JP2012529978A - 落雷からの基材の保護方法 - Google Patents
落雷からの基材の保護方法 Download PDFInfo
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Abstract
Description
本願は、その開示を出典明示によりここに援用する「落雷防護のための硬化性伝導性材料」と題された2009年6月12日出願の米国仮特許出願第61/186415号、及び「電磁波シールド材」と題された2009年6月12日出願の米国仮特許出願第61/186492号に基づく優先権を主張する。
本発明は伝導性高分子材料に関する。より詳細には、本発明は落雷保護(LSP)のために使用される伝導性組成物に関する。
浸漬:179+/−6℃(355+/−10oF),2時間
圧力:3.40atm(50psi)
冷却:〜45−60分の過程に対して最大3.75℃(6oF/分)から27℃(80oF)
静的真空下で一晩空冷
表2は、(図1に層3によって模式的に表される)様々なLSPシステムに対してゾーン1A落雷結果を比較する。様々なパネル及び対応するLSPシステムの特定の詳細は次の通りである:パネルAは落雷保護システムを含んでいなかった、つまり層3(図1参照)はパネル構築中になかった。パネルB及びC(従来技術)は、ガラス繊維隔離層(FGF108−29M−990,Toray Composites America社)と更に組み合わされる表面接着剤フィルムに予め埋め込んで供給されたアルミニウム及び銅エキスパンドメタル箔(EMF)(それぞれAPCM−AME,Plainfield, Connecticut製のSG4528−016AL−104V及びSG4528−04CU−103V)から構成された。隔離層は、EMF−接着剤フィルム及び最上層炭素遷移相(図1の層4)間に位置していた。Ref1及びRef2は、Spirit AeroSystems (SAMPE Journal, Vol. 44, No. 4, July/August 2008, pp. 6-17)のWelch等によって過去に報告された更なるEMFデータを提供する。このレポートに記載されたパネルはここの実施例のために構築されたものに構造が非常に類似している(図1を参照)。Ref1のLSPシステムは、パネルAと同じ構造を有しており、つまりガラス繊維隔離層(Style1581,S2ガラス)に重ねた表面フィルム(Surface Master905)にアルミニウムEMFが埋め込まれる。Ref2に対するLSPは、表面フィルム(Surface Master905)に埋め込まれた銅EMFからなる。Ref2は、パネルB、C、及びRef1とは異なり、ガラス隔離層を含まないことに留意のこと。
(b)表面損傷は塗料及び/又は樹脂の焦げ、燃焼、又は蒸発を介して外から見て損傷した円形領域の直径に対応する。
表3は、(図1に絵で層3によって表される)様々なLSPシステムに対してゾーン2A落雷結果を比較する。パネルG(従来技術)は、フィルム接着剤(HCS2404−050,242g/m2,Heatcon(登録商標) Composites)と組み合わせたアルミニウムEMF(Grade 016, Pacific Coast Composites)から構成され、更にガラス繊維隔離層(FGF108−29M−990,Toray Composites America, Inc)と組み合わされた。隔離層はEMF-接着剤フィルムと最上部炭素繊維層間に位置していた。パネルHは、伝導性ペースト及び溶剤混合物に対して継ぎの成分を使用した以外はパネルFと同じようにして調製した。伝導性ペースト:25.1wt%のビスフェノールFのジグリシジルエーテル、9.6wt%のアミン付加物硬化剤、及び65.3wt%の銀フレーク(17体積%)。溶剤混合物:重量で、50%のアセトン、18%のトルエン、16%のメチルエチルケトン、11%の酢酸エチル、及び5%のリグロイン。
先に述べたように、本発明の材料の自己組織化性は材料の硬化中に連続の伝導性経路を形成する能力を有している。この特徴は、構造の元の構築及び既存のものの修理中に一般的に遭遇する接合面(例えば2つの隣接部分の継ぎ部)を電気的にブリッジすることを可能にするので、特に独特である。更に、この方法によりLSP製造方法を自動化することを可能にする。金属箔に基づく従来の材料は、継ぎ部に連続接合面を形成する能力を欠いており、これが別個のLSP EMF間の接合面にわたって非常に大きな電気抵抗をしばしば生じさせる。更に、これらのLSPの自動化は、継ぎ面問題、脆さ、及び重量問題のために禁じられる。
ゾーン1Aのシミュレーションした稲妻に先に打たれた複合材サンドイッチパネルを試験標本として使用した。二つのタイプのパネルを使用した:エキスパンド銅箔に基づくパネルG(従来技術)及び自己組織化接着剤塗膜に基づくパネルH。双方のパネルを、FAステップ・サンドアプローチ法(DOT/FAA/AR−03/74)を使用するA承認法に従って修理した。双方のパネルを、実施例1に記載された上述の自己組織化スプレー接着剤に基づくスプレー溶液で修理した。接着剤・溶剤混合物をHVLPスプレーガン(15−30psiの空気,1.4mmの先端)に充填し、修復したパネルに塗布した。
本発明の自己組織化接着剤ペーストを、次の処方を使用して調製した:25.3wt%のビスフェノールFのジグリシジルエーテル、9.7wt%のアミン付加物硬化剤、及び65.0wt%の銀フレーク(約17体積%)。該成分を、Hauschild DAC150FVミキサーにおいて均一になるまで混合した。
本発明の実施態様に係る自己組織化LSP材料を市販の炭素繊維強化ポリマー(CFRP)層に塗布した。これらの表面CFRP層の下の支持構造はNomex(登録商標)ハニカムコア及び背面側の更なるCFRP層であった。これらのフラットパネルを355+/−10oFでオートクレーブにて同時硬化させた。結果は、一面にLSP塗膜を有する24”×24”×〜0.5”に切り取られた十分に硬化されたCFRPハニカムパネルであった。
Claims (30)
- 落雷から基材を保護するための方法であって、基材を提供し、該基材に落雷保護組成物を供することを含み、ここで、落雷保護剤は、自己組織化して硬化プロセス中に伝導性経路を形成可能な充填硬化性材料を含有する方法。
- 硬化性材料が硬化性有機化合物及びフィラーを含む請求項1に記載の方法。
- フィラー及び有機化合物が該有機化合物の硬化中に相互作用を示し、該相互作用によりフィラーが伝導性経路に自己組織化せしめられる請求項2に記載の方法。
- 組成物が硬化され、それによって貫通する伝導性経路を生じる請求項1に記載の方法。
- 硬化された自己組織化組成物の伝導性が、等量の伝導性フィラーを有する硬化された非自己組織化組成物の伝導性の100倍より多い請求項4に記載の方法。
- 硬化性有機化合物が、ビスフェノールFのジグリシジルエーテルを含む請求項2に記載の方法。
- 硬化性有機化合物が更に硬化剤を含む請求項6に記載の方法。
- 硬化剤が、無水フタル酸及びジエチレントリアミン間の反応に基づくポリアミン無水物付加物を含む請求項7に記載の方法。
- フィラーが銀を含む請求項1に記載の方法。
- フィラーが非極性塗料を更に含む請求項9に記載の方法。
- 塗料がステアリン酸を含む請求項10に記載の方法。
- 材料を硬化させるために組成物を加熱する工程を更に含む請求項1に記載の方法。
- フィラー粒子を焼結して焼結伝導性自己組織化経路を形成する請求項1に記載の方法。
- 組成物が基材に噴霧される請求項1に記載の方法。
- 組成物が、基材に適用される場合にBステージ膜を含む請求項1に記載の方法。
- 基材が輸送体を含む請求項1に記載の方法。
- 輸送媒体が航空機を含む請求項16に記載の方法。
- 落雷保護組成物が、プリプレグ基材を更に含む積層構造に組み込まれる請求項1に記載の方法。
- 積層構造が更なるプレフォーム伝導性マトリックスを更に含む請求項18に記載の方法。
- プレフォーム伝導性マトリックスがエキスパンドメタル箔を含む請求項19に記載の方法。
- 自己組織化材料が少なくとも一つの電気装置のためのアース経路を更に提供する請求項1に記載の方法。
- 落雷保護組成物が、1MHzと20GHzの間の周波数を有する電磁放射線の遮蔽を更に提供し、ここで、該遮蔽は少なくとも20デシベルの電磁放射を減じる請求項1に記載の方法。
- 組成物が40体積パーセント未満の伝導性フィラーを含む請求項1に記載の方法。
- 組成物が15体積パーセント未満の伝導性フィラーを含む請求項1に記載の方法。
- 基材に落雷保護組成物を供する工程が、
少なくとも一つの非連続的伝導性経路を含む落雷保護システムの損傷部位を特定する工程;
損傷部位に組成物を付着させる工程;及び
付着させた組成物を硬化させて、損傷部位に少なくとも一つの伝導性経路を完成させる少なくとも一つの自己組織化伝導性経路を提供する工程
を具備する請求項1に記載の方法。 - 損傷した落雷保護システムが、伝導性エキスパンドメタル箔、金属網、炭素−金属繊維共織物、金属化炭素、又は充填伝導性ポリマーの少なくとも一つを含む請求項25に記載の方法。
- 損傷した落雷保護システムが、自己組織化して硬化プロセス中に伝導性経路を形成可能な硬化性材料を含む請求項25に記載の方法。
- 落雷保護(LSP)複合材の非破壊試験方法において、
落雷保護を提供可能な伝導性組成物を提供すること;
組成物の電気特性を測定すること;及び
組成物の測定した電気特性を組成物の過去に劣化したサンプルの導電率と同一とみなして複合材の劣化度を決定する工程
を含む方法。 - 組成物が、自己組織化して硬化プロセス中に伝導性経路を形成可能な硬化性材料を含む請求項28に記載の方法。
- 電気特性が電気抵抗率を含む請求項28に記載の方法。
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| PCT/US2010/038250 WO2010144762A1 (en) | 2009-06-12 | 2010-06-11 | Method for protecting a substrate from lightning strikes |
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| JP2012515168A Pending JP2012529978A (ja) | 2009-06-12 | 2010-06-11 | 落雷からの基材の保護方法 |
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| EP (2) | EP2440623B1 (ja) |
| JP (2) | JP5744015B2 (ja) |
| KR (2) | KR20120037464A (ja) |
| CN (2) | CN102803406B (ja) |
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| JP2015502465A (ja) * | 2011-12-19 | 2015-01-22 | イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニーE.I.Du Pont De Nemours And Company | 構造コア |
| JP2016505105A (ja) * | 2013-01-10 | 2016-02-18 | エルクレス | 雷保護構造およびその製造方法 |
| JP2016515298A (ja) * | 2013-02-21 | 2016-05-26 | スリーエム イノベイティブ プロパティズ カンパニー | 電磁干渉軽減特性を有するポリマー複合物 |
| WO2020003610A1 (ja) * | 2018-06-28 | 2020-01-02 | 三菱重工業株式会社 | 複合材及び複合材の硬化方法 |
| JP2020001270A (ja) * | 2018-06-28 | 2020-01-09 | 三菱重工業株式会社 | 複合材及び複合材の硬化方法 |
| JP7039401B2 (ja) | 2018-06-28 | 2022-03-22 | 三菱重工業株式会社 | 複合材及び複合材の硬化方法 |
| US11926131B2 (en) | 2018-06-28 | 2024-03-12 | Mitsubishi Heavy Industries, Ltd. | Composite material and method for curing composite material |
| JP2023013996A (ja) * | 2021-07-15 | 2023-01-26 | ザ・ボーイング・カンパニー | 伝導性ポリマーコーティング組成物及びその製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2440622B1 (en) | 2016-08-31 |
| JP2012530359A (ja) | 2012-11-29 |
| BR112012000203B1 (pt) | 2020-01-28 |
| US20160362565A1 (en) | 2016-12-15 |
| CN102803405A (zh) | 2012-11-28 |
| WO2010144762A1 (en) | 2010-12-16 |
| US20100315105A1 (en) | 2010-12-16 |
| BR112012000203A2 (pt) | 2016-11-22 |
| KR20120037464A (ko) | 2012-04-19 |
| JP5744015B2 (ja) | 2015-07-01 |
| KR20120046164A (ko) | 2012-05-09 |
| EP2440623A1 (en) | 2012-04-18 |
| BRPI1010855A2 (pt) | 2016-04-05 |
| CN102803405B (zh) | 2016-06-08 |
| WO2010144770A1 (en) | 2010-12-16 |
| US20110014356A1 (en) | 2011-01-20 |
| EP2440623B1 (en) | 2016-10-05 |
| US20170226351A9 (en) | 2017-08-10 |
| EP2440622A1 (en) | 2012-04-18 |
| CN102803406B (zh) | 2015-10-14 |
| CN102803406A (zh) | 2012-11-28 |
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