JP4563611B2 - Method for producing elastic composite yarn - Google Patents
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- JP4563611B2 JP4563611B2 JP2001129708A JP2001129708A JP4563611B2 JP 4563611 B2 JP4563611 B2 JP 4563611B2 JP 2001129708 A JP2001129708 A JP 2001129708A JP 2001129708 A JP2001129708 A JP 2001129708A JP 4563611 B2 JP4563611 B2 JP 4563611B2
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Description
【０００１】
【発明の属する技術分野】
本発明は伸縮性複合糸の製造方法に係り、さらに詳しくは均一な伸長特性を有する伸縮性複合糸を簡便にかつ高速で、しかも安定して製造することができる伸縮性複合糸の製造方法に関する。
【０００２】
【従来の技術】
近年のストレッチ布帛の流行に伴い、弾性繊維を用いた伸縮性複合糸の製造が多く行われている。伸縮性複合糸の製造方法としては、弾性繊維の巻パッケージを回転させて弾性繊維を引き出す方法が主流であり、一般には弾性繊維の周りに非弾性繊維を巻き付ける構造のカバリング機や、弾性繊維と短繊維を撚り合わせながら精紡交撚糸を得る精紡機等を用いて製造される。またこれらの装置には、弾性繊維を伸ばしながら給糸するためのドラフト装置が備えられている。例えば、弾性繊維の巻パッケージを同速度で回転する２本の駆動ローラー間の上に置き、該駆動ローラーの周上の速度を巻き取り側の速度より遅らせることで弾性繊維を緊張させてドラフトをかけて引き出す方式（転がし取りタイプ）、またはクレードルに弾性繊維の巻パッケージを取り付け、回転する駆動ローラーにバネや重り等の力で弾性繊維の巻パッケージを押しつけて接触回転させ、巻パッケージ周上の弾性繊維を引き出し、巻き取り側の速度より弾性繊維の巻パッケージの周速を遅らせることで弾性繊維にドラフトをかける方法などが知られている。
しかし、上記のようなドラフト機構の設置には高額の設備投資が必要となり、また弾性繊維の巻パッケージを高速で回転させると、巻パッケージ自体や駆動ローラーに糸が巻き付き、糸が解舒できなくなるため、巻パッケージの回転速度に限界があり、機械の生産効率が低下する問題がある。
【０００３】
また、特開平１０−１２１３４２号公報には、静置した弾性繊維の巻パッケージから弾性繊維を解舒させて複数のローラー間で一定倍率に伸長する方法が提案されている。しかし、弾性繊維の巻パッケージには、内層ほどその外層側の糸によって締め付けられ、内外層での糸繊度差や、巻パッケージ上下端部と中央部での巻形態による糸繊度差が生じているため、巻パッケージから引き出した弾性繊維をローラーによって終始一定比で伸ばす方式では、巻パッケージ内外層の切り替わり部分で収縮特性に差が生じ、かすり状ヒケや引きつり等の欠点が生じ、布帛の商品品質が低下するという大きな問題があった。
従って、弾性繊維と非弾性繊維との伸縮性複合糸を効率よく生産でき、かつ品質の安定した布帛を提供できる伸縮性複合糸の製造方法が強く望まれていた。
【０００４】
【発明が解決しようとする課題】
本発明の課題は、上記従来技術の問題点を解決し、弾性繊維と非弾性繊維の複合糸を簡便にかつ高速で、しかも安定して生産することができ、かつ品質の安定した布帛を提供できる伸縮性複合糸の製造方法を提供することにある。
【０００５】
【課題を解決するための手段】
本発明者等は、上記課題に鑑み、給糸方法による伸縮性複合糸の特性および伸縮性複合糸を用いた布帛のストレッチ特性について鋭意検討した結果、弾性繊維の入出力時の張力を一定の範囲内に調整して非弾性繊維と複合させることにより、伸縮性複合糸を高速で安定して得ることができ、しかもこの伸縮性複合糸を用いて得られる布帛のストレッチ特性や布帛品質が安定することを見い出し、本発明に到達したものである。
上記課題を達成するために本願で特許請求される発明は以下の通りである。
【０００６】
（１）弾性繊維の巻パッケージから弾性繊維を引き出して給糸装置に供給し、該給糸装置から送り出された弾性繊維を非弾性繊維と複合して伸縮性複合糸を製造するに際し、前記給糸装置に変速可能な送り出し装置を設置し、該送り出し装置により、前記巻パッケージから引き出して該送り出し装置に供給する弾性繊維の張力（Ｔ1 ）と該送り出し装置から送り出される弾性繊維の張力（Ｔ2 ）との関係が０．０５≦Ｔ1 ／Ｔ2 ≦０．７の関係となるように、前記弾性繊維の張力を調整することを特徴とする伸縮性複合糸の製造方法。
（２）前記弾性繊維と非弾性繊維を引き揃えて空気交絡処理を行った後、複合することを特徴とする（１）記載の伸縮性複合糸の製造方法。
（３）前記非弾性繊維が未延伸糸を延伸仮撚り加工した糸条であることを特徴とする（１）または（２）記載の伸縮性複合糸の製造方法。
（４）（１）〜（３）のいずれかに記載の伸縮性複合糸を施撚することを特徴とする伸縮性複合糸の製造方法。
【０００７】
【発明の実施の形態】
以下、本発明について詳細に説明する。
本発明の製造方法に用いられる弾性繊維としては、その原料ポリマーや紡糸方法には特に制限はなく、ポリウレタン系、ポリエーテルエステル系等のポリマーが使用可能である。また乾式紡糸、溶融紡糸、湿式紡糸または化学反応等を利用した紡糸方法を採用できるが、破断伸度が４００％〜１０００％のもので伸縮性に優れ、染色加工時のプレセット工程の通常処理温度１９０℃近辺で伸縮性を損なわない弾性繊維であるのが好ましい。
例えば、共重合ポリアルキレンエーテルジオール、主として４，４′ジフェニルメタンジイソシアネートからなる芳香族ジイソシアネートおよび二官能性ジアミンから得られるポリウレタンからなり、ポリウレタンにおけるウレタン部分の数平均分子量が６０００〜９５００、かつウレア部分の数平均分子量が６５０〜９５０であって３００％モジュラスが０．１８ｇ／デシテックス以下のポリウレタン弾性繊維が挙げられるが、これに限定されるものでない。
【０００８】
弾性繊維の形態にも特に限定はなく、長繊維でも短繊維でもよい。また長さ方向に均一なものや太細のあるものでもよく、繊維断面も丸型、三角、Ｌ型、Ｔ型、Ｙ型、Ｗ型、八葉型、偏平、ドッグボーン型等の多角形型、多葉型、中空型や不定形でもよい。弾性繊維の巻パッケージの形態は一般的にはチーズ状のものが多く用いられるが、他のパーン状等でもよく、静置できる状態の形であれば任意の形のものが使用できる。弾性繊維の繊度は１１〜５２０デシテックスが好ましく、１７〜１５５デシテックスがより好ましい。なお、ここでの弾性繊維の繊度はドラフトをかける前の巻パッケージ表示の繊度をいう。
【０００９】
本発明の製造方法に用いられる非弾性繊維には特に限定はなく、ポリエステル系繊維、ポリアミド系繊維、アクリル系繊維、ポリトリメチレンテレフタレート系繊維等の合成繊維、アセテート繊維等の半合成繊維、キュプラ、レーヨン等の再生繊維、綿、麻、ウール等の天然繊維、アラミド繊維や炭素繊維等の繊維種が用いられる。非弾性繊維の形態は短繊維や長繊維、丸断面や異型断面（中空を含む）でもよく、また原糸、未延伸糸（ＰＯＹを含む）、高速紡糸糸条（例えばスピンテイクアップやスピンドローテイクアップ）、太細糸、意匠糸等を用いることができる。これらの繊維はそのまま何の加工も施さない糸条でもよく、未延伸糸やＦＯＹ（全配向糸）を延伸仮撚り加工した糸条、押込法、賦形法または流体噴射法の非加撚法等の加工を施した糸条でもよい。
【００１０】
さらにこれらの繊維種や形態を一種以上組み合わせた複合糸（混紡、交絡、交撚、複合仮撚、流体噴射加工等公知の複合手段を利用）でもよく、また同種もしくは異種の非弾性繊維を複数本用いてもよく、目的に応じて選定すればよい。
非弾性繊維の繊維は１１〜３３００デシテックスが好ましく、２２〜９４０デシテックスがより好ましい。また非弾性繊維はマルチフィラメント繊維であるのが好ましく、非弾性繊維を構成する単糸繊度は２０デシテックス以下、特に非弾性繊維で弾性繊維を覆いやすい点から７デシテックス以下がより好ましい。またソフトな風合いの布帛を作る場合等には、ハイカウントの非弾性繊維を使うことが好ましい。
【００１１】
本発明において、伸縮性複合糸とは弾性繊維と非弾性繊維を複合した糸条をいい、複合には合撚、鞘芯構造となるカバリング、流体噴射による引き揃え混繊、精紡交撚等が含まれる。また伸縮性複合糸は、弾性繊維と非弾性繊維の二者混の複合糸だけでなく、該伸縮性複合糸にさらにもう一本の他の繊維糸条を複合すること、またはそれ以上の本数の糸条を複合してもよい。さらに伸縮性複合糸同士を合撚等の手段で複合してもよく、用途に応じ、相手糸の種類や本数を適宜変更すればよい。伸縮性複合糸の繊度には特に限定されないが、トータル繊度は１５〜３８００デシテックスが好ましく、４０〜１０５０デシテックスがより好ましい。
また伸縮性複合糸の中に占める弾性繊維（ドラフトをかけた後の弾性繊維）の重量混率は５０％以下が好ましい。５０％を超えるとストレッチ率や回復率は大きくなるが、複合相手素材の特徴が生かせなくなり、また取扱性が低下する場合がある。より好ましい重量混率は３〜３０％である。
【００１２】
本発明において、伸縮性弾性複合糸は、弾性繊維の巻パッケージから弾性繊維を引き出して給糸装置に供給し、該給糸装置から送り出された弾性繊維を非弾性繊維と複合して製造されるが、前記給糸装置には変速可能な送り出し装置が設置されており、該送り出し装置により、前記巻パッケージから引き出して該送り出し装置に供給する弾性繊維の張力（Ｔ1 ）と該送り出し装置から送り出される弾性繊維の張力（Ｔ2 ）との関係が、０．０５≦Ｔ1 ／Ｔ2 ≦０．７となるように弾性繊維の張力が調整される。
【００１３】
上記変速可能な送り出し装置は、給糸装置に設置され、巻パッケージから弾性繊維を一定張力で引き出すことができ、かつ該給糸装置から一定張力で弾性繊維を送り出すことができる機能を備える。このような装置としては、例えば、弾性繊維の張力を検出できるセンサーと、弾性繊維を緊張させて送り出す機能と、検出した弾性繊維の張力値を送り出し機能に精度よくフィードバックできる機能とを備えた装置が挙げられる。該送り出し装置は、弾性繊維を数巻きした円筒状ローラー、弾性繊維をニップしたローラー、ベルト等によって構成することができる。また送り出し装置に給糸する前の弾性繊維に張力を付与する手段としては、バネ付きのワッシャータイプのテンサー、張力を検出して張力を負荷する機構の備わったもの、ガイドのみを用いて屈曲角度だけで張力を付与するもの、またはこれらを組み合わせたもの等が挙げられる。
【００１４】
送り出し装置として円筒状ローラーを使用する場合、センサーからの張力信号が設定値を超えた場合には張力補正用の円筒状ローラーの回転速度を落とせばよく、また設定値を下回った場合には回転速度を上げればよい。ローラーの回転駆動にはステッピングモーターやサーボモーター等が使用される。またセンサーには、ひずみゲージや圧電素子による電気的な信号をモーターに伝達する方式や、張力によるセンサー位置の物理的な僅かな変位を無段階変速軸に伝えてモーターに伝達する方式等が採用される。センサーとモーター間の応答速度は速いほうが好ましいが、通常は１０Ｈｚ以上であれば特に支障はない。
【００１５】
このように本発明に用いられる給糸装置は、従来のような２つのローラ間の速度比を常に一定比で駆動供給させるタイプでなく、上記した変速可能な送り出し装置により弾性繊維の張力変動を吸収して供給できるタイプである。具体的には、弾性繊維が巻パッケージから引き出されて給糸装置に供給される間の弾性繊維の張力変動をとらえ、給糸ローラー速度等を瞬時に変速して張力補正する機構が備わったものであり、例えば、ＢＴＳＲ社やメミンガーアイロ社等のテンションコントロール装置のように、張力検出部と瞬時に変速できる巻き取りロールとを連動させた給糸装置が使用可能である。
【００１６】
上記変速可能な送り出し装置により調整される、巻パッケージから引き出して送り出し装置に供給する弾性繊維の張力（Ｔ1 ）と該送り出し装置から送り出される弾性繊維の張力（Ｔ2 ）の関係は０．０５≦Ｔ1 ／Ｔ2 ≦０．７であり、好ましくは０．０８≦Ｔ1 ／Ｔ2 ≦０．４である。Ｔ1 ／Ｔ2 が０．０５未満では、弾性繊維の巻パッケージからの解舒張力変動に過敏に応答し、給糸装置内の張力補正用の送り出し装置前において弾性繊維に緩みが生じ、張力補正用のローラーに弾性繊維が巻き付く等の不具合が発生する。またＴ1 ／Ｔ2 が０．７を超えると、給糸装置内の張力補正用の送り出し装置に給糸する前に設けられたテンサーやガイド等の張力負荷が大きく、その張力変動も大きくなるため、送り出し機構における制御が困難となる。特にＴ1 ／Ｔ2 が１を超えた場合は弾性繊維の糸斑が発生する。
【００１７】
次に、本発明における伸縮性複合糸の製造方法を具体的に説明する。
弾性繊維と非弾性繊維をリング撚糸機を用いて製造する場合には、弾性繊維の巻パッケージをリング撚糸機上または別の場所に静置し、該巻パッケージから一定張力で引き出した弾性繊維と、リング撚糸機のクリール等にかけた非弾性繊維とを引き揃えた後、施撚して伸縮性複合糸を得る。このときの合撚数は、撚り係数で２５００〜２００００が一般的であり、好ましくは４０００〜１５０００とするのがよい。撚り係数が２５００未満では、弾性繊維と非弾性繊維の絡み度合いが弱いためにスリップインが出やすくなり、また布帛上に弾性繊維が浮き出る目ムケ欠点等の現象が生じ易くなる。また撚り係数が２００００を超えると撚りが強すぎるために二重撚りが発生して布帛品質が低下し易く、また伸縮性が発現しにくくなる。なお、撚り係数とは、伸縮性複合糸のデシテックス繊度の平方根に１ｍ当たりの合撚数を乗じた数値をいう。
【００１８】
合撚手段としては上記のリング撚糸機の他に、例えばダブルツイスター、イタリー式撚糸機、合撚機等を用いることができる。合撚する場合、一工程で作ることも可能であり、合撚数を多くする場合には二工程とすることも可能である。一工程の場合にはリング撚糸機等で必要な撚数を施撚すればよく、二工程の場合には予め弾性繊維と非弾性繊維の両者を例えば、リング撚糸機等を用いて低撚数（２０〜３００Ｔ／ｍ）で合撚し、次いでダブルツイスター等で合撚すればよい。また複合仮撚り等の手段で引き揃える等の工程を単独または組み合わせ、次いで合撚してもよい。さらに非弾性繊維を無撚の状態で弾性繊維と引き揃えて空気等の流体交絡処理を施し、次いでダブルツイスター等で合撚してもよい。
【００１９】
空気交絡装置を用いる場合は、弾性繊維と非弾性繊維を引き揃える工程に取り付ければよく、一般にはリワインダーや合撚機に取り付け、両者を引き揃えた直後に空気交絡装置を通過させ、弾性繊維と非弾性繊維に交絡点を付与することが可能である。なお、弾性繊維と非弾性繊維を引き揃えて空気交絡処理を施す場合は、非弾性繊維に５％までのオーバーフィードをかけて糸を送り込んでもよく、張力をかけて交絡処理をしてもよい。
弾性繊維と非弾性繊維を引き揃えた後、空気交絡処理を施して伸縮性複合糸を製造方法は、単糸繊度の小さいマルチフィラメントタイプの非弾性繊維ほど空気圧を低めに設定しても弾性繊維との交絡状態がよくなり、非弾性繊維に与えるダメージが少なくなり、また圧縮空気をつくる圧縮機の電気代節約等の経済面からも好ましい。
【００２０】
空気交絡装置は、トルネル状の一方または数カ所から圧縮空気がトンネル内に噴射され、糸が開繊、交絡することで弾性繊維と非弾性繊維に交絡点が形成されるようにしたもので、インターレーサーノズル、エンタングルノズル等の名称で呼ばれている。このような空気交絡装置は、阿波スピンドル社、東レ・プレシジョン社、ヘバライン社等から市販されている。これらの交絡装置に供給する圧縮空気の圧力は、糸種や巻き取り速度等によって変更する必要があるが、通常２９〜５９０ｋＰａ、好ましくは４９〜３４０ｋＰａがよく、非弾性繊維に毛羽等のダメージを与えることのない低圧ほどよいが、交絡が適切に付与される圧力に設定する必要がある。
【００２１】
また巻き取り速度の遅い場合には圧縮空気の圧力は低くすればよく、巻き取り速度が早い場合には同圧力を高くすればよい。なお、巻き取り速度は、巻き取り機械のタイプにもより、甘撚りを入れながら巻き取るタイプでは、１０〜３００ｍ／ｍｉｎ、無撚のまま巻き取るタイプでは１００〜８００ｍ／ｍｉｎの巻き取り速度が一般に用いられている。さらに、非弾性繊維のフィラメント数が多い場合や糸の伸度が大きい糸の場合ほど、圧縮空気の圧力を低くして交絡させることができる。
交絡数は、次工程での工程性能に関わり、交絡数が多いほど次工程の性能は良くなる反面、毛羽等の糸品質が低下し、糸が固く締まり過ぎ、また交絡部分と非交絡部分の集束度合いの差が布帛上に出るイラツキと称する欠点になることもあるため、適切な範囲とするのが好ましく、通常、交絡数は１０個／ｍ〜１００個／ｍの範囲がよく、２０個／ｍ〜６０個／ｍの範囲がより好ましい。この交絡数とはＪＩＳ−Ｌ−１０１３（１９９９）交絡度と同じ意味である。
【００２２】
伸縮性複合糸が鞘芯構造のカバリング糸の場合には、カバリング機や中空スピンドルを備えたタイプの撚糸機（ダブルツイスター等）等で得ることができる。例えば、中空のスピンドルの中へ、ガイドを経て一定張力で管理した弾性繊維を給糸し、該弾性繊維の周りに非弾性繊維を巻き付け、巻き取りを行えばよい。
また伸縮性複合糸がエアー混繊糸の場合には、一定張力で管理した弾性繊維と非弾性繊維を引き揃えてインターレーサーノズルで空気交絡処理を行って巻き取りを行えばよく、非弾性繊維はオーバーフィードすることが好ましい。エアー混繊の場合、巻き取り速度が例えば８００ｍ／ｍｉｎ程度と高速で生産する場合もあり、このような場合には従来のクレードル方式では弾性繊維が揺れる現象が出て合糸後の弾性繊維の混繊状態、いわゆる被覆性が不均一になりやすいが、本発明の給糸方法では弾性繊維の被覆性を均一で良好なものとすることができ、合糸後の中心部分に位置させるのに有効である。エアー混繊する際、非弾性繊維が仮撚り加工糸等の捲縮を持った糸の場合は＋５％まで、非弾性繊維が何らの加工もなされていない糸の場合には＋３％までのオーバーフィードをかけることが好ましいが、これに限るものではない。
【００２３】
伸縮性複合糸を仮撚り機上で仮撚り加工時に製造する場合には、仮撚りゾーンに非弾性繊維と弾性繊維を同時に挿入してもよく、仮撚りされた後の非弾性繊維と弾性繊維を複合する形でもよい。仮撚りに供する非弾性繊維は未延伸糸、半延伸糸または延伸糸でもよいが、生産効率からは未延伸糸や半延伸糸が好ましい。また空気交絡装置は仮撚りゾーン前または巻き取り前に設けることが好ましい。
さらに伸縮性複合糸が精紡交撚糸の場合には、精紡時に供給する弾性繊維を一定張力で給糸できる装置を用いればよい。
なお、上記以外でも、例えば、レピアルーム、エアージェットルーム、ウォータージェットルーム等により、緯糸飛走用のノズルへ非弾性繊維と一定張力で管理した弾性繊維を供給して緯糸を経糸開口内に飛走させて織物を得ることもでき、また経糸の一部としても使用可能である。さらに、丸編機、経編機、横編機等の機械を用い、ニット用としても使用することができる。その他、非衣料分野である産業資材用等の太繊度使いの織編物用機械にも使用可能である。
【００２４】
本発明において、伸縮性複合糸を製造する際の弾性繊維の張力は、巻パッケージからの弾性繊維の応力伸度曲線から、所望のストレッチ特性が得られる張力を決めればよい。一般には、弾性繊維は無負荷状態での長さの１．５〜４倍に引っ張られた状態で他の繊維と複合される。
伸縮性複合糸は取扱性を向上させるために、複合後に撚止めのスチームセット等の方法により７０〜９０℃程度の温度で２０〜６０分の熱セットを施してもよい。また、複合糸のトルクが大きい場合には、撚止めを７０〜９０℃程度の温度で２０〜３０分の熱セットを２回繰り返し施してもよい。
【００２５】
伸縮性複合糸に用いる非弾性繊維が仮撚り加工糸の場合、合撚、カバリング等の複合時の撚方向は非弾性繊維の仮撚り加工糸の仮撚方向と異方向にすることが高ストレッチ性を持った織物を得る上で好ましいが、トルク止めのセットの必要性や伸縮複合糸の取扱性または織物の外観や風合い等に応じて複合時の撚り方向や撚数を決めればよい。また非弾性繊維が紡績糸の場合には、紡績糸の撚り方向とは異方向に合撚やカバリング等することが高ストレッチ性を得るには好ましく、例えば合撚時の合撚数は紡績撚数を超えることなく設定することが糸強度の面から好ましいが、紡績糸を複数本使う等すれば、紡績撚数を超えることが可能であり、用途に応じて適宜決めればよい。
【００２６】
【実施例】
以下、本発明を実施例により詳述する。
なお、本発明において、非弾性繊維の繊度の測定は、ＪＩＳ−Ｌ−１０１３（１９８１）に従って測定した。また弾性繊維の繊度は、標準状態の雰囲気中で無荷重の状態で弾性繊維をぶら下げてその糸長（Ｌ：単位ｍ）を測り、その重量（Ｗ：単位ｇ）を測定してデシテックス（Ｔ）を式、Ｔ＝（Ｗ／Ｌ）×１００００により算出し、これを３０回行ってその平均値を繊度とした。弾性繊維の繊度測定の際の糸長Ｌの長さには特に限定はないが、精度よく数値を求めるためには弾性繊維の自重効果による伸びが影響されない程度の長さとするのが好ましく、例えば、２２デシテックス〜７８デシテックス程度のものでは糸長Ｌを１ｍ前後のとするのが好ましい。また、弾性繊維のドラフトとは、弾性繊維を無負荷状態での長さに対する伸長倍率をいう。
【００２７】
さらに例中における各評価は以下の方法により測定し、評価た。
（１）伸び率、回復率
ＪＩＳ−Ｌ−１０９６（１９９９）Ｂ−１法（定荷重法）に準じ、織物の伸び率、回復率を求めた。サンプル採取個所は、各条件の織物の経糸中央部で、織物幅方向について行った。
なお、各測定箇所毎の平均値の最大値と最小値の差を伸び率および回復率のばらつきと見なし、差が１０％を超えるものを問題ありとする。
（２）織物品質
織布業務に５年間以上携わった５人によって、織物を静止した状態で広げ、各人の視覚によって織物の品質を下記の評価基準（Ｗ０〜Ｗ４）に従って評価し、５人の平均で表した。
なお、Ｗ０〜Ｗ２を合格とする。また下記評価において、かすり状ヒケとは、弾性繊維の収縮斑に起因する複合糸の繊度斑や撚数斑をいい、織物表面上で筋を呈することをいう。引きつりとは、弾性繊維が正常部分より緊張状態が強いために起こるもので、織物内の糸が他の部分より強く引っ張られたように吊った状態をいい、他の部分と光線の反射を異にしたり、筋ができたり織物面に波状を呈することをいう。
Ｗ０：織物の表面にかすり状ヒケ、引きつりなどの欠点がなく、経糸または横糸が均一な状態にあり、上品な外観を有する。
Ｗ１：かすり状ヒケや引きつりが少し見られるが上品な外観を有する。
Ｗ２：かすり状ヒケや引きつりがあるともないともいえない表面状態を有する。
Ｗ３：ややかすり状ヒケや引きつりがある。
Ｗ４：かすり状ヒケや引きつりがある。
【００２８】
実施例１
経糸にポリエステル繊維（旭化成社製）３４デシテックス／１８ｆの糊付け糸を用い、また緯糸には、弾性繊維としてポリウレタン系弾性繊維（旭化成社製商品名ロイカ）２２デシテックスと、非弾性繊維としてポリエステル繊維（旭化成社製）３４デシテックス／１８ｆとからなる本発明の製造方法で得られた伸縮性複合糸を用い、織物を製造した。
上記伸縮性複合糸は、給糸装置の送り出し装置前の弾性繊維の張力（Ｔ1 ）を０．６ｃＮ／ヤーン、弾性繊維の送り出し装置後の給糸張力（Ｔ2 ）を４．０ｃＮ／ヤーンとし、Ｔ1 ／Ｔ2 ＝０．１５の条件のもとで、非弾性繊維の給糸張力を０．０８ｃＮ／デシテックスに設定し、弾性繊維と非弾性繊維を引き揃え、パーンワインダー（村田機械社製、タイプ３０３−II）を用いて５５０ｍ／ｍｉｎの巻き取り速度で引き揃え、インターレーサーノズル（東レ・プレシジョン社製、タイプＰＣ２２０）で２２１ｋＰａの圧力で交絡を加えながら合糸した。弾性繊維の給糸装置にはテンションコントロール装置（ＢＴＳＲ社製、モデルＫＴＦ／２５ＨＰ）を用いた。次いで、ダブルツイスター（村田機械社製、タイプ３１０Ｆ）を用い、設定スピンドル回転数１２０００ｒｐｍ、設定撚数１５００Ｔ／ｍで、Ｚ方向に施撚して得た。
【００２９】
この伸縮性複合糸を１９０ｃｍ幅のエアージェットルーム（津田駒工業社製、タイプＺＡ−２０９、１ピックのみ使用）を用いて、筬密度７２羽／３．７９ｃｍ（１羽２本入れ）、通し幅１８２．４ｃｍ、織機回転数４５０ｒｐｍ、緯糸打ち込み密度１１０本／２．５４ｃｍで平織物の生機を製造し、この生機を定法の染色加工に従い、経糸密度１５７本／２．５４ｃｍ、緯糸密度１２１本／２．５４ｃｍの織物を得た。
得られた織物は、平均の伸び率が４０．１％、回復率が９１．０％であり、緯方向の伸び率と回復率は、表１に示すように、ばらつきが少なく、織物の表面状態は細かなシボ感があって撚糸タッチであるが均一な表面を成しているものであった。また織物の品質はかすり状ヒケや引きつりが見られない良好な織物であった。
【００３０】
実施例２
実施例１において、給糸装置の送り出し装置前の弾性繊維の張力（Ｔ1 ）を０．２２ｃＮ／ヤーン、弾性繊維の送り出し装置後の給糸張力（Ｔ2 ）を４．０ｃＮ／ヤーンとし、Ｔ1 ／Ｔ2 ＝０．０５５の条件とした以外は実施例１と同様の方法で織物を得た。
得られた織物は表１に示すように、伸び率および回復率共にばらつきが少なく、織物の品質はかすり状ヒケや引きつりが見られない良好な織物であった。
【００３１】
実施例３
実施例１において、給糸装置の送り出し装置前の弾性繊維の張力（Ｔ1 ）を２．７ｃＮ／ヤーン、弾性繊維の送り出し装置後の給糸張力（Ｔ2 ）を４．０ｃＮ／ヤーンとし、Ｔ1 ／Ｔ2 ＝０．６８の条件とした以外は実施例１と同様の方法で織物を得た。
得られた織物は表１に示すように、伸び率および回復率共にばらつきが少なく、織物の品質はかすり状ヒケや引きつりが見られない良好な織物であった。
【００３２】
比較例１
実施例１において、給糸装置の送り出し装置前の弾性繊維の張力（Ｔ1 ）を０．１５ｃＮ／ヤーン、弾性繊維の送り出し装置後の給糸張力（Ｔ2 ）を４．０ｃＮ／ヤーンとし、Ｔ1 ／Ｔ2 ＝０．０３の条件とした以外は実施例１と同様の方法で織物を得た。
得られた織物は表１に示すように、回復率にばらつきがあり、また織物の品質はかすり状ヒケとやや強い引きつりが見られるものであった。
【００３３】
比較例２
実施例１において、給糸装置の送り出し装置前の弾性繊維の張力（Ｔ1 ）を３．３ｃＮ／ヤーン、弾性繊維の送り出し装置後の給糸張力（Ｔ2 ）を４．０ｃＮ／ヤーンとし、Ｔ1 ／Ｔ2 ＝０．８３の条件とした以外は実施例１と同様の方法で織物を得た。
得られた織物は表１に示すように、回復率にばらつきがあり、また織物の品質はかすり状ヒケが強く見られ、引きつりも見られるものであった。
【００３４】
実施例４
経糸にセルロースマルチフィラメント繊維（旭化成社製商品名キュプラベンベルグ）８４デシテックス／４５ｆの糊付け糸を用い、緯糸に、弾性繊維としてポリウレタン系弾性繊維（旭化成社製商品名ロイカ）２２デシテックスと、非弾性繊維としてセルロースマルチフィラメント繊維（旭化成社製商品名キュプラベンベルグ）８４デシテックス／４５ｆとからなる本発明の製造方法で得られた伸縮性複合糸を用い、織物を製造した。
この伸縮性複合糸は、給糸装置の送り出し装置前の弾性繊維の張力（Ｔ1 ）を０．６ｃＮ／ヤーン、弾性繊維の送り出し装置後の給糸張力（Ｔ2 ）を４．０ｃＮ／ヤーンとし、Ｔ1 ／Ｔ2 ＝０．１５の条件のもとで、非弾性繊維の給糸張力を０．０８ｃＮ／デシテックスに設定し、弾性繊維と非弾性繊維を引き揃え、パーンワインダー（村田機械社製、タイプ３０３−II）を用いて５００ｍ／ｍｉｎの巻き取り速度で引き揃え、インターレーサーノズル（東レ・プレシジョン社製、タイプＰＣ２２０）で１４７ｋＰａの圧力で交絡を加えながら合糸した。弾性繊維の給糸装置にはテンションコントロール装置（ＢＴＳＲ社製、モデルＫＴＦ／２５ＨＰ）を用いた。次いで、ダブルツイスター（村田機械社製、タイプ３１０Ｆ）を用い、設定スピンドル回転数１００００ｒｐｍ、設定撚数１０００Ｔ／ｍで、Ｚ方向に施撚して得た。
【００３５】
上記伸縮性複合糸は、同じ太さ（繊度）の弾性繊維で巻パッケージの残りの糸量が１０ｇ〜５００ｇまでの９種類の重量（１０ｇ、３０ｇ、５０ｇ、１００ｇ、１５０ｇ、２００ｇ、３００ｇ、４００ｇ、５００ｇ）となる弾性繊維の巻パッケージを用意し、それぞれの弾性繊維を使用して各々１００ｇづつ作製した。
これらの伸縮性複合糸を連続的につなげ、つなぎ目が判るように印を付けて緯糸に用い、１７０ｃｍ幅のエアージェットルーム（津田駒工業社製、タイプＺＡ−１０３、１ピックのみ使用）を用いて、筬密度６７羽／３．７９ｃｍ（１羽２本入れ）、通し幅１６８．６ｃｍ、織機回転数５００ｒｐｍ、緯糸打ち込み密度８４本／２．５４ｃｍで平織物の生機を製造した。この生機を定法の染色加工に従い、経糸密度１３１本／２．５４ｃｍ、緯糸密度８５本／２．５４ｃｍの織物を得た。
得られた織物は、平均の伸び率が２８．９％、回復率が７８．５％であり、緯方向の伸び率と回復率を表１に示したが、前記９種類の弾性繊維の巻パッケージを用いているにもかかわらずそのばらつきが少なく、織物の表面状態は細かなシボ感があるが均一な表面を成しており、また、織物の品質はかすり状ヒケや引きつりがほとんど見られない良好な織物であった。
【００３６】
比較例３
実施例４において、弾性繊維の給糸方法をクレードルタイプで行った以外は実施例４と同様の方法で織物を得た。すなわち、弾性繊維の巻パッケージをクレードルに取り付けて駆動ローラーに押しあて、ドラフトが３．０となるように駆動ローラーの回転速度を設定し、パーンワインダー（村田機械社製、タイプ３０３−II）を用いて５００ｍ／ｍｉｎの巻き取り速度で弾性繊維と非弾性繊維を引き揃え、インターレーサーノズルで１４７ｋＰａの圧力で交絡を加えながら合糸した。次いで、ダブルツイスターで施撚した後は、実施例１と同じように行い、経糸密度１３１本／２．５４ｃｍ、緯糸密度８５本／２．５４ｃｍの織物を得た。
得られた織物は表１に示すように、回復率にばらつきがあり、また織物の品質はかすり状ヒケや引きつりが若干見られる織物であった。
【００３７】
比較例４
実施例４において、弾性繊維の給糸方法を通常のカバリング機に備わっている転がし取り方式で行った以外は実施例４と同様の方法で織物を得た。すなわち、弾性繊維の巻パッケージを同速度で回転する駆動ローラー間に置き、該弾性繊維の巻パッケージからドラフトをかけながら引っ張り出した弾性繊維の周りに非弾性繊維を旋回させたカバリング糸を得た。その後は実施例４と同様にして織物を仕上げ、経糸密度１３２本／２．５４ｃｍ、緯糸密度８５本／２．５４ｃｍの織物を得た。
得られた織物は表１に示すように、回復率にばらつきが見られ、また織物の物表面にはかすり状ヒケや引きつりが若干見える織物であった。
【００３８】
実施例５
経糸にポリエステルマルチフィラメント繊維（旭化成社製）１７０デシテックス／７２ｆの８００Ｔ／ｍ（Ｚ撚）撚糸を用い、緯糸に、弾性繊維としてポリウレタン系弾性繊維（旭化成社製商品名ロイカ）４４デシテックスと、非弾性繊維としてポリエステルマルチフィラメント繊維の未延伸糸（旭化成社製）２３０デシテックス／４８ｆとからなる本発明の製造方法で得られた伸縮性複合糸を用い、織物を製造した。
この伸縮性複合糸はつぎのようにして製造した。まず、ベルトニップ加撚り方式の仮撚り加工機（村田機械社製、タイプマッハ３３Ｈ）を用いて、糸速度５００ｍ／ｍｉｎ、ベルト交差角１１０度（仮撚り数約２３１０Ｔ／ｍ）、ドロー比１．４０２、ＶＲ（ベルト速度／糸速度）１．４６３、第１ヒーター温度２２０℃の条件で１ヒーターＺ方向加撚の仮撚りを行い、１６７デシテックスに延伸仮撚りした糸と、外部に静置した弾性繊維４４デシテックスの巻パッケージから解舒して給糸装置で一定張力を付与した弾性繊維とを、ヒーターと巻き取り間に設けたインターレーサノズル（ヘバライン社製、タイプＨＦＰ−Ｐ２２１）へノズル直前で引き揃えて挿入し、３４３ｋＰａの圧力で交絡を加えながら、巻き取りフィード率５．００％で巻き取った。
【００３９】
給糸装置の送り出し装置前の弾性繊維の張力（Ｔ1 ）を１．７ｃＮ／ヤーン、弾性繊維の送り出し装置後の給糸張力（Ｔ2 ）を７．８ｃＮ／ヤーンとし、Ｔ1 ／Ｔ2 ＝０．２２の条件の元で、非弾性繊維の給糸張力を０．０８ｃＮ／デシテックスに設定し、弾性繊維と非弾性繊維を引き揃え、弾性繊維の給糸装置にはテンションコントロール装置（ＢＴＳＲ社製、モデルＫＴＦ／２５ＨＰ）を用いた。次いで、ダブルツイスター（村田機械社製、タイプ３１０Ｆ）を用い、設定スピンドル回転数８０００ｒｐｍ、設定撚数７００Ｔ／ｍで、Ｚ方向に施撚した伸縮性複合糸を得た。
なお、伸縮性複合糸は、実施例４と同様に、残りの弾性繊維が１０ｇ〜５００ｇまでの９種類の重量（１０ｇ、３０ｇ、５０ｇ、１００ｇ、１５０ｇ、２００ｇ、３００ｇ、４００ｇ、５００ｇ）となる弾性繊維の巻パッケージを用意し、それぞれの弾性繊維を使用して各々１２０ｇづつ作製した。
【００４０】
次に、これらの伸縮性複合糸を連続的につなげ、つなぎ目が判るように印を付けて緯糸に用い、１９０ｃｍ幅のエアージェットルーム（津田駒工業社製、タイプＺＡ−２０９、１ピックのみ使用）を用いて、筬密度５６羽／３．７９ｃｍ（１羽２本入れ）、通し幅１８４．６ｃｍ、織機回転数４６０ｒｐｍ、緯糸打ち込み密度７８本／２．５４ｃｍで綾織物の生機を製造した。この生機を定法の染色加工に従い、経糸密度１０６本／２．５４ｃｍ、緯糸密度８２本／２．５４ｃｍの織物を得た。
得られた織物は、平均の伸び率が２５．２％、回復率が９３．７％であり、緯方向の伸び率と回復率は表１に示すように、前記９種類の弾性繊維を用いているにもかかわらずばらつきが少なく、織物は均一な表面状態を成しており、また、織物の品質はかすり状ヒケや引きつりが見られない良好な織物であった。
【００４１】
比較例５
実施例５において、弾性繊維の給糸方法をクレードルタイプで行った以外は実施例５と同様にして、弾性繊維の巻パッケージをクレードルに取り付けて駆動ローラーに押しあて、ドラフトが３．０となるように駆動ローラーの回転速度を設定して、弾性繊維を供給して、仮撚り加工機を用いて延伸糸と合糸し、次いで、この糸をダブルツイスターで施撚した。その後、実施例３と同様の方法で生機を製造し、処理を行い、経糸密度１０６本／２．５４ｃｍ、緯糸密度８２本／２．５４ｃｍの織物を得た。
得られた織物は表１に示すように、伸び率や回復率にばらつきがあり、また織物の品質はかすり状ヒケや引きつりが見られる織物であった。
【００４２】
【表１】
なお、表１中の＊印は、その値が合格を外れているか、または問題のあることを示す。
【００４３】
【発明の効果】
本発明の伸縮性複合糸の製造方法によれば、弾性繊維を張力で管理して給糸するため、弾性繊維の内外層での物性差をなくして安定して非弾性繊維と複合することができる。従って、この伸縮性複合糸を使用することにより、ストレッチ特性や非弾性繊維の混繊状態が均一になり、かすり状ヒケや引きつりの発生がなく、また弾性繊維が均一に伸縮性複合糸の中心側に位置しないことによる弾性繊維への被覆不良による目ムキ欠点の発生を防止でき、ストレッチ特性や品質の安定した布帛を提供することができる。また、本発明の製造方法によれば、伸縮性複合糸を高速で製造することができ、品質が安定することに加え、弾性繊維の巻パッケージ内外層管理の手間が省け、さらにトランスファーテールを利用して機械を止めることなく、連続した加工が可能となり、さらに大きな設備投資をすることなく伸縮性複合糸を簡便に得ることができる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing a stretchable composite yarn, and more particularly, to a method for producing a stretchable composite yarn capable of producing a stretchable composite yarn having uniform elongation characteristics simply, at high speed and stably. .
[0002]
[Prior art]
With the recent trend of stretch fabrics, production of stretchable composite yarns using elastic fibers is often performed. As a manufacturing method of the elastic composite yarn, a method of drawing out the elastic fiber by rotating a wound package of the elastic fiber is mainly used. Generally, a covering machine having a structure in which an inelastic fiber is wound around the elastic fiber, Manufactured using a spinning machine or the like that obtains a spun and twisted yarn while twisting short fibers. These devices are also provided with a draft device for feeding yarn while stretching elastic fibers. For example, an elastic fiber wound package is placed between two driving rollers rotating at the same speed, and the draft on the draft is made by tensioning the elastic fibers by delaying the circumferential speed of the driving roller from the winding side speed. Pulling out (rolling-off type) or attaching an elastic fiber wound package to the cradle, pressing the elastic fiber wound package against the rotating drive roller with a force such as a spring or weight, and rotating it around the circumference of the wound package A method of drawing an elastic fiber and drawing the elastic fiber by delaying the peripheral speed of the wound package of the elastic fiber from the speed on the winding side is known.
However, the installation of the draft mechanism as described above requires a large capital investment, and when the elastic fiber wound package is rotated at a high speed, the yarn is wound around the wound package itself or the driving roller, and the yarn cannot be unwound. Therefore, there is a limit to the rotational speed of the wound package, and there is a problem that the production efficiency of the machine is lowered.
[0003]
Japanese Patent Application Laid-Open No. 10-121342 proposes a method in which elastic fibers are unwound from a wound package of elastic fibers that are left standing and stretched at a constant magnification between a plurality of rollers. However, in the wound package of elastic fibers, the inner layer is tightened by the yarn on the outer layer side, and there is a difference in yarn fineness in the inner and outer layers, and a difference in yarn fineness due to the winding form at the upper and lower ends and the center of the wound package. Therefore, when the elastic fiber drawn out from the wound package is stretched at a constant ratio by a roller from beginning to end, there is a difference in shrinkage characteristics at the switching part between the inner and outer layers of the wound package, resulting in defects such as crushed sink marks and pulling. There was a big problem that the quality deteriorated.
Accordingly, there has been a strong demand for a method for producing a stretchable composite yarn that can efficiently produce a stretchable composite yarn of elastic fibers and non-elastic fibers and that can provide a fabric with stable quality.
[0004]
[Problems to be solved by the invention]
An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a fabric that can produce a composite yarn of elastic fiber and non-elastic fiber easily, at high speed and stably, and with stable quality. An object of the present invention is to provide a method for producing a stretchable composite yarn.
[0005]
[Means for Solving the Problems]
In view of the above problems, the present inventors have conducted intensive studies on the properties of the stretchable composite yarn by the yarn feeding method and the stretch properties of the fabric using the stretchable composite yarn. As a result, the tension at the time of input / output of the elastic fiber is constant. By adjusting within the range and combining with the non-elastic fiber, the elastic composite yarn can be obtained stably at high speed, and the stretch characteristics and the quality of the fabric obtained using this elastic composite yarn are stable. The present invention has been found.
The invention claimed in the present application in order to achieve the above object is as follows.
[0006]
(1) When the elastic fiber is pulled out from the elastic fiber wound package and supplied to the yarn feeding device, and the elastic fiber fed from the yarn feeding device is combined with the non-elastic fiber to produce the stretchable composite yarn, A variable speed feeding device is installed in the yarn device, and the tension (T) of the elastic fiber that is pulled out from the winding package and supplied to the feeding device by the feeding device. 1 ) And the tension (T) of the elastic fiber delivered from the delivery device 2 ) 0.05 ≦ T 1 / T 2 A method for producing a stretchable composite yarn, wherein the tension of the elastic fiber is adjusted so as to satisfy a relationship of ≦ 0.7.
(2) The method for producing a stretchable composite yarn according to (1), wherein the elastic fiber and the non-elastic fiber are aligned and subjected to an air entanglement treatment and then combined.
(3) The method for producing a stretchable composite yarn according to (1) or (2), wherein the inelastic fiber is a yarn obtained by drawing a false-twisted undrawn yarn.
(4) A method for producing a stretchable composite yarn comprising twisting the stretchable composite yarn according to any one of (1) to (3).
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail.
As the elastic fiber used in the production method of the present invention, there are no particular limitations on the raw material polymer and the spinning method, and polymers such as polyurethane and polyether ester can be used. Spinning methods using dry spinning, melt spinning, wet spinning, chemical reaction, etc. can be adopted, but the elongation at break is 400% to 1000%, which is excellent in stretchability, and is a normal treatment in the presetting process during dyeing. It is preferably an elastic fiber that does not impair stretchability at a temperature around 190 ° C.
For example, it comprises a polyurethane obtained from a copolymerized polyalkylene ether diol, an aromatic diisocyanate mainly composed of 4,4′diphenylmethane diisocyanate and a bifunctional diamine, and the urethane portion has a number average molecular weight of 6000 to 9500 and a urea portion. Examples include polyurethane elastic fibers having a number average molecular weight of 650 to 950 and a 300% modulus of 0.18 g / dtex or less, but are not limited thereto.
[0008]
The form of the elastic fiber is not particularly limited, and may be a long fiber or a short fiber. Also, it may be uniform or thick in the length direction, and the fiber cross section is a polygon such as a round shape, a triangle shape, an L shape, a T shape, a Y shape, a W shape, an eight leaf shape, a flat shape, and a dogbone shape. It may be a mold, a multi-leaf type, a hollow type or an indeterminate form. The form of the elastic fiber wound package is generally cheese-shaped, but it may be in the form of any other pann or the like, and any shape can be used as long as it can be left standing. The fineness of the elastic fiber is preferably 11 to 520 dtex, and more preferably 17 to 155 dtex. Here, the fineness of the elastic fiber means the fineness of the winding package display before the draft is applied.
[0009]
The inelastic fibers used in the production method of the present invention are not particularly limited, and synthetic fibers such as polyester fibers, polyamide fibers, acrylic fibers and polytrimethylene terephthalate fibers, semi-synthetic fibers such as acetate fibers, and cupra. Recycled fibers such as rayon, natural fibers such as cotton, hemp and wool, and fiber types such as aramid fibers and carbon fibers are used. The non-elastic fiber may be a short fiber or long fiber, a round cross section or a modified cross section (including hollow), and also a raw yarn, an undrawn yarn (including POY), a high-speed spun yarn (for example, spin take-up and spin draw) Take-up), thick yarn, design yarn and the like. These fibers may be yarns that are not subjected to any processing as they are, yarns obtained by drawing undrawn yarns or FOY (fully oriented yarns), false drawing and twisting methods, indentation methods, shaping methods or fluid jet methods. It may be a yarn that has been subjected to processing such as.
[0010]
Furthermore, it may be a composite yarn combining one or more of these fiber types and forms (using known composite means such as mixed spinning, entanglement, twisting, composite false twisting, fluid jet processing, etc.), or a plurality of the same or different inelastic fibers. You may use this and should just select according to the objective.
The non-elastic fiber is preferably 11 to 3300 dtex, and more preferably 22 to 940 dtex. The non-elastic fiber is preferably a multifilament fiber, and the single yarn fineness constituting the non-elastic fiber is preferably 20 dtex or less, and more preferably 7 dtex or less because it is easy to cover the elastic fiber with the non-elastic fiber. When making a fabric with a soft texture, it is preferable to use high-count inelastic fibers.
[0011]
In the present invention, the elastic composite yarn refers to a yarn in which an elastic fiber and an inelastic fiber are combined. For the composite, twisting, covering with a sheath core structure, assorted mixed fiber by fluid injection, fine spinning and twisting, etc. Is included. In addition, the elastic composite yarn is not only a composite yarn of elastic fiber and non-elastic fiber, but also another composite yarn or other number of fibers combined with the elastic composite yarn. May be combined. Further, the elastic composite yarns may be combined by means such as twisting, and the type and number of the counterpart yarns may be appropriately changed according to the use. The fineness of the elastic composite yarn is not particularly limited, but the total fineness is preferably 15 to 3800 dtex, and more preferably 40 to 1050 dtex.
Further, the weight mixing ratio of elastic fibers (elastic fibers after being drafted) in the elastic composite yarn is preferably 50% or less. If it exceeds 50%, the stretch rate and the recovery rate increase, but the characteristics of the composite partner material cannot be utilized, and the handleability may deteriorate. A more preferable weight mixing ratio is 3 to 30%.
[0012]
In the present invention, the elastic elastic composite yarn is produced by pulling an elastic fiber from a wound package of elastic fibers and supplying the elastic fiber to a yarn supplying device, and combining the elastic fiber fed from the yarn supplying device with an inelastic fiber. However, the yarn feeding device is provided with a variable speed feeding device, and the tensioning force (T) of the elastic fiber that is pulled out from the winding package and supplied to the feeding device by the feeding device. 1 ) And the tension (T) of the elastic fiber delivered from the delivery device 2 ) 0.05 ≦ T 1 / T 2 The tension of the elastic fiber is adjusted so that ≦ 0.7.
[0013]
The variable speed feeding device is installed in the yarn feeding device, and has a function of pulling out the elastic fiber from the wound package with a constant tension and feeding out the elastic fiber with a constant tension from the yarn feeding device. As such a device, for example, a device having a sensor capable of detecting the tension of an elastic fiber, a function of tensioning and feeding the elastic fiber, and a function of accurately feeding back the detected tension value of the elastic fiber to the feeding function. Is mentioned. The delivery device can be constituted by a cylindrical roller with several turns of elastic fibers, a roller with elastic fibers nipped, a belt, or the like. In addition, as means for applying tension to the elastic fiber before supplying the yarn to the feeding device, a washer-type tensor with a spring, a mechanism equipped with a mechanism for detecting tension and loading the tension, a bending angle using only a guide The thing which provides tension | tensile_strength only, or what combined these is mentioned.
[0014]
When a cylindrical roller is used as the feeding device, the rotational speed of the cylindrical roller for tension correction should be reduced if the tension signal from the sensor exceeds the set value, and if the tension signal from the sensor falls below the set value, it will rotate. Just increase the speed. Stepping motors, servo motors, etc. are used to drive the rollers. In addition, the sensor employs a method of transmitting electrical signals from strain gauges and piezoelectric elements to the motor, and a method of transmitting a slight physical displacement of the sensor position due to tension to the stepless transmission shaft and transmitting it to the motor. Is done. Although it is preferable that the response speed between the sensor and the motor is fast, there is no particular problem as long as it is usually 10 Hz or higher.
[0015]
As described above, the yarn feeding device used in the present invention is not a type in which the speed ratio between the two rollers is always driven and supplied at a constant ratio, but the tension change of the elastic fiber is caused by the above-described variable speed feeding device. This type can be absorbed and supplied. Specifically, there is a mechanism that detects tension fluctuations of the elastic fiber while the elastic fiber is pulled out from the wound package and supplied to the yarn feeding device, and instantaneously changes the yarn feeding roller speed to correct the tension. For example, it is possible to use a yarn feeding device in which a tension detecting unit and a take-up roll that can be changed instantaneously are interlocked, such as a tension control device such as BTSR or Memminger Airo.
[0016]
The tension (T) of the elastic fiber that is adjusted by the variable speed delivery device and is supplied from the wound package to the delivery device. 1 ) And the tension (T) of the elastic fiber delivered from the delivery device 2 ) Is 0.05 ≦ T 1 / T 2 ≦ 0.7, preferably 0.08 ≦ T 1 / T 2 ≦ 0.4. T 1 / T 2 Is less than 0.05, it responds sensitively to fluctuations in the unwinding tension from the wound package of elastic fibers, the elastic fibers loosen before the tension correction feeding device in the yarn feeding device, and the tension correction roller Problems such as winding of elastic fibers occur. T 1 / T 2 If the tension exceeds 0.7, the tension load on the tensioner, guide, etc. provided before feeding the feeding device for tension correction in the yarn feeding device becomes large, and the tension fluctuation also increases. It becomes difficult. T in particular 1 / T 2 When 1 exceeds 1, thread spots of elastic fibers occur.
[0017]
Next, the manufacturing method of the elastic composite yarn in the present invention will be specifically described.
When the elastic fiber and the non-elastic fiber are manufactured using a ring twisting machine, the elastic fiber wound package is allowed to stand on the ring twisting machine or in another place, and the elastic fiber drawn from the wound package with a constant tension is used. Then, the non-elastic fibers applied to the creel of the ring twisting machine are aligned and then twisted to obtain a stretchable composite yarn. The total number of twists at this time is generally 2500 to 20000 as a twist coefficient, and preferably 4000 to 15000. If the twist coefficient is less than 2500, the degree of entanglement between the elastic fiber and the non-elastic fiber is weak, so that slip-in is likely to occur, and phenomena such as a blind defect that the elastic fiber floats on the fabric are likely to occur. On the other hand, if the twisting coefficient exceeds 20000, the twisting is too strong, so that double twisting occurs, the fabric quality is likely to deteriorate, and the stretchability is hardly exhibited. The twist coefficient is a value obtained by multiplying the square root of the decitex fineness of the stretchable composite yarn by the number of twists per meter.
[0018]
As the twisting means, in addition to the above ring twisting machine, for example, a double twister, an Italian twisting machine, a twisting machine, or the like can be used. In the case of twisting, it can be made in one step, and in the case of increasing the number of twists, it is possible to have two steps. In the case of one step, the necessary number of twists may be twisted with a ring twisting machine or the like, and in the case of two steps, both elastic fibers and non-elastic fibers are preliminarily used, for example, with a ring twisting machine or the like. What is necessary is just to twist by (20-300 T / m) and then twist by a double twister etc. Moreover, the process of aligning by means, such as a composite false twist, may be individual or combined, and then twisted. Further, the non-elastic fiber may be aligned with the elastic fiber in an untwisted state, subjected to a fluid entanglement process such as air, and then twisted with a double twister or the like.
[0019]
When using an air entanglement device, it may be attached to the process of aligning elastic fibers and non-elastic fibers. Generally, it is attached to a rewinder or a twister, and immediately after the both are aligned, the air entanglement device is passed through, It is possible to give entanglement points to inelastic fibers. When air entanglement treatment is performed by aligning elastic fibers and non-elastic fibers, the non-elastic fibers may be fed with up to 5% overfeed or may be entangled with tension. .
After the elastic fiber and the non-elastic fiber are aligned, the air entanglement process is performed to produce the stretchable composite yarn. The multifilament type non-elastic fiber with a smaller single yarn fineness is elastic fiber even if the air pressure is set lower. The entangled state of the compressor is improved, the damage given to the non-elastic fiber is reduced, and it is also preferable from the economic aspect such as saving of the electricity bill of the compressor that generates compressed air.
[0020]
An air entanglement device is one in which compressed air is injected into a tunnel from one or several places in a tornell shape, and yarns are opened and entangled to form entanglement points between elastic fibers and inelastic fibers. It is called by names such as racer nozzles and entangled nozzles. Such air entanglement devices are commercially available from Awa Spindle, Toray Precision, Hebaline, and the like. The pressure of the compressed air supplied to these entanglement devices needs to be changed depending on the yarn type, the winding speed, etc., but is usually 29 to 590 kPa, preferably 49 to 340 kPa, and causes damage such as fluff to non-elastic fibers. The lower pressure that is not applied is better, but it is necessary to set the pressure at which confounding is appropriately applied.
[0021]
When the winding speed is slow, the pressure of the compressed air may be lowered, and when the winding speed is fast, the pressure may be increased. The winding speed is 10 to 300 m / min for the type that winds up with a sweet twist, and 100 to 800 m / min for the type that is wound without twisting, depending on the type of winding machine. Commonly used. Furthermore, when the number of inelastic fiber filaments is large or the yarn has a higher elongation, the compressed air can be entangled at a lower pressure.
The number of entanglements is related to the process performance in the next process.The higher the number of entanglements, the better the performance of the next process, but the quality of the yarn such as fluff decreases, the threads are too tight, and the entangled and unentangled parts Since the difference in the degree of convergence sometimes becomes a defect called irritation appearing on the fabric, it is preferably set to an appropriate range. Usually, the number of entanglements is preferably 10 / m to 100 / m, and 20 The range of / m-60 pieces / m is more preferable. This number of entanglements has the same meaning as JIS-L-1013 (1999) degree of entanglement.
[0022]
When the elastic composite yarn is a covering yarn having a sheath core structure, it can be obtained with a covering machine or a type of twisting machine (double twister or the like) equipped with a hollow spindle. For example, an elastic fiber managed with a constant tension may be fed into a hollow spindle through a guide, an inelastic fiber may be wound around the elastic fiber, and winding may be performed.
When the elastic composite yarn is an air-mixed yarn, the elastic fiber and the non-elastic fiber managed at a constant tension may be aligned and air entangled with an interlacer nozzle to be wound. It is preferable to overfeed. In the case of air mixed fiber, there are cases where the winding speed is as high as about 800 m / min. In such a case, in the conventional cradle method, the elastic fiber swings and the elastic fiber after the combined yarn is The mixed fiber state, so-called coverage, tends to be non-uniform, but with the yarn feeding method of the present invention, the coverage of the elastic fiber can be made uniform and good, and it is positioned at the center part after the combined yarn. It is valid. When air-mixing, the non-elastic fiber is up to + 5% when the yarn is crimped yarn such as false twisted yarn, and up to + 3% when the non-elastic fiber is unprocessed. Although it is preferable to feed, it is not restricted to this.
[0023]
When producing a stretchable composite yarn on false twisting on a false twisting machine, non-elastic fibers and elastic fibers may be simultaneously inserted into the false twisting zone. May be combined. The inelastic fiber used for false twisting may be an undrawn yarn, a semi-drawn yarn or a drawn yarn, but an undrawn yarn or a semi-drawn yarn is preferred from the viewpoint of production efficiency. The air entanglement device is preferably provided before the false twist zone or before winding.
Furthermore, when the stretchable composite yarn is a fine spinning / twisting yarn, an apparatus that can supply elastic fibers supplied at the time of fine spinning at a constant tension may be used.
In addition to the above, for example, a rapier room, an air jet room, a water jet room, etc., supply non-elastic fibers and elastic fibers managed at a constant tension to the weft flying nozzles to fly the wefts into the warp opening. It is possible to obtain a woven fabric, or it can be used as part of a warp. Furthermore, it can be used for knitting using machines such as a circular knitting machine, a warp knitting machine, and a flat knitting machine. In addition, it can also be used for knitting and knitting machines that use non-clothing materials such as industrial materials.
[0024]
In the present invention, the tension of the elastic fiber when producing the stretchable composite yarn may be determined from the stress elongation curve of the elastic fiber from the wound package to obtain a desired stretch characteristic. Generally, an elastic fiber is combined with other fibers in a state where the elastic fiber is pulled 1.5 to 4 times the length in an unloaded state.
In order to improve the handleability of the stretchable composite yarn, it may be subjected to heat setting at a temperature of about 70 to 90 ° C. for 20 to 60 minutes by a method such as a twist set steam setting after the composite. Moreover, when the torque of the composite yarn is large, the heat setting may be repeated twice at a temperature of about 70 to 90 ° C. for 20 to 30 minutes.
[0025]
If the non-elastic fiber used for the stretchable composite yarn is false twisted yarn, the twist direction during compounding such as doubling and covering is different from the false twist direction of the false elastic yarn. However, the twist direction and the number of twists at the time of compounding may be determined according to the necessity of setting a torque stop, the handleability of the stretchable composite yarn, the appearance and texture of the fabric, and the like. Further, when the inelastic fiber is a spun yarn, it is preferable to obtain a high stretch property by twisting or covering in a direction different from the twisted direction of the spun yarn. It is preferable from the viewpoint of yarn strength to set the number not exceeding the number, but if a plurality of spun yarns are used, the number of spinning twists can be exceeded, and it may be determined appropriately according to the application.
[0026]
【Example】
Hereinafter, the present invention will be described in detail by way of examples.
In the present invention, the fineness of the inelastic fiber was measured according to JIS-L-1013 (1981). Further, the fineness of the elastic fiber is determined by measuring the yarn length (L: unit m) by hanging the elastic fiber under no load in the standard atmosphere and measuring its weight (W: unit g). ) Is calculated by the formula, T = (W / L) × 10000, and this is repeated 30 times to obtain the average value as the fineness. The length of the yarn length L in the measurement of the fineness of the elastic fiber is not particularly limited, but in order to obtain a numerical value with high accuracy, it is preferable that the length is such that the elongation due to the self-weight effect of the elastic fiber is not affected. In the case of about 22 decitex to 78 decitex, the yarn length L is preferably about 1 m. Moreover, the draft of an elastic fiber means the expansion | extension magnification with respect to the length in an unloaded state of an elastic fiber.
[0027]
Furthermore, each evaluation in the examples was measured and evaluated by the following methods.
(1) Growth rate, recovery rate
According to JIS-L-1096 (1999) B-1 method (constant load method), the elongation rate and recovery rate of the woven fabric were determined. The sample was collected at the center of the warp of the woven fabric under each condition in the fabric width direction.
Note that the difference between the maximum value and the minimum value of the average value for each measurement point is regarded as a variation in the elongation rate and the recovery rate, and a difference exceeding 10% is regarded as a problem.
(2) Textile quality
Five people who have been engaged in the weaving business for more than five years spread the fabric in a stationary state, and the quality of the fabric was evaluated according to the following evaluation criteria (W0 to W4) by the visual sense of each person, and expressed as the average of the five people. .
W0 to W2 are acceptable. Moreover, in the following evaluation, the shaving-like sink refers to fineness spots and twisted spots of the composite yarn resulting from the contraction spots of the elastic fibers, and means that stripes are formed on the surface of the fabric. Pulling occurs when the elastic fiber is more tensioned than the normal part, and it means that the thread in the fabric is suspended as if it is pulled more strongly than the other part. It means that it is different, has streaks, and has a wavy shape on the fabric surface.
W0: The surface of the woven fabric has no defects such as shaving sink marks and pulling, the warp or weft is in a uniform state, and has an elegant appearance.
W1: It has a refined appearance, although some sink marks and pulling are seen.
W2: It has a surface state that can be said to have neither a sink mark nor a pull.
W3: Slightly sink marks and pulling.
W4: There are sink marks and pulling.
[0028]
Example 1
Polyester fiber (manufactured by Asahi Kasei Co., Ltd.) 34 dtex / 18f glued yarn is used for the warp, and the weft yarn is polyurethane-based elastic fiber (trade name Roika made by Asahi Kasei Co., Ltd.) 22 decitex and polyester fiber (non-elastic fiber) Asahi Kasei Co., Ltd.) A fabric was produced using the elastic composite yarn obtained by the production method of the present invention consisting of 34 dtex / 18f.
The elastic composite yarn is composed of elastic fiber tension (T 1 ) 0.6 cN / yarn, yarn feeding tension (T 2 ) Is 4.0 cN / yarn and T 1 / T 2 = 0.15, the non-elastic fiber feeding tension is set to 0.08 cN / dtex, and the elastic fiber and the non-elastic fiber are aligned, and a Pernwinder (Murata Machinery Co., Ltd., type 303-II ) At a winding speed of 550 m / min, and combined with an interlacer nozzle (manufactured by Toray Precision Co., Ltd., type PC220) at a pressure of 221 kPa while being entangled. A tension control device (manufactured by BTSR, model KTF / 25HP) was used as the elastic fiber yarn feeding device. Subsequently, it was obtained by twisting in the Z direction using a double twister (Murata Kikai Co., Ltd., type 310F) at a set spindle rotation speed of 12000 rpm and a set twist number of 1500 T / m.
[0029]
This stretchable composite yarn was passed through a 190 cm wide air jet loom (manufactured by Tsudakoma Kogyo Co., Ltd., type ZA-209, using only one pick), with a density of 72 wings / 3.79 cm (2 pcs per wing), threading A plain weave fabric was produced with a width of 182.4 cm, a loom rotation speed of 450 rpm and a weft driving density of 110 yarns / 2.54 cm, and this raw machinery was subjected to a dyeing process of a regular method, and warp density of 157 yarns / 2.54 cm, weft yarn density of 121 yarns. /2.54 cm fabric was obtained.
The resulting woven fabric has an average elongation of 40.1% and a recovery rate of 91.0%, and the elongation and recovery rate in the weft direction have little variation as shown in Table 1, and the surface of the fabric. The state had a fine texture and was a twisted yarn touch but had a uniform surface. The quality of the woven fabric was a good woven fabric with no sink marks or pulling.
[0030]
Example 2
In Example 1, tension of elastic fiber (T in front of the feeding device of the yarn feeding device) 1 ) 0.22 cN / yarn, yarn feed tension after elastic fiber feeding device (T 2 ) Is 4.0 cN / yarn and T 1 / T 2 = A woven fabric was obtained in the same manner as in Example 1 except that the condition was 0.055.
As shown in Table 1, the obtained woven fabric had little variation in the elongation and recovery rate, and the quality of the woven fabric was a good woven fabric with no dent marks or pulling.
[0031]
Example 3
In Example 1, tension of elastic fiber (T 1 ) 2.7 cN / yarn, yarn feeding tension after elastic fiber feeding device (T 2 ) Is 4.0 cN / yarn and T 1 / T 2 = A woven fabric was obtained in the same manner as in Example 1 except that the condition was 0.68.
As shown in Table 1, the obtained woven fabric had little variation in the elongation and recovery rate, and the quality of the woven fabric was a good woven fabric with no dent marks or pulling.
[0032]
Comparative Example 1
In Example 1, tension of elastic fiber (T in front of the feeding device of the yarn feeding device) 1 ) 0.15 cN / yarn, yarn feeding tension after elastic fiber feeding device (T 2 ) Is 4.0 cN / yarn and T 1 / T 2 = A woven fabric was obtained in the same manner as in Example 1 except that the condition was 0.03.
As shown in Table 1, the obtained woven fabric had a variation in the recovery rate, and the quality of the woven fabric was found to have a shaved sink and slightly strong pulling.
[0033]
Comparative Example 2
In Example 1, tension of elastic fiber (T 1 ) 3.3 cN / yarn, yarn feeding tension after elastic fiber feeding device (T 2 ) Is 4.0 cN / yarn and T 1 / T 2 = A fabric was obtained in the same manner as in Example 1 except that the condition was 0.83.
As shown in Table 1, the obtained woven fabric had variations in the recovery rate, and the quality of the woven fabric was found to be strongly crushed and to be pulled.
[0034]
Example 4
Cellulose multifilament fibers (trade name Cupra Bemberg, manufactured by Asahi Kasei Co., Ltd.) 84 decitex / 45f are used as warps, polyurethane elastic fibers (trade name Roika, manufactured by Asahi Kasei Co., Ltd.) 22 decitex as elastic fibers, and non-elastic fibers A stretchable composite yarn obtained by the production method of the present invention consisting of cellulose multifilament fiber (trade name Cupra Bemberg, manufactured by Asahi Kasei Co., Ltd.) 84 dtex / 45f was used to produce a woven fabric.
This stretchable composite yarn is composed of elastic fiber tension (T 1 ) 0.6 cN / yarn, yarn feeding tension (T 2 ) Is 4.0 cN / yarn and T 1 / T 2 = 0.15, the non-elastic fiber feeding tension is set to 0.08 cN / dtex, and the elastic fiber and the non-elastic fiber are aligned, and a Pernwinder (Murata Machinery Co., Ltd., type 303-II ) At a winding speed of 500 m / min and combined with an interlacer nozzle (manufactured by Toray Precision Co., Ltd., type PC220) at a pressure of 147 kPa while confounding. A tension control device (manufactured by BTSR, model KTF / 25HP) was used as the elastic fiber yarn feeding device. Subsequently, it was obtained by twisting in the Z direction using a double twister (Murata Kikai Co., Ltd., type 310F) at a set spindle rotation speed of 10000 rpm and a set twist number of 1000 T / m.
[0035]
The elastic composite yarn is an elastic fiber having the same thickness (fineness) and has nine weights (10 g, 30 g, 50 g, 100 g, 150 g, 200 g, 300 g, 400 g) in which the remaining yarn amount of the wound package is 10 g to 500 g. , 500 g) of elastic fiber wound packages were prepared, and 100 g of each was produced using each elastic fiber.
These stretch composite yarns are continuously connected, marked so that the joints can be seen and used for wefts, and a 170cm wide air jet loom (made by Tsudakoma Kogyo Co., Ltd., type ZA-103, only one pick is used) Thus, a plain weaving machine was manufactured at a cocoon density of 67 wings / 3.79 cm (with two wings), a threading width of 168.6 cm, a loom rotation speed of 500 rpm, and a weft driving density of 84 pcs / 2.54 cm. This raw machine was subjected to a dyeing process of a standard method to obtain a woven fabric having a warp density of 131 / 2.54 cm and a weft density of 85 / 2.54 cm.
The resulting fabric had an average elongation of 28.9% and a recovery rate of 78.5%. The elongation and recovery rates in the weft direction are shown in Table 1. Despite the use of the package, there is little variation, and the surface condition of the fabric is fine, but it has a uniform surface, and the quality of the fabric shows almost no dent marks or pulling. It was an unsatisfactory good fabric.
[0036]
Comparative Example 3
In Example 4, a woven fabric was obtained in the same manner as in Example 4 except that the elastic fiber was fed in a cradle type. That is, the elastic fiber wound package is attached to the cradle and pressed against the driving roller, the rotational speed of the driving roller is set so that the draft is 3.0, and the PAN WINDER (Murata Machinery Co., Ltd., type 303-II) is The elastic fiber and the non-elastic fiber were drawn together at a winding speed of 500 m / min, and combined with an interlacer nozzle while entangled at a pressure of 147 kPa. Subsequently, after twisting with a double twister, the same procedure as in Example 1 was performed to obtain a woven fabric having a warp density of 131 yarns / 2.54 cm and a weft density of 85 yarns / 2.54 cm.
As shown in Table 1, the obtained woven fabric had a variation in the recovery rate, and the quality of the woven fabric was a woven fabric in which shaved sink marks and pulling were slightly observed.
[0037]
Comparative Example 4
In Example 4, a woven fabric was obtained in the same manner as in Example 4 except that the elastic fiber was fed by the rolling method provided in a normal covering machine. That is, an elastic fiber wound package was placed between driving rollers rotating at the same speed, and a covering yarn was obtained in which inelastic fibers were swirled around elastic fibers pulled out from the elastic fiber wound package while being drafted. . Thereafter, the woven fabric was finished in the same manner as in Example 4 to obtain a woven fabric having a warp density of 132 / 2.54 cm and a weft density of 85 / 2.54 cm.
As shown in Table 1, the obtained woven fabric was a woven fabric in which the recovery rate varied and the surface of the woven fabric had slight sink marks and pulling.
[0038]
Example 5
Polyester multifilament fiber (Asahi Kasei Co., Ltd.) 170 decitex / 72f 800T / m (Z-twisted) twisted yarn is used for the warp, polyurethane elastic fiber (trade name Roika made by Asahi Kasei Co., Ltd.) 44 decitex is used as the weft, A woven fabric was produced using the elastic composite yarn obtained by the production method of the present invention consisting of unstretched yarn of polyester multifilament fiber (manufactured by Asahi Kasei Co., Ltd.) 230 dtex / 48f as elastic fiber.
This stretchable composite yarn was produced as follows. First, using a belt nip twisting type false twisting machine (Murata Kikai Co., Ltd., type Mach 33H), a yarn speed of 500 m / min, a belt crossing angle of 110 degrees (number of false twists of about 2310 T / m), a draw ratio of 1 .402, VR (belt speed / yarn speed) 1.463, first heater temperature 220 ° C., one heater Z direction twisted false twisted, 167 dtex stretched false twisted yarn and left outside The elastic fiber 44 decitex is unwound from the wound package of elastic fiber, and the elastic fiber to which a constant tension is applied by a yarn feeder is applied to an interlacer nozzle (Hebaline, type HFP-P221) provided between the heater and the winding. They were inserted just before being inserted and wound at a winding feed rate of 5.00% while entangled at a pressure of 343 kPa.
[0039]
Tension of elastic fiber (T 1 ) 1.7 cN / yarn, yarn feeding tension after elastic fiber feeding device (T 2 ) Is 7.8 cN / yarn and T 1 / T 2 = 0.22, the non-elastic fiber feed tension is set to 0.08 cN / dtex, the elastic fiber and the non-elastic fiber are aligned, and the elastic fiber feed device has a tension control device (BTSR). Model KTF / 25HP) manufactured by the company was used. Subsequently, using a double twister (Murata Kikai Co., Ltd., type 310F), an elastic composite yarn twisted in the Z direction at a set spindle rotation speed of 8000 rpm and a set twist number of 700 T / m was obtained.
In addition, the elastic composite yarn is the same as in Example 4, and the remaining elastic fibers have 9 kinds of weights (10 g, 30 g, 50 g, 100 g, 150 g, 200 g, 300 g, 400 g, 500 g). A wound package of elastic fibers was prepared, and 120 g each was produced using each elastic fiber.
[0040]
Next, these stretchable composite yarns are continuously connected, marked so that the joints can be seen and used for wefts, 190cm wide air jet loom (Tsukoma Kogyo Co., Ltd., type ZA-209, only one pick used) ) Was used to produce a twill woven fabric with a cocoon density of 56 wings / 3.79 cm (with two wings), a threading width of 184.6 cm, a loom rotation speed of 460 rpm, and a weft driving density of 78 pcs / 2.54 cm. This raw machine was subjected to a dyeing process of a standard method to obtain a woven fabric having a warp density of 106 / 2.54 cm and a weft density of 82 / 2.54 cm.
The resulting woven fabric has an average elongation of 25.2% and a recovery rate of 93.7%. As shown in Table 1, the elongation rate and the recovery rate in the weft direction are those using the nine types of elastic fibers. However, the woven fabric had a uniform surface state, and the quality of the woven fabric was a good woven fabric with no sink marks or pulling.
[0041]
Comparative Example 5
In Example 5, the elastic fiber winding package was attached to the cradle and pressed against the driving roller in the same manner as in Example 5 except that the elastic fiber yarn feeding method was cradle type, and the draft was 3.0. Thus, the rotational speed of the drive roller was set, elastic fibers were supplied, and the drawn yarn was combined with a drawn yarn using a false twisting machine, and then this yarn was twisted with a double twister. Thereafter, a green machine was manufactured and processed in the same manner as in Example 3 to obtain a woven fabric having a warp density of 106 / 2.54 cm and a weft density of 82 / 2.54 cm.
As shown in Table 1, the obtained woven fabric had variations in elongation and recovery rate, and the quality of the woven fabric was a woven fabric in which crushed sink marks and pulling were observed.
[0042]
[Table 1]
In addition, * mark in Table 1 shows that the value is out of pass or there is a problem.
[0043]
【The invention's effect】
According to the method for producing a stretchable composite yarn of the present invention, the elastic fiber is controlled by tension and supplied, so that the physical property difference between the inner and outer layers of the elastic fiber can be eliminated and the composite can be stably combined with the inelastic fiber. it can. Therefore, by using this stretchable composite yarn, the stretch characteristics and the mixed state of non-elastic fibers become uniform, there is no occurrence of crushed sink marks or pulling, and the elastic fibers are uniformly distributed in the stretchable composite yarn. It is possible to prevent the occurrence of irregularities due to poor coating on the elastic fiber due to being not located on the center side, and it is possible to provide a fabric having stable stretch characteristics and quality. In addition, according to the production method of the present invention, the elastic composite yarn can be produced at high speed, the quality is stabilized, the labor of managing the inner and outer layers of the elastic fiber wound package is saved, and the transfer tail is used. Thus, continuous processing can be performed without stopping the machine, and a stretchable composite yarn can be easily obtained without much capital investment.
Claims (4)
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| JP2001129708A JP4563611B2 (en) | 2001-04-26 | 2001-04-26 | Method for producing elastic composite yarn |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10121342A (en) * | 1996-10-09 | 1998-05-12 | Teijin Ltd | Feeding of elastic yarn |
| JPH10259535A (en) * | 1997-03-18 | 1998-09-29 | Teijin Ltd | Yarn feeding of elastic yarn |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10121342A (en) * | 1996-10-09 | 1998-05-12 | Teijin Ltd | Feeding of elastic yarn |
| JPH10259535A (en) * | 1997-03-18 | 1998-09-29 | Teijin Ltd | Yarn feeding of elastic yarn |
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