JP3181195B2 - Nonwoven fabric and surface fastener female material having irregularities on the surface and method for producing the same - Google Patents
Nonwoven fabric and surface fastener female material having irregularities on the surface and method for producing the sameInfo
- Publication number
- JP3181195B2 JP3181195B2 JP15506295A JP15506295A JP3181195B2 JP 3181195 B2 JP3181195 B2 JP 3181195B2 JP 15506295 A JP15506295 A JP 15506295A JP 15506295 A JP15506295 A JP 15506295A JP 3181195 B2 JP3181195 B2 JP 3181195B2
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- heat
- nonwoven fabric
- shrinkable
- fiber layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は、面ファスナー雌材、特
に使い捨ておむつのようなディスポーザブル商品に好適
な、表面に凹凸を有する不織布と面ファスナー雌材及び
その製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a female fastener material, particularly to a nonwoven fabric having surface irregularities and a female fastener material suitable for disposable products such as disposable diapers, and a method for producing the same.
【０００２】[0002]
【従来の技術】通常、面ファスナーは、ループ型の雌材
と、雌材と係合する鈎型、またはきのこ型などのフック
部を有する雌材からなる。面ファスナーは簡便に使用す
ることができるため、衣料、靴、鞄、日用品などの開閉
部、あるいは車両の座席カバーの取り付け部等に設けら
れ、多くの分野で広く使用されている。また、最近では
使い捨ておむつを固着または固定させるべく、面ファス
ナー雌材をおむつのウエスト部に貼付したものも提案さ
れ、実用に供されている。2. Description of the Related Art Normally, a hook-and-loop fastener is composed of a female member having a loop shape and a female member having a hook portion such as a hook or a mushroom that engages with the female member. Since the hook-and-loop fastener can be used easily, it is provided in an opening / closing section of clothing, shoes, bags, daily necessities, or the like, or a mounting section of a vehicle seat cover, and is widely used in many fields. In addition, recently, in order to fix or fix a disposable diaper, a female fastener having a hook-and-loop fastener attached to a waist portion of the diaper has been proposed and put to practical use.
【０００３】一般に面ファスナー雌材としては、合成樹
脂のモノフィラメントやマルチフィラメントから形成さ
れたループが織編物の片面から突出したシートが汎用さ
れている。このような雌材は、雌材との係合力が非常に
強く、またその係合力は繰り返しの使用にも衰えること
がないために有用なものである。In general, a sheet material in which a loop formed of a synthetic resin monofilament or multifilament projects from one side of a woven or knitted fabric is generally used as a surface fastener female material. Such a female material is useful because the engaging force with the female material is very strong, and the engaging force does not deteriorate even after repeated use.
【０００４】しかし、そのような雌材を使い捨ておむつ
などに使用するのは不向きである。すなわち、上記のよ
うなループが織編物から突出した構造を有する雌材は、
一般に嵩が高くて柔軟性に欠けるため、おむつの着用者
に違和感を与えかねないからである。また、そのような
雌材の製造コストは一般的に高くつくために、価格競争
の激しいディスポーザブル商品においてそのような雌材
を使用することは現実的ではなく、ファスナーの係合力
よりもむしろ製造コストのほうを重視するのが合理的で
ある。However, it is not suitable to use such a female material for a disposable diaper or the like. That is, the female material having a structure in which the loop protrudes from the woven or knitted fabric,
This is because the diaper is generally bulky and lacks flexibility, which may give a diaper wearer an uncomfortable feeling. Also, because the cost of manufacturing such female materials is generally high, it is impractical to use such female materials in competitively priced disposable goods, and the cost of manufacturing rather than the engaging force of the fasteners It is reasonable to prioritize.
【０００５】そこで、従来から製造コストを重視した面
ファスナーが種々提案されてきた。例えば、特開昭６２
−３８１０５号公報では、不織シートにステッチングを
行い不織布シートにループを突出させた面ファスナー部
材が提案されている。また、特開平４−１０５６０２号
公報においては、流体攪乱処理により表面に多数にルー
プ、コイル等を有するマルチフィラメント糸条を布帛に
挿入することにより十分な係合力を有しかつ嵩高でない
面ファスナー雌材を得ることができることが開示されて
いる。また、特開平６−３３３５９号公報では、表面に
多数の皺を形成させた長繊維不織布からなる面ファスナ
ー雌材が開示されている。In view of the above, various hook-and-loop fasteners have been conventionally proposed with emphasis on manufacturing costs. For example, JP
Japanese Patent No. 38105 discloses a hook-and-loop fastener member in which a nonwoven sheet is stitched and a loop is projected from a nonwoven sheet. In Japanese Patent Application Laid-Open No. 4-105602, a multi-filament yarn having a large number of loops, coils, and the like on a surface thereof is inserted into a fabric by a fluid disturbance treatment to thereby provide a sufficient fastening force and a non-bulky surface fastener female. It is disclosed that a material can be obtained. Japanese Patent Application Laid-Open No. Hei 6-33359 discloses a female surface fastener made of a long-fiber nonwoven fabric having a large number of wrinkles formed on the surface.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、これら
の面ファスナー雌材には、以下のような不都合な点があ
る。例えば、特開昭６２−３８１０５号公報で示されて
いるファスナー部材は、係合力の点では問題はないが、
不織布にステッチングを行うために、製造コストが高く
なり、価格競争の激しいディスポーザブル商品には依然
不向きである。同じく、特開平４−１０５６０２号公報
に記載されているものも、剥離強力、引張強力に関して
は特に問題はないが、特定のマルチフィラメントを１本
以上用いて製織する必要があるために、製造コストが高
くなる。一方、特開平６−３３３５９号公報で示された
長繊維不織布は安価に製造することができ、いわゆるデ
ィスポーザブル商品に適したものであるが、雄材との係
合力が弱く、おむつに使用された場合、人の動きによっ
て離脱しやすいという問題点がある。However, these female fasteners have the following disadvantages. For example, the fastener member disclosed in JP-A-62-38105 has no problem in terms of engagement force,
Since stitching is performed on the nonwoven fabric, the production cost is high, and it is still unsuitable for disposable products in which price competition is fierce. Similarly, Japanese Unexamined Patent Publication (Kokai) No. 4-105602 also has no particular problem with respect to peel strength and tensile strength, but it is necessary to weave using at least one specific multifilament. Will be higher. On the other hand, the long-fiber nonwoven fabric disclosed in JP-A-6-33359 can be manufactured at low cost and is suitable for so-called disposable products. However, when the nonwoven fabric has a weak engaging force with a male material and is used for a diaper, However, there is a problem that the person is easily detached by the movement of a person.
【０００７】本発明は、前記従来の問題を解決するた
め、柔軟で係合力が高くかつコストの安い面ファスナー
雌材に適した表面に凹凸を有する不織布、及び面ファス
ナー雌材並びにその製造方法を提供することを目的とす
る。[0007] In order to solve the above-mentioned conventional problems, the present invention provides a nonwoven fabric having an uneven surface on a surface suitable for a female fastener material which is flexible, has a high engaging force and is inexpensive, a female fastener material, and a method of manufacturing the same. The purpose is to provide.
【０００８】[0008]
【課題を解決するための手段】前記目的を達成するた
め、本発明の表面に凹凸を有する不織布は、熱収縮した
繊維を含む第一繊維層の片面もしくは両面に、非収縮性
短繊維を含む第二繊維層が積層されてなる不織布であっ
て、前記両繊維層は部分的に熱融着部により厚さ方向に
一体化され、かつ各熱融着部の間では前記第一繊維層の
熱収縮により、前記第二繊維層が表層部分に突出して規
則的な凸部を形成していることを特徴とする。In order to achieve the above object, the nonwoven fabric having irregularities on its surface according to the present invention has a non-shrinkable nonwoven fabric on one or both surfaces of a first fiber layer containing heat-shrinkable fibers.
A nonwoven fabric in which a second fiber layer containing short fibers is laminated, wherein the two fiber layers are partially integrated in the thickness direction by a heat-sealed portion, and the second portion between the heat-sealed portions . One fiber layer
Due to the heat shrinkage , the second fiber layer protrudes to the surface layer and is regulated.
It is characterized by forming regular projections.
【０００９】前記不織布の発明においては、第一繊維層
は最大熱収縮率が少なくとも５０％である熱収縮性繊維
が熱収縮した繊維を５０重量％以上含み、第二繊維層は
前記熱収縮性繊維が収縮する温度では実質的に熱収縮し
ない非収縮性短繊維からなり、かつ第一繊維層もしくは
第二繊維層の少なくとも一方の繊維層に熱融着性繊維が
不織布中３０重量％以上含まれており、両繊維層は前記
熱融着繊維により部分的に熱融着していることが好まし
い。In the invention of the nonwoven fabric, the first fiber layer contains at least 50% by weight of a heat-shrinkable fiber having a maximum heat shrinkage of at least 50%, and the second fiber layer contains the heat-shrinkable fiber. A non-shrinkable short fiber that does not substantially heat shrink at a temperature at which the fibers shrink, and at least one of the first fiber layer and the second fiber layer contains at least 30% by weight of the heat-fusible fiber in the nonwoven fabric. Preferably, both fiber layers are partially heat-sealed by the heat-sealing fiber.
【００１０】また前記不織布の発明においては、第一繊
維層の収縮した繊維層を構成する繊維が、融解ピーク温
度（Ｔｍ℃）が１３０＜Ｔｍ＜１４５のエチレン−プロ
ピレンランダムコポリマーを７０重量％以上含むポリマ
ーからなる繊維であることが好ましい。Further, in the invention of the nonwoven fabric, the fibers constituting the contracted fiber layer of the first fiber layer are preferably composed of at least 70% by weight of an ethylene-propylene random copolymer having a melting peak temperature (Tm ° C.) of 130 <Tm <145. It is preferable that the fiber is made of a polymer containing the polymer.
【００１１】前記不織布の発明においては、第二繊維層
の非収縮性短繊維が、エチレン−プロピレンランダムコ
ポリマーを鞘成分に配置し、芯成分にポリオレフィン成
分を配置した芯鞘型複合短繊維であることが好ましい。In the invention of the nonwoven fabric, the non-shrinkable short fibers of the second fiber layer are core-sheath type composite short fibers in which an ethylene-propylene random copolymer is arranged in a sheath component and a polyolefin component is arranged in a core component. Is preferred.
【００１２】前記不織布の発明においては、第二繊維層
の非収縮性短繊維が、繊度１．５〜１０デニール、かつ
繊維長３８〜７６ｍｍの範囲のステープルファイバー
（短繊維）であることが好ましい。In the invention of the nonwoven fabric, the non-shrinkable short fibers of the second fiber layer are preferably staple fibers (short fibers) having a fineness of 1.5 to 10 denier and a fiber length of 38 to 76 mm. .
【００１３】次に本発明の面ファスナー雌材は、前記構
成の表面に凹凸を有する不織布であって、非収縮性短繊
維が表層部分に突出して形成された規則的な凸部が、面
ファスナー雄材のフック部との係合部であることを特徴
とする。Next, the female fastener material of the present invention is a non-woven fabric having the above-mentioned structure having irregularities on its surface, and is a non-shrinkable short fiber.
The regular protrusion formed by protruding the fiber into the surface layer portion is an engaging portion with the hook portion of the male surface fastener.
【００１４】次に本発明の表面に凹凸を有する不織布の
製造方法は、第一繊維層として最大熱収縮率が少なくと
も５０％である熱収縮性繊維を５０重量％以上含んでお
り、第二繊維層として前記熱収縮性繊維が収縮する温度
では実質的に熱収縮しない非収縮性短繊維からなり、か
つ前記第一繊維層または前記第二繊維層の少なくとも一
方の繊維層に熱融着性繊維を不織布中３０重量％以上含
む繊維層を用意し、第一繊維層の片面または両面に第二
繊維層を積層し、加熱エンボスロールを用いて上記熱収
縮性繊維の融点近傍の温度で加熱加圧処理を施すことに
より、両繊維層を部分的に熱融着させると同時に、前記
熱収縮性繊維を熱収縮させて、第二繊維層を各熱融着部
の間の表層部分に突出させて規則的な凸部を形成させる
ことを特徴とする。Next, the method for producing a nonwoven fabric having irregularities on its surface according to the present invention comprises the first fiber layer containing at least 50% by weight of heat-shrinkable fibers having a maximum heat shrinkage of at least 50%, substantially of non-shrinkable short fibers not thermally shrink at temperatures the heat shrinkable fiber as a layer shrinks, and heat-fusible fibers on at least one fiber layer of the first fibrous layer or the second fiber layer Is prepared, a second fiber layer is laminated on one or both sides of the first fiber layer, and heated at a temperature near the melting point of the heat-shrinkable fiber using a heating embossing roll. by applying pressure process, at the same time both fibrous layer is partially thermally fused, the heat shrinkable fiber by heat shrinking projecting a second fiber layer on the surface layer portion between each heat fused portion characterized in that to form regular projecting portions Te
【００１５】前記方法においては、第二繊維層が、繊度
１．５〜１０デニール、繊維長３８〜７６ｍｍのステー
プルファイバーで構成された目付１０〜４０ｇ／ｍ2 の
短繊維ウエブであることが好ましい。In the above method, it is preferable that the second fiber layer is a short fiber web having a basis weight of 10 to 40 g / m 2 and made of staple fibers having a fineness of 1.5 to 10 denier and a fiber length of 38 to 76 mm. .
【００１６】また前記方法においては、第一繊維層が、
繊維長３８〜７６ｍｍ、かつ目付１０〜４０ｇ／ｍ2 の
範囲のパラレルウエブであることが好ましい。また前記
方法においては、エンボスロールとして、頂面の面積が
０．３５〜１ｍｍ2 の小突起を１ｃｍ2 あたり１０〜１
００個配設されたロールを用い、熱融着部の不織布表面
に占める面積割合が１０〜５０％である不織布を形成す
ることが好ましい。以下、本発明の内容を説明する。[0016] In the above method, the first fiber layer may include:
The parallel web preferably has a fiber length of 38 to 76 mm and a basis weight of 10 to 40 g / m 2 . In the method, as the embossing roll, per 1 cm 2 of the small projection area of the top surface 0.35~1mm 2 10~1
00 pieces distribution using the set roles, the area percentage of the non-woven fabric surface of the heat-sealed portion is preferred to form the nonwoven fabric is 10-50% arbitrariness. Hereinafter, the contents of the present invention will be described.
【００１７】本発明は、熱収縮性繊維を含む第一繊維層
に、その熱収縮性繊維が熱収縮する温度では実質的に収
縮しない非収縮性短繊維（以下単に「非収縮性繊維」と
もいう。）からなる第二繊維層が積層し、両者の熱収縮
率の差を利用して第二繊維層に面ファスナー雄材のフッ
ク部との係合に適した嵩高で突出した規則的な凸部（以
下単に「凸部」ともいう。）を形成させることを特徴と
する。従って、第一繊維層は十分に熱収縮する必要があ
り、第一繊維層に含まれる熱収縮性繊維はその最大熱収
縮率が少なくとも５０％であることが望ましく、その混
合割合は５０重量％以上であることが望ましい。ここで
最大熱収縮率とは、加熱された繊維が繊維の形状を保っ
たままで示す熱収縮率のうちで最大のものをいう。最大
熱収縮率が５０％未満の熱収縮性繊維を使用した場合、
あるいは熱収縮性繊維の割合が５０重量％未満である場
合は、第一繊維層の熱収縮が不十分で第二繊維層に形成
される凸部が嵩高性に乏しいものとなり、雄材と係合し
にくくなる。According to the present invention, non-shrinkable staple fibers (hereinafter simply referred to as "non-shrinkable fibers") are provided on a first fiber layer containing heat-shrinkable fibers at a temperature at which the heat-shrinkable fibers thermally shrink.
Also say. ) Are laminated, and a bulky and protruding regular protrusion ( suitable for engagement with the hook portion of the male hook-and-loop fastener) is formed on the second fiber layer by utilizing the difference in thermal shrinkage between the two. Less than
It is also simply referred to as “convex” below. ) Is formed. Therefore, the first fiber layer must be sufficiently heat-shrinkable, and the heat-shrinkable fiber contained in the first fiber layer desirably has a maximum heat shrinkage of at least 50% and a mixing ratio of 50% by weight. It is desirable that this is the case. Here, the maximum heat shrinkage refers to the largest heat shrinkage of the heated fiber while maintaining the shape of the fiber. When a heat shrinkable fiber having a maximum heat shrinkage of less than 50% is used,
Alternatively, when the proportion of the heat-shrinkable fiber is less than 50% by weight, the heat shrinkage of the first fiber layer is insufficient, and the projections formed on the second fiber layer are poor in bulkiness, and are engaged with the male material. It becomes difficult to do.
【００１８】熱収縮性繊維が５０重量％以上含まれてい
れば、第一繊維層にその他の繊維を混合することができ
る。混合する繊維は特に限定されず、レーヨン等の再生
繊維、アセテート等の半合成繊維、ナイロン６、ナイロ
ン６６等のポリアミド系繊維、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等のポリエステル系
繊維、ポリエチレン、ポリプロピレン等のポリオレフィ
ン系繊維等から任意に一あるいは二以上選択して使用す
ることができる。勿論、第一繊維層は熱収縮性繊維のみ
から構成されてもよい。If the heat-shrinkable fibers are contained in an amount of 50% by weight or more, other fibers can be mixed in the first fiber layer. The fibers to be mixed are not particularly limited, and recycled fibers such as rayon, semi-synthetic fibers such as acetate, polyamide fibers such as nylon 6, nylon 66, polyester fibers such as polyethylene terephthalate and polybutylene terephthalate, polyethylene, polypropylene and the like. One or more selected from polyolefin fibers can be used. Of course, the first fiber layer may be composed of only heat-shrinkable fibers.
【００１９】本発明では、最大熱収縮率が少なくとも５
０％である熱収縮性繊維として、融解ピーク温度（Ｔｍ
℃）が、１３０＜Ｔｍ＜１４５℃の範囲内にあるエチレ
ン−プロピレンランダムコポリマーを７０重量％以上含
むポリマーからなる繊維を使用することが望ましい。こ
こで融解ピーク温度とは、示差走査熱量計（ＤＳＣ）に
よりポリマーの融解熱測定を行ったときにＤＳＣ曲線が
最高値を示すときの温度をいう。ここで融解ピーク温度
が１３０℃未満であるとポリマーがゴム的弾性を示すよ
うになり、繊維のカード通過性が悪くなる。逆に、１４
５℃を超えると、繊維の熱収縮性が通常のポリプロピレ
ン程度となってしまうために好ましくない。In the present invention, the maximum heat shrinkage is at least 5
As a heat-shrinkable fiber of 0%, the melting peak temperature (Tm
C) is preferably in the range of 130 <Tm <145 ° C. It is desirable to use fibers made of a polymer containing 70% by weight or more of an ethylene-propylene random copolymer. Here, the melting peak temperature means a DSC curve obtained by measuring the heat of fusion of a polymer by a differential scanning calorimeter (DSC).
The temperature at which the maximum value is shown. Here, if the melting peak temperature is lower than 130 ° C., the polymer exhibits rubber-like elasticity, and the fiber has a poor card passing property. Conversely, 14
If the temperature exceeds 5 ° C., the heat shrinkability of the fiber becomes about the same as ordinary polypropylene, which is not preferable.
【００２０】第一繊維層の態様は、ステープルファイバ
ーからなるパラレルウエブ、クロスウエブ、セミランダ
ムウエブ、ランダムウエブなど何れであっても良いが、
繊維ウエブの熱収縮の方向を一方向に集中させるほう
が、第二繊維層に凸部が均一に形成される。従って第一
繊維層はパラレルウエブであることが好ましい。この場
合、カード通過性やウエブの地合い等を考慮すると、ス
テープルファイバーの繊維長は３８〜７６ｍｍであるこ
とが望ましい。また、本発明では第一繊維層の目付を１
０〜４０ｇ／ｍ2 とすることが特に好ましく、１０ｇ／
ｍ2 未満ではウエブにむらができ、均一に熱収縮しない
ため凸部が不均一となる。逆に、目付が４０ｇ／ｍ2 よ
りも大きいと、熱収縮後の繊維ウエブの厚みが大きくな
ってファスナー全体が嵩高くなり、柔軟性や通気性に劣
るものとなる。The mode of the first fiber layer may be any of a parallel web made of staple fibers, a cross web, a semi-random web, a random web, and the like.
When the direction of the thermal contraction of the fiber web is concentrated in one direction, the convex portion is formed uniformly in the second fiber layer. Therefore, the first fiber layer is preferably a parallel web. In this case, the fiber length of the staple fiber is desirably 38 to 76 mm in consideration of card passing properties, web formation, and the like. In the present invention, the basis weight of the first fiber layer is 1
It is particularly preferred to be 0 to 40 g / m 2, and 10 g / m 2
If it is less than m 2 , the web may be uneven and may not be uniformly heat shrunk, so that the projections may be uneven. Conversely, if the basis weight is greater than 40 g / m 2 , the thickness of the fibrous web after heat shrinkage becomes large, and the entire fastener becomes bulky, resulting in poor flexibility and air permeability.
【００２１】第二繊維層は、第一繊維層の熱収縮によ
り、その表面に多数の凸部が形成されるものである。従
って、第二繊維層を構成する繊維は、繊維集合物を形成
することができ、熱収縮性繊維が収縮する温度において
実質的に収縮しないものであれば素材等は特に限定され
ない。例えば、レーヨン等の再生繊維、アセテート等の
半合成繊維、綿、ウール等の天然繊維、ポリプロピレ
ン、ポリエチレン、ポリブテンなどのポリオレフィン系
繊維、ポリエチレンテレフタレート、ポリブチレンテレ
フタレート等のポリエステル系繊維、ナイロン６、ナイ
ロン６６等のポリアミド系繊維の中から任意に一あるい
は二以上選択して使用することができる。繊維形状等も
限定されず、分割性複合繊維や異形断面を有する繊維等
を任意に用いることができる。The second fiber layer has a large number of projections formed on the surface thereof due to the heat shrinkage of the first fiber layer. Therefore, the material constituting the second fiber layer is not particularly limited as long as it can form a fiber aggregate and does not substantially shrink at the temperature at which the heat-shrinkable fiber shrinks. For example, recycled fibers such as rayon, semi-synthetic fibers such as acetate, natural fibers such as cotton and wool, polyolefin fibers such as polypropylene, polyethylene and polybutene, polyester fibers such as polyethylene terephthalate and polybutylene terephthalate, nylon 6, nylon One or two or more selected from polyamide fibers such as 66 can be used. The fiber shape and the like are not limited, and a splittable conjugate fiber or a fiber having an irregular cross section can be arbitrarily used.
【００２２】特に、本発明では、第一繊維層と第二繊維
層を部分的に熱融着させるので、非収縮性繊維は第一繊
維層との接合性が良好な繊維であることが望ましい。例
えば、熱収縮性繊維として前述したエチレン−プロピレ
ンランダムコポリマーからなる繊維を使用する場合、エ
チレン−プロピレンランダムコポリマーが繊維表面を占
めるような芯鞘型複合繊維は分割型複合繊維を使用する
とよい。In particular, in the present invention, since the first fiber layer and the second fiber layer are partially heat-sealed, it is desirable that the non-shrinkable fiber is a fiber having good bondability with the first fiber layer. . For example, when a fiber made of the above-described ethylene-propylene random copolymer is used as the heat-shrinkable fiber, a split-type composite fiber may be used as the core-sheath type composite fiber in which the ethylene-propylene random copolymer occupies the fiber surface.
【００２３】第二繊維層の態様は特に限定されないが、
面ファスナー雄材のフック部との係合性を考慮すると、
ステープルファイバーからなるパラレルウエブ、クロス
ウエブ、セミランダムウエブ、ランダムウエブ等のいわ
ゆる短繊維ウエブが好ましい。この場合、繊維長は３８
〜７６ｍｍであることが望ましく、３８ｍｍ未満であれ
ば凸部において毛羽立ちが生じ易く、更には繰り返し係
合・剥離する場合にファスナーの係合力が低下するとい
う問題が生じる。また、繊維長が７６ｍｍを超えるとカ
ード通過性が悪くなり、地合いの整ったウエブを得られ
なくなる。また、繊維の繊度は１．５〜１０デニールで
あることが望ましい。繊度が１．５デニール未満であれ
ば、雄材のフック部との係合、剥離により切れ易く、毛
羽立ちの原因となり更には係合力低下の原因となる。逆
に、繊度が１０デニールを超えると、ファスナー全体の
柔軟性が損なわれ、同目付のウエブでは、繊度が大きく
なるにつれて、単位体積当たりの構成繊維本数が減少す
るため、雄材のフック部と係合する繊維数が減少し、係
合力が低下する。Although the embodiment of the second fiber layer is not particularly limited,
Considering the engagement with the hook part of the surface fastener male material,
So-called short fiber webs such as parallel webs, cross webs, semi-random webs and random webs made of staple fibers are preferred. In this case, the fiber length is 38
It is desirable that the thickness be smaller than 76 mm, and if it is less than 38 mm, fluffing is likely to occur at the convex portion, and furthermore, there is a problem that the engaging force of the fastener is reduced in the case of repeated engagement and separation. On the other hand, if the fiber length exceeds 76 mm, the card passing property deteriorates, and a well-formed web cannot be obtained. The fineness of the fiber is desirably 1.5 to 10 denier. If the fineness is less than 1.5 denier, the male material is likely to be broken by engagement with the hook portion and peeling, causing fluffing and further lowering the engagement force. Conversely, if the fineness exceeds 10 denier, the flexibility of the entire fastener is impaired, and as the fineness increases, the number of constituent fibers per unit volume decreases as the fineness increases. The number of fibers to be combined decreases, and the engaging force decreases.
【００２４】本発明の不織布は第一繊維層と第二繊維層
を部分的に熱融着させて一体化させる必要があるため、
両繊維層の少なくとも一方に、熱融着性繊維が不織布を
構成する繊維全体中に３０重量％以上含まれていること
が望ましい。熱融着性繊維が第一繊維層および第二繊維
層の両方に含まれていると、両繊維層の間がより強固に
接合されるので、より好ましい。本発明では、熱収縮性
繊維の収縮開始温度よりも低い温度で軟化あるいは溶融
して熱融着するものを使用するとよい。また、この熱融
着性繊維は前述した熱収縮性繊維で兼用することもでき
る。例えば、先に例示したエチレン−プロピレンランダ
ムコポリマーからなる繊維は、１１５〜１４５℃で加熱
加圧処理を施すことにより、熱収縮すると同時に軟化あ
るいは溶融して熱融着性をも示すので、熱融着性繊維と
しても使用することができる。In the nonwoven fabric of the present invention, since the first fiber layer and the second fiber layer need to be partially heat-sealed and integrated,
It is desirable that at least one of the two fiber layers contains the heat-fusible fiber in an amount of 30% by weight or more in the entire fiber constituting the nonwoven fabric. It is more preferable that the heat-fusible fiber be contained in both the first fiber layer and the second fiber layer, because the two fiber layers are more firmly joined. In the present invention, a heat-shrinkable fiber that is softened or melted at a temperature lower than the shrinkage starting temperature and heat-fused may be used. Further, the heat-fusible fiber can be also used as the heat-shrinkable fiber described above. For example, the fiber comprising the ethylene-propylene random copolymer exemplified above is subjected to a heat and pressure treatment at 115 to 145 ° C., so that it simultaneously shrinks or softens or melts at the same time and exhibits a heat-fusing property. It can also be used as an adhesive fiber.
【００２５】上記第一繊維層と第二繊維層は積層され、
部分的に熱融着されて一体化する。部分的に熱融着する
方法としては、エンボスロールとその下方部に配設され
たフラットロールとの間を通過させながら加熱・加圧す
る方法が好ましい。エンボスロールとしては、頂面が円
形あるいは多角形の小突起がロール表面に多数配設され
たもののほかに、ロールの幅方向に規則的な凹凸が形成
された歯車の形状を有するもの、あるいはロールの縦方
向に規則的な凹凸が形成されているようなスリットタイ
プのものなども使用することが出来る。また、熱融着部
が規則的に設けられると、各熱融着部の間に形成される
凸部も規則的なものとなるので整然とした外観を呈する
美麗な不織布を得ることができる。The first fiber layer and the second fiber layer are laminated,
Partially heat-sealed and integrated. As a method of partially heat-sealing, a method of heating and pressing while passing between an embossing roll and a flat roll disposed below the embossing roll is preferable. As the embossing roll, in addition to a roll having a large number of small protrusions having a circular or polygonal top surface arranged on the roll surface, a roll having a gear shape in which regular irregularities are formed in a roll width direction, or a roll. A slit type in which regular irregularities are formed in the vertical direction can be used. Further, when the heat-sealed portions are regularly provided, the convex portions formed between the heat-sealed portions are also regular, so that a beautiful nonwoven fabric having an orderly appearance can be obtained.
【００２６】本発明の不織布を面ファスナー雌材として
使用する場合、熱融着部が不織布表面に占める割合は１
０〜５０％であることが好ましく、より好ましくは１５
〜３０％である。具体的には、頂面の面積が０．３５〜
１ｍｍ2 の小突起が１ｃｍ2あたり１０〜１００個配設
されたエンボスロール、より好ましくは０．４〜０．８
ｍｍ2 の頂面を有する小突起が１ｃｍ2 あたり２０〜７
０個配設されたものを用いるとよい。When the nonwoven fabric of the present invention is used as a female material of a hook-and-loop fastener, the ratio of the heat-sealed portion to the nonwoven fabric surface is 1%.
It is preferably 0 to 50%, more preferably 15 to 50%.
３０30%. Specifically, the area of the top surface is 0.35
An embossing roll in which 10 to 100 small protrusions of 1 mm 2 are arranged per 1 cm 2 , more preferably 0.4 to 0.8
Small protrusions having a top surface of mm 2 are 20 to 7 per cm 2
It is good to use the one provided.
【００２７】そして両繊維層を部分的に熱融着せしめた
後、第一繊維層を熱収縮させることにより、第二繊維層
の各熱融着部の間で凸部が形成される。本発明の不織布
の製造方法は、特定の熱収縮性繊維もしくは熱融着性繊
維を採用することで、両繊維層の熱融着と第一繊維層の
熱収縮をほぼ同時に進行させることを特徴とする。例え
ば、熱収縮性繊維として先に例示したエチレン−プロピ
レンランダムコポリマーからなる繊維は、非常に収縮性
に富み、ロール間を通過する僅かな時間の加熱によって
も収縮するので、これを用いれば一段階の熱処理で熱融
着と熱収縮が行うことができる。即ち、この繊維は、熱
ロール間で加熱加圧処理を施すと、まず熱融着性繊維と
して作用し、その後、熱ロールから得た余熱を利用する
ような形で収縮するのである。また、それ自身熱融着性
を示さない熱収縮性繊維であっても熱収縮率の高いもの
であれば、適宜、熱融着性繊維を併用することにより同
様の処理が可能である。After the two fiber layers are partially heat-sealed, the first fiber layer is thermally shrunk to form a projection between the heat-sealed portions of the second fiber layer. The method for producing a nonwoven fabric of the present invention is characterized in that heat fusion of both fiber layers and heat shrinkage of the first fiber layer proceed almost simultaneously by adopting a specific heat-shrinkable fiber or heat-fusible fiber. And For example, the fiber made of the ethylene-propylene random copolymer exemplified above as the heat-shrinkable fiber is very rich in shrinkage, and shrinks by heating for a short time passing between rolls. By the heat treatment, heat fusion and heat shrinkage can be performed. That is, when the fibers are subjected to the heat and pressure treatment between the heat rolls, the fibers first act as heat fusible fibers, and then contract in such a manner as to utilize the residual heat obtained from the heat rolls. Even if the heat-shrinkable fiber itself does not exhibit heat-fusibility, the same treatment can be performed by appropriately using the heat-shrinkable fiber as long as the heat-shrinkage rate is high.
【００２８】熱処理温度および圧力は、熱収縮性繊維や
熱融着性繊維に応じて決定する必要がある。例えば、熱
収縮性繊維としてエチレン−プロピレンランダムコポリ
マーからなる繊維を使用する場合、ロールの温度（Ｔ
℃）は１１０＜Ｔ＜Ｔｍ＋３０の範囲内で設定する必要
があり、好ましくは１１５＜Ｔ＜１４５、より好ましく
は１２０＜Ｔ＜１３０にするとよい。１１０℃以下では
両繊維層が十分に接着しないために剥離したり、圧着不
良のためにファスナーの毛羽立ちが生じやすくなる。逆
に１４５℃を超えると第二繊維層中の繊維が熱可塑性繊
維で構成されている場合に繊維が溶融・軟化して繊維形
状が維持されなくなり、雄材との係合不良の原因とな
る。また、ロール間の圧力は２５ｋｇ／ｃｍ以上８５ｋ
ｇ／ｃｍ以下が好ましい。２５ｋｇ／ｃｍ未満であると
圧着不良となって層間剥離が生じやすくなり、８５ｋｇ
／ｃｍを超えると熱融着部に穴があくといった不都合が
生じる。The heat treatment temperature and pressure need to be determined according to the heat shrinkable fiber and the heat fusible fiber. For example, when a fiber made of an ethylene-propylene random copolymer is used as the heat-shrinkable fiber, the temperature of the roll (T
C) must be set within the range of 110 <T <Tm + 30, and preferably 115 <T <145, more preferably 120 <T <130. If the temperature is lower than 110 ° C., the two fiber layers are not sufficiently adhered to each other, so that the fiber layers are peeled off, or the fastener is apt to be fluffed due to poor pressure bonding. On the other hand, when the temperature exceeds 145 ° C., when the fibers in the second fiber layer are made of thermoplastic fibers, the fibers are melted and softened and the fiber shape is not maintained, which causes poor engagement with the male material. The pressure between the rolls is 25 kg / cm or more and 85 k
g / cm or less is preferable. If it is less than 25 kg / cm, the pressure bonding becomes poor and delamination tends to occur, and
If it exceeds / cm, there is a disadvantage that a hole is formed in the heat-sealed portion.
【００２９】本発明の不織布は、熱収縮性繊維の収縮開
始温度よりも低い温度で熱融着処理を施した後、別途熱
処理を施して第一繊維層を収縮させることによっても製
造しうるが、二段階で熱処理を施すよりも一段階で熱処
理を施す方が、工程が短くなりエネルギー的にも有利で
あるため、低コストで製造が可能となる。The nonwoven fabric of the present invention can also be produced by subjecting the first fiber layer to shrinkage by applying a heat treatment at a temperature lower than the shrinkage initiation temperature of the heat shrinkable fiber and then performing a separate heat treatment. If the heat treatment is performed in one step rather than the heat treatment in two steps, the process becomes shorter and the energy is more advantageous, so that the production can be performed at low cost.
【００３０】このようにして得られる本発明の不織布
は、第一繊維層の熱収縮により第二繊維層に凸部が形成
されたものである。そしてこの凸部においては繊維同士
があまり接合しておらず、比較的自由度が高くなってい
るから、面ファスナー雄材のフック部と係合しやすい状
態となっている。そしてこの凸部は、鉤型、キノコ型、
いずれの形状の雄材とも係合可能である。また、両繊維
層が凸部と凸部の間が熱融着部となっており、凸部を形
成する繊維の一部は熱融着部で固定されているので、凸
部の安定性は極めて高く、雄材と繰り返し係合された場
合でも毛羽立ちが少ない。従って、本発明の不織布は面
ファスナー雌材として非常に有用なものである。The thus obtained nonwoven fabric of the present invention is obtained by forming a convex portion on the second fiber layer by heat shrinkage of the first fiber layer. Since the fibers are not so bonded to each other at this convex portion and the degree of freedom is relatively high, the convex portion is easily engaged with the hook portion of the male member of the hook-and-loop fastener. And this convex part is hook type, mushroom type,
Any shape of male material can be engaged. In addition, since both fiber layers have a heat-sealed portion between the convex portions and a part of the fiber forming the convex portion is fixed by the heat-sealed portion, the stability of the convex portion is high. Extremely high, with little fuzz even when repeatedly engaged with the male material. Therefore, the nonwoven fabric of the present invention is very useful as a female fastener material.
【００３１】[0031]
【作用】前記した本発明の不織布によれば、収縮した繊
維層と非収縮性繊維からなる少なくとも２種類の繊維か
ら構成される不織布であって、部分的に熱融着部により
厚さ方向に一体化され、かつ各熱融着部の間の非熱融着
部では前記非収縮性繊維が表層部分に突出して凸部を形
成していることにより、柔軟で係合力が高くかつコスト
の安い面ファスナー雌材に適した表面に凹凸を有する不
織布を実現できる。According to the nonwoven fabric of the present invention described above, the nonwoven fabric is composed of at least two kinds of fibers consisting of a contracted fiber layer and a non-shrinkable fiber, and is partially heat-sealed in the thickness direction. In the non-heat-sealed portion between the heat-sealed portions, the non-shrinkable fibers protrude from the surface layer portion to form a convex portion, so that they are flexible, have high engaging force, and are inexpensive. A nonwoven fabric having unevenness on the surface suitable for a female surface fastener can be realized.
【００３２】次に本発明の面ファスナー雌材によれば、
前記の表面に凹凸を有する不織布を用いて、非収縮性繊
維が表層部分に突出して形成された凸部を、面ファスナ
ー雄材のフック部との係合部として使用することによ
り、柔軟で係合力が高くかつコストの安い面ファスナー
雌材を実現できる。Next, according to the female fastener material of the present invention,
Using a non-woven fabric having irregularities on the surface, a convex portion formed by projecting non-shrinkable fibers to a surface layer portion is used as an engaging portion with a hook portion of a male surface fastener, so that a soft engaging force is obtained. A high-cost and low-cost hook-and-loop fastener female material can be realized.
【００３３】次に本発明の方法によれば、前記不織布及
び面ファスナー雌材を効率良く合理的に製造できる。本
発明において、熱収縮性繊維を含む第一繊維層は、加熱
処理によって熱収縮し、第二繊維層に凸部を形成させる
はたらきをする。また、第二繊維層は第一繊維層の収縮
により嵩高な凸部を形成し、この凸部は面ファスナー雄
材のフック部との係合部となる。そして両繊維層は部分
的に熱融着されて一体化し、この熱融着部は不織布全体
の強力を担保し、また凸部の安定性を向上せしめる。さ
らに前記凸部は熱融着部と熱融着部の間に形成され、熱
融着部の面積、間隔等を適宜調節することにより、所望
のパターンを有する凸部を形成することが可能となるの
で、熱融着部は本発明の不織布の表面状態を決定する要
因の一つとしても作用する。Next, according to the method of the present invention, the nonwoven fabric and the hook-and-loop fastener female material can be efficiently and rationally manufactured. In the present invention, the first fiber layer containing the heat-shrinkable fibers heat-shrinks due to the heat treatment, and serves to form a convex portion on the second fiber layer. Further, the second fiber layer forms a bulky convex portion due to the contraction of the first fiber layer, and the convex portion becomes an engaging portion with the hook portion of the male surface fastener. The two fiber layers are partially heat-sealed and integrated, and the heat-sealed portion secures the strength of the entire nonwoven fabric and improves the stability of the projections. Further, the convex portion is formed between the heat-sealed portion and the heat-sealed portion, and by appropriately adjusting the area, interval, and the like of the heat-sealed portion, it is possible to form a convex portion having a desired pattern. Therefore, the heat-sealed portion also acts as one of the factors that determine the surface state of the nonwoven fabric of the present invention.
【００３４】[0034]
【実施例】以下本発明を実施例を挙げて具体的に説明す
る。本発明者等は、最大熱収縮率が少なくとも５０％で
ある熱収縮性繊維を５０重量％以上含んでなる第一繊維
層の片面もしくは両面に、前記熱収縮性繊維が収縮する
温度では実質的に熱収縮しない非収縮性繊維からなる第
二繊維層を積層し、これにエンボスロールを用いて上記
熱収縮性繊維の融点近傍の温度で加熱加圧処理を施すこ
とにより、両繊維層を部分的に熱融着させると同時に、
前記熱収縮性繊維を熱収縮させて第二繊維層の各熱融着
部の間に凸部を形成させて表面に凹凸を有する不織布を
作成したところ、これが面ファスナー雌材に好適である
ことを見い出し、本発明に至ったものである。The present invention will be specifically described below with reference to examples. The present inventors have found that the heat-shrinkable fiber has a maximum heat shrinkage of at least 50% on one or both sides of the first fiber layer containing 50% by weight or more of the heat-shrinkable fiber at a temperature at which the heat-shrinkable fiber shrinks. By laminating a second fiber layer made of non-shrinkable fibers that does not thermally shrink, and applying heat and pressure treatment at a temperature near the melting point of the heat shrinkable fibers using an embossing roll, the two fiber layers are partially Heat fusion at the same time
When heat-shrinking the heat-shrinkable fibers to form a convex portion between the respective heat-sealed portions of the second fiber layer to produce a nonwoven fabric having irregularities on the surface, this is suitable for a hook-and-loop fastener female material. Have been found, and have led to the present invention.
【００３５】なお、以下の実施例中、得られた不織布の
厚み、引張強力、面ファスナー雌材として用いた場合の
係合力及び剛軟性（柔軟性）の評価は次のように行っ
た。 （１）厚み：得られた不織布に３ｇ／ｃｍ2 の荷重を加
えた状態で測定した。 （２）引張強力：ＪＩＳ Ｌ １０９６に準じて測定
し、５×１５ｃｍの試料を３０ｃｍ／分で伸長し、切断
時の荷重値を強力とした。 （３）係合力：各試料を幅４０ｍｍに切断し、これを先
端形状がキノコ型のフック部が１ｍｍ2 あたり９個設け
られた厚み約０．４ｍｍ、幅４０ｍｍの面ファスナー雄
材と２５ｍｍの長さで係合させ、２．０ｋｇのローラで
加重係合した。次いで、これを引張強力試験測定装置
（オリエンテック（株）製テンシロン装置）を用いて、
係合していない部分の雄材と雌材の上下をつかみ間隔１
０ｃｍでつかみ、速度１０ｃｍ／分で引張強力試験を行
い、最大強力を読み取ってこれを係合力とした。また試
験は初回のものと着脱を５回繰り返したものについて行
った。 （４）剛軟性（柔軟性）：カンチレバー法（ＪＩＳ Ｌ
１０８５ Ａ法）に基づいて曲げ長さを測定し、剛軟
性（柔軟性）を評価した。In the following examples, the thickness, tensile strength, engaging force and rigidity (flexibility) of the obtained nonwoven fabric when used as a female surface fastener were evaluated as follows. (1) Thickness: Measured with a load of 3 g / cm 2 applied to the obtained nonwoven fabric. (2) Tensile strength: Measured according to JIS L 1096, a 5 × 15 cm sample was elongated at 30 cm / min, and the load value at the time of cutting was defined as strong. (3) Engaging force: Each sample was cut to a width of 40 mm, and this was cut into a male hook-and-loop fastener having a thickness of about 0.4 mm and a width of 40 mm provided with nine mushroom-shaped hooks per 1 mm 2 and a length of 25 mm. Then, they were engaged by weight with a 2.0 kg roller. Then, using a tensile strength test measuring device (Orientec Co., Ltd. Tensilon device),
Hold the top and bottom of the unengaged male and female members at the top and bottom and have a gap of 1
It was grasped at 0 cm and a tensile strength test was performed at a speed of 10 cm / min. In addition, the test was performed for the first test and the test for which attachment and detachment were repeated five times. (4) Bending flexibility (flexibility): Cantilever method (JIS L
The bending length was measured based on 1085 A method), and the stiffness (flexibility) was evaluated.
【００３６】（実施例１〜６）熱収縮性繊維として、融
解ピーク温度が１３６℃のエチレン−プロピレンランダ
ムコポリマーを２６０℃で溶融紡糸し、３．５倍に延伸
したもの（表中、ＰＮＥと略す）を使用した。前記ＰＮ
Ｅ繊維の最大熱収縮率は１５０℃で９２％であった。こ
れを繊度２デニール、繊維長５１ｍｍのステープルファ
イバー（短繊維）とし、パラレルカードで目付１０ｇ／
ｍ2 のパラレルウエブを作成し、この繊維ウエブを第一
繊維層とした。なお、最大熱収縮率の測定方法は、繊維
を５０本束ねて、黒い綿糸で所定間隔に印をつけ、温度
１５０℃の雰囲気下に３０秒程度曝した後、印をつけた
間隔を測定し熱収縮率を算出する。融解ピーク温度（融
点）より高い温度で測定しているが、処理時間が短いの
で繊維形状を保ったまま収縮させることができる。(Examples 1 to 6) As heat-shrinkable fiber, an ethylene-propylene random copolymer having a melting peak temperature of 136 ° C. was melt-spun at 260 ° C. and stretched 3.5 times (PNE and PNE in the table). (Abbreviated). The PN
The maximum heat shrinkage of the E fiber was 92% at 150 ° C. This is a staple fiber (short fiber) having a fineness of 2 denier and a fiber length of 51 mm.
create a parallel web m 2, the fiber web was first fibrous layer. The maximum heat shrinkage was measured by bundling 50 fibers, marking them at predetermined intervals with black cotton yarn, exposing them to an atmosphere at a temperature of 150 ° C. for about 30 seconds, and measuring the intervals marked. Calculate the heat shrinkage. Although the measurement is performed at a temperature higher than the melting peak temperature (melting point), since the treatment time is short, the fiber can be contracted while maintaining the fiber shape.
【００３７】次に、非収縮性繊維として、鞘成分がエチ
レン−プロピレンランダムコポリマー、芯成分がポリプ
ロピレンの芯鞘型複合繊維を、芯鞘の成分比が６３／３
７となるように鞘成分を２５０℃、芯成分を２８０℃で
溶融複合紡糸し、２．４倍に延伸したもの（表中、ＮＢ
Ｆ−Ｐと略す）を使用した。これを繊度２デニール、繊
維長５１ｍｍのステープルファイバー（短繊維）とし、
パラレルカードで目付２０ｇ／ｍ2 のパラレルウエブを
作成し、この繊維ウエブを第二繊維層とした。Next, as the non-shrinkable fiber, a core-sheath type composite fiber having an ethylene-propylene random copolymer as a sheath component and a polypropylene as a core component was used.
7 was obtained by melt-spinning the sheath component at 250 ° C. and the core component at 280 ° C. and stretched 2.4 times (NB in the table).
FP). This is a staple fiber (short fiber) with a fineness of 2 denier and a fiber length of 51 mm.
A parallel web having a basis weight of 20 g / m 2 was prepared using a parallel card, and this fiber web was used as a second fiber layer.
【００３８】続いて、第一繊維層の上に第二繊維層を積
層し、この積層物を、頂面の面積が０．７８５ｍｍ2 の
円錐台型の小突起が１ｃｍ2 あたり２５個、規則的に配
設されたエンボスロールと、その下方に配置されたフラ
ットロールの両ロール間に、第一繊維層がエンボスロー
ルと当接するように導入し、表中にそれぞれ示す温度お
よび圧力で両繊維層を熱圧着すると同時に第一繊維層を
熱収縮させた。Subsequently, a second fiber layer was laminated on the first fiber layer, and this laminate was subjected to regular frusto-conical small projections having a top surface area of 0.785 mm 2 , 25 per cm 2 , in a regular manner. The first fiber layer is introduced between the two embossing rolls and the flat rolls disposed below the embossing rolls so as to contact the embossing rolls. The first fiber layer was thermally contracted at the same time as the layers were thermocompressed.
【００３９】得られた実施例１の不織布の表面は規則的
な凹凸を有しており、その平面は図１に示すような形状
をしていた。図１において、不織布１の表面には規則的
な凸部５と、規則的な凹部（融着部）４が存在し、前記
凸部５は主に第二繊維層３で形成され、前記凹部（融着
部）４及び前記凸部５の下の部分は主に第一繊維層２が
収縮した状態で形成されていた。図２は図１の裏面を示
すもので、主に第一繊維層２で覆われており、規則的に
凹部（融着部）４が存在していた。次に、図１〜２の模
式的な断面を見ると図３のように熱融着部４が凹部とな
り、第一繊維層２の熱収縮によって第二繊維層３が凸部
５を形成していた。また、この不織布は柔軟で且つ、風
合の良いものであった。それぞれの不織布の厚み、引張
強力、係合力を表１に示す。The surface of the obtained nonwoven fabric of Example 1 had regular irregularities, and the plane was shaped as shown in FIG. In FIG. 1, a regular convex portion 5 and a regular concave portion (fused portion) 4 are present on the surface of the nonwoven fabric 1, and the convex portion 5 is mainly formed by the second fiber layer 3, (Fused portion) 4 and a portion below the convex portion 5 were formed mainly in a state where the first fiber layer 2 was contracted. FIG. 2 shows the back surface of FIG. 1, which was mainly covered with the first fiber layer 2, and had regularly concave portions (fused portions) 4. Next, looking at the schematic cross section of FIGS. 1 and 2, as shown in FIG. 3, the heat-sealed portion 4 becomes a concave portion, and the second fiber layer 3 forms a convex portion 5 by thermal contraction of the first fiber layer 2. I was Further, this nonwoven fabric was soft and had a good feeling. Table 1 shows the thickness, tensile strength and engagement force of each nonwoven fabric.
【００４０】[0040]
【表１】 [Table 1]
【００４１】表中、タテ方向の引張強力及び係合力と
は、繊維ウエブ中の繊維方向を雌材の長さ方向としたと
きの強力のことであり、ヨコ方向とは、繊維ウエブ中の
繊維方向と９０°の角をなす方向を雌材の長さ方向とし
たときの強力のことである。In the table, the tensile strength and the engaging force in the vertical direction are the strengths when the fiber direction in the fiber web is set to the length direction of the female material, and the horizontal direction is the fiber strength in the fiber web. This is the strength when the direction making a 90 ° angle with the direction is the length direction of the female material.
【００４２】（比較例１）実施例１で使用した芯成分／
鞘成分がポリプロピレン／エチレン−プロピレンランダ
ムコポリマーの芯鞘型複合繊維のみを使用して目付を３
０ｇ／ｍ2 のパラレルウエブを作成し、このウエブを実
施例１と同様の方法でエンボスロールとフラットロール
を用いて加熱加圧処理を施し、不織布となした。Comparative Example 1 Core Component Used in Example 1
The basis weight is 3 using only the core / sheath type composite fiber whose sheath component is polypropylene / ethylene-propylene random copolymer.
A parallel web of 0 g / m 2 was prepared, and the web was subjected to heat and pressure treatment using an embossing roll and a flat roll in the same manner as in Example 1 to form a nonwoven fabric.
【００４３】（比較例２）熱収縮性を殆ど示さないポリ
プロピレン繊維（繊度２デニール、繊維長５１ｍｍ）を
用いて、パラレルカードで目付１０ｇ／ｍ2 のパラレル
ウエブを作成し、この繊維ウエブを第一繊維層とした。
また、第二繊維層として実施例１で使用したのと同じ芯
成分／鞘成分がポリプロピレン／エチレン−プロピレン
ランダム共重の芯鞘型複合繊維からなる目付２０ｇ／ｍ
2 のパラレルウエブを用意した。そして、第一繊維層の
上に第二繊維層を積層し、実施例１と同じ方法で加熱加
圧処理を施し、不織布を作成した。比較例１〜２の不織
布の性能を表２に示す。(Comparative Example 2) A parallel web having a basis weight of 10 g / m 2 was prepared using a parallel card by using a polypropylene fiber (fineness: 2 denier, fiber length: 51 mm) showing almost no heat shrinkage. One fiber layer.
Further, the same core component / sheath component as used in Example 1 as the second fiber layer was made of a core / sheath composite fiber having a polypropylene / ethylene-propylene random co-weight, and a basis weight of 20 g / m 2.
Two parallel webs were prepared. Then, a second fiber layer was laminated on the first fiber layer, and subjected to a heating and pressurizing treatment in the same manner as in Example 1 to produce a nonwoven fabric. Table 2 shows the performance of the nonwoven fabrics of Comparative Examples 1 and 2.
【００４４】[0044]
【表２】 [Table 2]
【００４５】次に、実施例１〜６の不織布と、市販の面
ファスナー（クラレ（株）製：商品名、“マジックテー
プベルクロ”）の雌材について、それぞれカンチレバー
法（ＪＩＳ Ｌ １０８５ Ａ法）に基づいて曲げ長さ
を測定し、剛軟性を評価した。得られた結果を表３に示
す。表中、タテ方向の曲げ長さは繊維ウエブ中の繊維方
向を長さ方向として測定したものであり、ヨコ方向の曲
げ長さは繊維ウエブ中の繊維方向と９０°の角をなす方
向を長さ方向として測定したものである。Next, for the nonwoven fabrics of Examples 1 to 6 and the female material of a commercially available hook-and-loop fastener (trade name, "Magic Tape Velcro" manufactured by Kuraray Co., Ltd.), cantilever method (JIS L 1085 A method), respectively. The bending length was measured based on the above, and the bending resistance was evaluated. Table 3 shows the obtained results. In the table, the bending length in the vertical direction is measured by taking the fiber direction in the fiber web as the length direction, and the bending length in the horizontal direction is defined as a direction forming an angle of 90 ° with the fiber direction in the fiber web. It is measured as the vertical direction.
【００４６】[0046]
【表３】 [Table 3]
【００４７】[0047]
【発明の効果】以上説明した通り、本発明の不織布によ
れば、収縮した繊維層と非収縮性繊維からなる少なくと
も２種類の繊維から構成される不織布であって、部分的
に熱融着部により厚さ方向に一体化され、かつ各熱融着
部の間の非熱融着部では前記非収縮性繊維が表層部分に
突出して凸部を形成していることにより、柔軟で係合力
が高くかつコストの安い面ファスナー雌材に適した表面
に凹凸を有する不織布を実現できる。As described above, according to the nonwoven fabric of the present invention, the nonwoven fabric is composed of at least two kinds of fibers consisting of a contracted fiber layer and a non-shrinkable fiber, and is partially heat-sealed. In the non-heat-sealed portion between the heat-sealed portions, the non-shrinkable fibers protrude to the surface layer portion to form a convex portion, thereby being flexible and engaging force. A nonwoven fabric having irregularities on the surface suitable for a high-cost and low-cost hook-and-loop fastener female material can be realized.
【００４８】次に本発明の面ファスナー雌材によれば、
前記の表面に凹凸を有する不織布を用いて、非収縮性繊
維が表層部分に突出して形成された凸部を、面ファスナ
ー雄材のフック部との係合部として使用することによ
り、柔軟で係合力が高くかつコストの安い面ファスナー
雌材を実現できる。Next, according to the hook-and-loop fastener female material of the present invention,
Using a non-woven fabric having irregularities on the surface, a convex portion formed by projecting non-shrinkable fibers to a surface layer portion is used as an engaging portion with a hook portion of a male surface fastener, so that a soft engaging force is obtained. A high-cost and low-cost hook-and-loop fastener female material can be realized.
【００４９】次に本発明の方法によれば、前記不織布及
び面ファスナー雌材を効率良く合理的に製造できる。本
発明の不織布は、表面に微細な凹凸を有し、面ファスナ
ー雌材に非常に適した構造となっている。そして、各熱
融着部の間に形成された凸部においては繊維の自由度が
比較的高く嵩高であるため、本発明の不織布は汎用され
ている面ファスナー雌材に比べて著しく柔軟性に富んだ
ものとなっている。それ故に、これを使い捨ておむつな
どに使用した場合、着用者に違和感を与えることがな
い。更に本発明の不織布は、複雑な製造工程を経ること
なく、積層されたウエブを熱ロールを用いて加工するこ
とにより得られるので、比較的安価に生産することがで
きる。従って、本発明の不織布は、柔軟性と低コストが
要求されているおむつなどのディスポーザブル商品に使
用される面ファスナー雌材として特に好ましく使用する
ことが出来る。Next, according to the method of the present invention, the nonwoven fabric and the female surface fastener can be efficiently and rationally manufactured. The nonwoven fabric of the present invention has fine irregularities on the surface, and has a structure very suitable for a female fastener material. And, since the degree of freedom of the fibers is relatively high and bulky in the convex portions formed between the heat-sealed portions, the nonwoven fabric of the present invention is significantly more flexible than the general-purpose surface fastener female material. It has become rich. Therefore, when this is used for a disposable diaper or the like, the wearer does not feel uncomfortable. Furthermore, the nonwoven fabric of the present invention can be produced at a relatively low cost because it is obtained by processing the laminated web using a hot roll without going through a complicated manufacturing process. Therefore, the nonwoven fabric of the present invention can be particularly preferably used as a female material of a hook-and-loop fastener used for disposable products such as diapers that require flexibility and low cost.
【図１】 本発明の実施例１で得られた不織布の平面図
である。FIG. 1 is a plan view of a nonwoven fabric obtained in Example 1 of the present invention.
【図２】 本発明の実施例１で得られた不織布の裏面図
である。FIG. 2 is a back view of the nonwoven fabric obtained in Example 1 of the present invention.
【図３】 本発明の実施例１で得られた不織布の模式的
断面図である。FIG. 3 is a schematic sectional view of the nonwoven fabric obtained in Example 1 of the present invention.
１ 不織布 ２ 第一繊維層 ３ 第二繊維層 ４ 凹部（融着部） ５ 凸部 DESCRIPTION OF SYMBOLS 1 Nonwoven fabric 2 First fiber layer 3 Second fiber layer 4 Concave part (fused part) 5 Convex part
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平６−33359（ＪＰ，Ａ) 特開 平７−300753（ＪＰ，Ａ) 特開 昭63−235560（ＪＰ，Ａ) 特開 昭61−132666（ＪＰ，Ａ) 特開 平７−316968（ＪＰ，Ａ) 特開 平２−234965（ＪＰ，Ａ) 特開 平７−171011（ＪＰ，Ａ) 特開 平11−302963（ＪＰ，Ａ) 国際公開01／11130（ＷＯ，Ａ１) (58)調査した分野(Int.Cl.7，ＤＢ名) D04H 1/00 - 18/00 A44B 13/00 - 18/00 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-33359 (JP, A) JP-A-7-300573 (JP, A) JP-A-63-235560 (JP, A) JP-A-61-1985 132666 (JP, A) JP-A-7-316968 (JP, A) JP-A-2-234965 (JP, A) JP-A-7-171011 (JP, A) JP-A-11-302963 (JP, A) WO 01/11130 (WO, A1) (58) Fields investigated (Int. Cl. 7 , DB name) D04H 1/00-18/00 A44B 13/00-18/00
Claims (10)
もしくは両面に、非収縮性短繊維を含む第二繊維層が積
層されてなる不織布であって、前記両繊維層は部分的に
熱融着部により厚さ方向に一体化され、かつ各熱融着部
の間では前記第一繊維層の熱収縮により、前記第二繊維
層が表層部分に突出して規則的な凸部を形成しているこ
とを特徴とする表面に凹凸を有する不織布。On one or both surfaces of the 1. A first fibrous layer comprising a heat-shrinkable fibers, a nonwoven fabric the second fibrous layer formed by laminating containing non-shrinkable short fibers, the two fibrous layers partially It is integrated in the thickness direction by the heat-sealed portion, and between the heat- sealed portions, the second fiber layer protrudes to the surface layer portion to form a regular convex portion due to the heat shrinkage of the first fiber layer. A non-woven fabric having irregularities on its surface, characterized in that it is made.
５０％である熱収縮性繊維が熱収縮した繊維を５０重量
％以上含み、第二繊維層は前記熱収縮性繊維が収縮する
温度では実質的に熱収縮しない非収縮性短繊維からな
り、かつ第一繊維層もしくは第二繊維層の少なくとも一
方の繊維層に熱融着性繊維が不織布中３０重量％以上含
まれており、両繊維層は前記熱融着繊維により部分的に
熱融着している請求項１に記載の表面に凹凸を有する不
織布。2. The first fiber layer contains at least 50% by weight of heat-shrinkable fiber having a maximum heat shrinkage of at least 50%, and the second fiber layer has a temperature at which the heat-shrinkable fiber shrinks. In the nonwoven fabric, non-shrinkable short fibers that do not substantially shrink thermally, and at least one of the first fiber layer and the second fiber layer contains at least 30% by weight of the heat-fusible fiber in the nonwoven fabric. The nonwoven fabric having irregularities on the surface according to claim 1, wherein the fiber layer is partially heat-sealed by the heat-sealing fiber.
繊維が、融解ピーク温度（Ｔｍ℃）が１３０＜Ｔｍ＜１
４５のエチレン−プロピレンランダムコポリマーを７０
重量％以上含むポリマーからなる繊維である請求項１に
記載の表面に凹凸を有する不織布。3. The fiber constituting the contracted fiber layer of the first fiber layer has a melting peak temperature (Tm ° C.) of 130 <Tm <1.
45 ethylene-propylene random copolymers into 70
The nonwoven fabric having irregularities on the surface according to claim 1, wherein the nonwoven fabric is a fiber made of a polymer containing not less than% by weight.
ン−プロピレンランダムコポリマーを鞘成分に配置し、
芯成分にポリオレフィン成分を配置した芯鞘型複合短繊
維である請求項１に記載の表面に凹凸を有する不織布。4. The non-shrinkable short fiber of the second fiber layer comprises an ethylene-propylene random copolymer arranged in a sheath component,
Core-sheath composite short fiber with polyolefin component in core component
The nonwoven fabric having irregularities on its surface according to claim 1, which is a fiber.
１．５〜１０デニール、かつ繊維長３８〜７６ｍｍの範
囲のステープルファイバー（短繊維）である請求項１に
記載の表面に凹凸を有する不織布。5. The surface according to claim 1, wherein the non-shrinkable short fibers of the second fiber layer are staple fibers (short fibers) having a fineness of 1.5 to 10 denier and a fiber length of 38 to 76 mm. Nonwoven fabric with irregularities.
面に凹凸を有する不織布であって、非収縮性短繊維が表
層部分に突出して形成された規則的な凸部が、面ファス
ナー雄材のフック部との係合部であることを特徴とする
面ファスナー雌材。6. The nonwoven fabric having irregularities on the surface according to any one of claims 1 to 5, wherein the regular convex portions formed by projecting non-shrinkable short fibers to the surface layer have a surface. A hook-and-loop fastener female material, which is an engaging portion with a hook portion of the male fastener material.
とも５０％である熱収縮性繊維を５０重量％以上含んで
おり、第二繊維層として前記熱収縮性繊維が収縮する温
度では実質的に熱収縮しない非収縮性短繊維からなり、
かつ前記第一繊維層または前記第二繊維層の少なくとも
一方の繊維層に熱融着性繊維を不織布中３０重量％以上
含む繊維層を用意し、第一繊維層の片面または両面に第
二繊維層を積層し、加熱エンボスロールを用いて上記熱
収縮性繊維の融点近傍の温度で加熱加圧処理を施すこと
により、両繊維層を部分的に熱融着させると同時に、前
記熱収縮性繊維を熱収縮させて、第二繊維層を各熱融着
部の間の表層部分に突出させて規則的な凸部を形成させ
ることを特徴とする表面に凹凸を有する不織布の製造方
法。7. The first fiber layer contains at least 50% by weight of heat-shrinkable fibers having a maximum heat shrinkage of at least 50%, and the second fiber layer is substantially at a temperature at which the heat-shrinkable fibers shrink. Made of non-shrinkable short fibers that do not shrink
And the heat-fusible fibers prepared fibrous layer comprising 30 wt% or more nonwoven fabric on at least one fiber layer of the first fibrous layer or the second fiber layer, the second fiber on one or both sides of the first fiber layer The heat-shrinkable fibers are partially heat-sealed by laminating the layers and applying heat and pressure to the heat-shrinkable fibers at a temperature near the melting point of the heat-shrinkable fibers using a heated embossing roll. It was allowed to heat shrinkage, the method for producing non-woven fabric having an uneven surface, characterized in that to form regular projecting portions to project into the surface layer portion between each heat fused portion and the second fibrous layer.
ル、繊維長３８〜７６ｍｍのステープルファイバーで構
成された目付１０〜４０ｇ／ｍ2の短繊維ウエブである
請求項７に記載の不織布の製造方法。8. The short fiber web according to claim 7, wherein the second fiber layer is a staple fiber having a fineness of 1.5 to 10 denier and a fiber length of 38 to 76 mm and a basis weight of 10 to 40 g / m 2 . Manufacturing method of nonwoven fabric.
かつ目付１０〜４０ｇ／ｍ2の範囲のパラレルウエブで
ある請求項７に記載の不織布の製造方法。9. The first fiber layer has a fiber length of 38 to 76 mm,
And method for producing a nonwoven fabric according to claim 7, which is a basis weight of 10 to 40 g / m 2 in the range of the parallel web.
０．３５〜１ｍｍ2の小突起が１ｃｍ2あたり１０〜１０
０個配設されたものを用い、熱融着部の不織布表面に占
める面積割合が１０〜５０％である不織布を形成する請
求項７に記載の不織布の製造方法。10. As embossing rolls, small projections having a top surface area of 0.35 to 1 mm 2 are formed in an amount of 10 to 10 per cm 2.
The method for producing a nonwoven fabric according to claim 7, wherein a nonwoven fabric is used in which the area ratio of the heat-fused portion to the surface of the nonwoven fabric is 10 to 50% by using zero disposition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15506295A JP3181195B2 (en) | 1995-06-22 | 1995-06-22 | Nonwoven fabric and surface fastener female material having irregularities on the surface and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15506295A JP3181195B2 (en) | 1995-06-22 | 1995-06-22 | Nonwoven fabric and surface fastener female material having irregularities on the surface and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH093755A JPH093755A (en) | 1997-01-07 |
| JP3181195B2 true JP3181195B2 (en) | 2001-07-03 |
Family
ID=15597842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15506295A Expired - Lifetime JP3181195B2 (en) | 1995-06-22 | 1995-06-22 | Nonwoven fabric and surface fastener female material having irregularities on the surface and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3181195B2 (en) |
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