JP2015067936A - Nonwoven fabric - Google Patents
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- JP2015067936A JP2015067936A JP2013206397A JP2013206397A JP2015067936A JP 2015067936 A JP2015067936 A JP 2015067936A JP 2013206397 A JP2013206397 A JP 2013206397A JP 2013206397 A JP2013206397 A JP 2013206397A JP 2015067936 A JP2015067936 A JP 2015067936A
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Abstract
Description
本発明は、不織布に関するものであり、特にワックス等の粘性物や固形物の拭き取りや、対人用である排泄物の拭き取りに好適な不織布に関するものである。 The present invention relates to a non-woven fabric, and more particularly to a non-woven fabric suitable for wiping off viscous materials such as wax and solid materials, and wiping off excrement for human use.
対人あるいは対物用途として各種ワイパーが提案され、使用されている。特にスパンレース不織布は、構成繊維同士が交絡することによってのみ一体化してなるものであるため、風合いが良く、拭き取り対象物に対してキズ等を付ける恐れがないため、各種の拭き取り用途に好適に使用されている（例えば、特許文献１）。この技術によれば、特定の開孔を設けているため、ドライ状態でもウェット状態でも、また、小さなゴミから粘着物まで幅広く捕捉するというものである。しかしながら、実施例によれば、粘性物の捕集率は５０％程度であり、高い拭き取り性を有するとはいいがたい。 Various wipers have been proposed and used for personal or objective purposes. In particular, spunlace nonwoven fabrics are integrated only by entanglement of constituent fibers, so the texture is good and there is no risk of scratches on the object to be wiped, making it suitable for various wiping applications. It is used (for example, patent document 1). According to this technique, since a specific opening is provided, it is possible to capture a wide range from a small dust to an adhesive in a dry state or a wet state. However, according to the examples, the collection rate of the viscous material is about 50%, and it is difficult to say that it has a high wiping property.
本発明は、捕捉物が粘性状のものであっても、高い捕集率となる拭き取り性能に優れた不織布を提供することを課題とする。 This invention makes it a subject to provide the nonwoven fabric excellent in the wiping performance which becomes a high collection rate, even if a capture thing is a viscous thing.
そして、この課題を達成するために検討した結果、スパンレース不織布において、セルロース系繊維と特定の異型断面を有するアクリル繊維とを構成繊維とすることにより、高い拭き取り性能を発揮することを見出し、本発明に到達した。 And, as a result of studying to achieve this problem, in spunlace nonwoven fabric, it was found that cellulosic fibers and acrylic fibers having a specific atypical cross section are used as constituent fibers, thereby demonstrating high wiping performance. The invention has been reached.
すなわち、本発明は、セルロース系短繊維と、異型断面を有するアクリル短繊維とを構成繊維とし、構成繊維同士が三次元的に交絡一体化してなる不織布であり、アクリル短繊維は、その断面形状が短冊形であって、かつ、短冊形には、短軸方向にそれぞれ突出してなる円弧状の突出部を有し、該突出部のそれぞれの突出高さが短軸の長さの０．５〜１．５倍の範囲にあり、短冊形における短軸と長軸との比が１：１０〜１：１５の範囲であることを特徴とする不織布を要旨とするものである。 That is, the present invention is a nonwoven fabric in which cellulosic short fibers and acrylic short fibers having an irregular cross section are used as constituent fibers, and the constituent fibers are three-dimensionally entangled and integrated, and the acrylic short fibers have a cross-sectional shape. Is a rectangular shape, and the rectangular shape has arc-shaped protruding portions each protruding in the short axis direction, and each protruding height of the protruding portion is 0.5 of the length of the short axis. The gist of the nonwoven fabric is in the range of ~ 1.5 times, and the ratio of the short axis to the long axis in the strip is in the range of 1:10 to 1:15.
以下、本発明を詳細に説明する。 Hereinafter, the present invention will be described in detail.
本発明の不織布は、セルロース系短繊維と特定の異型断面を有するアクリル短繊維とを構成繊維とし、構成繊維同士が三次元的に交絡一体化してなる。 The nonwoven fabric of the present invention comprises cellulosic short fibers and acrylic short fibers having a specific unusual cross section as constituent fibers, and the constituent fibers are three-dimensionally entangled and integrated.
本発明で用いるアクリル短繊維は、横断面形状が特定の異型断面であって、ここに特徴を有する。この横断面形状（１）は、図１に示すように、短冊形（２）であって、かつ、短冊形の長軸方向の特定の位置において、短軸方向にそれぞれ突出してなる円弧状の突出部（３）を有する。このように断面形状が短冊形であるため、角のエッジ部分がシャープであり、かつ扁平な形状であることから、良好に粘性物をこそぎ取ることができ、粘性物の捕集性が向上すると推定する。また、横断面形状が、単なる短冊形や楕円形等の扁平な繊維の場合、布帛としたときには、横断面形状の長軸方向が布帛の厚み方向に位置するように配列しにくく、繊維間の空隙が小さく厚みの薄い布帛になるが、本発明のごとく、繊維同士が機械的に三次元交絡した場合であって、特に交絡手段として高圧水流を施した場合は、繊維断面の長軸方向が厚み方向に配列したり、厚み方向に対して斜めの方向に配列したりと、ランダムに配列することとなり、繊維間の空隙をより大きく保持できる嵩高な不織布が得られる。本発明においては、短冊形であり、かつ、短冊形の長軸方向の特定の位置に、短軸方向にそれぞれ突出してなる円弧状の突出部を有することから、隣接する繊維の間に、この突出部の存在によって空隙をより容易に保持できるため、よりいっそう嵩高な形態が保持できうる不織布が得られる。なお、図１は、突出部の位置が短冊形の長軸方向のほぼ中央の位置に存在している例を示し、図２は、突出部の位置が長軸方向の片側に偏った位置に存在している例である。本発明においては、より効果的に空隙を保持できること等の理由から、突出部の位置は、短冊形の長軸方向のほぼ中央の位置に存在していることが好ましい。 The acrylic short fiber used in the present invention has a specific cross-section having a specific cross-sectional shape, and has a feature here. As shown in FIG. 1, the cross-sectional shape (1) is a strip (2), and is an arc shape projecting in the short axis direction at a specific position in the long axis direction of the strip. It has a protrusion (3). Since the cross-sectional shape is strip-shaped in this way, the edge of the corner is sharp and flat, so that viscous materials can be scraped well and the collection of viscous materials is improved. I guess. In addition, when the cross-sectional shape is a flat fiber such as a simple strip or ellipse, when it is a fabric, it is difficult to arrange the cross-sectional shape so that the major axis direction of the cross-sectional shape is located in the thickness direction of the fabric. Although the gap is small and the fabric is thin, as in the present invention, when the fibers are mechanically entangled three-dimensionally, particularly when a high-pressure water flow is applied as the entanglement means, the major axis direction of the fiber cross section is Arranging in the thickness direction or in an oblique direction with respect to the thickness direction will result in random arrangement, and a bulky nonwoven fabric that can hold larger gaps between fibers can be obtained. In the present invention, since it has a strip shape and has an arc-shaped projecting portion projecting in the minor axis direction at a specific position in the major axis direction of the strip shape, between the adjacent fibers, Since the voids can be held more easily due to the presence of the protrusions, a nonwoven fabric that can hold a more bulky form is obtained. FIG. 1 shows an example in which the position of the projecting portion exists at a substantially central position in the long axis direction of the strip, and FIG. 2 shows a position in which the position of the projecting portion is biased to one side in the long axis direction. It is an example that exists. In the present invention, it is preferable that the position of the projecting portion is present at a substantially central position in the major axis direction of the strip, for the reason that the gap can be more effectively retained.
突出部（３）のそれぞれの突出高さは、短軸の長さの０．５〜１．５倍の範囲である。短軸長さの０．５倍よりも小さいと、突出している効果を良好に奏しない傾向となり、また、１．５倍を超えると、アクリル短繊維の断面形状自体が扁平なものとはいいがたくなる。 Each protrusion height of the protrusion (3) is in the range of 0.5 to 1.5 times the length of the short axis. If the length is shorter than 0.5 times the short axis length, the protruding effect tends to be poor, and if it exceeds 1.5 times, the cross-sectional shape of the acrylic short fiber itself is flat. I get tired.
アクリル短繊維の横断面形状における短冊形の短軸と長軸との比は、１：１０〜１：１５である。この範囲にすることにより、不織布に良好な空隙を保持させることができることから、この繊維間の空隙に捕集した粘性物や固形物等を保持することができ、また、捕捉物を良好に保持できるために、汚れが他面に移行することなく、手で拭き取りを行った際に手が汚れにくい。 The ratio of the short axis to the long axis of the strip in the cross-sectional shape of the acrylic short fiber is 1:10 to 1:15. By setting it within this range, it is possible to hold good voids in the nonwoven fabric, so it is possible to hold the viscous material or solid matter collected in the voids between the fibers, and to hold the captured material well. As a result, it is difficult for the hand to become dirty when wiping by hand without causing the dirt to migrate to the other side.
アクリル短繊維の繊度は、３〜８デシテックス程度が好ましい。８デシテックスを超えると、剛性が高くなり、拭き取り対象物を傷つける恐れが生じ、また、３デシテックス未満であると、繊維にコシがなくなり、繊維間の空隙を良好に保持できない傾向となり、また、被対象物との摩擦抵抗が大きくなるため、拭き取り時に抵抗を感じやすい。 The fineness of the acrylic short fibers is preferably about 3 to 8 dtex. If it exceeds 8 dtex, the rigidity becomes high and the object to be wiped may be damaged, and if it is less than 3 dtex, the fibers tend to be stiff and the gap between the fibers tends not to be retained well. Since the frictional resistance with the object increases, it is easy to feel resistance when wiping.
本発明の不織布は、上記したアクリル短繊維とセルロール系短繊維とから構成される。セルロース系短繊維としては、コットン、レーヨン、リヨセル（溶剤紡糸セルロース繊維）が挙げられ、これらの１種または複数種を用いるとよい。セルロース系繊維は、その性質上、吸水性を有していることから、不織布に吸水性能や吸湿性能を具備させることができる。また、セルロース系短繊維は、交絡手段である高圧水流のエネルギーにより、容易に曲げられるため、強固に絡みつくことができる。したがって、上記したアクリル短繊維が、高圧水流の作用によって、良好に曲げにくいものであっても、アクリル短繊維同士を絡める繋ぎの役目を果たし、良好に交絡一体化してなる不織布を得ることができる。セルロース系短繊維の繊度としては、１〜２．５デシテックス程度のものを好ましく用いることができる。 The nonwoven fabric of the present invention is composed of the above-mentioned acrylic short fibers and cellulose short fibers. Examples of the cellulose-based short fibers include cotton, rayon, and lyocell (solvent-spun cellulose fibers), and one or more of these may be used. Cellulosic fibers are water-absorbing in nature, so that the nonwoven fabric can be provided with water-absorbing performance and moisture-absorbing performance. Cellulose short fibers can be easily entangled because they are easily bent by the energy of the high-pressure water stream that is an entanglement means. Therefore, even if the acrylic short fibers described above are difficult to bend well due to the action of high-pressure water flow, they can serve as a tie for tangling the acrylic short fibers, and a nonwoven fabric that is well entangled and integrated can be obtained. . As the fineness of the cellulose short fibers, those of about 1 to 2.5 dtex can be preferably used.
本発明の不織布は、構成繊維同士が三次元的に交絡一体化したものであるが、三次元的に交絡する手段としては、上記した高圧水流を施す以外に、ニードルパンチ法も挙げられる。得られる不織布の風合い等を考慮すると、高圧水流を施す、いわゆるスパンレース法が好ましい。 The non-woven fabric of the present invention is one in which constituent fibers are entangled and integrated three-dimensionally, but as a means for entanglement three-dimensionally, in addition to applying the above-described high-pressure water flow, a needle punch method is also exemplified. In consideration of the texture of the resulting nonwoven fabric, a so-called spunlace method in which high-pressure water flow is applied is preferable.
アクリル短繊維とセルロース系短繊維との混合比率は、アクリル短繊維／セルロース系短繊維＝３０〜７０／７０〜３０がよく、より好ましくは、アクリル短繊維／セルロース系短繊維＝７０〜５０／３０〜５０である。アクリル短繊維を３０質量％以上とすることにより、本発明が目的とする嵩高性、適度な厚み、汚れのかきとり性、拭き取った汚れの保持性が向上するものとなり、一方、７０質量％以下とすることにより、構成繊維同士が良好に絡んで一体化し、実用的な強度が保持でき、また、不織布に吸水性を具備させて拭き取り性が良好となる。 The mixing ratio of acrylic short fibers and cellulose short fibers is preferably acrylic short fibers / cellulosic short fibers = 30 to 70 / 70-30, more preferably acrylic short fibers / cellulosic short fibers = 70 to 50 /. 30-50. By setting the acrylic short fiber to 30% by mass or more, the bulkiness, appropriate thickness, dirt scraping property, and dirt holding property of the wiped object of the present invention are improved. By doing so, the constituent fibers are well entangled and integrated, so that practical strength can be maintained, and the nonwoven fabric is provided with water absorption, so that the wiping property is improved.
本発明で得られる不織布は、特定の断面形状を有するアクリル短繊維とセルロース系短とを構成繊維とし、三次元的に交絡一体化したものであり、アクリル短繊維有する特定の断面形状により、嵩高性の良好なものとなるとともに、拭き取り用として使用した場合には、良好な掻き取り性を発揮するとともに、拭き取った汚れを良好に保持する保持性を発揮する。また、セロース系短繊維により、不織布に吸水性を具備させるとともにも実用的な強度をも具備できる。
したがって、本発明の不織布は、ワックス等の粘性物や固形物の拭き取りや、対人用である排泄物の拭き取りに好適に使用できる。
The nonwoven fabric obtained by the present invention is a three-dimensional entangled and integrated acrylic short fiber having a specific cross-sectional shape and a cellulose short fiber, and is bulky due to the specific cross-sectional shape having the acrylic short fiber. When it is used for wiping, it exhibits good scraping properties and retains the wiping dirt well. Moreover, with the cellulose short fiber, the nonwoven fabric can be provided with water absorption and can have practical strength.
Therefore, the nonwoven fabric of the present invention can be suitably used for wiping off viscous materials such as wax and solid materials, and wiping off excrement for human use.
以下、実施例に基づい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。なお、以下の実施例および比較例の各種物性値は以下の方法により測定した。
（１）目付（ｇ／ｍ２）：縦１０ｃｍ×横１０ｃｍの試料片を１０点作成し、標準状態の各試料片の質量（ｇ）を秤量し、得られた値の平均値を単位面積当たりに換算して、目付（ｇ／ｍ２）とした。
EXAMPLES Hereinafter, although this invention is demonstrated based on an Example, this invention is not limited to an Example. Various physical property values of the following examples and comparative examples were measured by the following methods.
(1) Weight per unit area (g / m 2 ): Ten sample pieces each having a length of 10 cm and a width of 10 cm were prepared, the mass (g) of each sample piece in a standard state was weighed, and the average value of the obtained values was unit area In terms of per unit weight, the basis weight (g / m 2 ) was obtained.
（２）厚み（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。 (2) Thickness (μm): Ten sample pieces 10 cm long × 10 cm wide were prepared from a standard sample and allowed to reach equilibrium moisture, and then a thickness measuring instrument (manufactured by Daiei Kagaku Seiki Seisakusho Co., Ltd.) was used Then, a pressure of 0.294 kPa (3 gf / cm 2 ) was applied to each sample piece to measure the thickness, and the average value was taken as the thickness (μm).
（３）嵩密度（ｇ／ｃｃ）：上記（１）で得られた目付（ｇ／ｍ２）と上記（２）で得られた厚み（μｍ）を用い、目付／厚みで算出した値を、嵩密度（ｇ／ｃｃ）とした。また、厚みに関しては単純な厚さだけではなく繊維間の空隙を設け汚れの吸収と保持を行う機能を有する事が必要なため、本発明においては、嵩密度で０．１０ｇ／ｃｃ以下であることが好ましく、０．０９ｇ／ｃｃ以下であることがより好ましく、さらに好ましくは０．０８ｇ／ｃｃ以下である。 (3) Bulk density (g / cc): Using the basis weight (g / m 2 ) obtained in the above (1) and the thickness (μm) obtained in the above (2), the value calculated by the basis weight / thickness is And bulk density (g / cc). Further, regarding the thickness, it is necessary to have not only a simple thickness but also a function of providing a gap between fibers to absorb and retain dirt, so in the present invention, the bulk density is 0.10 g / cc or less. It is preferably 0.09 g / cc or less, more preferably 0.08 g / cc or less.
（４）引張強度（Ｎ／５ｃｍ）：ＪＩＳ−Ｌ−１９０６（２０００年）Ａに記載の方法に準じて測定した。すなわち、試料巾５ｃｍの短冊状態試料片を準備し、定速伸張型引張試験機（東洋ボールドウィン社製 テンシロン 型式：ＵＴＭ−４−１００）を用いて、試料片をチャック間１０ｃｍ、引張速度１０ｍ／分で伸張し、各試料片の破断したときの荷重を引張強力とした。 (4) Tensile strength (N / 5 cm): Measured according to the method described in JIS-L-1906 (2000) A. That is, a strip-shaped sample piece having a sample width of 5 cm was prepared, and the specimen was separated by 10 cm between chucks and a tensile speed of 10 m / min using a constant speed extension type tensile tester (Tensilon model: UTM-4-100 manufactured by Toyo Baldwin). The tensile strength was defined as the load when each sample piece was broken.
（５）拭き取り除去率（％）：平滑な板（アクリル板）を用意した。絵の具（Ｐｅｎｔｅｌ ＷＡＴＥＲＣＯＬＯＲＳ Ｆ ＣＯＢＡＬＴＢＬＵＥ ＸＷＦＣＴ２３）０．５ｇをアクリル板の上に１０円玉サイズに拡げ、絵具を載せた状態のアクリル板の重量を測定し、これを「拭き取り前のアクリル板と絵具の重量（ｇ）」とした。試料（１０ｃｍ×１０ｃｍ）を用意し、この試料に、試料質量の２４０％の量の水を含ませて２つに折りたたんものを、アクリル板上に乗せ、その上に荷重１００ｇを乗せる。試料を手で引っ張り、絵具を拭き取った後、絵具が一部残存しているアクリル板の重量（「拭き取り後のアクリル板と絵具の重量（ｇ）」）を測定し、下記式から除去率を算出した。本発明においては、除去率は７０％以上が好ましく、より好ましくは８０％以上である。
（拭き取り前のアクリル板と絵具の重量（ｇ）−拭き取り後のアクリル板と絵具の重量（ｇ））×１００／拭き取り前の絵の具の重量（ｇ）＝除去率（％）
(5) Wiping removal rate (%): A smooth plate (acrylic plate) was prepared. Spread 0.5 g of paint (Pentel WATERCOLORS F COBALTBLUE XWFCT23) to a 10-yen coin size on the acrylic board, measure the weight of the acrylic board with the paint on it, (G) ". A sample (10 cm × 10 cm) is prepared, and this sample is soaked with water in an amount of 240% of the sample mass and folded in two on an acrylic plate, and a load of 100 g is placed thereon. After pulling the sample by hand and wiping off the paint, measure the weight of the acrylic board where the paint remains partially ("weight of acrylic board and paint after wiping (g)"), and calculate the removal rate from the following formula Calculated. In the present invention, the removal rate is preferably 70% or more, more preferably 80% or more.
(Weight of acrylic plate and paint before wiping (g) -weight of acrylic plate and paint after wiping (g)) × 100 / weight of paint before wiping (g) = removal rate (%)
（６）吸水量（ｍｍ／１０分）：ＪＩＳ−Ｌ−１９０７ バイレック法に準じて測定した。なお、試料としては、試料長２５ｃｍ、試料幅２．５ｃｍのものを用いた。本発明においては、ここでの評価による値が４０ｍｍ以上であることが好ましい。 (6) Water absorption (mm / 10 minutes): Measured according to JIS-L-1907 Bayrec method. A sample having a sample length of 25 cm and a sample width of 2.5 cm was used. In this invention, it is preferable that the value by evaluation here is 40 mm or more.
実施例１
アクリル短繊維（三菱レイヨン社製 Ｈ１８０ＢＲＥ 繊度６．５デシテックス、繊維長５１ｍｍ、短軸と長軸の比が１：１２、突出部の高さがそれぞれ短軸の長さの０．８倍）を準備した。また、セルロース系短繊維として平均繊度１．６５デシテックス、平均繊維長２５ｍｍのコットンを準備した。
Example 1
Acrylic short fibers (Made by Rayon, H180BRE fineness 6.5 decitex, fiber length 51 mm, ratio of short axis to long axis is 1:12, the height of the protrusion is 0.8 times the length of each short axis) Got ready. Further, cotton having an average fineness of 1.65 dtex and an average fiber length of 25 mm was prepared as the cellulose short fibers.
アクリル短繊維とコットンとを、質量比で（アクリル短繊維／コットン）＝５０／５０の比率で均一に混綿して、カード機に供給して、目付４０ｇ／ｍ２のウェブとした。 Acrylic short fibers and cotton were uniformly mixed at a mass ratio of (acrylic short fibers / cotton) = 50/50 and supplied to a card machine to obtain a web having a basis weight of 40 g / m 2 .
得られたウェブを、目開き１００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）上に担持し、ウェブ側から高圧水流を施した。高圧水流は、支持体に上方５０ｍｍに位置した孔径０．１ｍｍの噴射孔が孔間隔０．６ｍｍで一列配置された噴射装置を用い、水圧２．７５ＭＰａで１回、４．１２ＭＰａで２回の合計３回について、ウェブの両面から噴射した。高圧水流を施すことにより、ウェブの構成繊維が三次元的に交絡して一体化した。次いで、構成繊維同士が交絡したウェブより余剰の水分をマングルロールにて除去し、温度１２０℃の乾燥機で乾燥させて、本発明のスパンレース不織布を得た。 The obtained web was supported on a metal mesh screen having a mesh size of 100 mesh (mesh woven using a metal wire and a plain weave structure), and a high-pressure water flow was applied from the web side. The high-pressure water flow uses an injection device in which injection holes with a hole diameter of 0.1 mm located 50 mm above the support are arranged in a row with a hole interval of 0.6 mm, and water pressure is 2.75 MPa once and 4.12 MPa twice. A total of 3 shots were sprayed from both sides of the web. By applying a high-pressure water stream, the constituent fibers of the web were three-dimensionally entangled and integrated. Next, excess water was removed with a mangle roll from the web in which the constituent fibers were entangled, and dried with a drier at a temperature of 120 ° C. to obtain the spunlace nonwoven fabric of the present invention.
実施例２
実施例１において、アクリル短繊維とコットンの比率を、質量比で（アクリル短繊維／コットン）＝７０／３０とした以外は、実施例１と同様にしてスパンレース不織布を得た。
Example 2
In Example 1, a spunlace nonwoven fabric was obtained in the same manner as in Example 1 except that the ratio of acrylic short fibers to cotton was (acrylic short fibers / cotton) = 70/30 in terms of mass ratio.
実施例３
実施例１において、アクリル短繊維とコットンの比率を、質量比で（アクリル短繊維／コットン）＝３０／７０とした以外は、実施例１と同様にしてスパンレース不織布を得た。
Example 3
In Example 1, a spunlace nonwoven fabric was obtained in the same manner as in Example 1 except that the ratio of acrylic short fibers to cotton was (acrylic short fibers / cotton) = 30/70 in terms of mass ratio.
実施例４
実施例１において、コットンに代えてリヨセル（繊度：１．７デシテックス 繊維長：３８ｍｍ）使用した以外は、実施例１と同様にしてスパンレース不織布を得た。
Example 4
A spunlace nonwoven fabric was obtained in the same manner as in Example 1, except that lyocell (fineness: 1.7 dtex fiber length: 38 mm) was used instead of cotton.
実施例５
実施例１において、コットンに代えてレーヨン（繊度：１．７デシテックス 繊維長：４０ｍｍ）を使用した以外は実施例１と同様にしてスパンレース不織布を得た。
Example 5
A spunlace nonwoven fabric was obtained in the same manner as in Example 1, except that rayon (fineness: 1.7 dtex fiber length: 40 mm) was used instead of cotton.
比較例１
実施例１において、セルロース系短繊維を用いずに、アクリル短繊維（三菱レイヨン株式会社製 Ｈ１８０ＢＲＥ 繊度６．５デシテックス、繊維長５１ｍｍ）のみを用いたこと以外は、実施例１と同様にして不織布を得た。得られた不織布は、機械的強度に乏しく実用性のないものであった。
Comparative Example 1
In Example 1, a nonwoven fabric was used in the same manner as in Example 1 except that only short acrylic fibers (H180BRE fineness 6.5 decitex, fiber length 51 mm, manufactured by Mitsubishi Rayon Co., Ltd.) were used without using cellulose short fibers. Got. The obtained nonwoven fabric had poor mechanical strength and was impractical.
比較例２
実施例１において、アクリル短繊維を用いずに、コットン（平均繊度１．６５デシテックス、平均繊維長２５ｍｍ）のみを用いたこと以外は、実施例１と同様にしてスパンレース不織布を得た。得られた不織布は、拭き取り除去率が７０％に満たないものであった。
Comparative Example 2
In Example 1, a spunlace nonwoven fabric was obtained in the same manner as in Example 1 except that only the cotton (average fineness 1.65 dtex, average fiber length 25 mm) was used without using the acrylic short fibers. The obtained nonwoven fabric had a wiping removal rate of less than 70%.
１ アクリル短繊維の横断面形状
２ 短冊形
３ 突出部
1 Cross-sectional shape of acrylic short fiber 2 Strip 3 Protrusion
Claims (8)
アクリル短繊維は、その断面形状が短冊形であって、かつ、短冊形には、短軸方向にそれぞれ突出してなる円弧状の突出部を有し、該突出部のそれぞれの突出高さが短軸の長さの０．５〜１．５倍の範囲にあり、短冊形における短軸と長軸との比が１：１０〜１：１５の範囲であることを特徴とする不織布。 Cellulosic short fibers and acrylic short fibers having an atypical cross section are used as the constituent fibers, and the constituent fibers are nonwoven fabrics that are three-dimensionally entangled and integrated,
The acrylic short fiber has a strip shape in cross section, and the strip shape has arc-shaped projecting portions that project in the short axis direction, and the projecting heights of the projecting portions are short. A nonwoven fabric characterized in that it is in a range of 0.5 to 1.5 times the length of the shaft, and the ratio of the short axis to the long axis in the strip is in the range of 1:10 to 1:15.
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| JP2019119963A (en) * | 2018-01-04 | 2019-07-22 | 日本製紙クレシア株式会社 | Nonwoven fabric wiper, method and apparatus for producing the same |
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