JP6985427B2 - 支持型エラストマー発泡体及び支持型エラストマー発泡体を製造する方法 - Google Patents
支持型エラストマー発泡体及び支持型エラストマー発泡体を製造する方法 Download PDFInfo
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- JP6985427B2 JP6985427B2 JP2019569381A JP2019569381A JP6985427B2 JP 6985427 B2 JP6985427 B2 JP 6985427B2 JP 2019569381 A JP2019569381 A JP 2019569381A JP 2019569381 A JP2019569381 A JP 2019569381A JP 6985427 B2 JP6985427 B2 JP 6985427B2
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- elastomer
- foam
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- adhesive
- porous layer
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- B32B2307/748—Releasability
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/752—Corrosion inhibitor
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- 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
- B32B2310/00—Treatment by energy or chemical effects
- B32B2310/08—Treatment by energy or chemical effects by wave energy or particle radiation
- B32B2310/0806—Treatment by energy or chemical effects by wave energy or particle radiation using electromagnetic radiation
- B32B2310/0831—Treatment by energy or chemical effects by wave energy or particle radiation using electromagnetic radiation using UV radiation
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2405/00—Adhesive articles, e.g. adhesive tapes
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- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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- 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
- B32B2581/00—Seals; Sealing equipment; Gaskets
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- 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
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- C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
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Description
本出願は2017年6月15日付けで出願された米国仮出願第62/520,421号の優先権を主張する。この全体の開示内容はあらゆる目的でその全体を参照することにより本明細書中に援用される。
実施例1
第1実施例によれば、発泡領域を一方の側で支持する補強領域を形成するために、初期厚が約34μmであり密度が約0.27g/cm3である単一のePTFE多孔質層を使用して、支持型エラストマー発泡体を形成した。ペルフルオロポリエーテルエラストマーSIFEL 2618 (日本国東京在、信越化学工業株式会社)をエラストマーとして選択し、そしてこれを、発泡剤としてのEXPANCEL 951 DU 120 膨張性ポリマー球体(スウェーデン国Sundsvall在、Expancel)と、15:01混合質量比で混合した。混合物をePTFE多孔質層内に吸収させ、そして150℃で10分間にわたって熱処理することにより発泡剤を活性化する前に、1.321mmのツールギャップでドローダウンした。ひとたび膨張したら、複合体を100℃で60分間にわたって硬化させた。
第2実施例によれば、発泡領域を一方の側で支持する補強領域を形成するために、初期厚が約34μmであり密度が約0.27g/cm3である単一のePTFE多孔質層を使用して、支持型エラストマー発泡体を形成した。ペルフルオロポリエーテルエラストマーSIFEL 2618 (日本国東京在、信越化学工業株式会社)をエラストマーとして選択し、そしてこれを、発泡剤としてのEXPANCEL 920 DU 20 膨張性ポリマー球体(スウェーデン国Sundsvall在、Expancel)と、10:01混合質量比で混合した。混合物をePTFE多孔質層内に吸収させ、そして150℃で10分間にわたって熱処理することにより発泡剤を活性化する前に、0.229mmのツールギャップでドローダウンした。ひとたび膨張したら、複合体を100℃で60分間にわたって硬化させた。
第3実施例によれば、発泡領域を一方の側で支持する補強領域を形成するために、初期厚が約34μmであり密度が約0.27g/cm3である単一のePTFE多孔質層を使用して、支持型エラストマー発泡体を形成した。ペルフルオロポリエーテルエラストマーSIFEL 2618 (日本国東京在、信越化学工業株式会社)をエラストマーとして選択し、そしてこれを、発泡剤としてのEXPANCEL 951 DU 120及びEXPANCEL 920 DU 40 膨張性ポリマー球体(スウェーデン国Sundsvall在、Expancel)の組み合わせと、10:01混合質量比で混合した。951 DU 120と920 DU 40との質量比は1:2であった。混合物をePTFE多孔質層内に吸収させ、そして150℃で10分間にわたって熱処理することにより発泡剤を活性化する前に、0.178mmのツールギャップでドローダウンした。ひとたび膨張したら、複合体を100℃で60分間にわたって硬化させた。
第4実施例によれば、発泡領域を一方の側で支持する補強領域を形成するために、初期厚が約34μmであり密度が約0.27g/cm3である単一のePTFE多孔質層を使用して、支持型エラストマー発泡体を形成した。シリコーンエラストマーSS-156 (米国オハイオ州Cuyahoga Falls在、Silicone Solutions)をエラストマーとして選択し、そしてこれを、発泡剤としてのEXPANCEL 920 DU 20 膨張性ポリマー球体(スウェーデン国Sundsvall在、Expancel)と、10:01混合質量比で混合した。混合物をePTFE多孔質層内に吸収させ、そして150℃で10分間にわたって熱処理することにより発泡剤を活性化する前に、0.229mmのツールギャップでドローダウンした。ひとたび膨張したら、複合体を110℃で30分間にわたって硬化させた。
第5実施例によれば、発泡領域を一方の側で支持する補強領域を形成するために、初期厚が約34μmであり密度が約0.27g/cm3である単一のePTFE多孔質層を使用して、支持型エラストマー発泡体を形成した。シリコーンエラストマーSS-2600 (米国オハイオ州Cuyahoga Falls在、Silicone Solutions, Ltd.)をエラストマーとして選択した。このエラストマーは予混合された発泡剤を含む。混合物をePTFE多孔質層内に吸収させ、そして1.321mmのツールギャップでドローダウンした。キャスティング集成体を室温で120分間にわたって発泡させ硬化させておいた。
第6実施例によれば、発泡領域を一方の側で支持する補強領域を形成するために、初期厚が約8μmであり密度が約0.18g/cm3である単一のePTFE多孔質層を使用して、支持型エラストマー発泡体を形成した。ペルフルオロポリエーテルエラストマーSIFEL 2618 (日本国東京在、信越化学工業株式会社)をエラストマーとして選択し、そしてこれを、発泡剤としてのEXPANCEL 951 DU 120及びEXPANCEL 920 DU 40 膨張性ポリマー球体(スウェーデン国Sundsvall在、Expancel)の組み合わせと、10:01混合質量比で混合した。951 DU 120と920 DU 40との質量比は1:2であった。混合物をePTFE多孔質層内に吸収させ、そして150℃で10分間にわたって熱処理することにより発泡剤を活性化する前に、0.178mmのツールギャップでドローダウンした。ひとたび膨張したら、複合体を100℃で60分間にわたって硬化させた。
第7実施例によれば、発泡領域を一方の側で支持する補強領域を形成するために、初期厚が約71μmであり開口率が約22%であるポリエーテルエーテルケトン(PEEK)製織多孔質層を使用して、支持型エラストマー発泡体を形成した。ペルフルオロポリエーテルエラストマーSIFEL 2618 (日本国東京在、信越化学工業株式会社)をエラストマーとして選択し、そしてこれを、発泡剤としてのEXPANCEL 951 DU 120 膨張性ポリマー球体(スウェーデン国Sundsvall在、Expancel)と、15:01混合質量比で混合した。混合物を多孔質層内に吸収させ、そして150℃で10分間にわたって熱処理することにより発泡剤を活性化する前に、1.321mmのツールギャップでドローダウンした。ひとたび膨張したら、複合体を100℃で60分間にわたって硬化させた。補強領域の多孔質層の下側で、両加熱サイクルの前に複合体に剥離ライナーを被着することにより、液体混合物が硬化される前に多孔質層を通って滴下するのを防止した。
第8実施例によれば、発泡領域を両方の側でサンドイッチ形態を成して支持する2つの補強領域を形成するために、それぞれ初期厚が約8μmであり密度が約0.18g/cm3である2つのePTFE多孔質層を使用して、支持型エラストマー発泡体を形成した。ペルフルオロポリエーテルエラストマーSIFEL 2618 (日本国東京在、信越化学工業株式会社)をエラストマーとして選択し、そしてこれを、発泡剤としてのEXPANCEL 951 DU 120及びEXPANCEL 920 DU 40 膨張性ポリマー球体(スウェーデン国Sundsvall在、Expancel)の組み合わせと、10:01混合質量比で混合した。951 DU 120と920 DU 40との質量比は1:2であった。混合物を両ePTFE多孔質層内に吸収させ、そして150℃で10分間にわたって熱処理することにより発泡剤を活性化する前に、0.178mmのツールギャップでドローダウンした。ひとたび膨張したら、複合体を100℃で60分間にわたって硬化させた。
第9実施例によれば、発泡領域を両方の側でサンドイッチ形態を成して支持する2つの補強領域を形成するために、それぞれ初期厚が約34μmであり密度が約0.27g/cm3である2つのePTFE多孔質層を使用して、支持型エラストマー発泡体を形成した。ペルフルオロポリエーテルエラストマーSIFEL 2618 (日本国東京在、信越化学工業株式会社)をエラストマーとして選択し、そしてこれを、発泡剤としてのEXPANCEL 920 DU 20 膨張性ポリマー球体(スウェーデン国Sundsvall在、Expancel)と、10:01混合質量比で混合した。混合物を両ePTFE多孔質層内に吸収させ、そして150℃で10分間にわたって熱処理することにより発泡剤を活性化する前に、0.229mmのツールギャップでドローダウンした。ひとたび膨張したら、複合体を100℃で60分間にわたって硬化させた。
第10実施例によれば、発泡領域を両方の側でサンドイッチ形態を成して支持する2つの補強領域を形成するために、それぞれ初期厚が約34μmであり密度が約0.27g/cm3である2つのePTFE多孔質層を使用して、支持型エラストマー発泡体を形成した。シリコーンエラストマーSS-156 (米国オハイオ州Cuyahoga Falls在、Silicone Solutions, Ltd.)をエラストマーとして選択し、そしてこれを、発泡剤としてのEXPANCEL 920 DU 20 膨張性ポリマー球体(スウェーデン国Sundsvall在、Expancel)と、10:01混合質量比で混合した。混合物を両ePTFE多孔質層内に吸収させ、そして150℃で10分間にわたって熱処理することにより発泡剤を活性化する前に、0.229mmのツールギャップでドローダウンした。ひとたび膨張したら、複合体を110℃で30分間にわたって硬化させた。
第11実施例によれば、発泡領域を両方の側でサンドイッチ形態を成して支持する2つの補強領域を形成するために、それぞれ初期厚が約8μmであり密度が約0.18g/cm3である2つのePTFE多孔質層を使用して、支持型エラストマー発泡体を形成した。ペルフルオロポリエーテルエラストマーSIFEL 2661 (日本国東京在、信越化学工業株式会社)をエラストマーとして選択し、そしてこれを、発泡剤としてのEXPANCEL 951 DU 120及びEXPANCEL 920 DU 40 膨張性ポリマー球体(スウェーデン国Sundsvall在、Expancel)の組み合わせと、10:01混合質量比で混合した。951 DU 120と920 DU 40との質量比は1:2であった。混合物をePTFE多孔質層内に吸収させ、そして150℃で10分間にわたって熱処理することにより発泡剤を活性化する前に、0.178mmのツールギャップでドローダウンした。ひとたび膨張したら、複合体を100℃で60分間にわたって硬化させた。
第12実施例によれば、発泡領域を両方の側でサンドイッチ形態を成して支持する2つの補強領域を形成するために、それぞれ初期厚が約34μmであり密度が約0.27g/cm3である2つのePTFE多孔質層を使用して、支持型エラストマー発泡体を形成した。シリコーンエラストマーSS-2600 (米国オハイオ州Cuyahoga Falls在、Silicone Solutions, Ltd.)をエラストマーとして選択した。このエラストマーは予混合された発泡剤を含む。混合物を両ePTFE多孔質層内に吸収させ、そして1.321mmのツールギャップでドローダウンした。キャスティング集成体を室温で120分間にわたって発泡させ硬化させておいた。
第13実施例によれば、発泡領域を両方の側でサンドイッチ形態を成して支持する2つの補強領域を形成するために、それぞれ初期厚が約34μmであり密度が約0.27g/cm3である2つのePTFE多孔質層を使用して、支持型エラストマー発泡体を形成した。FL 60-9201(米国ミシガン州Auburn在Dow Corning Co.)をエラストマーとして選択し、そしてこれを、発泡剤としてのEXPANCEL 920 DU 20 膨張性ポリマー球体(スウェーデン国Sundsvall在、Expancel)と、10:01混合質量比で混合した。エラストマーと発泡剤との混合物にメチルエチルケトン(MEK)を溶媒として添加し、混合物を17質量%のMEKにすることにより、混合物の粘度を低下させ、そして基体の孔への含浸プロセスを容易にした。混合物を両ePTFE多孔質層内に吸収させ、そして150℃で10分間にわたって熱処理することにより発泡剤を活性化する前に、0.229mmのツールギャップでドローダウンし、次いで2分間にわたって乾燥させておいた。ひとたび膨張したら、複合体を100℃で60分間にわたって硬化させた。
第14実施例によれば、発泡領域を一方の側で支持する補強領域を形成するために、初期厚が約34μmであり密度が約0.27g/cm3である単一のePTFE多孔質層を使用して、支持型エラストマー発泡体を形成した。ペルフルオロポリエーテルエラストマーSIFEL 2618 (日本国東京在、信越化学工業株式会社)をエラストマーとして選択し、そしてこれを、発泡剤としてのEXPANCEL 951 DU 120及びEXPANCEL 920 DU 40 膨張性ポリマー球体(スウェーデン国Sundsvall在、Expancel)の組み合わせと、10:01混合質量比で混合した。951 DU 120と920 DU 40との質量比は1:2であった。混合物をePTFE多孔質層内に吸収させ、そして150℃で10分間にわたって熱処理することにより発泡剤を活性化する前に、0.178mmのツールギャップでドローダウンした。ひとたび膨張したら、複合体を100℃で60分間にわたって硬化させた。エラストマーマトリックスが硬化された後、複合体の支持側に接着剤を被着した。シリコーン感圧接着剤PSA-16(米国オハイオ州Cuyahoga Falls在、Silicone Solutions, Ltd.)の円形ドットを複合体の面に液体として被着し、次いで熱を用いて硬化させた。液体接着剤を基剤:触媒比16:1まで混合し、複合体に被着し、次いで約2分間にわたって150℃まで加熱することにより硬化させた。
厚さ、密度、及びパーセント圧縮率
物理的厚さ、密度、及びパーセント圧縮率メトリクスを試験するために、下記手順を実施した。先ず、支持型エラストマー発泡体の各試料をパンチで2.263cm直径に切断し、精密スケール上で秤量し、次いでINSTRON 5565 動的機械分析装置(米国マサチューセッツ州在Instron Tool Works)のプラテン上に置いた。試料の上側に1.786cm直径の圧縮ディスクを置いた。圧縮応力歪み試験を開始した。ここで分析装置ヘッドは0.74Nの荷重に達するまで、歪み速度0.06mm/minで動く。圧縮ディスクの質量及びサイズとともに、これは3.45kPaの試料に対する圧力をもたらした。試料の厚さは、ロードセルのノイズフロアをちょうど上回る0.48kPaで抽出された。この厚さ、及び前に測定された質量を用いて、各試料の密度を計算した。分析装置は0.74Nに達したら、歪み速度0.6mm/minで試料を圧縮し続ける一方で、そのロードセルの荷重データを取得することによって応力歪み曲線を作成した。試料の圧縮歪みはこの曲線を表すために1MPa及び16MPaの圧力で抽出した。
下記手順に従って、支持型エラストマー発泡体の断面を視覚的に検査することにより、総厚に対する各補強領域の相対的な厚さを測定した。断面された表面を保存しようと、液体窒素浸漬型の鋼カミソリ刃で試料を切断した。切断されたこれらの試料を接着剤に取り付け、測定のためにSEM内に置いた。各試料の総厚及び各支持層の総厚を測定した。各補強領域の厚さを各試料の総厚で割り算することにより、パーセント支持率を計算した。各試料の発泡領域内で生成されたボイドのサイズを、選択ボイドの断面積が目に見える断面された表面を視覚的に検査することによって見極めることができる。
各試料を所定の直径約8mmにパンチで切断し、RS17動的機械分析装置(米国デラウェア州New Castle在TA Instruments)のプラテン上に置いた。試料を目標歪み(下述)まで圧縮することにより「ローディング」する一方、応力歪みローディング曲線を生成するために応力を測定した。次いで圧縮ディスクを持ち上げて元の位置に戻すことにより、試料を「アンローディング」する一方、応力歪みアンローディング曲線を生成するために応力を測定した。典型的には、アンローディング曲線は、0パーセント歪みに達する前に公称歪みにおいて無視し得る応力又はゼロ応力を測定した。アンローディング曲線生成中にもはや圧縮応力がなくなったときに試料にまだ印加される圧縮歪みの量を、試料のメトリックとして抽出した。このアンローディング歪みメトリックを求め、これを試料のピーク圧縮歪みで割り算することにより、圧縮永久歪みが計算される。ローディング曲線及びアンローディング曲線の総エネルギー差を、繰り返し圧縮中に熱として失われるのではなく各試料によって貯えて戻すことができる機械エネルギー量の指標として使用した。各ローディング曲線における総機械エネルギーは、0パーセント歪みと試料によって到達されたピーク歪みとの間の定積分値を概算することにより計算した。各アンローディング曲線における総機械エネルギーは、試料によって到達されたピーク歪みと、ゼロ応力に達したときの歪み(圧縮永久歪み)との間の定積分値を概算することにより計算した。パーセント歪みエネルギー維持率は、アンローディング曲線から積分値を求め、そしてこれをローディング曲線からの積分値で割り算することにより計算した。
各試料を所定の直径約8mmにパンチで切断し、RS17動的機械分析装置(米国デラウェア州New Castle在TA Instruments)のプラテン上に置いた。各試料を目標歪みまで圧縮する一方、材料係数を動的に測定した。この目標歪みで保持しながら、試料をアンローディングする前の予め設定された時間長にわたって材料係数を連続的にモニタリングした。目標歪みに到達した5分後に測定された係数を、目標歪みに到達した瞬間に測定された係数で割り算することによって、パーセント応力保持率を計算した。
各侵入試料をプレス内のダイで、中心の穴を備えた正方形に切断した。この切断試料を秤量し、浸漬前の質量として取得した。各切断試料を試料と同じ面積寸法を有するステンレス鋼板と、研磨されたプレキシガラス板との間で圧縮した。各スタックアップをマシンボルト及びロックナットによって一緒に保持した。試料なしのスタックアップ高さのマイクロメーター測定値を、未圧縮試料及び圧縮済試料を有する状態で測定された値と比較することにより、各試料のパーセント圧縮率を計算した。ひとたび目標パーセント圧縮率に達したら、各スタックアップをガラス板の側方まで、JP8ジェット燃料中に浸漬し、上方からガラスを通して撮影することにより、20時間にわたって流体浸透に関して視覚的に検査した。この期間後、ボルト締結された界面から試料を取り出し、表面の液体をペーパータオルで軽く乾かし、そして試料を再び秤量し、浸漬後の質量として取得した。%質量ピックアップ率は、浸漬後と浸漬前との試料質量の%差である。次いで、パーセント圧縮率を上記応力歪みの関係と比較することにより、侵入シールにおける応力を推定する。
表1は、上記実施例1〜14のそれぞれの例の構造的特徴に言及する。約0.5kPaの標準印加圧力で、比較例とともに、実施例の厚さ及び密度を得た。比較例は、比較例1:ポリスルフィド液体シーラントPR-1782 B2 (米国ペンシルベニア州Pittsburgh在PPG Industries, Inc.)、比較例2:ショアA硬度50デュロメーター、公称1mm厚のフルオロシリコーンシーラントFLUOROSILICONE 50A、及び比較例3:部品番号SQ-S PTFEシートガスケットとして入手可能な0.5mm厚の単純なePTFEメンブレンINTERTEX ePTFE(米国カリフォルニア州Monterey Park在Inertech, Inc.)を含む。比較例はCE−1、CE−2、及びCE−3として示される。
シーラントのための不連続接着被膜の利点を実証するために、(支持型エラストマー発泡体を含む)シーラントのいくつかの実施例を形成し、そして試験した。
孔の相互接続ネットワークを含む多孔質層を用意し、
エラストマーと発泡剤との液体混合物を多孔質層と一緒にキャスティングし、液体混合物が多孔質層を湿潤するように、多孔質層を液体混合物の第1の側に位置決めし、
液体混合物中に複数の閉じたガス充填セルを形成するように、発泡剤を活性化し、そして、
多孔質層を含む補強領域と、複数のガス充填セルを含有する発泡領域とを含有するエラストマーマトリックスを形成するように、エラストマーを硬化する
ことを含む、乾式シーラント発泡体を形成する方法。
孔の第2相互接続ネットワークを含む第2多孔質層を用意し、
液体混合物が第2多孔質層を湿潤するように、第2多孔質層を液体混合物の第1の側とは反対の第2の側に位置決めし、そして、
第2多孔質層を含む第2補強領域を含有するエラストマーマトリックスを形成するように、エラストマーを硬化することを含む、
前記実施態様のいずれかに記載の方法。
発泡剤を活性化することが、発泡剤が複数の閉じたガス充填セルを形成するように、液体混合物を活性化温度まで加熱することを含む、
前記実施態様のいずれかに記載の方法。
エラストマーによって画定された複数のガス充填セルを含む発泡領域と、
エラストマーを少なくとも部分的に吸収させた孔の相互接続ネットワークを有する多孔質層を含む補強領域とを含む、
前記実施態様のいずれかに記載の圧縮性シール。
Claims (13)
- 支持型エラストマー発泡体を含んでなる乾式シーラントであって、該支持型エラストマー発泡体は、
硬化したエラストマーを含むエラストマーマトリックスを含み、そして前記エラストマーマトリックスが
前記エラストマーによって画定された複数の閉じたガス充填セルを含む発泡領域と、
前記エラストマーを少なくとも部分的に吸収させた孔の相互接続ネットワークを有する多孔質層を含む補強領域と、
を含む、乾式シーラント。 - 前記多孔質層にエラストマーを完全に吸収させている、請求項1に記載の乾式シーラント。
- 前記補強領域が第1補強領域であり、さらに、前記エラストマーを少なくとも部分的に吸収させた孔の第2相互接続ネットワークを有する第2多孔質層を含む第2補強領域を含み、
前記第1補強領域が前記発泡領域の第1の側に位置決めされており、かつ
前記第2補強領域が前記発泡領域の前記第1の側とは反対側の第2の側に位置決めされている、
請求項1又は2に記載の乾式シーラント。 - 補強領域内の多孔質層の孔サイズが、発泡領域内に複数の閉じたガス充填セルを形成するために使用される発泡剤の粒子サイズよりも小さいため、前記補強領域がガス充填セルを実質的に含まない、請求項1〜3のいずれか1項に記載の乾式シーラント。
- 前記エラストマーが第1エラストマーであり、前記エラストマーマトリックスがさらに第2エラストマーを含み、前記第1エラストマーと前記第2エラストマーとが、前記エラストマーマトリックスを形成するように混合されている、請求項1〜4のいずれか1項に記載の乾式シーラント。
- 前記多孔質層が、織布材料、延伸フルオロポリマーフィルム、延伸ポリテトラフルオロエチレン(ePTFE)フィルム、ポリエーテルエーテルケトン(PEEK)織布、又はガラス繊維材料のうちの1種を含む、請求項1〜5のいずれか1項に記載の乾式シーラント。
- 前記多孔質層が、厚さ1〜100μmのePTFEフィルムを含む、請求項1〜5のいずれか1項に記載の乾式シーラント。
- 前記多孔質層が、厚さ8〜35μmのePTFEフィルムを含む、請求項7に記載の乾式シーラント。
- 前記エラストマーがシリコーン、フルオロシリコーン、ペルフルオロポリエーテル、又は他のフルオロエラストマーを含む、請求項1〜8のいずれか1項に記載の乾式シーラント。
- 前記発泡領域が、前記エラストマーと発泡剤とを含む発泡混合物、前記エラストマーに添加された化学的発泡剤、又は、前記エラストマーと任意に熱活性化型膨張性ポリマー球体を含む熱活性化型乾式発泡剤とを含む発泡混合物、のうちの1種から形成されている、請求項1〜9のいずれか1項に記載の乾式シーラント。
- さらに、前記エラストマーマトリックスの第1表面又は第2表面のうちの少なくとも一方に結合された不連続接着領域のパターンを含み、前記エラストマー発泡体が前記第1表面又は第2表面に対して垂直な方向に圧縮されたときに、前記エラストマーマトリックスが、前記接着領域を介して流体が侵入するのを防止するために前記接着領域の周囲に追従するように作用することができる、請求項1〜10のいずれか1項に記載の乾式シーラント。
- 請求項1〜11のいずれか1項に記載の乾式シーラントを含む乾式シーリングガスケット又は乾式シーリングワッシャ。
- 乾式シーラント発泡体を形成する方法であって、
孔の相互接続ネットワークを含む多孔質層を用意し、
エラストマーと発泡剤との液体混合物を前記多孔質層と一緒にキャスティングし、前記液体混合物が前記多孔質層を湿潤するように、前記多孔質層を前記液体混合物の第1の側に位置決めし、
前記液体混合物中に複数の閉じたガス充填セルを形成するように、前記発泡剤を活性化し、そして、
前記多孔質層を含む補強領域と、前記複数のガス充填セルを含有する発泡領域とを含有するエラストマーマトリックスを形成するように、前記エラストマーを硬化する
ことを含む、乾式シーラント発泡体を形成する方法。
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