JP2004124315A

JP2004124315A - Moisture-absorbing and heat-generating highly stretchable knitted fabric and method for producing the same

Info

Publication number: JP2004124315A
Application number: JP2002291492A
Authority: JP
Inventors: Ryoji Nakamura; 中村　良司; Futoshi Ishimaru; 石丸　太; Akihisa Nakagawa; 中川　明久
Original assignee: Toyobo Co Ltd
Current assignee: Toyobo Co Ltd
Priority date: 2002-10-03
Filing date: 2002-10-03
Publication date: 2004-04-22
Anticipated expiration: 2022-10-03
Also published as: JP3838430B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a knitted fabric having high moisture-absorbing and heat-generating properties and excellent in heat retaining properties and stretchability. <P>SOLUTION: The highly stretchable knitted fabric is composed of an elastic yarn containing highly hygroscopic organic fine particles and a non-elastic fiber. In the knitted fabric, an elongation recovery ratio under constant load is ≥50% when an elongation ratio under a constant load is ≥50% and a rise in surface temperature of the knitted fabric at the time of moisture absorption is ≥3°C. The method for producing the moisture-absorbing and heat-generating highly stretchable knitted fabric comprises conjugating an elastic yarn containing the highly hygroscopic organic fine particles with a synthetic filament yarn while drawing the elastic yarn and optionally interknitting with other filament yarn by a circular knitting machine. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は吸放湿性に優れ、吸湿時に発熱加温効果があり、加湿停止後の放熱速度が遅く、ウォームアップを助成し、快適性に優れた高伸縮性編地に関する。
【０００２】
【従来の技術】
近年、繊維に高吸湿性を付与し、繊維が吸湿する際の吸湿発熱を利用して保温性を高める試みがなされている。例えば、特許文献１には、シリカゲル、シリカアルミナ系の乾燥剤やモレキュラーシーブスなどのセラミック系の乾燥剤などの微粉末を各種繊維材料に混合したものが挙げられ、具体的には、親水性基がカルボン酸ソーダとされたアクリル酸系吸放湿吸水発熱性繊維が挙げられている。しかしながら、無機系の乾燥剤などの微粉末では、高吸湿性を付与するためには、多量の微粉末を混合する必要があるとともに、紡糸が非常に困難であり、また、アクリル酸系吸放湿吸水発熱性繊維では、製造工程が複雑で製造しにくいのみならず、かつ得られる繊維は強度、伸度が著しく低い欠点があった。したがって、中綿や不織布としての使用には問題がなくても、編物や織物としての使用には問題があり、吸湿発熱による保温性に優れ、かつ伸縮性にも優れた編地の提供は困難であった。
【０００３】
【特許文献１】
特公平７−５９７６２号公報（段落００１５）
【０００４】
【発明が解決しようとする課題】
本発明は、吸湿発熱性が高く、この発熱により保温性に優れ、かつ伸縮性にも優れた編地を提供しようとするものであり、特に、吸湿による加温効果に優れ、スポーツなどの運動時のウォームアップ効果に優れた編地を提供しようとするものである。
【０００５】
【課題を解決するための手段】
これらの状況に鑑み、検討の結果、本発明に至った。即ち本発明は下記の構成を採用するものである。
１．高吸湿性有機微粒子を含有する弾性糸と非弾性繊維とより構成された高伸縮性編地であって、定荷重伸長率が５０％以上で定荷重伸長回復率が５０％以上であり、かつ吸湿時の編地の表面温度上昇が３℃以上であることを特徴とする吸湿発熱する高伸縮性編地。
２．高吸湿性有機微粒子が、アクリロニトリルを５０質量％以上有するアクリロニトリル系重合体にヒドラジン、ジビニルベンゼンまたはトリアリルイソシアネート処理により架橋構造を導入し、残存しているニトリル基を加水分解により塩型カルボキシル基に化学変換せしめたものであり、該有機微粒子を０．２〜５０質量％含有した弾性糸が構成編地の１０質量％以上複合されていることを特徴とする第１に記載の吸湿発熱する高伸縮性編地。
３．編地の表裏表面は非弾性繊維で覆われ、該非弾性繊維表面には高吸湿性有機微粒子が実質的に存在しないことを特徴とする第１又は２に記載の吸湿発熱する高伸縮性編地。
４．弾性糸がポリウレタン繊維であることを特徴とする第１〜３に記載の吸湿発熱する高伸縮性編地。
５．高吸湿性有機微粒子を含有する弾性糸をドラフトしながら合成フィラメント糸と複合した後、該複合糸単独もしくは他フィラメント糸と丸編み機で交編することを特徴とする吸湿発熱する高伸縮性編地の製造方法。
６．高吸湿性有機微粒子を含有する弾性糸のベアー糸を後筬に、合成フィラメント糸を最前筬に用いて、経編み機で編成することを特徴とする吸湿発熱する高伸縮性編地の製造方法。
【０００６】
【発明の実施の形態】
本発明における編地を構成する弾性糸とは、ポリウレタン系合成繊維、ポリエーテルエステル系合成繊維からなる糸を意味する。伸縮回復性が優れることから、ポリウレタン系合成繊維が好ましい。本発明においては、弾性糸は原料樹脂中に吸湿発熱性を有する高吸湿性有機微粒子を含有するものである。
【０００７】
弾性糸中に含有している高吸湿性有機微粒子は、架橋構造を有し、かつ親水性基を有する高吸湿性の有機性微粒子である。吸湿率（２０℃、６５％ＲＨ）は２５％以上が好ましく、より好ましくは３０％以上、さらに好ましくは４０％以上である。粒子径は２μｍ以下が、混和性及び紡糸性の点で好ましい。
本発明における高吸湿性有機微粒子は、分子間架橋構造を有し、かつ親水性基を有するため、弾性樹脂との混和性に優れ、かつ高度に吸湿しても体積の変化が小さいが、吸湿によって体積が膨張しても弾性樹脂が体積膨張を吸収できるので安定な高吸湿性の弾性糸となる。
親水性基としては、アルカリ金属、アルカリ土類金属、アンモニウムなどの塩型であり、塩型カルボキシル基、塩型スルホン酸基、塩型リン酸基、塩型ホスホン酸基などである。
【０００８】
本発明における高吸湿性有機微粒子の具体例としては、例えば以下のものが挙げられる。
アクリロニトリルを５０質量％以上含むアクリロニトリル系重合体にヒドラジン、ジビニルベンゼンまたはトリアリルイソシアネート処理により架橋構造を導入し、残存しているニトリル基を加水分解により塩型カルボキシル基に化学変換せしめたものが挙げられる。
塩型カルボキシル基の有機微粒子中の量は、１．０ｍｍｏｌ／ｇ以上有することが好ましく、高濃度であることが好ましいが、製造上の限界から６．０ｍｍｏｌ／ｇ程度が好ましい。該有機微粒子の弾性糸中の含有量は、０．２〜５０質量％であることが好ましい。塩型カルボキシル基濃度（ｍｍｏｌ／ｇ）と粒子の含有量（質量％）の積が４０から８０であることが好ましい。
【０００９】
本発明の編地は、前記の弾性糸と非弾性繊維とより構成された高伸縮性編地であるが、本発明における非弾性繊維とは、羊毛、綿、絹等の天然繊維やナイロン、ポリエステル等の合成フィラメントで破断伸度が１００％未満の繊維である。非弾性糸は実質的に吸湿発熱性有機微粒子を含んでおらず、編地の表裏表面は非弾性繊維で覆われていることが好ましい。ここでいう実質的に吸湿性有機微粒子を含まないということは編地の吸湿率を左右する以上の粒子量を含まないことを意味し、多少であれば含んでいても差し支えない。
【００１０】
本発明の編地における弾性糸の混用率は、構成編地の２０質量％以上であることが吸湿加温効果を得る上で好ましく、着用時の心地よさを保つ上で５０質量％未満とすることが好ましい。本発明における弾性糸は、綿繊維や羊毛繊維に比べ、吸放湿速度が遅く吸湿到達レベルが高いため、結果として発熱、放熱がマイルドで長時間継続することに特徴があり、特に発汗停止後の繊維温度の低下速度が遅く、運動停止後の冷え感を抑止する効果がある。また塩型カルボキシル基は吸湿発熱効果のほかに、消臭、制菌抗菌、ｐＨ緩衝、制電などの各種効果をもたらし、ウォームアップスーツとして理想的な性能を備えた製品である。また陰干ししても菌が繁殖しないので水着としても好適である。
【００１１】
本発明の編地は、吸湿時の編地の表面温度上昇が３℃以上である。この吸湿時の発熱は、編地を７０℃で２時間乾燥後シリカゲルを入れたデシケーター中で８時間以上調温後、３２℃、７０％ＲＨに調整された雰囲気中で、サーモグラフィーで編地表面を５分間連続して表面温度を測定し、最大となる温度を計測し、３２℃との差異を上昇温度とする。この温度が３℃未満では体感効果がなく、上昇温度が高いほど好ましいが、おおよそ１０℃程度が性能の限界と考えられる。
【００１２】
編地の伸長特性は重要な用件であり、保温性を高め、できるだけ身体に密着し、かつ運動性を阻害しない衣料であるためには、編地は５０％以上の定荷重伸長率が必要であり、好ましくは定荷重伸長率が６０〜１００％の伸長性があることが望ましい。また、身体との密着性を保つことと、回復性に優れて見栄えを損なわないためには、定荷重伸長回復率が５０％以上の伸長回復性があることが望ましい。より好ましくは、６０〜９５％である。
【００１３】
弾性糸と非弾性繊維の混用は複合糸とした後、編地とする方法や弾性糸と非弾性糸とを交編とする方法を採用することができる。但し交編とする場合は編地表裏の表面に弾性糸が直接出ない工夫が好ましい。これは、吸湿により吸湿繊維表面がべたつくため、実質的に多量の水分を吸湿しない非弾性繊維でべたつき感を肌に感じさせないようにするためである。
【００１４】
複合糸とする方法としては、複合紡績糸やカバリング糸とする方法がある。複合紡績糸とする方法の具体例としては、非弾性繊維の精紡工程の粗糸ドラフト域に弾性糸を適当なドラフト倍率して供給してシースコア複合糸とする方法がある。カバリング糸とする方法の具体例としては、弾性糸を適当なドラフト倍率で供給して、その上に非弾性糸を巻回する方法等がある。前者の場合、非弾性繊維として羊毛、綿、麻及びポリエステル短繊維、ナイロン短繊維を用いることができる。後者の場合、絹、ポリエステルフィラメント糸、ナイロンフィラメント糸、綿及び羊毛の紡績糸を用いることができる。またポリエステルフィラメント糸、ナイロンフィラメント糸の場合は複合仮撚り加工糸としても使用可能である。
【００１５】
これらの複合糸は単独もしくは、他の繊維糸と交編して丸編み地として利用でき、丸編み地は比較的伸度を大きくすることの利点がある。組織は伸度が必要条件を満たせばとくに限定されない。
【００１６】
経編地とする場合は、特別で編み目を形成する非弾性フィラメント糸と供給する筬の後であればどの筬に弾性糸を用いても、弾性糸が非弾性フィラメント糸で包みこまれて編地となるため、弾性糸はベアーで用いることができる。この場合、非弾性糸は紡績糸を用いることもできるが、毛羽や風綿での操業性の低下を抑止するためには、フィラメント糸が好ましい。
【００１７】
【実施例】
以下、本発明を実施例によって詳述するが、本発明は、これらによって何ら限定されるものではない。なお、実施例中、単に部とあるのは質量部を意味する。［定荷重伸長率と定荷重伸長回復率の測定方法］
「風合い評価の標準化と解析」（日本繊維機械学会編集）の第ＩＶ章　「布の力学的特性の測定」に記載の方法に準拠して測定した。測定試料の大きさは幅２０ｃｍ、長さ５ｃｍであり、布帛の経方向、緯方向についてそれぞれ採取した。測定試料を長さ方向に４．００×１０ー３／ｓｅｃの一定速度で、最大荷重５００ｇｆ／ｃｍまで引張り、次いで変形回復過程に移り、最大荷重（５００ｇｆ／ｃｍ）時の伸長率を求めた。経方向と緯方向の平均値を伸長率とした。また、定荷重伸長回復率は、最大荷重での伸長率に対する除荷重により回復した伸長率の比率から求めた（除荷重により回復した伸長率÷最大荷重での伸長率×１００）。
【００１８】
［実施例１］
分子量１８００のポリオキシテトラメチレングリコール２００部とメチレン−ビス（４−フェニルイソシアネート）４５部を８０℃で３時間反応させ、両末端イソシアネート基の中間重合体を得た。中間重合体を４０℃まで冷却した後、Ｎ，Ｎ−ジメチルアセトアミド３７５部を加え１０℃まで冷却した。エチレンジアミン４．０部、ジエチルアミン０．４部をＮ，Ｎ−ジメチルアセトアミド１４７．６部に溶解したジエチルアミン溶液を用意し、高速攪拌されている中間重合体溶液にジエチルアミン溶液を一気に添加し、溶液濃度３２．２質量％、粘度２５００ポイズ（３０℃）のポリウレタン重合体溶液を得た。
得られたポリウレタン重合体溶液に、ｎ−ブチルアミン／Ｎ，Ｎ−ジメチルヒドラジン末端封鎖ポリマー４％、ベンゾトリアゾール系化合物、ヒンダードフェノール系化合物を添加混合した。
引続き、ポリウレタン重合体溶液に、平均粒径０．５μｍ（光散乱光度計で測定）、膨潤度８０％の高吸放湿性有機微粒子（アクリロニトリル、アクリル酸メチル、ｐ−スチレンスルホン酸ソーダを共重合した原料微粒子水分散体をヒドラジン架橋し、ＮａＯＨにて加水分解処理したもの。親水性基としてカルボン酸ソーダとスルホン酸ソーダを保有）を１３質量％添加混合し紡糸原液とした。
【００１９】
紡糸原液を脱法後、孔径０．５ｍｍの口金から吐出し、２３５℃の加熱空気を流した紡糸筒内に押し出し、油剤を５％ｏｍｆ付与して速度５５０ｍ／分で巻き取った。得られた糸条を４０℃で７２時間加熱処理し、４４ｄｔｅｘ、４フィラメントのポリウレタン弾性繊維を得た。
【００２０】
得られたポリウレタン弾性糸をバック筬に、カチオン常圧可染ポリエステルフィラメント糸５６デシテックス３６フィラメントをフロント筬に用いて２８ゲージのトリコット編み機でハーフ組織の経編地（弾性繊維の含有率は２５質量％）を得た。得られた経編地を、常法で精練、プレセット、常温染色、ファイナルセットをして、コース密度が１０２Ｃ／２．５４ｃｍ、　ウェール密度が６２Ｗ　／２．５４ｃｍ、目付が２００ｇ／ｍ^２の仕上げ編地を得た。この編地の伸長特性、吸湿発熱特性を表１に示した。
この編地を縫製して、レオタードとスパッツを作成し、冬季の体育館内でテニス選手の下着として着用したところ初期の肌寒さが感じられず、未着用時の約半分の１０分間のウォーミングアップで競技可能に体調になり、蒸れ感もないとの評価を得た。
【００２１】
［実施例２］
実施例１と同法で得た弾性糸７８デシテックスを３．３倍にドラフトしながら、ナイロン６フィラメント７７デシテックス２４フィラメントと引き揃え２，５００Ｔ／ｍで１段仮撚り加工をし、巻取り前でおおむね６０個／ｍのインターレースを入れて、巻き取った。
該仮撚り複合糸を用いて２８Ｇの丸編み機で天竺組織の編地を得た。得られた編地を常法で精練、染色、セットして、目付が１５０ｇ／ｍ^２で弾性糸の含有率が２５質量％の仕上げ編地とした。この編地の伸長特性、吸湿発熱特性を表１に示した。また、仕上げ編地から、タイツを縫製した。このタイツを陸上選手に着用してもらい、ウォーミング時に着用感を評価してもらった結果は、体温の上昇がはやく、蒸れ感もないとの評価であった。
【００２２】
［比較例１］
高吸湿有機微粒子を含有しないこと以外は実施例２と同法でタイツを作成した。この編地の伸長特性、吸湿発熱特性を表１に示した。また実施例２と同法で評価した結果、ウォーミングアップに急激な運動が必要で、発汗とともに蒸れ感を感じ、運動をやめ、しばらくするとひやり感も感じたとの評価であった。
【００２３】
【表１】

【００２４】
【発明の効果】
本発明によれば、吸湿性に優れるばかりか、吸湿初期に発熱加温効果があり、ウォーミング効果を増進させ、発汗停止後の急冷によるべとつき感もない快適性に富んだウォーミングアップスーツに最適な編地であり、加えて、抗菌性、消臭性、ｐＨ緩衝性等の衛生機能や制電性能をも兼ね備えた高伸縮編地を提供することができる。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a highly stretchable knitted fabric which is excellent in moisture absorption and desorption, has a heating effect upon moisture absorption, has a low heat radiation rate after stopping humidification, promotes warm-up, and is excellent in comfort.
[0002]
[Prior art]
In recent years, attempts have been made to impart high hygroscopicity to fibers and to enhance heat retention by utilizing the heat generated by moisture absorption when the fibers absorb moisture. For example, Patent Document 1 discloses a mixture of fine powders such as silica gel, silica alumina-based desiccant and ceramic-based desiccant such as molecular sieves mixed with various fiber materials. Acrylic acid-based moisture-absorbing, moisture-absorbing, and heat-generating fibers in which sodium carboxylate is used. However, with a fine powder such as an inorganic desiccant, it is necessary to mix a large amount of the fine powder in order to impart high hygroscopicity, and spinning is very difficult. The heat-absorbing and heat-absorbing fiber has disadvantages in that the production process is complicated and difficult to produce, and the resulting fiber has extremely low strength and elongation. Therefore, even if there is no problem in use as a batting or a nonwoven fabric, there is a problem in use as a knitted fabric or a woven fabric, and it is difficult to provide a knitted fabric excellent in heat retention due to moisture absorption and heat generation, and also excellent in elasticity. there were.
[0003]
[Patent Document 1]
Japanese Patent Publication No. 7-59762 (paragraph 0015)
[0004]
[Problems to be solved by the invention]
An object of the present invention is to provide a knitted fabric which has a high moisture-absorbing heat-generating property, is excellent in heat retention by this heat generation, and is also excellent in elasticity. It is intended to provide a knitted fabric excellent in warm-up effect at the time.
[0005]
[Means for Solving the Problems]
In view of these circumstances, as a result of investigation, the present invention has been reached. That is, the present invention employs the following configuration.
1. A highly elastic knitted fabric composed of an elastic yarn containing highly hygroscopic organic fine particles and an inelastic fiber, having a constant load elongation of 50% or more, a constant load elongation recovery of 50% or more, and A highly stretchable knitted fabric which absorbs and generates heat, wherein a rise in surface temperature of the knitted fabric during moisture absorption is 3 ° C or more.
2. Highly hygroscopic organic fine particles introduce a crosslinked structure into acrylonitrile-based polymer having acrylonitrile of 50% by mass or more by hydrazine, divinylbenzene or triallyl isocyanate treatment, and hydrolyze the remaining nitrile groups into salt-type carboxyl groups. 2. The high moisture-absorbing and heat-generating device according to claim 1, wherein an elastic yarn containing 0.2 to 50% by mass of the organic fine particles is compounded in an amount of 10% by mass or more of the knitted fabric. Stretch knitted fabric.
3. 3. The highly elastic knitted fabric which absorbs and generates moisture as described in 1 or 2, wherein the front and back surfaces of the knitted fabric are covered with inelastic fibers, and the surface of the inelastic fibers is substantially free of highly hygroscopic organic fine particles. .
4. 4. The highly stretchable knitted fabric which absorbs and generates heat according to any one of the first to third aspects, wherein the elastic yarn is a polyurethane fiber.
5. A highly stretchable knitted fabric that absorbs and generates heat by combining an elastic yarn containing highly hygroscopic organic fine particles with a synthetic filament yarn while drafting and then knitting the composite yarn alone or another filament yarn with a circular knitting machine. Manufacturing method.
6. A method for producing a highly stretchable knitted fabric which generates heat and absorbs moisture, comprising knitting with a warp knitting machine, using a bare yarn of elastic yarn containing highly hygroscopic organic fine particles as a rear reed and a synthetic filament yarn as a front reed.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
The elastic yarn constituting the knitted fabric in the present invention means a yarn composed of a polyurethane synthetic fiber and a polyetherester synthetic fiber. Polyurethane-based synthetic fibers are preferred because of their excellent elastic recovery properties. In the present invention, the elastic yarn contains highly hygroscopic organic fine particles having hygroscopic heat generation property in the raw material resin.
[0007]
The highly hygroscopic organic fine particles contained in the elastic yarn are highly hygroscopic organic fine particles having a crosslinked structure and having a hydrophilic group. The moisture absorption (20 ° C., 65% RH) is preferably 25% or more, more preferably 30% or more, and further preferably 40% or more. The particle size is preferably 2 μm or less from the viewpoint of miscibility and spinnability.
The highly hygroscopic organic fine particles of the present invention have an intermolecular cross-linking structure and have a hydrophilic group, so that they have excellent miscibility with an elastic resin, and have a small change in volume even if they absorb moisture to a high degree. As a result, even if the volume expands, the elastic resin can absorb the volume expansion, so that a stable highly hygroscopic elastic yarn can be obtained.
The hydrophilic group is in the form of a salt such as an alkali metal, an alkaline earth metal, or ammonium, and includes a salt-type carboxyl group, a salt-type sulfonic acid group, a salt-type phosphoric acid group, and a salt-type phosphonic acid group.
[0008]
Specific examples of the highly hygroscopic organic fine particles in the present invention include the following.
An acrylonitrile-based polymer containing 50% by mass or more of acrylonitrile, in which a crosslinked structure is introduced by treatment with hydrazine, divinylbenzene or triallyl isocyanate, and the remaining nitrile group is chemically converted to a salt-type carboxyl group by hydrolysis. Can be
The amount of the salt-type carboxyl group in the organic fine particles is preferably 1.0 mmol / g or more, and is preferably a high concentration, but is preferably about 6.0 mmol / g from the manufacturing limit. The content of the organic fine particles in the elastic yarn is preferably from 0.2 to 50% by mass. The product of the salt-type carboxyl group concentration (mmol / g) and the particle content (% by mass) is preferably 40 to 80.
[0009]
The knitted fabric of the present invention is a highly elastic knitted fabric composed of the elastic yarn and the inelastic fiber, but the inelastic fiber in the present invention is wool, cotton, natural fibers such as cotton, silk, and nylon, It is a fiber having a breaking elongation of less than 100% which is a synthetic filament such as polyester. It is preferable that the inelastic yarn does not substantially contain moisture-absorbing and heat-generating organic fine particles, and the front and back surfaces of the knitted fabric are covered with inelastic fibers. Substantially not containing the hygroscopic organic fine particles means that the knitted fabric does not contain a particle amount that influences the moisture absorption rate of the knitted fabric.
[0010]
The mixing ratio of the elastic yarn in the knitted fabric of the present invention is preferably 20% by mass or more of the constituent knitted fabric in order to obtain a moisture-absorbing and heating effect, and is less than 50% by mass in order to maintain comfort when worn. Is preferred. The elastic yarn according to the present invention has a characteristic that heat generation and heat radiation are mild and continuous for a long time as a result, since the moisture absorption and desorption rate is low and the moisture absorption attainment level is high as compared with cotton fiber and wool fiber, especially after stopping perspiration. Has a slow decreasing rate of the fiber temperature, and has an effect of suppressing a feeling of cooling after stopping the exercise. In addition, the salt-type carboxyl group has various effects such as deodorization, antibacterial antibacterial, pH buffering, and antistatic in addition to the effect of absorbing and generating heat, and is a product having ideal performance as a warm-up suit. In addition, since the bacteria do not propagate even when shaded, it is suitable as a swimsuit.
[0011]
In the knitted fabric of the present invention, the surface temperature rise of the knitted fabric during moisture absorption is 3 ° C. or more. The heat generated at the time of moisture absorption is determined by drying the knitted fabric at 70 ° C. for 2 hours, controlling the temperature in a desiccator containing silica gel for at least 8 hours, and then adjusting the knitted fabric surface by thermography in an atmosphere adjusted to 32 ° C. and 70% RH. Is measured continuously for 5 minutes, the maximum temperature is measured, and the difference from 32 ° C. is defined as the temperature increase. When the temperature is less than 3 ° C., there is no sensational effect, and it is preferable that the temperature rise is higher.
[0012]
The elongation characteristics of the knitted fabric are important requirements, and the knitted fabric must have a constant load elongation of 50% or more in order to increase the heat retention, adhere to the body as much as possible, and do not hinder mobility. It is desirable that the constant load elongation rate has an extensibility of 60 to 100%. In addition, in order to maintain the close contact with the body and to have excellent recoverability and not degrade the appearance, it is desirable that the constant load elongation recovery rate is 50% or more. More preferably, it is 60 to 95%.
[0013]
The method of mixing the elastic yarn and the non-elastic fiber may be a method of knitting the composite yarn and then knitting the elastic yarn and the non-elastic yarn. However, in the case of cross knitting, it is preferable that the elastic yarn does not directly appear on the front and back surfaces of the knitted fabric. This is because the surface of the moisture-absorbing fiber becomes sticky due to moisture absorption, so that the inelastic fiber which does not substantially absorb a large amount of moisture does not make the skin feel sticky.
[0014]
As a method of forming a composite yarn, there is a method of forming a composite spun yarn or a covering yarn. As a specific example of the method of forming a composite spun yarn, there is a method of supplying an elastic yarn to a roving draft region in an inelastic fiber spinning step at an appropriate draft ratio to form a sea core composite yarn. As a specific example of the method of forming the covering yarn, there is a method of supplying an elastic yarn at an appropriate draft ratio, and winding an inelastic yarn thereon. In the former case, wool, cotton, hemp, polyester short fibers, and nylon short fibers can be used as the inelastic fibers. In the latter case, spun silk, polyester filament yarn, nylon filament yarn, cotton and wool yarn can be used. In the case of a polyester filament yarn or a nylon filament yarn, it can be used as a composite false twisted yarn.
[0015]
These composite yarns can be used alone or cross-knitted with other fiber yarns to be used as a circular knitted fabric, and the circular knitted fabric has an advantage of relatively high elongation. The organization is not particularly limited as long as the elongation meets the necessary conditions.
[0016]
When using a warp knitted fabric, the elastic yarn is wrapped with the non-elastic filament yarn, regardless of the reed that is used after the reed to be supplied with a special inelastic filament yarn forming a stitch. Since it becomes ground, the elastic yarn can be used as a bear. In this case, a spun yarn can be used as the non-elastic yarn, but a filament yarn is preferable in order to suppress a decrease in operability with fluff or wool.
[0017]
【Example】
Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited thereto. In the examples, “parts” simply means “parts by mass”. [Measurement method of constant load elongation rate and constant load elongation recovery rate]
The measurement was carried out according to the method described in Chapter IV “Measurement of Mechanical Properties of Cloth” in “Standardization and Analysis of Hand Evaluation” (edited by the Japan Textile Machinery Society). The size of the measurement sample was 20 cm in width and 5 cm in length, and was collected in the longitudinal direction and the weft direction of the fabric, respectively. Place the measurement sample in the longitudinal direction at 4.00 × 10-3. At a constant speed of / sec, the film was pulled to a maximum load of 500 gf / cm, and then moved to the deformation recovery process, and the elongation at the maximum load (500 gf / cm) was determined. The average value in the warp and weft directions was taken as the elongation rate. The constant load elongation recovery rate was determined from the ratio of the elongation rate recovered by the removal of the load to the elongation rate at the maximum load (elongation rate recovered by the removal of the load ÷ elongation rate at the maximum load × 100).
[0018]
[Example 1]
200 parts of polyoxytetramethylene glycol having a molecular weight of 1800 and 45 parts of methylene-bis (4-phenylisocyanate) were reacted at 80 ° C. for 3 hours to obtain an intermediate polymer having isocyanate groups at both terminals. After cooling the intermediate polymer to 40 ° C, 375 parts of N, N-dimethylacetamide was added and the mixture was cooled to 10 ° C. A diethylamine solution in which 4.0 parts of ethylenediamine and 0.4 part of diethylamine were dissolved in 147.6 parts of N, N-dimethylacetamide was prepared, and the diethylamine solution was added to the rapidly stirring intermediate polymer solution at once, and the solution concentration was changed. A polyurethane polymer solution having 32.2% by mass and a viscosity of 2500 poise (30 ° C.) was obtained.
To the obtained polyurethane polymer solution, 4% of n-butylamine / N, N-dimethylhydrazine terminal-blocking polymer, a benzotriazole-based compound, and a hindered phenol-based compound were added and mixed.
Subsequently, a highly water-absorbing and desorbing organic fine particle (acrylonitrile, methyl acrylate, sodium p-styrenesulfonate) having an average particle size of 0.5 μm (measured by a light scattering photometer) and a swelling degree of 80% was copolymerized with the polyurethane polymer solution. The aqueous dispersion of the raw material fine particles thus obtained was subjected to hydrazine crosslinking and hydrolyzed with NaOH. 13% by mass of a sodium carboxylate and a sodium sulfonate as hydrophilic groups were added and mixed to obtain a spinning stock solution.
[0019]
After the spinning solution was removed from the spinning solution, the solution was discharged from a spinneret having a hole diameter of 0.5 mm, extruded into a spinning tube in which heated air at 235 ° C. was flown, applied with 5% omf of an oil agent, and wound at a speed of 550 m / min. The obtained yarn was subjected to a heat treatment at 40 ° C. for 72 hours to obtain a 44 dtex, 4-filament polyurethane elastic fiber.
[0020]
Using the obtained polyurethane elastic yarn as a back reed and a cationic normal-pressure dyeable polyester filament yarn 56 dtex 36 filament as a front reed, a half-structure warp knitted fabric (elastic fiber content is 25 mass%) with a 28 gauge tricot knitting machine. %). The obtained warp knitted fabric is subjected to scouring, presetting, room temperature dyeing, and final setting by a conventional method to give a course density of 102 C / 2.54 cm, a wale density of 62 W / 2.54 cm, and a basis weight of 200 g / m ² . A finished knit was obtained. Table 1 shows the elongation characteristics and moisture absorption and heat generation characteristics of this knitted fabric.
The knitted fabric was sewn to create leotards and spats, and when worn as tennis player's underwear in a gymnasium in winter, the initial chill was not felt. He was evaluated to be in good physical condition and no stuffiness.
[0021]
[Example 2]
While drafting the elastic yarn 78 decitex obtained by the same method as in Example 1 by 3.3 times, aligning it with nylon 6 filament 77 decitex 24 filament and performing one-stage false twist processing at 2,500 T / m, and before winding Then, approximately 60 pieces / m of interlace were inserted and wound.
Using the false-twisted composite yarn, a knitted fabric having a sheet-laying structure was obtained using a 28G circular knitting machine. The obtained knitted fabric was scoured, dyed, and set by a conventional method to obtain a finished knitted fabric having a basis weight of 150 g / m ² and an elastic yarn content of 25% by mass. Table 1 shows the elongation characteristics and moisture absorption and heat generation characteristics of this knitted fabric. Tights were sewn from the finished knitted fabric. The results of having the athlete wear this tights and evaluating the feeling of wearing at the time of warming were evaluations that the body temperature rose quickly and there was no stuffiness.
[0022]
[Comparative Example 1]
Tights were prepared in the same manner as in Example 2 except that the organic particles did not contain the highly hygroscopic organic fine particles. Table 1 shows the elongation characteristics and moisture absorption and heat generation characteristics of this knitted fabric. In addition, as a result of the evaluation by the same method as in Example 2, it was evaluated that rapid exercise was required for warming up, a feeling of stuffiness was felt with sweating, the exercise was stopped, and after a while, a feeling of cold was felt.
[0023]
[Table 1]

[0024]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, it is not only excellent in hygroscopicity, but also has a heating effect at the beginning of moisture absorption, enhances a warming effect, and is ideal for a warm-up suit rich in comfort without stickiness due to rapid cooling after stopping perspiration. It is a knitted fabric, and in addition, it is possible to provide a highly stretchable knitted fabric having a sanitary function such as an antibacterial property, a deodorant property, and a pH buffering property and an antistatic property.

Claims

高吸湿性有機微粒子を含有する弾性糸と非弾性繊維とより構成された高伸縮性編地であって、定荷重伸長率が５０％以上で定荷重伸長回復率が５０％以上であり、かつ吸湿時の編地の表面温度上昇が３℃以上であることを特徴とする吸湿発熱する高伸縮性編地。A highly elastic knitted fabric composed of an elastic yarn containing highly hygroscopic organic fine particles and an inelastic fiber, having a constant load elongation of 50% or more, a constant load elongation recovery of 50% or more, and A highly elastic knitted fabric that absorbs and generates heat, characterized in that the surface temperature rise of the knitted fabric during moisture absorption is 3 ° C or more.

高吸湿性有機微粒子が、アクリロニトリルを５０質量％以上有するアクリロニトリル系重合体にヒドラジン、ジビニルベンゼンまたはトリアリルイソシアネート処理により架橋構造を導入し、残存しているニトリル基を加水分解により塩型カルボキシル基に化学変換せしめたものであり、該有機微粒子を０．２〜５０質量％含有した弾性糸が構成編地の１０質量％以上複合されていることを特徴とする請求項１に記載の吸湿発熱する高伸縮性編地。Highly hygroscopic organic fine particles introduce a crosslinked structure into acrylonitrile-based polymer having acrylonitrile of 50% by mass or more by hydrazine, divinylbenzene or triallyl isocyanate treatment, and hydrolyze the remaining nitrile groups into salt-type carboxyl groups. 2. The moisture-absorbing and heat-generating device according to claim 1, wherein an elastic yarn containing 0.2 to 50% by mass of the organic fine particles is compounded by 10% by mass or more of the constituent knitted fabric. High stretch knitted fabric.

編地の表裏表面は非弾性繊維で覆われ、該非弾性繊維表面には高吸湿性有機微粒子が実質的に存在しないことを特徴とする請求項１又は２に記載の吸湿発熱する高伸縮性編地。3. The highly elastic knitted fabric according to claim 1, wherein the front and back surfaces of the knitted fabric are covered with inelastic fibers, and the surface of the inelastic fibers is substantially free of organic particles having high hygroscopicity. Earth.

弾性糸がポリウレタン繊維であることを特徴とする請求項１〜３に記載の吸湿発熱する高伸縮性編地。The highly stretchable knitted fabric that absorbs and generates moisture as claimed in any one of claims 1 to 3, wherein the elastic yarn is a polyurethane fiber.

高吸湿性有機微粒子を含有する弾性糸をドラフトしながら合成フィラメント糸と複合した後、該複合糸単独もしくは他フィラメント糸と丸編み機で交編することを特徴とする吸湿発熱する高伸縮性編地の製造方法。A highly stretchable knitted fabric that generates heat and absorbs moisture, wherein after the elastic yarn containing the highly hygroscopic organic fine particles is drafted and combined with the synthetic filament yarn, the composite yarn alone or another filament yarn is knitted with a circular knitting machine. Manufacturing method.

吸湿発熱性弾性糸のベアー糸を後筬に、合成フィラメント糸を最前筬に用いて、経編み機で編成することを特徴とする吸湿発熱する高伸縮性編地の製造方法。A method for producing a highly stretchable knitted fabric which generates heat and absorbs moisture, comprising knitting with a warp knitting machine, using a bare yarn of a moisture-absorbing heat-generating elastic yarn as a rear reed and a synthetic filament yarn as a front reed.