JP3580626B2 - Nonwoven fabric for hook-and-loop fastener and method for producing the same - Google Patents

Nonwoven fabric for hook-and-loop fastener and method for producing the same Download PDF

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JP3580626B2
JP3580626B2 JP443096A JP443096A JP3580626B2 JP 3580626 B2 JP3580626 B2 JP 3580626B2 JP 443096 A JP443096 A JP 443096A JP 443096 A JP443096 A JP 443096A JP 3580626 B2 JP3580626 B2 JP 3580626B2
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Japan
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web layer
nonwoven web
hook
long
fiber nonwoven
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JP443096A
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JPH09195155A (en
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克昇 鈴木
哲男 浅野
信夫 野口
美智代 飯見
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Unitika Ltd
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Unitika Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、フック部を有する雄材に対して着脱自在に接合できる面ファスナ用不織布に関するものである。
【0002】
【従来の技術】
従来、面ファスナは、突起部分が屈曲してなるフック部を有する雄材とループが形成された雌材とを、それぞれ、接合させようとする二つの面にあらかじめ接着あるいは縫製により固定させておき、この雄材のフック部を雌材のループに引っ掛けることにより脱着自在に接合させるものであった。
【0003】
【発明が解決しようとする課題】
このような従来の面ファスナでは、例えばカーテンの接続やジャケットへのフードカバーの取り付けのように対で用いる場合、または、例えば布団カバーの出し入れ口やカバンのふたの止め具のように雄材および雌材を固定する箇所が限定される場合には便利であったが、例えば電車や飛行機の座席にヘッドレストカバーを取り付ける場合のように接合する一方の箇所が不特定である場合や、ベルトの止め具のように接合する箇所を任意に変化させ得る自由度が要求される場合の用途には対応できないという問題があった。
【0004】
本発明はこのような問題を解決するもので、面ファスナの雌材を不織布で構成するとともにこの不織布表面の任意の箇所に面ファスナ雄材を接合させることができ、したがって、この雄材を取り付けるべき接合対象の特定箇所にこの雄材を固定するだけで面ファスナとしての機能をなし、使用目的に適宜対応できる面ファスナ用不織布を提供することを目的とするものである。
【0005】
【課題を解決するための手段】
この課題を解決するために本発明の面ファスナ用不織布は、長繊維不織ウエブ層と短繊維不織ウエブ層とが積層されてなる面ファスナ用不織布であって、長繊維不織ウエブ層が分割型複合長繊維により形成されており、かつ長繊維不織ウエブ層の構成繊維と短繊維不織ウエブ層の構成繊維とが相互に三次元的に交絡するとともに短繊維不織ウエブ層の構成繊維同士が三次元的に交絡しており、かつ面積0.5〜3.0mm の孔が配設密度15〜60個/cm で少なくとも長繊維不織ウエブ層の表面に配設されてなることを要旨とする。
【0006】
さらに、本発明の面ファスナ用不織布は、分割型複合長繊維が、互いに非相溶性を示す二成分の熱可塑性重合体からなることを要旨とする。
【0007】
また、本発明の面ファスナ用不織布の製造方法は、分割型複合長繊維により長繊維不織ウエブ層を形成し、この長繊維不織ウエブ層と短繊維不織ウエブ層とを積層して積層不織ウエブを形成し、次いでこの積層不織ウエブを移動する10〜20メッシュの多孔性支持板上に載置して加圧液体流処理を施し、長繊維不織ウエブ層の構成繊維と短繊維不織ウエブ層の構成繊維とを相互に三次元的に交絡させるとともに短繊維不織ウエブ層の構成繊維同士を三次元的に交絡させ、同時に、積層不織ウエブに面積0.5〜3.0mm の孔を配設密度15〜60個/cm で設けることを要旨とする。
【0008】
以上のように、本発明の面ファスナ用不織布は、10〜20メッシュ(10〜20本/1インチ)のネットからなる多孔性支持板を用いて加圧液体流処理を施すことによって、面積0.5〜3.0mm の孔が配設密度15〜60個/cm で配設されてなることから、面ファスナとして用いた際にこの孔が雌材のループの働きをなし、雄材のフック部がこの孔に引っ掛かることによって、着脱自在に接合させることができるものである。
【0009】
また、本発明の面ファスナ用不織布は、長繊維不織ウエブ層の構成繊維と短繊維不織ウエブ層の構成繊維とが相互に三次元的に交絡するとともに短繊維不織ウエブ層の構成繊維同士が三次元的に交絡することにより全体として一体化された不織布であるので、面ファスナ用の布帛として好適な柔軟性を具備し得るものである。
【0010】
さらに、本発明の面ファスナ用不織布は分割型複合長繊維から形成されてなることから、加圧液体流処理の際に構成繊維が細い割繊糸に分割され、多数本の極細繊維となるため、特に柔軟性、機械的特性に優れ、面ファスナ用不織布として好適なものとなる。
【0011】
本発明によれば、不織布の表面全体にわたりループに代わる孔を備えて面ファスナの雌材として機能し得ることから、不織布の任意の箇所に面ファスナ雄材を接合させることができ、したがって、この雄材を取り付けるべき接合対象の特定箇所にこの雄材を固定するだけで面ファスナとしての機能をなし、使用目的に適宜対応できる面ファスナ用不織布を提供することができる。
【0012】
【発明の実施の形態】
次に、本発明の面ファスナ用不織布について詳細に説明する。
本発明に適用される長繊維不織ウエブ層を構成する長繊維は、繊維形成性を有するポリオレフィン系重合体、ポリエステル系重合体、またはポリアミド系重合体から選択される2種以上の重合体からなるものである。
【0013】
ポリオレフィン系重合体としては、炭素原子数2〜18の脂肪族α−モノオレフィン、例えば、エチレン、プロピレン、1−ブテン、1−ドデセン、1−オクタデセンからなるホモポリオレフィン重合体が挙げられる。この脂肪族α−モノオレフィンは、他のエチレン系不飽和モノマー、例えばブタジエン、イソプレン、1,3−ペンタジエン、スチレン、α−メチルスチレンのような類似のエチレン系不飽和モノマーが共重合されたポリオレフィン系共重合体であっても良い。また、ポリエチレン系重合体の場合には、エチレンに対してプロピレン、1−ブテン、1−ヘキセン、1−オクテンまたは類似の高級α−オレフィンが10重量%以下の範囲で共重合されたものであっても良く、ポリプロピレン系重合体の場合には、プロピレンに対してエチレンまたは類似の高級α−オレフィンが10重量%以下の範囲で共重合されたものであっても良い。但し、このとき、これらの共重合物の共重合率が前記の範囲を超えると、共重合体の融点が低下し、これら共重合体からなる不織布を高温条件下で使用したときに、機械的特性や寸法安定性が低下するので好ましくない。
【0014】
ポリエステル系重合体としては、テレフタル酸、イソフタル酸、ナフタリン−2,6−ジカルボン酸などの芳香族ジカルボン酸、あるいはアジピン酸、セバチン酸などの脂肪族ジカルボン酸またはこれらのエステル類を酸成分とし、かつ、エチレングリコール、ジエチレングリコール、1,4−ブタジオール、ネオペンチルグリコール、シクロヘキサン−1,4−ジメタノールなどのジオール化合物をアルコール成分とするホモポリエステル重合体あるいはこれらの共重合体が挙げられる。なお、これらのポリエステル系重合体には、パラオキシ安息香酸、5−ソジウムスルホイソフタール酸、ポリアルキレングリコール、ペンタエリスリトール、ビスフェノールAなどが添加あるいは共重合されていても良い。
【0015】
ポリアミド系重合体としては、ポリイミノ−1−オキソテトラメチレン(ナイロン4)、ポリテトラメチレンアジパミド(ナイロン46)、ポリカプラミド(ナイロン6)、ポリヘキサメチレンアジパミド(ナイロン66)、ポリウンデカナミド(ナイロン11)、ポリラウロラクタミド(ナイロン12)、ポリメタキシレンアジパミド、ポリパラキシリレンデカナミド,ポリビスシクロヘキシルメタンデカナミドまたはこれらのモノマーを構成単位とするポリアミド系共重合体が挙げられる。特に、ポリテトラメチレンアジパミドを適用する場合、ポリカプラミドやポリヘキサメチレンアジパミド、ポリウンデカメチレンテレフタラミドなどの他のポリアミド成分が30モル%以下の範囲で共重合されたポリテトラメチレンアジパミド系共重合体であっても良い。但し、このとき、他のポリアミド成分の共重合率が30モル%を超えると、共重合体の融点が低下し、これら共重合体からなる不織布を高温条件下で使用したときに、機械的特性や寸法安定性が低下するので好ましくない。
【0016】
なお、本発明において、長繊維不織ウエブ層を構成する前記重合体には、必要に応じて、例えば艶消し剤、顔料、防炎剤、消臭剤、光安定剤、熱安定剤、酸化防止剤などの各種添加剤を本発明の効果を損なわない範囲内で添加することができる。
【0017】
本発明に適用される長繊維不織ウエブ層を構成する長繊維は分割型複合断面でなければならない。長繊維を分割型複合断面とすることにより、加圧液体流処理の際に構成繊維が細い割繊糸に分割されて多数本の極細繊維となるため、得られる不織布の柔軟性が特に向上し、また効率良く三次元的交絡が形成し得ることから機械的特性にも優れ、面ファスナ用不織布として好適なものとなる。ここで、分割型複合断面とは、相異なる二成分が隣接して存在するよう配置した断面をいい、例えば、一つの芯部の周囲にこれよりも小さい複数の葉部が配された多葉型複合断面や、二成分が互いに細かく分断されるように交互に配された交互配列型複合断面等が挙げられる。
【0018】
このような分割型複合断面の糸は、加圧液体流のような外力を受けると、二成分の隣接部分が割れることにより各成分毎に分割されて細繊度の割繊糸となる。これは、相異なる二成分は基本的に混じり合わず、それぞれに異なるフィラメントを形成していると考えられるためであり、従って、本発明のごとく分割型複合断面とする場合には、前記の熱可塑性重合体のうち、互いに非相溶性を示す二成分を選択することが好ましい。
【0019】
本発明において、長繊維不織ウエブ層を構成する長繊維は、単繊維繊度が1.5〜10.0デニールであることが好ましい。単繊維繊度が1.5デニール未満であると、得られた面ファスナ用不織布の機械的特性が低下したり、溶融紡糸工程において製糸性が低下したりし、しかも、面ファスナ雄材との剥離を繰り返すことによって毛羽が生じ易くなり、雄材との接合力が劣る傾向にあるので好ましくない。一方、単繊維繊度が10.0デニールを超えると、得られた面ファスナ用不織布の風合いが硬くなって、柔軟性が低下する傾向にあるので好ましくない。したがって、本発明では、この単繊維繊度が1.5〜10.0デニール、好ましくは2.0〜8.0デニールであるのが良い。
【0020】
本発明において、長繊維不織ウエブ層は、その目付けが10〜60g/m であるのが好ましい。目付けが10g/m 未満であると、長繊維同士の緻密な重なりの程度が低く、この長繊維不織ウエブ層に短繊維不織ウエブ層を積層して得られる不織布の地合いが低下するので好ましくない。一方、目付けが60g/m を超えると、この長繊維不織ウエブ層に短繊維不織ウエブ層を積層して加圧液体流処理を施すに際して、長繊維不織ウエブ層の構成繊維と短繊維不織ウエブ層の構成繊維とが三次元的に十分に交絡せず、このため全体としての一体化がなされないため、得られた面ファスナ用不織布から面ファスナ雄材を剥離する際に層間剥離を起こしやすくなるので好ましくない。したがって、長繊維不織ウエブ層の目付けは10〜40g/m であるのが特に好ましい。
【0021】
本発明に適用される短繊維不織ウエブ層を構成する短繊維としては、木綿に代表される天然繊維、パルプから得られる再生繊維のほか熱可塑性重合体から得られる短繊維等が挙げられる。
【0022】
本発明において、木綿繊維としては、晒しの施されていないコーマ糸、晒し加工の施された晒し綿等のほか、木綿の糸、織物または編物等から得られた反毛を用いることができる。ここで、反毛を効果的に得ることができる反毛機としては、ラッグ・マシン、ノット・ブレイカー、ガーネット・マシン、廻切機などがある。用いる反毛機の種類や組合せは、反毛される布帛の形状や、構成する糸の太さや撚りの強さなどにもよるが、同一の反毛機を複数台直列に連結させたり、2種以上の反毛機の組合を用いたりすると効果的である。この反毛機による解繊率は50〜95%の範囲が好ましい。解繊率が50%未満であると、カードウエブ中に未解繊繊維が存在し、不織布表面にザラツキが生じるばかりか、交絡処理の際の加圧液体流がウエブを十分に貫通せずに、短繊維不織ウエブ層の構成繊維相互の交絡が不十分となったり、長繊維不織ウエブ層の構成繊維と短繊維不織ウエブ層の構成繊維との相互の交絡が不十分となって、長繊維不織ウエブ層と短繊維不織ウエブ層とが簡単に剥離し易くなり好ましくない。一方、解繊率が95%を超えると、十分な不織布摩擦強度が得られないので、好ましくない。なお、反毛の解繊率は下記の式により求められる。
解繊率(%)=(反毛重量−未解繊物重量)×100/反毛重量
【0023】
木綿より得られる反毛の素材としては、晒し綿よりなる織・編物や布帛のほか、染色・プリントの施されたもの、また蛍光処理の施された織・編物等も用いることができる。
【0024】
本発明において、パルプより得られる再生繊維としては、ビスコースレーヨン、酢酸セルロースレーヨンのほか、溶剤紡出されたレーヨンであるリヨセル等が用いられる。
【0025】
本発明において、熱可塑性重合体からなる短繊維とは、長繊維不織ウエブ層を形成する長繊維を構成する熱可塑性合成重合体と同様の前記重合体からなるものである。
【0026】
本発明における短繊維不織ウエブ層としては、前記短繊維素材からなるパラレルカードウエブやランダムカードウエブやクロスレイドウエブ等を挙げることができる。ここで、短繊維素材としては、前記の中から選択された単一素材からなるもののほかに、複数種の素材が混合されてなるものであっても良い。また、この短繊維不織ウエブ層は長繊維不織ウエブ層と同一素材からなるものを採用することもできる。
【0027】
この短繊維不織ウエブ層は、その目付けが10〜60g/m であるのが好ましい。目付けが10g/m 未満であると、積層不織ウエブとしたときの形態保持性が低下するので好ましくない。一方、目付けが60g/m を超えると、長繊維不織ウエブ層の構成繊維とこの短繊維不織ウエブ層の構成繊維との三次元的交絡およびこの短繊維不織ウエブ層の構成繊維同士の三次元的交絡がいずれも十分に形成されず、面ファスナ雄材との剥離を繰り返すことにより、長繊維不織ウエブ層表面の構成繊維が剥離して毛羽立ったものとなり、雄材との接合力が劣ることとなり好ましくない。
【0028】
本発明の不織布は、前記長繊維不織ウエブ層に前記短繊維不織ウエブ層が積層され、長繊維不織ウエブ層の構成繊維と短繊維不織ウエブ層の構成繊維とが相互に三次元的に交絡し、かつ短繊維不織ウエブ層の構成繊維同士が三次元的に交絡してなるものである。このような構成において、短繊維不織ウエブ層は主として基布として機能し、長繊維不織ウエブ層は主として雄材のフック部を引っ掛けるための引っ掛かり部として機能する。例えば、短繊維不織ウエブ層を引っ掛かり部としてフック部と引っ掛けた場合、短繊維に毛羽立ちが生じ、得られる不織布は繰り返しの脱着に耐えないものとなる。
【0029】
本発明においては、このような面ファスナ用布帛として好適な不織布に、面積0.5〜3.0mm の孔を配設密度15〜60個/cm で少なくとも長繊維不織ウエブ層の表面に配設されていることが重要である。この孔は、後述する加圧液体流処理によって、構成繊維間を三次元的に交絡させるのと同時に、形成されるものである。このような孔が多数存在することにより、本発明の不織布を面ファスナとして用いた際にこの孔が雄材のフック部を引っ掛ける対象として機能し、雄材のフック部がこの孔に引っ掛かることによって、着脱自在に接合させることができるのである。また、この孔は少なくとも長繊維不織ウエブ層の表面に設けられ、長繊維不織ウエブ層側にフック部が引っ掛かることから、前述のように、引っ掛かり部としてフック部と引っ掛けた場合に毛羽立ちを生じることもない。
【0030】
ここで、一つの孔の面積は0.5〜3.0mm でなければならない。この面積が0.5mm 未満であると、孔が小さすぎるために雄材のフック部がこの孔に引っ掛かりにくく、一方、この面積が3.0mm を超えると、孔が大きくなりすぎるために雄材のフック部は引っ掛かるものの接合力が弱く、いずれも面ファスナとしての十分な接合力を具備し得ないこととなる。
【0031】
また、孔の配設密度は、15〜60個/cm でなければならない。孔の配設密度が15個/cm 未満であると、雄材のフック部がこの孔に引っ掛かる確率が低くなるため、面ファスナとして接合し難くなり、一方、孔の配設密度が60個/cm を超えると、不織布としての形態安定性を損なうこととなり、いずれも好ましくない。
【0032】
なお、孔が不織布を完全に貫通しているか否か、あるいは貫通していない場合の孔の深さについては、雄材のフック部の引っ掛かりが可能である限り特に制限はない。
【0033】
次に、本発明の面ファスナ用不織布の製造方法について説明する。
本発明の不織布は、例えばスパンボンド法により形成した分割型複合長繊維からなる長繊維不織ウエブ層に、常法により得られる短繊維不織ウエブ層を積層して積層不織ウエブを構成し、この積層不織ウエブを移動する10〜20メッシュのネットからなる多孔性支持板上に載置して加圧液体流処理を施し、長繊維不織ウエブ層の構成繊維と短繊維不織ウエブ層の構成繊維とを相互に三次元的に交絡させ、かつ短繊維不織ウエブ層の構成繊維同士を三次元的に交絡させて全体として一体化させると同時に、積層不織ウエブに面積0.5〜3.0mm の孔を配設密度15〜60個/cm で設けることにより、効率良く製造することができる。
【0034】
詳しくは、まず、長繊維不織ウエブ層をスパンボンド法で製造する。すなわち、前述の繊維形成性を有するポリオレフイン系重合体、ポリエステル系重合体またはポリアミド系重合体から選択される2種以上の重合体を溶融し、これを複合紡糸口金を通して紡出し、紡出されたポリマー流を冷却した後、エアサッカー等の引取り手段を用いて牽引し、開繊し、移動する捕集面上に捕集・堆積させて、単繊維繊度が1.5〜8.0デニールの分割型複合断面を有する単繊維からなる長繊維不織ウエブ層とする。
【0035】
引取り手段を用いて牽引するに際しては、引取り速度を3000〜6000m/分とするのが好ましい。引取り速度が3000m/分未満であると、長繊維の分子配向度が十分に増大しないため得られたウエブの機械的特性や寸法安定性が向上せず、一方、引取り速度が6000m/分を超えると、溶融紡糸時の製糸性が低下するため、いずれも好ましくない。
【0036】
本発明においては、長繊維不織ウエブ層に、積層前にあらかじめ部分的な熱圧接を施しておくことが好ましい。これにより、この長繊維不織ウエブ層を短繊維不織ウエブ層に積層して加圧液体流処理を施す際に、長繊維不織ウエブ層の形態を良好に保持させることができ、また得られる不織布の機械的強度にも優れることとなる。また、長繊維不織ウエブ層に形成された熱接着点のうち少なくとも一部は、後に施される加圧液体流処理によって剥離されることから、得られる不織布の柔軟性を損なうこともない。
【0037】
ここで、部分的な熱圧接とは、表面に彫刻模様が刻印された加熱状態のロールすなわちエンボスロールと、表面が平滑な加熱状態の金属ロールとの間にウエブを通すことにより、前記彫刻模様に該当する部分のウエブ構成繊維同士を熱的に接着させることをいう。
【0038】
さらに詳しくは、この部分的な熱圧接が行われた箇所は、長繊維不織ウエブ層の全表面積に対して特定の領域を有する。すなわち、個々の熱圧接領域は、必ずしも円形の形状である必要はないが、0.1〜1.0mm の面積を有し、その密度すなわち圧接点密度が2〜80点/cm 、好ましくは4〜60点/cmのものであるのが良い。この圧接点密度が2点/cm 未満であると、熱圧接後のウエブの機械的特性や形態保持性が向上せず、一方、圧接点密度が80点/cm を超えると、長繊維不織ウエブ層の大半が熱融着されるため柔軟性を損ない、また三次元交絡を形成する際に加圧液体流がウエブを貫通しないため短繊維不織ウエブ層との交絡性に劣り、面ファスナ雄材から剥離する際に層間剥離を起こしやすくなるので好ましくない。また、長繊維不織ウエブ層の全表面積に対する全熱圧接領域の面積の比すなわち圧接面積率は2〜30%、好ましくは4〜20%とするのが良い。この圧接面積率が2%未満であると、熱圧接後のウエブの寸法安定性が向上せず、ひいては、得られた面ファスナ用不織布の寸法安定性が劣り好ましくない。一方、圧接面積率が30%を超えると、構成繊維の大半が熱融着され、長繊維不織ウエブ層の柔軟性を損ない、また三次元交絡を形成する際に加圧液体流がウエブを貫通しないため短繊維不織ウエブ層との交絡性に劣るので好ましくない。
【0039】
長繊維不織ウエブに部分的な熱圧接処理を施すに際し、エンボスロールの条件は、この長繊維を構成する重合体の種類により適宜選択すれば良いのであるが、特に、エンボスロールの表面温度を長繊維不織ウエブ層を形成する複合長繊維を構成する成分のうち最も融点の低い成分の融点をTm℃としたときに、(Tm−30)℃〜(Tm+10)℃の範囲とし、かつエンボスロールの線圧を5〜50kg/cmするのが好ましい。エンボスロールの表面温度と線圧の条件は特に重要である。エンボスロールの表面温度が(Tm+10)℃を超えるか、または線圧が50kg/cmを超えると、熱圧接処理を施す際に長繊維不織ウエブ層の大半が熱融着してしまうため柔軟性を損ない、また三次元交絡を形成する際に加圧液体流がウエブを貫通しないため短繊維不織ウエブ層との交絡性に劣るので好ましくない。一方、エンボスロールの表面温度が(Tm−30)℃未満か、または線圧が5kg/cm未満であると、長繊維不織ウエブの構成繊維間が殆ど接着されず、加圧液体流処理の際の形態保持性が十分でないため好ましくない。
【0040】
次に、得られた長繊維不織ウエブ層の片面に前記短繊維から常法により得られる短繊維不織ウエブ層を積層した後、この積層不織ウエブの短繊維不織ウエブ層側より加圧液体流処理を施して、長繊維不織ウエブ層の構成繊維と短繊維不織ウエブ層の構成繊維とを相互に三次元的に交絡させ、かつ短繊維不織ウエブ層の構成繊維同士を三次元的に交絡させて全体として一体化させると同時に、積層不織ウエブに面積0.5〜3.0mm の孔を配設密度15〜60個/cm で設ける。
【0041】
加圧液体流処理を施すに際しては、例えば孔径が0.05〜2.0mm特に0.1〜0.4mmの噴射孔を孔間隔を0.3〜10mmとして1列あるいは複数列に多数配列したオリフィス・ヘッドを用い、噴射圧力が5〜150kg/cm Gの加圧液体流を前記噴射孔から噴射する方法を採用する。噴射孔は、積層不織ウエブの進行方向と直交する方向に列状に配列する。加圧液体としては、水あるいは温水を用いるのが一般的である。噴射孔と積層不織ウエブとの間の距離は、1〜15cmとするのが良い。この距離が1cm未満であるとこの処理により得られる不織布の地合いが乱れ、一方、この距離が15cmを超えると液体流が積層不織ウエブに衝突したときの衝撃力が低下して三次元的な交絡が十分に施されないため、いずれも好ましくない。
【0042】
加圧液体流処理は、加圧液体流を噴出して衝突させたときに生じる短繊維不織ウエブ層の地合いの乱れや目付け斑を防止する点から、少なくとも2段階に分けて施すことが好ましい。まず、第1段階の処理として、圧力が5〜40kg/cm Gの加圧液体流を噴出して積層不織ウエブの短繊維不織ウエブ層側に衝突させ、短繊維不織ウエブ層の構成繊維同士を予備的に交絡させる。この第1段階の処理において、液体流の圧力が5kg/cm G未満であると、短繊維不織ウエブ層の構成繊維同士を予備的に交絡させることができず、一方、液体流の圧力が40kg/cm Gを超えると、積層不織ウエブに加圧液体流を噴出して衝突させたときに短繊維不織ウエブ層の構成繊維が液体流の作用によって乱れ、この短繊維不織ウエブ層に地合いの乱れや目付け斑が生じるため、いずれも好ましくない。
【0043】
次いで、第2段階の処理として圧力が40〜150kg/cm Gの加圧液体流を噴出して積層不織ウエブに衝突させ、長繊維不織ウエブ層の構成繊維と短繊維不織ウエブ層の構成繊維とを相互に三次元的に交絡させるとともに、短繊維不織ウエブ層の構成繊維同士を三次元的に交絡させ、この積層物を全体として一体化させる。この第2段階の処理において、液体流の圧力が40kg/cm G未満であると、上述したような繊維間の三次元的交絡を十分に形成することができず、一方、液体流の圧力が150kg/cm Gを超えると、得られた不織布に形成される孔が大きくなり過ぎるため、雌材として雄材のフック部との引っ掛かりが不十分となり、面ファスナとしての接合力に劣ることとなるので、いずれも好ましくない。このように第2段階の処理として圧力が40〜150kg/cm Gの加圧液体流を用いるが、その際には上述の第1段階の処理によりあらかじめ短繊維不織ウエブ層の構成繊維同士を予備的に交絡させてあるため、この短繊維不織ウエブ層の構成繊維が第2段階の高圧の液体流の作用によって乱れることでそのウエブ層に地合いの乱れや目付け斑が生じたりすることはない。
【0044】
加圧液体流処理を施すに際し、積層物を担持する支持材は、10〜20メッシュのネットからなる多孔性のものであることが重要である。このような支持体を用いることにより初めて、前記のような面積および配設密度を満足する孔を形成することができるのである。支持材のメッシュが10メッシュ未満であると、加圧液体流処理で形成される孔が大きくなり過ぎ、雄材のフック部と引っ掛かるものの接合力が弱くなり、形態保持性にも劣ることとなるため、面ファスナとして適さない。一方、支持材のメッシュが20メッシュを超えると、加圧液体流処理で形成される孔の配設密度が大きくなり過ぎ、孔の面積が小さくなるので、雄材のフック部と引っ掛かり難くなり、面ファスナとして適さない。なお、支持材の材質は、特に限定されない。
【0045】
加圧液体流処理を施した後、処理後の積層物から過剰水分を除去する必要があるが、この過剰水分の除去には、公知の方法を採用することができる。例えばマングルロール等の絞り装置を用いて過剰水分をある程度機械的に除去し、引き続き連続熱風乾燥機等の乾燥装置を用いて残余の水分を除去すれば良い。
【0046】
なお、本発明の不織布には、必要に応じて、染色、プリント等の加工を行うことができる。
【0047】
【実施例】
次に、実施例に基づき本発明を具体的に説明するが、本発明は、これらの実施例のみに限定されるものではない。
以下の実施例における各種特性値の測定は、次の方法により実施した。
【0048】
(1)融点(℃):パーキンエルマ社製示差走査型熱量計DSC−2型を用い、昇温速度20℃/分の条件で測定し、得られた融解吸熱曲線において極値を与える温度を融点(℃)とした。
【0049】
(2)メルトインデックス(g/10分):ASTM−D−1238(L)に記載の方法で測定した。
【0050】
(3)相対粘度(イ):フェノールと四塩化エタンの等重量混合液を溶媒とし、この溶媒100ccに試料0.5gを溶解し、温度20℃の条件で常法により測定した。
【0051】
(4)相対粘度(ロ):96%硫酸、温度25℃の条件で測定した。
【0052】
(5)不織布の目付け(g/m ):標準状態の試料から縦10cm×横10cmの試料片計10点を作成し、平衡水分に至らしめた後、各試料片の重量(g)を秤量し、得られた値の平均値を単位面積(m )当たりに換算して目付け(g/m )とした。
【0053】
(6)孔の面積(mm ):日本光学(株)製万能投影機(PROFILE PROJECTOR V−12)を用い、不織布に形成された任意の孔50個の縦・横の長さを小数点以下3桁までmm単位で測定して孔面積を算出し、その平均値を孔面積(mm )とした。
【0054】
(7)孔の配設密度(個/cm ):日本光学(株)製万能投影機(PROFILE PROJECTOR V−12)を用い、各々1cm 中の孔数を10箇所に亘り数え、その平均値を各々の孔の配設密度(個/cm )とした。
【0055】
(8)不織布の引張強力(kg/5cm幅)及び引張伸度(%):JIS−L−1096Aに記載の方法に準じて測定した。すなわち、試料長が15cm、試料幅が5cmの試料片を不織布の機械方向(MD)およびそれに直交する方向(CD)にそれぞれ10点ずつ作成し、各試料片毎に、不織布のMD方向およびCD方向について、定速伸長型引張試験機(東洋ボールドウイン社製テンシロンUTM−4−1−100)を用い、試料の掴み間隔10cmとし、引張速度10cm/分で伸長した。そして、得られた切断時荷重値(kg/5cm)の平均値を引張強力(kg/5cm幅)とするとともに、切断時伸長率(%)の平均値を引張伸度(%)とした。
【0056】
(9)圧縮剛軟度(g):試料長が10cm、試料幅が5cmの試料片計5点を作成し、各試料片毎に横方向に曲げて円筒状物とし、各々その端部を接合したものを圧縮剛軟度測定試料とした。次いで、各測定試料毎にその軸方向について、定速伸長型引張試験機(東洋ボールドウイン社製テンシロンUTM−4−1−100)を用い、圧縮速度5cm/分で圧縮し、得られた最大荷重値(g)の平均値を圧縮剛軟度(g)とした。
【0057】
(10)面ファスナ雄材との接合力:面ファスナ雄材として、YKK(株)製面ファスナ(1QEFN−N25)を用い、不織布との接合力および20回着脱を繰り返し行い、下記の5段階評価を行った。
【0058】
5:接合力が極めて良好である。
4:接合力が良好である。
3:接合力がやや良好である。
2:接合力が弱い。
1:全く接合しない。
【0059】
(実施例1)
融点が259℃、相対粘度が1.38のポリエチレンテレフタレート重合体チップと融点が128℃、メルトインデックス値が25g/10分のポリエチレン重合体チップとを用い、スパンボンド法により分割型複合長繊維不織ウエブ層を製造した。すなわち、前記2種の重合体チップを紡糸温度285℃で溶融し、これを分割複合型紡糸口金を通して紡出し、溶融紡出されたポリマー流を冷却した後、エアーサッカを用いて引き取り速度3500m/分で引き取った後、コロナ放電手段を用いて開繊し、移動する捕集面上に捕集・堆積させて単繊維繊度が2.5デニールの長繊維からなるウエブとし、次いで得られたウエブに熱圧接処理を施して目付けが30g/m の長繊維不織ウエブ層を得た。熱圧接処理に際しては、面積が、0.6mm の彫刻模様が圧接点密度20点/cm かつ圧接面積率15%で配設されたエンボスロールと表面が平滑な金属ロールとを用い、このエンボスロールと表面が平滑な金属ロールの表面温度を115℃、かつ両ロール間の線圧を30kg/cmとして行った。
【0060】
短繊維不織ウエブ層として、平均繊度1.6デニール、平均繊維長22mmのコットンの晒綿を用いて、目付けが25g/m のパラレルカードウエブを作成した。そして、これを前述の長繊維不織ウエブ層の片面に積層し、短繊維不織ウエブ層を上側にして移動する20メッシュの金属製ネット上に載置して、三次元的交絡処理を2段階で施した。すなわち、まず予備交絡処理として、孔径0.1mmの噴射孔が孔間隔0.6mmで一列に配されたオリフィス・ヘッドを用い、この短繊維不織ウエブ層の上方50mmの位置より、噴射圧40kg/cm Gの加圧液体流により第1段階の予備交絡を施した。そして、引続き前記オリフィス・ヘッドを用い、噴射圧70kg/cm Gで4回の処理を施して、第2段階の交絡処理とした。次いで、この交絡処理の施された積層不織ウエブから、既知の水分除去装置であるマングルを用いて余剰の水分を除去し、引続きサクションバンド方式の乾燥機を用いて90℃で乾燥処理を行った。得られた不織布は、短繊維不織ウエブ層を構成する繊維同士に交絡が施されるとともに、短繊維不織ウエブ層および長繊維不織ウエブ層の構成繊維相互に三次元的交絡が施されて緻密に一体化したものであった。得られた不織布の性能を以下に示す。
【0061】
目付け :55.4g/m
孔の面積 :0.72mm
孔の配設密度 :59.4個/cm
強力(MD) :8.5kg/5cm幅
伸度(MD) :45.4%
強力(CD) :4.6kg/5cm幅
伸度(CD) :59.6%
剛軟度 :20g
面ファスナ雄材との接合力 : 5
得られた不織布は、面ファスナ雄材と接合させた場合にも十分な接合力を保持し、また機械的特性、柔軟性に優れ、面ファスナ用不織布として実用に耐え得るものであった。
【0062】
(実施例2)
融点が259℃、相対粘度(イ)が1.38のポリエチレンテレフタレート重合体チップと融点が225℃、相対粘度(ロ)が2.56のナイロン6とを用い、紡糸温度290℃で溶融し、これを分割型複合紡糸口金を通して紡出し、溶融紡出されたポリマー流を冷却した後、エアーサッカを用いて引き取り速度3200m/分で引き取った後、コロナ放電手段を用いて開繊し、移動する捕集面上に捕集・堆積させて単繊維繊度が3.0デニールの長繊維からなるウエブとし、次いで得られたウエブに熱圧接処理を施して目付けが25g/m の長繊維不織ウエブ層を得た。熱圧接処理に際しては、面積が、0.25mm の彫刻模様が圧接点密度16点/cm かつ圧接面積率15%で配設されたエンボスロールと表面が平滑な金属ロールとを用い、このエンボスロールと表面が平滑な金属ロールの表面温度を200℃、かつ両ロール間の線圧を50kg/cmとして行った。得られた長繊維不織ウエブは、ポリマー成分が長繊維の糸条方向にわたって並列に配されたものであった。
【0063】
短繊維不織ウエブ層として、平均繊度2.0デニール、平均繊維長51mmであるポリエステル短繊維(日本エステル社製 タイプ101)からなる目付けが25g/m のパラレルカードウエブを作成した。そして、これを前述の長繊維不織ウエブ層の片面に積層し、10メッシュのポリエステル製ネットを使用する以外は、実施例1と同一条件で交絡処理を施した後、乾燥処理を行って不織布を得た。得られた不織布の性能を以下に示す。
【0064】
目付け :50.6g/m
孔の面積 :2.86mm
孔の配設密度 :15.6個/cm
強力(MD) :8.4kg/5cm幅
伸度(MD) :53.5%
強力(CD) :5.5kg/5cm幅
伸度(CD) :69.5%
剛軟度 :20g
面ファスナ雄材との接合力 : 5
得られた不織布は、面ファスナ雄材と接合させた場合にも十分な接合力を保持し、また機械的特性、柔軟性に優れ、面ファスナ用不織布として実用に耐え得るものであった。
【0065】
(比較例1)
長繊維不織ウエブ層としては、実施例1と同一条件にて得られた目付け25g/m の長繊維不織ウエブ層を用い、短繊維不織ウエブ層としては、コットン晒し綿(平均繊度1.8デニール、平均繊維長26mm)からなる目付け30g/m パラレルカードウエブを用いた。
【0066】
長繊維不織ウエブ層に短繊維不織ウエブ層を積層し、30メッシュのポリエステル製ネットを支持体として用い、短繊維不織ウエブ層を上側にしてにネット上に載置して、短繊維不織ウエブ層の上方20mmの位置にある孔径0.12mmの噴射孔より第1回目の予備交絡処理としては35kg/cm Gの加圧液体流を作用させて交絡を施し、引続き、第2回目の交絡処理を70kg/cm Gの加圧液体流を作用させて交絡を施した。得られた不織布の性能を以下に示す。
【0067】
目付け :54.8g/m
孔の面積 :0.29mm
孔の配設密度 :138.3個/cm
強力(MD) :7.3kg/5cm幅
伸度(MD) :60.5%
強力(CD) :5.2kg/5cm幅
伸度(CD) :74.6%
剛軟度 :31g
面ファスナ雄材との接合力 : 2
得られた不織布は、機械的特性、柔軟性には優れているが、30メッシュの支持体を用いたので形成された孔が小さくなりすぎて雄材のフック部との引っ掛かりが不十分となり、このため面ファスナ雄材との接合力に劣り、面ファスナ雌材に適さないものであった。
【0068】
(比較例2)
8メッシュのポリエステル製ネットを支持体として用いること以外は、比較例1と同一条件にて不織布を得た。得られた不織布の性能を以下に示す。
【0069】
目付け :52.8g/m
孔の面積 :3.84mm
孔の配設密度 :9.7個/cm
強力(MD) :3.3kg/5cm幅
伸度(MD) :50.5%
強力(CD) :1.2kg/5cm幅
伸度(CD) :58.6%
剛軟度 :35g
面ファスナ雄材との接合力 : 2
得られた不織布は、8メッシュの支持体を用いたので形成された孔が大きくなりすぎ、雄材のフック部と引っ掛かるものの接合力が弱く、面ファスナ雌材に適さないものであった。
【0070】
【発明の効果】
本発明の面ファスナ用不織布は、10〜20メッシュのネットからなる多孔性支持板を用いて加圧液体流処理を施すことによって、面積0.5〜3.0mmの孔が配設密度15〜60個/cm で配設されてなることから、面ファスナとして用いた際にこの孔が雌材のループの働きをなし、雄材のフック部がこの孔に引っ掛かることによって、着脱自在に接合させることができるものである。
【0071】
また、本発明の面ファスナ用不織布は、長繊維不織ウエブ層の構成繊維と短繊維不織ウエブ層の構成繊維とが相互に三次元的に交絡するとともに短繊維不織ウエブ層の構成繊維同士が三次元的に交絡することにより全体として一体化された不織布であるので、面ファスナ用の布帛として好適な柔軟性を具備し得るものである。
【0072】
さらに、本発明の面ファスナ用不織布は分割型複合長繊維から形成されてなることから、加圧液体流処理の際に構成繊維が細い割繊糸に分割され、多数本の極細繊維となるため、特に柔軟性、機械的特性に優れ、面ファスナ用不織布として好適なものとなる。
【0073】
したがって、本発明によれば、不織布の表面全体にわたりループに代わる孔を備えて面ファスナの雌材として機能し得ることから、任意の箇所に面ファスナ雄材を接合させることができ、したがって、この雄材を取り付けるべき接合対象の特定箇所にこの雄材を固定するだけで面ファスナとしての機能をなし、使用目的に適宜対応できる面ファスナ用不織布を提供することができる。
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a nonwoven fabric for a hook-and-loop fastener that can be detachably joined to a male material having a hook portion.
[0002]
[Prior art]
Conventionally, the hook-and-loop fastener has a male member having a hook portion formed by bending a protruding portion and a female member having a loop formed thereon, which are fixed to two surfaces to be joined in advance by bonding or sewing, respectively. The hook portion of the male material is hooked on the loop of the female material so as to be detachably joined.
[0003]
[Problems to be solved by the invention]
Such conventional hook-and-loop fasteners are used in pairs, for example, for connecting a curtain or attaching a hood cover to a jacket, or as male and female, for example, as a door for a duvet cover or a stopper for a bag lid. It is convenient when the place where the material is fixed is limited, but when one of the joining points is unspecified, such as when attaching a headrest cover to a train or airplane seat, or a belt stopper However, there is a problem that it cannot cope with an application in which a degree of freedom is required to be able to arbitrarily change the joining portion as described above.
[0004]
The present invention solves such a problem, and the female member of the hook-and-loop fastener can be formed of a non-woven fabric, and the male member of the hook-and-loop fastener can be bonded to an arbitrary portion of the surface of the non-woven fabric. An object of the present invention is to provide a non-woven fabric for a hook-and-loop fastener that can function as a hook-and-loop fastener only by fixing the male material to a specific portion of an object and can appropriately correspond to a purpose of use.
[0005]
[Means for Solving the Problems]
In order to solve this problem, the non-woven fabric for hook-and-loop fastener of the present invention is a non-woven fabric for hook-and-loop fastener obtained by laminating a long fiber non-woven web layer and a short fiber non-woven web layer. The fibers constituting the long fiber non-woven web layer and the fibers constituting the short fiber non-woven web layer are formed of splittable composite long fibers, and the fibers constituting the short fiber non-woven web layer are three-dimensionally entangled with each other and the short fiber non-woven web layer is formed The fibers are entangled three-dimensionally, and the area is 0.5 to 3.0 mm2  Holes are arranged at a density of 15 to 60 holes / cm2  The gist of the present invention is that it is disposed at least on the surface of the long fiber nonwoven web layer.
[0006]
Further, the nonwoven fabric for hook-and-loop fastener of the present invention is characterized in that the splittable conjugate long fibers are made of a two-component thermoplastic polymer that is incompatible with each other.
[0007]
Further, the method for producing a nonwoven fabric for hook-and-loop fastener of the present invention comprises forming a long-fiber non-woven web layer with split-type composite long fibers, and laminating the long-fiber non-woven web layer and the short-fiber non-woven web layer. A nonwoven web is formed, and then the laminated nonwoven web is placed on a moving 10-20 mesh porous support plate and subjected to a pressurized liquid flow treatment, so that the constituent fibers of the long-fiber nonwoven web layer are mixed with the short fibers. The constituent fibers of the fiber non-woven web layer are three-dimensionally entangled with each other, and the constituent fibers of the short fiber non-woven web layer are three-dimensionally entangled with each other. 0.0mm2  The density of 15 to 60 holes / cm2  The gist is that it is provided by.
[0008]
As described above, the nonwoven fabric for a hook-and-loop fastener of the present invention has an area of 0 by performing a pressurized liquid flow treatment using a porous support plate composed of a 10 to 20 mesh (10 to 20 pieces / 1 inch) net. 0.5-3.0mm2  Holes are arranged at a density of 15 to 60 holes / cm2  When used as a hook-and-loop fastener, this hole acts as a female material loop, and the male material hook part is hooked into this hole, so that it can be detachably joined. is there.
[0009]
Further, the nonwoven fabric for hook-and-loop fastener of the present invention is characterized in that the constituent fibers of the long fiber nonwoven web layer and the constituent fibers of the short fiber nonwoven web layer are three-dimensionally entangled with each other, and the constituent fibers of the short fiber nonwoven web layer. Since these are nonwoven fabrics integrated as a whole by being three-dimensionally entangled with each other, they can have flexibility suitable for a fabric for a hook-and-loop fastener.
[0010]
Furthermore, since the nonwoven fabric for hook-and-loop fastener of the present invention is formed from splittable conjugate long fibers, the constituent fibers are divided into thin split fibers during the pressurized liquid flow treatment, so that many ultrafine fibers are formed. In particular, it has excellent flexibility and mechanical properties, and is suitable as a nonwoven fabric for hook-and-loop fasteners.
[0011]
ADVANTAGE OF THE INVENTION According to this invention, since the hole which replaces a loop is provided over the whole surface of a nonwoven fabric and can function as a female material of a hook-and-loop fastener, the male member of a hook-and-loop fastener can be joined to the arbitrary places of a nonwoven fabric, therefore this male material It is possible to provide a nonwoven fabric for a hook-and-loop fastener that can function as a hook-and-loop fastener only by fixing the male material to a specific portion of a joining target to which the hook-and-loop fastener is to be attached, and can appropriately respond to the purpose of use.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, the nonwoven fabric for hook-and-loop fastener of the present invention will be described in detail.
The long fibers constituting the long fiber nonwoven web layer applied to the present invention are made of two or more kinds of polymers selected from polyolefin-based polymers, polyester-based polymers, or polyamide-based polymers having fiber-forming properties. It becomes.
[0013]
Examples of the polyolefin polymer include a homopolyolefin polymer composed of an aliphatic α-monoolefin having 2 to 18 carbon atoms, for example, ethylene, propylene, 1-butene, 1-dodecene, and 1-octadecene. The aliphatic α-monoolefin is a polyolefin in which other ethylenically unsaturated monomers such as butadiene, isoprene, 1,3-pentadiene, styrene and α-methylstyrene are copolymerized. It may be a system copolymer. In the case of a polyethylene polymer, propylene, 1-butene, 1-hexene, 1-octene or a similar higher α-olefin is copolymerized with ethylene in a range of 10% by weight or less. In the case of a polypropylene-based polymer, ethylene or a similar higher α-olefin may be copolymerized with propylene in a range of 10% by weight or less. However, at this time, if the copolymerization ratio of these copolymers exceeds the above range, the melting point of the copolymer decreases, and when a non-woven fabric made of these copolymers is used under high-temperature conditions, It is not preferable because characteristics and dimensional stability are reduced.
[0014]
As the polyester-based polymer, terephthalic acid, isophthalic acid, aromatic dicarboxylic acids such as naphthalene-2,6-dicarboxylic acid, or adipic acid, aliphatic dicarboxylic acids such as sebacic acid or esters thereof as an acid component, Further, a homopolyester polymer containing a diol compound such as ethylene glycol, diethylene glycol, 1,4-butadiol, neopentyl glycol, and cyclohexane-1,4-dimethanol as an alcohol component, or a copolymer thereof may be used. In addition, paraoxybenzoic acid, 5-sodium sulfoisophthalic acid, polyalkylene glycol, pentaerythritol, bisphenol A, and the like may be added or copolymerized to these polyester polymers.
[0015]
Examples of polyamide polymers include polyimino-1-oxotetramethylene (nylon 4), polytetramethylene adipamide (nylon 46), polycapramide (nylon 6), polyhexamethylene adipamide (nylon 66), and polyundecana Polyamide (Nylon 11), Polylaurolactamide (Nylon 12), Polymethaxyleneadipamide, Polyparaxylylenedecanamide, Polybiscyclohexylmethanedecanamide, or a polyamide-based copolymer having these monomers as constituent units Is mentioned. In particular, when polytetramethylene adipamide is used, polytetramethylene obtained by copolymerizing other polyamide components such as polycapramide, polyhexamethylene adipamide and polyundecamethylene terephthalamide in a range of 30 mol% or less is used. It may be an adipamide copolymer. However, at this time, if the copolymerization ratio of the other polyamide component exceeds 30 mol%, the melting point of the copolymer decreases, and when a non-woven fabric made of these copolymers is used under high-temperature conditions, the mechanical properties are reduced. And the dimensional stability is reduced.
[0016]
In the present invention, the polymer constituting the long-fiber non-woven web layer may, if necessary, include, for example, a matting agent, a pigment, a flame retardant, a deodorant, a light stabilizer, a heat stabilizer, and an oxidizing agent. Various additives such as an inhibitor can be added as long as the effects of the present invention are not impaired.
[0017]
The long fibers constituting the long fiber nonwoven web layer applied to the present invention must have a splittable composite cross section. By making the long fibers into a splittable composite cross section, the constituent fibers are divided into thin split yarns during the pressurized liquid flow treatment to become a large number of ultrafine fibers, so that the flexibility of the obtained nonwoven fabric is particularly improved. In addition, since three-dimensional entanglement can be efficiently formed, it has excellent mechanical properties, and is suitable as a nonwoven fabric for hook-and-loop fasteners. Here, the split-type composite cross-section refers to a cross-section in which two different components are arranged adjacent to each other, for example, a multi-leaf in which a plurality of smaller leaves are arranged around one core. And a composite composite cross section in which two components are alternately arranged so as to be finely divided from each other.
[0018]
When an external force such as a pressurized liquid flow is applied to such a split-type composite cross-section yarn, adjacent portions of the two components are cracked to be split for each component, resulting in a split fine yarn having a fine fineness. This is because the two different components are not considered to be basically mixed with each other, and are considered to form different filaments from each other. It is preferable to select two components that are incompatible with each other among the plastic polymers.
[0019]
In the present invention, the long fibers constituting the long-fiber nonwoven web layer preferably have a single fiber fineness of 1.5 to 10.0 denier. If the single fiber fineness is less than 1.5 denier, the mechanical properties of the obtained non-woven fabric for hook-and-loop fastener may decrease, or the spinning property may decrease in the melt spinning process, and peeling off from the male hook-and-loop fastener material may occur. The repetition tends to cause fluff, and the bonding strength with the male material tends to be inferior. On the other hand, if the single-fiber fineness exceeds 10.0 denier, the texture of the obtained nonwoven fabric for hook-and-loop fastener tends to be hard, and the flexibility tends to decrease. Therefore, in the present invention, the single fiber fineness is preferably from 1.5 to 10.0 denier, more preferably from 2.0 to 8.0 denier.
[0020]
In the present invention, the basis weight of the long-fiber nonwoven web layer is 10 to 60 g / m2.2  It is preferred that The basis weight is 10 g / m2  If it is less than this, the degree of dense overlap between the long fibers is low, and the formation of the nonwoven fabric obtained by laminating the nonwoven web layer with the short fiber on this long fiber nonwoven web layer is not preferred. On the other hand, the basis weight is 60 g / m.2  When the short fiber nonwoven web layer is laminated on the long fiber nonwoven web layer and subjected to a pressurized liquid flow treatment, the constituent fibers of the long fiber nonwoven web layer and the constituent fibers of the short fiber nonwoven web layer Are not sufficiently entangled three-dimensionally, and thus are not integrated as a whole. Therefore, when the male member of the hook-and-loop fastener is separated from the obtained non-woven fabric for hook-and-loop fastener, delamination is likely to occur, which is not preferable. Therefore, the basis weight of the long fiber nonwoven web layer is 10 to 40 g / m2  Is particularly preferred.
[0021]
Examples of the short fibers constituting the short fiber nonwoven web layer applied to the present invention include natural fibers represented by cotton, recycled fibers obtained from pulp, and short fibers obtained from a thermoplastic polymer.
[0022]
In the present invention, as the cotton fiber, in addition to combed yarn that has not been subjected to bleaching, bleached cotton that has been subjected to bleaching processing, and the like, anti-hair obtained from cotton yarn, woven fabric or knitted fabric can be used. Here, examples of anti-hair machines that can effectively obtain anti-hair include a rag machine, a knot breaker, a garnet machine, a turning machine, and the like. The type and combination of anti-hair machines to be used depends on the shape of the fabric to be anti-haired, the thickness of the constituent yarns, the strength of twist, and the like. It is effective to use a combination of different types of anti-hair machines. The defibration rate by this anti-hair machine is preferably in the range of 50 to 95%. When the defibration ratio is less than 50%, unfibrillated fibers are present in the card web, and not only the roughness of the nonwoven fabric surface occurs, but also the pressurized liquid flow during the entanglement treatment does not sufficiently penetrate the web. Insufficient mutual entanglement of the constituent fibers of the short fiber nonwoven web layer or insufficient mutual entanglement of the constituent fibers of the long fiber nonwoven web layer and the constituent fibers of the short fiber nonwoven web layer. This is not preferable because the long fiber nonwoven web layer and the short fiber nonwoven web layer are easily peeled off. On the other hand, if the defibration rate exceeds 95%, a sufficient nonwoven fabric frictional strength cannot be obtained, which is not preferable. In addition, the defibration rate of the bristles is obtained by the following equation.
Fibrillation rate (%) = (weight of unhaired material−weight of unfibrillated material) × 100 / weight of unhaired hair
[0023]
As the material of the anti-hair obtained from cotton, woven / knitted fabric or fabric made of bleached cotton, dyed / printed material, woven / knitted material subjected to fluorescent treatment, or the like can be used.
[0024]
In the present invention, as regenerated fibers obtained from pulp, in addition to viscose rayon and cellulose acetate rayon, lyocell, which is a solvent-spun rayon, is used.
[0025]
In the present invention, the short fibers made of a thermoplastic polymer are those made of the same polymer as the thermoplastic synthetic polymer constituting the long fibers forming the long fiber nonwoven web layer.
[0026]
Examples of the short fiber nonwoven web layer in the present invention include a parallel card web, a random card web, and a cross laid web made of the above-mentioned short fiber material. Here, as the short fiber material, in addition to a single material selected from the above, a mixture of a plurality of types of materials may be used. The short fiber nonwoven web layer may be made of the same material as the long fiber nonwoven web layer.
[0027]
This short fiber nonwoven web layer has a basis weight of 10 to 60 g / m2.2  It is preferred that The basis weight is 10 g / m2  If it is less than 10%, the shape retention of a laminated nonwoven web is undesirably reduced. On the other hand, the basis weight is 60 g / m.2  Is exceeded, the three-dimensional confounding of the constituent fibers of the long fiber nonwoven web layer and the constituent fibers of the short fiber nonwoven web layer and the three-dimensional confounding of the constituent fibers of the short fiber nonwoven web layer are all When it is not formed sufficiently and peeling from the male member of the hook-and-loop fastener is repeated, the constituent fibers on the surface of the long fiber nonwoven web layer are peeled off and become fluffy, and the bonding strength with the male member becomes poor, which is not preferable.
[0028]
In the nonwoven fabric of the present invention, the short fiber nonwoven web layer is laminated on the long fiber nonwoven web layer, and the constituent fibers of the long fiber nonwoven web layer and the constituent fibers of the short fiber nonwoven web layer are mutually three-dimensional. And the constituent fibers of the short fiber nonwoven web layer are three-dimensionally entangled. In such a configuration, the short fiber nonwoven web layer mainly functions as a base cloth, and the long fiber nonwoven web layer mainly functions as a hook for hooking a male hook. For example, when the short fiber nonwoven web layer is hooked to the hook portion as a hook portion, the short fibers are fuzzed, and the obtained nonwoven fabric does not withstand repeated detachment.
[0029]
In the present invention, the nonwoven fabric suitable for such a hook-and-loop fastener fabric has an area of 0.5 to 3.0 mm.2  The density of 15 to 60 holes / cm2  It is important that it is disposed at least on the surface of the long fiber nonwoven web layer. The holes are formed at the same time as the constituent fibers are three-dimensionally entangled by the pressurized liquid flow treatment described later. Due to the existence of such a large number of holes, when the nonwoven fabric of the present invention is used as a hook-and-loop fastener, the holes function as hooks of the male material hooks, and the male material hooks are hooked on the holes, so that they can be detached. They can be joined freely. Further, since this hole is provided at least on the surface of the long-fiber nonwoven web layer, and the hook is hooked on the long-fiber nonwoven web layer side, as described above, when the hook is hooked on the hook as the hooking portion, fluffing occurs. It does not occur.
[0030]
Here, the area of one hole is 0.5 to 3.0 mm.2  Must. This area is 0.5mm2  If it is less than 3, the hole of the male material is difficult to be caught in the hole because the hole is too small, while the area is 3.0 mm.2  If it exceeds, the hole becomes too large and the hook portion of the male material is hooked but the bonding force is weak, and none of them can have a sufficient bonding force as a hook-and-loop fastener.
[0031]
Further, the arrangement density of the holes is 15 to 60 holes / cm.2  Must. The arrangement density of holes is 15 / cm2  If it is less than 1, the probability that the hook portion of the male material is caught in this hole is low, so that it is difficult to join as a hook-and-loop fastener, while the arrangement density of holes is 60 pieces / cm.2  If it exceeds, the form stability of the nonwoven fabric will be impaired, and both are not preferred.
[0032]
It should be noted that there is no particular limitation on whether or not the hole completely penetrates the nonwoven fabric, or on the depth of the hole when the hole does not penetrate the nonwoven fabric, as long as the hook portion of the male material can be hooked.
[0033]
Next, a method for producing the nonwoven fabric for hook-and-loop fastener of the present invention will be described.
The nonwoven fabric of the present invention comprises, for example, a laminated nonwoven web obtained by laminating a short fiber nonwoven web layer obtained by a conventional method on a long fiber nonwoven web layer composed of splittable composite long fibers formed by a spun bond method. The laminated nonwoven web is placed on a porous support plate made of a moving 10-20 mesh net and subjected to a pressurized liquid flow treatment, and the constituent fibers of the long fiber nonwoven web layer and the short fiber nonwoven web The constituent fibers of the layer are three-dimensionally entangled with each other, and the constituent fibers of the short-fiber nonwoven web layer are three-dimensionally entangled and integrated as a whole. 5-3.0mm2  The density of 15 to 60 holes / cm2  In this case, efficient production can be achieved.
[0034]
Specifically, first, a long fiber nonwoven web layer is manufactured by a spunbond method. That is, two or more polymers selected from the polyolefin-based polymers, polyester-based polymers or polyamide-based polymers having the above-mentioned fiber-forming properties were melted, spun through a composite spinneret, and spun. After cooling the polymer stream, it is pulled using a take-off means such as air soccer, opened, collected and deposited on a moving collection surface, and has a single fiber fineness of 1.5 to 8.0 denier. And a long-fiber non-woven web layer composed of single fibers having a split-type composite cross section.
[0035]
When pulling using the pulling means, it is preferable to set the pulling speed to 3000 to 6000 m / min. When the take-up speed is less than 3000 m / min, the mechanical properties and dimensional stability of the obtained web are not improved because the degree of molecular orientation of the long fiber is not sufficiently increased, while the take-up speed is 6,000 m / min. If the ratio exceeds the above range, the spinnability at the time of melt-spinning will be reduced, and neither is preferred.
[0036]
In the present invention, it is preferred that the long-fiber nonwoven web layer is subjected to partial thermal pressure welding in advance before lamination. Thereby, when the long fiber nonwoven web layer is laminated on the short fiber nonwoven web layer and subjected to the pressurized liquid flow treatment, the shape of the long fiber nonwoven web layer can be favorably maintained, and The resulting nonwoven fabric also has excellent mechanical strength. Further, at least a part of the thermal bonding points formed on the long-fiber nonwoven web layer is peeled off by a pressurized liquid flow treatment performed later, so that the flexibility of the obtained nonwoven fabric is not impaired.
[0037]
Here, the partial thermal pressing means that the engraved pattern is formed by passing a web between a heated roll having an engraved pattern imprinted on its surface, that is, an embossing roll, and a heated metal roll having a smooth surface. Means that the web constituting fibers of the portion corresponding to the above are thermally bonded to each other.
[0038]
More specifically, the location where the partial thermal pressure welding is performed has a specific area with respect to the entire surface area of the long fiber nonwoven web layer. That is, the individual heat-pressed areas do not necessarily have to have a circular shape, but have a diameter of 0.1 to 1.0 mm.2  Having an area of 2 to 80 points / cm2  , Preferably 4 to 60 points / cm2Good thing. This contact density is 2 points / cm2  If it is less than 10, the mechanical properties and the shape retention of the web after the thermal pressing are not improved, while the density of the pressure contact is 80 points / cm.2  If it exceeds, the majority of the long fiber nonwoven web layer is thermally fused, impairing the flexibility, and also the short fiber nonwoven web layer because the pressurized liquid flow does not penetrate the web when forming three-dimensional entanglement. Is inferior in confounding property, and delamination tends to occur when peeled from the male fastener material, which is not preferable. In addition, the ratio of the area of the entire heat-welded region to the entire surface area of the long-fiber nonwoven web layer, that is, the contact area ratio is preferably 2 to 30%, and more preferably 4 to 20%. If the pressed area ratio is less than 2%, the dimensional stability of the web after hot pressing is not improved, and the dimensional stability of the obtained nonwoven fabric for hook-and-loop fastener is poor. On the other hand, if the pressed area ratio exceeds 30%, most of the constituent fibers are heat-sealed, impairing the flexibility of the long-fiber nonwoven web layer, and the pressurized liquid flow causes the web to form a three-dimensional entanglement. Since it does not penetrate, it is not preferable because it has poor entanglement with the short fiber nonwoven web layer.
[0039]
When performing a partial heat-pressing treatment on the long-fiber non-woven web, the conditions of the embossing roll may be appropriately selected depending on the type of the polymer constituting the long fiber. When the melting point of the lowest melting point component among the components constituting the composite long fiber forming the long fiber nonwoven web layer is Tm ° C, the melting point is in the range of (Tm−30) ° C to (Tm + 10) ° C, and the embossing is performed. Roll pressure of 5 to 50 kg / cmWhenIs preferred. The conditions of the surface temperature and the linear pressure of the embossing roll are particularly important. If the surface temperature of the embossing roll exceeds (Tm + 10) ° C. or the linear pressure exceeds 50 kg / cm,Heat welding processMost of the long-fiber non-woven web layer isHeat fusionThis is not preferable because the flexibility is impaired, and the pressurized liquid flow does not penetrate the web when forming three-dimensional entanglement, so that the entanglement with the short fiber nonwoven web layer is poor. On the other hand, if the surface temperature of the embossing roll is less than (Tm-30) ° C. or the linear pressure is less than 5 kg / cm, the constituent fibers of the long-fiber nonwoven web hardly adhere to each other, and the pressurized liquid flow treatment is not performed. This is not preferable because the shape retention at the time is not sufficient.
[0040]
Next, after laminating a short fiber nonwoven web layer obtained from the short fibers by a conventional method on one side of the obtained long fiber nonwoven web layer, the laminated nonwoven web is added from the short fiber nonwoven web layer side. By subjecting the constituent fibers of the long-fiber nonwoven web layer and the constituent fibers of the short-fiber nonwoven web layer to three-dimensional entanglement with each other, and forming the short-fiber nonwoven web layer together, At the same time as three-dimensionally entangled and integrated as a whole, the area of the laminated nonwoven web is 0.5 to 3.0 mm.2  The density of 15 to 60 holes / cm2  To be provided.
[0041]
When performing the pressurized liquid flow treatment, for example, a large number of injection holes having a hole diameter of 0.05 to 2.0 mm, particularly 0.1 to 0.4 mm are arranged in one or a plurality of rows with a hole interval of 0.3 to 10 mm. Using an orifice head, injection pressure is 5 to 150 kg / cm2  A method of injecting the pressurized liquid stream of G from the injection hole is adopted. The injection holes are arranged in rows in a direction perpendicular to the direction of travel of the laminated nonwoven web. Generally, water or warm water is used as the pressurized liquid. The distance between the injection holes and the laminated nonwoven web is preferably between 1 and 15 cm. If this distance is less than 1 cm, the formation of the nonwoven fabric obtained by this treatment is disturbed, while if this distance exceeds 15 cm, the impact force when the liquid stream collides with the laminated nonwoven web is reduced, resulting in a three-dimensional structure. Neither is preferable since confounding is not sufficiently performed.
[0042]
The pressurized liquid flow treatment is preferably performed in at least two stages from the viewpoint of preventing disorder of the formation of the short fiber nonwoven web layer and unevenness in the weight of the short fiber nonwoven web layer generated when the pressurized liquid flow is ejected and collided. . First, as the first stage treatment, the pressure is 5 to 40 kg / cm.2  The pressurized liquid stream of G is ejected and collides with the short fiber nonwoven web layer side of the laminated nonwoven web to preliminarily entangle the constituent fibers of the short fiber nonwoven web layer. In this first stage treatment, the pressure of the liquid stream is 5 kg / cm2  If it is less than G, the constituent fibers of the short fiber nonwoven web layer cannot be preliminarily entangled with each other, while the pressure of the liquid flow is 40 kg / cm.2  When the pressure exceeds G, the constituent fibers of the short-fiber non-woven web layer are disturbed by the action of the liquid flow when the pressurized liquid flow is jetted and collided with the laminated non-woven web. Any of them is not preferable because it causes disturbance and spots.
[0043]
Next, as a process of the second stage, the pressure is 40 to 150 kg / cm.2  G. The pressurized liquid stream of G is ejected and collides with the laminated nonwoven web to cause the constituent fibers of the long fiber nonwoven web layer and the constituent fibers of the short fiber nonwoven web layer to be three-dimensionally entangled with each other. The constituent fibers of the fibrous nonwoven web layer are three-dimensionally entangled with each other, and the laminate is integrated as a whole. In this second stage treatment, the pressure of the liquid stream is 40 kg / cm2  If it is less than G, the three-dimensional entanglement between the fibers as described above cannot be sufficiently formed, while the pressure of the liquid flow is 150 kg / cm.2  If it exceeds G, the holes formed in the obtained nonwoven fabric become too large, so that the hooking of the male material as the female material with the hook portion becomes insufficient, and the bonding strength as the surface fastener becomes inferior. Not preferred. As described above, the pressure in the second stage treatment is 40 to 150 kg / cm.2  A pressurized liquid flow of G is used. In this case, the constituent fibers of the short fiber nonwoven web layer are preliminarily entangled with each other by the above-described first stage treatment. The constituent fibers are not disturbed by the action of the high-pressure liquid flow in the second stage, and the web layer is not disturbed in formation and unevenness in weight.
[0044]
In performing the pressurized liquid flow treatment, it is important that the support for supporting the laminate is a porous material composed of a 10 to 20 mesh net. Only by using such a support, it is possible to form a hole satisfying the area and the arrangement density as described above. If the mesh of the supporting material is less than 10 mesh, the holes formed by the pressurized liquid flow treatment become too large, the bonding force of the hook portion of the male material, which is caught, becomes weak, and the shape retention is also poor. Not suitable as hook-and-loop fastener. On the other hand, if the mesh of the support material exceeds 20 mesh, the arrangement density of the holes formed by the pressurized liquid flow treatment becomes too large, and the area of the holes becomes small. Not suitable as a fastener. The material of the support is not particularly limited.
[0045]
After performing the pressurized liquid flow treatment, it is necessary to remove excess moisture from the laminate after the treatment, and a known method can be employed for removing the excess moisture. For example, the excess water may be mechanically removed to some extent using a squeezing device such as a mangle roll, and the remaining water may be subsequently removed using a drying device such as a continuous hot air dryer.
[0046]
In addition, the nonwoven fabric of the present invention can be subjected to processing such as dyeing and printing as required.
[0047]
【Example】
Next, the present invention will be specifically described based on examples, but the present invention is not limited to only these examples.
The measurement of various characteristic values in the following examples was performed by the following method.
[0048]
(1) Melting point (° C.): Measured using a differential scanning calorimeter DSC-2 manufactured by Perkin Elmer Co. under the condition of a temperature rising rate of 20 ° C./min. Melting point (° C.).
[0049]
(2) Melt index (g / 10 minutes): Measured by the method described in ASTM-D-1238 (L).
[0050]
(3) Relative viscosity (a): A mixture of phenol and ethane tetrachloride in an equal weight was used as a solvent, and 0.5 g of a sample was dissolved in 100 cc of the solvent.
[0051]
(4) Relative viscosity (b): Measured under the conditions of 96% sulfuric acid and a temperature of 25 ° C.
[0052]
(5) Non-woven fabric weight (g / m2  ): A total of 10 sample pieces of 10 cm long × 10 cm wide were prepared from the sample in the standard state, and after reaching equilibrium moisture, the weight (g) of each sample piece was weighed, and the average of the obtained values was calculated. Unit area (m2  ) Per unit weight (g / m2  ).
[0053]
(6) Area of hole (mm2  ): Using a universal projector (PROFILE PROJECTOR V-12) manufactured by Nippon Kogaku Co., Ltd., measure the vertical and horizontal lengths of 50 arbitrary holes formed in the nonwoven fabric in mm units up to three decimal places. The pore area was calculated, and the average value was calculated as the pore area (mm2  ).
[0054]
(7) Arrangement density of holes (pcs / cm2  ): 1 cm each using a universal projector (PROFILE PROJECTOR V-12) manufactured by Nippon Kogaku Co., Ltd.2  The number of holes in the holes was counted at 10 points, and the average value was determined as the density of the holes (number / cm).2  ).
[0055]
(8) Tensile strength (kg / 5 cm width) and tensile elongation (%) of nonwoven fabric: Measured according to the method described in JIS-L-1096A. That is, a sample piece having a sample length of 15 cm and a sample width of 5 cm is created in the machine direction (MD) of the nonwoven fabric and the direction perpendicular to the machine direction (CD) by 10 points each, and the MD direction and CD of the nonwoven fabric are prepared for each sample piece. In the direction, the sample was stretched at a tensile speed of 10 cm / min using a constant-speed stretching type tensile tester (Tensilon UTM-4-1-100 manufactured by Toyo Baldwin Co., Ltd.) at a gripping interval of 10 cm between the samples. Then, the average value of the obtained load values at cutting (kg / 5 cm) was defined as tensile strength (kg / 5 cm width), and the average value of the elongation rate at cutting (%) was defined as tensile elongation (%).
[0056]
(9) Compression stiffness (g): A sample length of 10 cm and a sample width of 5 cm were prepared in total of 5 points, and each sample was bent in the lateral direction to form a cylindrical body, and each end was formed. The joined sample was used as a sample for measurement of compression stiffness. Next, each measurement sample was compressed at a compression rate of 5 cm / min using a constant-speed elongation type tensile tester (Tensilon UTM-4-1-100 manufactured by Toyo Baldwin Co., Ltd.) in the axial direction. The average value of the load values (g) was taken as the compression stiffness (g).
[0057]
(10) Bonding force with hook-and-loop fastener material: Using a hook-and-loop fastener (1QEFN-N25) manufactured by YKK as a hook-and-loop fastener male material, the bonding force with the nonwoven fabric and the attachment / detachment were repeated 20 times, and the following five-step evaluation was performed. went.
[0058]
5: Very good bonding strength.
4: Good bonding strength.
3: The bonding strength is slightly good.
2: The bonding strength is weak.
1: No bonding at all.
[0059]
(Example 1)
Using a polyethylene terephthalate polymer chip having a melting point of 259 ° C. and a relative viscosity of 1.38 and a polyethylene polymer chip having a melting point of 128 ° C. and a melt index value of 25 g / 10 minutes, split-type composite filament fibers were not spunbonded. A woven web layer was produced. That is, the two types of polymer chips are melted at a spinning temperature of 285 ° C., spun out through a split composite spinneret, and the melt-spun polymer stream is cooled. After being taken out in minutes, the fiber is opened using a corona discharge means, collected and deposited on a moving collecting surface to form a web having a single fiber fineness of 2.5 denier long fibers, and then the obtained web Is subjected to heat-pressure treatment to give a basis weight of 30 g / m2  A long fiber non-woven web layer was obtained. The area of 0.6mm2  Sculpture pattern has a pressure contact density of 20 points / cm2  In addition, an embossing roll and a metal roll having a smooth surface are disposed at a pressing area ratio of 15%, and the surface temperature of the embossing roll and the metal roll having a smooth surface is 115 ° C., and the linear pressure between both rolls is 30 kg. / Cm.
[0060]
As a short fiber nonwoven web layer, bleached cotton having an average fineness of 1.6 denier and an average fiber length of 22 mm was used, and the basis weight was 25 g / m2.2  Created a parallel card web. Then, this is laminated on one side of the above-mentioned long fiber nonwoven web layer, placed on a 20-mesh metal net moving with the short fiber nonwoven web layer facing upward, and subjected to three-dimensional confounding. Performed in stages. That is, as a pre-entanglement process, an orifice head in which injection holes having a hole diameter of 0.1 mm are arranged in a line at a hole interval of 0.6 mm was used, and an injection pressure of 40 kg was applied from a position 50 mm above the short fiber nonwoven web layer. / Cm2  The first stage of pre-entanglement was performed with the G pressurized liquid flow. Then, using the orifice head, the injection pressure was 70 kg / cm.2  G was applied four times to provide a second stage of confounding. Next, excess moisture is removed from the entangled laminated nonwoven web using a mangle, which is a known moisture removing device, and then dried at 90 ° C. using a suction band type dryer. Was. In the obtained nonwoven fabric, the fibers constituting the short fiber nonwoven web layer are entangled with each other, and the constituent fibers of the short fiber nonwoven web layer and the long fiber nonwoven web layer are three-dimensionally entangled with each other. And was densely integrated. The performance of the obtained nonwoven fabric is shown below.
[0061]
Weight: 55.4 g / m2
Hole area: 0.72mm2
Arrangement density of holes: 59.4 / cm2
Strong (MD): 8.5kg / 5cm width
Elongation (MD): 45.4%
Strong (CD): 4.6kg / 5cm width
Elongation (CD): 59.6%
Softness: 20g
Bonding strength with hook-and-loop fastener: 5
The obtained nonwoven fabric maintained a sufficient bonding force even when bonded to a male hook-and-loop fastener, was excellent in mechanical properties and flexibility, and could withstand practical use as a nonwoven fabric for hook-and-loop fasteners.
[0062]
(Example 2)
Using a polyethylene terephthalate polymer chip having a melting point of 259 ° C. and a relative viscosity (B) of 1.38 and nylon 6 having a melting point of 225 ° C. and a relative viscosity (B) of 2.56, the mixture is melted at a spinning temperature of 290 ° C. This is spun through a split-type composite spinneret, the melt-spun polymer stream is cooled, taken up using an air sucker at a take-up speed of 3200 m / min, and then opened and moved using corona discharge means. The web is collected and deposited on the collecting surface to form a web having long fibers with a single fiber fineness of 3.0 denier, and then the obtained web is subjected to a hot press treatment to obtain a basis weight of 25 g / m2.2  A long fiber non-woven web layer was obtained. The area of 0.25 mm2  Sculpture pattern is 16 points / cm2  In addition, an embossing roll and a metal roll having a smooth surface are disposed at a press contact area ratio of 15%, and the surface temperature of the embossing roll and the metal roll having a smooth surface is 200 ° C., and the linear pressure between both rolls is 50 kg. / Cm. The obtained long-fiber nonwoven web had the polymer components arranged in parallel in the yarn direction of the long fibers.
[0063]
As a short fiber nonwoven web layer, a basis weight of polyester short fiber (Type 101 manufactured by Nippon Ester Co., Ltd.) having an average fineness of 2.0 denier and an average fiber length of 51 mm is 25 g / m.2  Created a parallel card web. Then, this was laminated on one side of the above-mentioned long fiber nonwoven web layer, subjected to entanglement treatment under the same conditions as in Example 1 except that a 10-mesh polyester net was used, followed by drying treatment and nonwoven fabric. Got. The performance of the obtained nonwoven fabric is shown below.
[0064]
Weight: 50.6 g / m2
Hole area: 2.86 mm2
Arrangement density of holes: 15.6 / cm2
Strong (MD): 8.4kg / 5cm width
Elongation (MD): 53.5%
Strong (CD): 5.5kg / 5cm width
Elongation (CD): 69.5%
Softness: 20g
Bonding strength with hook-and-loop fastener: 5
The obtained nonwoven fabric maintained a sufficient bonding force even when bonded to a male hook-and-loop fastener, was excellent in mechanical properties and flexibility, and could withstand practical use as a non-woven fabric for hook-and-loop fasteners.
[0065]
(Comparative Example 1)
As the long fiber nonwoven web layer, the basis weight obtained under the same conditions as in Example 1 was 25 g / m 2.2  And a short fiber non-woven web layer made of bleached cotton (average fineness: 1.8 denier, average fiber length: 26 mm).2  A parallel card web was used.
[0066]
A short fiber nonwoven web layer is laminated on a long fiber nonwoven web layer, and a 30 mesh polyester net is used as a support, and the short fiber nonwoven web layer is placed on the net with the short fiber nonwoven web layer facing upward. 35 kg / cm for the first pre-entanglement treatment from the injection hole with a hole diameter of 0.12 mm 20 mm above the non-woven web layer2  The confounding is performed by applying the pressurized liquid flow of G, and subsequently, the second confounding treatment is performed at 70 kg / cm.2  The confounding was performed by the action of the pressurized liquid stream of G. The performance of the obtained nonwoven fabric is shown below.
[0067]
Weight: 54.8 g / m2
Hole area: 0.29mm2
Arrangement density of holes: 138.3 / cm2
Strong (MD): 7.3kg / 5cm width
Elongation (MD): 60.5%
Strong (CD): 5.2kg / 5cm width
Elongation (CD): 74.6%
Softness: 31g
Bonding strength with hook-and-loop fastener: 2
Although the obtained nonwoven fabric has excellent mechanical properties and flexibility, the holes formed are too small because of the use of the 30-mesh support, so that the hooks with the male hook portion are insufficient, and this Therefore, the bonding strength with the male member of the hook-and-loop fastener was inferior and was not suitable for the female member of the hook-and-loop fastener.
[0068]
(Comparative Example 2)
A nonwoven fabric was obtained under the same conditions as in Comparative Example 1, except that an 8-mesh polyester net was used as a support. The performance of the obtained nonwoven fabric is shown below.
[0069]
Weight: 52.8 g / m2
Hole area: 3.84 mm2
Arrangement density of holes: 9.7 / cm2
Strong (MD): 3.3kg / 5cm width
Elongation (MD): 50.5%
Strong (CD): 1.2kg / 5cm width
Elongation (CD): 58.6%
Softness: 35g
Bonding strength with hook-and-loop fastener: 2
The obtained nonwoven fabric had an excessively large hole formed by using an 8-mesh support, and was not suitable for a female material of a hook-and-loop fastener, although it was hooked to a hook portion of a male material but had a weak bonding force.
[0070]
【The invention's effect】
The nonwoven fabric for a hook-and-loop fastener according to the present invention is subjected to a pressurized liquid flow treatment using a porous support plate composed of a net of 10 to 20 mesh to have an area of 0.5 to 3.0 mm.2Holes are arranged at a density of 15 to 60 holes / cm2  When used as a hook-and-loop fastener, this hole acts as a female material loop, and the male material hook part is hooked into this hole, so that it can be detachably joined. is there.
[0071]
Further, the nonwoven fabric for hook-and-loop fastener of the present invention is characterized in that the constituent fibers of the long fiber nonwoven web layer and the constituent fibers of the short fiber nonwoven web layer are three-dimensionally entangled with each other, and the constituent fibers of the short fiber nonwoven web layer. Since these are nonwoven fabrics integrated as a whole by being three-dimensionally entangled with each other, they can have flexibility suitable for a fabric for a hook-and-loop fastener.
[0072]
Furthermore, since the nonwoven fabric for hook-and-loop fastener of the present invention is formed from splittable conjugate long fibers, the constituent fibers are divided into thin split fibers during the pressurized liquid flow treatment, so that many ultrafine fibers are formed. In particular, it has excellent flexibility and mechanical properties, and is suitable as a nonwoven fabric for hook-and-loop fasteners.
[0073]
Therefore, according to the present invention, the male member of the hook-and-loop fastener can be joined to an arbitrary portion because the male member of the hook-and-loop fastener can function as a female member of the hook-and-loop fastener by providing a hole instead of a loop over the entire surface of the nonwoven fabric. It is possible to provide a nonwoven fabric for a hook-and-loop fastener that can function as a hook-and-loop fastener only by fixing the male material to a specific portion of a joining target to which the to-be-attached part is to be attached, and can appropriately cope with a purpose of use.

Claims (3)

長繊維不織ウエブ層と短繊維不織ウエブ層とが積層されてなる面ファスナ用不織布であって、長繊維不織ウエブ層が分割型複合長繊維により形成されており、かつ長繊維不織ウエブ層の構成繊維と短繊維不織ウエブ層の構成繊維とが相互に三次元的に交絡するとともに短繊維不織ウエブ層の構成繊維同士が三次元的に交絡しており、かつ面積0.5〜3.0mm の孔が配設密度15〜60個/cm で少なくとも長繊維不織ウエブ層の表面に配設されてなることを特徴とする面ファスナ用不織布。A nonwoven fabric for a hook-and-loop fastener, wherein a long-fiber nonwoven web layer and a short-fiber nonwoven web layer are laminated, wherein the long-fiber nonwoven web layer is formed of splittable composite long fibers; The constituent fibers of the web layer and the constituent fibers of the short-fiber non-woven web layer are three-dimensionally entangled with each other, and the constituent fibers of the short-fiber non-woven web layer are three-dimensionally entangled. 5~3.0Mm 2 of holes arrangement density 15-60 pieces / cm 2 at least long fiber nonwoven web layer non-woven fabric surface fastener characterized by comprising disposed on the surface of the. 分割型複合長繊維が、互いに非相溶性を示す二成分の熱可塑性重合体からなることを特徴とする請求項1記載の面ファスナ用不織布。The nonwoven fabric for hook-and-loop fastener according to claim 1, wherein the splittable conjugate long fibers are made of a two-component thermoplastic polymer that is incompatible with each other. 分割型複合長繊維により長繊維不織ウエブ層を形成し、この長繊維不織ウエブ層と短繊維不織ウエブ層とを積層して積層不織ウエブを形成し、次いでこの積層不織ウエブを移動する10〜20メッシュの多孔性支持板上に載置して加圧液体流処理を施し、長繊維不織ウエブ層の構成繊維と短繊維不織ウエブ層の構成繊維とを相互に三次元的に交絡させるとともに短繊維不織ウエブ層の構成繊維同士を三次元的に交絡させ、同時に、積層不織ウエブに面積0.5〜3.0mm の孔を配設密度15〜60個/cm で設けることを特徴とする面ファスナ用不織布の製造方法。A long-fiber non-woven web layer is formed by the splittable composite long fibers, and the long-fiber non-woven web layer and the short-fiber non-woven web layer are laminated to form a laminated non-woven web. It is placed on a moving 10-20 mesh porous support plate and subjected to a pressurized liquid flow treatment, and the constituent fibers of the long-fiber nonwoven web layer and the short-fiber nonwoven web layer are mutually three-dimensional. manner with entangling the constituent fibers to each other of the short fibrous nonwoven web layer is three-dimensionally entangled, simultaneously, the hole area 0.5 to 3.0 mm 2 arrangement density 15 to 60 pieces in the stacking nonwoven web / A method for producing a non-woven fabric for hook-and-loop fastener, the method being provided in cm 2 .
JP443096A 1996-01-16 1996-01-16 Nonwoven fabric for hook-and-loop fastener and method for producing the same Expired - Fee Related JP3580626B2 (en)

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US9078793B2 (en) 2011-08-25 2015-07-14 Velcro Industries B.V. Hook-engageable loop fasteners and related systems and methods
BR112014004253B1 (en) 2011-08-25 2021-04-27 Velcro BVBA METHOD OF PRODUCE A FITTING FITTING PRODUCT IN SHEET SHEET AND KNITTING PRODUCT IN SHEET SHAPE
PL3311688T3 (en) * 2015-06-19 2021-12-27 Nitto Denko Corporation Female member for touch fastener
JP6735156B2 (en) * 2015-06-19 2020-08-05 日東電工株式会社 Surface fastener female member

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