JP4423853B2 - Airbag base fabric and airbag - Google Patents
Airbag base fabric and airbag Download PDFInfo
- Publication number
- JP4423853B2 JP4423853B2 JP2002376972A JP2002376972A JP4423853B2 JP 4423853 B2 JP4423853 B2 JP 4423853B2 JP 2002376972 A JP2002376972 A JP 2002376972A JP 2002376972 A JP2002376972 A JP 2002376972A JP 4423853 B2 JP4423853 B2 JP 4423853B2
- Authority
- JP
- Japan
- Prior art keywords
- base fabric
- fabric
- airbag
- coating
- width
- 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.)
- Expired - Lifetime
Links
Landscapes
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Woven Fabrics (AREA)
- Air Bags (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、樹脂が積層されているエアバッグ用基布に関するものであり、更に詳しくは、樹脂が織物に積層された基布の厚み差を改善し、かつ織物の耳端部の耳たぶりによる塗工幅の減少を改善した経済性に優れたエアバッグ用基布およびエアバッグおよびその製造方法に関するものである。
【０００２】
【従来の技術】
従来、エアバッグには、耐熱性、難燃性、空気遮断性などの機能を付与することを目的に、１００〜９００デシテックスのナイロン６６、ナイロン６またはポリエステルなどのフィラメント糸からなる織物にクロロプレン、シリコーン、ウレタンなどの合成樹脂を塗布することが一般に行われている。かかる合成樹脂の塗布には一般にナイフコーターやコンマコーターが使用されており、上記のエアバッグの機能を保持し、かつ、収納コンパクト性、コストダウンを目的に、樹脂量をより少なく均一にコートすることが要求されている。しかし、現状では、エアバッグ基布のようなカバーファクターが１，４００〜２，３００の範囲内にある高密度織物においては製織時に生じる耳たぶりの問題があり、従来の塗布方法ではその耳端部の耳たぶりにより織物の端部に皺が生じ樹脂が塗布できず、実際にエアバッグとして使用できる織物幅は織り幅に対し９０％程度になり織物のロスが生じるものである。
【０００３】
そこで、近年、このような問題を解消するために、耳端部の織り密度が他本体基布より高くすることや耳端部に増糸が打ち込まれていることを特徴とする耳たぶりを改善する方法が開示されているが（例えば、特許文献１、２参照）十分なものではない。また、耳部にレノ組織とちがう地糸より細い糸で２本を絡み糸の単位として地糸２本と交互に挿入し耳たぶりを改善する方法が開示されているが（例えば、特許文献３参照）、工程が増えコストアップになり十分なものではない。安全部品であるエアバッグにもコストダウンなどの経済的要求が高まっており、製造ロスの少ない経済性に優れたエアバッグが切望されている。
【０００４】
【特許文献１】
特開平９−３０２５４９号公報
【０００５】
【特許文献２】
特開平９−３０２５５０号公報
【０００６】
【特許文献３】
特開２００２−２１２８５６号公報
【０００７】
【発明が解決しようとする課題】
本発明は、かかる従来のエアバッグの欠点に鑑み、エアバッグとしての機械的特性、空気遮断性、収納コンパクト性を兼ね備え、かつ、裁断時のロスが少なく、コストパフォーマンスに優れたエアバッグ用基布を提供するものである。
【０００８】
【課題を解決するための手段】
本発明は、かかる課題を解決するために、次のような手段を採用する。すなわち、
（１）合成繊維からなり、織糸の繊度が３５０ｄｔｅｘ以上、カバーファクターが２１６５以上である織物に、粘度が５〜２０Ｐａ・ｓの範囲内の合成樹脂をフローティングナイフコーターにより、ナイフと該織物との接圧を１〜１５Ｎ／ｃｍの範囲内で、かつ、基布張力が５００〜３，０００Ｎ／ｍの範囲内で塗工して得られたエアバッグ用基布であって、該基布の中央部の厚みＴ１と塗工端部の厚みＴ２との関係が、０．９５≦Ｔ１／Ｔ２≦１であり、かつ、該基布の基布幅Ｗと樹脂が塗工された塗工幅Ｃとの関係が０．９５≦Ｃ／Ｗ≦０．９９の範囲内にあることを特徴とするエアバッグ用基布。
ここに、
Ｔ１：基布の真ん中から１ｃｍ間隔の５点の厚みの平均値
Ｔ２：塗工された端から基布の内側へ１ｃｍ間隔３点ずつで両端６点の厚みの平均値Ｔ１／Ｔ２：Ｔ１をＴ２で割った値
Ｗ：基布の基布幅
Ｃ：基布において樹脂が塗工された塗工幅（コーティング基布としてエアバッグに有効に活用できる基布幅）
Ｃ／Ｗ：ＣをＷで割った値
（２）該織物の精練加工を施さずに該合成樹脂を塗工したことを特徴とする、（１）に記載のエアバッグ用基布。
（３）ＪＩＳ Ｌ１０９６ Ａ法に規定される方法で測定した通気度が０．０１ｃｃ／ｃｍ２／ｓｅｃ以下であることを特徴とする、請求項（１）または（２）に記載のエアバッグ用基布。
（４）該合成樹脂の付着量が５〜３０ｇ／ｍ２であることを特徴とする、請求項（１）〜（３）のいずれかに記載のエアバッグ用基布。
（５）請求項１〜（４）のいずれかに記載のエアバッグ用基布からなるエアバッグ。
【０００９】
【発明の実施の形態】
本発明は、合成繊維からなる織物の少なくとも片面に合成樹脂が積層されたエアバッグ用基布であって、該基布の中央部の厚みＴ１と塗工端部の厚みＴ２との関係が、０．９≦Ｔ１／Ｔ２であり、かつ、該基布の基布幅Ｗと樹脂が塗工された塗工幅Ｃとの関係が０．９５≦Ｃ／Ｗ≦０．９９の範囲内にあることを基本とし、これによって、エアバッグとしての機械的特性、空気遮断性、収納コンパクト性を兼ね備え、かつ、裁断時のロスが少なく、コストパフォーマンスを著しく高くすることを達成し、実現したものである。ここで、塗工幅とはコーティング基布としてエアバッグに有効に活用できる基布幅のことをいう。
【００１０】
本発明を構成する合成繊維からなる織物としては、ナイロン６・６、ナイロン６、ナイロン１２、ナイロン４・６、ナイロン６とナイロン６・６との共重合体、ナイロン６にポリアルキレングリコール、ジカルボン酸やアミンなどを共重合した共重合体等からなるポリアミド繊維、ポリエチレンテレフタレート、ポリブチレンテレフタレートなどのポリエステル繊維、ポリエステルの繰り返し単位を構成する酸成分にイソフタル酸、５−ナトリウムスルホイソフタル酸またはアジピン酸などの脂肪族ジカルボン酸などを共重合した共重合体等からなるポリエステル繊維、パラフェニレンテレフタルアミドおよび芳香族エーテルとの共重合体に代表されるアラミド繊維、レーヨン繊維、サルフォン系繊維、超高分子量ポリエチレン繊維および上記合成繊維を主体とする海島構造を有する高分子配列体繊維から構成される織物が用いられる。これらの織物の中でもポリアミド繊維、ポリエチレンテレフタレート繊維からなる織物が好ましく、さらにはナイロン６６繊維、ナイロン６繊維が耐衝撃性の面から好ましい。
【００１１】
かかる繊維には、原糸の製造工程や加工工程での生産性あるいは特性改善のために使用される各種添加剤を含んでもよい。たとえば熱安定剤、酸化防止剤、光安定剤、平滑剤、帯電防止剤、可塑剤、増粘剤、顔料、難燃剤などを含有せしめることができる。
【００１２】
織物を構成する織糸の繊度は、好ましくは９０〜６００デシテックスの範囲内、さらに好ましくは１５０〜４７０デシテックスの範囲内にあるものが、機械的強度と厚み、重量のバランスから好ましい。すなわち９０デシテックス未満では厚み、重量の観点からは好ましいが機械的強度が不足し、６００デシテックスを超えると厚み、重量が大きくなり収納性の面で劣る。
【００１３】
かかる織糸を構成する繊維の単繊維繊度は、好ましくは１〜６．５デシテックスの範囲内、さらに好ましくは２〜４．５デシテックスの範囲内にあることが収納性、樹脂との接着性の点から良い。１デシテックス未満では糸の生産性が悪化しやすくなるという問題があり、６．５デシテックスを超えると織物が厚くなり、エアバッグ用基布を折り畳むときに基布反発も強く、収納性の面で劣る。
【００１４】
また、織糸の単糸断面形状は丸に限らずいずれの形であってもよい。たとえば、扁平、長方形、菱形、繭型のような左右対称型は勿論、左右非対称型でも良く、あるいはそれらの組み合わせ型でも良い。さらに、突起や凹凸、中空糸があっても良い。特に好ましくは断面の長軸と短軸との比、すなわちアスペクト比が１．８〜６の扁平断面糸を用いると基布の厚みを薄くすることができ収納性が向上する面から良い。また、扁平断面糸を用いると織物表面の凹凸が小さくなり、かつ、織物を構成する織り糸間に生じる空隙を小さくすることができ、その空隙を埋めて塗工するには少ない樹脂量で良いので、収納性やコストの面で好ましい。
【００１５】
また、織糸は無撚りの方が低塗工の面で好ましい。撚りがかかっていると、マルチフィラメントが収束するため、織物表面の凹凸が増し、樹脂で織物表面の凹凸を埋めるためにはより多くの樹脂量を必要とし、基布重量が大きくなり収納性が悪化するばかりか、樹脂量が多くなるためコストがかかる。
【００１６】
本発明の基布を構成する織物を製織する織機は、工業用織物を製織するのに用いられる各種織機から適宜選定すればよく、例えば、シャトル織機、ウォータージェット織機（ＷＪＬ）、エアージェット織機（ＡＪＬ）、レピア織機などから選べばよい。そのなかでもエアバッグの難燃性に影響する懸念のある基布の残留油剤を小さくすることや生産性の点で、ウォータージェット織機（ＷＪＬ）が好ましく用いられる。
【００１７】
本発明を構成する織物は、平組織、綾組織、朱子組織及びこれらの変形組織等を使用することができるが、これらに特に限定されるものではない。これらの織組織の中でも、織物コスト及びエアバッグの等方展開性の面から平組織が好ましく使用される。かかる織物としては、対称組織である必然性はなく、非対称組織であってもよい。ここでいう非対称組織としては、例えば、平組織織物でタテ糸とヨコ糸の糸本数が異なるもの、タテ、ヨコの一方の糸種が異なるもの、タテ、ヨコの一方がリップストップや空羽組織になっているもの等の組織が異なるもの等を使用することができる。
【００１８】
本発明を構成する織物に積層される合成樹脂としては、ポリウレタン系、ポリエステル系、ポリアミド系、アクリル系、シリコーン系、フッ素系、ポリエチレン系、スチレンブタジエン系、ニトリルブタジエン系などの合成樹脂の１種以上を用いることができるが、特にこれらに限定されるものではない。また、かかる合成樹脂は、溶剤系、水系、水分散系樹脂のいずれをも適宜使用することができる。 なかでも、シリコーン系樹脂が耐熱性の面から好ましく使用される。
【００１９】
本発明における合成樹脂の付着量は、好ましくは５〜３０ｇ／ｍ２の範囲内、より好ましくは８〜２０ｇ／ｍ２の範囲内にあるのが、基布の厚さ、重量、空気遮断性、さらに収納性の面から良い。
【００２０】
本発明におけるエアバッグ用基布の中央部の厚みＴ１と塗工端部の厚みＴ２の関係が、０．９≦Ｔ１／Ｔ２であり、より好ましくは０．９５≦Ｔ１／Ｔ２である。Ｔ１／Ｔ２が０．９より小さくなると裁断縫製後のバッグにおいても厚みのばらつきが大きくなり、そのことからバッグを展開させたときに等方的に展開せず、乗員をより速く受け止める高速展開性能が劣る。また、展開時の高温ガスがバッグに不均一にあたるため、バッグが熱による損傷を大きく受ける場合があり良くない。
【００２１】
本発明のエアバッグ用基布は、その基布の基布幅Ｗと樹脂が塗工された塗工幅Ｃの関係が０．９５≦Ｃ／Ｗ≦０．９９であることが好ましい。０．９５よりも小さいと、バッグ裁断時のロスが大きく、コストパフォーマンスの面で劣る。０．９９よりも大きくなると樹脂塗工後の熱セットで基布の両端を把持する部分が樹脂塗工部となり、皺の原因になり品位面で劣る。
【００２２】
本発明のエアバッグ基布の通気度は０．０１ｃｃ／ｃｍ2／ｓｅｃ以下であることが好ましい。かかる通気度に調整することにより、各種部位のエアバッグ設計範囲が広くなり、インフレータブルカーテン、ニーエアバッグ、スマートバッグ等の極めて低い通気度を要求される用途にも好ましく使用することができる。
【００２３】
また、本発明のエアバッグ用基布の厚さについては０．３５ｍｍ以下であることが収納コンパクト性の面から好ましく、剛軟度についてはタテ方向およびヨコ方向ともに１００ｍｍ以下であることが収納コンパクト性の面から好ましい。また、エアバッグ用基布の引張強力が４００Ｎ／ｃｍ以上、破断伸度が１５％以上、引裂強力が８０Ｎ以上であることがエアバッグとしての機械的特性、つまり破裂防止の点から好ましい。
【００２４】
また、本発明のエアバッグ用基布はエアバッグが展開した時にかかる高温ガスが基布に与える熱的損傷などを想定して、ＦＭＶＳＳ３０２に基づいて測定した難燃性が１００ｍｍ／ｍｉｎ未満であることが好ましい。８０ｍｍ／ｍｉｎ未満であればさらに好ましい。
【００２５】
本発明のエアバッグ用基布は、運転席用エアバッグ、助手席用エアバッグ、後部座席用エアバッグ、側面用エアバッグ、カーテン用エアバッグ、ニーエアバッグなどに使用することができ、追突保護用のヘッドバッグ、幼児保護用ミニバッグ、脚部保護用バッグ、シートベルト用バッグなど機能的に適用し得る部位にも適用することもでき、形状、容量などは要望される要件を満足するようにすればよい。
【００２６】
また、本発明のエアバッグ用基布は、合成繊維からなる織物に、合成樹脂をナイフコーターにより、ナイフと該織物との接圧を１〜１５Ｎ／ｃｍの範囲内で、かつ、基布張力が５００〜３，０００Ｎ／ｍの範囲内で塗工することにより製造することができる。ナイフコーターで塗工すると、合成樹脂の付着量の制御、付着量の安定性が良好となる。塗工時にナイフと織物との接圧を１〜１５Ｎ／ｃｍの範囲内で行うが、１Ｎ／ｃｍより小さいと樹脂量が多く塗工され基布重量が大きく、収納コンパクト性に劣る。また、１５Ｎ／ｃｍより大きいと織物を構成するマルチフィラメントがナイフで削られて単糸切れをおこす原因となり、品位が劣るばかりか、織物表面を樹脂膜で覆うことができなくなり、低通気性の面で良くない。また、基布張力を５００〜３，０００Ｎ／ｍの範囲内で塗工することが、塗工時に一時的に織物の耳たぶりを改善し、塗工幅を制御できる点で極めて重要である。基布張力が５００Ｎ／ｍより小さいと織物の耳たぶりが改善されず、塗工幅を十分に確保することができない。また、３，０００Ｎ／ｍより大きいと織物の幅方向に均一な張力がかからない場合があるばかりか、バッグ作製時の収縮により寸法安定性が劣り良くない。ナイフコーターで塗工する場合の樹脂粘度は５〜２０Ｐａ・ｓの範囲内にあることが好ましい。５Ｐａ・ｓ未満であると粘度が低すぎて、基布内部に樹脂が浸透し低通気性に劣るばかりか、低通気性を達成するためには塗工量が多くなり、収納性の面で良くない。また、２０Ｐａ・ｓより大きくなると粘度が高すぎて、樹脂の塗工量を少なくする（薄く均一に塗工する）ことが困難となり、収納性の面で良くないし、コストもかかる。
【００２７】
また、ナイフコーティング法には、ナイフオーバーロール法、ナイフオーバーベルト法、フローティングナイフ法があるが、低塗工量化が可能であるという点からフローティングナイフ法が好ましく用いられる。
【００２８】
また、塗工前の精練セット加工は、基布の耳たぶりを軽減させ、塗工をより円滑に行うために実施されるが、本発明においては、基布張力を５００〜１，５００という高張力で樹脂を塗工するので、耳たぶりを軽減しながら塗工ができる。したがって、精練セット加工を施さず生機あるいは生機セットである織物を用いることが、コストダウンの面から好ましい。
【００２９】
【実施例】
次に実施例により、本発明をさらに詳しく説明する。なお、実施例中における各種評価は、下記の方法で測定した。
【００３０】
目付（樹脂付着量）：ＪＩＳ Ｌ１０９６（８．４．２法）により求めた。
【００３１】
厚み：ＪＩＳ Ｌ１０９６に基づき測定した。なお、基布の中央部の測定値は基布を幅方向に３分割し、その３分割された真ん中の基布における真ん中から１ｃｍ間隔の厚み５点を測定し、その平均値より求めた。また、塗工端部の測定値は塗工された端から基布の内側へ１ｃｍ間隔で３点ずつで両端６点の平均値より求めた。
【００３２】
引張強力：ＪＩＳ Ｌ１０９６（８．１２．１Ａ法）に基づき、織物幅は３ｃｍ、引張つかみ間隔１５ｃｍ、引張速度２００ｍｍ／ｍｉｎで引っ張った時の破断強力を測定した。
【００３３】
破断伸度：ＪＩＳ Ｌ１０９６（８．１２．１Ａ法）に基づき、織物幅は３ｃｍ、引張つかみ間隔１５ｃｍ、引張速度２００ｍｍ／ｍｉｎで引っ張った時の破断伸度を測定した。
【００３４】
引裂強力：ＪＩＳ Ｌ１０９６（８．１５．２Ａ−２法）に基づき、引張速度２００ｍｍ／ｍｉｎで引っ張ったときの引裂強力を求めた。
【００３５】
剛軟度：ＪＩＳ Ｌ１０９６（８．１９．１Ａ法）により求めた。
【００３６】
通気度：ＪＩＳ Ｌ１０９６ (８．２７．１Ａ法）により求めた。
【００３７】
難燃性：ＦＭＶＳＳ３０２により求めた。
実施例１、比較例１
単糸断面のアスペクト比が１．０であるナイロン６６繊維であって、総繊度が４７０デシテックスで７２フィラメントの、強度８．５ｃＮ／デシテックス、伸度２１％、無撚りの糸を使用してウオータージェットルームでタテ糸とヨコ糸の密度がそれぞれ５５本／２．５４ｃｍの平織物を製織し、１９０℃で１分間ヒートセットした。該ヒートセット後の織物を、粘度が１５Ｐａ・ｓの無溶剤系メチルビニルシリコーン樹脂液を用いて次の方法でコーティングした。
（実施例１）せき板ナイフを用いたフローティングナイフコーターにて、ナイフと織物との接圧を１０Ｎ／ｃｍ、基布張力を２６２０Ｎ／ｍに調整しコーティングを行った後、１９０℃で２分間加硫処理を行い、基布幅が１５２ｃｍのエアバッグ用基布を得た。
（比較例１）ナイフと織物との接圧を０．６Ｎ／ｃｍとした以外は、実施例１と同様に処理し、基布幅が１５２ｃｍのエアバッグ用基布を得た。
【００３８】
このようにして得られたエアバッグ用基布の特性を表１に示した。実施例１のエアバッグ用基布は、基布幅が１５２ｃｍ、塗工幅が１４８ｃｍ（Ｃ／Ｗ＝０．９７）であり、かつ基布の中央部の厚みＴ１と塗工端部との厚みＴ２との関係がＴ１／Ｔ２＝０．９７であったが、比較例１のエアバッグ用基布は、接圧が小さいため、塗工幅が１３９ｃｍとなり（Ｃ／Ｗ＝０．９１）、十分な塗工幅を確保できなかった。実施例１によるものは、十分な塗工幅を確保した経済性に優れたエアバッグ用基布であることがわかる。
【００３９】
比較例２
単糸断面のアスペクト比が３．２であるナイロン６６繊維であって、総繊度が３５０デシテックスで９６フィラメントの強度８．０ｃＮ／デシテックス、伸度２４％、無撚りの糸を使用してウオータージェットルームでタテ糸とヨコ糸の密度がそれぞれ６１本／２．５４ｃｍの平織物を製織し、１９０℃で１分間ヒートセットした。ヒートセット後の織物を、粘度が１６Ｐａ・ｓの無溶剤系メチルビニルシリコーン樹脂液を用いて次の方法でコーティングした。
せき板ナイフを用いたフローティングナイフコーターにて、ナイフと織物との接圧を１２Ｎ／ｃｍ、基布張力を３２００Ｎ／ｍになるようにコーティングを行った後、１９０℃で２分間加硫処理を行い、エアバッグ用基布を得た。
【００４０】
このようにして得られたエアバッグ用基布の特性を表１に示した。比較例２のエアバッグ用基布は、塗工時の基布張力が非常に大きいため、基布の幅方向において均一な張力がかからず、塗工幅が十分確保できなかった。
【００４１】
【表１】
【発明の効果】
本発明によれば、エアバッグとしての機械的特性、空気遮断性、収納コンパクト性を兼ね備え、かつ、裁断時のロスが少なく、コストパフォーマンスに優れたエアバッグ用基布を提供するものことができ、エアバッグ乗員保護システムを普及推進させることができる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a base fabric for an air bag in which a resin is laminated, and more particularly, to improve the thickness difference of a base fabric in which a resin is laminated on a woven fabric, and by earring at the ear end portion of the woven fabric. The present invention relates to an air bag base fabric, an air bag, and a method of manufacturing the same, which are improved in reduction in coating width.
[0002]
[Prior art]
Conventionally, for the purpose of imparting functions such as heat resistance, flame retardancy, and air barrier property to airbags, chloroprene, woven fabric made of filament yarn such as nylon 66, nylon 6 or polyester of 100 to 900 dtex, silicone, applying the synthetic resins such as urethane is generally performed. In general, a knife coater or a comma coater is used for the application of such a synthetic resin, and the amount of the resin is uniformly applied for the purpose of maintaining the function of the airbag and reducing the storage compactness and cost. It is requested. However, under the present circumstances, there is a problem of the ear-throwing that occurs at the time of weaving in a high-density fabric having a cover factor in the range of 1,400 to 2,300 such as an airbag base fabric. As a result, the end of the fabric is wrinkled and the resin cannot be applied, and the fabric width that can actually be used as an airbag is about 90% of the weaving width, resulting in loss of the fabric.
[0003]
Therefore, in recent years, in order to solve such problems, the ear knitting which is characterized by the fact that the weaving density at the edge of the ear is higher than the base fabric of the other main body and the increased yarn is driven into the edge of the ear is improved. However, this method is not sufficient (see, for example, Patent Documents 1 and 2). Further, although a method has been disclosed in which two ear yarns are entangled with two yarns that are thinner than the ground yarn different from the Leno tissue in the ear portion and alternately inserted with the two yarns as a unit of yarn (for example, Patent Document 3). See)), and the process is increased and the cost is increased. Economic demands such as cost reduction for airbags that are safety parts are also increasing, and there is an urgent need for an airbag that is low in manufacturing loss and excellent in economic efficiency.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 9-302549
[Patent Document 2]
JP-A-9-302550 [0006]
[Patent Document 3]
JP 2002-212856 A
[Problems to be solved by the invention]
In view of the shortcomings of such conventional airbags, the present invention combines the mechanical characteristics of an airbag, air barrier properties, and storage compactness, has a low loss during cutting, and has excellent cost performance. Provide a cloth.
[0008]
[Means for Solving the Problems]
The present invention employs the following means in order to solve such problems. That is,
(1) synthetic fiber Ri Do from fineness of yarn is more than 350 dtex, the Ru textile der cover factor 2165 or more, the floating knife coater synthetic resin in the range viscosity of 5~20Pa · s, knife and said A base fabric for an air bag obtained by applying a contact pressure with a woven fabric within a range of 1 to 15 N / cm and a base fabric tension within a range of 500 to 3,000 N / m, The relationship between the thickness T1 of the center portion of the base fabric and the thickness T2 of the coating end portion is 0.95 ≦ T1 / T2 ≦ 1 , and the base fabric width W of the base fabric and the resin were applied. A base fabric for an air bag, wherein the relationship with the coating width C is in the range of 0.95 ≦ C / W ≦ 0.99.
here,
T1: Average thickness of 5 points at 1 cm intervals from the middle of the base fabric T2: Average thickness of 6 points at both ends at 1 cm intervals from the coated edge to the inside of the base fabric T1 / T2: T1 Value divided by T2 W: Base fabric width of the base fabric C: Coating width in which resin is applied to the base fabric (base fabric width that can be effectively used for an airbag as a coating base fabric)
C / W: Value obtained by dividing C by W. (2) The airbag fabric according to (1), wherein the synthetic resin is applied without scouring the fabric.
(3) The air bag according to claim (1) or (2), wherein the air permeability measured by the method defined in JIS L1096 A method is 0.01 cc / cm 2 / sec or less. Base fabric.
(4) the adhesion amount of the synthetic resin is characterized in that it is a 5 to 30 g / m 2, claim (1) to (3) base fabric for an air bag according to any one of.
(5) An airbag comprising the airbag fabric according to any one of claims 1 to 4.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The present invention is an airbag base fabric in which a synthetic resin is laminated on at least one side of a woven fabric made of synthetic fibers, and the relationship between the thickness T1 of the center portion of the base fabric and the thickness T2 of the coating end portion is as follows. 0.9 ≦ T1 / T2, and the relationship between the base fabric width W of the base fabric and the coating width C applied with the resin is within the range of 0.95 ≦ C / W ≦ 0.99. It is based on a certain thing, and it has achieved by realizing the mechanical characteristics as an airbag, air barrier property, storage compactness, and also having a very high cost performance with little loss during cutting. It is. Here, the coating width means a base cloth width that can be effectively used for an airbag as a coating base cloth.
[0010]
Examples of the woven fabric made of synthetic fibers constituting the present invention include nylon 6,6, nylon 6, nylon 12, nylon 4,6, a copolymer of nylon 6 and nylon 6,6, nylon 6 with polyalkylene glycol, dicarboxylic acid Polyamide fiber made of a copolymer obtained by copolymerizing acid, amine, etc., polyester fiber such as polyethylene terephthalate, polybutylene terephthalate, etc., isophthalic acid, 5-sodium sulfoisophthalic acid or adipic acid as an acid component constituting the repeating unit of polyester Polyester fibers made from copolymers of aliphatic dicarboxylic acids such as aramid fibers, aramid fibers typified by copolymers with paraphenylene terephthalamide and aromatic ether, rayon fibers, sulfone fibers, ultrahigh molecular weight Polyethylene fiber and top Fabric composed of synthetic fibers from a polymer array fiber having a sea-island structure mainly is used. Among these woven fabrics, woven fabrics made of polyamide fibers and polyethylene terephthalate fibers are preferable, and nylon 66 fibers and nylon 6 fibers are more preferable from the viewpoint of impact resistance.
[0011]
Such fibers may contain various additives used for improving the productivity or properties in the production process and processing process of the raw yarn. For example, a heat stabilizer, antioxidant, light stabilizer, smoothing agent, antistatic agent, plasticizer, thickener, pigment, flame retardant and the like can be included.
[0012]
The fineness of the woven yarn constituting the woven fabric is preferably in the range of 90 to 600 dtex, more preferably in the range of 150 to 470 dtex, from the balance of mechanical strength, thickness, and weight. That is, if it is less than 90 dtex, it is preferable from the viewpoint of thickness and weight, but the mechanical strength is insufficient, and if it exceeds 600 dtex, the thickness and weight increase and the storage property is inferior.
[0013]
The single fiber fineness of the fibers constituting the woven yarn is preferably in the range of 1 to 6.5 dtex, more preferably in the range of 2 to 4.5 dtex, so that the storage property and the adhesiveness to the resin are good. Good in terms. If it is less than 1 decitex, there is a problem that the productivity of the yarn tends to deteriorate. If it exceeds 6.5 decitex, the fabric becomes thick, and when the airbag fabric is folded, the fabric is strongly repelled. Inferior.
[0014]
Moreover, the single yarn cross-sectional shape of the woven yarn is not limited to a circle, and may be any shape. For example, a left-right asymmetric type such as a flat shape, a rectangular shape, a rhombus shape, and a saddle shape, a left-right asymmetric type, or a combination type thereof may be used. Furthermore, there may be protrusions, irregularities, and hollow fibers. It is particularly preferable to use a flat cross-sectional yarn having a ratio of the major axis to the minor axis of the cross section, that is, an aspect ratio of 1.8 to 6, since the thickness of the base fabric can be reduced and the storage property is improved. In addition, the use of flat cross-section yarns can reduce the unevenness of the fabric surface, and can reduce the gaps between the yarns that make up the fabric. It is preferable in terms of storage property and cost.
[0015]
Further, it is preferable that the woven yarn is untwisted in terms of low coating. When twisted, the multifilament converges, increasing the unevenness of the fabric surface, requiring more resin to fill the unevenness of the fabric surface with resin, increasing the weight of the base fabric and improving the storage capacity. Not only does it worsen, but the amount of resin increases and costs increase.
[0016]
The loom for weaving the fabric constituting the base fabric of the present invention may be appropriately selected from various looms used for weaving industrial fabrics. For example, a shuttle loom, a water jet loom (WJL), an air jet loom ( AJL), rapier loom, etc. Among them, a water jet loom (WJL) is preferably used from the viewpoint of reducing the residual oil agent of the base fabric that may affect the flame retardancy of the airbag and the productivity.
[0017]
As the woven fabric constituting the present invention, a plain structure, a twill structure, a satin structure, a deformed structure thereof, and the like can be used, but the invention is not particularly limited thereto. Among these woven structures, a plain structure is preferably used from the viewpoint of the cost of the woven fabric and the isotropic development of the airbag. Such a woven fabric does not necessarily have a symmetrical structure, and may have an asymmetrical structure. Examples of the asymmetric texture here include, for example, a plain-textured fabric with different numbers of warp and weft yarns, one with different warp and weft yarn types, and one with warp and weft with a ripstop or empty weave It is possible to use ones with different organizations such as
[0018]
The synthetic resin laminated on the fabric constituting the present invention is one kind of synthetic resin such as polyurethane, polyester, polyamide, acrylic, silicone, fluorine, polyethylene, styrene butadiene, and nitrile butadiene. Although the above can be used, it is not limited to these. In addition, as the synthetic resin, any of solvent-based, water-based, and water-dispersed resins can be used as appropriate. Of these, silicone resins are preferably used from the viewpoint of heat resistance.
[0019]
The adhesion amount of the synthetic resin in the present invention is preferably in the range of 5 to 30 g / m 2 , more preferably in the range of 8 to 20 g / m 2 . Furthermore, it is good in terms of storage.
[0020]
In the present invention, the relationship between the thickness T1 of the central portion of the airbag fabric and the thickness T2 of the coating end portion is 0.9 ≦ T1 / T2, more preferably 0.95 ≦ T1 / T2. When T1 / T2 is smaller than 0.9, the variation in the thickness of the bag after cutting and sewing increases, so that when the bag is unfolded, it is not unfolded isotropically, and high-speed unfolding performance that catches the passengers faster Is inferior. Moreover, since the high temperature gas at the time of deployment is unevenly applied to the bag, the bag may be greatly damaged by heat.
[0021]
In the airbag fabric according to the present invention, the relationship between the fabric width W of the fabric and the coating width C applied with the resin is preferably 0.95 ≦ C / W ≦ 0.99. If it is less than 0.95, the loss at the time of bag cutting is large and the cost performance is inferior. When it becomes larger than 0.99, the part that grips both ends of the base fabric by the heat setting after resin coating becomes the resin coating part, which causes wrinkles and is inferior in quality.
[0022]
The air permeability of the airbag base fabric of the present invention is preferably 0.01 cc / cm 2 / sec or less. By adjusting to such an air permeability, the airbag design range of various parts is widened, and it can be preferably used for applications requiring extremely low air permeability, such as inflatable curtains, knee airbags, and smart bags.
[0023]
The thickness of the airbag fabric of the present invention is preferably 0.35 mm or less from the viewpoint of storage compactness, and the bending resistance is 100 mm or less in both the vertical and horizontal directions. From the viewpoint of sex. The tensile strength of the airbag base fabric is preferably 400 N / cm or more, the elongation at break is 15% or more, and the tear strength is 80 N or more from the viewpoint of mechanical characteristics as an airbag, that is, from the viewpoint of preventing bursting.
[0024]
In addition, the base fabric for airbags of the present invention has a flame retardancy measured based on FMVSS302 of less than 100 mm / min, assuming thermal damage to the base fabric caused by the high-temperature gas applied when the airbag is deployed. It is preferable. More preferably, it is less than 80 mm / min.
[0025]
The airbag fabric of the present invention can be used for a driver airbag, a passenger airbag, a rear seat airbag, a side airbag, a curtain airbag, a knee airbag, and the like. It can also be applied to functionally applicable parts such as protective head bags, infant protection mini bags, leg protection bags, seat belt bags, etc., and the shape, capacity, etc. satisfy the required requirements What should I do?
[0026]
The airbag fabric of the present invention is a fabric made of synthetic fibers, a synthetic resin is applied to the fabric by means of a knife coater, the contact pressure between the knife and the fabric is in the range of 1 to 15 N / cm, and the fabric tension Can be produced by coating within a range of 500 to 3,000 N / m. When applied with a knife coater, the amount of synthetic resin deposited and the stability of the amount deposited are improved. The contact pressure between the knife and the fabric is applied within a range of 1 to 15 N / cm at the time of coating, but if it is less than 1 N / cm, the amount of resin is applied and the weight of the base fabric is large, resulting in poor storage compactness. On the other hand, if it is greater than 15 N / cm, the multifilament constituting the woven fabric may be cut with a knife and cause a single yarn breakage. Not good in terms. In addition, it is extremely important that the base fabric tension is applied within the range of 500 to 3,000 N / m in that it can temporarily improve the earring of the fabric and can control the coating width at the time of coating. If the base fabric tension is less than 500 N / m, the earring of the fabric is not improved, and the coating width cannot be secured sufficiently. On the other hand, if it is greater than 3,000 N / m, there is a case where a uniform tension is not applied in the width direction of the woven fabric, and the dimensional stability is not inferior due to shrinkage at the time of bag production. The resin viscosity when coating with a knife coater is preferably in the range of 5 to 20 Pa · s. If it is less than 5 Pa · s, the viscosity is too low, the resin penetrates into the base fabric and the air permeability is inferior, and in order to achieve low air permeability, the coating amount is increased, and in terms of storage properties Not good. On the other hand, if the viscosity exceeds 20 Pa · s, the viscosity is too high, and it becomes difficult to reduce the amount of resin applied (thin and uniformly applied), which is not good in terms of storage properties and costs.
[0027]
The knife coating method includes a knife over roll method, a knife over belt method, and a floating knife method, but the floating knife method is preferably used from the viewpoint that the coating amount can be reduced.
[0028]
Further, the scouring set process before coating is carried out in order to reduce the ear fogging of the base fabric and perform the coating more smoothly. In the present invention, the base fabric tension is as high as 500 to 1,500. Since the resin is applied with tension, it can be applied while reducing the earrings. Therefore, it is preferable from the viewpoint of cost reduction to use a raw machine or a woven fabric that is a raw machine set without performing scouring set processing.
[0029]
【Example】
Next, the present invention will be described in more detail with reference to examples. Various evaluations in the examples were measured by the following methods.
[0030]
Fabric weight (resin adhesion amount): Determined according to JIS L1096 (method 8.4.2).
[0031]
Thickness: measured based on JIS L1096. In addition, the measured value of the center part of the base fabric was obtained by dividing the base fabric into three in the width direction, measuring five points with a thickness of 1 cm from the center of the middle base fabric divided into three, and calculating the average value. Moreover, the measured value of the coating edge part was calculated | required from the average value of 6 points | pieces at 3 points | pieces at a 1 cm space | interval from the coated edge | side to the inner side of a base fabric.
[0032]
Tensile strength: Based on JIS L1096 (8.12.1A method), the breaking strength was measured when the fabric width was 3 cm, the tension gripping interval was 15 cm, and the tensile speed was 200 mm / min.
[0033]
Breaking elongation: Based on JIS L1096 (8.12.1A method), the breaking elongation was measured when the fabric width was 3 cm, the tension gripping interval was 15 cm, and the tensile speed was 200 mm / min.
[0034]
Tear strength: Based on JIS L1096 (8.15.2A-2 method), the tear strength when pulled at a pulling speed of 200 mm / min was determined.
[0035]
Bending softness: determined according to JIS L1096 (8.19.1 A method).
[0036]
Air permeability: Determined according to JIS L1096 (8.27.1A method).
[0037]
Flame retardancy: determined by FMVSS302.
Example 1 and Comparative Example 1
Water using nylon 66 fiber with a single yarn cross-sectional aspect ratio of 1.0, a total fineness of 470 dtex and 72 filaments, strength 8.5 cN / dtex, elongation 21%, untwisted yarn A plain woven fabric having a warp and weft density of 55 yarns / 2.54 cm each was woven in a jet loom and heat set at 190 ° C. for 1 minute. The fabric after heat setting was coated by the following method using a solvent-free methyl vinyl silicone resin solution having a viscosity of 15 Pa · s.
(Example 1) After coating with a floating knife coater using a cutting knife, the contact pressure between the knife and the fabric was adjusted to 10 N / cm 2 and the base fabric tension was adjusted to 2620 N / m. A vulcanization treatment was performed for a minute to obtain an airbag base fabric having a base fabric width of 152 cm.
(Comparative Example 1) A base fabric for an airbag having a base fabric width of 152 cm was obtained in the same manner as in Example 1 except that the contact pressure between the knife and the fabric was 0.6 N / cm .
[0038]
The characteristics of the airbag fabric thus obtained are shown in Table 1. The base fabric for airbag of Example 1 has a base fabric width of 152 cm, a coating width of 148 cm (C / W = 0.97), and a thickness T1 of the center portion of the base fabric and the coating end portion. Although the relationship with the thickness T2 was T1 / T2 = 0.97, since the airbag base fabric of Comparative Example 1 had a small contact pressure, the coating width was 139 cm (C / W = 0.91). A sufficient coating width could not be secured . It turns out that what is based on Example 1 is the base fabric for airbags excellent in the economical efficiency which ensured sufficient coating width.
[0039]
Comparative Example 2
Water jet using nylon 66 fiber with a single yarn cross-section aspect ratio of 3.2, total fineness 350 dtex, 96 filament strength 8.0 cN / dtex, elongation 24%, untwisted yarn In the room, a plain fabric having a warp and weft yarn density of 61 yarns / 2.54 cm each was woven and heat set at 190 ° C. for 1 minute. The fabric after heat setting was coated by the following method using a solvent-free methyl vinyl silicone resin liquid having a viscosity of 16 Pa · s.
Using a floating knife coater with a sword knives, coating was performed so that the contact pressure between the knife and the fabric was 12 N / cm and the base fabric tension was 3200 N / m, and then vulcanized at 190 ° C. for 2 minutes. And a base fabric for an airbag was obtained.
[0040]
The characteristics of the airbag fabric thus obtained are shown in Table 1. The base fabric for airbags of Comparative Example 2 had a very large base fabric tension at the time of coating, so that a uniform tension was not applied in the width direction of the base fabric, and the coating width could not be secured sufficiently.
[0041]
[Table 1]
【The invention's effect】
According to the present invention, it is possible to provide an airbag base fabric that has mechanical characteristics as an airbag, an air barrier property, and a storage compactness, and has a low loss during cutting and excellent cost performance. The airbag occupant protection system can be promoted.
Claims (5)
ここに、
Ｔ１：基布の真ん中から１ｃｍ間隔の５点の厚みの平均値
Ｔ２：塗工された端から基布の内側へ１ｃｍ間隔３点ずつで両端６点の厚みの平均値Ｔ１／Ｔ２：Ｔ１をＴ２で割った値
Ｗ：基布の基布幅
Ｃ：基布において樹脂が塗工された塗工幅（コーティング基布としてエアバッグに有効に活用できる基布幅）
Ｃ／Ｗ：ＣをＷで割った値 Ri Do synthetic fibers, the fineness of the yarn is more than 350 dtex, the fabric cover factor Ru der than 2165, the viscosity is the floating knife coater synthetic resin in the range of 5~20Pa · s, the knife and said textile A base fabric for an airbag obtained by coating a contact pressure within a range of 1 to 15 N / cm and a base fabric tension within a range of 500 to 3,000 N / m, The relationship between the thickness T1 of the central portion and the thickness T2 of the coating end is 0.95 ≦ T1 / T2 ≦ 1 , and the base fabric width W of the base fabric and the coating width on which the resin is applied A base fabric for an airbag, wherein the relationship with C is in the range of 0.95 ≦ C / W ≦ 0.99.
here,
T1: Average thickness of 5 points at 1 cm intervals from the middle of the base fabric T2: Average thickness of 6 points at both ends at 1 cm intervals from the coated edge to the inside of the base fabric T1 / T2: T1 Value divided by T2 W: Base fabric width of the base fabric C: Coating width in which resin is applied to the base fabric (base fabric width that can be effectively used for an airbag as a coating base fabric)
C / W: Value obtained by dividing C by W
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002376972A JP4423853B2 (en) | 2002-12-26 | 2002-12-26 | Airbag base fabric and airbag |
| KR1020057005833A KR100680564B1 (en) | 2002-10-04 | 2003-10-03 | Coated base fabric for air bags and air bags |
| TW92127372A TWI241965B (en) | 2002-10-04 | 2003-10-03 | Coated air bag bottom and air bag |
| PCT/JP2003/012707 WO2004031472A1 (en) | 2002-10-04 | 2003-10-03 | Coated base fabric for air bags and air bags |
| CA 2501032 CA2501032C (en) | 2002-10-04 | 2003-10-03 | Coated base fabric for air bags and air bags |
| US10/529,848 US8211813B2 (en) | 2002-10-04 | 2003-10-03 | Coated base fabric for air bags and air bags |
| EP20030751321 EP1548180B1 (en) | 2002-10-04 | 2003-10-03 | Coated base fabric for air bags and air bags |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002376972A JP4423853B2 (en) | 2002-12-26 | 2002-12-26 | Airbag base fabric and airbag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2004204404A JP2004204404A (en) | 2004-07-22 |
| JP4423853B2 true JP4423853B2 (en) | 2010-03-03 |
Family
ID=32814286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002376972A Expired - Lifetime JP4423853B2 (en) | 2002-10-04 | 2002-12-26 | Airbag base fabric and airbag |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4423853B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10940825B2 (en) | 2016-03-16 | 2021-03-09 | Toyobo Co., Ltd. | Coated base fabric for airbag and method for manufacturing same |
| US11060239B2 (en) | 2015-12-16 | 2021-07-13 | Toyobo Co., Ltd. | Coated base fabric for airbag and method for manufacturing same |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4501624B2 (en) * | 2004-09-30 | 2010-07-14 | 東レ株式会社 | Airbelt base fabric and manufacturing method thereof |
| JP5241165B2 (en) * | 2007-08-01 | 2013-07-17 | 旭化成せんい株式会社 | Manufacturing method for air bag base fabric |
| JP6105192B2 (en) * | 2011-02-01 | 2017-03-29 | 旭化成株式会社 | Airbag fabric |
| EP2692920A4 (en) * | 2011-03-31 | 2014-12-10 | Kolon Inc | Two-layer fabric which can be inflated with air, and method for producing same |
| PL2883986T3 (en) * | 2012-09-27 | 2017-01-31 | Toray Industries, Inc. | Woven fabric and process for producing same |
| ES2721443T3 (en) * | 2014-03-31 | 2019-07-31 | Toyo Boseki | Coated airbag fabric |
| JP6922698B2 (en) * | 2017-03-31 | 2021-08-18 | 豊田合成株式会社 | Heat-resistant reinforcing cloth for airbags |
| WO2019017273A1 (en) | 2017-07-19 | 2019-01-24 | 帝人フロンティア株式会社 | Woven fabric for airbags |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09302549A (en) * | 1996-05-15 | 1997-11-25 | Toray Ind Inc | Base fabric for air bag and air bag |
| JP3514035B2 (en) * | 1996-05-15 | 2004-03-31 | 東レ株式会社 | Base fabric for airbag and airbag |
| JP3724100B2 (en) * | 1997-02-25 | 2005-12-07 | 東レ株式会社 | Airbag base fabric and airbag |
| JPH1148893A (en) * | 1997-07-31 | 1999-02-23 | Toray Ind Inc | Base cloth for air bag, its manufacture, and air bag |
| JP2000064148A (en) * | 1998-08-10 | 2000-02-29 | Toray Ind Inc | Base fabric for air bag and air bag |
| JP2001288641A (en) * | 2000-03-31 | 2001-10-19 | Toyo Tire & Rubber Co Ltd | Woven fabric for air bag and method for producing the same |
| EP1270800B1 (en) * | 2000-04-07 | 2004-06-30 | Asahi Kasei Kabushiki Kaisha | Coated fabric and air bag |
| JP3745627B2 (en) * | 2001-01-16 | 2006-02-15 | 東洋紡績株式会社 | High density fabric |
| JP4496451B2 (en) * | 2001-01-16 | 2010-07-07 | 東洋紡績株式会社 | Weaving method of high density fabric |
| KR100497927B1 (en) * | 2001-02-01 | 2005-07-01 | 아사히 가세이 가부시키가이샤 | Silicone Coating Cloth and Air Bag |
-
2002
- 2002-12-26 JP JP2002376972A patent/JP4423853B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11060239B2 (en) | 2015-12-16 | 2021-07-13 | Toyobo Co., Ltd. | Coated base fabric for airbag and method for manufacturing same |
| US10940825B2 (en) | 2016-03-16 | 2021-03-09 | Toyobo Co., Ltd. | Coated base fabric for airbag and method for manufacturing same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004204404A (en) | 2004-07-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4378349B2 (en) | High density bag weave base fabric | |
| JP6372081B2 (en) | Coated fabric for airbag, method for producing the same, and airbag | |
| JP5593010B1 (en) | Airbag fabric | |
| JP4419378B2 (en) | Airbag base fabric and manufacturing method thereof | |
| JP4423853B2 (en) | Airbag base fabric and airbag | |
| JP3871103B2 (en) | Airbag base fabric and airbag | |
| EP3418129B1 (en) | Bag body | |
| JP2009035834A (en) | Method for producing base fabric for airbag | |
| JP2853936B2 (en) | Airbag | |
| JP3514035B2 (en) | Base fabric for airbag and airbag | |
| JP2002069790A (en) | Base fabric for air bag and air bag | |
| WO2020174889A1 (en) | Woven fabric for airbag and method for producing woven fabric for airbag | |
| JPH09302549A (en) | Base fabric for air bag and air bag | |
| JPH082359A (en) | Highly slip-off resistant woven fabric for air bag | |
| JP5616162B2 (en) | Airbag fabric | |
| JP3859038B2 (en) | Airbag fabric | |
| JPH08199449A (en) | Fabric base for non-coated air bag and air bag | |
| JPH10236253A (en) | Foundation cloth for air bag and air bag | |
| JP4354771B2 (en) | Airbag woven fabric and curtain airbag | |
| JP2002212856A (en) | High density fabric | |
| JP4553656B2 (en) | Weaving method of high density bag weave base fabric | |
| JP2000064148A (en) | Base fabric for air bag and air bag | |
| JP3830332B2 (en) | Airbag base fabric and airbag | |
| JP4370492B2 (en) | Weaving method of air jet loom | |
| JP4711378B2 (en) | Airbag base fabric and airbag |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20051007 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20071030 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20071226 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20080212 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20080409 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20090317 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20090508 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20090616 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20090807 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20090825 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A821 Effective date: 20090807 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20091023 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20091117 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20091130 |
|
| R151 | Written notification of patent or utility model registration |
Ref document number: 4423853 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R151 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121218 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131218 Year of fee payment: 4 |
|
| EXPY | Cancellation because of completion of term |