JP5694286B2 - 自己接着性複合補強材 - Google Patents
自己接着性複合補強材 Download PDFInfo
- Publication number
- JP5694286B2 JP5694286B2 JP2012500193A JP2012500193A JP5694286B2 JP 5694286 B2 JP5694286 B2 JP 5694286B2 JP 2012500193 A JP2012500193 A JP 2012500193A JP 2012500193 A JP2012500193 A JP 2012500193A JP 5694286 B2 JP5694286 B2 JP 5694286B2
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- JP
- Japan
- Prior art keywords
- styrene
- layer
- reinforcing
- thread
- elastomer
- 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.)
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
- Y10T428/269—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension including synthetic resin or polymer layer or component
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2933—Coated or with bond, impregnation or core
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2933—Coated or with bond, impregnation or core
- Y10T428/294—Coated or with bond, impregnation or core including metal or compound thereof [excluding glass, ceramic and asbestos]
- Y10T428/2942—Plural coatings
- Y10T428/2947—Synthetic resin or polymer in plural coatings, each of different type
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Description
本発明は、さらに詳細には、少なくとも1本のコア、特に、金属コアからなり、このコアが熱可塑性材料の1以上の層でシーズまたは被覆されているハイブリッドまたは複合タイプの補強材に関する。
特許出願 EP 0 962 576号は、例えば、耐摩耗性を改良する目的で、ポリエステルまたはポリアミドのような熱可塑性材料によってシーズした鋼製またはアラミド繊維製の補強材を記載している。
特許出願 FR 2 601 293号は、金属コードをポリアミドによってシーズしてこの金属コードを空気式タイヤビード内のビードワイヤーとして使用することを記載しており、このシーズ処理は、有利なことに、このビードワイヤーの形状が、このビードワイヤーが補強するタイヤのビードの構造および操作条件に適応するのを可能にしている。
従って、ジエンゴム物品の設計者、特に、タイヤ製造業者は、現在、上記の欠点の全部または幾つかを軽減することのできる新たな接着剤系または新たな補強材を求めている。
結果として、本発明の第1の主題は、下記を含むことを特徴とする複合補強材である:
・少なくとも1本の補強用スレッド;
・上記スレッドを被覆する、ガラス転移温度がプラスである熱可塑性ポリマーの第1層;および、
・上記第1層を被覆する、ガラス転移温度がマイナスである不飽和熱可塑性スチレンエラストマーを含む第2層。
・上記補強用スレッドを、プラスのガラス転移温度を有する上記熱可塑性ポリマーの層で被覆する工程;
・マイナスのガラス転移温度を有する上記不飽和熱可塑性スチレンエラストマーを含む第2層を、そのようにして被覆した上記スレッド上に付着させる工程;および、
・アッセンブリを熱‐酸化処理に供して上記2つの層を一緒に結合させる工程。
本発明およびその利点は、以下の説明および典型的な実施態様をこれらの実施態様に関連する添付図面と一緒に考慮すれば容易に理解し得るであろう。
さらにまた、“aとbの間”なる表現によって示される値の範囲は、いずれも、aよりも大きいから出発しbよりも小さいに至る値の範囲を示し(即ち、限界値aとbを除く)、一方、“a〜b”なる表現によって示される値の範囲は、いずれも、aから出発しbに至る値の範囲を意味する(即ち、厳格な限定値aおよびbを含む)。
・少なくとも1本の補強用スレッド(即ち、1本以上の補強用スレッド);
・上記スレッド(または上記複数のスレッド)を被覆する、ガラス転移温度(以下、Tg1で示す)がプラスである(即ち、0℃よりも高い)熱可塑性ポリマーの第1層;および、
・上記第1層を被覆する、ガラス転移温度(以下、Tg2で示す)がマイナスである(即ち、0℃よりも低い)不飽和タイプの熱可塑性スチレン(TPS)エラストマーの第2層。
上記または各補強用スレッドは、好ましくは5mmよりも小さい、特に、0.1〜2mmの範囲内の直径を有する。
従って、また、本発明の好ましい実施態様によれば、上記熱可塑性ポリマーと上記不飽和TPSエラストマーとの間のガラス転移温度の差(Tg1−Tg2)は、40℃よりも大きく、より好ましくは60℃よりも大きい。
第1層の最小厚Em1は、好ましくは1μmと2mmの間、より好ましくは10μmと1mmの間である。
もう1つの特定の実施態様によれば、第2層は、例えば、押出によらないでコーティングまたはスプレー法或いは他の薄または超薄付着法によって付着させ、例えば、0.02μmと1μmの間、特に0.05μmと0.5μmの間の厚さを有する薄いまたは超薄接着層によって形成させ得る。
・第1工程において、少なくとも1本の補強用スレッドを、先ず、プラスのガラス転移温度を有する熱可塑性ポリマーの第1層で被覆し;
・次に、第2工程において、マイナスのガラス転移温度を有する不飽和TPSエラストマーの第2層を、そのようにして被覆した上記スレッド(1本以上)上に付着させ;そして、
・最後に、アッセンブリを熱‐酸化処理に供して上記2つの層を一緒に結合させる。
第1の例としては、第2層の意図する厚さが約0.1mmである場合、6,6 ポリアミドで被覆したスレッドを、シーズ処理ヘッドを200℃の温度に加熱し、直径1.1mmの第1カウンターダイと直径1.2mmの第2ダイを装着した押出‐シーズ処理ラインに逆に通し得る。例えば、押出機内で約180℃の温度に加熱した不飽和TPSエラストマーは、そのようにして、上記スレッドを、典型的には数cm3/分〜数十cm3/分の押出ポンプ産出量において典型的には数m/分〜数十m/分の操作速度で上記シーズ処理ヘッドに通すことによって被覆する。
上記の2つの連続するシーズ処理工程においては、上記コード(補強用スレッド)を、有利には、押出ヘッドに通す前に、例えば、高周波発生器にまたは加熱用トンネルに通すことによって予熱する。
処理温度は、例えば、場合に応じての数秒〜数分の処理時間において150℃と300℃の間である;処理時間が短いほど温度は高いことおよび上記加熱処理は、必ずしも、使用する熱可塑性材料に再溶融をそれとも過剰の軟化をもたらす必要はないことはないことを理解されたい。
そのようにして完成させた本発明の複合補強材は、有利には、例えば空気中で冷却して、望ましくない粘着問題を回避すると共に、最終の巻取りリール上に巻上げる。
特に、当業者であれば、処理温度および処理時間を変更して、継続的な近似化により、本発明の特定の実施態様毎に最良の接着結果を得る操作条件を見出すという利益を有するであろう。
また、架橋は、本発明の複合補強材により補強を意図するタイヤ(または、より一般的にはゴム物品)を製造する間にも、そのようなタイヤ(またはゴム物品)を製造するのに使用するジエンゴム組成物中に存在して本発明の複合補強材と接触する固有の架橋系によって生じ得る。
このタイヤ1は、クラウン補強材即ちベルト6によって補強されたクラウン2、2つの側壁3および2つのビード4を有し、これらのビード4の各々は、ビードワイヤー5によって補強されている。クラウン2は、トレッド(この略図には示していない)が取付けられている。カーカス補強材7は、各ビード4内の2本のビード線5の周りに巻付けられており、この補強材7の上返し8は、例えば、タイヤ1の外側に向って位置しており、この場合、タイヤリム9上に取付けて示している。カーカス補強材7は、それ自体知られている通り、コード、いわゆる“ラジアル”コード、例えば、繊維または金属コードによって補強されている少なくとも1枚のプライからなる、即ち、これらのコードは、実際上、互いに平行に配置されて一方のビードから他方のビードに延びて円周正中面(2つのビード4からの中間距離に位置しクラウン補強材6の中央を通るタイヤの回転軸に対して垂直の面)と80°と90°の間の角度をなしている。
試験 1:複合補強材の製造
本発明に従うまたは従わない複合補強材を、先ず、以下の方法で製造した。出発補強用スレッドは、10mmのらせんピッチで一緒に撚り合せた直径0.30mmの2本の個々のスレッドまたはモノフィラメントからなる1×2構造での標準鋼(0.7質量%の炭素含有量を有する)から製造されたタイヤ用のスチールコードであった。コード直径は0.6mmであった。
その後、ゴムと上記で製造した複合補強材との結合の質を、上記補強材を加硫物とも称する加硫ゴム組成物から引き抜くのに要する力を測定する試験によって評価した。このゴム組成物は、天然ゴム、カーボンブラックおよび標準添加剤をベースとする、金属タイヤベルトプライのカレンダー加工において使用する通常の組成物であった。
同じ試験条件下において、ナイロンでシーズ被覆したがRFL接着剤(またはあらゆる他の接着剤)を含有しない対照複合補強材(R‐5)は、ゴムへの接着を示さなかった(実際にゼロの引抜き力)。
また、さらなる試験は、不飽和TPSエラストマー(SBS)の第2シーズ被覆層としてではなくゴムカレンダー加工用組成物中に混入させた接着剤としての使用(従って、複合補強材と常に接触している)は、接着剤寄与をもたらさなかったことを実証していた。
(10) 補強用スレッド
(11) マイナスのガラス転移温度を有する熱可塑性ポリマーの第1層
(12) プラスのガラス転移温度を有する不飽和TPSエラストマーの第2層
Em1 第1層の最小厚
Em2 第1層の最小厚
(20) 補強用スレッド
(20a、20b) 単一フィラメントまたはモノフィラメント
(21) マイナスのガラス転移温度を有する熱可塑性ポリマーの第1層
(22) プラスのガラス転移温度を有する不飽和TPSエラストマーの第2層
(30) 補強用スレッド
(30a、30b) モノフィラメント
(31) マイナスのガラス転移温度を有する熱可塑性ポリマーの第1層
(32) プラスのガラス転移温度を有する不飽和TPSエラストマーの第2層
(40) 補強用スレッド
(41a) 中心またはコア線
(41b) 同じ直径を有する6本のフィラメント
(42) 6,6 ポリアミドの第1層
(43) SBSエラストマーの第2層
2 クラウン
3 側壁
4 ビード
5 ビード線
6 クラウン補強材(ベルト)
7 カーカス補強材
8 カーカス補強材の上返し
9 タイヤリム
Claims (9)
- 下記を含むことを特徴とする、複合補強材:
・少なくとも1本の補強用スレッド;
・前記スレッドを被覆する、ガラス転移温度がプラスである熱可塑性ポリマーの第1層であって、前記熱可塑性ポリマーが、脂肪族ポリアミド、ポリエステル、またはポリイミドである、前記第1層;および、
・前記第1層を被覆する、ガラス転移温度がマイナスである不飽和熱可塑性スチレンエラストマーを含む第2層。 - 前記熱可塑性ポリマーと前記不飽和熱可塑性スチレンエラストマーとのガラス転移温度の差が、60℃よりも大きい、請求項1記載の補強材。
- 前記熱可塑性エラストマーが、スチレンブロックとジエンブロックを含むコポリマーである、請求項1または2記載の補強材。
- 前記ジエンブロックが、イソプレンまたはブタジエンブロックである、請求項3記載の補強材。
- 前記熱可塑性エラストマーが、スチレン/ブタジエン(SB)、スチレン/イソプレン(SI)、スチレン/ブタジエン/ブチレン(SBB)、スチレン/ブタジエン/イソプレン(SBI)、スチレン/ブタジエン/スチレン(SBS)、スチレン/ブタジエン/ブチレン/スチレン(SBBS)、スチレン/イソプレン/スチレン(SIS)、スチレン/ブタジエン/イソプレン/スチレン(SBIS)の各ブロックコポリマー、およびこれらのコポリマーのブレンドからなる群の中から選ばれる、請求項4記載の補強材。
- 前記熱可塑性エラストマーが、SBSまたはSISコポリマーである、請求項5記載の補強材。
- 前記補強用スレッドが、金属線である、請求項1〜6のいずれか1項記載の補強材。
- 請求項1〜7のいずれか1項記載の複合補強材を含む空気式タイヤ。
- 少なくとも下記の工程を含むことを特徴とする、ジエンゴムマトリックスに接着させることのできる請求項1〜7のいずれか1項記載の複合補強材の製造方法:
・前記補強用スレッドを、プラスのガラス転移温度を有する前記熱可塑性ポリマーの層で被覆する工程;
・マイナスのガラス転移温度を有する前記不飽和熱可塑性スチレンエラストマーを含む第2層を、そのようにして被覆した前記スレッド上に付着させる工程;および、
・アッセンブリを熱‐酸化処理に供して前記2つの層を一緒に結合させる工程。
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FR0951782A FR2943269B1 (fr) | 2009-03-20 | 2009-03-20 | Renfort composite auto-adherent |
FR0951782 | 2009-03-20 | ||
PCT/EP2010/053155 WO2010105975A1 (fr) | 2009-03-20 | 2010-03-12 | Renfort composite auto-adherent |
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JP2013542119A (ja) * | 2010-09-23 | 2013-11-21 | コンパニー ゼネラール デ エタブリッスマン ミシュラン | 自己接着性複合補強材を含む空気式タイヤ |
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BR112017025585B1 (pt) | 2015-05-28 | 2021-12-21 | Compagnie Generale Des Etablissements Michelin | Reforço multicompósito feito de vidro-resina aperfeiçoado |
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FR3051473A1 (fr) * | 2016-05-20 | 2017-11-24 | Michelin & Cie | Composite et courroie de transmission de puissance |
JP6785193B2 (ja) * | 2017-06-16 | 2020-11-18 | 株式会社ブリヂストン | タイヤ用樹脂金属複合部材、及びタイヤ |
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JP2020055494A (ja) * | 2018-10-04 | 2020-04-09 | 株式会社ブリヂストン | タイヤ |
FR3087197B1 (fr) | 2018-10-11 | 2020-10-23 | Michelin & Cie | Composant caoutchouc comprenant des elements de renforcement |
FR3090644A3 (fr) | 2018-12-21 | 2020-06-26 | Michelin & Cie | Produit renforce comprenant une composition comportant un compose polysulfuré |
WO2020128261A1 (fr) | 2018-12-21 | 2020-06-25 | Compagnie Generale Des Etablissements Michelin | Produit renforce comprenant une composition comportant un compose polysulfuré |
FR3091206A3 (fr) | 2018-12-30 | 2020-07-03 | Michelin & Cie | Bloc guide-fil pour la fabrication d’éléments de renfort gainés pour pneumatiques |
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FR3143032A1 (fr) | 2022-12-08 | 2024-06-14 | Compagnie Generale Des Etablissements Michelin | Composite pour article de caoutchouc |
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JP4465916B2 (ja) * | 2001-05-09 | 2010-05-26 | 横浜ゴム株式会社 | 熱可塑性エラストマー被覆スチールコードを用いた空気入りタイヤ |
AU2003208965A1 (en) * | 2002-02-04 | 2003-09-02 | Bridgestone Corporation | Belt for a pneumatic tire belt made of differente rubber compositions |
JP4433744B2 (ja) * | 2003-09-26 | 2010-03-17 | 横浜ゴム株式会社 | 積層体及びそれを用いた空気入りタイヤ |
JP2005262672A (ja) * | 2004-03-18 | 2005-09-29 | Sumitomo Rubber Ind Ltd | スチールコードプライの製造方法、スチールコードプライ及びそれを用いた空気入りタイヤ |
FR2869618B1 (fr) * | 2004-04-30 | 2008-10-10 | Michelin Soc Tech | Composition de caoutchouc a adhesion amelioree vis a vis d'un renfort metallique. |
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JP4442700B2 (ja) * | 2008-05-19 | 2010-03-31 | 横浜ゴム株式会社 | 空気入りタイヤ及びその製造方法 |
JP2010053495A (ja) * | 2008-08-29 | 2010-03-11 | Yokohama Rubber Co Ltd:The | タイヤ補強用スチールコード及びこれを使用した空気入りタイヤ |
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2009
- 2009-03-20 FR FR0951782A patent/FR2943269B1/fr not_active Expired - Fee Related
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2010
- 2010-03-12 US US13/257,824 patent/US8973634B2/en not_active Expired - Fee Related
- 2010-03-12 WO PCT/EP2010/053155 patent/WO2010105975A1/fr active Application Filing
- 2010-03-12 EP EP10707922.0A patent/EP2408612B1/fr active Active
- 2010-03-12 JP JP2012500193A patent/JP5694286B2/ja active Active
- 2010-03-12 CN CN201080012989.8A patent/CN102361746B/zh active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2013542119A (ja) * | 2010-09-23 | 2013-11-21 | コンパニー ゼネラール デ エタブリッスマン ミシュラン | 自己接着性複合補強材を含む空気式タイヤ |
Also Published As
Publication number | Publication date |
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US8973634B2 (en) | 2015-03-10 |
CN102361746A (zh) | 2012-02-22 |
US20120125506A1 (en) | 2012-05-24 |
CN102361746B (zh) | 2014-10-29 |
FR2943269B1 (fr) | 2011-04-22 |
EP2408612A1 (fr) | 2012-01-25 |
FR2943269A1 (fr) | 2010-09-24 |
WO2010105975A1 (fr) | 2010-09-23 |
JP2012520945A (ja) | 2012-09-10 |
EP2408612B1 (fr) | 2013-05-15 |
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