JP4190740B2

JP4190740B2 - Bag-woven airbag base fabric and bag-woven airbag

Info

Publication number: JP4190740B2
Application number: JP2001060472A
Authority: JP
Inventors: まり子篠崎; 守北村
Original assignee: Toyobo Co Ltd
Current assignee: Toyobo Co Ltd
Priority date: 2001-03-05
Filing date: 2001-03-05
Publication date: 2008-12-03
Anticipated expiration: 2021-03-05
Also published as: JP2002264751A

Description

【０００１】
【発明の属する技術分野】
本発明は自動車用安全装置の一つであるエアバッグに関するものであり、輸送車両における搭乗者を正面保護または側面保護するために特に有益なエアバッグに関するものである。
【０００２】
【従来の技術】
近年、自動車安全部品の一つとして、エアバッグは乗員の安全意識の向上に伴い、急速に装着率が向上している。エアバッグは自動車の衝突事故の際、衝撃をセンサーが感知し、インフレーターから高温、高圧のガスを発生させ、このガスによってエアバッグを急激に展開させ、乗員保護に役立つものである。
【０００３】
従来、エアバッグには運転席用、助手席用の正面からの衝突時に乗員を保護するものが装着されてきたが、最近では側部からの衝突にも対応できるエアバッグが開発されてきた。
【０００４】
運転席用、助手席用のエアバッグには従来2枚のエアバッグ基布を縫製することによって、作製されている。しかし、最近エアバッグの性能向上および製造コストの削減から製織段階でバッグを形成することが出来る袋織り技術が注目されてきた。
【０００５】
また、側面保護用エアバッグは、自動車のロールオーバーを想定している場合が多く、運転席用、助手席用のエアバッグとは異なり、展開後に内圧保持時間を数秒から10秒程度確保する必要があるとされている。それによって車両がロールオーバー中にも乗員の頭部が保護できるように設計されている。よって、織物本体からのガス漏れを防がなければならず、縫製品では縫い目からの空気漏れがあるため実用的ではない。現状は袋織りエアバッグ基布に表面コーティングしていることが通常である。
【０００６】
【発明が解決しようとする課題】
ところで、運転席用および助手席用袋織りエアバッグの場合、数秒から10秒程度の内圧保持が不必要なため、通常軽量、コンパクト化を目的としてノンコート布が用いられている。そのため、低通気性の高密度織物が必要とされている。また、運転席用および助手席用および側面保護用のどの袋織りエアバッグも、展開した際接結1重部（綴じ部）と袋部の境界部分の目ずれからのエアー漏れやインフレーターからの残さの飛び出しが大きな問題となっており、この問題を解決するため高密度織物が必要とされている。
【０００７】
しかも、現段階においては、側面衝突用袋織りエアバッグ基布の場合、自動車の横転を想定していることが多く、バッグの内圧保持性能を向上させるため、袋織りエアバッグ基布に表面コーティングしたエアバッグを使用している。しかし、現状では自動車の横転に耐えうる内圧保持性能を満たすことが出来ていない。
【０００８】
特開平4−193646号公報において、袋織りエアバッグの接結一重組織を内側、外側の2つにわけ経糸・緯糸の拘束度の異なる織組織を当てはめることを提案しているが、内外における拘束度の差の規定は無く、エアバッグ展開時に求められる内圧保持性能を十分に得られるだけの提案となっていない。
【０００９】
そのため、本発明の袋織りエアバッグ基布は、従来の袋織りエアバッグ基布の問題点、特に内圧保持性能の向上に着目し、袋部−接結1重部の境界部からのエアー漏れに関する問題点を解決する袋織りエアバッグ基布及び袋織りエアバッグを提供することを目的とする。
【００１０】
【課題を解決するための手段】
上記課題を解決するための手段、即ち、本発明の第１は、複数枚の布帛を袋織りにより結合させた袋織りエアバッグ基布であり、袋部（多重布部）と接結1重部A（1重部）との境界部に、該接結1重部Aとは異なる織組織の接結1重部Bを有し、接結1重部Bが、経糸および／又は緯糸を1〜20本有し、挿入した糸と垂直に交わる糸は織密度に合わせて組織変化させ、接結１重部Ｂの織組織の構成が、経糸および／または緯糸が、組織図上、袋部からみて1本毎交互に上下に反転した構成を少なくとも1列以上取ることを特徴とする袋織りエアバッグ基布であり、その第２は、複数枚の布帛を袋織りにより結合させた袋織りエアバッグ基布であり、袋部（多重布部）と接結1重部A（1重部）との境界部に、該接結1重部Aとは異なる織組織の接結1重部Bを有し、接結1重部Bが、経糸および／又は緯糸を1〜20本有し、挿入した糸と垂直に交わる糸は織密度に合わせて組織変化させ、接結１重部Ｂの織組織の構成が、経糸および／または緯糸が、組織図上、接結1重部Aからみて1本毎交互に上下に反転した構成を少なくとも2列以上取ることを特徴とする袋織りエアバッグ基布であり、
【００１１】
その第３は、複数枚の布帛を袋織りにより結合させた袋織りエアバッグであり、袋部（多重布部）と接結1重部A（1重部）との境界部に、該接結1重部Aとは異なる織組織の接結1重部Bを有し、接結1重部Bが、経糸および／又は緯糸を1〜20本有し、挿入した糸と垂直に交わる糸は織密度に合わせて組織変化させ、接結１重部Ｂの織組織の構成が、経糸および／または緯糸が、組織図上、袋部からみて1本毎交互に上下に反転した構成を少なくとも1列以上取ることを特徴とする袋織りエアバッグであり、その第４は、複数枚の布帛を袋織りにより結合させた袋織りエアバッグであり、袋部（多重布部）と接結1重部A（1重部）との境界部に、該接結1重部Aとは異なる織組織の接結1重部Bを有し、接結1重部Bが、経糸および／又は緯糸を1〜20本有し、挿入した糸と垂直に交わる糸は織密度に合わせて組織変化させ、接結１重部Ｂの織組織の構成が、経糸および／または緯糸が、組織図上、接結1重部Aからみて1本毎交互に上下に反転した構成を少なくとも2列以上取ることを特徴とする袋織りエアバッグである。
【００１２】
【発明の実施の形態】
本発明の袋織りエアバッグ基布を構成する原糸は、特に素材を限定するものではないが、特にナイロン66、ナイロン6、ナイロン46、ナイロン12などの脂肪族ポリアミド繊維、アラミド繊維のような芳香族ポリアミド繊維、ポリエチレンテレフタレートやポリブチレンテレフタレートなどのホモポリエステルが使用される。他には全芳香族ポリエステル、超高分子量ポリエチレン繊維、PPS繊維、ポリエーテルケトン繊維などが挙げられる。ただし、経済性を勘案するとポリエステル繊維、ポリアミド繊維（ナイロン66、ナイロン6、ナイロン46）が特に好ましい。
【００１３】
また、これらの合成繊維には原糸製造工程や後加工工程での工程通過性を向上させるために、各種添加剤を含有しても何ら問題はない。例えば、酸化防止剤、熱安定剤、平滑剤、帯電防止剤、増粘剤、難燃剤などである。
【００１４】
また、通気度低下や目ずれ防止のためのコート剤としては特に限定するものではなく、クロロプレン、クロルスルフォン化オレフィン、シリコーンなどの合成ゴムを塗付またはゴム状のものを接着剤を介してラミネートしても良いし、接着剤を介さずそのままラミネートすることも可能である。また、エアバッグとして性能を満たせば、コーティングやラミネートを施さなくてもノンコート基布でよいいし、ノンコート基布に後加工を施してもよい。
【００１５】
また、製織の際使用される織機についても特に限定はなく、例えばウォータージェットルーム、エアジェットルーム、レピアルーム、プロジェクタイルルームなどが使用される。しかし、織生産性、経糸へのダメージ、糸汚れなどを考慮するとウォータージェットルーム、エアジェットルームが特に好ましい。
【００１６】
また、袋織りの柄を決定する際には、ジャカード装置やドビー装置が用いられる。特に複雑な柄出しをするためには、ジャカード装置（電子式、機械式）が必要となり、更に生産性、柄変更の容易さより電子式ジャカード装置が好ましい。
【００１７】
以下、本発明の袋織りエアバッグ基布の好ましい例を添付図面を参照して本発明を詳述する。
【００１８】
図1の例は、今回使用した袋織りエアバッグの模式図である。形状等の因子を省くため、インフレータ取付け口やバッグの複雑な形状は取り入れず簡単化した図面とした。1が袋織り部（多重布部）、2が接結1重部B、3が接結1重部Aである。ここで、1の袋織り組織は今回の例の中では2重織の袋を形成しているため、図2に示す組織図は2重布織の一例であり、実際は、これ以外の袋組織を使用しても構わない。
【００１９】
図2は、袋組織（2重布織）の組織図例である。
【００２０】
図3は、接結1重部A（図1-3）の一例であり、これらの組織以外にも境界部（接結1重部B）に入る組織以外であり、接結1重部を形成できる織構成であればどのような組織であっても構わない。
【００２１】
図1-2の接結1重部Bは袋部との境界部に当たり、境界面からみて垂直方向の糸が、組織図上、袋部の最終目と上下が逆転した組織を交互に入れた構成、すなわち、組織図上で袋組織最終目の上下逆転の組織、その次の列にはその前列の逆転の組織、というように順に境界面と垂直方向の糸が上下に一本ずつ交差することが望ましい。
【００２２】
かつ／もしくは、図1-2の接結1重部Bは袋部との境界部にあたり、境界面からみて垂直方向の糸が、組織図上、接結1重部Aの最終目と上下が逆転した組織を交互に入れた構成、すなわち、組織図上で接結1重部A組織最終目の上下逆転の組織、その次の列にはその前列の逆転の組織、というように順に境界面と垂直方向の糸が上下に一本ずつ交差することが望ましい。
【００２３】
この接結１重部Ｂは、経糸および／又は緯糸を１本〜２０本有する。接結１重部Ｂの経糸および／又は緯糸の本数は、経糸テンションや経糸のつり等を含むバッグの品位を考慮すると、好ましくは１〜１０本であり、より好ましくは１〜５本である。
【００２４】
【実施例】
以下に実施例をあげて、本発明をさらに詳述する。以下に示す実施例及び比較例における評価は、次の方法で行い、表示した。
【００２５】
目開き量：目開き量の測定は、JIS-L1096-6.21.1に準拠して行った。すなわち、袋部（図1−1）と接結1重部A（図1-3）の境界である接結1重部B（図1-2）を含むサンプルを切り出し、引張試験機で次の条件で引張り、その時の目開き量を測定する。
【００２６】
1）接結1重部Bが引張方向に対し直角になるように幅3cm、チャック間長さ15cmに設定できるようにサンプルを切り出し（図1の点線a、b）、接結1重部Bがチャック間長さ方向の中央になるように設定する。
【００２７】
2）引張試験機を用い、引張速度5cm／minで荷重294N時に引張を停止し、その時の織目が最大に開いた箇所の両端の距離をサンプル引張状態のままノギス、メジャーを使用して測定する。
【００２８】
3）経、緯各々5回測定し、合計10回の平均値で目開き量値とする。
【００２９】
通気度：高圧通気度測定器を用い、サンプル布にかかる差圧を50kPaとし、差圧50kPa下でのサンプル布からの流量（単位：l/cm2/min）を計測する。測定面が直径10cmの円であるため、サンプル布は接結1重部Bのある方向を縦とした場合、縦方向15cm、横方向（袋部分のみで）7.5cmに切り出し（図1の点線c、d）、接結1重部Bを中心にして、袋部部分を開き、サンプル布とし測定面に設置する。経、緯各々5回測定し、合計10回の平均値で通気度値とする。
【００３０】
バッグの品位：加工まで仕上がった袋織りエアバッグ基布及び袋織りエアバッグの欠点、経糸のつりを考慮して、評価を、◎：大変良好、○：良好、△：普通、×：悪い、で印付けしている。
【００３１】
【実施例１】
経、緯糸に350dtex/108fのナイロン66フィラメント原糸を用い、エアージェットルームと電子ジャカード装置を用いて平織にて図1-1部を2重袋部で経60本/2.54cm、緯60本/2.54cmになるように袋織りにて製織後、沸水収縮工程を通過させ、引き続き乾燥、セット工程を経て加工反を作成した。この試料の図1−2の境界部には、袋部（二重部）の終り目と上下逆転の組織を1列挿入した。この時の図1-３部の組織図例を図4に示す。
【００３２】
【参考例1】
経、緯糸に350dtex/108fのナイロン66フィラメント原糸を用い、エアージェットルームと電子ジャカード装置を用いて平織にて図1-1部を2重袋部で経60本/2.54cm、緯60本/2.54cmになるように袋織りにて製織後、沸水収縮工程を通過させ、引き続き乾燥、セット工程を経て加工反を作成した。この試料の図1−2の境界部には、接結1重部Aの終り目と上下逆転の組織を1列挿入した。この時の図1-３部の組織図例を図5に示す。
【００３３】
【実施例2】
経、緯糸に350dtex/108fのナイロン66フィラメント原糸を用い、エアージェットルームと電子ジャカード装置を用いて平織にて図1-1部を2重袋部で経60本/2.54cm、緯60本/2.54cmになるように袋織りにて製織後、沸水収縮工程を通過させ、引き続き乾燥、セット工程を経て加工反を作成した。この試料の図1−2の境界部には、接結1重部Aの終り目と上下逆転の組織を交互に7列挿入した。この時の図1-３部の組織図例を図6に示す。
【００３４】
【実施例3】
経、緯糸に350dtex/108fのナイロン66フィラメント原糸を用い、エアージェットルームと電子ジャカード装置を用いて平織にて図1-1部を2重袋部で経60本/2.54cm、緯60本/2.54cmになるように袋織りにて製織後、沸水収縮工程を通過させ、引き続き乾燥、セット工程を経て加工反を作成した。この試料の図1−2の境界部には、袋部（2重部）の終り目と上下逆転の組織を交互に16列挿入した。この時の図1-３部の組織図例を図7に示す。
【００３５】
【比較例１】
経、緯糸に350dtex/108fのナイロン66フィラメント原糸を用い、エアージェットルームと電子ジャカード装置を用いて平織にて図1-1部を2重袋部で経60本/2.54cm、緯60本/2.54cmになるように袋織りにて製織後、沸水収縮工程を通過させ、引き続き乾燥、セット工程を経て加工反を作成した。この試料には、図1−2の境界部を作成せず、袋部から直接接結1重部A（図1-3）へつながる組織とした。この時の図1-３部の組織図例を図8に示す。
【００３６】
【比較例２】
経、緯糸に350dtex/108fのナイロン66フィラメント原糸を用い、エアージェットルームと電子ジャカード装置を用いて平織にて図1-1部を2重袋部で経60本/2.54cm、緯60本/2.54cmになるように袋織りにて製織後、沸水収縮工程を通過させ、引き続き乾燥、セット工程を経て加工反を作成した。この試料の図1−2の境界部には、袋部（2重部）の終り目と上下逆転の組織を交互に24列挿入した。この時の図1-３部の組織図例を図9に示す。
【００３７】
【比較例３】
経、緯糸に350dtex/108fのナイロン66フィラメント原糸を用い、エアージェットルームと電子ジャカード装置を用いて平織にて図1-1部を2重袋部で経60本/2.54cm、緯60本/2.54cmになるように袋織りにて製織後、沸水収縮工程を通過させ、引き続き乾燥、セット工程を経て加工反を作成した。この試料の図1−2の境界部には、1列の平織組織を挿入した。この時の図1-３部の組織図例を図10に示す。
【００３８】
【比較例４】
経、緯糸に350dtex/108fのナイロン66フィラメント原糸を用い、エアージェットルームと電子ジャカード装置を用いて平織にて図1-1部を2重袋部で経60本/2.54cm、緯60本/2.54cmになるように袋織りにて製織後、沸水収縮工程を通過させ、引き続き乾燥、セット工程を経て加工反を作成した。この試料の図1−2の境界部には、特開平4−193646の実施例1に使用されている2×2のバスケットを1列（糸本数4本）挿入した。この時の図1-３部の組織図例を図11に示す。
【００３９】
【表１】

【００４０】
表1からも明らかなように、実施例1、参考例1、実施例2、3の場合は、目開き量も小さく、かつ通気量も低いことから、エアバッグとして展開した際も、袋部−接結1重部の境界部である接結1重部Bからのエアー漏れ減少につながることがわかる。
【００４１】
また、実施例1、参考例1においては、境界部に入る経糸かつ／もしくは緯糸本数が少ないため、バッグの厚み均一性が得られ、得られるバッグの品位は大変良好である。
【００４２】
実施例2、3の場合、袋部−接結1重部Aの境界部に入る経糸かつ／もしくは緯糸の本数が実施例1、参考例1と比較して多くなるので、バッグの厚みの均一性が多少落ちる。しかし、この境界部によりシワ等の欠点を増やすような悪さはなく、バッグの品位は良好である。
【００４３】
比較例1の場合、境界部が存在しないため、バッグの厚み均一性は得られ、得られるバッグ品位は大変良好であるが、袋部−接結1重部Aが直接つながっているため、その部分の目開き量が大きくなり、よって、通気量も高くなる。そのため、エアバッグとして展開した際に袋部−接結1重部Aとの境目からエアー漏れが激しく起こり、エアバッグとしての性能を発揮できない。
【００４４】
また、比較例2の場合、必要以上に袋部−接結1重部Aとの境界部に経糸かつ／もしくは緯糸が挿入されているため、境界部の目開き量、通気量の値は良いが、バッグの厚み均一性が得られず、厚みムラからシワを発生させる原因となり、得られるバッグの品位が著しく悪くなる。
【００４５】
比較例3の場合、袋部−接結1重部Aの境界部にのみ平織組織を挿入するためその部分の経糸かつ／もしくは緯糸の織縮みが激しくなり、糸のツリが発生し、バッグの品位を悪くする原因となる。また、境界部分で浮糸が発生する場合があり、バッグの品位を落すと共に、その部分で目開きが起り、通気量が高くなるため、バッグとして展開した際に、その部分からエア漏れが発生し、エアバッグとしての性能を十分に発揮できない。
【００４６】
比較例4の場合、特開平4−193646の実施例に記載してある通り、接結1重部Aよりは拘束度の高い組織を接結1重部Bに挿入しているが、この程度の拘束度の差ではバッグが展開した際の目開き量やその部分からのエアー漏れには耐えられないという結果が今回出ている。つまり、この組織は、袋部との境界面に存在する経糸かつ／もしくは緯糸が、組織図上、袋部からみて1本毎交互に上下に反転した構成を少なくとも1列以上取り、かつ／もしくは、袋部との境界面に存在する経糸かつ／もしくは緯糸にが組織図上、接結1重部Aからみて1本毎交互に上下に反転した構成を少なくとも1列以上取るようになっていないため、袋部−接結1重部の境界部で発生する浮糸等の問題点を解決できず、境界部目開き量が大きくなり、最終的に得られるバッグの性能は低いものとなる。
【００４７】
【発明の効果】
本発明の袋織りエアバッグ基布及び袋織りエアバッグは、袋部と接結1重部の境界部に特別な組織帯を挿入することによって、エアバッグ膨張時においても、境界部の目ずれが低減し、インフレーターからのエアー洩れを防ぐことができ、最終的にはエアバッグの内圧保持性能を向上できる。
【図面の簡単な説明】
【図１】実施例、比較例に使用した袋織りエアバッグ基布の１例を示す平面図。
【図２】実施例、比較例に使用した2重袋織部の組織図。
【図３】実施例、比較例に使用した接結1重部Aの組織図。
【図４】実施例1に使用した接結1重部Bの組織図。
【図５】参考例1に使用した接結1重部Bの組織図。
【図６】実施例2に使用した接結1重部Bの組織図。
【図７】実施例3に使用した接結1重部Bの組織図。
【図８】比較例1に使用した接結1重部Bの組織図。
【図９】比較例2に使用した接結1重部Bの組織図。
【図１０】比較例3に使用した接結1重部Bの組織図。
【図１１】比較例4に使用した接結1重部Bの組織図。
【符号の説明】
1：袋部
2：接結1重部B（袋部−接結1重部Aの境界部）
3：接結1重部A
a：目開き量サンプル切り出し例
b：目開き量サンプル切り出し例
c：通気度測定用サンプル切り出し例
d：通気度測定用サンプル切り出し例[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an airbag that is one of safety devices for automobiles, and more particularly to an airbag that is particularly useful for protecting a passenger in a transportation vehicle from the front or side.
[0002]
[Prior art]
In recent years, as one of the safety parts of automobiles, the installation rate of airbags has been rapidly improved with the improvement of passenger safety awareness. In the event of an automobile collision, an air bag detects an impact by a sensor, generates high-temperature and high-pressure gas from an inflator, and rapidly deploys the air bag with this gas to help protect passengers.
[0003]
Conventionally, airbags for driver and passenger seats that protect passengers in the event of a collision from the front have been mounted, but recently, airbags that can cope with a collision from the side have been developed.
[0004]
Conventionally, airbags for driver seats and passenger seats are manufactured by sewing two airbag base fabrics. However, recently, a bag weaving technique that can form a bag at the weaving stage has attracted attention because of the performance improvement of the airbag and the reduction of the manufacturing cost.
[0005]
Side protection airbags are often assumed to be used for automobile rollover, and unlike airbags for driver seats and passenger seats, it is necessary to secure an internal pressure retention time of several seconds to 10 seconds after deployment. It is said that there is. It is designed to protect the occupant's head while the vehicle rolls over. Therefore, it is necessary to prevent gas leakage from the woven fabric body, and in a sewing product, there is air leakage from the seam, which is not practical. At present, the surface coating is usually applied to a bag-woven airbag base fabric.
[0006]
[Problems to be solved by the invention]
By the way, in the case of bag woven airbags for driver seats and passenger seats, it is not necessary to maintain the internal pressure for several seconds to 10 seconds, and therefore uncoated cloth is usually used for the purpose of light weight and compactness. Therefore, there is a need for a low-breathable high-density fabric. In addition, any bag-woven airbag for driver seats, passenger seats, and side protection, when unfolded, air leakage from the misalignment between the connecting single portion (binding portion) and the bag portion, and from the inflator The popping out of the residue is a big problem, and a high density fabric is required to solve this problem.
[0007]
In addition, at the present stage, in the case of side-impact bag woven airbag base fabric, it is often assumed that the car rolls over, and the surface coating is applied to the bag woven airbag base fabric to improve the internal pressure retention performance of the bag. You are using an airbag. However, at present, the internal pressure holding performance that can withstand rollover of an automobile cannot be satisfied.
[0008]
In Japanese Patent Laid-Open No. 4-193646, it has been proposed to apply a woven structure having different degrees of restraint of warp and weft to the inner and outer two parts of the single woven structure of the bag woven airbag. There is no regulation of the difference in degree, and it is not a proposal that can sufficiently obtain the internal pressure holding performance required when the airbag is deployed.
[0009]
Therefore, the bag woven airbag base fabric of the present invention focuses on the problems of the conventional bag woven airbag base fabric, particularly the improvement of the internal pressure holding performance, and air leakage from the boundary portion between the bag portion and the connected single portion. It is an object of the present invention to provide a bag-woven airbag base fabric and a bag-woven airbag that solve the above problems.
[0010]
[Means for Solving the Problems]
Means for solving the above-mentioned problem, that is, a first aspect of the present invention is a bag-woven airbag base fabric in which a plurality of fabrics are joined by bag weaving, and is connected to a bag portion (multiple fabric portion). At the boundary with the part A (single part), there is a connecting single part B of a woven structure different from the connecting single part A, and the connecting single part B is used for warp and / or weft. 1 to 20 yarns that intersect perpendicularly to the inserted yarn are changed in structure in accordance with the weaving density, and the structure of the woven structure of the concatenated single part B is warp and / or weft, A bag-woven airbag base fabric characterized by having at least one row of structures that are alternately inverted one by one when viewed from the section, and the second is a bag in which a plurality of fabrics are joined by bag weaving It is a woven airbag base fabric, and has a single woven structure that is different from the connected single part A at the boundary between the bag part (multiple cloth part) and the single connected part A (single part). Part B The single part B has 1 to 20 warps and / or wefts, and the thread that intersects perpendicularly with the inserted thread is changed in structure according to the weaving density. A warp and / or weft is a bag-woven airbag base fabric characterized in that it takes at least two or more rows of structures that are alternately inverted one by one when viewed from the connected single part A on the structure chart,
[0011]
The third is a bag-woven air bag in which a plurality of fabrics are combined by bag weaving, and the boundary between the bag part (multiple cloth part) and the connecting single part A (single part) Yarn which has a single-part B of woven structure different from the single-part A, and the single-part B has 1 to 20 warps and / or wefts and intersects perpendicularly with the inserted yarn. Changes the structure according to the weaving density, and the structure of the woven structure of the binding single part B has at least a structure in which warps and / or wefts are alternately turned upside down from the bag part on the structure chart. This is a bag-woven airbag characterized by taking one or more rows, and the fourth one is a bag-woven airbag in which a plurality of fabrics are joined by bag weaving, and is connected to the bag portion (multiple fabric portion). At the boundary with the heavy part A (single part), there is a connected single part B of a woven structure different from the connected single part A, and the connected single part B is a warp and / or weft. 1-20 pieces, insert The yarn that intersects the yarn perpendicularly changes its structure according to the weaving density, and the structure of the woven structure of the binding single part B is one warp and / or weft as viewed from the single binding part A on the structure diagram. A bag-woven airbag characterized in that at least two or more rows are alternately inverted up and down.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The raw yarn constituting the bag-woven airbag base fabric of the present invention is not particularly limited in material, but in particular, aliphatic polyamide fibers such as nylon 66, nylon 6, nylon 46, nylon 12, and aramid fibers Homopolyesters such as aromatic polyamide fibers, polyethylene terephthalate and polybutylene terephthalate are used. Other examples include wholly aromatic polyester, ultrahigh molecular weight polyethylene fiber, PPS fiber, and polyetherketone fiber. However, polyester fiber and polyamide fiber (nylon 66, nylon 6, nylon 46) are particularly preferable in consideration of economy.
[0013]
Moreover, in order to improve the process passability in the raw yarn manufacturing process and the post-processing process, these synthetic fibers do not have any problem even if they contain various additives. For example, antioxidants, heat stabilizers, smoothing agents, antistatic agents, thickeners, flame retardants and the like.
[0014]
In addition, the coating agent for preventing a decrease in air permeability and misalignment is not particularly limited, and synthetic rubber such as chloroprene, chlorosulfonated olefin, or silicone is applied or a rubbery material is laminated through an adhesive. Alternatively, it is possible to perform lamination without using an adhesive. In addition, as long as the performance as an airbag is satisfied, a non-coated base fabric may be used without coating or laminating, or post-processing may be performed on the non-coated base fabric.
[0015]
Further, the loom used for weaving is not particularly limited, and for example, a water jet room, an air jet room, a rapier room, a projector room, and the like are used. However, the water jet loom and the air jet loom are particularly preferable in consideration of woven productivity, damage to the warp, yarn stains, and the like.
[0016]
Further, when determining the bag weave pattern, a jacquard device or a dobby device is used. In particular, in order to obtain a complicated pattern, a jacquard device (electronic or mechanical) is required, and an electronic jacquard device is more preferable because of productivity and ease of pattern change.
[0017]
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings as preferred examples of the bag-woven airbag base fabric of the present invention.
[0018]
The example of FIG. 1 is a schematic diagram of the bag-woven airbag used this time. In order to omit factors such as shape, the inflator mounting port and the complicated shape of the bag were not taken in, and the drawing was simplified. 1 is a bag weaving part (multiple cloth part), 2 is a connecting single part B, and 3 is a connecting single part A. Here, since the bag weaving structure of 1 forms a double weaving bag in this example, the organization chart shown in FIG. 2 is an example of a double weaving cloth. May be used.
[0019]
FIG. 2 is an example of a structure diagram of a bag structure (double cloth weave).
[0020]
Fig. 3 is an example of a single-part portion A (Fig. 1-3). In addition to these tissues, other than the tissue that enters the boundary (single-unit part B), Any structure may be used as long as it can be formed.
[0021]
The connecting single part B in Fig. 1-2 hits the boundary part with the bag part, and the vertical thread as viewed from the boundary surface alternately put the structure of the final part of the bag part upside down on the organization chart. In the structure, that is, in the organization chart, the top and bottom inverted structure of the bag tissue at the end, the next row is the inverted structure of the previous row, and so on. It is desirable.
[0022]
And / or the connection single part B in Fig. 1-2 is the boundary part with the bag part, and the vertical thread as viewed from the boundary surface is the top and bottom of the connection single part A on the organization chart. The structure in which the reversed tissues are alternately inserted, that is, the structure of the upside down structure of the connected single part A structure on the organization chart, the next row is the reversed structure of the previous row, and so on. It is desirable that the vertical yarns cross one by one vertically.
[0023]
The single binding portion B has 1 to 20 warps and / or wefts. The number of warps and / or wefts of the single binding portion B is preferably 1 to 10 and more preferably 1 to 5 in consideration of the quality of the bag including warp tension and warp suspension. .
[0024]
【Example】
The following examples further illustrate the present invention. Evaluation in the following examples and comparative examples was performed and displayed by the following method.
[0025]
Opening amount: The opening amount was measured according to JIS-L1096-6.21.1. In other words, a sample including the connection single part B (Figure 1-2), which is the boundary between the bag part (Figure 1-1) and the connection single part A (Figure 1-3), is cut out and then subjected to a tensile tester. Tension under the conditions of, and measure the opening amount at that time.
[0026]
1) Cut out the sample so that the connection single part B can be set to 3 cm wide and 15 cm long between the chucks so that the single connection B is perpendicular to the tensile direction (dotted lines a and b in Fig. 1). Is set to be the center in the length direction between chucks.
[0027]
2) Using a tensile tester, stop the tension when the load is 294N at a tension speed of 5cm / min, and measure the distance between the ends of the part where the texture is maximized using a vernier caliper and measure while the sample is still in tension. To do.
[0028]
3) Measure the warp and latitude 5 times each, and use the average value of 10 times as the opening value.
[0029]
Air permeability: Using a high-pressure air permeability meter, set the differential pressure applied to the sample cloth to 50 kPa, and measure the flow rate (unit: l / cm2 / min) from the sample cloth under a differential pressure of 50 kPa. Since the measurement surface is a circle with a diameter of 10 cm, the sample cloth is cut into 15 cm in the vertical direction and 15 cm in the horizontal direction (only in the bag portion) when the direction with the single connection B is vertical (dotted line in Fig. 1). c, d) Open the bag part around the single binding part B and place it on the measurement surface as a sample cloth. Measure the warp and latitude 5 times each, and use the average value of 10 times as the air permeability value.
[0030]
Quality of the bag: Considering the defects of the bag-woven airbag base fabric and bag-woven airbag that were finished up to processing, and warp suspension, ◎: very good, ○: good, △: normal, ×: bad, It is marked with.
[0031]
[Example 1]
Using warp and weft nylon 66 filament yarn of 350dtex / 108f, using air jet loom and electronic jacquard device in plain weave in Figure 1-1 with double bag part warp 60 / 2.54cm, weft 60 After weaving by bag weaving so that it becomes 2.54 cm / 2.54 cm, it was passed through a boiling water shrinking process, followed by drying and a setting process to create a processed fabric. At the boundary of this sample in FIG. 1-2, one row of the end of the bag (double part) and the inverted structure was inserted. FIG. 4 shows an example of the organization chart of part 1-3 of FIG.
[0032]
[Reference Example 1]
Using warp and weft nylon 66 filament yarn of 350dtex / 108f, using air jet loom and electronic jacquard device in plain weave in Figure 1-1 with double bag part warp 60 / 2.54cm, weft 60 After weaving by bag weaving so that it becomes 2.54 cm / 2.54 cm, it was passed through a boiling water shrinking process, followed by drying and a setting process to create a processed fabric. In the boundary portion of this sample shown in FIG. 1-2, one row of the end of the single binding portion A and the inverted structure was inserted. FIG. 5 shows an example of the organization chart of part 1-3 of FIG.
[0033]
[Example 2]
Using warp and weft nylon 66 filament yarn of 350dtex / 108f, using air jet loom and electronic jacquard device in plain weave in Figure 1-1 with double bag part warp 60 / 2.54cm, weft 60 After weaving by bag weaving so that it becomes 2.54 cm / 2.54 cm, it was passed through a boiling water shrinking process, followed by drying and a setting process to create a processed fabric. Seven rows of the end of the conjugation single part A and the inverted structure were inserted in the boundary part of FIG. 1-2 of this sample. Fig. 6 shows an example of the organization chart in Fig. 1-3.
[0034]
[Example 3]
Using warp and weft nylon 66 filament yarn of 350dtex / 108f, using air jet loom and electronic jacquard device in plain weave in Figure 1-1 with double bag part warp 60 / 2.54cm, weft 60 After weaving by bag weaving so that it becomes 2.54 cm / 2.54 cm, it was passed through a boiling water shrinking process, followed by drying and a setting process to create a processed fabric. Sixteen rows of the end of the bag part (double part) and upside down tissue were inserted into the boundary part of FIG. 1-2 of this sample. FIG. 7 shows an example of the organization chart of part 1-3 of FIG.
[0035]
[Comparative Example 1]
Using warp and weft nylon 66 filament yarn of 350dtex / 108f, using air jet loom and electronic jacquard device in plain weave in Figure 1-1 with double bag part warp 60 / 2.54cm, weft 60 After weaving by bag weaving so that it becomes 2.54 cm / 2.54 cm, it was passed through a boiling water shrinking process, followed by drying and a setting process to create a processed fabric. In this sample, the boundary part of Fig. 1-2 was not created, and the tissue was connected directly from the bag part to the single connected part A (Figure 1-3). FIG. 8 shows an example of the organization chart of part 1-3 of FIG.
[0036]
[Comparative Example 2]
Using warp and weft nylon 66 filament yarn of 350dtex / 108f, using air jet loom and electronic jacquard device in plain weave in Figure 1-1 with double bag part warp 60 / 2.54cm, weft 60 After weaving by bag weaving so that it becomes 2.54 cm / 2.54 cm, it was passed through a boiling water shrinking process, followed by drying and a setting process to create a processed fabric. 24 rows of the end of the bag part (double part) and the inverted structure were inserted into the boundary part of FIG. 1-2 of this sample. FIG. 9 shows an example of the organization chart of part 1-3 of FIG.
[0037]
[Comparative Example 3]
Using warp and weft nylon 66 filament yarn of 350dtex / 108f, using air jet loom and electronic jacquard device in plain weave in Figure 1-1 with double bag part warp 60 / 2.54cm, weft 60 After weaving by bag weaving so that it becomes 2.54 cm / 2.54 cm, it was passed through a boiling water shrinking process, followed by drying and a setting process to create a processed fabric. A single row of plain weave texture was inserted into the boundary of FIG. 1-2 of this sample. FIG. 10 shows an example of the organization chart of part 1-3 of FIG.
[0038]
[Comparative Example 4]
Using warp and weft nylon 66 filament yarn of 350dtex / 108f, using air jet loom and electronic jacquard device in plain weave in Figure 1-1 with double bag part warp 60 / 2.54cm, weft 60 After weaving by bag weaving so that it becomes 2.54 cm / 2.54 cm, it was passed through a boiling water shrinking process, followed by drying and a setting process to create a processed fabric. One row (four yarns) of 2 × 2 baskets used in Example 1 of Japanese Patent Laid-Open No. 4-193646 was inserted into the boundary portion of FIG. 1-2 of this sample. FIG. 11 shows an example of the organization chart of part 1-3 of FIG.
[0039]
[Table 1]

[0040]
As is clear from Table 1, in the case of Example 1, Reference Example 1, Example 2 and 3, the amount of opening is small and the amount of ventilation is low, so even when deployed as an airbag, the bag portion -It turns out that it leads to the air leak reduction from the connection single part B which is a boundary part of a connection single part.
[0041]
In Example 1 and Reference Example 1, since the number of warps and / or wefts entering the boundary portion is small, uniform bag thickness can be obtained, and the quality of the obtained bag is very good.
[0042]
In the case of Examples 2 and 3, the number of warps and / or wefts entering the boundary portion between the bag portion and the concatenated single portion A is larger than that in Example 1 and Reference Example 1, so that the bag thickness is uniform. Sexually falls a little. However, there is no badness that increases defects such as wrinkles due to this boundary portion, and the quality of the bag is good.
[0043]
In the case of Comparative Example 1, since there is no boundary part, the thickness uniformity of the bag is obtained, and the resulting bag quality is very good, but the bag part-connected single part A is directly connected, so that The amount of openings in the portion is increased, and thus the amount of ventilation is also increased. For this reason, when deployed as an airbag, air leaks violently from the boundary between the bag portion and the connected single portion A, and the performance as an airbag cannot be exhibited.
[0044]
Further, in the case of Comparative Example 2, since the warp and / or the weft is inserted more than necessary at the boundary portion between the bag portion and the concatenated single portion A, the values of the opening amount and the ventilation amount at the boundary portion are good. However, the thickness uniformity of the bag cannot be obtained, causing wrinkles due to uneven thickness, and the quality of the resulting bag is significantly deteriorated.
[0045]
In the case of Comparative Example 3, since the plain weave structure is inserted only at the boundary between the bag portion and the concatenated single portion A, the warp and / or weft of the portion becomes severely woven and the yarn is distorted. It may cause poor quality. In addition, floating yarn may occur at the boundary part, and the quality of the bag will be reduced, and opening will occur at that part, increasing the air flow rate, so when it is deployed as a bag, air leakage will occur from that part However, the performance as an airbag cannot be fully exhibited.
[0046]
In the case of Comparative Example 4, as described in the examples of JP-A-4-193646, a tissue having a higher degree of restraint than that of the single binding portion A is inserted into the single binding portion B. The difference in the degree of restraint of this time has shown that it cannot withstand the amount of opening when the bag is deployed and the air leakage from that part. In other words, this structure takes at least one or more rows of warp and / or weft yarns present at the interface with the bag portion, each of which is alternately up and down as viewed from the bag portion on the structure diagram, and / or The warp and / or the weft present on the boundary surface with the bag part are not designed to take at least one or more rows of structures that are alternately turned upside down as viewed from the connected single part A on the structure chart. For this reason, problems such as floating yarn generated at the boundary between the bag portion and the connected single portion cannot be solved, the amount of opening at the boundary portion is increased, and the performance of the finally obtained bag is low.
[0047]
【The invention's effect】
The bag-woven airbag base fabric and the bag-woven airbag of the present invention are designed to insert a special tissue band at the boundary portion between the bag portion and the connecting single portion, thereby preventing misalignment of the boundary portion even when the airbag is inflated. As a result, air leakage from the inflator can be prevented, and the internal pressure retention performance of the airbag can be improved.
[Brief description of the drawings]
FIG. 1 is a plan view showing an example of a bag-woven airbag base fabric used in Examples and Comparative Examples.
FIG. 2 is a structural diagram of a double bag weave used in Examples and Comparative Examples.
FIG. 3 is a structural diagram of a single-part connection A used in Examples and Comparative Examples.
FIG. 4 is a structural diagram of a single connecting portion B used in Example 1.
FIG. 5 is a structural diagram of the single bonded portion B used in Reference Example 1.
FIG. 6 is a structural diagram of a single connecting portion B used in Example 2.
FIG. 7 is a structural diagram of the united single part B used in Example 3.
FIG. 8 is a structural diagram of the single bonded portion B used in Comparative Example 1.
FIG. 9 is a structural diagram of the single bonded portion B used in Comparative Example 2.
FIG. 10 is a structural diagram of the single bonded portion B used in Comparative Example 3.
FIG. 11 is a structural diagram of the single bonded portion B used in Comparative Example 4.
[Explanation of symbols]
1: Bag part
2: Single connection part B (boundary part of bag part-single connection part A)
3: Connection single part A
a: Sample of opening amount sample
b: Sample of opening amount sample
c: Sample of air permeability measurement sample
d: Sample of air permeability measurement sample

Claims

A bag-woven airbag base fabric in which a plurality of fabrics are combined by bag weaving, and the connecting single layer is formed at the boundary between the bag part (multiple cloth part) and the connecting single part A (single part). has a stitched singlet part B of different weave from part a, stitched singlet part B has 1-20 present a warp and / or weft constituting the woven tissue stitching singlet part B Is a bag-woven airbag base fabric wherein warp yarns and / or weft yarns take at least one or more rows as viewed from the bag portion in the organization chart.

A bag-woven airbag base fabric in which a plurality of fabrics are combined by bag weaving, and the connecting single layer is formed at the boundary between the bag part (multiple cloth part) and the connecting single part A (single part). has a stitched singlet part B of different weave from part a, stitched singlet part B has 2-20 present the warp and / or weft constituting the woven tissue stitching singlet part B Is a bag-woven airbag base fabric characterized in that at least two rows of warps and / or wefts are alternately turned upside down as viewed from the connected single part A in the structure diagram.

A bag-woven airbag base fabric in which a plurality of fabrics are combined by bag weaving, and the connecting single layer is formed at the boundary between the bag part (multiple cloth part) and the connecting single part A (single part). has a stitched singlet part B of different weave from part a, stitched singlet part B has 1-20 present a warp and / or weft constituting the woven tissue stitching singlet part B Is a bag-woven airbag characterized in that at least one row of warp and / or weft yarns is alternately inverted up and down as viewed from the bag portion on the organization chart.

A bag-woven airbag base fabric in which a plurality of fabrics are combined by bag weaving, and the connecting single layer is formed at the boundary between the bag part (multiple cloth part) and the connecting single part A (single part). has a stitched singlet part B of different weave from part a, stitched singlet part B has 2-20 present the warp and / or weft constituting the woven tissue stitching singlet part B Is a bag-woven airbag characterized in that warp yarns and / or weft yarns take at least two or more rows as viewed from the connected single portion A in the structure diagram.