチル−4,4−ビス(t−ブチル
パーオキシ)バレレート;2,2−ビス(t−ブチルパ
ーオキシ)ビタン;1,1−ビス(t−ブチルパーオキ
シ)シクロヘキサン;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;t−
ブチルパーオキシベンズエード;ベンゾイルパーオキサ
イド;第3ブチルパーオキシアセテート;2,5−ジメ
チル−2,5−ビス(第3ブチルパーオキシ)ヘキシン
−3;1,1−ビス(第3ブチルパーオキシ)−3,
3,5−トリメチルシクロヘキサン;1,1−ビス(第
3ブチルパーオキシ)−シクロヘキサン;メチルエチル
ケトンパーオキサイド;2,5−ジメチルヘキシル−
2,5−ビスパーオキシベンゾエート;第3ブチルハイ
ドロパーオキサイド;p−メンクンハイドロパーオキサ
イド;p−クロルベンゾイルパーオキサイド;第3ブチ
ルパーオキシイソブチレート;ヒドロキシヘブチルパー
オキサイド;クロルヘキサノンパーオキサイドなどが挙
げられる。The cross-linking agent added to the ethylene vinyl acetate copolymer is selected in consideration of the film formation temperature, the cross-linking temperature and the like. For example, 2,5-dimethylhexane-2,5-dihydroperoxide; 2,5-dimethyl-2,5-di (t-butylperoxy) hexane-
3; di-t-butyl peroxide; t-butyl cumyl peroxide; 2,5-dimethyl-2,5-di (t-
Butyl peroxy) hexane; dicumyl peroxide; a, a'-bis (t-butylperoxyisopropyl) benzene; n-butyl-4,4-bis (t-butylperoxy) valerate; 2,2-bis (T-Butylperoxy) bitan; 1,1-bis (t-butylperoxy) cyclohexane; 1,1-bis (t-butylperoxy) -3,3,5-trimethylcyclohexane; t-
Butyl peroxy benzade; benzoyl peroxide; tert-butyl peroxyacetate; 2,5-dimethyl-2,5-bis (tertiary butyl peroxy) hexyne-3; 1,1-bis (tertiary butyl peroxy) ) -3,
3,5-Trimethylcyclohexane; 1,1-Bis (tertiary butylperoxy) -cyclohexane; Methyl ethyl ketone peroxide; 2,5-Dimethylhexyl-
2,5-bisperoxybenzoate; tert-butyl hydroperoxide; p-mencun hydroperoxide; p-chlorobenzoyl peroxide; tert-butylperoxyisobutyrate; hydroxyhebutylperoxide; chlorohexanone peroxide And so on.
【0014】これら過酸化物は少なくとも1種、又は混
合して用いられ、通常EVA100重量部当たり5重量
部又はそれ以下で充分である。有機酸化物は通常ポリマ
ーに対して押出機やロールミル等で混合されるが、エチ
レンビニルアセテート共重合体からなるシートに含浸法
により添加してもよい。At least one of these peroxides is used, or a mixture thereof is used, and usually 5 parts by weight or less per 100 parts by weight of EVA is sufficient. The organic oxide is usually mixed with the polymer by an extruder, a roll mill, or the like, but may be added to a sheet made of an ethylene vinyl acetate copolymer by an impregnation method.
【0015】エチレンビニルアセテート共重合体に接着
促進剤として配合されるシランカップリング剤には、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トリメ
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
シプロピルトリエトキシシラン、β−(3,4−エポキ
シシクロヘキシル)エチルトリメトロキシシラン、γ−
クロロプロピルトリメトキシシラン、ビニルトリクロロ
シラン、γ−メルカプトプロピルトリエトキシシラン、
N−β−(アミノエチル)−γ−アミノプロピルトリメ
トキシシランなどがある。The silane coupling agent to be added to the ethylene vinyl acetate copolymer as an adhesion promoter includes vinyltriethoxysilane, vinyltris (β-methoxyethoxy) silane, γ-methacryloxypropyltrimethoxysilane and vinyltriacetoxy. Silane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, β- (3,4-epoxycyclohexyl) ethyltrimetoxysilane, γ-
Chloropropyltrimethoxysilane, vinyltrichlorosilane, γ-mercaptopropyltriethoxysilane,
Examples include N-β- (aminoethyl) -γ-aminopropyltrimethoxysilane.
【0016】これらは少なくとも1種又は混合して用い
られ、通常、EVA100重量部当たり0.05〜10
部、好ましくは5部以下でよい。エチレンビニルアセテ
ート共重合体には、上記以外に紫外線吸収剤、老化防止
剤、染料加工助剤等を少量含ませることもある。At least one of these is used or a mixture thereof is used, and usually 0.05 to 10 per 100 parts by weight of EVA.
Parts, preferably 5 parts or less. In addition to the above, the ethylene vinyl acetate copolymer may contain a small amount of an ultraviolet absorber, an antiaging agent, a dye processing aid, and the like.
【0017】前記架橋剤及びシランカップリング剤を配
合したエチレンビニルアセテート共重合体の成膜手段と
しては、図1に示す押出装置1を使用して満足できる。
該押出装置1は115mmΦシングル押出機2に、14
00mm幅のコートハンガータイプTダイ3を装着して
なる。As the film forming means of the ethylene vinyl acetate copolymer containing the cross-linking agent and the silane coupling agent, the extruder 1 shown in FIG. 1 can be used.
The extruder 1 is a 115 mmΦ single extruder 2 with 14
It is equipped with a coat hanger type T die 3 having a width of 00 mm.
【0018】しかして、Tダイ3から押出成形されたシ
ート4はシリコンゴムロール5、エンボスロール(金
属)6、キャスティングロール7を経て、アニールロー
ル8〜11を通して歪みを修正し、テンションロール1
2〜15を経て巻き取り機16にてロール状に巻き取ら
れる。勿論、図1に示す押出装置1は成膜手段の1例で
あって、これに限定されるものではない。The sheet 4 extruded from the T-die 3 passes through the silicon rubber roll 5, the embossing roll (metal) 6, the casting roll 7 and the annealing rolls 8 to 11 to correct the strain, and the tension roll 1
After 2 to 15, it is wound into a roll by the winder 16. Of course, the extrusion device 1 shown in FIG. 1 is an example of the film forming means, and is not limited to this.
【0019】前記成膜されたEVAシートには所定量の
放射線(γ線又は電子ビーム)を照射して放射線架橋を
促して低温域での流動性(加熱収縮性)を制御する。こ
の照射量は4KGy〜20KGy、好ましくは5KGy
〜15KGyが良い。即ち、照射量が4KGy未満であ
ると、放射線照射しないものと加熱収縮性において異な
らないし、20KGyを超えると、黄色に変色(黄変)
して透明性が損なわれてしまうためである。The EVA sheet thus formed is irradiated with a predetermined amount of radiation (γ ray or electron beam) to promote radiation crosslinking, thereby controlling fluidity (heat shrinkability) in a low temperature range. This irradiation amount is 4 KGy to 20 KGy, preferably 5 KGy
~ 15KGy is good. That is, when the irradiation amount is less than 4 KGy, there is no difference in heat shrinkage from that without irradiation, and when it exceeds 20 KGy, the color changes to yellow (yellowing).
This is because the transparency is lost.
【0020】〔試験1〕今、図2(a)に示す如く温水
槽20内の80°Cの温水中に、放射線処理したEVA
シート及び無処理EVAシートを100平方mmサイズ
にカットしてなる試験片(厚さ0.6mm)21をメッ
シュ籠22に入れて20秒間、浸漬すると、試験片21
は押出方向(矢印Y方向)の両端21a、21bが図2
(b)の左図から右図の如く収縮する。その収縮率を測
定した処、次の結果を得た。[Test 1] Now, as shown in FIG. 2 (a), the radiation-treated EVA is placed in hot water at 80 ° C. in the hot water tank 20.
A test piece (thickness 0.6 mm) 21 obtained by cutting a sheet and an untreated EVA sheet into a size of 100 mm 2 is placed in a mesh basket 22 and immersed for 20 seconds to give a test piece 21.
Both ends 21a and 21b in the extrusion direction (arrow Y direction) are shown in FIG.
It contracts from the left figure of (b) to the right figure. When the shrinkage ratio was measured, the following results were obtained.
【0021】VA=33%品の場合 ブランク 30〜45% 4KGy 28〜32% 5KGy 18〜22% 10KGy 12〜14% 20KGy 5〜 6% 50KGy 3〜 4% 100KGy 3%VA = 33% product Blank 30-45% 4KGy 28-32% 5KGy 18-22% 10KGy 12-14% 20KGy 5-6% 50KGy 3-4% 100KGy 3%
【0022】VA=25%品の場合 ブランク 41〜45% 5KGy 36〜42% 20KGy 12〜16% 50KGy 6〜10%In the case of VA = 25% product Blank 41-45% 5KGy 36-42% 20KGy 12-16% 50KGy 6-10%
【0023】上記結果からVA=33%品の場合では、
ブランクの30〜45%に対して、ほぼ1/2まで収縮
が抑えられている5KGy以上の放射線照射量が好まし
いことが判る。尤も、収縮の制御性では放射線照射量が
増えれば増えるだけ向上するが、放射線照射量が20K
Gyを超えると、ガラスとの接着性が低下するとともに
黄変することとなって使用不能となる。従って、EVA
シートに対する放射線の照射は5KGy以上、20KG
y以下(好ましくは15KGy以下)の限られた範囲内
で行うことが好ましい。From the above results, in the case of VA = 33% product,
It can be seen that the radiation dose of 5 KGy or more, which is capable of suppressing the shrinkage to about 1/2, is preferable to 30 to 45% of the blank. However, the controllability of contraction improves as the radiation dose increases, but the radiation dose is 20K.
When it exceeds Gy, the adhesiveness to glass is deteriorated and it turns yellow, which makes it unusable. Therefore, EVA
Irradiation of the sheet with radiation of 5 KGy or more, 20 KG
It is preferable to carry out within a limited range of y or less (preferably 15 KGy or less).
【0024】また、VA=25%品の場合には5KGy
以上、20KGy以下(好ましくは10KGy以下)の
限られた範囲内で行うことが好ましい。When VA = 25%, 5KGy
As described above, it is preferable to perform the treatment within a limited range of 20 KGy or less (preferably 10 KGy or less).
【0025】〔試験2〕今、室温が23〜25°Cに調
整された室内に、図3(a)に示す如くヒーター板30
上にガラス板(215mm×235mm×厚さ3.5m
m)31をエンボス面を上向きに乗せ、該ガラス板31
上に放射線処理したEVAシート及び無処理EVAシー
トを200平方mmサイズにカットしてなる試験片(厚
さ0.6mm)32をエンボス面を上向きにして乗せ
る。そして、図3(b)の如く試験片32の周囲に沿っ
てガラス板31上に表線33を入れる。[Test 2] Now, as shown in FIG. 3A, the heater plate 30 is placed in a room whose room temperature is adjusted to 23 to 25 ° C.
Glass plate on top (215mm x 235mm x thickness 3.5m
m) 31 is placed with the embossed surface facing upward, and the glass plate 31
A test piece (thickness: 0.6 mm) 32 obtained by cutting the radiation-treated EVA sheet and untreated EVA sheet into a size of 200 mm 2 is placed with the embossed surface facing upward. Then, as shown in FIG. 3B, the front line 33 is put on the glass plate 31 along the periphery of the test piece 32.
【0026】しかる後、ヒーター板30を103°C±
2で3分間加熱すると、試験片32の四隅角部〜
は、押出方向(矢印Y方向)に沿って前後方向に図3
(c)の如く表線33から内側点1a、2a、3a、4
aまで収縮する。その表線33から1a、2a、3a、
4a点の寸法を測定した処、VA=33%品の無処理E
VAシートではそれぞれ7〜20mm程度の範囲で寸法
のばらつきがあったが、放射線処理したEVAシートで
は〜のばらつきは次の数値以下であった。Thereafter, the heater plate 30 is placed at 103 ° C ±
When heated at 2 for 3 minutes, the four corners of the test piece 32
In the front-back direction along the extrusion direction (arrow Y direction).
As shown in (c), the inner points 1a, 2a, 3a, 4 from the front line 33
Shrink to a. From the front line 33 to 1a, 2a, 3a,
When the dimension at point 4a was measured, VA = 33% untreated E
The VA sheets each had a variation in size within a range of about 7 to 20 mm, but the radiation-treated EVA sheet had a variation in to less than or equal to the following numerical value.
【0027】 4KGy 8mm 5KGy 6mm 10KGy 4mm 20KGy 4mm 50KGy 2mm4KGy 8mm 5KGy 6mm 10KGy 4mm 20KGy 4mm 50KGy 2mm
【0028】上記結果からVA=33%品の場合で、放
射線処理したEVAシートの収縮は放射線照射量が4K
Gyでも基準の10mm以下であり使用できるが、放射
線照射量が20KGyを超えると、前述の如くガラスと
の接着性が低下するとともに黄変することとなる。な
お、VA=25%品の場合では、無処理のEVAシート
では〜の寸法は25mm以上のばらつきが生ずる
が、放射線処理したEVAシートで5KGy以上では基
準の10mm以下であった。From the above results, in the case of VA = 33% product, the radiation-treated EVA sheet shrinks when the radiation dose is 4K.
Gy is 10 mm or less, which is the standard, and can be used. However, when the radiation dose exceeds 20 KGy, the adhesiveness with glass decreases and the material turns yellow as described above. In the case of a VA = 25% product, the untreated EVA sheet varies in size by 25 mm or more, but the radiation-treated EVA sheet of 5 KGy or more is less than the standard 10 mm.
【0029】〔試験3〕次に、DVE(Dynamic Visco-
Elastic Analyzer=レオロジ社製)を使用して放射線処
理したEVAシート(VA=33%品)からなる試験片
を用いて動的粘弾性率を測定(基本周波数10,000
Hz、振幅1.91μm、HSI=100°C)した。
この試験片は非照射品と放射線照射量が5KGyのもの
及び20KGyのものの3種を用意した。[Test 3] Next, DVE (Dynamic Visco-
Dynamic viscoelastic modulus was measured (fundamental frequency 10,000) using a test piece composed of EVA sheet (VA = 33% product) which was subjected to radiation treatment using Elastic Analyzer (manufactured by Rheology).
Hz, amplitude 1.91 μm, HSI = 100 ° C.).
Three types of test pieces were prepared: a non-irradiated article, a test piece with a radiation dose of 5 KGy, and a test piece with a dose of 20 KGy.
【0030】その結果を図4(a)に非照射品を、図4
(b)に5KGy品をそれぞれ示した。これらの図から
判るように、非照射品は90°C程度までしか測定でき
なかったのに対し、5KGy品の場合には130°Cま
で測定できた。このことは何らかの分子的な結合により
流動性が確実に抑えられていることを示している。The results are shown in FIG. 4 (a) for the non-irradiated product and FIG.
The products of 5KGy are shown in (b). As can be seen from these figures, the non-irradiated product could be measured only up to about 90 ° C, whereas the 5KGy product could be measured up to 130 ° C. This indicates that the fluidity is surely suppressed by some kind of molecular bond.
【0031】なお、トルエン法でゲル量を測定すると、
4KGy〜10KGyで放射線処理したEVAシートに
はゲル量は検出できないが、動的粘弾性率の測定範囲が
高温側に延びていることから所定のゲル分率を保有する
ことは明らかである。When the gel amount is measured by the toluene method,
The amount of gel cannot be detected in the EVA sheet that has been subjected to radiation treatment with 4 KGy to 10 KGy, but it is clear that it has a predetermined gel fraction because the measurement range of the dynamic viscoelasticity extends to the high temperature side.
【0032】尤も、放射線照射量が20KGyで処理し
たEVAシートではトルエン法で測定しても28%のゲ
ルが残り、上記同様に動的粘弾性率の測定の結果、図示
を省略したが、測定範囲が150°Cまで延び、溶融域
における流動性が制御されていることが判った。Of course, in the EVA sheet treated with a radiation dose of 20 KGy, 28% of the gel remained even when measured by the toluene method, and although the dynamic viscoelasticity was measured in the same manner as above, the illustration was omitted. It was found that the range extended to 150 ° C and the fluidity in the melting zone was controlled.
【0033】[0033]
【発明の効果】以上の如く、本発明の太陽電池封止用シ
ートは、架橋剤及びシランカップリング剤を配合したエ
チレンビニルアセテート共重合体からなるシートであっ
て、一定のゲル分率まで放射線架橋させたから、溶融域
における流動性が制御でき、加熱収縮が小さく、穴開き
現象を有効に防止できる効果がある。INDUSTRIAL APPLICABILITY As described above, the solar cell encapsulating sheet of the present invention is a sheet composed of an ethylene vinyl acetate copolymer mixed with a crosslinking agent and a silane coupling agent, and has a radiation content up to a certain gel fraction. Since they are cross-linked, the fluidity in the melting region can be controlled, the heat shrinkage is small, and the hole-opening phenomenon can be effectively prevented.
【0034】また、本発明の太陽電池封止用シートの製
造方法は、架橋剤及びシランカップリング剤を配合した
エチレンビニルアセテート共重合体からなり、成膜後に
所定量の放射線を照射して製造するから、EVAシート
の成膜までの生産速度は落とすことがないという効果を
奏するものである。The method for producing a solar cell encapsulating sheet of the present invention comprises an ethylene vinyl acetate copolymer containing a cross-linking agent and a silane coupling agent, and is produced by irradiating a predetermined amount of radiation after film formation. Therefore, the production rate until the film formation of the EVA sheet is not reduced.
【図1】EVAシートの成膜手段を示す略示的正面図で
ある。FIG. 1 is a schematic front view showing a film forming means of an EVA sheet.
【図2】温水浸漬試験法を示す略示的断面図である。FIG. 2 is a schematic sectional view showing a hot water immersion test method.
【図3】ガラス/ヒーター板を用いた試験法を示し、
(a)は正面図、(b)は測定前の平面図、(c)は測
定時の平面図である。FIG. 3 shows a test method using a glass / heater plate,
(A) is a front view, (b) is a plan view before measurement, (c) is a plan view at the time of measurement.
【図4】DVEを用いてEVAシートの動的粘弾性率を
測定した結果を示すグラフで、(a)は放射線照射量が
4KGyのもの、(b)放射線照射量が5KGyのもの
である。FIG. 4 is a graph showing the results of measurement of the dynamic viscoelasticity of an EVA sheet using DVE. (A) shows a radiation dose of 4 KGy and (b) a radiation dose of 5 KGy.
1 押出装置 2 押出機 3 Tダイ 4 シート 5 シリコンゴムロール 6 エンボスロール(金属) 7 キャスティングロール 8〜11 アニールロール 12〜15 テンションロール 16 巻き取り機 20 温水槽 21 試験片 22 メッシュ籠 30 ヒーター板 31 ガラス板 32 試験片 33 ガラス板上に入れた表線 DESCRIPTION OF SYMBOLS 1 Extruder 2 Extruder 3 T die 4 Sheet 5 Silicon rubber roll 6 Embossing roll (metal) 7 Casting roll 8-11 Annealing roll 12-15 Tension roll 16 Winder 20 Hot water tank 21 Test piece 22 Mesh basket 30 Heater plate 31 Glass plate 32 Test piece 33 Front line put on glass plate
Claims (2)
したエチレンビニルアセテート共重合体からなるシート
であって、一定のゲル分率まで放射線架橋させたことを
特徴とする太陽電池封止用シート。1. A sheet for encapsulating a solar cell, which is a sheet made of an ethylene vinyl acetate copolymer containing a cross-linking agent and a silane coupling agent, which is radiation-crosslinked to a certain gel fraction.
したエチレンビニルアセテート共重合体からなり、成膜
後に所定量の放射線を照射することを特徴とする太陽電
池封止用シートの製造方法。2. A method for producing a solar cell encapsulating sheet, comprising an ethylene vinyl acetate copolymer containing a cross-linking agent and a silane coupling agent, and irradiating a predetermined amount of radiation after the film formation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7113840A JPH08283696A (en) | 1995-04-14 | 1995-04-14 | Sheet for sealing solar cell and its production |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7113840A JPH08283696A (en) | 1995-04-14 | 1995-04-14 | Sheet for sealing solar cell and its production |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH08283696A true JPH08283696A (en) | 1996-10-29 |
Family
ID=14622377
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7113840A Pending JPH08283696A (en) | 1995-04-14 | 1995-04-14 | Sheet for sealing solar cell and its production |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH08283696A (en) |
Cited By (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006186237A (en) * | 2004-12-28 | 2006-07-13 | Du Pont Mitsui Polychem Co Ltd | Method of manufacturing solar cell sealing material |
WO2007119767A1 (en) * | 2006-04-13 | 2007-10-25 | Mitsui Chemicals, Inc. | Thermoplastic resin composition, sheet for sealing solar cell, and solar cell |
WO2009125685A1 (en) | 2008-04-09 | 2009-10-15 | 旭化成イーマテリアルズ株式会社 | Sealing resin sheet |
JP2009249556A (en) * | 2008-04-09 | 2009-10-29 | Asahi Kasei E-Materials Corp | Resin sealing sheet |
JP2009253130A (en) * | 2008-04-09 | 2009-10-29 | Asahi Kasei E-Materials Corp | Resin sealing sheet |
JP2010031232A (en) * | 2008-07-03 | 2010-02-12 | Asahi Kasei E-Materials Corp | Sealing resin sheet, solar battery module using it, and composite material |
JP2010059277A (en) * | 2008-09-02 | 2010-03-18 | Asahi Kasei E-Materials Corp | Resin sheet for sealing and solar cell using the same |
JP2010226042A (en) * | 2009-03-25 | 2010-10-07 | Asahi Kasei E-Materials Corp | Low crosslinking resin sealing sheet and solar cell module using the same |
JP2010221671A (en) * | 2009-03-25 | 2010-10-07 | Asahi Kasei E-Materials Corp | Resin sealing sheet |
JP2010226046A (en) * | 2009-03-25 | 2010-10-07 | Asahi Kasei E-Materials Corp | Resin sealing sheet |
JP2010226048A (en) * | 2009-03-25 | 2010-10-07 | Asahi Kasei E-Materials Corp | Resin sealing sheet |
JP2010222545A (en) * | 2009-03-25 | 2010-10-07 | Asahi Kasei E-Materials Corp | Method for producing resinous sealed sheet, and resinous sealed sheet |
JP2010226040A (en) * | 2009-03-25 | 2010-10-07 | Asahi Kasei E-Materials Corp | Solar cell module |
JP2010222541A (en) * | 2009-03-25 | 2010-10-07 | Asahi Kasei E-Materials Corp | Resin seal sheet |
JP2010226044A (en) * | 2009-03-25 | 2010-10-07 | Asahi Kasei E-Materials Corp | Method for manufacturing resin sealing sheet |
JP2010226050A (en) * | 2009-03-25 | 2010-10-07 | Asahi Kasei E-Materials Corp | Resin sealing sheet |
JP2010226054A (en) * | 2009-03-25 | 2010-10-07 | Asahi Kasei E-Materials Corp | Resin sealing sheet |
WO2010140343A1 (en) | 2009-06-01 | 2010-12-09 | 三井化学株式会社 | Ethylene resin composition, sealing material for solar cell, and solar cell module utilizing the sealing material |
WO2011040391A1 (en) | 2009-09-29 | 2011-04-07 | 日立化成工業株式会社 | Fluorescent material for converting wavelengths, resin composition for converting wavelengths containing the fluorescent material, solar cell module produced using the fluorescent material or the resin composition, process for producing resin composition for converting wavelengths, and process for producing solar cell module |
JP2011074264A (en) * | 2009-09-30 | 2011-04-14 | Asahi Kasei E-Materials Corp | Resin sealing sheet |
JP2011119406A (en) * | 2009-12-02 | 2011-06-16 | Asahi Kasei E-Materials Corp | Method of manufacturing solar cell sealing sheet, and solar cell sealing sheet |
JP2011140662A (en) * | 2011-03-24 | 2011-07-21 | Asahi Kasei E-Materials Corp | Resin sealing sheet |
CN102329596A (en) * | 2010-08-16 | 2012-01-25 | 无锡中阳新能源科技有限公司 | High-thermal conductivity insulating packaging material for solar thermoelectricity utilization and preparation method thereof |
WO2012033119A1 (en) * | 2010-09-08 | 2012-03-15 | 電気化学工業株式会社 | Resin having improved adhesion properties, and sheet |
JP2012082355A (en) * | 2010-10-13 | 2012-04-26 | Denki Kagaku Kogyo Kk | Resin with improved adhesiveness and sheet |
US8338697B2 (en) | 2004-11-25 | 2012-12-25 | Mitsui Chemicals, Inc. | Propylene resin composition and use thereof |
JP5182432B2 (en) * | 2009-09-29 | 2013-04-17 | 凸版印刷株式会社 | Sealing material sheet |
US8525017B2 (en) | 2005-11-25 | 2013-09-03 | Mitsui Chemicals, Inc. | Sealing material for solar battery, sheet for sealing solar battery, and solar battery module using the same |
JP2013229380A (en) * | 2012-04-24 | 2013-11-07 | Dainippon Printing Co Ltd | Seal material sheet for solar cell module and method of manufacturing the same |
JP2015509864A (en) * | 2012-01-06 | 2015-04-02 | エルジー・ケム・リミテッド | Sealing film |
CN104558802A (en) * | 2015-01-08 | 2015-04-29 | 上海海优威新材料股份有限公司 | Surface radiation pre-crosslinking ethylene-vinyl acetate resin film for photovoltaic module and preparation method of resin film |
JP2017512846A (en) * | 2014-02-24 | 2017-05-25 | 上海海▲優▼威新材料股▲ふん▼有限公司Shanghai HIUV New Materials Co., Ltd. | Pre-irradiated cross-linked polyolefin adhesive film and method of preparation and method and assembly for packaging |
WO2018043182A1 (en) * | 2016-08-29 | 2018-03-08 | 日本ゼオン株式会社 | Method for producing adhesive sheet |
-
1995
- 1995-04-14 JP JP7113840A patent/JPH08283696A/en active Pending
Cited By (46)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9969853B2 (en) | 2004-11-25 | 2018-05-15 | Mitsui Chemicals, Inc. | Propylene based resin composition and use thereof |
US9963567B2 (en) | 2004-11-25 | 2018-05-08 | Mitsui Chemicals, Inc. | Propylene based resin composition and use thereof |
US9908983B2 (en) | 2004-11-25 | 2018-03-06 | Mitsui Chemicals, Inc. | Propylene based resin composition and use thereof |
US9217078B2 (en) | 2004-11-25 | 2015-12-22 | Mitsui Chemicals, Inc. | Propylene based resin composition and use thereof |
US8962974B2 (en) | 2004-11-25 | 2015-02-24 | Mitsui Chemicals, Inc. | Propylene based resin composition and use thereof |
US8946543B2 (en) | 2004-11-25 | 2015-02-03 | Mitsui Chemicals, Inc. | Propylene based resin composition and use thereof |
US8592674B2 (en) | 2004-11-25 | 2013-11-26 | Mitsui Chemicals, Inc. | Propylene based resin composition and use thereof |
US8338697B2 (en) | 2004-11-25 | 2012-12-25 | Mitsui Chemicals, Inc. | Propylene resin composition and use thereof |
JP2006186237A (en) * | 2004-12-28 | 2006-07-13 | Du Pont Mitsui Polychem Co Ltd | Method of manufacturing solar cell sealing material |
US8525017B2 (en) | 2005-11-25 | 2013-09-03 | Mitsui Chemicals, Inc. | Sealing material for solar battery, sheet for sealing solar battery, and solar battery module using the same |
US8067499B2 (en) | 2006-04-13 | 2011-11-29 | Mitsui Chemicals, Inc. | Thermoplastic resin composition, a solar cell sealing sheet, and a solar cell |
US8067502B2 (en) | 2006-04-13 | 2011-11-29 | Mitsui Chemicals, Inc. | Thermoplastic resin composition, a solar cell sealing sheet, and a solar cell |
WO2007119767A1 (en) * | 2006-04-13 | 2007-10-25 | Mitsui Chemicals, Inc. | Thermoplastic resin composition, sheet for sealing solar cell, and solar cell |
US8324321B2 (en) | 2006-04-13 | 2012-12-04 | Mitsui Chemicals, Inc. | Thermoplastic resin composition, a solar cell sealing sheet, and a solar cell |
WO2009125685A1 (en) | 2008-04-09 | 2009-10-15 | 旭化成イーマテリアルズ株式会社 | Sealing resin sheet |
JP2009249556A (en) * | 2008-04-09 | 2009-10-29 | Asahi Kasei E-Materials Corp | Resin sealing sheet |
JP2009253130A (en) * | 2008-04-09 | 2009-10-29 | Asahi Kasei E-Materials Corp | Resin sealing sheet |
JP2010031232A (en) * | 2008-07-03 | 2010-02-12 | Asahi Kasei E-Materials Corp | Sealing resin sheet, solar battery module using it, and composite material |
JP2010059277A (en) * | 2008-09-02 | 2010-03-18 | Asahi Kasei E-Materials Corp | Resin sheet for sealing and solar cell using the same |
JP2010222541A (en) * | 2009-03-25 | 2010-10-07 | Asahi Kasei E-Materials Corp | Resin seal sheet |
JP2010226050A (en) * | 2009-03-25 | 2010-10-07 | Asahi Kasei E-Materials Corp | Resin sealing sheet |
JP2010226054A (en) * | 2009-03-25 | 2010-10-07 | Asahi Kasei E-Materials Corp | Resin sealing sheet |
JP2010226048A (en) * | 2009-03-25 | 2010-10-07 | Asahi Kasei E-Materials Corp | Resin sealing sheet |
JP2010226046A (en) * | 2009-03-25 | 2010-10-07 | Asahi Kasei E-Materials Corp | Resin sealing sheet |
JP2010222545A (en) * | 2009-03-25 | 2010-10-07 | Asahi Kasei E-Materials Corp | Method for producing resinous sealed sheet, and resinous sealed sheet |
JP2010226042A (en) * | 2009-03-25 | 2010-10-07 | Asahi Kasei E-Materials Corp | Low crosslinking resin sealing sheet and solar cell module using the same |
JP2010226044A (en) * | 2009-03-25 | 2010-10-07 | Asahi Kasei E-Materials Corp | Method for manufacturing resin sealing sheet |
JP2010226040A (en) * | 2009-03-25 | 2010-10-07 | Asahi Kasei E-Materials Corp | Solar cell module |
JP2010221671A (en) * | 2009-03-25 | 2010-10-07 | Asahi Kasei E-Materials Corp | Resin sealing sheet |
WO2010140343A1 (en) | 2009-06-01 | 2010-12-09 | 三井化学株式会社 | Ethylene resin composition, sealing material for solar cell, and solar cell module utilizing the sealing material |
US8945701B2 (en) | 2009-06-01 | 2015-02-03 | Mitsui Chemicals Tohcello, Inc. | Ethylene resin composition, sealing material for solar cell, and solar cell module utilizing the sealing material |
JP5182432B2 (en) * | 2009-09-29 | 2013-04-17 | 凸版印刷株式会社 | Sealing material sheet |
WO2011040391A1 (en) | 2009-09-29 | 2011-04-07 | 日立化成工業株式会社 | Fluorescent material for converting wavelengths, resin composition for converting wavelengths containing the fluorescent material, solar cell module produced using the fluorescent material or the resin composition, process for producing resin composition for converting wavelengths, and process for producing solar cell module |
JP2011074264A (en) * | 2009-09-30 | 2011-04-14 | Asahi Kasei E-Materials Corp | Resin sealing sheet |
JP2011119406A (en) * | 2009-12-02 | 2011-06-16 | Asahi Kasei E-Materials Corp | Method of manufacturing solar cell sealing sheet, and solar cell sealing sheet |
CN102329596A (en) * | 2010-08-16 | 2012-01-25 | 无锡中阳新能源科技有限公司 | High-thermal conductivity insulating packaging material for solar thermoelectricity utilization and preparation method thereof |
WO2012033119A1 (en) * | 2010-09-08 | 2012-03-15 | 電気化学工業株式会社 | Resin having improved adhesion properties, and sheet |
JP2012082355A (en) * | 2010-10-13 | 2012-04-26 | Denki Kagaku Kogyo Kk | Resin with improved adhesiveness and sheet |
JP2011140662A (en) * | 2011-03-24 | 2011-07-21 | Asahi Kasei E-Materials Corp | Resin sealing sheet |
JP2015509864A (en) * | 2012-01-06 | 2015-04-02 | エルジー・ケム・リミテッド | Sealing film |
US9698378B2 (en) | 2012-01-06 | 2017-07-04 | Lg Chem, Ltd. | Encapsulation film |
JP2013229380A (en) * | 2012-04-24 | 2013-11-07 | Dainippon Printing Co Ltd | Seal material sheet for solar cell module and method of manufacturing the same |
JP2017512846A (en) * | 2014-02-24 | 2017-05-25 | 上海海▲優▼威新材料股▲ふん▼有限公司Shanghai HIUV New Materials Co., Ltd. | Pre-irradiated cross-linked polyolefin adhesive film and method of preparation and method and assembly for packaging |
CN104558802A (en) * | 2015-01-08 | 2015-04-29 | 上海海优威新材料股份有限公司 | Surface radiation pre-crosslinking ethylene-vinyl acetate resin film for photovoltaic module and preparation method of resin film |
WO2018043182A1 (en) * | 2016-08-29 | 2018-03-08 | 日本ゼオン株式会社 | Method for producing adhesive sheet |
JPWO2018043182A1 (en) * | 2016-08-29 | 2019-06-24 | 日本ゼオン株式会社 | Method of manufacturing adhesive sheet |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPH08283696A (en) | Sheet for sealing solar cell and its production | |
CN110256977B (en) | Single-layer colored EVA film, preparation method and application thereof, and solar cell module | |
CN108148517B (en) | Packaging adhesive film for solar cell and preparation method and application thereof | |
JP3473605B2 (en) | Solar cell manufacturing method | |
JP6572225B2 (en) | Pre-irradiated cross-linked polyolefin adhesive film and method of preparation and method and assembly for packaging | |
US4935470A (en) | Films from ethylene vinyl acetate polymer and triallyl isocyanurate | |
JP4942556B2 (en) | Intermediate film for laminated glass and laminated glass using the same | |
CN111454668B (en) | Co-extrusion adhesive film, solar cell module and double-layer glass | |
EP1164167A1 (en) | Sealing composition and sealing method | |
JPH0624810A (en) | Manufacture of laminated glass | |
USH2280H1 (en) | Ionomeric sheeting in roll form and process for producing same | |
JPS6011342A (en) | Heat-resistant laminate and manufacture thereof | |
JPS5823870A (en) | Bonding method of protective material for solar cell to filler | |
JPH07169986A (en) | Sealing method of amorphous solar cell | |
JP2000183388A (en) | Sealing film for solar cell | |
JPS60226589A (en) | Sealing composition and sealing using the same | |
JP3944619B2 (en) | Manufacturing method of EVA film for sealing | |
JP2010100032A (en) | Method for manufacturing adhesive sheet for solar cell | |
JPH0986562A (en) | Multilayered film | |
EP1099532B1 (en) | Method of surface treating and laminating a fluorine resin | |
JP4343589B2 (en) | Laminated glass manufacturing method | |
JPS58140349A (en) | Sandwich glass | |
CN111892878A (en) | Method for preparing surface pre-crosslinked adhesive film and surface pre-crosslinked adhesive film prepared by method | |
JP4972534B2 (en) | Colored laminated glass | |
JP3990782B2 (en) | Laminated glass intermediate film forming resin composition, laminated glass interlayer film and laminated glass |