JP2003183968A - Uneven nonwoven fabric with little thickness change and method for producing the same - Google Patents
Uneven nonwoven fabric with little thickness change and method for producing the sameInfo
- Publication number
- JP2003183968A JP2003183968A JP2001377361A JP2001377361A JP2003183968A JP 2003183968 A JP2003183968 A JP 2003183968A JP 2001377361 A JP2001377361 A JP 2001377361A JP 2001377361 A JP2001377361 A JP 2001377361A JP 2003183968 A JP2003183968 A JP 2003183968A
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- Japan
- Prior art keywords
- nonwoven fabric
- thickness
- convex
- cotton fibers
- uneven
- 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.)
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Links
Landscapes
- Nonwoven Fabrics (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、使用時において厚
み変化の少ない凹凸不織布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 concavo-convex nonwoven fabric having a small thickness change during use and a method for producing the same.
【０００２】[0002]
【従来の技術】従来より、表面が凹凸状態となった凹凸
不織布は、乾燥したまま又は水分等で湿潤させて、各種
拭き布として好適に使用されている。これは、表面が凹
凸状態となっているため、机，自動車，人体等の被清掃
物の表面に存在する塵埃等を良好に掻き取ることができ
るからである。2. Description of the Related Art Conventionally, an uneven nonwoven fabric having an uneven surface has been suitably used as various wiping cloths after being dried or moistened with water. This is because the surface is uneven so that dust and the like existing on the surface of the object to be cleaned such as a desk, an automobile, and a human body can be scraped off well.
【０００３】このような凹凸不織布として、例えば、ク
レープ不織布（ちりめん状不織布）やエンボス不織布等
が知られている。クレープ不織布は、潜在捲縮性繊維と
非潜在捲縮性繊維とを混合した繊維ウェブを準備し、こ
の繊維ウェブ中の潜在捲縮性繊維のみを捲縮させ、非潜
在捲縮性繊維を弛ませて、この弛みによって表面に凹凸
状態を発現させたものである。しかし、このような弛み
は、クレープ不織布の厚み方向に若干の圧力が負荷され
ると、直ちに変形し、表面の凹凸状態は消失してしまう
ものであった。また、エンボス不織布は、表面平滑な不
織布を部分的に圧縮し、圧縮部を凹部とし非圧縮部を凸
部とするものである。従って、この場合も、厚み方向に
圧力を負荷すると、非圧縮部が容易に圧縮され、表面の
凹凸状態は消失してしまう。このように、圧力を負荷す
ると凹凸状態が消失してしまうものは、拭き布としての
性能が不十分である。何故なら、拭き布として使用する
ときには、一般的に厚み方向に圧力が負荷され、凹凸状
態が少なからず消失し、凹凸による塵埃等の除去性能が
低下する恐れがあるからである。As such a textured nonwoven fabric, for example, a crepe nonwoven fabric (crepe-shaped nonwoven fabric), an embossed nonwoven fabric, etc. are known. For the crepe nonwoven fabric, prepare a fiber web in which latent crimpable fibers and non-latent crimpable fibers are mixed, crimp only the latent crimpable fibers in the fibrous web, and relax the non-latent crimpable fibers. In fact, this slack causes the surface to have an uneven surface. However, such slack was immediately deformed when a slight pressure was applied in the thickness direction of the crepe nonwoven fabric, and the unevenness of the surface disappeared. In addition, the embossed non-woven fabric is obtained by partially compressing a non-woven fabric having a smooth surface so that the compressed portion becomes a concave portion and the non-compressed portion becomes a convex portion. Therefore, also in this case, when pressure is applied in the thickness direction, the non-compressed portion is easily compressed, and the unevenness of the surface disappears. In this way, when the unevenness disappears when pressure is applied, the performance as a wiping cloth is insufficient. This is because, when it is used as a wiping cloth, pressure is generally applied in the thickness direction, and the unevenness is considerably lost, and the performance of removing dust and the like due to the unevenness may deteriorate.
【０００４】また、多数の開孔部を具備した開孔不織布
も、開孔部が凹部となり非開孔部が凸部となるため、拭
き布として好適に使用されている。このような開孔不織
布は、合成繊維よりなる繊維ウェブを孔開き支持体に坦
持して、繊維ウェブ側から水流を施し、孔開き支持体の
孔部に合成繊維を集めて、非孔部に対応する箇所に開孔
部を設けてなるものである。また、繊維ウェブを二枚の
孔開き支持体に挟んで、開口部から水流を施して、非孔
部に合成繊維を集めて、孔部に対応する箇所に開孔部を
設けてなるものである。しかしながら、この場合には、
非開孔部（凸部）に合成繊維が集まり、比較的嵩高とな
っているため、開孔不織布の厚み方向に圧力を負荷する
と、容易に凸部の厚みが薄くなるということがあった。
従って、拭き布として使用する際、厚みが薄くなりやす
く、使用しにくいという欠点があった。Further, an open-pore nonwoven fabric having a large number of open pores is also suitably used as a wiping cloth since the open pores are concave and the non-open pores are convex. Such a perforated nonwoven fabric carries a fibrous web of synthetic fibers on a perforated support, applies a water stream from the side of the fibrous web, and collects synthetic fibers in the perforated support to form non-perforated parts. An opening is provided at a location corresponding to. Further, the fibrous web is sandwiched between two perforated supports, a water flow is applied from the opening, the synthetic fibers are collected in the non-perforated part, and the perforated part is provided at a position corresponding to the perforated part. is there. However, in this case,
Since synthetic fibers are gathered in the non-opened portions (convex portions) and are relatively bulky, when the pressure is applied in the thickness direction of the opened non-woven fabric, the thickness of the convex portions may be easily reduced.
Therefore, when it is used as a wiping cloth, the thickness tends to be thin and it is difficult to use.
【０００５】[0005]
【発明が解決しようとする課題】そこで、本件発明者等
は、不織布の厚み方向に圧力を負荷しても、凸部の厚み
（即ち、不織布の厚み）が薄くなりにくいものを得るこ
とを課題として、種々研究を行った。その結果、予期せ
ぬことに、高圧水流を用いて綿繊維相互を緊密に交絡さ
せて形成させた凸部を持つ不織布は、厚み方向に圧力を
負荷しても、その厚みが減少しにくいことが判明した。
本発明は、このような知見に基づくものである。Therefore, the inventors of the present invention intend to obtain a nonwoven fabric in which the thickness of the convex portion (that is, the thickness of the nonwoven fabric) is not easily thinned even when pressure is applied in the thickness direction of the nonwoven fabric. As a result, various studies were conducted. As a result, unexpectedly, a non-woven fabric having a convex portion formed by tightly entangled cotton fibers with each other using a high-pressure water flow does not easily reduce its thickness even when pressure is applied in the thickness direction. There was found.
The present invention is based on such knowledge.
【０００６】[0006]
【課題を解決するための手段】即ち、本発明は、綿繊維
を主体として構成された凹凸不織布であって、多数の凸
部と、該凸部間を繋ぐ凹部とを具備し、該凸部は高圧水
流の作用によって綿繊維相互間が緊密に交絡されて形成
されており、一方、該凹部は隣接する該凸部間を繋ぐ綿
繊維で形成されていることを特徴とする厚み変化の少な
い凹凸不織布及びその製造方法に関するものである。That is, the present invention is a concavo-convex nonwoven fabric composed mainly of cotton fibers, comprising a large number of convex portions and concave portions connecting the convex portions, and the convex portions. Is formed by intimately entangled cotton fibers with each other by the action of a high-pressure water flow, while the recesses are formed by cotton fibers connecting between the adjacent projections, and the change in thickness is small. The present invention relates to a textured nonwoven fabric and a method for manufacturing the same.
【０００７】本発明に係る凹凸不織布は、綿繊維を主体
として構成されたものである。綿繊維はコットン繊維と
も呼ばれる天然繊維であって、その横断面は扁平で複雑
な形状をした異形断面を持ち、しかも押し潰された状態
の中空を持つ繊維である。また、綿繊維は平均繊度が１
〜５デシテックス程度で、平均繊維長が１５〜５０ｍｍ
程度のものである。本発明に係る凹凸不織布は、このよ
うな綿繊維１００％で構成されていても良いし、綿繊維
の他に他種繊維が混入していても良い。他種繊維として
は、綿繊維の緊密な交絡によって形成される凸部に、圧
力の負荷による厚み変化を与えにくいものが好ましく、
比較的繊度の小さい合成繊維を用いるのが好ましい。例
えば、繊度０．１〜０．５デシテックス程度の極細繊維
が好ましい。極細繊維としては、一般的には分割型合成
繊維を分割して得られるものが用いられる。なお、繊度
が大きい合成繊維を用いると、凸部の厚み変化が大きく
なる傾向が生じる。The concavo-convex nonwoven fabric according to the present invention is mainly composed of cotton fibers. Cotton fiber is a natural fiber also called cotton fiber, and its cross section is a fiber having a flat and complex-shaped irregular cross section and having a hollow in a crushed state. Also, cotton fibers have an average fineness of 1
~ 5 decitex, average fiber length 15 ~ 50mm
It is of a degree. The concavo-convex nonwoven fabric according to the present invention may be composed of 100% of such cotton fibers, or may be mixed with other kinds of fibers in addition to the cotton fibers. As the other type of fiber, a convex portion formed by the tight entanglement of cotton fibers is preferably one that is unlikely to give a thickness change due to pressure load,
It is preferable to use synthetic fibers having a relatively small fineness. For example, ultrafine fibers having a fineness of about 0.1 to 0.5 decitex are preferable. As the ultrafine fibers, those obtained by dividing split type synthetic fibers are generally used. In addition, when synthetic fibers having a large fineness are used, the change in the thickness of the convex portion tends to increase.
【０００８】本発明に係る凹凸不織布は、多数の凸部
と、各凸部間を繋ぐ凹部とを具備するものである。凸部
は、高圧水流の作用によって、綿繊維相互間が緊密に交
絡されて形成されているものである。高圧水流は、水を
噴射孔から高圧力で噴射して得られるものである。具体
的には、孔径０．０５〜２．０ｍｍの噴射孔が、噴射孔
間隔０．０５〜１０ｍｍで一列又は複数列配置されてい
る噴射装置を用い、水を噴射孔から１．９〜３９．２Ｍ
Ｐａの圧力で噴射して得られるものである。このような
高圧水流は大きな運動エネルギーを持っており、これを
綿繊維群に衝突させると、綿繊維群の運動エネルギーに
転換され、綿繊維同士が緊密に交絡するのである。高圧
水流によって綿繊維相互間を緊密に交絡させた凸部は、
綿繊維相互間に形成される空隙が少なく、圧力を負荷し
ても厚み変化の少ないものである。この理由は、定かで
はないが、綿繊維が扁平な異形断面を持ち且つ押し潰さ
れた中空を持っていること、綿繊維が親水性に優れてい
ることからと考えられる。凸部の形状は任意でよく、例
えば、正方形、長方形、円形、楕円形、菱形、線状、畝
状等であってよい。The concavo-convex nonwoven fabric according to the present invention has a large number of convex portions and concave portions connecting the convex portions. The convex portion is formed by intertwining the cotton fibers with each other by the action of the high-pressure water flow. The high-pressure water stream is obtained by injecting water from an injection hole at high pressure. Specifically, water is injected from the injection holes 1.9 to 39 by using an injection device in which injection holes having a hole diameter of 0.05 to 2.0 mm are arranged in one row or a plurality of rows with an injection hole interval of 0.05 to 10 mm. .2M
It is obtained by jetting at a pressure of Pa. Such a high-pressure water stream has a large kinetic energy, and when it collides with the cotton fiber group, it is converted into the kinetic energy of the cotton fiber group, and the cotton fibers are intimately entangled with each other. The convex parts that tightly entangled the cotton fibers with each other by the high pressure water flow,
There are few voids formed between cotton fibers, and the thickness does not change much even when pressure is applied. The reason for this is not clear, but it is considered that the cotton fiber has a flat irregular cross section and has a crushed hollow, and the cotton fiber is excellent in hydrophilicity. The shape of the protrusion may be arbitrary, and may be, for example, a square, a rectangle, a circle, an ellipse, a rhombus, a line, a ridge, or the like.
【０００９】多数の凸部における各凸部間は、凹部によ
って繋がれている。凹部は、隣接する凸部間を繋ぐ綿繊
維で形成されている。つまり、一本の綿繊維は、複数個
の凸部に跨がって存在しており、結果的に、凸部間がこ
の綿繊維で繋がれた状態となっている。凹部における綿
繊維も、その相互間は一般的に交絡されている。また、
凹部は、凸部に比べて、単位面積当たりの綿繊維の量が
少なくなっている。なお、凹部の一部には、綿繊維の存
在しない開孔部があっても良い。開孔部があると、拭き
取った塵埃等を、この開孔部を通して除去しやすくなる
ので、好ましいものである。The convex portions of the large number of convex portions are connected by concave portions. The concave portion is formed of a cotton fiber that connects adjacent convex portions. That is, one cotton fiber exists over a plurality of convex portions, and as a result, the convex portions are connected by the cotton fiber. The cotton fibers in the depressions are also generally entangled with each other. Also,
The concave portion has a smaller amount of cotton fiber per unit area than the convex portion. It should be noted that some of the recesses may have an opening in which no cotton fiber exists. The presence of the opening is preferable because it makes it easier to remove dust and the like wiped off through the opening.
【００１０】凸部の大きさ（面積）は任意であるが、例
えば、単位平方センチメートル当たり、数個から数百個
の凸部が存在する程度が良く、特に３〜２５個の凸部が
存在する程度が最も良い。具体的には、一個一個の凸部
の面積が０．５〜６ｍｍ2であるのが好ましい。一個の
凸部の面積が０．５ｍｍ2未満であると、隣接する凸部
間の間隔が狭い場合、表面が平滑な状態となり、塵埃等
の拭き取り性が低下する傾向が生じる。一方、隣接する
凸部間の間隔が広い場合、凸部が有効に働かず、塵埃等
の拭き取り性が低下する傾向が生じる。また、一個の凸
部の面積が６ｍｍ2を超えると、凹部が少なくなって凹
凸状態が低下し、塵埃等の拭き取り性が低下する傾向が
生じる。The size (area) of the convex portion is arbitrary, but for example, it is good that there are several to several hundred convex portions per unit square centimeter, and in particular, there are 3 to 25 convex portions. The degree is the best. Specifically, the area of each convex portion is preferably 0.5 to 6 mm 2 . If the area of one convex portion is less than 0.5 mm 2 , the surface becomes smooth when the space between the adjacent convex portions is narrow, and the wiping-off property for dust and the like tends to decrease. On the other hand, when the interval between the adjacent convex portions is large, the convex portions do not work effectively, and the wiping-off property for dust and the like tends to be deteriorated. Further, when the area of one convex portion exceeds 6 mm 2 , the number of concave portions is reduced, the unevenness is deteriorated, and the wiping-off property for dust or the like tends to be deteriorated.
【００１１】凸部の高さ、即ち、凹凸不織布の厚み（凸
部の高さによって、凹凸不織布の厚みが決定される。）
は任意であるが、一般的には８０〜２００μｍ（圧力
０．２９４ｋＰａ印加時の厚み）程度が好ましい。厚み
が８０μｍ未満であると、もととも厚みが薄いため、表
面の凹凸状態が不十分となる傾向が生じる。また、厚み
が２００μｍを超えると、もともと厚みが厚すぎて、厚
み変化が大きくなる傾向が生じる。本発明においては、
圧力負荷による厚み変化は以下のとおりであるのが好ま
しい。まず、圧力０．２９４ｋＰａ（３ｇｆ／ｃｍ2）
印加時における凹凸不織布の厚みをＸ（μｍ）とする。
一方、圧力１．９６０ｋＰａ（２０ｇｆ／ｃｍ2）印加
時における凹凸不織布の厚みをＹ（μｍ）とする。そし
て、〔（Ｙ×１００）／Ｘ〕なる式で算出した値（厚み
保持率ともいう。）が７５（％）以上であるのが好まし
い。つまり、一般的なクレープ不織布やエンボス不織布
は、低圧力で測定した厚みと高圧力で測定した厚みとの
変化が大きくなるのであるが、本発明に係る凹凸不織布
は、その変化が小さく、好ましくは厚み保持率が７５
（％）以上となるのである。これは、本発明に係る凹凸
不織布が、綿繊維を採用し、この綿繊維を高圧水流によ
って緊密に交絡させて凸部を形成したため、この凸部の
厚みが圧力によって変化しにくいためである。なお、厚
みの測定は、厚み測定器（株式会社大栄科学精機製作所
製）を用いて、所定の圧力を印加して行われる。The height of the convex portion, that is, the thickness of the uneven nonwoven fabric (the thickness of the uneven nonwoven fabric is determined by the height of the convex portion).
Is optional, but is generally preferably about 80 to 200 μm (thickness when a pressure of 0.294 kPa is applied). If the thickness is less than 80 μm, the thickness is originally thin, and the unevenness of the surface tends to be insufficient. On the other hand, if the thickness exceeds 200 μm, the thickness is originally too thick, and the change in thickness tends to be large. In the present invention,
The thickness change due to the pressure load is preferably as follows. First, the pressure is 0.294 kPa (3 gf / cm 2 ).
The thickness of the concavo-convex nonwoven fabric at the time of application is X (μm).
On the other hand, the thickness of the concavo-convex nonwoven fabric when a pressure of 1.960 kPa (20 gf / cm 2 ) is applied is Y (μm). The value (also referred to as the thickness retention rate) calculated by the formula [(Y × 100) / X] is preferably 75 (%) or more. That is, a general crepe nonwoven fabric or embossed nonwoven fabric has a large change between the thickness measured at low pressure and the thickness measured at high pressure, but the uneven nonwoven fabric according to the present invention has a small change, preferably Thickness retention rate is 75
(%) Or more. This is because the concavo-convex nonwoven fabric according to the present invention employs cotton fibers, and the cotton fibers are intimately entangled with each other by a high-pressure water flow to form convex portions, so that the thickness of the convex portions is unlikely to change due to pressure. The thickness is measured using a thickness measuring device (manufactured by Daiei Kagaku Seiki Co., Ltd.) by applying a predetermined pressure.
【００１２】本発明に係る凹凸不織布は、例えば、以下
の方法で得ることができる。まず、綿繊維が集積されて
なる綿繊維ウェブを準備する。そして、綿繊維ウェブを
孔開き支持体に坦持する。孔開き支持体としては任意の
ものを採用しうるが、例えば、所定の目開きを持った粗
目織物等を用いる。この後、綿繊維ウェブ側から高圧水
流を施す。この高圧水流は、孔径０．０５〜２．０ｍｍ
の噴射孔が、噴射孔間隔０．０５〜１０ｍｍで一列又は
複数列配置されている噴射装置を用い、水を噴射孔から
１．９〜３９．２ＭＰａの圧力で噴射して得られるもの
である。そうすると、高圧水流は綿繊維ウェブに衝突し
て、綿繊維に運動エネルギーを与える。この運動エネル
ギーにより、綿繊維は、相互に交絡しながら、孔開き支
持体の孔方向へ移動する。この結果、孔開き支持体の孔
部に対応した綿繊維ウェブの箇所が凸部となり、孔の開
いていない非孔部に対応した綿繊維ウェブの箇所が凹部
となった凹凸不織布が得られる。The uneven nonwoven fabric according to the present invention can be obtained, for example, by the following method. First, a cotton fiber web in which cotton fibers are accumulated is prepared. The cotton fiber web is then carried on a perforated support. As the perforated support, any support can be adopted, but for example, a coarse woven fabric having a predetermined opening is used. After this, a high-pressure water stream is applied from the cotton fiber web side. This high pressure water flow has a pore diameter of 0.05 to 2.0 mm.
Is obtained by injecting water from the injection holes at a pressure of 1.9 to 39.2 MPa using an injection device in which the injection holes are arranged in one or more rows with an injection hole interval of 0.05 to 10 mm. . The high pressure water stream then impinges on the cotton fiber web and imparts kinetic energy to the cotton fibers. This kinetic energy causes the cotton fibers to move in the direction of the holes of the perforated support while being entangled with each other. As a result, a concavo-convex nonwoven fabric is obtained in which the portions of the cotton fiber web corresponding to the holes of the perforated support become convex portions, and the portions of the cotton fiber web corresponding to the non-perforated non-perforated portions become concave portions.
【００１３】孔開き支持体の孔部の大きさは、得ようと
する凹凸不織布の凸部の大きさに基づいて決定すること
ができる。例えば、粗目織物を使用した場合には、一般
的に、粗目織物の目開き（孔部）が６〜２０メッシュ程
度のものを用いる。目開きが６メッシュ未満であると、
孔部が大きすぎて、高圧水流を施したとき、綿繊維が孔
部から流出してしまい、凸部が形成されにくくなる。ま
た、目開きが２０メッシュを超えると、孔部同士の間隔
が狭すぎて、孔開き支持体の孔部に綿繊維が移動しにく
くなり、凸部が得られにくくなる。なお、メッシュと
は、１インチ当たりの線の数を指し、例えば６メッシュ
の粗目織物は、１インチ当たり６本の線が存在するもの
を指す。The size of the pores of the perforated support can be determined based on the size of the projections of the uneven nonwoven fabric to be obtained. For example, when a coarse woven fabric is used, a coarse woven fabric having openings (holes) of about 6 to 20 mesh is generally used. If the opening is less than 6 mesh,
When the high-pressure water stream is applied because the pores are too large, the cotton fibers flow out from the pores, making it difficult to form the protrusions. When the mesh size is more than 20 mesh, the distance between the holes is too narrow, and the cotton fibers are less likely to move into the holes of the hole supporting body, so that the convex portions are hard to be obtained. The mesh refers to the number of lines per inch. For example, a 6-mesh coarse woven fabric has 6 lines per inch.
【００１４】本発明に係る凹凸不織布の目付は、３０〜
２００ｇ／ｍ2程度であるのが好ましい。目付が３０ｇ
／ｍ2未満であると、凹凸不織布の厚みが相対的に薄く
なり、表面の凹凸状態が不十分となる傾向が生じる。ま
た、目付が２００ｇ／ｍ2を超えると、凹凸不織布が相
対的に厚くなりすぎて、厚み保持率の高いものを得られ
にくくなる。本発明に係る凹凸不織布は、従来公知の用
途に用いることができ、例えば各種拭き布として好適に
用いられる。また、拭き布の他に、テーブルクロス、シ
ーツ、使い捨て衣料等にも好適に用いることができる。
なお、拭き布として使用する場合には、乾燥状態でその
まま使用しても良いし、水分やワックス等が含浸させた
状態で使用しても良い。The concavo-convex nonwoven fabric according to the present invention has a basis weight of 30 to
It is preferably about 200 g / m 2 . Weight is 30g
If it is less than / m 2 , the thickness of the uneven nonwoven fabric tends to be relatively thin, and the unevenness of the surface tends to be insufficient. Further, when the basis weight exceeds 200 g / m 2 , the uneven nonwoven fabric becomes relatively thick, and it becomes difficult to obtain a product having a high thickness retention rate. The concavo-convex nonwoven fabric according to the present invention can be used for conventionally known applications, and is suitably used as, for example, various wiping cloths. Further, in addition to the wiping cloth, it can be suitably used for table cloths, sheets, disposable clothing and the like.
When used as a wiping cloth, it may be used as it is in a dry state or may be used in a state of being impregnated with water, wax or the like.
【００１５】[0015]
【実施例】以下、実施例によって本発明を説明するが、
本発明は実施例に限定されるものではない。本発明は、
高圧水流を用いて綿繊維相互を緊密に交絡させて形成さ
せた凸部を持つ不織布は、その厚みが圧力負荷によって
変化しにくいとの知見に基づくものとして解釈されるべ
きである。EXAMPLES The present invention will be described below with reference to examples.
The invention is not limited to the examples. The present invention is
A nonwoven fabric having a convex portion formed by tightly entangled cotton fibers with each other using a high-pressure water stream should be construed as based on the finding that its thickness is unlikely to change due to pressure load.
【００１６】実施例１
平均繊度１．６５デシテックス、平均繊維長２５ｍｍの
綿繊維を用いて、ランダムカード機にて、目付５０ｇ／
ｍ2の綿繊維ウェブを準備した。この綿繊維ウェブを、
目開き８メッシュの金属製メッシュスクリーン〔金属線
を用い、平織組織にて製織されたメッシュ織物（粗目織
物）〕上に坦持し、綿繊維ウェブ側から高圧水流を施し
た。高圧水流は、孔径０．１ｍｍの噴射孔が孔間隔０．
６ｍｍで一列配置され、かつ、その列を三列備えた噴射
装置を用い、綿繊維ウェブの上方（即ち、金属製メッシ
ュスクリーンの位置する反対側上方）３０ｍｍの位置か
ら９．８ＭＰａの圧力で水を噴射させて得られたもので
ある。綿繊維ウェブに、この高圧水流を施すことによ
り、綿繊維は金属製メッシュスクリーンの孔部に移動し
ながら、相互に交絡し、孔部に対応する凸部と、非孔部
に対応する凹部を持つ凹凸不織布が得られた。そして、
この凹凸不織布から過剰水分を除去し、乾燥した。Example 1 Using a cotton fiber having an average fineness of 1.65 decitex and an average fiber length of 25 mm, a basis weight of 50 g / in a random card machine.
An m 2 cotton fiber web was prepared. This cotton fiber web,
It was carried on a metal mesh screen having a mesh size of 8 mesh [mesh fabric woven with a plain weave structure using a metal wire (coarse fabric)] and subjected to high-pressure water flow from the cotton fiber web side. In the high-pressure water stream, the injection holes with a hole diameter of 0.1 mm have a hole interval of 0.
Using a jetting device arranged in a row of 6 mm and provided with three rows, the water was applied at a pressure of 9.8 MPa from a position 30 mm above the cotton fiber web (that is, above the metal mesh screen). Is obtained by injecting. By applying this high-pressure water flow to the cotton fiber web, the cotton fibers move to the holes of the metal mesh screen and are entangled with each other, forming convex portions corresponding to the hole portions and concave portions corresponding to the non-hole portions. A textured non-woven fabric was obtained. And
Excessive water was removed from this textured nonwoven fabric and dried.
【００１７】実施例２
目開き８メッシュの金属製メッシュスクリーンに代え
て、目開き６メッシュの金属製メッシュスクリーンを使
用する他は、実施例１と同一の方法で凹凸不織布を得
た。Example 2 A concavo-convex nonwoven fabric was obtained in the same manner as in Example 1 except that a metal mesh screen having 6 mesh openings was used instead of the metal mesh screen having 8 mesh openings.
【００１８】実施例３
目開き８メッシュの金属製メッシュスクリーンに代え
て、目開き１０メッシュの金属製メッシュスクリーンを
使用する他は、実施例１と同一の方法で凹凸不織布を得
た。Example 3 A concavo-convex nonwoven fabric was obtained in the same manner as in Example 1 except that a metal mesh screen having 10 mesh openings was used instead of the metal mesh screen having 8 mesh openings.
【００１９】実施例４
目開き８メッシュの金属製メッシュスクリーンに代え
て、目開き１６メッシュの金属製メッシュスクリーンを
使用する他は、実施例１と同一の方法で凹凸不織布を得
た。Example 4 A concavo-convex nonwoven fabric was obtained in the same manner as in Example 1 except that a metal mesh screen having openings of 16 mesh was used instead of the metal mesh screen having openings of 8 mesh.
【００２０】実施例５
綿繊維ウェブの目付を８０ｇ／ｍ2とした他は、実施例
１と同一の方法で凹凸不織布を得た。Example 5 An uneven nonwoven fabric was obtained in the same manner as in Example 1 except that the basis weight of the cotton fiber web was set to 80 g / m 2 .
【００２１】実施例６
綿繊維ウェブの目付を１２０ｇ／ｍ2とした他は、実施
例１と同一の方法で凹凸不織布を得た。Example 6 An uneven nonwoven fabric was obtained in the same manner as in Example 1 except that the basis weight of the cotton fiber web was 120 g / m 2 .
【００２２】実施例７
高圧水流の圧力を６．８６ＭＰａとした他は、実施例１
と同一の方法で凹凸不織布を得た。Example 7 Example 1 was repeated except that the pressure of the high-pressure water stream was 6.86 MPa.
An uneven nonwoven fabric was obtained by the same method as described above.
【００２３】実施例８
高圧水流の圧力を１４．７ＭＰａとした他は、実施例１
と同一の方法で凹凸不織布を得た。Example 8 Example 1 was repeated except that the pressure of the high-pressure water stream was set to 14.7 MPa.
An uneven nonwoven fabric was obtained by the same method as described above.
【００２４】実施例９
平均繊度１．６５デシテックス、平均繊維長２５ｍｍの
綿繊維５０質量％と、繊度２．７５デシテックス、繊維
長３８ｍｍの分割型繊維５０質量％とを混合し、ランダ
ムカード機にて、目付６０ｇ／ｍ2の綿繊維ウェブを準
備した。そして、その後は、実施例１と同一の方法で凹
凸不織布を得た。なお、ここで用いた分割型繊維は、日
本エステル社製のもので、横断面楔形のポリエチレンテ
レフタレート成分と、横断面楔形のナイロン６成分と
が、交互に１０個つづ配列して、全体として横断面が円
形に形成されたものである。この分割型繊維に高圧水流
を施すと、ポリエチレンテレフタレート成分とナイロン
６成分とが分割され、各々、１０本づつのポリエチレン
テレフタレート極細繊維（繊度約０．１４デシテック
ス）とナイロン６極細繊維（繊度約０．１４デシテック
ス）が生成し、綿繊維と緊密に交絡する。Example 9 50% by mass of cotton fibers having an average fineness of 1.65 decitex and an average fiber length of 25 mm and 50% by mass of split type fibers having a fineness of 2.75 decitex and a fiber length of 38 mm were mixed and mixed in a random card machine. A cotton fiber web having a basis weight of 60 g / m 2 was prepared. Then, thereafter, a concavo-convex nonwoven fabric was obtained by the same method as in Example 1. The split-type fiber used here was manufactured by Nippon Ester Co., Ltd., and a polyethylene terephthalate component having a wedge-shaped cross section and a nylon 6 component having a wedge-shaped cross-section were alternately arranged in groups of 10 pieces each, so that the fibers were crossed as a whole. The surface is formed in a circular shape. When a high-pressure water stream is applied to this split-type fiber, the polyethylene terephthalate component and the nylon 6 component are split, and 10 polyethylene terephthalate ultrafine fibers (fineness of about 0.14 decitex) and nylon 6 extrafine fiber (fineness of about 0 respectively) are split. 0.14 decitex) and intimately entangle with cotton fibers.
【００２５】比較例１
繊度２．２デシテックス、繊維長３８ｍｍのリヨセル繊
維（横断面は略円形状。レンチング社製）を用いて、ラ
ンダムカード機にて、目付５０ｇ／ｍ2のリヨセル繊維
ウェブを準備した。そして、その後は、実施例１と同一
の方法で凹凸不織布を得た。Comparative Example 1 Using a Lyocell fiber having a fineness of 2.2 decitex and a fiber length of 38 mm (transverse cross section is substantially circular; manufactured by Lenzing Co.), a Lyocell fiber web having a basis weight of 50 g / m 2 was obtained with a random card machine. Got ready. Then, thereafter, a concavo-convex nonwoven fabric was obtained by the same method as in Example 1.
【００２６】比較例２
繊度１．４３デシテックス、繊維長３８ｍｍのポリエチ
レンテレフタレート繊維（横断面は円形）を用いて、ラ
ンダムカード機にて、目付５０ｇ／ｍ2のポリエチレン
テレフタレート繊維ウェブを準備した。そして、その後
は、実施例１と同一の方法で凹凸不織布を得た。Comparative Example 2 Using a polyethylene terephthalate fiber having a fineness of 1.43 decitex and a fiber length of 38 mm (cross section is circular), a polyethylene terephthalate fiber web having a basis weight of 50 g / m 2 was prepared by a random card machine. Then, thereafter, a concavo-convex nonwoven fabric was obtained by the same method as in Example 1.
【００２７】比較例３
繊度２．２デシテックス、繊維長３８ｍｍの芯鞘型複合
繊維（横断面は円形）を用いて、ランダムカード機に
て、目付５０ｇ／ｍ2の芯鞘型複合繊維ウェブを準備し
た。そして、その後は、実施例１と同一の方法で凹凸不
織布を得た。なお、ここで用いた芯鞘型複合繊維は、芯
成分がポリエチレンテレフタレートよりなり、鞘成分が
ポリエチレンよりなるものである。Comparative Example 3 A core-sheath type composite fiber web having a basis weight of 50 g / m 2 was obtained using a random card machine using a core-sheath type composite fiber having a fineness of 2.2 decitex and a fiber length of 38 mm (the cross section was circular). Got ready. Then, thereafter, a concavo-convex nonwoven fabric was obtained by the same method as in Example 1. The core-sheath type composite fiber used here has a core component made of polyethylene terephthalate and a sheath component made of polyethylene.
【００２８】比較例４
実施例９で用いた分割型繊維を用いて、ランダムカード
機にて、目付５０ｇ／ｍ2の分割型繊維ウェブを準備し
た。そして、その後は、実施例１と同一の方法で凹凸不
織布を得た。Comparative Example 4 Using the splittable fibers used in Example 9, a splittable fiber web having a basis weight of 50 g / m 2 was prepared by a random card machine. Then, thereafter, a concavo-convex nonwoven fabric was obtained by the same method as in Example 1.
【００２９】実施例１〜９及び比較例１〜４に係る方法
で得られた凹凸不織布について、その目付、圧力０．２
９４ｋＰａ印加時における凹凸不織布の厚みをＸ（μ
ｍ）、圧力１．９６０ｋＰａ印加時における凹凸不織布
の厚みをＹ（μｍ）、厚み保持率〔（Ｙ×１００）／
Ｘ〕、圧力０．２９４ｋＰａ印加時における凹凸不織布
の嵩密度Ｘρ、圧力１．９６０ｋＰａ印加時における凹
凸不織布の嵩密度Ｙρ、引張強力を測定し、その結果を
表１に示した。With regard to the concavo-convex nonwoven fabrics obtained by the methods according to Examples 1 to 9 and Comparative Examples 1 to 4, the basis weight and the pressure were 0.2.
The thickness of the uneven nonwoven fabric when 94 kPa is applied is X (μ
m), the thickness of the uneven nonwoven fabric when a pressure of 1.960 kPa is applied is Y (μm), and the thickness retention rate [(Y × 100) /
X], the bulk density Xρ of the uneven nonwoven fabric when a pressure of 0.294 kPa was applied, the bulk density Yρ of the uneven nonwoven fabric when a pressure of 1.960 kPa was applied, and the tensile strength, and the results are shown in Table 1.
【００３０】ここで、上記各項目の測定方法は、以下の
とおりである。
（１）凹凸不織布の目付（ｇ／ｍ2）
標準状態の試料から、縦１０ｃｍ×横１０ｃｍの試料片
を１０点作成し、平衡水分に至らしめた後、各試料片の
質量（ｇ）を秤量し、得られた値の平均値に１００を乗
じて、目付（ｇ／ｍ2）とした。
（２）凹凸不織布の厚みＸ（μｍ）
標準状態の試料から、縦１０ｃｍ×横１０ｃｍの試料片
を１０点作成し、平衡水分に至らしめた後、厚み測定器
（株式会社大栄科学精機製作所製）を用いて、各試料片
に圧力０．２９４ｋＰａ（３ｇｆ／ｃｍ2）を印加して
厚みを測定し、その平均値を厚み（μｍ）とした。
（３）凹凸不織布の厚みＹ（μｍ）
標準状態の試料から、縦１０ｃｍ×横１０ｃｍの試料片
を１０点作成し、平衡水分に至らしめた後、厚み測定器
（株式会社大栄科学精機製作所製）を用いて、各試料片
に圧力１．９６０ｋＰａ（２０ｇｆ／ｃｍ2）を印加し
て厚みを測定し、その平均値を厚み（μｍ）とした。Here, the measuring method for each of the above items is as follows. (1) Unit weight of uneven nonwoven fabric (g / m 2 ) Ten pieces of 10 cm in length × 10 cm in width were prepared from a sample in a standard state, and after reaching equilibrium moisture, the mass (g) of each sample was measured. It was weighed, and the average value of the obtained values was multiplied by 100 to obtain a basis weight (g / m 2 ). (2) Thickness X (μm) of uneven nonwoven fabric From the sample in the standard state, 10 pieces of 10 cm in length × 10 cm in width were prepared, and after reaching equilibrium moisture, a thickness measuring instrument (manufactured by Daiei Kagaku Seiki Co., Ltd.) ) Was used to apply a pressure of 0.294 kPa (3 gf / cm 2 ) to each sample piece to measure the thickness, and the average value was defined as the thickness (μm). (3) Thickness Y of uneven nonwoven fabric (μm) Ten pieces of 10 cm long × 10 cm wide sample piece were prepared from a sample in a standard state, and after reaching equilibrium moisture, a thickness measuring instrument (manufactured by Daiei Kagaku Seiki Seisakusho Co., Ltd.) ) Was used to apply a pressure of 1.960 kPa (20 gf / cm 2 ) to each sample piece to measure the thickness, and the average value was defined as the thickness (μm).
【００３１】（４）厚み保持率（％）
上記（２）及び（３）で得られたＸ及びＹの値を用い、
〔（Ｙ×１００）／Ｘ〕なる式で、厚み保持率（％）を
求めた。
（５）凹凸不織布の嵩密度Ｘρ（ｇ／ｃｃ）
上記（１）で得られた目付（ｇ／ｍ2）と上記（２）で
得られたＸ（μｍ）を用い、目付／Ｘで算出した値を、
嵩密度Ｘρ（ｇ／ｃｃ）とした。
（６）凹凸不織布の嵩密度Ｙρ（ｇ／ｃｃ）
上記（１）で得られた目付（ｇ／ｍ2）と上記（３）で
得られたＹ（μｍ）を用い、目付／Ｙで算出した値を、
嵩密度Ｘρ（ｇ／ｃｃ）とした。
（７）引張強力（Ｎ／５ｃｍ巾）
標準状態の試料から、長さ２０ｃｍ×巾５ｃｍの短冊試
料片を５点作成し、引張試験機にて、引張速度１０ｃｍ
／分の条件で引っ張り、各短冊試料片が切断した時点で
の強力を求め、その平均値を引張強力（Ｎ／５ｃｍ巾）
とした。(4) Thickness retention (%) Using the values of X and Y obtained in (2) and (3) above,
The thickness retention rate (%) was determined by the formula [(Y × 100) / X]. (5) Bulk density of uneven nonwoven fabric Xρ (g / cc) Calculated by basis weight / X using the basis weight (g / m 2 ) obtained in the above (1) and X (μm) obtained in the above (2) The value
The bulk density Xρ (g / cc) was used. (6) Bulk density Yρ (g / cc) of textured nonwoven fabric Calculated by basis weight / Y using the basis weight (g / m 2 ) obtained in (1) above and Y (μm) obtained in (3) above The value
The bulk density Xρ (g / cc) was used. (7) Tensile strength (N / 5 cm width) From the sample in the standard state, 5 strips of 20 cm in length x 5 cm in width were prepared, and a tensile speed of 10 cm was obtained with a tensile tester.
The tensile strength (N / 5 cm width) is obtained by deriving the strength at the time when each strip sample piece was cut by pulling under the condition of / min.
And
【００３２】[0032]
【表１】 [Table 1]
【００３３】表１の結果から分かるように、実施例１〜
９に係る方法で得られた凹凸不織布は、比較例１〜４に
係る方法で得られたものに比べて、厚み保持率が高いこ
とが分かる。従って、拭き布等として使用したとき、実
施例１〜８に係る凹凸不織布は、表面の凹凸が保持さ
れ、塵埃等の拭き取り性が低下しにくいものである。As can be seen from the results in Table 1, Examples 1 to 1
It is understood that the uneven nonwoven fabric obtained by the method according to No. 9 has a higher thickness retention rate than those obtained by the methods according to Comparative Examples 1 to 4. Therefore, when used as a wiping cloth or the like, the concavo-convex nonwoven fabric according to Examples 1 to 8 retains the concavo-convex on the surface, and the wiping-off property for dust and the like is unlikely to deteriorate.
【００３４】[0034]
【作用】本発明に係る凹凸不織布は、高圧水流の作用に
よって綿繊維相互間が緊密に交絡されて形成されてなる
凸部を有している。綿繊維は、その横断面が扁平な異形
断面で且つ押し潰された中空を持っていること、綿繊維
が親水性に優れていることの理由から、高圧水流で綿繊
維を緊密に交絡させた凸部は、綿繊維相互間の間隙が小
さく、厚み方向に圧力を負荷しても、その厚みが減少し
にくくなると考えられる。The uneven nonwoven fabric according to the present invention has the convex portions formed by the intimate entanglement between the cotton fibers by the action of the high-pressure water flow. The cotton fiber was closely entangled with a high-pressure water stream because the cotton fiber has a flat cross-section and a crushed hollow, and the cotton fiber has excellent hydrophilicity. It is considered that the convex portions have a small gap between the cotton fibers and the thickness thereof is less likely to decrease even when pressure is applied in the thickness direction.
【００３５】[0035]
【発明の効果】従って、本発明に係る凹凸不織布を拭き
布等に用いた場合、使用時において、表面の凹凸状態が
保持されやすく、塵埃等の拭き取り性に優れるという効
果を奏する。Therefore, when the uneven nonwoven fabric according to the present invention is used for a wiping cloth or the like, the unevenness of the surface is easily maintained during use, and the effect of wiping off dust and the like is excellent.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 高岩 伸行 岐阜県不破郡垂井町2210 ユニチカ株式会 社垂井工場内 Ｆターム(参考） 4L047 AA08 AA21 AA23 AA27 AA28 AB08 BA04 CA12 CB10 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Nobuyuki Takaiwa 2210 Unitika Stock Association, Tarui-cho, Fuwa-gun, Gifu Prefecture Inside the company Tarui factory F-term (reference) 4L047 AA08 AA21 AA23 AA27 AA28 AB08 BA04 CA12 CB10
Claims (7)
布であって、多数の凸部と、該凸部間を繋ぐ凹部とを具
備し、該凸部は高圧水流の作用によって綿繊維相互間が
緊密に交絡されて形成されており、一方、該凹部は隣接
する該凸部間を繋ぐ綿繊維で形成されていることを特徴
とする厚み変化の少ない凹凸不織布。1. A concavo-convex nonwoven fabric composed mainly of cotton fibers, comprising a plurality of convex portions and concave portions connecting the convex portions, wherein the convex portions are formed between cotton fibers by the action of high-pressure water flow. Is formed by intimately entangled with each other, while the concave portions are formed of cotton fibers that connect the adjacent convex portions with each other.
請求項１記載の厚み変化の少ない凹凸不織布。2. The uneven nonwoven fabric with a small thickness change according to claim 1, wherein the number of convex portions is 3 to 25 / cm 2 .
凸不織布の厚みをＸ（μｍ）とし、圧力１．９６０ｋＰ
ａ印加時における凹凸不織布の厚みをＹ（μｍ）とした
とき、〔（Ｙ×１００）／Ｘ〕≧７５（％）である請求
項１又は２記載の厚み変化の少ない凹凸不織布。3. A pressure of 1.960 kP, where X (μm) is the thickness of the uneven nonwoven fabric when a pressure of 0.294 kPa is applied.
The uneven nonwoven fabric with a small thickness change according to claim 1 or 2, wherein [(Y × 100) / X] ≧ 75 (%), where Y (μm) is the thickness of the uneven nonwoven fabric when a is applied.
請求項１乃至３のいずれか一項に記載の厚み変化の少な
い凹凸不織布。4. The concavo-convex nonwoven fabric with a small thickness change according to claim 1, wherein ultrafine fibers are mixed in addition to cotton fibers.
ブを、孔開き支持体に坦持した後、該繊維ウェブ側から
高圧水流を施して、該孔開き支持体の開孔部に該綿繊維
を移動させながら、該綿繊維相互間を交絡させて、多数
の凸部を形成することを特徴とする請求項１記載の厚み
変化の少ない凹凸不織布の製造方法。5. A fiber web mainly composed of cotton fibers is carried on a perforated support, and then a high-pressure water stream is applied from the side of the fiber web so that the cotton is applied to the perforated part of the perforated support. The method for producing a concavo-convex nonwoven fabric with a small thickness change according to claim 1, wherein a number of convex portions are formed by interlacing the cotton fibers while moving the fibers.
繊維ウェブを用いる請求項５記載の厚み変化の少ない凹
凸不織布の製造方法。6. The method for producing a concavo-convex nonwoven fabric with a small change in thickness according to claim 5, wherein a fiber web in which ultrafine fibers are mixed in addition to cotton fibers is used.
ッシュの粗目織物を用いる請求項５又は６記載の厚み変
化の少ない凹凸不織布の製造方法。7. The method for producing a concavo-convex nonwoven fabric with a small change in thickness according to claim 5 or 6, wherein a coarse woven fabric having openings of 6 to 20 mesh is used as the perforated support.
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| JP2001377361A JP3924160B2 (en) | 2001-12-11 | 2001-12-11 | Method for producing uneven nonwoven fabric with little thickness change |
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|---|---|---|---|
| JP2001377361A JP3924160B2 (en) | 2001-12-11 | 2001-12-11 | Method for producing uneven nonwoven fabric with little thickness change |
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| JP3924160B2 JP3924160B2 (en) | 2007-06-06 |
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|---|---|---|---|
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011038223A (en) * | 2009-08-17 | 2011-02-24 | Kuraray Kuraflex Co Ltd | Nonwoven fabric with relief pattern |
| JP2016138346A (en) * | 2015-01-27 | 2016-08-04 | ユニチカ株式会社 | Manufacturing method of laminated fabric |
| JP2016141896A (en) * | 2015-01-30 | 2016-08-08 | ユニチカ株式会社 | Cleaning cloth manufacturing method |
| JP2017008424A (en) * | 2015-06-17 | 2017-01-12 | ユニチカ株式会社 | Method for producing coating-agent coating cloth |
-
2001
- 2001-12-11 JP JP2001377361A patent/JP3924160B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011038223A (en) * | 2009-08-17 | 2011-02-24 | Kuraray Kuraflex Co Ltd | Nonwoven fabric with relief pattern |
| JP2016138346A (en) * | 2015-01-27 | 2016-08-04 | ユニチカ株式会社 | Manufacturing method of laminated fabric |
| JP2016141896A (en) * | 2015-01-30 | 2016-08-08 | ユニチカ株式会社 | Cleaning cloth manufacturing method |
| JP2017008424A (en) * | 2015-06-17 | 2017-01-12 | ユニチカ株式会社 | Method for producing coating-agent coating cloth |
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| Publication number | Publication date |
|---|---|
| JP3924160B2 (en) | 2007-06-06 |
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