JP4147440B2 - Hook-and-loop female material and manufacturing method thereof - Google Patents
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Description
【０００１】
【発明の属する技術分野】
本発明は、生活資材、土木資材等に使用される面ファスナー雌材及びその製造方法に関する。
【０００２】
【従来の技術】
従来から面ファスナーは、その利便性から衣類、靴、カーテン、オムツ等の生活資材、地盤改良用等の土木資材、簡易包装用等の産業資材を始めとする種々の分野で活用されている。面ファスナーは基本的にフック（雄材）とループ（雌材）から構成され、使用される用途、条件に応じて、雄材と雌材の形状、材質等が工夫され今日に至っている。
【０００３】
特に近年、雌材として不織布を利用したものがでてきている。長繊維不織布の表面に深さ０．２〜３mmのしわを１cm当り２〜４０個設けたものがあげられる（特開平６−３３３５９号公報）。しかし、この面ファスナー雌材は、長繊維の面に溝をつけたものにすぎないので、係合強さ、その耐久力も、引き抜き抵抗も小さいものであった。また、使い捨て分野においては短繊維不織布を単独で用いたものもあるが、ループの強さ、引き抜き抵抗が弱く、繰り返し使用される用途には不向きであった。これらの欠点を改善するために、繊維の太さを太くする、接着剤又は低融点繊維で固めるなどの工夫がなされたものがあるが、いずれも風合いが硬くなり、使用可能な用途が限定される問題があった。
この他、熱融着性複合繊維主体のウェブに連続シール部を形成し、片面が熱融着により緻密化された不織布が面ファスナー雌材として使用されることが紹介されている（特開平９−３１７号公報）。しかし、この場合、繰り返しの係合強さは保持されるものの、シール部が連続している為、不規則なしわ等が発生し品位が低下し、引っ張り強さや引き裂き強さなどの機械的特性も低下するなどの問題があった。さらに、長繊維ウエブと熱接着用長繊維ウエブとを三次元交絡させた後で、交絡した構成繊維同士を部分的に熱接着することが紹介されている（特開平９−１５８０２５号公報）。しかし、この場合、部分的な熱接着は構成繊維同士の点接着によるものであり熱接着された部分が溶融緻密化されていないため、係合強さの耐久性や毛羽立ちが不充分である事と、長繊維同士の積層であるため柔軟性に課題が残るなどの問題があった。
【０００４】
【発明が解決しようとする課題】
本発明は、前記欠点を解消し、繰り返し係合強さに優れ、かつ柔軟性にも優れ、毛羽立ちやしわなどが少なく品位が良好な衣料、使い捨てオムツ等の生活資材、地盤改良用等の土木資材、簡易包装用等の産業資材等に好適に使用される面ファスナー雌材及びその製造方法を提供するものである。
【０００５】
【課題を解決するための手段】
すなわち、本発明は、合成繊維からなる長繊維不織布Ａと芯／鞘構造を有する熱融着性複合短繊維不織布Ｂが互いに三次元的に交絡し、芯／鞘構造を有する熱融着性複合短繊維不織布Ｂの表面に長繊維不織布Ａの構成繊維からなる多数のループが形成され、不連続な溶融緻密化された部分の面積率が２〜３０％であることを特徴とする面ファスナー雌材である。
【０００６】
また、本発明は、合成繊維からなる長繊維不織布Ａと芯／鞘構造を有する熱融着性複合短繊維不織布Ｂを積層後、長繊維不織布Ａ側からニードルパンチを施し、芯／鞘構造を有する熱融着性複合短繊維不織布Ｂの表面に長繊維不織布Ａの構成繊維からなる多数のループが形成させた後、該積層体を不連続なパターンで溶融緻密化して前記ループを固定することを特徴とする面ファスナー雌材の製造方法である。
【０００７】
【発明の実施の形態】
本発明の面ファスナー雌材において、目付が３０〜３００g/m2である長繊維不織布Ａと鞘成分の融点が長繊維不織布Ａを構成する合成繊維の融点よりも６０℃以上低く、目付が長繊維不織布Ａの目付の３０〜７０％である芯／鞘構造を有する熱融着性複合短繊維不織布Ｂが互いに三次元的に交絡し、芯／鞘構造を有する熱融着性複合短繊維不織布Ｂの表面に長繊維不織布Ａの構成繊維からなる多数のループが１０〜１００個/cm2存在すること、ループの高さが０．３〜７mmの範囲にあること、長繊維不織布Ａを構成する合成繊維の太さが１〜２０デニールの範囲にあること、不連続な溶融緻密化された部分の面積率が２〜３０％であることが好ましい実施の形態である。
【０００８】
本発明の面ファスナー雌材は、合成繊維からなる長繊維不織布Ａと芯／鞘構造を有する熱融着性複合短繊維不織布Ｂを積層後、長繊維不織布Ａ側からニードルパンチを施し、芯／鞘構造を有する熱融着性複合短繊維不織布Ｂの表面に長繊維不織布Ａの構成繊維からなる多数のループが形成させた後、該積層体を不連続なパターンで溶融緻密化して前記ループを固定されているものであるが、長繊維不織布Ａを構成する合成繊維の素材としてはポリエチレンテレフタレート、ポリブチレンテレフタレートなどのポリエステル繊維、またはイソフタル酸を含む共重合ポリエステル繊維、または他の共重合ポリエステル繊維、またはポリエチレンテレフタレート等の変性物からなる繊維、または脂肪族もしくは芳香族ポリアミド繊維、またはオレフィン系繊維などがあげられる。これらの繊維の中でできるだけ高強力なものが係合強さの点から好ましい。
【０００９】
本発明における長繊維不織布の目付は３０〜３００g/m2が好ましい。３０g/m2未満になると繊維量が少なくなって係合強さが低下する傾向がある。また、３００g/m2を超えると硬くなって凹凸に対する型馴染みが悪くなる傾向がある。
【００１０】
本発明における長繊維不織布Aは、多数のループがフィラメントで形成されているため、引っ張り強さ、引き裂き強さに優れ、面ファスナー雌材として、係合強さが向上する。
【００１１】
本発明における芯／鞘構造を有する熱融着性複合短繊維不織布Ｂの鞘成分の融点は長繊維不織布Ａを構成する合成繊維の融点よりも６０℃以上低い事が好ましい。
芯／鞘構造を有する熱融着性複合短繊維不織布Ｂの鞘成分の融点が６０℃未満であると、長繊維不織布Ａと芯／鞘構造を有する熱融着性複合短繊維不織布Ｂを積層後、長繊維不織布Ａ側からニードルパンチを施し、芯／鞘構造を有する熱融着性複合短繊維不織布Ｂの表面に長繊維不織布Ａの構成繊維からなる多数のループが形成させた後、該積層体を不連続なパターンで溶融緻密化して前記ループを固定化する場合に、満足な溶融緻密化を行う為には処理条件を厳しくする必要があり、これによる長繊維不織布Ａの構成繊維からなる多数のループが適性なかたちで保持されなくなり係合強さを低下させたり、風合いが硬くなるため好ましくない。
【００１２】
本発明における芯／鞘構造を有する熱融着性複合短繊維不織布Ｂの目付は長繊維不織布Ａの目付の３０〜７０％であることが好ましい。芯／鞘構造を有する熱融着性複合短繊維不織布Ｂの目付が長繊維不織布Ａの目付の３０％未満であると、長繊維不織布Ａと芯／鞘構造を有する熱融着性複合短繊維不織布Ｂを積層後、長繊維不織布Ａ側からニードルパンチを施し、芯／鞘構造を有する熱融着性複合短繊維不織布Ｂの表面に長繊維不織布Ａの構成繊維からなる多数のループが形成させた後、該積層体を不連続なパターンで溶融緻密化して前記ループを固定化する場合に、溶融緻密化が不十分となり、繰り返し係合強さの低下や毛羽立ちが多くなり好ましくない。また、長繊維不織布Ａの目付の７０％を超える目付になると該積層体を不連続なパターンで溶融緻密化して前記ループを固定化する場合に、溶融緻密化の度合いが大きくなりすぎて係合強さが低下し好ましくない。
【００１３】
本発明における合成繊維からなる長繊維不織布Ａと芯／鞘構造を有する熱融着性複合短繊維不織布Ｂが互いに三次元的に交絡し、芯／鞘構造を有する熱融着性複合短繊維不織布Ｂの表面に長繊維不織布Ａの構成繊維からなる多数のループが存在する。該ループ数は１０〜１００個/cm2存在することが好ましい。ループ数が１０個/cm2未満になると面ファスナー雌材の係合強さが低下し易く、他方１００個/cm2を超えると本発明で得られた面ファスナーの強力が低下し易くなる傾向があり好ましくない。
【００１４】
本発明において合成繊維からなる長繊維不織布Ａと芯／鞘構造を有する熱融着性複合短繊維不織布Ｂが互いに三次元的に交絡し、芯／鞘構造を有する熱融着性複合短繊維不織布Ｂの表面に長繊維不織布Ａの構成繊維からなる多数のループが形成され、このループは雌材として雄材であるフックと係合するわけであるが、該ループは面ファスナー雌材の基部にしっかりと固定されなければならない。そのためには長繊維不織布の少なくとも一部を不連続なパターンで溶融緻密化することが必要であり、溶融緻密化された部分の長繊維不織布中に占める割合である面積率（溶融緻密化面積／長繊維不織布の全面積）×１００（％）が２〜３０％であり、好ましくは面積率がは５〜２５％である。不連続なパターンによる溶融緻密化は該長繊維不織布に対して多すぎても少なすぎても目的とするものが得られない。溶融緻密化の面積率が２％未満になると面ファスナー雄材と係合させた後、剥がした時に面ファスナー雄材の表面に面ファスナー雌材である長繊維不織布の繊維が付着し、結果として長繊維不織布の表面は毛羽立ち、強力が低下するため、係合強さが激しく低下し、繰り返し使用ができなくなる。他方、３０％を超えると面ファスナー雌材である長繊維不織布のループが寝たままで強く固着され、また、長繊維不織布表面が硬くなって面ファスナー雄材が面ファスナー雌材に貫入しにくくなるため、係合強さが著しく低下する。また、溶融緻密化のパターンを連続化させると、溶融緻密化時の溶融緻密化された部分と溶融緻密化されてない部分の収縮差等が発生し、それによる不規則なしわ等がでるため品位が低下し、また、溶融緻密化パターンが連続化すると、引っ張り強さや引き裂き強さなどの機械的特性も低下する。
【００１５】
本発明における合成繊維からなる長繊維不織布Ａと芯／鞘構造を有する熱融着性複合短繊維不織布Ｂが互いに三次元的に交絡し、芯／鞘構造を有する熱融着性複合短繊維不織布Ｂの表面に長繊維不織布Ａの構成繊維からなる多数のループは、高さが０．３〜７ｍｍが好ましい。高さが０．３ｍｍ未満になると係合強さが不足し易く、７ｍｍをこえるとループ自身が破壊されやすく、本発明で得られた面ファスナーの強力が低下して係合強さが不足する傾向がある。
【００１６】
本発明における長繊維不織布Aを構成する合成繊維のフィラメントの太さは１〜２０デニールの範囲が好ましい。１デニール未満になると単糸の強さが不足してループの強さが低下し易く、係合時に雄材によって切断される傾向がある。一方、２０デニールを超えると、ニードルパンチ加工時に繊維同士が絡みにくく、不織布全体の強さが十分に得られず、ループ数も少なくなって係合強さが低下する傾向がある。また、装着時にチクチク感が強くなり、用途が限定されるようになる。
【００１７】
次に、本発明の製造方法について説明する。本発明における製造方法は、合成繊維からなる長繊維不織布Ａと芯／鞘構造を有する熱融着性複合短繊維不織布Ｂを積層後、長繊維不織布Ａ側からニードルパンチを施し、芯／鞘構造を有する熱融着性複合短繊維不織布Ｂの表面に長繊維不織布Ａの構成繊維からなる多数のループが形成させた後、該積層体を不連続なパターンで溶融緻密化して前記ループを固定するものである。
【００１８】
本発明におけるループの形成はニードルパンチによるものが好ましい。ニードルパンチによるとループの大きさ、形状が安定して得られるからである。
【００１９】
ニードルパンチの条件は、フェルティングニードルは針番手３０〜４２の範囲が適当である。針番手が４３を超えると、加工時に針が折れ易く生産性が低下し、また長繊維不織布の中に折れた針が混入する可能性が高くなり、安全面からも好ましくない。針番手が３０未満になると、加工時に繊維との摩擦が大きくなり、結果として繊維が切断され易く、本発明で得られた面ファスナーの引張強さなどが低下する傾向がある。
【００２０】
合成繊維からなる長繊維不織布Ａと芯／鞘構造を有する熱融着性複合短繊維不織布Ｂを積層後、長繊維不織布Ａ側からニードルパンチを施し、芯／鞘構造を有する熱融着性複合短繊維不織布Ｂの表面に長繊維不織布Ａの構成繊維からなる多数のループが形成させた後、不連続なパターンで溶融緻密化する方法としては、少なくとも１つの彫刻ロールに対し、超音波融着する方法や芯／鞘構造を有する熱融着性複合短繊維不織布Ｂの鞘成分の融点以上の温度で熱圧着する方法などが挙げられる。
【実施例】
以下に本発明を実施例により説明するが、本発明はこれによって限定されるものではない。尚、本発明において用いた測定法は下記の通りである。
【００２１】
（イ）面ファスナー雌材の係合強さ(N／5cm幅)
ＪＩＳ−Ｌ３４１６−１９９４の６．４．２のはく離強さに準じて測定した。係合強さとして初期係合強さ（N／5cm幅)、８回脱着後の繰り返し係合強さ（N／5cm幅)を測定した。面ファスナーの重ね合わせ方法及び装着方法は幅５cmの試料の重ね合わせ長さＬを５cmとし、最大せん断荷重（Ｎ）を求め、係合強さ（N／5cm幅)と表示した。データは５枚の試験片の平均値で表した。その他は上記のＪＩＳ記載の方法によった。
【００２２】
（ロ）柔軟性（ｍｍ）
ＪＩＳ−Ｌ−１９０６ ４．７．１（カンチレバー法）に準じて剛軟度を測定した。１８０ｍｍ以下を合格とした。
【００２３】
（ハ）表面品位
表面の状態を目視により確認し、しわ等がなく品位の良好なものを○、そうでないものを×とした。
【００２４】
（ニ）ループの高さ（ｍｍ）
ニードルパンチ加工時に設定したベットプレートを貫通したフェルティングニードルの第１バーブの深さをループの高さとみて測定した。
【００２５】
（ホ）ループの個数（個／ｃｍ2）
ニードルパンチ加工時に設定したフェルティングニードルの打ちこみ本数をループの個数とみて測定した。
【００２６】
（ヘ）総合評価
◎は係合強さ、柔軟性、品位の点から特に優れているもの、○は優れているもの、△は普通、×は劣っているものを示した。
【００２７】
実施例、比較例及び従来例
固融粘度０．６５のポリエチレンテレフタレートを溶融紡糸後、エアサッカーにて牽引、細化してフィラメントを作成し、ネットコンベア上にランダムに堆積、捕集した後、エンボスロールで軽く圧着して太さ３．０デニールのフィラメントからなる長繊維不織布Ａを得た。一方、芯／鞘構造を有する熱融着性複合短繊維不織布Ｂはポリエチレンテレフタレートを芯に、融点１１０℃の変性ポリエステルを鞘にもつ２デニールで５１mmカット長の芯／鞘構造を有する熱融着性複合短繊維（東洋紡績（株）製ＥＥ７）を開繊ウエブ化後、熱圧着して得た。得られた長繊維不織布Ａと芯／鞘構造を有する熱融着性複合短繊維不織布Ｂを積層後、種々のフェルティングニードルを使用してニードルパンチを長繊維不織布Ａ側から行って、芯／鞘構造を有する熱融着性複合短繊維不織布Ｂを貫通させ、他方の面にループが出来るようにした。その後、種々の彫刻ロールに得られた積層不織布を添わせ、不連続な溶融緻密化を熱圧着（温度170℃、線圧40kg/cm）にて実施した。実施例６においては、不連続な溶融緻密化を熱圧着の代わりに超音波融着（周波数２０ｋＨｚ、振幅４０μの条件）で実施した。係合強さの評価は、雄材としてキノコ状のフック（（株）クラレ製マジロックＳ５００２）を用いて行った。その結果を表１〜３に示した。
【００２８】
尚、従来の長繊維不織布の片面にエンボス加工したもの（従来例１）、短繊維不織布にニードルパンチとエンボス加工したもの（従来例２）も同様に評価して表３に示した。
【００２９】
【表１】
【表２】
【表３】
実施例１、比較例１及び２から、長繊維不織布Ａの目付が３０〜３００g/m2 の範囲で係合強さ、柔軟性、表面品位が優れることがわかる。実施例１及び２、比較例３及び４から、合成繊維の太さが１〜２０デニールの範囲にあると、係合強さ、柔軟性、表面品位が優れることがわかる。実施例３、比較例５及び６よりフェルティングニードル番手が３０〜４２の範囲で係合強さ、柔軟性、表面品位が優れることがわかる。実施例４及び５、比較例７及び８から、ループの高さが０．３〜７mmの範囲にある場合、係合強さ、柔軟性、表面品位が優れることがわかる。また、実施例１、比較例９及び１０から、ループ個数が１０〜１００個/cm2存在する場合、係合強さ、柔軟性、表面品位が優れていることがわかる。この他、実施例１、比較例１１〜１３から、不連続な溶融緻密化された部分が面積率で２〜３０％有する場合に、係合強さ、柔軟性、表面品位が優れ、各特性のバランスがとれていることがわかる。
尚、従来例１、２では係合強さが十分でないことがわかる。
【００３３】
【発明の効果】
本発明によれば、初期及び繰り返しの係合強さに優れ、かつ柔軟性にも優れ、毛羽立ちやしわなどが少なく品位が良好な衣料、使い捨てオムツ等の生活資材、地盤改良用等の土木材、簡易包装用等の産業資材等に好適に使用される面ファスナー雌材が安定して得られる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hook-and-loop female member used for daily life materials, civil engineering materials, and the like, and a method for manufacturing the same.
[0002]
[Prior art]
Conventionally, hook-and-loop fasteners have been used in various fields such as daily life materials such as clothes, shoes, curtains, and diapers, civil engineering materials for ground improvement, and industrial materials such as simple packaging because of their convenience. A hook-and-loop fastener is basically composed of a hook (male material) and a loop (female material), and the shape and material of the male material and the female material have been devised according to the application and conditions used.
[0003]
In particular, in recent years, those using non-woven fabric as a female material have appeared. An example is one in which 2 to 40 wrinkles having a depth of 0.2 to 3 mm are provided on the surface of the long-fiber nonwoven fabric (Japanese Patent Laid-Open No. 6-33359). However, this female hook-and-loop fastener material is merely a grooved surface of the long fiber, and therefore has low engagement strength, durability, and pull-out resistance. In the disposable field, short fiber nonwoven fabrics may be used alone, but the loop strength and pulling resistance are weak, making them unsuitable for repeated use. In order to remedy these drawbacks, some devices have been devised, such as thickening the fiber, solidifying with adhesives or low melting point fibers, but all have a hard texture and limited use. There was a problem.
In addition, it has been introduced that a nonwoven fabric in which a continuous seal portion is formed on a web mainly composed of heat-fusible composite fibers and one side of which is densified by heat-sealing is used as a female surface fastener (Japanese Patent Laid-Open No. Hei 9). -317). However, in this case, the repeated engagement strength is maintained, but since the seal portion is continuous, irregular wrinkles, etc. occur and the quality deteriorates, and mechanical properties such as tensile strength and tear strength. There was a problem such as lowering. Furthermore, it has been introduced that a three-dimensional entanglement of a long fiber web and a long fiber web for thermal bonding is followed by partial thermal bonding of the entangled constituent fibers (Japanese Patent Laid-Open No. 9-1558025). However, in this case, the partial thermal bonding is due to point bonding between the constituent fibers, and the thermally bonded part is not melt-densified, so that the durability of the engagement strength and the fluffing are insufficient. In addition, there is a problem that a problem remains in flexibility because of the lamination of long fibers.
[0004]
[Problems to be solved by the invention]
The present invention eliminates the above-mentioned drawbacks, is excellent in repeated engagement strength, is excellent in flexibility, has good quality with less fuzz and wrinkles, etc., living materials such as disposable diapers, civil engineering for ground improvement, etc. Provided are a female material for a hook-and-loop fastener that is suitably used for materials, industrial materials such as simple packaging, and a method for producing the same.
[0005]
[Means for Solving the Problems]
That is, the present invention relates to a heat-fusible composite having a core / sheath structure in which a long-fiber nonwoven fabric A made of synthetic fibers and a heat-fusible composite short-fiber nonwoven fabric B having a core / sheath structure are entangled three-dimensionally. A hook-and-loop fastener female characterized in that a large number of loops made of constituent fibers of the long-fiber nonwoven fabric A are formed on the surface of the short-fiber nonwoven fabric B, and the area ratio of the discontinuous melt-densified portion is 2 to 30%. It is a material.
[0006]
In addition, the present invention provides a core / sheath structure by laminating a long-fiber nonwoven fabric A made of synthetic fibers and a heat-fusible composite short-fiber nonwoven fabric B having a core / sheath structure and then needle punching from the long-fiber nonwoven fabric A side. A plurality of loops made of constituent fibers of the long-fiber nonwoven fabric A are formed on the surface of the heat-fusible composite short-fiber nonwoven fabric B, and then the laminate is melt-densified in a discontinuous pattern to fix the loops. This is a method for manufacturing a female hook-and-loop fastener.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
In the surface fastener female material of the present invention, the melting point of the long fiber nonwoven fabric A having a basis weight of 30 to 300 g / m 2 and the sheath component is 60 ° C. lower than the melting point of the synthetic fiber constituting the long fiber nonwoven fabric A, and the basis weight is long. A heat-fusible composite short fiber nonwoven fabric B having a core / sheath structure having a core / sheath structure that is 30 to 70% of the basis weight of the fiber nonwoven fabric A is entangled three-dimensionally and has a core / sheath structure. There are 10 to 100 loops / cm 2 of the constituent fibers of the long-fiber nonwoven fabric A on the surface of B, the loop height is in the range of 0.3 to 7 mm, and the long-fiber nonwoven fabric A is configured. It is a preferred embodiment that the thickness of the synthetic fiber to be in the range of 1 to 20 denier and the area ratio of the discontinuous melt-densified portion is 2 to 30%.
[0008]
The surface fastener female material of the present invention is obtained by laminating a long-fiber nonwoven fabric A composed of synthetic fibers and a heat-fusible composite short-fiber nonwoven fabric B having a core / sheath structure, then needle punching from the long-fiber nonwoven fabric A side, After a plurality of loops made of the constituent fibers of the long-fiber nonwoven fabric A are formed on the surface of the heat-fusible composite short fiber nonwoven fabric B having a sheath structure, the laminate is melt-densified in a discontinuous pattern to form the loop. The material of the synthetic fiber constituting the long-fiber nonwoven fabric A, which is fixed, is a polyester fiber such as polyethylene terephthalate or polybutylene terephthalate, a copolymer polyester fiber containing isophthalic acid, or another copolymer polyester fiber. Or a fiber made of a modified product such as polyethylene terephthalate, an aliphatic or aromatic polyamide fiber, or an olefin Such as emissions-based fibers, and the like. Among these fibers, those having as high a strength as possible are preferable from the viewpoint of engagement strength.
[0009]
The basis weight of the long fiber nonwoven fabric in the present invention is preferably 30 to 300 g / m 2 . If it is less than 30 g / m 2, the amount of fibers tends to decrease and the engagement strength tends to decrease. On the other hand, if it exceeds 300 g / m 2 , the mold tends to become hard and the familiarity with the unevenness tends to deteriorate.
[0010]
In the long-fiber nonwoven fabric A of the present invention, since many loops are formed of filaments, the tensile strength and tear strength are excellent, and the engagement strength is improved as a surface fastener female material.
[0011]
The melting point of the sheath component of the heat-fusible composite short fiber nonwoven fabric B having a core / sheath structure in the present invention is preferably 60 ° C. or lower than the melting point of the synthetic fiber constituting the long fiber nonwoven fabric A.
When the melting point of the sheath component of the heat-fusible composite short fiber nonwoven fabric B having a core / sheath structure is less than 60 ° C., the long fiber nonwoven fabric A and the heat-fusible composite short fiber nonwoven fabric B having a core / sheath structure are laminated. Thereafter, needle punching is performed from the long-fiber nonwoven fabric A side, and a plurality of loops composed of the constituent fibers of the long-fiber nonwoven fabric A are formed on the surface of the heat-fusible composite short-fiber nonwoven fabric B having a core / sheath structure. When the laminate is melt-densified in a discontinuous pattern and the loop is fixed, it is necessary to tighten the processing conditions in order to perform satisfactory melt-densification. This is not preferable because a large number of loops are not held in an appropriate manner and the engagement strength is lowered or the texture becomes hard.
[0012]
The basis weight of the heat-fusible composite short fiber nonwoven fabric B having a core / sheath structure in the present invention is preferably 30 to 70% of the basis weight of the long fiber nonwoven fabric A. When the basis weight of the heat-fusible composite short fiber nonwoven fabric B having a core / sheath structure is less than 30% of the basis weight of the long-fiber nonwoven fabric A, the heat-fusible composite short fiber having a core / sheath structure After the non-woven fabric B is laminated, needle punching is performed from the long-fiber non-woven fabric A side, and a plurality of loops composed of the constituent fibers of the long-fiber non-woven fabric A are formed on the surface of the heat-fusible composite short-fiber non-woven fabric B having a core / sheath structure. After that, when the laminate is melt-densified in a discontinuous pattern to fix the loop, the melt-densification becomes insufficient, and the repeated engagement strength decreases and fuzz increases, which is not preferable. Further, when the basis weight of the long-fiber nonwoven fabric A exceeds 70%, the laminate is melt-densified in a discontinuous pattern to fix the loop, and the degree of melt-densification becomes too large to engage. The strength decreases, which is not preferable.
[0013]
The heat-fusible composite short fiber nonwoven fabric having a core / sheath structure in which the long-fiber nonwoven fabric A made of synthetic fibers and the heat-fusible composite short fiber nonwoven fabric B having a core / sheath structure are entangled three-dimensionally. On the surface of B, there are a large number of loops composed of the constituent fibers of the long-fiber nonwoven fabric A. The number of loops is preferably 10 to 100 / cm2. When the number of loops is less than 10 pieces / cm 2 , the engaging strength of the hook-and-loop fastener female material tends to decrease, and when it exceeds 100 pieces / cm 2 , the strength of the hook-and-loop fastener obtained in the present invention tends to decrease. Is not preferable.
[0014]
In the present invention, the long-fiber nonwoven fabric A composed of synthetic fibers and the heat-fusible composite short fiber nonwoven fabric B having a core / sheath structure are entangled three-dimensionally, and the heat-fusible composite short fiber nonwoven fabric having a core / sheath structure A large number of loops made of constituent fibers of the long-fiber nonwoven fabric A are formed on the surface of B, and these loops engage with a hook which is a male material as a female material, and the loop is firmly attached to the base of the hook-and-loop female material. And must be fixed. For this purpose, it is necessary to melt and densify at least a part of the long fiber nonwoven fabric in a discontinuous pattern, and the area ratio (melt densified area / The total area of the long-fiber nonwoven fabric) × 100 (%) is 2 to 30%, and preferably the area ratio is 5 to 25%. Melting and densification by a discontinuous pattern will not provide the intended product if it is too much or too little of the long fiber nonwoven fabric. When the area ratio of melt densification is less than 2%, the fiber of the long-fiber nonwoven fabric, which is a female surface fastener, adheres to the surface of the surface fastener male material after being engaged with the surface fastener male material and peeled off. Since the surface of the non-woven fabric is fuzzy and the strength is reduced, the engagement strength is drastically reduced, and it cannot be used repeatedly. On the other hand, if it exceeds 30%, the loop of the long-fiber nonwoven fabric, which is a female hook-and-loop fastener, is firmly fixed while lying, and the surface of the long-fiber non-woven fabric becomes hard and the male hook-and-loop fastener material is difficult to penetrate into the female hook-and-loop fastener material. The engagement strength is significantly reduced. In addition, if the pattern of melt densification is continuous, a difference in shrinkage between the melt-densified part and the non-melt-densified part at the time of melt densification occurs, resulting in irregular wrinkles, etc. When the quality is lowered and the melt-densification pattern is continuous, mechanical properties such as tensile strength and tear strength are also lowered.
[0015]
The heat-fusible composite short fiber nonwoven fabric having a core / sheath structure in which the long-fiber nonwoven fabric A made of synthetic fibers and the heat-fusible composite short fiber nonwoven fabric B having a core / sheath structure are entangled three-dimensionally. The number of loops made of constituent fibers of the long-fiber nonwoven fabric A on the surface of B is preferably 0.3 to 7 mm in height. When the height is less than 0.3 mm, the engagement strength tends to be insufficient, and when it exceeds 7 mm, the loop itself is easily broken, and the strength of the hook-and-loop fastener obtained in the present invention is lowered and the engagement strength is insufficient. Tend.
[0016]
The filament thickness of the synthetic fiber constituting the long fiber nonwoven fabric A in the present invention is preferably in the range of 1 to 20 denier. If it is less than 1 denier, the strength of the single yarn is insufficient and the strength of the loop tends to decrease, and there is a tendency to be cut by the male material at the time of engagement. On the other hand, if it exceeds 20 deniers, the fibers are less likely to be entangled during needle punching, the strength of the entire nonwoven fabric cannot be sufficiently obtained, the number of loops is reduced, and the engagement strength tends to decrease. In addition, the tingling sensation increases when worn, and the application is limited.
[0017]
Next, the manufacturing method of this invention is demonstrated. In the production method of the present invention, a long fiber nonwoven fabric A composed of synthetic fibers and a heat-fusible composite short fiber nonwoven fabric B having a core / sheath structure are laminated, and then needle punching is performed from the long fiber nonwoven fabric A side to obtain a core / sheath structure. After forming a large number of loops made of constituent fibers of the long-fiber nonwoven fabric A on the surface of the heat-fusible composite short-fiber nonwoven fabric B having the above, the laminate is melt-densified in a discontinuous pattern to fix the loops Is.
[0018]
In the present invention, the loop is preferably formed by needle punching. This is because according to the needle punch, the size and shape of the loop can be obtained stably.
[0019]
The condition of the needle punch is appropriately in the range of the needle counts 30 to 42 for the felting needle. When the needle count exceeds 43, the needle is easily broken during processing, the productivity is lowered, and there is a high possibility that the broken needle is mixed into the long fiber nonwoven fabric, which is not preferable from the viewpoint of safety. When the needle count is less than 30, the friction with the fiber increases during processing, and as a result, the fiber is easily cut, and the tensile strength and the like of the hook-and-loop fastener obtained in the present invention tend to decrease.
[0020]
After laminating the long-fiber nonwoven fabric A composed of synthetic fibers and the heat-fusible composite short fiber nonwoven fabric B having a core / sheath structure, needle punching is performed from the long-fiber nonwoven fabric A side to form a heat-fusible composite having a core / sheath structure. After forming a large number of loops composed of the constituent fibers of the long fiber nonwoven fabric A on the surface of the short fiber nonwoven fabric B, as a method of melting and densifying in a discontinuous pattern, ultrasonic fusion is applied to at least one engraving roll. And a method of thermocompression bonding at a temperature equal to or higher than the melting point of the sheath component of the heat-fusible composite short fiber nonwoven fabric B having a core / sheath structure.
【Example】
EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited thereto. The measurement method used in the present invention is as follows.
[0021]
(I) Engagement strength of female hook-and-loop fastener material (N / 5cm width)
It measured according to the peel strength of 6.4.2 of JIS-L3416-1994. As the engagement strength, the initial engagement strength (N / 5 cm width) and the repeated engagement strength (N / 5 cm width) after 8 times of desorption were measured. The method of superimposing and attaching the hook-and-loop fastener was such that the superposition length L of a sample having a width of 5 cm was 5 cm, the maximum shear load (N) was determined, and the engagement strength (N / 5 cm width) was displayed. Data was expressed as an average value of five test pieces. Others were based on the method described in JIS.
[0022]
(B) Flexibility (mm)
The bending resistance was measured according to JIS-L-1906 4.7.1 (cantilever method). 180 mm or less was regarded as acceptable.
[0023]
(C) Surface quality The condition of the surface was confirmed by visual observation, and those having no wrinkles or the like and having good quality were marked with ◯, and those with no quality were marked with x.
[0024]
(D) Loop height (mm)
The depth of the 1st barb of the felting needle which penetrated the bed plate set at the time of needle punching was considered as the height of the loop.
[0025]
(E) Number of loops (pieces / cm 2 )
The number of felting needles set at the time of needle punching was measured as the number of loops.
[0026]
(F) Comprehensive evaluation A indicates particularly excellent in terms of engagement strength, flexibility, and quality, ○ indicates excellent, Δ indicates normal, and X indicates inferior.
[0027]
Example, Comparative Example and Conventional Example Polyethylene terephthalate having a solid melt viscosity of 0.65 was melt spun, then pulled by air soccer, thinned to create a filament, randomly deposited on a net conveyor, collected, and then embossed A long-fiber non-woven fabric A composed of filaments having a thickness of 3.0 denier was obtained by lightly pressing with a roll. On the other hand, the heat-fusible composite short fiber non-woven fabric B having a core / sheath structure has a core / sheath structure having a core / sheath structure of 2 denier and having a cut length of 51 mm with polyethylene terephthalate as a core and a modified polyester having a melting point of 110 ° C. as a sheath. The composite short fiber (EE7 manufactured by Toyobo Co., Ltd.) was made into a spread web and obtained by thermocompression bonding. After laminating the obtained long-fiber nonwoven fabric A and the heat-fusible composite short-fiber nonwoven fabric B having a core / sheath structure, needle punching is performed from the long-fiber nonwoven fabric A side using various felting needles. A heat-fusible composite short fiber nonwoven fabric B having a sheath structure was allowed to penetrate, and a loop was formed on the other surface. Thereafter, the laminated nonwoven fabrics obtained were added to various engraving rolls, and discontinuous melt densification was performed by thermocompression bonding (temperature 170 ° C., linear pressure 40 kg / cm). In Example 6, discontinuous melt densification was performed by ultrasonic fusion (conditions of frequency 20 kHz and amplitude 40 μ) instead of thermocompression bonding. The engagement strength was evaluated using a mushroom-like hook (Maglock S5002 manufactured by Kuraray Co., Ltd.) as a male material. The results are shown in Tables 1-3.
[0028]
A conventional long fiber nonwoven fabric embossed on one side (conventional example 1) and a short fiber nonwoven fabric embossed with a needle punch (conventional example 2) were similarly evaluated and shown in Table 3.
[0029]
[Table 1]
[Table 2]
[Table 3]
From Example 1 and Comparative Examples 1 and 2, it is understood that the engagement strength, flexibility, and surface quality are excellent when the basis weight of the long-fiber nonwoven fabric A is in the range of 30 to 300 g / m 2 . From Examples 1 and 2 and Comparative Examples 3 and 4, it can be seen that when the thickness of the synthetic fiber is in the range of 1 to 20 denier, the engagement strength, flexibility, and surface quality are excellent. From Example 3 and Comparative Examples 5 and 6, it can be seen that the engagement strength, flexibility, and surface quality are excellent when the felting needle count is in the range of 30 to 42. From Examples 4 and 5 and Comparative Examples 7 and 8, it can be seen that when the loop height is in the range of 0.3 to 7 mm, the engagement strength, flexibility, and surface quality are excellent. Further, from Example 1 and Comparative Examples 9 and 10, it can be seen that when the number of loops is 10 to 100 / cm 2 , the engagement strength, flexibility, and surface quality are excellent. In addition, from Example 1 and Comparative Examples 11 to 13, when the discontinuous melt-densified part has an area ratio of 2 to 30%, the engagement strength, flexibility, and surface quality are excellent, and each characteristic It can be seen that is balanced.
In addition, it turns out that engagement strength is not enough in the prior art examples 1 and 2.
[0033]
【The invention's effect】
According to the present invention, it is excellent in initial and repeated engagement strength, is excellent in flexibility, has good quality with less fuzz and wrinkles, etc., living materials such as disposable diapers, earth and wood for ground improvement, etc. A surface fastener female material suitably used for industrial materials for simple packaging and the like can be stably obtained.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17292099A JP4147440B2 (en) | 1999-06-18 | 1999-06-18 | Hook-and-loop female material and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17292099A JP4147440B2 (en) | 1999-06-18 | 1999-06-18 | Hook-and-loop female material and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001000212A JP2001000212A (en) | 2001-01-09 |
| JP4147440B2 true JP4147440B2 (en) | 2008-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17292099A Expired - Fee Related JP4147440B2 (en) | 1999-06-18 | 1999-06-18 | Hook-and-loop female material and manufacturing method thereof |
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| Country | Link |
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| JP (1) | JP4147440B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7640637B2 (en) * | 2005-11-01 | 2010-01-05 | Kimberly-Clark Worldwide, Inc. | Methods to modify the fibrous landing layer of a foam based fastener and products made from the same |
| EP2152948B1 (en) | 2007-06-07 | 2014-03-19 | Velcro Industries B.V. | Anchoring loops of fibers needled into a carrier sheet |
| EP2747726B1 (en) | 2011-08-25 | 2015-10-28 | Velcro Industries B.V. | Hook-engageable loop fasteners and related systems and methods |
| US9119443B2 (en) | 2011-08-25 | 2015-09-01 | Velcro Industries B.V. | Loop-engageable fasteners and related systems and methods |
| JP7046476B2 (en) | 2015-06-19 | 2022-04-04 | 日東電工株式会社 | Hook-and-loop fastener female member |
| WO2016204132A1 (en) * | 2015-06-19 | 2016-12-22 | 日東電工株式会社 | 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 |
| JP7295495B2 (en) | 2019-03-29 | 2023-06-21 | Jnc株式会社 | Nonwoven fabric containing composite fiber and method for producing the same |
-
1999
- 1999-06-18 JP JP17292099A patent/JP4147440B2/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| JP2001000212A (en) | 2001-01-09 |
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