JP2005146451A - Pattern-manifested wet tissue - Google Patents

Pattern-manifested wet tissue Download PDF

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JP2005146451A
JP2005146451A JP2003383956A JP2003383956A JP2005146451A JP 2005146451 A JP2005146451 A JP 2005146451A JP 2003383956 A JP2003383956 A JP 2003383956A JP 2003383956 A JP2003383956 A JP 2003383956A JP 2005146451 A JP2005146451 A JP 2005146451A
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fiber layer
pattern
fiber
wet tissue
sheet base
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JP4454289B2 (en
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Haruji Onishi
春二 大西
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Meisei Sansho Co Ltd
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Meisei Sansho Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a wet tissue emboss-patterned on a sheet base, ensuring a pattern to be continuously manifested in a clear-cut manner over a long period when impregnated with a liquid. <P>SOLUTION: The wet tissue is such that the sheet base 1 to be impregnated with a liquid comprises a nonwoven fabric obtained by entangling liquid-absorbing fibers (pulp fibers) with thermofusible hydrophobic fibers, and by embossing the sheet base 1 under hot-press conditions, a series of recesses 2 and numerous projections 3 surrounded by the recesses 2 are formed on the upper surface of the sheet base 1. In this wet tissue, the fiber layer part A in between the flat underside 1a of the sheet base 1 and the substantially flat inner bottom surface 5 of the recesses 2 is maintained in a highly densely compressed condition owing to the fusion of the hydrophobic fibers. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、液を含浸するシート基材にエンボス柄模様が現出するウェットティッシュに関する。   The present invention relates to a wet tissue in which an embossed pattern appears on a sheet substrate impregnated with a liquid.

紙ナプキンやティッシュ等の分野において、パルプなどの吸液性繊維からなる不織布の表面に、エンボス加工により凹凸を形成することは、例えば特許文献１や特許文献２などに公知である。   In the field of paper napkins, tissues, and the like, it is known, for example, in Patent Document 1 and Patent Document 2 to form irregularities on the surface of a nonwoven fabric made of liquid-absorbing fibers such as pulp by embossing.

特表２００３−５００５７１号公報（図１）Japanese translation of PCT publication No. 2003-500571 (FIG. 1) 特開２０００−６２０５２号公報（図１）Japanese Unexamined Patent Publication No. 2000-62052 (FIG. 1)

本発明者は、凹凸模様を入れた不織布に、薬剤溶液などを含浸させて、ウェットティッシュをつくることを試みた。しかし、不織布に液を含浸させると、不織布を構成するパルプ繊維が液を吸収して膨張復元する。その結果、凹凸形態が失われて、柄模様が消えてしまうことがわかった。   The inventor tried to make a wet tissue by impregnating a non-woven fabric with an uneven pattern with a drug solution or the like. However, when the nonwoven fabric is impregnated with the liquid, the pulp fibers constituting the nonwoven fabric absorb the liquid and expand and restore. As a result, it was found that the concavo-convex form was lost and the design pattern disappeared.

そこで本発明の目的は、不織布製のシート基材に液を含浸させても、シート基材にエンボス加工した凹凸模様が長期にわたって安定的に維持できるウェットティッシュを提供することにある。本発明の目的は、シート基材の外表面に、独立した多数の島柄模様をくっきりと現出させることにより、ウェットティッシュの商品イメージの向上と、購買者に対する訴求効果の向上とを期すにある。   Accordingly, an object of the present invention is to provide a wet tissue that can stably maintain a concavo-convex pattern embossed on a sheet base material for a long period of time even when a non-woven sheet base material is impregnated with a liquid. The object of the present invention is to improve the product image of wet tissue and improve the appeal effect to buyers by clearly displaying many independent island patterns on the outer surface of the sheet base material. is there.

本発明は、図１および図２に示すごとく、液を含浸するシート基材１に、柄模様を現出させるためのエンボス加工が施されたウェットティッシュを対象とする。そのシート基材１は、吸液性繊維に疎水性繊維を絡ませて、全体にわたって実質的に均一な坪量に形成された不織布からなる。   As shown in FIGS. 1 and 2, the present invention is directed to a wet tissue in which a sheet base material 1 impregnated with a liquid is embossed to make a pattern appear. The sheet substrate 1 is made of a nonwoven fabric having hydrophobic fibers entangled with liquid-absorbing fibers and having a substantially uniform basis weight throughout.

このシート基材１をエンボス加工することにより、図２に示すごとく、シート基材１の上面に、一連につながる凹部２と、この凹部２で外周囲が囲撓された多数の凸部３とを形成する。そして、図３に示すごとく、凹部２の実質的に平坦な内底面５に臨む繊維層部分Ａが、各凸部３の実質的に平坦な頂上面６に臨む繊維層部分Ｂよりも高密度に圧縮されており、凹部２の繊維部分Ａにおける容積当たりの吸液率が、各凸部３の繊維層部分Ｂにおける容積当たりの吸液率よりも大きくなるように設定されていることを特徴とする。凹部２の繊維層部分Ａを高密度に圧縮した状態に維持する手段としては、バインダーなどによってもよい。   By embossing the sheet base material 1, as shown in FIG. 2, a series of concave portions 2 connected to the upper surface of the sheet base material 1, and a large number of convex portions 3 whose outer periphery is surrounded by the concave portions 2. Form. As shown in FIG. 3, the fiber layer portion A facing the substantially flat inner bottom surface 5 of the concave portion 2 has a higher density than the fiber layer portion B facing the substantially flat top surface 6 of each convex portion 3. And the liquid absorption rate per volume in the fiber portion A of the concave portion 2 is set to be larger than the liquid absorption rate per volume in the fiber layer portion B of each convex portion 3. And As a means for maintaining the fiber layer portion A of the concave portion 2 in a highly compressed state, a binder or the like may be used.

具体的には、シート基材１の平坦な下面１ａと、前記凹部２の実質的に平坦な内底面５との間の繊維層部分Ａが、シート基材１の平坦な下面１ａと、各凸部３の実質的に平坦な頂上面６との間の繊維層部分Ｂよりも高密度に圧縮された状態に維持されている。   Specifically, the fiber layer portion A between the flat lower surface 1a of the sheet base material 1 and the substantially flat inner bottom surface 5 of the concave portion 2 includes the flat lower surface 1a of the sheet base material 1, It is maintained in a compressed state at a higher density than the fiber layer portion B between the substantially flat top surface 6 of the convex portion 3.

すなわち、シート基材１は、凹部２の内底面５に臨む繊維層部分Ａが圧縮されて繊維密度が高い状態に維持されており、これとの比較において各凸部３を構成する繊維層部分Ｂが実質的に圧縮されないで繊維密度が低くなっている。このように、凹部２の繊維層部分Ａの密度が高く設定されていると、吸液性に優れたものとなるが、そこでの見掛け密度は0.７を越えると急激に吸液性を失うので0.４〜0.６にすることが望まれる。   That is, in the sheet base material 1, the fiber layer portion A facing the inner bottom surface 5 of the concave portion 2 is compressed and maintained in a high fiber density state. B is not substantially compressed and the fiber density is low. As described above, when the density of the fiber layer portion A of the concave portion 2 is set high, the liquid absorbency is excellent. However, when the apparent density exceeds 0.7, the liquid absorbency is rapidly lost. Therefore, it is desired to be 0.4 to 0.6.

シート基材１の全厚すなわち各凸部３の繊維層部分Ｂの厚さＴ１は、1.０〜3.０mmに、凹部２の繊維層部分Ａの厚さＴ２は、前記厚さＴ１の２／５〜４／５にそれぞれ設定し、シート基材１の坪量は、６０〜３００ｇ／ｍ2 に設定し、凹部２の繊維層部分Ａにおける容積当たりの吸液率は、各凸部３の繊維層部分Ｂにおける容積当たりの吸液量の1.１〜2.０倍に設定することができる。 The total thickness of the sheet substrate 1, that is, the thickness T1 of the fiber layer portion B of each convex portion 3 is 1.0 to 3.0 mm, and the thickness T2 of the fiber layer portion A of the concave portion 2 is the thickness T1. The basis weight of the sheet substrate 1 is set to 60 to 300 g / m 2, and the liquid absorption rate per volume in the fiber layer portion A of the concave portion 2 is set to each convex portion. It can be set to 1.1 to 2.0 times the liquid absorption amount per volume in the three fiber layer portions B.

各凸部３の外周囲が凹部２で囲撓されているとは、各凸部３が独立した島模様になっていることを意味する。したがって、凹部２の内底面５はシート基材１の外周縁部分を除き一連につながっていることになる。この凸部３の島柄模様としては、図１に示すような形態に限られず、花柄模様やキャラクター模様などであってもよい。   That the outer periphery of each convex part 3 is surrounded by the concave part 2 means that each convex part 3 has an independent island pattern. Accordingly, the inner bottom surface 5 of the recess 2 is connected in series except for the outer peripheral edge portion of the sheet base material 1. The island pattern of the convex portion 3 is not limited to the form shown in FIG. 1, but may be a floral pattern or a character pattern.

吸液性繊維としては、安価に量産できるパルプ繊維が用いて好適であるが、コットンやレーヨンなどのセルロース繊維もパルプ繊維と共に併用できる。パルプ繊維は、シート基材１中に４５〜８５重量％混合し、他は疎水性繊維とすることができる。ここでのパルプ繊維とは、原料木材を砕いた砕木パルプや、これを化学薬品で処理して木材中のセルロース分を抽出した化学パルプなどからなる繊維を意味する。   As the liquid-absorbent fiber, pulp fiber that can be mass-produced at low cost is suitable, and cellulose fibers such as cotton and rayon can be used together with the pulp fiber. Pulp fibers can be mixed in the sheet base 1 by 45 to 85% by weight, and the others can be made into hydrophobic fibers. The pulp fiber here means a fiber made of crushed wood pulp obtained by pulverizing raw wood, chemical pulp obtained by treating this with a chemical and extracting the cellulose content in the wood, and the like.

疎水性繊維は、これが熱融着性を有するとき、加熱下でエンボス加工すると、前記凹部２に臨む繊維層部分Ａを熱融着作用で圧縮状態に維持する。かかる疎水性繊維としては、ポリエステルやポリプロピレンなどの繊維を挙げることができる。疎水性繊維は、極細であれば表面積が大になって液付着性を図れるので、シート基材１これ全体の吸液性を阻害することにはならない。   When the hydrophobic fiber is heat-fusible and embossed under heat, the fiber layer portion A facing the recess 2 is maintained in a compressed state by the heat-sealing action. Examples of such hydrophobic fibers include fibers such as polyester and polypropylene. If the hydrophobic fiber is very fine, the surface area becomes large and the liquid adhesion can be achieved. Therefore, the liquid absorption property of the entire sheet substrate 1 is not hindered.

疎水性繊維には、芯鞘繊維を用いることができる。その場合、芯部分がポリエチレンテレフタレートであって鞘部分がポリエチレンである第１の芯鞘繊維と、芯部分がポリプロピレンであって鞘部分がポリエチレンである第２の芯鞘繊維とを単独で、又は併用して用いることができる。   A core-sheath fiber can be used for the hydrophobic fiber. In that case, a first core-sheath fiber in which the core part is polyethylene terephthalate and the sheath part is polyethylene, and a second core-sheath fiber in which the core part is polypropylene and the sheath part is polyethylene alone, or It can be used in combination.

芯鞘繊維において、鞘部分がポリエチレンであれば、低温下での先の熱融着性に有利である。その際に、芯部分がポリエチレンテレフタレートであると、剛性が得られシート基材１に液が含浸する空間をつくるに有利となる。芯部分がポリプロピレンであると、柔軟性が得られる。   In the core-sheath fiber, if the sheath part is polyethylene, it is advantageous for the heat-sealing property at a low temperature. At that time, if the core portion is made of polyethylene terephthalate, rigidity is obtained, which is advantageous for creating a space in which the sheet substrate 1 is impregnated with the liquid. A softness | flexibility is acquired as a core part is a polypropylene.

また、請求項２記載の本発明は、請求項１記載のウェットティッシュにおいて、図４に示すごとくシート基材１の上側表面に、コットンに熱融着性繊維を含ませた薄厚の表面繊維層７が一体に積層形成されており、シート基材１が表面繊維層７と共にエンボス加工されている。ここでのコットン表面繊維層７を構成する熱融着性繊維としては、先の疎水性繊維とくに芯鞘繊維が用いて好適である。   Further, the present invention as defined in claim 2 is a wet tissue according to claim 1, wherein the upper surface of the sheet substrate 1 is a thin surface fiber layer in which a heat-fusible fiber is contained in cotton, as shown in FIG. 7 is integrally laminated, and the sheet substrate 1 is embossed together with the surface fiber layer 7. As the heat-fusible fiber constituting the cotton surface fiber layer 7 here, the above-mentioned hydrophobic fiber, particularly the core-sheath fiber, is preferably used.

シート基材１に表面繊維層７を張り合わせる方法としては、機械結合、ニードルパンチ、水流交絡法、エアーレイ交絡法などの公知のウェブの結合方法を挙げることができる。接着剤により両者を張り合わせてもよい。   Examples of the method for bonding the surface fiber layer 7 to the sheet substrate 1 include known web bonding methods such as mechanical bonding, needle punching, hydroentanglement method, and air ray entanglement method. Both may be bonded together with an adhesive.

シート基材１に含ませるべき液は、水これ単独でもよいが、水にエタノールなどの各種薬剤を含む水溶液が相当する。液が着色されていると更に好ましい。   The liquid to be contained in the sheet substrate 1 may be water alone, but corresponds to an aqueous solution containing various chemicals such as ethanol in water. More preferably, the liquid is colored.

請求項１および請求項２記載の本発明に係るウェットティッシュによれば、シート基材１に液を含浸させたとき、パルプ繊維などの吸液性繊維は液を含んで膨潤するが、疎水性繊維は膨潤しない。そのうえで、凹部２の繊維層部分Ａは、エンボス加工時に各凸部３の繊維層部分Ｂよりも高密度に圧縮された状態に維持されている。しかも、各凸部３は外周囲が凹部２で取り囲まれた状態にある。したがって、シート基材１に液を含浸させても、凹部２のとくに内底面部分では、疎水性繊維を介在させたことにより膨潤して復元せず、全体として凹凸形態が良好に維持される。   According to the wet tissue of the first and second aspects of the present invention, when the sheet base material 1 is impregnated with the liquid, the absorbent fibers such as pulp fibers swell with the liquid, but are hydrophobic. The fiber does not swell. In addition, the fiber layer portion A of the concave portion 2 is maintained in a state compressed at a higher density than the fiber layer portion B of each convex portion 3 during embossing. Moreover, each convex portion 3 is in a state where the outer periphery is surrounded by the concave portion 2. Therefore, even if the sheet base material 1 is impregnated with the liquid, the concave and convex portions, particularly the inner bottom surface portion, are not swelled and restored by interposing the hydrophobic fibers, and the overall uneven shape is maintained well.

その際、凹部２に臨む高密度の繊維層部分Ａは、各凸部３を構成する繊維層部分Ｂよりも、容積当たりの吸液率（吸液量）が大きい。すなわち、各凸部３の繊維層部分Ｂは、もともと繊維密度が粗く、疎水性繊維が空気の侵入空間を確保した状態にあり、該当部分Ｂに液が侵入するとき空気を大量に抱き込み、各凸部３は白っぽく光って見える。逆に、凹部２の繊維層部分Ａは、吸液性繊維どうしの密着性が高くなっているので、吸液性繊維に液がよく浸透して行き、空気の抱き込み量が少なく、その分だけ単位容積当たりの吸液量が大になる。疎水性繊維は、かかるメカニズムを積極的に果たすように作用する。現実の使用に際しては、各凸部３が凹部２よりも多くの水分を蒸発しやすいので、この点でも各各凸部３が時間の経過とともに更に白っぽくなって行く。その結果、白っぽく見える凸部３に対して、凹部２が白灰色寄りに見えることになり凹部２を下地として各凸部３が独立した白っぽい島模様になってくっきりと現出する。   At that time, the high-density fiber layer portion A facing the concave portion 2 has a larger liquid absorption rate (liquid absorption amount) per volume than the fiber layer portion B constituting each convex portion 3. That is, the fiber layer portion B of each convex portion 3 is originally in a state where the fiber density is coarse and the hydrophobic fibers ensure an air intrusion space, and when the liquid enters the portion B, a large amount of air is embraced, Each convex part 3 appears to shine whitish. On the contrary, the fiber layer portion A of the concave portion 2 has high adhesion between the liquid absorbent fibers, so that the liquid penetrates the liquid absorbent fibers well, and the amount of air entrainment is small. Only the amount of liquid absorption per unit volume becomes large. Hydrophobic fibers act to actively fulfill such a mechanism. In actual use, each convex portion 3 tends to evaporate more water than the concave portion 2, so that each convex portion 3 also becomes whitish with time. As a result, with respect to the convex portion 3 that looks whitish, the concave portion 2 appears closer to white gray, and each convex portion 3 becomes an independent whitish island pattern with the concave portion 2 as a base, and appears clearly.

請求項３記載の本発明に係るウェットティッシュによれば、シート基材１の表面繊維層７が、吸液性および拭き取り性に優れるコットンからなるので、高級感を出せて使い勝手が良い。コットンを含む表面繊維層７は、薄くしてあるので製造コストを安価に抑えることができる。この表面繊維層７は、前記凹部２の外表面となる部分が熱融着性繊維による熱融着作用で圧縮状態に維持されているので、シート基材１に表面繊維層７を有していても、請求項１、２のウェットティッシュと同様の作用効果を期すことができる。   According to the wet tissue of the third aspect of the present invention, the surface fiber layer 7 of the sheet substrate 1 is made of cotton having excellent liquid absorbency and wiping property, so that a high-class feeling can be given and the usability is good. Since the surface fiber layer 7 containing cotton is thinned, the manufacturing cost can be kept low. The surface fiber layer 7 has the surface fiber layer 7 on the sheet base material 1 because the portion which becomes the outer surface of the concave portion 2 is maintained in a compressed state by the heat fusion action by the heat-fusible fiber. However, the same effect as the wet tissue of Claims 1 and 2 can be expected.

（実施例１） 図１ないし図３は本発明に係るウェットティッシュの実施例１を示す。シート基材１には、吸液性繊維としてパルプ繊維８５重量％と、熱融着性を有する疎水性繊維として1.５〜5.０デニールの極細ポリエチレン繊維１５重量％とを交絡させた不織布を用いた。この不織布製のシート基材１は、全体にわたって均一な坪量（目付）になるように形成されている。 Example 1 FIGS. 1 to 3 show Example 1 of a wet tissue according to the present invention. The sheet base material 1 is a non-woven fabric in which 85% by weight of pulp fibers as liquid-absorbent fibers and 15% by weight of ultrafine polyethylene fibers of 1.5 to 5.0 deniers as hydrophobic fibers having heat-fusibility are entangled. Was used. The nonwoven fabric sheet base material 1 is formed so as to have a uniform basis weight (weight per unit area).

このシート基材１を加熱加圧下でエンボス加工し、シート基材１の下面１ａは平坦面に形成して、シート基材１の上面側には、図２に示すごとく、一連につながる逆台形状の凹部２と、この凹部２で外周囲が囲撓された多数の台形状の凸部３とを形成した。各凸部３は、少なくとも曲線部分を有する独立した形状になっている。   The sheet base material 1 is embossed under heat and pressure, the lower surface 1a of the sheet base material 1 is formed into a flat surface, and on the upper surface side of the sheet base material 1, as shown in FIG. A concave portion 2 having a shape and a number of trapezoidal convex portions 3 whose outer periphery was bent and bent by the concave portion 2 were formed. Each convex portion 3 has an independent shape having at least a curved portion.

前記凹部２の内底面５と、各凸部３の頂上面６とは、それぞれ実質的に平坦面に形成した。これにより、図３に示すごとくシート基材１の平坦下面１ａと、凹部２の内底面５との間の繊維層部分Ａは、シート基材１の平坦下面１ａと、各凸部３の頂上面６との間の繊維層部分Ｂよりも高密度に圧縮された状態にある。そのうえで凹部２の繊維層部分Ａでは、前記疎水性繊維の熱融着作用で圧縮状態に維持されている。   The inner bottom surface 5 of the concave portion 2 and the top surface 6 of each convex portion 3 were formed to be substantially flat surfaces. Thereby, as shown in FIG. 3, the fiber layer portion A between the flat lower surface 1 a of the sheet substrate 1 and the inner bottom surface 5 of the recess 2 is formed on the flat lower surface 1 a of the sheet substrate 1 and the top of each convex portion 3. It is in the state compressed more densely than the fiber layer part B between the surfaces 6. In addition, in the fiber layer portion A of the recess 2, the compressed state is maintained by the heat fusion action of the hydrophobic fibers.

（サンプル１） 具体的には、シート基材１の坪量を１２０ｇ／ｍ2 、シート基材１の全厚すなわち凸部３の繊維層部分Ｂの厚さＴ１を1.４mm、凹部３の繊維層部分Ａの厚さＴ２を0.９１mmとした。 (Sample 1) Specifically, the basis weight of the sheet base material 1 is 120 g / m 2 , the total thickness of the sheet base material 1, that is, the thickness T1 of the fiber layer portion B of the convex portion 3 is 1.4 mm, and the concave portion 3 The thickness T2 of the fiber layer portion A was 0.91 mm.

この実施例１のシート基材１から下記のサンプルを切り出して、水を含ませることにより、吸液量の分布をみた。
サンプル１（坪量１２０ｇ／ｍ2 ）
凸部 凹部
厚さ： 1.４mm 0.９１mm
大きさ： １cm×1cm １cm×1cm
体積 0.１４０cm3 0.０９１cm3
重量： 0.０１２ｇ 0.０１２ｇ
見掛け密度： 0.０８６ 0.１３２
吸水量： 0.０９３ｇ 0.０８８ｇ
１cm3 当たりの吸水量： 約0.６６４ｇ 約0.９６７ｇ The following sample was cut out from the sheet base material 1 of Example 1, and the distribution of liquid absorption was observed by including water.
Sample 1 (basis weight 120g / m 2 )
Convex Concavity Thickness: 1.4mm 0.91mm
Size: 1cm x 1cm 1cm x 1cm
Volume 0.140 cm 3 0.091 cm 3
Weight: 0.012 g 0.012 g
Apparent density: 0.086 0.132
Water absorption: 0.093g 0.088g
Water absorption per 1 cm 3 : About 0.664 g About 0.967 g

このサンプル１での試作実験によれば、実施例１のシート基材１では、凹部２の繊維層部分Ａでの容積当たりの吸液率（量）が凸部３での繊維層部分Ｂのそれよりも大きいことが判る。   According to the prototype experiment with this sample 1, in the sheet base material 1 of Example 1, the liquid absorption rate (amount) per volume in the fiber layer portion A of the concave portion 2 is that of the fiber layer portion B in the convex portion 3. It turns out that it is larger.

（サンプル２） シート基材１の坪量を７５ｇ／ｍ2 、凸部３の繊維層部分Ｂの厚さＴ１を2.０４mm、凹部２の繊維層部分Ａの厚さＴ２を0.９１mmとし、その他の点は実施例１と同様にした。この実施例２のシート基材１から下記のサンプル２を切り出して、水を含ませることにより、吸液量の分布をみた。 (Sample 2) The basis weight of the sheet substrate 1 is 75 g / m 2 , the thickness T1 of the fiber layer portion B of the convex portion 3 is 2.04 mm, and the thickness T2 of the fiber layer portion A of the concave portion 2 is 0.91 mm. The other points were the same as in Example 1. The following sample 2 was cut out from the sheet base material 1 of Example 2 and water was included to observe the distribution of liquid absorption.

サンプル２（坪量７５ｇ／ｍ2 ）
凸部 凹部
厚さ： 2.０４mm 0.８７mm
大きさ： １cm×1cm １cm×1cm
体積 0.２０４cm3 0.０８７cm3
重量： 0.００７５ｇ 0.００７５ｇ
見掛け密度： 0.０３７ 0.０８９
吸水量： 0.１１９ｇ 0.０７３ｇ
１cm3 当たりの吸水量： 約0.５８ｇ 約0.８４ｇ Sample 2 (basis weight 75g / m 2 )
Convex Concavity Thickness: 2.04mm 0.87mm
Size: 1cm x 1cm 1cm x 1cm
Volume 0.204cm 3 0.087cm 3
Weight: 0.0075g 0.0075g
Apparent density: 0.037 0.089
Water absorption: 0.119g 0.073g
Water absorption per 1 cm 3 : About 0.58g About 0.84g

このサンプル２での試作実験によれば、実施例２のシート基材１においても、凹部２での繊維層部分Ａの容積当たりの吸液率（量）が凸部３での繊維層部分Ｂのそれよりも大きいことが判る。   According to the prototype experiment with Sample 2, also in the sheet base material 1 of Example 2, the liquid absorption rate (amount) per volume of the fiber layer portion A in the concave portion 2 is the fiber layer portion B in the convex portion 3. You can see that it is bigger than that.

次に、水６０重量％、エタノール３５重量％、ポリプロピレングリコール５重量％の水溶液にシート基材１をドブ漬けして、シート基材１に液を含浸させた。液を含浸させた状態で長時間放置したが、先の繊維層部分Ａは、液を含むも膨張状態に復元することはなかった。この状態を観察したとき、凹部２の存在部位が各凸部３よりも液をよく含浸し、基本的には白灰色の凹部２を下地にして白っぽい各凸部３が独立した島柄模様でくっきりと浮き上がるように現出した。また、時間の経過とともに、凹部２よりも各凸部３での水分蒸発量が多いところから、各凸部３の島柄模様が更に顕著に現出するものとなった。すなわち、各凸部３の繊維層部分Ｂは、凹部２の繊維層部分Ａよりも空気を大量に抱き込んで白く反射した状態になる。   Next, the sheet base material 1 was immersed in an aqueous solution of 60% by weight of water, 35% by weight of ethanol, and 5% by weight of polypropylene glycol, and the sheet base material 1 was impregnated with the liquid. Although it was allowed to stand for a long time in the state of being impregnated with the liquid, the previous fiber layer portion A contained the liquid but was not restored to the expanded state. When this state is observed, the portion where the concave portion 2 exists is more impregnated with the liquid than each convex portion 3, and basically each whitish convex portion 3 has an independent island pattern with the white gray concave portion 2 as a base. Appeared to rise clearly. Further, with the passage of time, since the amount of water evaporation at each convex portion 3 was larger than that at the concave portion 2, the island pattern of each convex portion 3 appeared more remarkably. That is, the fiber layer portion B of each convex portion 3 is in a state of being reflected in white by embracing a larger amount of air than the fiber layer portion A of the concave portion 2.

シート基材１における凹部２の面積占有率は、１０％〜４０％にすればよい。１０％を下回ると、凸部３の面積が多くなり過ぎて、くっきりとした島柄模様が得られないし、４０％を超えると、吸液量が低くなり過ぎて、ウェットティッシュとしての実用性が損なわれるからである。   What is necessary is just to make the area occupation rate of the recessed part 2 in the sheet | seat base material 1 into 10%-40%. If it is less than 10%, the area of the convex part 3 will be too large and a clear island pattern will not be obtained. If it exceeds 40%, the liquid absorption will be too low, making it practical as a wet tissue. It is because it is damaged.

（実施例２） 実施例２のシート基材１は、吸液性繊維としてパルプ繊維を４５重量％、熱融着性を有する疎水性繊維として芯鞘繊維を５５重量％それぞれ含む不織布を用い、他は実施例１と同様にしてウェットティッシュを得た。 (Example 2) The sheet base material 1 of Example 2 uses a nonwoven fabric containing 45% by weight of pulp fibers as liquid-absorbing fibers and 55% by weight of core-sheath fibers as hydrophobic fibers having heat-fusibility, Otherwise, a wet tissue was obtained in the same manner as in Example 1.

但し、芯鞘繊維には、芯部分がポリエチレンテレスタレートであって鞘部分がポリエチレンからな第１の芯鞘繊維と、芯部分がポリプロピレンであって鞘部分がポリエチレンからなる第２の芯鞘繊維との２種を用いた。第１の芯鞘繊維は、0.５〜1.５デニールでシート基材１の全体繊維の２５重量％、第２芯鞘繊維は1.０〜2.５デニールでシート基材１の全体繊維の３０重量％とした。   However, the core-sheath fiber includes a first core-sheath fiber in which the core part is polyethylene telesterate and the sheath part is made of polyethylene, and a second core sheath whose core part is polypropylene and the sheath part is made of polyethylene. Two types with fiber were used. The first core-sheath fiber is 0.5 to 1.5 denier and 25% by weight of the total fiber of the sheet base material 1, and the second core-sheath fiber is 1.0 to 2.5 denier of the entire sheet base material 1 30% by weight of the fiber.

第１の芯鞘繊維は腰の強さ（剛性）があり、第２の芯鞘繊維は柔軟性に富み、硬軟の組み合わせにより、シート基材１中に液が入る空間を確保しながらも柔弾性に富み、鞘部分で熱融着作用を有効に発揮できるものとした。   The first core-sheath fiber has waist strength (rigidity), and the second core-sheath fiber is rich in flexibility, and the combination of hardness and softness ensures a soft space while ensuring a space for liquid to enter the sheet substrate 1. It is rich in elasticity and can effectively exhibit the heat-sealing action at the sheath portion.

（実施例３） 図４は本発明に係るウェットティッシュの実施例３を示しており、これのシート基材１の上側表面には、コットンに熱融着性繊維を含む薄厚の表面層７が一体に積層形成されている。かくして、シート基材１がコットン表面層７と共に加熱加圧下でエンボス加工されており、その余の構成は先の実施例２と同じである。 (Example 3) FIG. 4 shows Example 3 of a wet tissue according to the present invention. On the upper surface of the sheet base material 1, a thin surface layer 7 containing heat-fusible fibers in cotton is provided. The layers are integrally formed. Thus, the sheet base material 1 is embossed together with the cotton surface layer 7 under heat and pressure, and the rest of the configuration is the same as in the second embodiment.

実施例３のウェットティッシュによれば、コットン表面層７が豊かな吸液性と肌当たりの良さとを保証した高級なものになる。エンボス加工時にコットン表面層７も、凹部２の存在部位において高密度に圧縮され、熱融着性繊維による熱融着作用で圧縮状態によく維持されている。しかも、コットン表面層７は、シート基材１と一体結着しているので、液を含ませたとき凹部２において膨張状態に復元することを規制できる。したがって、各凸部３による独立した島模様がくっきりと現出したものが得られる。   According to the wet tissue of Example 3, the cotton surface layer 7 becomes a high-grade one that guarantees rich liquid absorbency and good skin contact. At the time of embossing, the cotton surface layer 7 is also compressed at a high density in the portion where the recess 2 is present, and is well maintained in a compressed state by the heat fusion action by the heat-fusible fiber. And since the cotton surface layer 7 is united with the sheet | seat base material 1, when a liquid is included, it can restrict | restoring to restore | restore in an expanded state in the recessed part 2. FIG. Therefore, what the independent island pattern by each convex part 3 appeared clearly is obtained.

（別実施例） 請求項１において、シート基材１の下面１ａは、必ずしも平坦面に形成されていることを要さず、例えば凹部２に対応する下面１ａの部分が内凹み状ないしは凸状、各凸部３に対応する下面１ａの部分が凸状ないしは内凹み状にそれぞれ形成されていてもよい。 (Another Example) In claim 1, the lower surface 1a of the sheet substrate 1 does not necessarily have to be formed on a flat surface. For example, a portion of the lower surface 1a corresponding to the recess 2 is indented or convex. The portions of the lower surface 1a corresponding to the respective convex portions 3 may be formed in a convex shape or an inner concave shape, respectively.

実施例１の平面図Plan view of Example 1 実施例１の断面図Sectional view of Example 1 実施例１を概念的に説明する断面図Sectional drawing which illustrates Example 1 conceptually 実施例３の断面図Sectional drawing of Example 3

符号の説明Explanation of symbols

１ シート基材
１ａ シート基材の平坦下面
２ 凹部
３ 凸部
５ 凹部の内底面
Ａ 凹部の繊維層部分
Ｂ 凸部の繊維層部分 DESCRIPTION OF SYMBOLS 1 Sheet base material 1a Flat bottom surface 2 of sheet base material Recess 3 Convex part 5 Inner bottom surface A of concave part Fiber layer part B of concave part Fiber layer part of convex part

Claims (8)

液を含浸するシート基材１が、吸液性繊維と疎水性繊維とを含み、全体にわたって実質的に均一な坪量に形成された不織布からなり、
シート基材１をエンボス加工することにより、シート基材１の上面に、一連につながる凹部２と、この凹部２で外周囲が囲撓された多数の凸部３とが形成されており、
凹部２の実質的に平坦な内底面５に臨む繊維層部分Ａが、各凸部３の実質的に平坦な頂上面６に臨む繊維層部分Ｂよりも高密度に圧縮されており、
凹部２の繊維層部分Ａにおける容積当たりの吸液率が、各凸部３の繊維層部分Ｂにおける容積当たりの吸液率よりも大きく設定されていることを特徴とする柄模様現出ウェットティシュ。 The sheet base material 1 impregnated with the liquid includes a non-woven fabric that includes liquid-absorbing fibers and hydrophobic fibers, and is formed in a substantially uniform basis weight throughout.
By embossing the sheet base material 1, a series of concave portions 2 and a large number of convex portions 3 whose outer periphery is bent by the concave portions 2 are formed on the upper surface of the sheet base material 1.
The fiber layer portion A facing the substantially flat inner bottom surface 5 of the concave portion 2 is compressed with a higher density than the fiber layer portion B facing the substantially flat top surface 6 of each convex portion 3,
Pattern-pattern-appearing wet tissue characterized in that the liquid absorption rate per volume in the fiber layer portion A of the recess 2 is set to be larger than the liquid absorption rate per volume in the fiber layer portion B of each projection 3 . シート基材１の平坦な下面１ａと、凹部２の実質的に平坦な内底面５との間の繊維層部分Ａが、シート基材１の平坦な下面１ａと、各凸部３の実質的に平坦な頂上面６との間の繊維層部分Ｂよりも高密度に圧縮された状態に維持されている請求項１記載の柄模様現出ウェットティッシュ。   The fiber layer portion A between the flat lower surface 1a of the sheet base material 1 and the substantially flat inner bottom surface 5 of the recess 2 is substantially flat between the flat lower surface 1a of the sheet base material 1 and each convex portion 3. The pattern-pattern-appearing wet tissue according to claim 1, which is maintained in a compressed state at a higher density than the fiber layer portion B between the top surface 6 and the flat top surface 6. シート基材１の上側表面に、コットンに熱融着性繊維を含ませた薄厚の不織布からなる表面繊維層７が一体に積層形成されており、
シート基材１が、表面繊維層７と共にエンボス加工されている請求項１または２記載の柄模様現出ウェットティッシュ。 On the upper surface of the sheet substrate 1, a surface fiber layer 7 made of a thin nonwoven fabric in which a heat-fusible fiber is contained in cotton is integrally laminated.
The pattern-pattern-appearing wet tissue according to claim 1 or 2, wherein the sheet substrate 1 is embossed together with the surface fiber layer 7. 各凸部３の繊維層部分Ｂの厚さＴ１が、1.０〜3.０mmに、凹部２の繊維層部分Ａの厚さＴ２が、前記厚さＴ１の２／５〜４／５にそれぞれ設定されており、
シート基材１の坪量が、６０〜３００ｇ／ｍ2 に設定されており、
凹部２の繊維層部分Ａにおける容積当たりの吸液率が、各凸部３の繊維層部分Ｂにおける容積当たりの吸液量の1.１〜2.０倍に設定されている請求項１または２記載の柄模様現出ウェットティシュ。 The thickness T1 of the fiber layer portion B of each convex portion 3 is 1.0 to 3.0 mm, and the thickness T2 of the fiber layer portion A of the concave portion 2 is 2/5 to 4/5 of the thickness T1. Each is set,
The basis weight of the sheet substrate 1 is set to 60 to 300 g / m 2 ,
The liquid absorption rate per volume in the fiber layer portion A of the concave portion 2 is set to 1.1 to 2.0 times the liquid absorption amount per volume in the fiber layer portion B of each convex portion 3. Patterned pattern wet wet tissue as described in 2. シート基材１には、吸液性繊維としてパルプ繊維が４５〜８５重量％含まれている請求項１または２記載の柄模様現出ウェットティッシュ。   The pattern-pattern-appearing wet tissue according to claim 1 or 2, wherein the sheet base material 1 contains 45 to 85% by weight of pulp fibers as liquid-absorbing fibers. 疎水性繊維が熱融着性を有し、
シート基材１を加熱下でエンボス加工したとき、前記凹部２の繊維層部分Ａが、疎水性繊維による熱溶着で高密度に圧縮された状態に維持されている請求項１または２記載の柄模様現出ウェットティッシュ。 Hydrophobic fibers have heat fusibility,
The handle according to claim 1 or 2, wherein when the sheet substrate 1 is embossed under heating, the fiber layer portion A of the concave portion 2 is maintained in a highly compressed state by heat welding with hydrophobic fibers. Pattern appearing wet tissue. 疎水性繊維は、芯部分がポリエチレンテレフタレート又はポリプロピレンであって、鞘部分がポリエチレンからなる芯鞘繊維である請求項１または２記載の柄模様現出ウェットティッシュ。   The pattern-pattern-appearing wet tissue according to claim 1 or 2, wherein the hydrophobic fiber is a core-sheath fiber having a core part made of polyethylene terephthalate or polypropylene and a sheath part made of polyethylene. 疎水性繊維は、芯部分がポリエチレンテレフタレートであって鞘部分がポリエチレンである第１の芯鞘繊維と、芯部分がポリプロピレンであって鞘部分がポリエチレンである第２の芯鞘繊維とからなる請求項１または２記載の柄模様現出ウェットティッシュ。   The hydrophobic fiber comprises a first core-sheath fiber in which the core part is polyethylene terephthalate and the sheath part is polyethylene, and a second core-sheath fiber in which the core part is polypropylene and the sheath part is polyethylene. Item 3. A patterned wet tissue appearing in item 1 or 2.
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WO2015146236A1 (en) * 2014-03-28 2015-10-01 ユニ・チャーム株式会社 Wet wipe and method for manufacturing wet wipe
US20170114503A1 (en) * 2014-03-28 2017-04-27 Unicharm Corporation Wet wipe and method for manufacturing wet wipe
US10441978B2 (en) 2014-05-30 2019-10-15 Kikuo Yamada Fiber sheet
WO2018186269A1 (en) * 2017-04-07 2018-10-11 旭化成株式会社 Cellulose nonwoven fabric with compacted parts
JPWO2018186269A1 (en) * 2017-04-07 2019-11-07 旭化成株式会社 Cellulose nonwoven fabric with consolidated part
US11629441B2 (en) 2017-04-07 2023-04-18 Asahi Kasei Kabushiki Kaisha Cellulose nonwoven fabric having compacted parts
JP2018188747A (en) * 2017-04-28 2018-11-29 日本製紙クレシア株式会社 Nonwoven fabric wiper and method for producing the same
KR20200100029A (en) 2017-12-28 2020-08-25 유니 참 코포레이션 Fiber nonwoven sheet

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