JP2002105826A - Porous nonwoven fabric and method of producing the same - Google Patents
Porous nonwoven fabric and method of producing the sameInfo
- Publication number
- JP2002105826A JP2002105826A JP2000295560A JP2000295560A JP2002105826A JP 2002105826 A JP2002105826 A JP 2002105826A JP 2000295560 A JP2000295560 A JP 2000295560A JP 2000295560 A JP2000295560 A JP 2000295560A JP 2002105826 A JP2002105826 A JP 2002105826A
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- Prior art keywords
- fiber
- adhesive
- nonwoven fabric
- fibers
- weight
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、優れた柔軟性と優
れた耐摩耗性とを兼ね備えた、ふき取り布、おむつ部
材、壁装材、内装材、ガーゼ、水切りシート及び袋、排
水溝ゴミ取りシート、簡易液体フィルター、マスク内ろ
材などに用いられ、特にふき取り布に好適な開孔不織布
及びその製造法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiping cloth, a diaper member, a wall covering material, an interior material, a gauze, a draining sheet and a bag, and a drain gutter having excellent flexibility and excellent wear resistance. The present invention relates to an apertured nonwoven fabric which is used for a sheet, a simple liquid filter, a mask inner filter material, etc., and is particularly suitable for a wipe cloth, and a method for producing the same.
【０００２】[0002]
【従来の技術】柔軟性があり、強度のある不織布とし
て、水流絡合により繊維間を交絡させ熱接着性繊維によ
って繊維交点を接着させた様々な不織布が、従来より提
案されている。たとえば、特開平１０−２３７７５１号
公報には、潜在捲縮性複合繊維２０〜５０％と非熱接着
繊維８０〜５０％からなるウエブを、水流絡合により繊
維を交絡させ、熱処理を施して、潜在捲縮複合繊維の捲
縮を発現すると同時に低融点成分を熱接着させた、柔軟
性と触感に優れた不織布が提案されている。しかし、こ
の不織布は開孔していないため、拭き取り性や通気性や
通水性に劣るものであった。また、特開平９−３０２５
６２号公報には、高圧流体流の作用により繊維同士が交
絡し、かつ繊維が再配列されて開孔が形成された不織布
が、横方向に伸長されてなる開孔不織布であって、熱可
塑性繊維の一部が熱融着している開孔不織布が提案され
ている。しかし、このような不織布は、ドレープ性の向
上と横方向の強度向上はみられるものの、熱融着した熱
可塑性繊維の比率が少ない場合は繊維の抜けが多く耐摩
耗性に劣り、熱融着した熱可塑性繊維の比率が多い場合
は、風合いが硬く柔軟性に劣るものであった。さらに開
孔不織布を生産するに際して、開孔形成用支持体より開
孔不織布を剥離する際に、開孔形成用支持体に一部絡ん
でいた繊維が引っ張られ、開孔形成用支持体に接した面
で毛羽が発生してしまうという問題があった。そして、
このような開孔不織布を、ふき取り布、おむつ部材、壁
装材、内装材、ガーゼ、水切りシート及び袋、排水溝ゴ
ミ取りシート、簡易液体フィルター、マスク内ろ材等に
用いると毛羽の多い面が耐摩耗性に劣るという問題があ
った。また、この発生した毛羽を止めるため、開孔不織
布全体の接着性繊維の比率を多くすると、風合いが硬く
なり、柔軟性に劣ってしまうという問題があった。2. Description of the Related Art As flexible and strong nonwoven fabrics, various nonwoven fabrics have been proposed in which fibers are entangled by water entanglement and fiber intersections are bonded by thermoadhesive fibers. For example, Japanese Patent Application Laid-Open No. 10-237751 discloses that a web composed of 20 to 50% of a latently crimpable conjugate fiber and 80 to 50% of a non-heat-bonded fiber is entangled with the fiber by a hydroentanglement and subjected to a heat treatment. There has been proposed a nonwoven fabric which exhibits the crimp of a latently crimped conjugate fiber and, at the same time, heat-bonds a low melting point component, and has excellent flexibility and tactile sensation. However, since this nonwoven fabric was not open, it was poor in wiping properties, air permeability and water permeability. Also, Japanese Patent Application Laid-Open No. 9-3025
No. 62 discloses a nonwoven fabric in which fibers are entangled by the action of a high-pressure fluid flow, and the fibers are rearranged to form apertures. An apertured nonwoven fabric in which some of the fibers are heat-sealed has been proposed. However, although such a nonwoven fabric has improved drapability and improved strength in the lateral direction, when the proportion of the thermoplastic fiber that has been heat-sealed is small, the fiber often comes off and the abrasion resistance is poor. When the proportion of the obtained thermoplastic fiber was large, the texture was hard and the flexibility was poor. Further, in producing the apertured nonwoven fabric, when the apertured nonwoven fabric is peeled from the apertured formation support, the fibers partially entangled in the apertured formation support are pulled and come into contact with the apertured formation support. There is a problem that fluff is generated on the surface that has been made. And
When such an open non-woven fabric is used for a wipe cloth, a diaper member, a wall covering material, an interior material, a gauze, a draining sheet and a bag, a drainage dirt removing sheet, a simple liquid filter, a mask inner filter material, etc. There is a problem that the wear resistance is poor. In addition, when the ratio of the adhesive fibers in the whole nonwoven fabric with holes is increased in order to stop the generated fluff, there is a problem that the texture becomes hard and the flexibility is inferior.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、上記のよう
な問題点を解決するためになされたものであり、相反す
る特性である優れた柔軟性と優れた耐摩耗性とを兼ねそ
なえた、しかも両面ともに耐摩耗性に優れた、ふき取り
布、おむつ部材、壁装材、内装材、ガーゼ、水切りシー
ト及び袋、排水溝ゴミ取りシート、簡易液体フィルタ
ー、マスク内ろ材などに用いられ、特にふき取り布に好
適な開孔不織布及びその製造法を提供することを課題と
する。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has both excellent flexibility and excellent wear resistance, which are contradictory characteristics. In addition, it is used for wiping cloth, diaper members, wall covering materials, interior materials, gauze, draining sheets and bags, drainage dirt removing sheets, simple liquid filters, mask inner filter materials, etc. It is an object of the present invention to provide an apertured nonwoven fabric suitable for a wipe and a method for producing the same.
【０００４】[0004]
【課題を解決するための手段】請求項１の発明は、接着
性繊維５〜３０重量％と該接着性繊維以外の繊維７０〜
９５重量％からなり、繊維が３次元的に絡合された開孔
不織布であって、該開孔不織布の表面層と裏面層におい
て該接着性繊維の重量比率が５％以上異なり、かつ該表
面層と該裏面層において該接着性繊維が繊維接着してい
ることを特徴とする開孔不織布である。すなわち、本発
明では繊維が３次元的に絡合されているため、風合いが
柔軟であり拭き取り布などとしての実用的な強度のある
繊維構造物となっており、さらに繊維間が接着性繊維に
よって接着されているため耐摩耗性のある繊維構造物と
なっている。また、前記接着性繊維は前記繊維構造物全
体の５〜３０重量％であるため前記接着性繊維の熱接着
による風合いの変化は大きくなく実用に適合した柔軟な
風合いが維持できる。また、前記繊維構造物は水流の作
用等によって繊維配向を変えられて作られた表面から裏
面に貫通する開孔を有しているため、拭き取り性、通気
性、通水性に優れた構造となっている。さらに本発明で
は、水流の作用により繊維が３次元的に絡合される際
に、前記繊維構造物において毛羽が多くでる面側、すな
わち開孔形成用支持体に接する面側に属する層（表面層
または裏面層）に含まれる接着性繊維の重量比率が反対
面に属する層（裏面層または表面層）に含まれる接着性
繊維の重量比率よりも５％以上多くなっているため、開
孔形成用支持体に接する面である、毛羽が多くでる面で
の毛羽立ちが防止され耐摩耗性が向上し、他の面と同様
の耐摩耗性を示すことができる。また前記繊維構造物に
おいて１本の繊維に注目すると、この繊維は３次元的に
絡合されているため、表面層と裏面層の両層において他
の繊維と交絡点を持っている。そして、毛羽が多くでる
面側に属する層では接着性繊維との交絡点において接着
が充分に行われるため、繊維の抜けが起こりにくくな
る。その結果、前記繊維構造物は毛羽が多くでる面の反
対面においても繊維の抜けが起こりにくくなり、良好な
耐摩耗性を呈することができる。そしてまた、毛羽が多
くでる面の反対面に属する層に含まれる接着繊維の重量
比率が毛羽が多くでる面に属する層より５％以上少ない
ため、反対面も接着繊維が同じ重量比率である場合と比
較して、前記繊維構造物全体の接着点は少なくなり、前
記繊維構造物はより柔軟な風合となる。このように、本
発明では、接着点を多く持つ層を片面に偏在させること
によって、偏在させない場合の耐摩耗性と同等の耐摩耗
性を両面ともに保ちながら、風合いをさらに柔軟にする
ことができるため、ふき取り布、おむつ部材、壁装材、
内装材、ガーゼ、水切りシート及び袋、排水溝ゴミ取り
シート、簡易液体フィルター、マスク内ろ材などに好適
な開孔不織布を提供することができる。また、本発明の
開孔不織布をふき取り布に用いると、開孔部分にゴミを
補足することができ、また開孔不織布とふき取りされる
面との間の接触面積が少なくなるので、摩擦による抵抗
が少なくふき取り易い。このため本発明の開孔不織布は
特にふき取り布に好適である。According to the first aspect of the present invention, there is provided a method for producing a fiber comprising 5 to 30% by weight of an adhesive fiber and 70 to 30% by weight of a fiber other than the adhesive fiber.
95% by weight, wherein the fibers are three-dimensionally entangled, and the weight ratio of the adhesive fibers in the surface layer and the back surface layer is different by 5% or more, and An apertured nonwoven fabric, wherein the adhesive fibers are fiber-adhered in a layer and the back layer. That is, in the present invention, the fibers are three-dimensionally entangled, so that the texture is soft and a fibrous structure having practical strength as a wiping cloth or the like is formed. The fiber structure is abrasion resistant because it is bonded. In addition, since the adhesive fiber accounts for 5 to 30% by weight of the entire fiber structure, a change in hand due to thermal bonding of the adhesive fiber is not large, and a soft hand suitable for practical use can be maintained. Further, since the fiber structure has an opening penetrating from the front surface to the back surface made by changing the fiber orientation by the action of water flow or the like, the structure has excellent wiping properties, air permeability, and water permeability. ing. Further, in the present invention, when the fibers are three-dimensionally entangled by the action of the water flow, a layer (surface) belonging to the surface side of the fiber structure where the fluff is increased, that is, the surface side in contact with the opening forming support. Since the weight ratio of the adhesive fibers contained in the layer (back layer or back layer) is 5% or more larger than the weight ratio of the adhesive fibers contained in the layer (back layer or front layer) belonging to the opposite surface, the opening is formed. The fluff on the surface where the fluff is large, which is the surface in contact with the support, is prevented, the wear resistance is improved, and the same wear resistance as the other surfaces can be exhibited. When attention is paid to one fiber in the fibrous structure, since this fiber is three-dimensionally entangled, both the surface layer and the back surface layer have entanglement points with other fibers. Then, in the layer belonging to the side where the fluff is increased, the adhesion is sufficiently performed at the entanglement point with the adhesive fiber, so that the fiber hardly comes off. As a result, the fiber structure is less likely to come off the fiber even on the surface opposite to the surface where the fluff is increased, and can exhibit good abrasion resistance. Also, since the weight ratio of the adhesive fibers contained in the layer belonging to the surface opposite to the surface having a large amount of fluff is at least 5% less than the layer belonging to the surface having a large amount of fluff, the opposite surface has the same weight ratio of the adhesive fibers. As compared with the above, the number of bonding points of the entire fiber structure is reduced, and the fiber structure has a softer feeling. As described above, in the present invention, by unevenly distributing the layer having many adhesion points on one surface, the texture can be further softened while maintaining the same abrasion resistance on both surfaces as the abrasion resistance when not unevenly distributed. For, wipe cloth, diaper member, wall covering,
An apertured nonwoven fabric suitable for an interior material, a gauze, a drainer sheet and a bag, a drainage dust removal sheet, a simple liquid filter, a mask inner filter material, and the like can be provided. Further, when the perforated nonwoven fabric of the present invention is used for a wipe cloth, dust can be trapped in the perforated portion, and the contact area between the perforated nonwoven fabric and the surface to be wiped is reduced, so that resistance due to friction is reduced. Less and easy to wipe off. For this reason, the perforated nonwoven fabric of the present invention is particularly suitable for a wipe cloth.
【０００５】請求項２の発明は、接着性繊維が５〜２０
重量％と該接着性繊維以外の繊維が８０〜９５重量％か
らなることを特徴とする請求項１に記載の開孔不織布で
あり、請求項１に記載の開孔不織布において、接着性繊
維を５〜２０重量％とすることにより、特に柔軟性に優
れた開孔不織布を得ることができる。According to a second aspect of the present invention, the adhesive fiber is 5-20
The perforated nonwoven fabric according to claim 1, wherein the fiber other than the adhesive fiber comprises 80 to 95% by weight of the nonwoven fabric. By setting the content to 5 to 20% by weight, an open nonwoven fabric having particularly excellent flexibility can be obtained.
【０００６】請求項３の発明は、接着性繊維が潜在捲縮
性繊維であることを特徴とする請求項１または２に記載
の開孔不織布である。すなわち、請求項１または２に記
載の開孔不織布において、例えば、芯鞘タイプの複合繊
維で、鞘部分が芯部分より低融点の重合体であり、加熱
処理により捲縮を発現するのみならず鞘部分が他の繊維
と接着するような繊維を用いることによって、接着性繊
維としての働きにより、請求項１または２に記載の開孔
不織布を得ることができるとともに、捲縮発現により毛
羽立ち防止の効果があるため、特に毛羽立ちの少ない開
孔不織布を得ることができる。The invention according to claim 3 is the perforated nonwoven fabric according to claim 1 or 2, wherein the adhesive fiber is a latently crimpable fiber. In other words, in the open nonwoven fabric according to claim 1 or 2, for example, a core-sheath type composite fiber, in which the sheath portion is a polymer having a lower melting point than the core portion, and not only exhibits crimping by heat treatment but also By using a fiber whose sheath portion is bonded to another fiber, the nonwoven fabric according to claim 1 or 2 can be obtained by acting as an adhesive fiber, and at the same time, the generation of crimp prevents fuzz. Since it is effective, it is possible to obtain an apertured nonwoven fabric with less fuzz.
【０００７】請求項４の発明は、親水性繊維を３０重量
％以上含むことを特徴とする請求項１〜３のいずれかに
記載の開孔不織布であり、請求項１〜３のいずれかに記
載の開孔不織布において、親水性繊維を３０重量％以上
含むことにより、ふき取り布、おむつ部材、壁装材、内
装材、ガーゼ、水切りシート及び袋、排水溝ゴミ取りシ
ート、簡易液体フィルター、マスク内ろ材などの用途の
うち特に親水性の要求される場合に好適な開孔不織布を
得ることができる。According to a fourth aspect of the present invention, there is provided the perforated nonwoven fabric according to any one of the first to third aspects, wherein the nonwoven fabric contains 30% by weight or more of hydrophilic fibers. In the nonwoven fabric having an opening described above, by including a hydrophilic fiber in an amount of 30% by weight or more, a wiping cloth, a diaper member, a wall covering material, an interior material, a gauze, a draining sheet and a bag, a drainage dirt removing sheet, a simple liquid filter, and a mask An open non-woven fabric suitable for a case where hydrophilicity is particularly required among uses such as an inner filter material can be obtained.
【０００８】請求項５の発明は、絡合が水流絡合法によ
るものである請求項１〜４のいずれかに記載の開孔不織
布であり、請求項１〜４のいずれかに記載の開孔不織布
において、絡合を水流絡合法によって形成することによ
り、絡合と同時に開孔を形成することができ、またニー
ドルパンチ法では得ることのできない重量の低い開孔不
織布を得ることができる。The invention according to claim 5 is the nonwoven fabric according to any one of claims 1 to 4, wherein the entanglement is performed by a hydroentanglement method. In the nonwoven fabric, by forming the entanglement by the hydroentanglement method, it is possible to form an opening at the same time as the entanglement, and it is possible to obtain an open nonwoven fabric having a low weight that cannot be obtained by the needle punch method.
【０００９】請求項６の発明は、接着性繊維と該接着性
繊維以外の繊維からなる繊維ウエブＡと、繊維ウエブＡ
よりも接着性繊維の重量比率が５％以上少ない繊維ウエ
ブＢとを形成するに際して、繊維ウエブＡと繊維ウエブ
Ｂとに含まれる合計の繊維に対して、該接着性繊維が５
〜３０重量％及び該接着性繊維以外の繊維が７０〜９５
重量％となるように形成した後、繊維ウエブＡが最下層
に、繊維ウエブＢが最上層になるように、開孔形成用支
持体の上に繊維ウエブを積層載置した後、積層した繊維
ウエブに水流処理により積層した繊維ウエブを絡合及び
開孔させた後、該接着性繊維の繊維接着処理を行う開孔
不織布の製造方法であり、絡合と開孔により開孔不織布
に柔軟性を与え、さらに繊維接着処理により繊維の抜け
を防ぎ開孔不織布の耐摩耗性を向上させることができ
る。また、開孔形成用支持体より剥離する際に生じた、
繊維ウエブＡから発生した毛羽は、繊維ウエブＡ中の接
着性繊維の配合比率が多いため、充分に押さえることが
できる。また、接着性繊維は片面のみが多くなっている
ので開孔不織布全体が硬くなることはない。このよう
に、接着点を多く持つ層を片面に偏在させることによっ
て、偏在させない場合の耐摩耗性と同等の耐摩耗性を両
面ともに保ちながら、偏在させない場合よりも風合いを
柔軟にする効果を得ることができるため、ふき取り布、
おむつ部材、壁装材、内装材、ガーゼ、水切りシート及
び袋、排水溝ゴミ取りシート、簡易液体フィルター、マ
スク内ろ材などに好適な開孔不織布を提供することがで
きる。また、本発明の開孔不織布をふき取り布に用いる
と、開孔部分にゴミを補足することができ、また開孔不
織布とふき取りされる面との間の接触面積が少なくなる
ので、摩擦による抵抗が少なくふき取り易い。このため
本発明の開孔不織布は特にふき取り布に好適である。The invention according to claim 6 is a fiber web A comprising an adhesive fiber and a fiber other than the adhesive fiber;
When forming the fiber web B in which the weight ratio of the adhesive fiber is 5% or less than that of the adhesive fiber, the adhesive fiber is 5% of the total fiber contained in the fiber web A and the fiber web B.
30% by weight and 70 to 95% of fibers other than the adhesive fiber
% By weight, and the fiber web A is placed on the support for forming holes so that the fiber web A is on the lowermost layer and the fiber web B is on the uppermost layer. This is a method for producing an open nonwoven fabric in which a fiber web laminated on a web by a water flow treatment is entangled and opened, and then a fiber bonding treatment of the adhesive fiber is performed. In addition, the fiber bonding treatment can prevent fibers from coming off and improve the abrasion resistance of the apertured nonwoven fabric. Also, when peeled from the opening forming support,
The fluff generated from the fiber web A can be sufficiently suppressed because the mixing ratio of the adhesive fibers in the fiber web A is large. In addition, since the adhesive fibers are increased on only one side, the whole non-woven fabric with holes is not hardened. As described above, by distributing the layer having many adhesion points on one surface, it is possible to obtain an effect of softening the texture as compared with the case where the distribution is not uneven, while maintaining the wear resistance equivalent to the wear resistance when not unevenly distributed on both surfaces. Because it can wipe cloth,
An apertured nonwoven fabric suitable for a diaper member, a wall covering material, an interior material, a gauze, a drainer sheet and a bag, a drainage dust removal sheet, a simple liquid filter, a mask inner filter material, and the like can be provided. Further, when the perforated nonwoven fabric of the present invention is used for a wipe cloth, dust can be trapped in the perforated portion, and the contact area between the perforated nonwoven fabric and the surface to be wiped is reduced, so that resistance due to friction is reduced. Less and easy to wipe off. For this reason, the perforated nonwoven fabric of the present invention is particularly suitable for a wipe cloth.
【００１０】[0010]
【発明の実施の形態】本発明は、接着性繊維５〜３０重
量％と該接着性繊維以外の繊維７０〜９５重量％からな
り、繊維が３次元的に絡合された開孔不織布であって、
該開孔不織布の表面層と裏面層において該接着性繊維の
重量比率が５％以上異なり、かつ該表面層と該裏面層に
おいて該接着性繊維が繊維接着していることを特徴とす
る開孔不織布である。BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to an apertured nonwoven fabric comprising 5 to 30% by weight of adhesive fibers and 70 to 95% by weight of fibers other than the adhesive fibers, wherein the fibers are three-dimensionally entangled. hand,
The aperture characterized in that the weight ratio of the adhesive fibers in the surface layer and the back layer of the apertured nonwoven fabric is different by 5% or more, and the adhesive fibers are fiber-bonded in the surface layer and the back layer. It is a non-woven fabric.
【００１１】また本発明は、接着性繊維と該接着性繊維
以外の繊維からなる繊維ウエブＡと、繊維ウエブＡより
も接着性繊維の重量比率が５％以上少ない繊維ウエブＢ
とを形成するに際して、繊維ウエブＡと繊維ウエブＢと
に含まれる合計の繊維に対して、該接着性繊維が５〜３
０重量％及び該接着性繊維以外の繊維が７０〜９５重量
％となるように形成した後、繊維ウエブＡが最下層に、
繊維ウエブＢが最上層になるように、開孔形成用支持体
の上に繊維ウエブを積層載置した後、積層した繊維ウエ
ブに水流処理により積層した繊維ウエブを絡合及び開孔
させた後、該接着性繊維の繊維接着処理を行う開孔不織
布の製造方法である。The present invention also provides a fiber web A comprising an adhesive fiber and a fiber other than the adhesive fiber, and a fiber web B in which the weight ratio of the adhesive fiber is at least 5% less than the fiber web A.
Is formed, the adhesive fiber is 5 to 3 with respect to the total fiber contained in the fiber web A and the fiber web B.
0% by weight and the fibers other than the adhesive fibers are formed so as to be 70 to 95% by weight.
After laminating and placing the fiber web on the opening forming support so that the fiber web B is the uppermost layer, after entanglement and opening of the fiber web laminated by the water flow treatment on the laminated fiber web, And a method for producing a perforated nonwoven fabric for performing a fiber bonding treatment of the adhesive fiber.
【００１２】本発明に使用する接着性繊維は、該接着性
繊維以外の繊維よりも好ましくは１０°Ｃ以上低い融点
で溶融する繊維であり、１種類の熱可塑性樹脂からなる
合成繊維か、または融点が好ましくは１０°Ｃ以上異な
る２種類以上の樹脂が複合された複合繊維であって、繊
維の表面に該接着性繊維以外の繊維よりも低い融点で溶
融する樹脂を有する複合繊維が好ましく、このような接
着性繊維を加熱した時、該接着性繊維の少なくとも一部
が８０°Ｃ以上、好ましくは１００°Ｃ以上で溶融する
繊維が適している。１種類の熱可塑性樹脂からなる合成
繊維としては、例えばポリオレフィン繊維、ポリエステ
ル繊維、ポリアミド繊維、アクリル繊維などの熱可塑性
樹脂からなる合成繊維がある。また融点の異なる２種類
以上の樹脂が複合された複合繊維としては、例えば、共
重合ポリエステル／ポリエステル、共重合ポリプロピレ
ン／ポリプロピレン、ポリプロピレン／ポリアミド、ポ
リエチレン／ポリプロピレン、ポリプロピレン／ポリエ
ステル、ポリエチレン／ポリエステルなどの樹脂の組み
合わせからなる複合繊維がある。The adhesive fiber used in the present invention is a fiber that is preferably melted at a melting point lower by at least 10 ° C. than fibers other than the adhesive fiber, and is a synthetic fiber made of one kind of thermoplastic resin, or A conjugate fiber having a melting point of preferably at least 10 ° C. or a conjugate of two or more resins different from each other, and a conjugate fiber having a resin that melts at a lower melting point than fibers other than the adhesive fiber on the surface of the fiber is preferable. When such adhesive fiber is heated, at least a part of the adhesive fiber melts at 80 ° C. or higher, preferably 100 ° C. or higher. Examples of the synthetic fiber made of one kind of thermoplastic resin include synthetic fibers made of thermoplastic resin such as polyolefin fiber, polyester fiber, polyamide fiber, and acrylic fiber. Examples of composite fibers in which two or more resins having different melting points are composited include resins such as copolymerized polyester / polyester, copolymerized polypropylene / polypropylene, polypropylene / polyamide, polyethylene / polypropylene, polypropylene / polyester, and polyethylene / polyester. There is a composite fiber consisting of a combination of the following.
【００１３】また、本発明に使用する接着性繊維は、上
記の複合繊維であるとともに潜在捲縮性繊維であること
がさらに好ましい。このような潜在捲縮性を併せ持つ複
合繊維としては、例えば温度特性の異なる複数の樹脂成
分から成る芯鞘型もしくはサイドバイサイド型といった
複合構造を有する繊維であって、樹脂成分中の１成分と
他の樹脂成分との間で熱収縮率及び溶融温度が、異なる
組み合わせとなっており、１つの樹脂成分が軟化して収
縮し、しかも他の樹脂成分が実質的に収縮しない温度で
熱処理を施すことによって、個々の繊維がコイル状（ま
たは、スパイラル状）の捲縮を持つようになる複合繊維
であり、さらに、この複合繊維は樹脂成分中の１成分の
溶融する温度まで熱処理を行えば接着繊維としても用い
ることができる複合繊維をあげることができる。このよ
うな複合繊維は、最適な捲縮発現条件を選んだ場合に、
外力がかからない状態で発現後の捲縮数が発現前の室温
での捲縮数の少なくとも２倍以上に増加するものが望ま
しく、例えば、室温で１０〜２０個／インチの捲縮数
が、繊維単独で外力がかからない状態で１１０〜１７０
℃で１５分間加熱した場合に、４０〜２００個／インチ
程度に増加するものが好ましい。The adhesive fiber used in the present invention is more preferably the above-mentioned conjugate fiber and a latently crimpable fiber. The composite fiber having such latent crimpability is, for example, a fiber having a composite structure such as a core-in-sheath type or a side-by-side type composed of a plurality of resin components having different temperature characteristics. The heat shrinkage and the melting temperature of the resin component are different from those of the resin component, and one resin component is softened and contracted, and heat treatment is performed at a temperature at which the other resin component does not substantially contract. A conjugate fiber in which each fiber has a coiled (or spiral) crimp, and the conjugated fiber becomes an adhesive fiber when heat-treated to a temperature at which one of the resin components is melted. And conjugate fibers which can also be used. Such a conjugate fiber, when the optimal crimp development conditions are selected,
It is desirable that the number of crimps after expression is increased to at least twice or more the number of crimps at room temperature before expression under the condition where no external force is applied. 110 to 170 when no external force is applied
When heated at 15 ° C. for 15 minutes, it is preferable to increase the number to about 40 to 200 pieces / inch.
【００１４】このような接着性と潜在捲縮性を併せ持つ
複合繊維としては、例えば、共重合ポリエステル／ポリ
エステル、共重合ポリプロピレン／ポリプロピレン、ポ
リプロピレン／ポリアミド、ポリエチレン／ポリプロピ
レン、ポリプロピレン／ポリエステル、ポリエチレン／
ポリエステルなどの樹脂の組み合わせからなる複合繊維
がある。このような複合繊維を加熱処理して捲縮を発現
させると、接着性繊維としての働きにより、本発明によ
る開孔不織布を得ることができるとともに、捲縮発現に
よる毛羽立ち防止の効果が生じて、特に毛羽立ちの少な
い開孔不織布を得ることができる。Examples of such composite fibers having both adhesiveness and latent crimpability include copolymerized polyester / polyester, copolymerized polypropylene / polypropylene, polypropylene / polyamide, polyethylene / polypropylene, polypropylene / polyester, and polyethylene / polyester.
There are composite fibers made of a combination of resins such as polyester. When such a composite fiber is subjected to heat treatment to exhibit crimping, by acting as an adhesive fiber, the perforated nonwoven fabric according to the present invention can be obtained, and the effect of preventing fuzzing due to the expression of crimping occurs, In particular, an apertured nonwoven fabric with less fluff can be obtained.
【００１５】本発明に使用する接着性繊維以外の繊維
は、該接着性繊維を構成する樹脂のうち接着成分となる
樹脂の融点より、好ましくは１０°Ｃ以上高い融点で溶
融する樹脂または成分から構成された繊維であり、合成
繊維や半合成繊維や天然繊維など繊維の種類は問わず適
宜選択できる。このような接着性繊維以外の繊維は、合
成繊維の場合は、１種類の熱可塑性樹脂からなる合成繊
維であっても、異なる２種類以上の樹脂が複合された複
合繊維であっても適宜選択して使用することができる。The fibers other than the adhesive fibers used in the present invention are made of a resin or a component that melts at a melting point higher than the melting point of the resin serving as an adhesive component, preferably 10 ° C. or more, of the resins constituting the adhesive fibers. It is a constituted fiber and can be appropriately selected irrespective of the type of fiber such as synthetic fiber, semi-synthetic fiber and natural fiber. In the case of a synthetic fiber, the fiber other than the adhesive fiber is appropriately selected from a synthetic fiber composed of one kind of thermoplastic resin and a composite fiber composed of two or more different kinds of resins. Can be used.
【００１６】本発明に使用する親水性繊維は、水に対し
て濡れ性の良い繊維が好ましく、吸水性の優れたものは
特に好ましく、合成繊維や半合成繊維や天然繊維など繊
維の種類は問わず適宜選択できる。このような親水性繊
維としては、例えばレーヨン繊維、コットン繊維、アセ
テート繊維、アクリル繊維などがある。本発明では、こ
のような親水性繊維を３０重量％以上含むことにより、
特に親水性の要求される、ふき取り布、おむつ部材、ガ
ーゼ、水切りシート及び袋、排水溝ゴミ取りシート、簡
易液体フィルター、マスク内ろ材などに好適な開孔不織
布を得ることができる。The hydrophilic fiber used in the present invention is preferably a fiber having good wettability with water, and particularly preferably a fiber having excellent water absorption. The type of fiber such as synthetic fiber, semi-synthetic fiber and natural fiber is not limited. Can be selected appropriately. Examples of such hydrophilic fibers include rayon fibers, cotton fibers, acetate fibers, and acrylic fibers. In the present invention, by containing 30% by weight or more of such a hydrophilic fiber,
In particular, an apertured nonwoven fabric suitable for a wiping cloth, a diaper member, a gauze, a drainer sheet and a bag, a drainage dirt removal sheet, a simple liquid filter, a mask inner filter material and the like, which require hydrophilicity, can be obtained.
【００１７】本発明の開孔不織布では、接着性繊維５〜
３０重量％と該接着性繊維以外の繊維７０〜９５重量％
からなる必要があるが、接着性繊維５〜２０重量％と該
接着性繊維以外の繊維８０〜９５重量％からなる場合、
柔軟性と耐摩耗性がともに優れ、好適である。接着性繊
維が５重量％未満である場合は、実用的な強度が不足
し、毛羽止めも不充分であり、また耐摩耗性のある開孔
不織布を得ることはできない。また接着性繊維が３０重
量％を超えると、風合いが硬くなり、本発明が目標とす
る各用途における柔軟性の要求を満たすことができな
い。[0017] In the nonwoven fabric of the present invention, the adhesive fibers 5
30% by weight and 70 to 95% by weight of fibers other than the adhesive fiber
It is necessary that the adhesive fiber is composed of 5 to 20% by weight of an adhesive fiber and 80 to 95% by weight of a fiber other than the adhesive fiber.
Both flexibility and abrasion resistance are excellent and suitable. When the amount of the adhesive fiber is less than 5% by weight, the practical strength is insufficient, the fuzz is insufficient, and the nonwoven fabric having abrasion resistance cannot be obtained. If the amount of the adhesive fiber exceeds 30% by weight, the hand becomes hard, and the demand for flexibility in each application targeted by the present invention cannot be satisfied.
【００１８】本発明の開孔不織布は、親水性繊維を３０
重量％以上含むことが望ましく、特に親水性の要求され
る、ふき取り布、おむつ部材、ガーゼ、水切りシート及
び袋、排水溝ゴミ取りシート、簡易液体フィルター、マ
スク内ろ材などに好適な開孔不織布を得ることができ
る。The open nonwoven fabric of the present invention contains 30 hydrophilic fibers.
A nonwoven fabric suitable for use as a wipe, a diaper member, a gauze, a drainer sheet and a bag, a drainage dust removal sheet, a simple liquid filter, a mask inner filter material, and the like, which is preferably contained in a weight percent or more, and in which hydrophilicity is particularly required. Obtainable.
【００１９】本発明の開孔不織布は、表面層と裏面層に
おいて該接着性繊維の重量比率が５％以上異なる必要が
ある。すなわち開孔形成用支持体に接する面側に属する
層（表面層または裏面層）に含まれる接着性繊維の重量
比率が反対面に属する層（裏面層または表面層）に含ま
れる接着性繊維の重量比率よりも５％以上多くなってい
ると、開孔形成用支持体に接する面である、毛羽が多く
でる面での毛羽立ちが防止され耐摩耗性が向上し、他の
面と同様の耐摩耗性を示すことができる。もし重量比率
の差を５％より少なくして、しかも耐摩耗性を両面同等
にしようとすると、開孔不織布中に含まれる接着繊維の
重量比率が必要以上に多くなってしまい、風合いが硬く
なり、本発明が目標とする各用途における柔軟性の要求
を満たすことができない。[0019] In the nonwoven fabric of the present invention, the weight ratio of the adhesive fibers in the front layer and the back layer must be different by 5% or more. That is, the weight ratio of the adhesive fibers contained in the layer (front layer or back layer) belonging to the surface side in contact with the support for opening formation has the weight ratio of the adhesive fibers contained in the layer belonging to the opposite surface (back layer or surface layer). When the weight ratio is 5% or more, the fluffing on the surface in contact with the support for forming holes, which has a large amount of fluff, is prevented, the abrasion resistance is improved, and the same resistance as other surfaces is obtained. It can show abrasion. If the difference in weight ratio is less than 5% and the wear resistance is made equal on both sides, the weight ratio of the adhesive fibers contained in the open nonwoven fabric becomes unnecessarily large, and the texture becomes hard. However, the present invention cannot satisfy the demand for flexibility in each application targeted by the present invention.
【００２０】本発明では、繊維層を積層する方法は、公
知の乾式法、湿式法、溶融紡糸法等のいずれかの繊維ウ
エブ形成法により積層するか、これらの方式を組み合わ
せて積層することができる。繊維ウエブを積層するに際
しては、接着性繊維５重量％以上からなる繊維ウエブを
繊維ウエブＡとし、接着性繊維５重量％以上からなる繊
維ウエブであって、繊維ウエブＡよりも接着性繊維の重
量比率が５％以上少ない繊維ウエブを繊維ウエブＢとす
ると、繊維ウエブＡと繊維ウエブＢに含まれる合計の繊
維に対して、該接着性繊維が５〜３０重量％及び該接着
性繊維以外の繊維が７０〜９５重量％となるように繊維
ウエブを積層する方法が望ましい。また、繊維ウエブＡ
は接着性繊維２０〜３０重量％と該接着性繊維以外の繊
維８０〜７０重量％からなるのが好適であり、繊維ウエ
ブＢは接着性繊維５〜１５重量％と該接着性繊維以外の
繊維９５〜８５重量％からなるのが好適である。In the present invention, the method of laminating the fiber layers may be lamination by any known fiber web forming method such as a dry method, a wet method, a melt spinning method, or a combination of these methods. it can. When laminating fiber webs, a fiber web composed of 5% by weight or more of adhesive fibers is referred to as a fiber web A, and a fiber web composed of 5% by weight or more of adhesive fibers. When the fiber web having a ratio of 5% or less is referred to as a fiber web B, the adhesive fiber is 5 to 30% by weight based on the total fibers contained in the fiber web A and the fiber web B, and a fiber other than the adhesive fiber is used. Is desirably a method of laminating the fiber webs so that the fiber web is 70 to 95% by weight. In addition, fiber web A
Is preferably composed of 20 to 30% by weight of an adhesive fiber and 80 to 70% by weight of a fiber other than the adhesive fiber, and the fiber web B is 5 to 15% by weight of an adhesive fiber and a fiber other than the adhesive fiber. It preferably comprises from 95 to 85% by weight.
【００２１】本発明では、積層した繊維層に絡合処理と
開孔処理を行う方法には、水流絡合法等における流体流
により絡合と開孔を同時に行う方法や、ニードルパンチ
法等により絡合させた後、例えば先の尖ったロールとブ
ラシロールの間に絡合された繊維層を通して繊維の配向
を変えながら開孔する方法等があるが、高速生産可能な
水流絡合法が好適である。In the present invention, the method of performing the entanglement treatment and the opening treatment on the laminated fiber layer includes a method of simultaneously performing the entanglement and the opening by a fluid flow such as a water entanglement method, and a method of entanglement by a needle punch method or the like. After being combined, for example, there is a method of opening while changing the orientation of the fiber through a fiber layer entangled between a pointed roll and a brush roll, and a water entanglement method capable of high-speed production is preferable. .
【００２２】水流絡合法による場合は、前記繊維ウエブ
Ａが最下層に、前記繊維ウエブＢが最上層なるように積
層した繊維層を開孔形成用支持体の上に載置する。開孔
形成用支持体は、金属またはプラスチックのネットから
なるコンベアーベルトや前記ネットを巻いた水透過性の
ドラムを用いるか、または金属、プラスチックでできた
孔の開いた水透過性のドラム等を用いることができる。
ネットの場合は、平織り、綾織り等各種の織り構造のネ
ットを用いることができ、５〜６０メッシュの織り組織
が適しているが、特に柔軟な風合いを得るには５〜３０
メッシュが適している。もし、６０メッシュを超える織
り組織を用いた場合は、開孔した不織布を形成するのが
困難となる。また、孔開きドラムを用いる場合は開孔面
積率が１０〜８０％の孔開きドラムが適している。In the case of the hydroentanglement method, a fiber layer in which the fiber web A is laminated on the lowermost layer and the fiber web B is laminated on the uppermost layer is placed on a support for forming pores. The support for forming an opening may be a conveyor belt made of a metal or plastic net or a water-permeable drum wound around the net, or a water-permeable drum having holes made of metal or plastic. Can be used.
In the case of a net, a net having various weave structures such as a plain weave and a twill weave can be used, and a weave of 5 to 60 mesh is suitable.
Mesh is suitable. If a woven structure exceeding 60 mesh is used, it is difficult to form an open nonwoven fabric. When a perforated drum is used, a perforated drum having a hole area ratio of 10 to 80% is suitable.
【００２３】次に、開孔形成用支持体上に載置した繊維
層の上部より高速水流を噴射して、繊維層を絡合させる
とともに開孔した繊維構造物を形成する。高速水流の発
生には、水圧３〜２０ＭＰａの高圧水を、直径０．１〜
０．３ｍｍのノズル孔が０．３〜３ｍｍ間隔で配列した
１本または複数本のノズルプレートより噴射させて、高
速水流とする方法が適している。Next, a high-speed water stream is sprayed from above the fiber layer placed on the support for forming holes to entangle the fiber layers and form a fiber structure having holes. To generate a high-speed water flow, high-pressure water with a water pressure of 3 to 20 MPa and a diameter of 0.1 to
A method in which 0.3 mm nozzle holes are jetted from one or a plurality of nozzle plates arranged at intervals of 0.3 to 3 mm to form a high-speed water flow is suitable.
【００２４】尚、上記の水流絡合法による開孔処理にお
いて、上記繊維層を上記開孔形成用支持体とは別の開孔
のある支持体の上に載置して、予め高速水流で予備的な
絡合処理を行ってから、上記の水流絡合による開孔処理
を行ってもよい。この予備的処理に用いる開孔のある支
持体は、上記開孔形成用支持体のメッシュや、開孔面積
率の値にこだわらず、任意の開孔のある支持体を選択し
て用いることができる。また、この予備的な絡合処理で
は、上記繊維層を開孔のある支持体の上に載置するに際
して上記繊維ウエブＡが最上層になっても、最下層にな
っても、どちらでも可能である。但し、この予備的な絡
合処理では、高速水流の噴射前の圧力は、予備処理後に
開孔を形成させる時の圧力よりも低くするのが望まし
く、またノズルプレートの使用本数を少なくするのが望
ましい。In the opening process by the water entanglement method, the fiber layer is placed on a support having an opening different from the opening forming support, and is preliminarily prepared by a high-speed water flow. After performing a typical entanglement process, the above-described opening process by water entanglement may be performed. The support having openings used for the preliminary treatment may be selected and used regardless of the mesh of the support for forming openings or the value of the area ratio of openings. it can. Further, in this preliminary entanglement treatment, when the fiber layer is placed on the support having openings, the fiber web A can be either the uppermost layer or the lowermost layer. It is. However, in this preliminary entanglement process, it is desirable that the pressure before the injection of the high-speed water flow is lower than the pressure at the time of forming the openings after the preliminary process, and that the number of nozzle plates used is reduced. desirable.
【００２５】本発明では、繊維層に絡合処理と開孔処理
を行った後、形成された繊維構造物に含まれる接着性繊
維による繊維接着処理を行う。繊維接着処理は実質的に
凹凸のないコンベアー上に繊維構造物を載置して熱風を
吹き付ける方法や、実質的に凹凸のないコンベアーまた
はドラム状の支持体の上に載置した後に熱風を繊維構造
物とその支持体を通過させる方法や、加熱したドラム状
の支持体の上に繊維構造物を載置する方法等によって行
うことが望ましい。In the present invention, after performing the entanglement process and the opening process on the fiber layer, the fiber bonding process is performed with the adhesive fiber contained in the formed fiber structure. The fiber bonding treatment involves placing a fiber structure on a conveyor having substantially no irregularities and blowing hot air, or placing the fibrous structure on a conveyor or a drum-like support having substantially no irregularities and then applying the hot air to the fiber. It is desirable to carry out by a method of passing the structure and its support or a method of placing the fiber structure on a heated drum-shaped support.
【００２６】このようにして形成された開孔不織布の開
孔は、繊維構造物の表面から裏面まで貫通していている
部分の面積が全表面の１０〜８０％であるのが好適であ
り、１０〜５０％が最適である。１０％未満では風合い
が硬く、８０％を超えると形態安定性を失うので好まし
くない。It is preferable that the area of the portion penetrating from the front surface to the back surface of the fibrous structure is 10 to 80% of the entire surface, 10 to 50% is optimal. If it is less than 10%, the texture is hard, and if it exceeds 80%, the form stability is lost, which is not preferable.
【００２７】以上のようにして形成された開孔不織布
は、絡合と開孔による柔軟性保持効果と繊維接着処理に
よる耐摩耗性の向上効果に加えて、接着点を多く持つ層
を片面に偏在させることによって、偏在させない場合の
耐摩耗性と同等の耐摩耗性を両面ともに保ちながら、風
合いをさらに柔軟にする効果を得ることができるため、
ふき取り布、おむつ部材、壁装材、内装材、ガーゼ、水
切りシート及び袋、排水溝ゴミ取りシート、簡易液体フ
ィルター、マスク内ろ材などに好適な開孔不織布を提供
することができる。また、本発明の開孔不織布をふき取
り布に用いると、開孔部分にゴミを補足することがで
き、また開孔不織布とふき取りされる面との間の接触面
積が少なくなるので、摩擦による抵抗が少なくふき取り
易い。このため本発明の開孔不織布は特にふき取り布に
好適である。The non-woven fabric thus formed has a layer having many adhesion points on one side, in addition to an effect of maintaining flexibility by entanglement and opening and an effect of improving abrasion resistance by a fiber bonding treatment. By unevenly distributing, while maintaining the same abrasion resistance on both sides as the abrasion resistance when not unevenly distributed, it is possible to obtain the effect of further softening the texture,
An apertured nonwoven fabric suitable for a wipe cloth, a diaper member, a wall covering material, an interior material, a gauze, a drainer sheet and a bag, a drainage dirt removing sheet, a simple liquid filter, a mask inner filter material, and the like can be provided. Further, when the perforated nonwoven fabric of the present invention is used for a wipe cloth, dust can be trapped in the perforated portion, and the contact area between the perforated nonwoven fabric and the surface to be wiped is reduced, so that resistance due to friction is reduced. Less and easy to wipe off. For this reason, the perforated nonwoven fabric of the present invention is particularly suitable for a wipe cloth.
【００２８】つぎに、実施例及び比較例により本発明を
具体的に説明するが、この実施例は本発明が理解できる
程度に特定の条件を例示して説明するものであって、本
発明はこの実施例に限定されるものではない。尚、実施
例及び比較例の柔軟性、耐摩耗性、引張強度、引張伸度
に関する評価には次の試験方法を使用した。 （剛軟度）得られた不織布より、２０ｍｍＸ２００ｍｍ
の試験片をタテ方向及びヨコ方向にそれぞれ３枚採取
し、ＪＩＳ Ｌ１０９６（一般織物試験方法）の６．１
９．１Ａ法（４５°カンチレバー法）に準じて剛軟度の
測定を行い、タテ方向及びヨコ方向の測定値のそれぞれ
の平均値を求め、これらの平均値をさらに平均して剛軟
度とした。本発明の開孔不織布が目的とする用途に要求
される剛軟度は、好ましくは１００ｍｍ以下であり、さ
らに好ましくは８５ｍｍ以下である。Next, the present invention will be described in detail with reference to Examples and Comparative Examples. However, in these Examples, the present invention is described by exemplifying specific conditions to the extent that the present invention can be understood. It is not limited to this embodiment. The following test methods were used to evaluate the flexibility, abrasion resistance, tensile strength, and tensile elongation of Examples and Comparative Examples. (Rigidity) From the obtained nonwoven fabric, 20mmX200mm
3 test pieces were taken in each of the vertical direction and the horizontal direction, according to JIS L1096 (General Fabric Testing Method), 6.1.
The rigidity is measured in accordance with the 9.1A method (45 ° cantilever method), the average value of the measured values in the vertical direction and the horizontal direction is obtained, and these average values are further averaged to obtain the rigidity. did. The rigidity required for the intended use of the apertured nonwoven fabric of the present invention is preferably 100 mm or less, and more preferably 85 mm or less.
【００２９】（ピリング性）得られた不織布をＪＩＳ
Ｌ１０７６（織物及び編物のピリング試験方法）のＣ法
（アピアランス・リテンション形試験機を用いる方法）
に準じて試験した。試料ホルダの底面積は約２６ｃ
ｍ2、押圧荷重は約６．４０Ｎ（６５０ｇｆ）で１００
回転した後、ピリング判定標準写真４の評価基準である
Ｈ号、Ｍ号、Ｌ号、Ｎ号を準用してピリング性を評価し
た。但し、織物及び編物におけるＨ号の状態は、本発明
のような開孔不織布に関しては得られず、かわりに毛羽
が抜けて毛羽同士が中央で絡まった状態が得られるの
で、この状態をＨ’号として本発明の評価基準に用い
た。すなわち本発明では、Ｈ’級（ピリング性劣る）、
Ｍ級（ピリング性やや劣る）、Ｌ級（ピリング性優れ
る）、Ｎ級（ピリング性特に優れる）の４段階評価とし
た。(Pilling property)
Method C of L1076 (Pilling test method for woven fabric and knitted fabric) (Method using an appearance retention type testing machine)
Tested according to Bottom area of sample holder is about 26c
m 2 , the pressing load is about 6.40 N (650 gf) and 100
After the rotation, the pilling property was evaluated by using the No. H, M, L, and N, which are the evaluation criteria of the pilling judgment standard photograph 4, mutatis mutandis. However, the state of No. H in the woven fabric and the knitted fabric cannot be obtained with the open nonwoven fabric as in the present invention. Instead, a state in which the fluff comes off and the fluff is entangled in the center is obtained. No. was used for the evaluation criteria of the present invention. That is, in the present invention, H ′ class (poor pilling),
The evaluation was made on a four-point scale of M class (the pilling property is slightly inferior), L class (the pilling property is excellent), and N class (the pilling property is particularly excellent).
【００３０】（引張強さ及び伸び率）得られた不織布よ
り２５ＯｍｍＸ５０ｍｍの試験片をタテ方向及びヨコ方
向にそれぞれ３枚採取し、ＪＩＳ Ｌ１０９６（一般織
物試験方法）の６．１２．１Ａ法（ストリップ法）に準
じて引張強さ及び伸び率の測定を行った。試験機には、
定速引張試験機（テンシロンＵＣＴ−５００、オリエン
テックコーポレーション製）を用いて、巾５０ｍｍ、つ
かみ間隔２００ｍｍ、引張速度２００ｍｍ／分で伸長さ
せ、試料が破断するまでに最も大きい荷重とその時の伸
び率を測定し、タテ方向及びヨコ方向について、それぞ
れの平均値を求め、引張強さ及び伸び率とした。(Tensile strength and elongation percentage) From the obtained nonwoven fabric, three test pieces of 250 mm × 50 mm were taken in each of the vertical direction and the horizontal direction, and a 6.12.1A method (strip) according to JIS L1096 (general textile test method). Method)), the tensile strength and elongation were measured. The testing machine has
Using a constant-speed tensile tester (Tensilon UCT-500, manufactured by Orientec Corporation), elongate at a width of 50 mm, a grip interval of 200 mm, and a tensile speed of 200 mm / min. The largest load before the sample breaks and the elongation at that time Was measured, and the average value was determined for each of the vertical direction and the horizontal direction, and the results were defined as the tensile strength and elongation.
【００３１】[0031]
【実施例】（実施例１）乾式法のウエブ形成装置によ
り、繊度２．２デシテックス、繊維長４４ｍｍのポリプ
ロピレン／低融点ポリプロピレンサイドバイサイド型の
接着性繊維である潜在捲縮性複合繊維２０％と繊度１．
７デシテックス、繊維長３８ｍｍのレーヨン繊維８０％
からなる重量３０ｇ／ｍ2のクロスレイされた繊維ウエ
ブＡを作成した。次に、繊度２．２デシテックス、繊維
長４４ｍｍのポリプロピレン／低融点ポリプロピレンサ
イドバイサイド型の接着性繊維である潜在捲縮性複合繊
維５％と繊度１．７デシテックス、繊維長３８ｍｍのレ
ーヨン繊維９５％からなる重量３０ｇ／ｍ2のクロスレ
イされた繊維ウエブＢを作成して、繊維ウエブＡの上に
積層した。この積層した繊維ウエブを８０メッシュ平織
り金網のコンベアーベルトからなる開孔のある支持体上
に載置して、繊維ウエブの上部より、水圧４ＭＰａの高
圧水を、直径０．１３ｍｍのノズル孔が０．６ｍｍ間隔
で直線状に配列されたノズルプレート１本より噴射さ
せ、高速水流となし、繊維ウエブにあて、繊維ウエブに
第一回目の予備的絡合処理を行った。次に、この予備処
理された繊維ウエブを反転させて、第一回目と同じ開孔
のある支持体上に載置して、第一回目の予備処理と同じ
方法で第二回目の予備的絡合処理を行った。次に、繊維
ウエブＡが開孔形成用支持体と接触するように、この予
備処理された繊維ウエブを再び反転させて１０メッシュ
平織り横ナックルタイプの、プラスチックのコンベアー
ベルトからなる開孔形成用支持体上に載置して、繊維ウ
エブの上部より、水圧８ＭＰａの高圧水を、直径０．１
３ｍｍのノズル孔が０．６ｍｍ間隔で直線状に配列され
たノズルプレート２本より噴射させ、高速水流となし、
繊維ウエブにあて、繊維ウエブを絡合処理すると同時に
開孔処理した。次に、この開孔及び、絡合処理した繊維
ウエブを平織り金網からなるコンベアーベルトの上に載
置して、エアースルー型のドライヤーの中で、潜在捲縮
性複合繊維の接着成分である低融点ポリプロピレン樹脂
が溶融するように、１５５°Ｃの温度で、潜在捲縮発現
処理と熱接着処理を行い開孔不織布を得た。この開孔不
織布の重量は５９．７ｇ／ｍ 2であり、厚さは０．８６
ｍｍ、破断時の引張強さは、タテ方向が８０．２Ｎ／５
０ｍｍ巾、ヨコ方向が３１．６Ｎ／５０ｍｍ巾、破断時
の伸び率は、タテ方向が３０．８％、ヨコ方向が５３．
０％、カンチレバー法による剛軟度は６８ｍｍ、ピリン
グテストによる耐摩耗性の度合いは、表（ウエブＡ側の
面であり、接着性繊維の混合比率の多い面）がＬ級、裏
（ウエブＢ側の面であり、接着性繊維の混合比率の少な
い面）がＬ級であった。(Embodiment 1) A dry process web forming apparatus was used.
Polyp with a fineness of 2.2 decitex and a fiber length of 44 mm
Propylene / low melting point polypropylene side-by-side type
20% latent crimpable conjugate fiber and fineness 1.
7% decitex, 38% rayon fiber 80%
Weight of 30g / mTwoCross-laid fiber cloth
A was made. Next, fineness of 2.2 decitex, fiber
44mm long polypropylene / low melting point polypropylene
Latent crimpable composite fiber which is an id-by-side type adhesive fiber
5% fiber, 1.7 dtex, 38 mm fiber length
30g / m weight consisting of 95% fibreonTwoCrossre
Create a fiber web B and place it on fiber web A
Laminated. 80-mesh plain weave of this laminated fiber web
On a support with perforations consisting of wire mesh conveyor belts
And a water pressure of 4 MPa above the fiber web.
Pressurized water with 0.13mm diameter nozzle holes at 0.6mm intervals
From one nozzle plate arranged linearly
High-speed water flow, apply to fiber web, apply to fiber web
The first preliminary entanglement process was performed. Next, this preliminary processing
Turn over the treated fiber web and open the same hole as the first
On the support with
A second preliminary entanglement treatment was performed by the method. Next, the fiber
This preparatory step is performed so that the web A comes into contact with the support for forming holes.
Invert the prepared fiber web again to 10 mesh
Plain weave horizontal knuckle type plastic conveyor
It is placed on a support for forming holes, which consists of a belt.
From the upper part of the eb, high-pressure water with a water pressure of 8 MPa
3mm nozzle holes are arranged linearly at 0.6mm intervals
Sprayed from two nozzle plates, with high-speed water flow,
At the same time as tangling the fiber web against the fiber web
Opening was performed. Next, this hole and the entangled fiber
Place the web on a conveyor belt made of plain weave wire mesh
And put it in a latent crimp in an air-through dryer.
Low melting point polypropylene resin as an adhesive component of conductive composite fiber
At 155 ° C, latent crimps appear so that
Treatment and heat bonding were performed to obtain an apertured nonwoven fabric. This opening
The weight of the woven fabric is 59.7 g / m TwoAnd the thickness is 0.86
mm, the tensile strength at break is 80.2 N / 5 in the vertical direction
0mm width, horizontal direction is 31.6N / 50mm width, at break
The elongation percentage is 30.8% in the vertical direction and 53.% in the horizontal direction.
0%, bending resistance by cantilever method is 68mm, pilin
The table (Web A side
Surface, the surface with a high mixing ratio of adhesive fibers) is L class,
(This is the surface on the web B side, and the mixing ratio of the adhesive fibers is small.
Surface) was L class.
【００３２】（実施例２）実施例１の繊度２．２デシテ
ックス、繊維長４４ｍｍのポリプロピレン／低融点ポリ
プロピレンサイドバイサイド型の接着性繊維である潜在
捲縮性複合繊維のかわりに、繊度１．７デシテックス、
繊維長５１ｍｍのポリプロピレン／ポリエチレンサイド
バイサイド型接着性複合繊維を用いて、接着性複合繊維
の接着成分であるポリエチレン樹脂が溶融するように、
１４０°Ｃの温度で、熱接着処理を行ったこと以外は実
施例１と同様にして、開孔不織布を得た。この開孔不織
布の重量は５９．３ｇ／ｍ2であり、厚さは０．８７ｍ
ｍ、破断時の引張り強さは、タテ方向が７４．９Ｎ／５
０ｍｍ巾、ヨコ方向が２９．７Ｎ／５０ｍｍ巾、破断時
の伸び率は、タテ方向が３０．３％、ヨコ方向が６２．
３％、カンチレバー法による剛軟度は７７ｍｍ、ピリン
グテストによる耐摩耗性の度合いは、表（ウエブＡ側の
面であり、接着性繊維の混合比率の多い面）がＬ級、裏
（ウエブＢ側の面であり、接着性繊維の混合比率の少な
い面）がＬ級であった。(Example 2) Instead of the latently crimpable conjugate fiber which is a polypropylene / low melting point polypropylene side-by-side type adhesive fiber having a fineness of 2.2 decitex and a fiber length of 44 mm of Example 1, a fineness of 1.7 decitex is used. ,
Using a polypropylene / polyethylene side-by-side type adhesive composite fiber having a fiber length of 51 mm, the polyethylene resin as an adhesive component of the adhesive composite fiber is melted,
An apertured nonwoven fabric was obtained in the same manner as in Example 1 except that the thermal bonding treatment was performed at a temperature of 140 ° C. The weight of the perforated nonwoven fabric is 59.3 g / m 2 and the thickness is 0.87 m
m, the tensile strength at break is 74.9 N / 5 in the vertical direction
0 mm width, 29.7 N / 50 mm width in the horizontal direction, and elongation at break was 30.3% in the vertical direction and 62.50 in the horizontal direction.
3%, bending resistance according to the cantilever method is 77 mm, and the degree of abrasion resistance according to the pilling test is L-class in the table (the surface on the side of the web A, where the mixing ratio of the adhesive fiber is large), and back (the web B). The surface on the side where the mixing ratio of the adhesive fibers was low was L-class.
【００３３】（実施例３）実施例１の繊維ウエブＡのか
わりに、繊度２．２デシテックス、繊維長４４ｍｍのポ
リプロピレン／低融点ポリプロピレンサイドバイサイド
型の接着性繊維である潜在捲縮性複合繊維３０％と繊度
１．７デシテックス、繊維長３８ｍｍのレーヨン繊維７
０％からなる重量３０ｇ／ｍ2のクロスレイされた繊維
ウエブＡを作成したこと以外は実施例１と同様にして、
開孔不織布を得た。この開孔不織布の重量は６０．１ｇ
／ｍ2であり、厚さは０．８６ｍｍ、破断時の引張り強
さは、タテ方向が９４．４Ｎ／５０ｍｍ巾、ヨコ方向が
３７．４Ｎ／５０ｍｍ巾、破断時の伸び率は、タテ方向
が４１．５％、ヨコ方向が５９．８％、カンチレバー法
による剛軟度は７７ｍｍ、ピリングテストによる耐摩耗
性の度合いは、表（ウエブＡ側の面であり、接着性繊維
の混合比率の多い面）がＮ級、裏（ウエブＢ側の面であ
り、接着性繊維の混合比率の少ない面）がＬ級であっ
た。Example 3 Instead of the fiber web A of Example 1, 30% of latently crimpable conjugate fiber which is a polypropylene / low melting point polypropylene side-by-side type adhesive fiber having a fineness of 2.2 dtex and a fiber length of 44 mm is used. Rayon fiber 7 with a fineness of 1.7 dtex and a fiber length of 38 mm
A cross-laid fiber web A having a weight of 30 g / m 2 consisting of 0% was prepared in the same manner as in Example 1 except that
An apertured nonwoven fabric was obtained. The weight of this open nonwoven fabric is 60.1 g
/ M 2 , thickness is 0.86 mm, tensile strength at break is 94.4 N / 50 mm width in vertical direction, 37.4 N / 50 mm width in horizontal direction, and elongation at break is vertical direction Is 41.5%, the transverse direction is 59.8%, the bending resistance according to the cantilever method is 77 mm, and the degree of abrasion resistance according to the pilling test is shown in the table (the surface on the side of the web A. The surface (large surface) was N class, and the back surface (surface on the side of the web B, where the mixing ratio of the adhesive fiber was small) was L class.
【００３４】上記の実施例１〜３の結果を表１にまとめ
た。これらの結果から明らかなように、本発明の開孔不
織布は剛軟度の値が小さく風合いが柔軟であり、しかも
両面ともにピリング性がＬ級以上で耐摩耗性に優れ、さ
らに両面同等に耐摩耗性に優れているため、ふき取り
布、おむつ部材、壁装材、内装材、ガーゼ、水切りシー
ト及び袋、排水溝ゴミ取りシート、簡易液体フィルタ
ー、マスク内ろ材などに好適である。The results of Examples 1 to 3 are summarized in Table 1. As is evident from these results, the perforated nonwoven fabric of the present invention has a small value of softness and softness, and has a pilling property of L class or more on both sides, has excellent wear resistance, and has the same resistance to both sides. Since it is excellent in abrasion, it is suitable for a wipe cloth, a diaper member, a wall covering material, an interior material, a gauze, a draining sheet and a bag, a drainage dust removing sheet, a simple liquid filter, a mask inner filter material, and the like.
【００３５】（比較例１）実施例１の繊維ウエブＡのか
わりに、繊度２．２デシテックス、繊維長４４ｍｍのポ
リプロピレン／低融点ポリプロピレンサイドバイサイド
型の接着性繊維である潜在捲縮性複合繊維５％と繊度
１．７デシテックス、繊維長３８ｍｍのレーヨン繊維９
５％からなる重量３０ｇ／ｍ2のクロスレイされた繊維
ウエブＡを作成したこと以外は実施例１と同様にして、
開孔不織布を得た。この開孔不織布の重量は５６．０ｇ
／ｍ2であり、厚さは０．８５ｍｍ、破断時の引張り強
さは、タテ方向が７４．４Ｎ／５０ｍｍ巾、ヨコ方向が
２８．９Ｎ／５０ｍｍ巾、破断時の伸び率は、タテ方向
が３０．８％、ヨコ方向が６０．８％、カンチレバー法
による剛軟度は４３ｍｍ、ピリングテストによる耐摩耗
性の度合いは、表（ウエブＡ側の面）がＨ’級、裏（ウ
エブＢ側の面）がＬ級であった。このように、繊維構造
物全体に占める接着性繊維の重量比率が少なく、しかも
表面層と裏面層の接着性繊維の重量比率の差が５％未満
である比較例１の開孔不織布は、表面の耐摩耗性が劣
り、本発明が目的とする用途には使用できないものであ
った。(Comparative Example 1) Instead of the fiber web A of Example 1, 5% of latently crimpable conjugate fiber which is a polypropylene / low melting point polypropylene side-by-side type adhesive fiber having a fineness of 2.2 dtex and a fiber length of 44 mm And rayon fiber 9 with a fineness of 1.7 dtex and a fiber length of 38 mm
A cross-laid fiber web A having a weight of 30 g / m 2 consisting of 5% was prepared in the same manner as in Example 1, except that
An apertured nonwoven fabric was obtained. The weight of the open nonwoven fabric is 56.0 g.
/ M 2 , thickness is 0.85 mm, tensile strength at break is 74.4 N / 50 mm width in vertical direction, 28.9 N / 50 mm width in horizontal direction, and elongation at break is vertical direction Is 30.8%, the transverse direction is 60.8%, the bending resistance by the cantilever method is 43 mm, and the degree of abrasion resistance by the pilling test is as follows. Side surface) was L class. As described above, the apertured nonwoven fabric of Comparative Example 1 in which the weight ratio of the adhesive fibers to the entire fiber structure is small and the difference in the weight ratio of the adhesive fibers between the front surface layer and the back surface layer is less than 5% is as follows. Was inferior in wear resistance and could not be used for the purpose intended by the present invention.
【００３６】（比較例２）実施例１の繊維ウエブＡのか
わりに、繊度２．２デシテックス、繊維長４４ｍｍのポ
リプロピレン／低融点ポリプロピレンサイドバイサイド
型の接着性繊維である潜在捲縮性複合繊維４０％と繊度
１．７デシテックス、繊維長３８ｍｍのレーヨン繊維６
０％からなる重量３０ｇ／ｍ2のクロスレイされた繊維
ウエブＡを作成したこと、及び繊維ウエブＢのかわり
に、繊度２．２デシテックス、繊維長４４ｍｍのポリプ
ロピレン／低融点ポリプロピレンサイドバイサイド型の
接着性繊維である潜在捲縮性複合繊維４０％と繊度１．
７デシテックス、繊維長３８ｍｍのレーヨン繊維６０％
からなる重量３０ｇ／ｍ2のクロスレイされた繊維ウエ
ブＢを作成したこと以外は実施例１と同様にして、開孔
不織布を得た。この開孔不織布の重量は５８．１ｇ／ｍ
2であり、厚さは０．９０ｍｍ、破断時の引張り強さ
は、タテ方向が１０５．３Ｎ／５０ｍｍ巾、ヨコ方向が
３９．２Ｎ／５０ｍｍ巾、破断時の伸び率は、タテ方向
が４２．０％、ヨコ方向が７１．３％、カンチレバー法
による剛軟度は１２４ｍｍ、ピリングテストによる耐摩
耗性の度合いは、表（ウエブＡ側の面）がＮ級、裏（ウ
エブＢ側の面）がＮ級であった。このように、繊維構造
物全体に占める接着性繊維の重量比率が３０重量％を超
え、しかも表面層と裏面層の接着性繊維の重量比率の差
が５％未満である比較例２の開孔不織布は、両面の耐摩
耗性は優れるものの、剛軟度の値が高く柔軟性に劣るた
め、本発明が目的とする用途には使用できないものであ
った。Comparative Example 2 Instead of the fiber web A of Example 1, 40% of latently crimpable conjugate fiber which is a polypropylene / low melting point polypropylene side-by-side type adhesive fiber having a fineness of 2.2 dtex and a fiber length of 44 mm is used. And rayon fiber 6 with a fineness of 1.7 dtex and a fiber length of 38 mm
A cross-laid fiber web A having a weight of 30 g / m 2 consisting of 0% was prepared, and instead of the fiber web B, a polypropylene / low-melting polypropylene side-by-side type adhesive fiber having a fineness of 2.2 dtex and a fiber length of 44 mm was used. 40% latent crimpable conjugate fiber and fineness 1.
7 decitex, 38% rayon fiber 60%
An open nonwoven fabric was obtained in the same manner as in Example 1 except that a cross-laid fiber web B having a weight of 30 g / m 2 was prepared. The weight of this open nonwoven fabric is 58.1 g / m
2 , the thickness is 0.90 mm, the tensile strength at break is 105.3 N / 50 mm width in the vertical direction, 39.2 N / 50 mm width in the horizontal direction, and the elongation at break is 42 in the vertical direction. 0.0%, horizontal direction: 71.3%, bending resistance by cantilever method: 124 mm, degree of abrasion resistance by pilling test: N-class in table (Web A side), back (Web B side) ) Was N class. As described above, the aperture of Comparative Example 2 in which the weight ratio of the adhesive fibers to the entire fiber structure exceeds 30% by weight, and the difference in the weight ratio of the adhesive fibers between the front surface layer and the back surface layer is less than 5%. Although the nonwoven fabric has excellent abrasion resistance on both sides, it has a high degree of softness and is inferior in flexibility, so that it cannot be used for the purpose intended by the present invention.
【００３７】（比較例３）実施例２の繊維ウエブＡのか
わりに、繊度１．７デシテックス、繊維長５１ｍｍのポ
リプロピレン／ポリエチレンサイドバイサイド型接着性
複合繊維５％と繊度１．７デシテックス、繊維長３８ｍ
ｍのレーヨン繊維９５％からなる重量３０ｇ／ｍ2のク
ロスレイされた繊維ウエブＡを作成したこと以外は実施
例２と同様にして、開孔不織布を得た。この開孔不織布
の重量は６０．３ｇ／ｍ2であり、厚さは０．９３ｍ
ｍ、破断時の引張り強さは、タテ方向が６９．３Ｎ／５
０ｍｍ巾、ヨコ方向が２９．５Ｎ／５０ｍｍ巾、破断時
の伸び率は、タテ方向が２６．３％、ヨコ方向が５７．
３％、カンチレバー法による剛軟度は６１ｍｍ、ピリン
グテストによる耐摩耗性の度合いは、表（ウエブＡ側の
面）がＨ’級、裏（ウエブＢ側の面）がＬ級であった。
このように、繊維構造物全体に占める接着性繊維の重量
比率が少なく、しかも表面層と裏面層の接着性繊維の重
量比率の差が５％未満である比較例３の開孔不織布は、
表面の耐摩耗性が劣り、本発明が目的とする用途には使
用できないものであった。(Comparative Example 3) Instead of the fiber web A of Example 2, 5% of a polypropylene / polyethylene side-by-side type adhesive composite fiber having a fineness of 1.7 dtex and a fiber length of 51 mm and 1.7 dtex and a fiber length of 38 m were used.
An apertured nonwoven fabric was obtained in the same manner as in Example 2 except that a cross-laid fiber web A having a weight of 30 g / m 2 and 95% of m rayon fibers was prepared. The weight of the perforated nonwoven fabric is 60.3 g / m 2 and the thickness is 0.93 m
m, the tensile strength at break is 69.3 N / 5 in the vertical direction
0 mm width, 29.5 N / 50 mm width in the horizontal direction, and the elongation at break is 26.3% in the vertical direction and 57.50 in the horizontal direction.
3%, the bending resistance according to the cantilever method was 61 mm, and the degree of abrasion resistance according to the pilling test was H ′ class on the front side (web A side) and L side on the back side (web B side).
Thus, the apertured nonwoven fabric of Comparative Example 3 in which the weight ratio of the adhesive fibers in the entire fiber structure is small and the difference in the weight ratio of the adhesive fibers in the front layer and the back layer is less than 5% is as follows:
The abrasion resistance of the surface was inferior and could not be used for the purpose intended by the present invention.
【００３８】表１．開孔不織布の評価（実施例１〜３） Table 1. Evaluation of perforated nonwoven fabric (Examples 1-3)
【００３９】表２．開孔不織布の評価（比較例１〜３） Table 2. Evaluation of perforated nonwoven fabric (Comparative Examples 1 to 3)
【００４０】[0040]
【発明の効果】本発明は、接着性繊維５〜３０重量％と
該接着性繊維以外の繊維７０〜９５重量％からなり、繊
維が３次元的に絡合された開孔不織布であって、該開孔
不織布の表面層と裏面層において該接着性繊維の重量比
率が５％以上異なり、かつ該表面層と該裏面層において
該接着性繊維が繊維接着していることを特徴とする開孔
不織布であり、絡合と開孔による柔軟性保持効果と繊維
接着処理による耐摩耗性の向上効果に加えて、接着点を
多く持つ層を片面に偏在させることによって、偏在させ
ない場合の耐摩耗性と同等の耐摩耗性を両面ともに保ち
ながら、風合いをさらに柔軟にする効果を得ることがで
きるため、ふき取り布、おむつ部材、壁装材、内装材、
ガーゼ、水切りシート及び袋、排水溝ゴミ取りシート、
簡易液体フィルター、マスク内ろ材などに好適な開孔不
織布を提供することができる。また、本発明の開孔不織
布をふき取り布に用いると、開孔部分にゴミを補足する
ことができ、また開孔不織布とふき取りされる面との間
の接触面積が少なくなるので、摩擦による抵抗が少なく
ふき取り易い。このため本発明の開孔不織布は特にふき
取り布に好適である。According to the present invention, there is provided an open nonwoven fabric comprising 5 to 30% by weight of an adhesive fiber and 70 to 95% by weight of a fiber other than the adhesive fiber, wherein the fiber is three-dimensionally entangled, The aperture characterized in that the weight ratio of the adhesive fibers in the surface layer and the back layer of the apertured nonwoven fabric is different by 5% or more, and the adhesive fibers are fiber-bonded in the surface layer and the back layer. It is a non-woven fabric. In addition to the effect of maintaining flexibility by entanglement and opening, and the effect of improving wear resistance by fiber bonding treatment, the layer with many adhesion points is unevenly distributed on one side, so that the wear resistance when not unevenly distributed To maintain the same abrasion resistance on both sides and achieve the effect of softening the texture, wipe cloth, diaper members, wall materials, interior materials,
Gauze, drainer sheet and bag, drainage dirt removal sheet,
An apertured nonwoven fabric suitable for a simple liquid filter, a filter for a mask, and the like can be provided. Further, when the perforated nonwoven fabric of the present invention is used for a wipe cloth, dust can be trapped in the perforated portion, and the contact area between the perforated nonwoven fabric and the surface to be wiped is reduced, so that resistance due to friction is reduced. Less and easy to wipe off. For this reason, the perforated nonwoven fabric of the present invention is particularly suitable for a wipe cloth.
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｄ０４Ｈ 1/46 Ｄ０４Ｈ 1/46 Ａ 1/54 1/54 Ｂ Ｆターム(参考） 3B074 AA02 AA08 AB01 AC03 BB04 4D019 AA01 AA03 BA13 BB03 CB06 4L047 AA14 AA27 AA28 AB02 BA04 BA05 BA09 BB02 BB09 CA02 CA10 CA15 CC03 CC04 CC10 CC12 CC16 DA00 Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat II (reference) D04H 1/46 D04H 1/46 A 1/54 1/54 B F term (reference) 3B074 AA02 AA08 AB01 AC03 BB04 4D019 AA01 AA03 BA13 BB03 CB06 4L047 AA14 AA27 AA28 AB02 BA04 BA05 BA09 BB02 BB09 CA02 CA10 CA15 CC03 CC04 CC10 CC12 CC16 DA00
Claims (6)
維以外の繊維７０〜９５重量％からなり、繊維が３次元
的に絡合された開孔不織布であって、該開孔不織布の表
面層と裏面層において該接着性繊維の重量比率が５％以
上異なり、かつ該表面層と該裏面層において該接着性繊
維が繊維接着していることを特徴とする開孔不織布。1. An open nonwoven fabric comprising 5 to 30% by weight of an adhesive fiber and 70 to 95% by weight of a fiber other than the adhesive fiber, wherein the fibers are three-dimensionally entangled. Wherein the weight ratio of the adhesive fibers is different by 5% or more between the surface layer and the back surface layer, and the adhesive fibers are fiber-bonded between the surface layer and the back surface layer.
繊維以外の繊維が８０〜９５重量％からなることを特徴
とする請求項１に記載の開孔不織布。2. The perforated nonwoven fabric according to claim 1, wherein the adhesive fiber comprises 5 to 20% by weight and the fiber other than the adhesive fiber comprises 80 to 95% by weight.
を特徴とする請求項１または２に記載の開孔不織布。3. The nonwoven fabric according to claim 1, wherein the adhesive fiber is a latently crimpable fiber.
特徴とする請求項１〜３のいずれかに記載の開孔不織
布。4. The perforated nonwoven fabric according to claim 1, wherein the nonwoven fabric contains 30% by weight or more of hydrophilic fibers.
項１〜４のいずれかに記載の開孔不織布。5. The nonwoven fabric according to claim 1, wherein the entanglement is performed by a hydroentanglement method.
らなる繊維ウエブＡと、繊維ウエブＡよりも接着性繊維
の重量比率が５％以上少ない繊維ウエブＢとを形成する
に際して、繊維ウエブＡと繊維ウエブＢとに含まれる合
計の繊維に対して、該接着性繊維が５〜３０重量％及び
該接着性繊維以外の繊維が７０〜９５重量％となるよう
に形成した後、繊維ウエブＡが最下層に、繊維ウエブＢ
が最上層になるように、開孔形成用支持体の上に繊維ウ
エブを積層載置した後、積層した繊維ウエブに水流処理
により積層した繊維ウエブを絡合及び開孔させた後、該
接着性繊維の繊維接着処理を行う開孔不織布の製造方
法。6. When forming a fiber web A comprising an adhesive fiber and a fiber other than the adhesive fiber, and a fiber web B in which the weight ratio of the adhesive fiber is 5% or less than that of the fiber web A, A and the fiber web are formed such that the adhesive fiber is 5 to 30% by weight and the fiber other than the adhesive fiber is 70 to 95% by weight based on the total fiber contained in the fiber web A and the fiber web B. A is the bottom layer, fiber web B
After the fiber webs are stacked and placed on the opening forming support so that the uppermost layer becomes the uppermost layer, the fiber webs laminated by the water flow treatment are entangled and perforated on the laminated fiber webs, and then the bonding is performed. A method for producing a perforated nonwoven fabric for performing a fiber bonding treatment of conductive fibers.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000295560A JP4446579B2 (en) | 2000-09-28 | 2000-09-28 | Perforated nonwoven fabric and method for producing the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000295560A JP4446579B2 (en) | 2000-09-28 | 2000-09-28 | Perforated nonwoven fabric and method for producing the same |
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| Publication Number | Publication Date |
|---|---|
| JP2002105826A true JP2002105826A (en) | 2002-04-10 |
| JP4446579B2 JP4446579B2 (en) | 2010-04-07 |
Family
ID=18777969
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000295560A Expired - Fee Related JP4446579B2 (en) | 2000-09-28 | 2000-09-28 | Perforated nonwoven fabric and method for producing the same |
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