JP4212948B2 - Interpersonal wiper - Google Patents

Interpersonal wiper Download PDF

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Publication number
JP4212948B2
JP4212948B2 JP2003127805A JP2003127805A JP4212948B2 JP 4212948 B2 JP4212948 B2 JP 4212948B2 JP 2003127805 A JP2003127805 A JP 2003127805A JP 2003127805 A JP2003127805 A JP 2003127805A JP 4212948 B2 JP4212948 B2 JP 4212948B2
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Prior art keywords
water
fiber
sheet material
absorbent sheet
mass
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JP2004330543A (en
Inventor
清一 瀧川
直樹 石井
数彦 齋藤
純人 清岡
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Kuraray Co Ltd
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Kuraray Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、吸水性シート材料を用いてなる対人用ワイパーに関するものであり、より詳細には吸水性、保水性に富み、嵩高でソフトな風合を有し、かつべとつき感の少ない対人用ワイパーに関する。
【0002】
【従来の技術】
従来、ウェットワイパーや使い捨ておしぼりとして、セルロースパルプやレーヨン等の親水性繊維を主成分とするシートに高圧水流処理を施した不織布が数多く使用されている。しかしながら、これらの不織布は、対人用のワイパーとして使用した場合、表面肌触りがべとついた感触となる等の問題点があった。
【0003】
このような問題を解決するために、芯鞘型複合繊維の鞘成分に特定のエステル化合物を含有させた耐久性親水性繊維を用いた不織布(特許文献1参照)やポリエステル繊維に特定の共重合体分散液を含浸させて親水性を付与し、かかる繊維を用いた不織布(特許文献2参照)が提案されている。しかしながら、これらの不織布は、対人用のワイパーとして使用した場合、表面の肌触りがべとついた感触となるという問題点が指摘されていた。
【0004】
【特許文献1】
特開2002−146630号公報
【特許文献2】
特開2001−303450号公報
【0005】
【発明が解決しようとする課題】
本発明は、前記の問題を解決するものであり、その目的は、湿潤時においてもボリューム感があり、ソフトな風合を有し、表面肌触りがべとついた感触とならない吸水性シート材料を用いてなる対人用ワイパーを提供することにある。
【0006】
【課題を解決するための手段】
すなわち本発明は、セルロースパルプ層の少なくとも片面に、親水性油剤が0.01〜0.2質量%付着した熱可塑性捲縮繊維を含むウエブ層が積層されてなる吸水性シート材料を用いてなる対人用ワイパーである。
【0007】
【発明の実施の形態】
発明を構成するセルロースパルプ層は、一般にティッシュ等に用いられているクラフトパルプ等を使用可能であるが、後述するウェブ層とより絡合しやすいように接着成分を含まない、または含んでいたとしても少量であるパルプシートが好んで使用される。
本発明においては、製品に十分な吸水性あるいは保水性を保持させるために、該セルロースパルプ層の目付は10g/m以上が好ましく、より好ましくは10〜50g/mである。
【0008】
また、本発明を構成するウエブ層に用いる熱可塑性捲縮繊維の素材としては、ポリエステル系重合体、ポリオレフィン系重合体、ポリアミド系重合体、ポリスチレン系重合体、ポリアクリルニトリル系重合体、ポリビニルアルコール系重合体、エチレン−ビニルアルコール系共重合体、ポリ乳酸系重合体などを挙げることができ、1種、または2種以上のポリマーを用いることができるが、これらに限定されるものではない。
【0009】
中でも本発明においては、公定水分率が1%以下であり、湿潤時に強度低下や嵩へたりを起こさない繊維であることが好ましい。具体的にはポリエステル系繊維やポリプロピレン系繊維が挙げられ、中でもポリエステル繊維が特に好ましい。
また、該熱可塑性捲縮繊維は、上記したポリマー単独からなる繊維でもよいし、2種以上のポリマーを用いた複合繊維でもよい。複合形態としては、芯鞘型、サイドバイサイド型、ランダム複合型、多層貼合型等を用いることができる。一方、これら繊維の断面形状についても、中実断面形状、異形断面形状等種々の断面形状とすることができる。
該熱可塑性捲縮繊維は、単繊維繊度0.6〜5.5dtexの繊維を用いることが好ましいが、0.6dtex未満の極細繊維を用いることで、風合、吸水性シート強力などの向上が期待できる。一方、数dtex以上の比較的太繊度のものあるいは異形断面繊維を用いると、本発明のシート材料の嵩高性を高めることができる。すなわち、本発明においては、目的とする用途等に応じて繊度、断面形状を適宜選択すればよい。
【0010】
該熱可塑性捲縮繊維は、捲縮短繊維として準備され、カードウエブやランダムウエブ等により形成されるウエブ層として本発明の吸水性シート材料製造に供される。該繊維はカードウェブまたは不織布の形成しやすさを考慮した場合、繊維長は25〜100mmが適しており、より好ましくは、30〜60mmである。また、捲縮数は、10〜20個/25mmが好ましく、12〜18個/25mmがより好ましい。捲縮率は、12〜18%が好ましく、13〜16%がより好ましい。
該ウエブ層の目付(両面に使用する場合は片側のウエブの目付)は8〜50g/mが適している。該ウエブの目付は、パルプ層の目付より小さいことが好ましく、逆の場合はシート全体としての吸水量が増大しないまま最終製品のシートとしての重量、厚さが大きくなり、目的とするワイパー、おしぼり等の用途によっては適しにくい場合がある。
【0011】
本発明では、該ウエブ層が、親水性油剤を付着させた熱可塑性捲縮繊維を含む点に特徴を有する。かかる親水性油剤として、低分子量のポリエステル樹脂、リン酸エステルアルカリ金属塩、アクリル酸エステル共重合樹脂等の硫酸エステル型アニオン表面活性剤が使用可能であるが、特に耐久性の点からグリコール系エステル樹脂が有効である。さらに、繊維に対する付着耐久性を向上するために、前記した親水性油剤とポリウレタン、アクリル等の樹脂成分とを併用してもよい。
一方、熱可塑性捲縮繊維自体が第三成分の共重合などにより内部まで親水性化されているものは、シート全体がウェットな状態となり易く、シート表面のドライタッチ感が得にくいので好ましくない。
【0012】
該親水性油剤は、通常油剤固形分5〜40%の水性エマルジョンで準備されるが、繊維に対する油剤成分の付着保持性を高めるために前記エマルジョン型処理剤中にポリウレタン等の樹脂成分を含有しているものが好ましい。該処理剤はスプレー(シャワー)法、ローラータッチ法、デイップニップ法などの方法により、捲縮が付与されたトウの状態で繊維に付与され、乾燥後、熱処理される。この場合、繊維に対する前記処理剤の付着量は0.1〜0.6質量%になるように処理することが望ましい。なお、該処理後のトウは25〜100mmにカットされて、カード機等を通して本発明のウエブ層として準備される。
【0013】
本発明を構成する吸水性シート材料は、前記のセルロースパルプ層とその片面または両面に、親水性油剤が付着した熱可塑性捲縮繊維を含む繊維ウエブ層を積層して、絡合処理することによって製造することができる。なお、セルロースパルプ層が、ウエブ状である場合には、該セルロースパルプ層の両面に該繊維ウエブを積層して絡合処理することが望ましい。絡合処理は、空気絡合、水流絡合あるいはニードルパンチングなどにより可能であるが、水流絡合処理の場合、パルプなどの微細繊維成分が飛散しにくく、均一でソフトな製品が得られる点からより好ましい。
【0014】
親水性油剤が付着された熱可塑性捲縮繊維を含むウエブ層には該ウエブ層の嵩高性、表面濡れ性を阻害しない範囲で他の繊維を混綿してもよい。例えば、吸水性シート材料の強度向上の目的で分割型極細繊維又は各種の熱融着繊維等を10〜40質量%混綿したり、絡合処理効率を上げる目的でレーヨン繊維を10〜20質量%混綿したりする場合もある。なお、べとつき感を更に少なくするためには、該ウェブ層に、親水性油剤が付着されていない熱可塑性捲縮繊維を含ませることは有効である。得られる吸水性シート材料の嵩高性等の観点から該ウエブ層には親水性油剤が付着した熱可塑性捲縮繊維を50質量%以上含むことが好ましい。
【0015】
本発明を構成する吸水性シート材料における親水性油剤の付着量は、0.01〜0.2質量%であることが重要であり、製品のべとつき感及び風合を損なわず、しかもセルロースパルプ層へ水分を導き、かつセルロースパルプ層で吸水し保持している水分を徐々に熱可塑性捲縮繊維を主成分とするウェブ層に移行させるために、0.01〜0.1質量%が好ましく、さらに好ましくは0.02〜0.08質量%である。親水性油剤の付着量が0.2質量%を超えると、製品シート表面のドライタッチ感が減少し、風合の低下を招く。一方、付着量が0.01質量%未満であると、吸水性が不十分であり本発明の目的が達成されない。
なお、本発明において上記した付着量とするためには、その製造工程、すなわちカーデイング、水流絡合などの工程で該親水性油剤の脱落などを想定し、また、カーデイング工程の通過性を向上させる点からもその固形分付着量は0.1質量%以上、好ましくは0.2〜0.6質量%とすることが望ましい。
【0016】
本発明を構成する吸水性シート材料は、ソフトな風合を有し、表面肌触りが極めて良好である。
【0017】
【実施例】
以下、本発明を実施例によりさらに具体的に説明するが、本発明はこれら実施例に何ら制限されるものではない。なお、本発明における各物性値は以下の方法により測定した。
【0018】
(厚み)
厚み測定機(大栄科学精器製作所製FS60―DS)を用いて、12g/cmの荷重下における厚みを測定した。
【0019】
(肌触り感)
吸水性シートの質量に対して200%の水分を吸水させサンプルとした。サンプルの表面に手の甲を当てて滑らせ、その時の感触を表1の5段階で評価した。なお、モニター合計10人にそれぞれ評価してもらい、評価点の平均値を求めた。
【0020】
(風合)
吸水性シートの質量に対して200%の水分を吸水させサンプルとした。サンプルを手で握り、その時の感触を表1の5段階で評価した。なお、モニター合計10人にそれぞれ評価してもらい、評価点の平均値を求めた。
【0021】
【表1】

Figure 0004212948
【0022】
(熱可塑性捲縮繊維への親水性油剤付着量)
吸水性シートより熱可塑性捲縮繊維のみを取り出し、エタノール/n−ヘキサン混合溶媒(体積比1:1)中で10分間還流抽出を2回繰り返して行った。その後、抽出液を蒸発乾固して残渣の質量を測定し付着量を求めた。
【0023】
実施例1
パルプシート(丸三製紙社製、目付17g/m)をセルロースパルプ層とし、その両面にポリエステル樹脂オリゴマーを主成分とする親水性油剤(高松油脂社製、吸水SR加工剤SR−1720)が0.4質量%付着したポリエステル捲縮繊維(繊度2.2dtex、繊維長51mm、捲縮数12個/25mm)100質量%からなる目付15g/mのカードウエブを積層した。次いで該積層体を孔径0.1mmのオリフィスが0.6mm間隔で設けられているノズルを用いて、表裏面をそれぞれ20kg/cm、30kg/cm、50kg/cmの水圧下で3回ずつ、速度10m/分で水流絡合処理を施し、乾燥して本発明の吸水性シート材料を得た。なお、親水性油剤処理は、ポリエステル捲縮繊維トウに対してシャワー方式により行い、90℃で乾燥後、150℃で10分間熱処理し、前記繊維長にカットしてシート製造に供した。
結果を表2に示す。
【0024】
実施例2
パルプシート(丸三製紙社製、目付17g/m)をセルロースパルプ層とし、その両面に実施例1で使用した親水性油剤を付着させたポリエステル捲縮繊維50質量%と繊度1.6dtex、繊維長51mmのポリエステル繊維(クラレ社製)50質量%からなる目付15g/mのカードウエブを積層したこと以外は実施例1と同様にして吸水性シート材料を得た。(表2)
【0025】
比較例1
パルプシート(丸三製紙社製、目付17g/m)をセルロースパルプ層とし、実施例1で使用した親水性油剤を付着させたポリエステル捲縮繊維20質量%と実施例2で使用したポリエステル繊維80質量%からなる目付15g/mの2枚のカードウエブを積層したこと以外は実施例1と同様にして吸水性シート材料を得た。(表2)
【0026】
比較例2
パルプシート(丸三製紙社製、目付17g/m)をセルロースパルプ層とし、その両面に実施例2で使用したポリエステル繊維100質量%からなる目付15g/mのカードウエブを積層し、実施例1と同様の処理を施し、吸水性シート材料を得た。(表2)
【0027】
比較例3
パルプシート(丸三製紙社製、目付17g/m)をセルロースパルプ層とし、その両面にレーヨン繊維(ダイワボウレーヨン社製、繊度1.7dtex、繊維長40mm)100質量%からなる目付15g/mのカードウエブを積層したこと以外は、実施例1と同様の処理を施し、吸水性シート材料を得た。(表2)
【0028】
【表2】
Figure 0004212948
【0029】
本発明の吸水性シート材料はウェット状態であっても、ベタツキ感がなく、サラリ感を有し、肌触り感も優れている。さらに、風合はしなやかであり、ウェットワイパーや使い捨ておしぼり等に好適なものであった。比較例1及び比較例2の吸水性シート材料は、サラリ感はあるもののシート表面がほとんど乾燥した状態であり、前述用途には適していないものであった。また、比較例3の吸水性シート材料はベタツキ感が強く、硬い感触があり、前述用途には適していないものであった。
【0030】
【発明の効果】
本発明により、シート全体での十分な吸水性、保水性を保持しつつ、ソフトな風合を有し、湿潤時のへたりが少なく、取り扱い性に優れた吸水性シート材料を得ることができる。また、対人用ワイパーとして使用した際には、べとつき感が少なく、肌触りも優れたものである。かかる吸水性シート材料は、ウエットティッシュ、ウェットワイパー等にも適している。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a personal wiper using a water absorbent sheet material. More specifically, the present invention relates to a human wiper that is rich in water absorption and water retention, has a bulky and soft texture, and has little stickiness. About.
[0002]
[Prior art]
Conventionally, as a wet wiper or a disposable hand towel, many non-woven fabrics obtained by subjecting a sheet mainly composed of hydrophilic fibers such as cellulose pulp and rayon to high-pressure water flow treatment have been used. However, when these non-woven fabrics are used as interpersonal wipers, there are problems such as a sticky feel on the surface.
[0003]
In order to solve such problems, non-woven fabric using durable hydrophilic fibers containing a specific ester compound as the sheath component of the core-sheath type composite fiber (see Patent Document 1) and polyester fiber specific weight There has been proposed a nonwoven fabric (see Patent Document 2) using such fibers by impregnating a combined dispersion to impart hydrophilicity. However, when these non-woven fabrics are used as interpersonal wipers, it has been pointed out that they have a sticky feel on the surface.
[0004]
[Patent Document 1]
JP 2002-146630 A [Patent Document 2]
Japanese Patent Laid-Open No. 2001-303450
[Problems to be solved by the invention]
The present invention is intended to solve the above problems, and an object, there is voluminous even when wet, have a soft texture, not a touch surface skin is sticky absorbent sheet material An object is to provide a wiper for a person using .
[0006]
[Means for Solving the Problems]
That is, the present invention is, on at least one surface of the cellulose pulp layers, obtained by using the absorbent sheet material web layers are stacked comprising a thermoplastic crimped fibers hydrophilic oil agent adheres 0.01 to 0.2 wt% Interpersonal wiper .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Cellulose pulp layers the present invention to configure is generally a usable kraft pulp used in the tissue or the like, does not include the adhesive component to facilitate more entangled and later web layer, or comprise A small amount of pulp sheet, if any, is preferably used.
In the present invention, in order to retain sufficient water absorption or water retention products, the basis weight of the cellulose pulp layer is preferably 10 g / m 2 or more, more preferably 10 to 50 g / m 2.
[0008]
The material of the thermoplastic crimped fiber used for the web layer constituting the present invention includes a polyester polymer, a polyolefin polymer, a polyamide polymer, a polystyrene polymer, a polyacrylonitrile polymer, and polyvinyl alcohol. Examples thereof include, but are not limited to, polymers, ethylene-vinyl alcohol copolymers, polylactic acid polymers and the like, and one kind or two or more kinds of polymers can be used.
[0009]
Among them, in the present invention, it is preferable that the fiber has an official moisture content of 1% or less and does not cause a decrease in strength or bulkiness when wet. Specific examples include polyester fibers and polypropylene fibers, among which polyester fibers are particularly preferable.
Further, the thermoplastic crimped fiber may be a fiber made of the above-mentioned polymer alone or a composite fiber using two or more kinds of polymers. As a composite form, a core-sheath type, a side-by-side type, a random composite type, a multi-layer bonding type, or the like can be used. On the other hand, the cross-sectional shapes of these fibers can be various cross-sectional shapes such as a solid cross-sectional shape and an irregular cross-sectional shape.
As the thermoplastic crimped fiber, it is preferable to use a fiber having a single fiber fineness of 0.6 to 5.5 dtex, but by using an ultrafine fiber having a fiber density of less than 0.6 dtex, the texture and the strength of the water absorbent sheet can be improved. I can expect. On the other hand, if a fiber having a relatively large fineness of several dtex or more or a modified cross-section fiber is used, the bulkiness of the sheet material of the present invention can be enhanced. That is, in the present invention, the fineness and the cross-sectional shape may be appropriately selected according to the intended use.
[0010]
The thermoplastic crimped fiber is prepared as a crimped short fiber, and is used for producing the water-absorbent sheet material of the present invention as a web layer formed by a card web, a random web or the like. When considering the ease of forming a card web or a nonwoven fabric, the fiber length is suitably 25 to 100 mm, more preferably 30 to 60 mm. Moreover, 10-20 pieces / 25mm is preferable and 12-18 pieces / 25mm is more preferable. The crimp rate is preferably 12 to 18%, and more preferably 13 to 16%.
The weight of the web layer (the weight of the web on one side when used on both sides) is suitably 8 to 50 g / m 2 . The basis weight of the web is preferably smaller than the basis weight of the pulp layer. In the opposite case, the weight and thickness of the final product sheet increase without increasing the water absorption amount of the entire sheet, and the desired wiper and towel Depending on the application, it may be difficult to suit.
[0011]
The present invention is characterized in that the web layer includes thermoplastic crimped fibers to which a hydrophilic oil agent is adhered. As such a hydrophilic oil agent, a sulfate ester type anionic surfactant such as low molecular weight polyester resin, phosphate ester alkali metal salt, acrylate ester copolymer resin, etc. can be used. Resin is effective. Furthermore, in order to improve the adhesion durability to the fibers, the above-described hydrophilic oil agent and a resin component such as polyurethane and acrylic may be used in combination.
On the other hand, it is not preferable that the thermoplastic crimped fiber itself is made hydrophilic to the inside by copolymerization of the third component or the like because the entire sheet tends to be in a wet state and it is difficult to obtain a dry touch feeling on the sheet surface.
[0012]
The hydrophilic oil agent is usually prepared as an aqueous emulsion having an oil agent solid content of 5 to 40%, but contains a resin component such as polyurethane in the emulsion-type treatment agent in order to enhance the adhesion retention of the oil agent component to the fiber. Are preferred. The treatment agent is applied to the fiber in a crimped tow state by a spray (shower) method, a roller touch method, a dip nip method, or the like, dried and then heat-treated. In this case, it is desirable to perform the treatment so that the amount of the treatment agent attached to the fibers is 0.1 to 0.6% by mass. The tow after the treatment is cut into 25 to 100 mm and prepared as a web layer of the present invention through a card machine or the like.
[0013]
The water-absorbent sheet material constituting the present invention is obtained by laminating a fiber web layer containing a thermoplastic crimped fiber with a hydrophilic oil agent attached to one or both surfaces of the cellulose pulp layer and performing an entanglement treatment. Can be manufactured. In addition, when a cellulose pulp layer is a web form, it is desirable to laminate | stack this fiber web on both surfaces of this cellulose pulp layer, and to perform an entanglement process. The entanglement treatment is possible by air entanglement, water entanglement, needle punching, etc., but in the case of water entanglement treatment, fine fiber components such as pulp are not easily scattered, and a uniform and soft product can be obtained. More preferred.
[0014]
The web layer containing the thermoplastic crimped fiber to which the hydrophilic oil agent is adhered may be blended with other fibers as long as the bulkiness and surface wettability of the web layer are not impaired. For example, 10-40% by mass of split ultrafine fibers or various heat-sealing fibers for the purpose of improving the strength of the water-absorbent sheet material, or 10-20% by mass of rayon fibers for the purpose of increasing the entanglement efficiency. In some cases, it may be mixed. In order to further reduce the feeling of stickiness, it is effective to include thermoplastic crimped fibers to which the hydrophilic oil agent is not attached in the web layer. From the viewpoint of the bulkiness of the resulting water-absorbent sheet material, the web layer preferably contains 50% by mass or more of thermoplastic crimped fibers to which a hydrophilic oil agent is adhered.
[0015]
The adhesion amount of the hydrophilic oil agent in the water-absorbing sheet material constituting the present invention is important to be 0.01 to 0.2% by mass, and does not impair the stickiness and texture of the product, and also the cellulose pulp layer In order to transfer moisture to the web layer mainly composed of thermoplastic crimped fibers, 0.01 to 0.1% by mass is preferable. More preferably, it is 0.02-0.08 mass%. When the adhesion amount of the hydrophilic oil agent exceeds 0.2% by mass, the dry touch feeling on the surface of the product sheet is reduced and the texture is lowered. On the other hand, if the adhesion amount is less than 0.01% by mass, the water absorption is insufficient and the object of the present invention is not achieved.
In order to obtain the above-mentioned adhesion amount in the present invention, it is assumed that the hydrophilic oil agent is removed in the manufacturing process, that is, carding, water entanglement, and the like, and the passability of the carding process is improved. In view of the point, the solid content adhesion amount is 0.1% by mass or more, preferably 0.2 to 0.6% by mass.
[0016]
The water-absorbent sheet material constituting the present invention has a soft texture and extremely good surface texture .
[0017]
【Example】
EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to these examples. In addition, each physical property value in this invention was measured with the following method.
[0018]
(Thickness)
The thickness under a load of 12 g / cm 2 was measured using a thickness measuring device (FS60-DS manufactured by Daiei Scientific Instruments).
[0019]
(Feeling of touch)
A sample was prepared by absorbing 200% of water with respect to the mass of the water-absorbent sheet. The back of the hand was placed on the surface of the sample and slid, and the feel at that time was evaluated in five grades in Table 1. In addition, a total of 10 monitors evaluated each, and the average value of evaluation points was obtained.
[0020]
(Feel)
A sample was prepared by absorbing 200% of water with respect to the mass of the water-absorbent sheet. The sample was gripped by hand, and the feel at that time was evaluated according to the five levels shown in Table 1. In addition, a total of 10 monitors evaluated each, and the average value of evaluation points was obtained.
[0021]
[Table 1]
Figure 0004212948
[0022]
(Amount of hydrophilic oil attached to thermoplastic crimped fiber)
Only the thermoplastic crimped fiber was taken out from the water-absorbent sheet, and reflux extraction was repeated twice for 10 minutes in an ethanol / n-hexane mixed solvent (volume ratio 1: 1). Thereafter, the extract was evaporated to dryness, and the mass of the residue was measured to determine the amount of adhesion.
[0023]
Example 1
A pulp sheet (manufactured by Marusan Paper Co., Ltd., 17 g / m 2 per unit area) is used as a cellulose pulp layer, and hydrophilic oil agent (manufactured by Takamatsu Yushi Co., Ltd., water-absorbing SR processing agent SR-1720) is 0 on both surfaces A card web having a basis weight of 15 g / m 2 composed of 100% by mass of polyester crimped fibers (fineness 2.2 dtex, fiber length 51 mm, number of crimps 12/25 mm) adhered to 4% by mass was laminated. Then using a nozzle that the laminate orifices having a pore diameter of 0.1mm are provided at 0.6mm intervals, front and rear surfaces respectively 20kg / cm 2, 30kg / cm 2, 50kg / cm 3 times 2 under pressure The water entanglement process was performed at a speed of 10 m / min and dried to obtain the water-absorbent sheet material of the present invention. The hydrophilic oil agent treatment was performed on the polyester crimped fiber tow by a shower method, dried at 90 ° C., heat-treated at 150 ° C. for 10 minutes, cut into the fiber length, and used for sheet production.
The results are shown in Table 2.
[0024]
Example 2
A pulp sheet (manufactured by Marusan Paper Co., Ltd., basis weight 17 g / m 2 ) was used as a cellulose pulp layer, and 50% by mass of a polyester crimped fiber having a hydrophilic oil used in Example 1 adhered to both sides thereof, a fineness of 1.6 dtex, and a fiber A water-absorbent sheet material was obtained in the same manner as in Example 1 except that a card web having a basis weight of 15 g / m 2 composed of 50% by mass of a polyester fiber having a length of 51 mm (manufactured by Kuraray Co., Ltd.) was laminated. (Table 2)
[0025]
Comparative Example 1
Polyester fiber 80 used in Example 2 and 20% by mass of polyester crimped fiber to which a hydrophilic oil agent used in Example 1 was attached using a pulp sheet (manufactured by Marusan Paper Co., Ltd., basis weight 17 g / m 2 ) as a cellulose pulp layer. A water-absorbent sheet material was obtained in the same manner as in Example 1 except that two card webs having a basis weight of 15 g / m 2 consisting of mass% were laminated. (Table 2)
[0026]
Comparative Example 2
A pulp sheet (manufactured by Marusan Paper Co., Ltd., basis weight 17 g / m 2 ) was used as a cellulose pulp layer, and a card web having a basis weight of 15 g / m 2 consisting of 100% by mass of polyester fiber used in Example 2 was laminated on both sides. 1 was applied to obtain a water-absorbent sheet material. (Table 2)
[0027]
Comparative Example 3
A pulp sheet (manufactured by Marusan Paper Co., Ltd., basis weight 17 g / m 2 ) is used as a cellulose pulp layer, and a basis weight of 15 g / m 2 consisting of 100% by mass of rayon fibers (Daiwabo Rayon Co., Ltd., fineness 1.7 dtex, fiber length 40 mm) is provided on both sides thereof. Except having laminated | stacked this card web, the process similar to Example 1 was performed and the water absorbing sheet material was obtained. (Table 2)
[0028]
[Table 2]
Figure 0004212948
[0029]
Even when the water-absorbent sheet material of the present invention is in a wet state, it does not have a sticky feeling, has a smooth feeling, and has an excellent touch feeling. Furthermore, the texture is supple and suitable for wet wipers, disposable towels, and the like. The water-absorbent sheet materials of Comparative Examples 1 and 2 had a feeling of smoothness, but the sheet surface was almost dry, and were not suitable for the above-mentioned use. Further, the water-absorbent sheet material of Comparative Example 3 had a strong stickiness and a hard feel, and was not suitable for the above-mentioned use.
[0030]
【The invention's effect】
According to the present invention, it is possible to obtain a water-absorbent sheet material having a soft feel, having little softness when wet, and having excellent handleability while maintaining sufficient water absorption and water retention throughout the sheet. . In addition, when used as a personal wiper, it is less sticky and has an excellent touch. Such a water-absorbent sheet material is also suitable for wet tissues, wet wipers and the like.

Claims (5)

セルロースパルプ層の少なくとも片面に、親水性油剤が0.01〜0.2質量%付着した熱可塑性捲縮繊維を含むウエブ層が積層されてなる吸水性シート材料を用いてなる対人用ワイパーAn interpersonal wiper using a water-absorbent sheet material in which a web layer containing a thermoplastic crimped fiber having a hydrophilic oil agent of 0.01 to 0.2% by mass attached to at least one surface of a cellulose pulp layer is laminated. 該ウエブ層が、親水性油剤が付着した熱可塑性捲縮繊維を50質量%以上含む請求項1記載の吸水性シート材料を用いてなる対人用ワイパーThe interpersonal wiper using the water-absorbent sheet material according to claim 1, wherein the web layer contains 50% by mass or more of thermoplastic crimped fibers to which a hydrophilic oil is adhered. 該セルロースパルプ層の目付が10〜50g/m2である請求項1または2に記載の吸水性シート材料を用いてなる対人用ワイパーThe interpersonal wiper using the water absorbent sheet material according to claim 1 or 2, wherein the basis weight of the cellulose pulp layer is 10 to 50 g / m2. 該熱可塑性捲縮繊維がポリエステル繊維である請求項1〜3いずれか1項に記載の吸水性シート材料を用いてなる対人用ワイパーThe interpersonal wiper using the water absorbent sheet material according to any one of claims 1 to 3, wherein the thermoplastic crimped fiber is a polyester fiber. 該親水性油剤がグリコール系ポリエステル樹脂を主成分とする油剤である請求項1〜4のいずれか1項に記載の吸水性シート材料を用いてなる対人用ワイパーThe human wiper using the water-absorbent sheet material according to any one of claims 1 to 4, wherein the hydrophilic oil agent is an oil agent mainly composed of a glycol polyester resin.
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