JP2000290899A - Substrate for wet sheet - Google Patents
Substrate for wet sheetInfo
- Publication number
- JP2000290899A JP2000290899A JP11096470A JP9647099A JP2000290899A JP 2000290899 A JP2000290899 A JP 2000290899A JP 11096470 A JP11096470 A JP 11096470A JP 9647099 A JP9647099 A JP 9647099A JP 2000290899 A JP2000290899 A JP 2000290899A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- sheets
- layer
- wet sheet
- base material
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ウェットシート用
基材に関し、更に詳しくは、２層以上のシートを重ね合
わせた多層構造からなり、優れた風合い及び液保持性を
有するウェットシート用基材に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base material for a wet sheet, and more particularly, to a base material for a wet sheet having a multilayer structure in which two or more sheets are superposed, and having excellent texture and liquid retention. About.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】洗浄・
清拭の効果を付与するウェットシートタイプの製品が多
数知られている。これらは被清拭面を清潔にしたり、身
体に用いる場合には肌に清涼感を与える目的で使用され
ている。BACKGROUND OF THE INVENTION Problems to be Solved by the Invention
Many wet sheet type products that provide a wiping effect are known. These are used for the purpose of cleaning the surface to be cleaned or giving a refreshing feeling to the skin when used on the body.
【０００３】これらウェットティッシュ、ウェットワイ
パーと呼ばれているウェットシートタイプの製品の基材
は、例えばキュプラ１００％不織布、コットン１００％
不織布、レーヨンを主素材として水流交絡法によりシー
ト化した不織布、湿式及び乾式パルプシートなどセルロ
ース系の素材を用いたものが殆どであった。これらの素
材は、熱の影響を受けにくく二次加工が困難であるた
め、通常単層（１枚もの）で用いられることが多い。例
えば、単層シートを一枚ずつ個包装したもの、あるいは
幾層かに折り畳んで１０〜８０枚位重ねたもの、あるい
はシートをロール状にしミシン目を施したものなどが市
販されている。このような製品は非常にシンプルで、製
品加工が容易ではあるものの、使用する際は厚みが不十
分で風合いに劣り、いわゆる「こし」のなさからよれを
生じ、心地よい使用感を与えるものではない。[0003] The base material of these wet sheet type products called wet tissue and wet wiper is, for example, 100% cupra non-woven fabric, 100% cotton
In most cases, nonwoven fabrics and rayon were used as main materials, and nonwoven fabrics formed into sheets by a hydroentanglement method, and cellulose-based materials such as wet and dry pulp sheets were mostly used. Since these materials are hardly affected by heat and difficult to perform secondary processing, they are usually used in a single layer (one sheet) in many cases. For example, single-layer sheets are individually wrapped one by one, folded into several layers and stacked about 10 to 80 sheets, or sheets rolled and perforated, and the like. Such products are very simple and easy to process, but when used they are not thick enough and have poor texture. .
【０００４】従って本発明は、嵩高く十分な厚み感を有
し、拭き心地が良く、使用時によれず、且つ柔軟で風合
いに優れ、十分な液保持性を有するウエットシート用基
材を提供することを目的とする。Accordingly, the present invention provides a base material for a wet sheet which is bulky and has a sufficient feeling of thickness, has a good wiping feeling, is not affected by use, is flexible, has excellent texture, and has a sufficient liquid holding property. The purpose is to:
【０００５】[0005]
【課題を解決するための手段】本発明は、少なくとも１
層のシートが親水性繊維を含有する、異種又は同種の２
層以上のシートを重ね合わせた多層構造からなり、層間
の剥離強度が５０ｃＮ／７５ｍｍ以上で、且つ厚みが
０．３〜５ｍｍであるウェットシート用基材を提供する
ことにより上記目的を達成したものである。SUMMARY OF THE INVENTION The present invention provides at least one
Heterogeneous or homogenous 2 in which the sheet of the layer contains hydrophilic fibers
The above object has been achieved by providing a base material for a wet sheet having a multilayer structure in which sheets of at least two layers are stacked and having a peel strength between layers of 50 cN / 75 mm or more and a thickness of 0.3 to 5 mm. It is.
【０００６】[0006]
【発明の実施の形態】以下、本発明のウエットシート用
基材（以下、基材シートともいう）の好ましい実施形態
について説明する。基材シートは、同種又は異種の２層
以上の単層シートを重ね合わせた多層構造からなるシー
ト状物である。基材シートを多層構造とすることによっ
て、嵩高く十分な厚み感が発現し、ウエットシートとし
て用いた場合に拭き心地が良好になる。また、十分な液
保持性も発現する。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, preferred embodiments of a base material for a wet sheet (hereinafter, also referred to as a base material sheet) of the present invention will be described. The base sheet is a sheet having a multilayer structure in which two or more single-layer sheets of the same type or different types are stacked. When the base sheet has a multilayer structure, a bulky and sufficient thickness feeling is exhibited, and when used as a wet sheet, wiping comfort is improved. In addition, sufficient liquid retention is also exhibited.
【０００７】基材シートを構成する単層シート間は所定
の手段により接合されており、基材シート全体として一
体化されたものとなっている。そして、隣接する単層シ
ート間の剥離強度が、５０ｃＮ／７５ｍｍ以上、好まし
くは１００ｃＮ／７５ｍｍ以上、更に好ましくは１５０
ｃＮ／７５ｍｍ以上となされている。これにより、ウエ
ットシートの使用時に層間剥離が起こることが効果的に
防止され、ウエットシートの操作性及び使用感が向上す
る。剥離強度の上限値に特に制限はなく、大きければ大
きいほど層間剥離の防止の点からは好ましいが、基材シ
ートの風合い等を考慮すると、上限値は４００ｃＮ／７
５ｍｍ程度であることが好ましい。[0007] The single-layer sheets constituting the base sheet are joined by a predetermined means so as to be integrated as a whole base sheet. And the peel strength between adjacent single layer sheets is 50 cN / 75 mm or more, preferably 100 cN / 75 mm or more, and more preferably 150 cN / 75 mm or more.
cN / 75 mm or more. This effectively prevents delamination during use of the wet sheet, and improves the operability and usability of the wet sheet. The upper limit of the peel strength is not particularly limited, and the larger the larger, the better in terms of prevention of delamination. However, considering the texture of the base sheet, the upper limit is 400 cN / 7.
It is preferably about 5 mm.
【０００８】剥離強度は以下のようにして測定される。
先ず基材シートから、幅７５ｍｍ×長さ１００ｍｍの測
定片を切り出す。そして、単層シート同士を剥離させＹ
字状となし、チャック間距離を１５ｍｍとした引張試験
機のチャックに装着し、速度３００ｍｍ／ｍｉｎで引っ
張ったときの最大応力を剥離強度とする。[0008] Peel strength is measured as follows.
First, a measuring piece having a width of 75 mm and a length of 100 mm is cut out from the base sheet. Then, the single-layer sheets are peeled off from each other and Y
It was attached to a chuck of a tensile tester with a chuck-to-chuck distance of 15 mm, and the maximum stress when pulled at a speed of 300 mm / min was taken as the peel strength.
【０００９】単層シート同士の接合手段としては、ホッ
トメルト粘着剤や両面テープなどを用いた貼り合わせに
よる接合、圧着による接合、ヒートシールによる接合な
どが挙げられる。基材シートに液体を含浸させることを
考慮すると、湿潤時にも十分な剥離強度を維持できるヒ
ートシールによる接合がより好ましい。Means for joining the single-layer sheets include joining by bonding using a hot-melt adhesive or double-sided tape, joining by pressure bonding, joining by heat sealing, and the like. Considering that the base sheet is impregnated with the liquid, joining by heat sealing that can maintain sufficient peel strength even when wet is more preferable.
【００１０】隣接する単層シート同士の接合は、基材シ
ートの風合いの低下を防ぐ点から部分的に行われること
が好ましい。その場合の接合面積は、基材シートの面積
に対して３〜５０％、特に５〜１５％であることが好ま
しい。[0010] Adjacent single-layer sheets are preferably partially joined from the viewpoint of preventing the texture of the base sheet from lowering. In this case, the bonding area is preferably 3 to 50%, particularly preferably 5 to 15% based on the area of the base sheet.
【００１１】基材シートには一般に水性媒体が含浸され
ることから、少なくとも１層、好ましくはすべての単層
シートが、セルロース系繊維等の親水性繊維、又は疎水
性繊維に親水化処理が施された繊維を含有する。Since the base sheet is generally impregnated with an aqueous medium, at least one layer, preferably all of the single-layer sheets, are subjected to a hydrophilic treatment such as a cellulosic fiber or a hydrophobic fiber by a hydrophilic treatment. Containing fibers.
【００１２】単層シートを構成する材料としては、具体
的にはパルプ及びコットン等の天然繊維、レーヨン及び
アセテート等の再生繊維並びにポリエチレンテレフタレ
ート（ＰＥＴ）などのポリエステル、ポリエチレン（Ｐ
Ｅ）、ポリプロピレン及びポリウレタン等の熱可塑性樹
脂からなる繊維などの繊維状物が好ましく用いられる。
パルプ、コットン及びレーヨン等のセルロース系繊維の
みから単層シートを構成した場合には、接合手段として
ヒートシールは有効でなく、圧着その他の接合手段を用
いることになる。十分な剥離強度を得る観点からは、セ
ルロース系繊維を熱可塑性樹脂からなる繊維と併用し、
接合手段としてヒートシールを用いることが好ましい。
また、熱可塑性樹脂からなる繊維としてアクリル樹脂及
びポリアミド等からなる繊維を用いることで、セルロー
ス系繊維のみを使用しては得られにくい嵩高さや光沢な
どを基材シートに付与することができる。Specific examples of the material constituting the single-layer sheet include natural fibers such as pulp and cotton; recycled fibers such as rayon and acetate; polyesters such as polyethylene terephthalate (PET);
E), fibrous materials such as fibers made of thermoplastic resins such as polypropylene and polyurethane are preferably used.
When a single-layer sheet is composed only of cellulosic fibers such as pulp, cotton, rayon, etc., heat sealing is not effective as a joining means, and pressure bonding or other joining means is used. From the viewpoint of obtaining sufficient peel strength, a cellulose fiber is used in combination with a fiber made of a thermoplastic resin,
It is preferable to use a heat seal as the joining means.
In addition, by using a fiber made of an acrylic resin, a polyamide, or the like as the fiber made of the thermoplastic resin, it is possible to impart bulkiness, gloss, and the like to the base sheet, which are hardly obtained by using only the cellulosic fiber.
【００１３】特に、基材シートの風合い、単層シート間
の剥離強度及び液の含浸容量の向上等の点から、単層シ
ートは、セルロース系繊維及び熱可塑性樹脂からなる繊
維を含むことが好ましい。この場合、セルロース系繊維
と熱可塑性樹脂からなる繊維との割合（前者：後者）
は、９９：１〜５０：５０、特に９５：５〜７５：２５
であることが、十分な液保持性と熱シール性とを満足し
得る点から好ましい。In particular, the single-layer sheet preferably contains cellulose-based fibers and fibers made of a thermoplastic resin from the viewpoint of improving the feel of the base material sheet, the peel strength between the single-layer sheets, and the impregnation capacity of the liquid. . In this case, the ratio of cellulosic fibers to fibers made of thermoplastic resin (the former: the latter)
Is 99: 1 to 50:50, particularly 95: 5 to 75:25
Is preferable in that sufficient liquid retention and heat sealing properties can be satisfied.
【００１４】単層シートとしては、該シートが繊維状物
から構成されている場合、各種不織布、紙、織布、編物
等を用いることができ、特に不織布、紙を用いること
が、種類が豊富なため種々の性能のコントロールが容易
であり、また製造経費が安い点から好ましい。不織布を
用いる場合、その製造法としては、スパンレース法、ス
パンボンド法、ヒートボンド法、メルトブローン法、フ
ラッシュ紡糸法、分割繊維を物理的又は化学的な方法で
分割し、水流交絡、熱融着又はレジンボンド（登録商
標）等で接着又は交絡する方法が用いられ、また、紙を
用いる場合には、湿式抄紙法や乾式抄紙法が用いられ
る。When the sheet is made of a fibrous material, various types of nonwoven fabric, paper, woven fabric, knitted fabric, etc. can be used as the single-layer sheet. Therefore, it is preferable because various performances can be easily controlled and the production cost is low. When using a non-woven fabric, spun lace method, spun bond method, heat bond method, melt blown method, flash spinning method, splitting the split fiber by physical or chemical method, hydroentanglement, heat fusion Alternatively, a method of bonding or entanglement with a resin bond (registered trademark) or the like is used, and when paper is used, a wet papermaking method or a dry papermaking method is used.
【００１５】基材シートは、その厚みが０．３〜５ｍｍ
であり、好ましくは０．５〜２ｍｍである。これにより
ウエットシート使用時に使用者にしっかり感を与える。
厚みは、荷重３．７ｇ／ｃｍ2 で測定されたものをい
う。The base sheet has a thickness of 0.3 to 5 mm.
And preferably 0.5 to 2 mm. This gives the user a firm feeling when using the wet sheet.
The thickness is measured at a load of 3.7 g / cm 2 .
【００１６】基材シートは一方の表面及び他方の表面を
有するが、両表面は、液体の含浸若しくは放出、粉体の
担持若しくは被転写面への転写及び／又は拭き取り性能
が略同一であることが、ウエットシートとして用いた場
合に両表面ともに同様に用いることができる点から好ま
しい。The base sheet has one surface and the other surface, and both surfaces have substantially the same impregnation or discharge performance of liquid, powder carrying or transfer to a transfer receiving surface and / or wiping performance. However, when used as a wet sheet, both surfaces are preferably used in the same manner.
【００１７】基材シートに液が含浸されてなるウエット
シートは、通常複数枚が積み重ねられた状態で収納・流
通・保存等されるが、基材シートに十分な液保持性がな
いと、含浸された液が次第に下方へ移行して、上部に位
置するウエットシートと下部に位置するウエットシート
との間で液の含浸量に差異が生じてしまう。その結果、
積み重ねられたウエットシートを上から使用した場合に
は、濡れ性が十分でないために清拭効果が劣り、逆に下
から使用した場合には、濡れすぎているために清拭対象
面に余分な液が残留してしまう。そこで、基材シート
は、乾燥重量の２．７５倍の含浸液を含浸させた１００
ｍｍ×１５０ｍｍの大きさ基材シートを３０枚積み重
ね、２４時間放置した後の最上部から５枚の基材シート
の含水率の平均値（％）と最下部から５枚の基材シート
の含水率の平均値（％）との差（後者−前者）が３０以
下、特に１５以下であるような液保持性（以下、集積液
保持性という）を有していることが好ましい。前記差
は、０であることがもちろん理想的である。また、中間
の層における液保持性の差は、上下層の差より小さいこ
とを前提とする。尚、前記含浸液は、シリコーン樹脂系
微粒子（平均粒径２μｍ）７重量％、シリコン油（２５
℃での粘度５ｍｍ2 ／ｓ）１重量％、カーボポール１重
量％、エタノール１５重量％、パラオキシ安息香酸エチ
ル０．５重量％、水７５．５重量％からなるものであ
る。A wet sheet obtained by impregnating a liquid into a base sheet is usually stored, distributed, stored, or the like in a state in which a plurality of sheets are stacked. The applied liquid gradually moves downward, and a difference occurs in the amount of liquid impregnation between the upper wet sheet and the lower wet sheet. as a result,
When the wet sheets are used from above, the wiping effect is inferior due to insufficient wettability. Liquid remains. Therefore, the base sheet was impregnated with 2.75 times the dry weight of the impregnating liquid.
The average value (%) of the water content of the five base sheets from the top and the water content of the five base sheets from the bottom after stacking 30 base sheets each having a size of 150 mm × 150 mm and standing for 24 hours It is preferable to have a liquid retention property (hereinafter referred to as an accumulation liquid retention property) such that the difference (the latter-the former) from the average value (%) of the ratio is 30 or less, particularly 15 or less. Ideally, the difference is zero. Also, it is assumed that the difference in liquid retention between the intermediate layers is smaller than the difference between the upper and lower layers. The impregnating liquid was composed of 7% by weight of silicone resin-based fine particles (average particle size: 2 μm) and silicone oil (25%).
Viscosity at 5 ° C. 5 mm 2 / s) 1% by weight, Carbopol 1% by weight, ethanol 15% by weight, ethyl paraoxybenzoate 0.5% by weight, water 75.5% by weight.
【００１８】前記集積液保持性を満足させる方法として
は、液を十分に保持できるだけのパルプ等のセルロース
系繊維を単層シートに含有させる方法が第１ではある。
しかし、その場合には単層シート間の剥離強度を前記の
値以上とすることが困難なことがある。剥離強度を高め
るには、熱可塑性樹脂からなる繊維の割合を高くするこ
とが有効であることは前述の通りであるが、その場合に
は、一般的に熱可塑性樹脂からなる繊維の多くが疎水性
であるために、含浸液を十分に保持できないことがあ
る。そこで例えば以下の方法によって前記集積液保持性
を満足させ得ることを本発明者らは見出した。As a method for satisfying the above-mentioned liquid holding ability, a first method is to include a cellulosic fiber such as pulp in a single-layer sheet that can sufficiently hold the liquid.
However, in that case, it may be difficult to make the peel strength between the single-layer sheets equal to or more than the above value. As described above, it is effective to increase the ratio of the fiber made of the thermoplastic resin in order to increase the peel strength. In that case, however, in general, most of the fiber made of the thermoplastic resin is hydrophobic. , The impregnating liquid may not be able to be held sufficiently. Thus, the present inventors have found that the above-mentioned accumulated liquid retention can be satisfied, for example, by the following method.
【００１９】即ち、セルロース系繊維及び熱可塑性樹脂
からなる繊維を含む単層シートにおいて疎水性繊維の割
合が高い単層シートを用いる場合には、該単層シート
を、該単層シートよりもセルロース系繊維の割合が高い
異種の単層シート間に介在させる方法が有効である。換
言すれば、セルロース系繊維及び熱可塑性樹脂からなる
繊維を含む２種以上の単層シートを用い、セルロース系
繊維の割合が高い（つまり熱可塑性樹脂からなる繊維の
割合が低い）単層シート間に、セルロース系繊維の割合
が低い（つまり熱可塑性樹脂からなる繊維の割合が高
い）単層シートを介在させる方法が有効である。この方
法によれば、セルロース系繊維の割合が高い単層シート
が、十分な液保持性を発揮し、液を下方に移行させない
遮蔽層として働くと同時に、多層構造によって一層多く
の空間が形成され、その空間に液が保持され易くなるた
め、前記集積液保持性が満足されると考えられる。That is, when a single-layer sheet containing a high proportion of hydrophobic fibers is used in a single-layer sheet containing cellulose-based fibers and fibers made of a thermoplastic resin, the single-layer sheet is more cellulose-free than the single-layer sheet. It is effective to interpose between different types of single layer sheets having a high proportion of the system fiber. In other words, two or more types of single-layer sheets containing cellulose-based fibers and fibers made of a thermoplastic resin are used, and the ratio of cellulose-based fibers is high (that is, the ratio of fibers made of a thermoplastic resin is low). In addition, a method of interposing a single-layer sheet having a low ratio of cellulosic fibers (that is, a high ratio of fibers made of a thermoplastic resin) is effective. According to this method, the single-layer sheet having a high proportion of the cellulosic fiber exhibits sufficient liquid holding properties and acts as a shielding layer that does not transfer liquid downward, and at the same time, more space is formed by the multilayer structure. It is considered that the liquid is easily held in the space, and thus the accumulated liquid holding property is satisfied.
【００２０】例えば、１層目の単層シートは、液を十分
保持できるようにセルロース系繊維の割合を高くし（例
えばセルロース系繊維８０〜９９％、熱可塑性樹脂から
なる繊維１〜２０％）、２層目の単層シートは、剥離強
度の向上を重視してセルロース系繊維の割合を１層目の
単層シートよりも低くし、代わりに熱可塑性樹脂からな
る繊維の割合を１層目の単層シートよりも高くする（例
えばセルロース系繊維５０〜９０％、熱可塑性樹脂から
なる繊維５０〜１０％）。これら２枚の単層シートを重
ね合わせて２プライの複合シートを得、該複合シートを
２枚用い、２層目の単層シートが対向するように重ね合
わせて４プライとし、これらを所定の手段、例えばヒー
トシールで接合一体化すれば、多層構造を有する１枚の
基材シートが完成する。熱可塑性樹脂からなる繊維を多
く含む層（即ち２層目の単層シート）は、ヒートシール
性に優れる上に、熱可塑性樹脂からなる繊維の形状はセ
ルロース系繊維に比べ太く均一なために繊維間に隙間が
でき易く嵩高で柔軟になり易い。また、セルロース系繊
維を多く含む層（即ち１層目の単層シート）は、液を十
分に保持し、さらに液を下方へ移行させない遮蔽層とし
ての役割を果たす。このような２種の単層シートの適切
な組み合わせにより、１枚で様々な機能性を有する基材
シートを得ることができる。しかもこの基材シートは多
層構造を有しているために、１枚でも十分な厚みがあ
り、ウエットシートとして用いた場合に、拭き心地に優
れ、柔軟な風合いを有するものとなる。For example, in the first single-layer sheet, the proportion of cellulosic fibers is increased (for example, 80 to 99% of cellulosic fibers and 1 to 20% of fibers made of a thermoplastic resin) so that the liquid can be sufficiently retained. The second-layer single-layer sheet has a lower proportion of the cellulosic fiber than the first-layer single-layer sheet with emphasis on the improvement of the peel strength, and instead has the first-layer thermoplastic fiber proportion as the first-layer sheet. (For example, 50 to 90% of cellulosic fibers and 50 to 10% of fibers made of a thermoplastic resin). These two single-layer sheets are overlapped to obtain a two-ply composite sheet, and two of the composite sheets are used to overlap each other so that the second-layer single-layer sheet faces each other to form four plies. By joining and integrating by means such as heat sealing, one base sheet having a multilayer structure is completed. A layer containing a large amount of fibers made of a thermoplastic resin (that is, a single-layer sheet of the second layer) is excellent in heat sealability, and the shape of the fibers made of a thermoplastic resin is thicker and more uniform than that of a cellulosic fiber. It is easy to have a gap between them and it is easy to be bulky and flexible. The layer containing a large amount of cellulosic fibers (that is, the first single-layer sheet) functions as a shielding layer that sufficiently holds the liquid and does not allow the liquid to migrate downward. By a proper combination of such two types of single-layer sheets, a single base sheet having various functions can be obtained. In addition, since this base sheet has a multilayer structure, even one sheet has a sufficient thickness, and when used as a wet sheet, has excellent wiping comfort and a soft texture.
【００２１】基材シートは、嵩高さ及び風合いを向上さ
せる点から凹凸賦形されていることが好ましい。凹凸賦
形には、例えばスチールマッチエンボス加工が用いられ
る。スチールマッチエンボス加工には、一対のエンボス
ロールが用いられる。各エンボスロールには多数の凹凸
部が規則的に形成されている。詳しくは一方のエンボス
ロールの凸部が他方のエンボスロールの凹部に嵌合する
ように、各エンボスロールに凹凸部が形成されている。
そして、両ロールによって基材シートを押圧すること
で、基材シートに凹凸形状が付与される。The base sheet is preferably formed with irregularities from the viewpoint of improving bulkiness and feeling. For example, a steel match embossing process is used for the uneven shaping. For steel match embossing, a pair of embossing rolls is used. Many embossed portions are regularly formed on each embossing roll. More specifically, each embossing roll is provided with an uneven portion such that the projection of one embossing roll fits into the recess of the other embossing roll.
Then, the base sheet is pressed by the two rolls, so that the base sheet has an uneven shape.
【００２２】また、隣り合う単層シートが部分的に圧着
又は融着されて、単層シート同士が接合された領域が断
続的に又は連続的に形成されることで単層シートが一体
化して基材シートを構成していることも好ましい。この
場合、前記領域が略平坦な状態（例えばフィルム状ない
しフィルム様の状態）になる程度まで圧着又は融着され
ることが、単層シートの十分な一体化の点から好まし
い。特に、単層シートに熱可塑性樹脂からなる繊維が含
有される場合には、融着が一層効果的に行われる。圧着
又は融着には一般的な圧延シール機やヒートシール機が
用いられる。Further, adjacent single-layer sheets are partially press-bonded or fused to form a region where the single-layer sheets are joined intermittently or continuously so that the single-layer sheets are integrated. It is also preferable to constitute a base sheet. In this case, it is preferable from the viewpoint of sufficient integration of the single-layer sheet that the area be pressed or fused to such an extent that the area becomes substantially flat (for example, a film-like or film-like state). In particular, when the single-layer sheet contains fibers made of a thermoplastic resin, the fusion is more effectively performed. A common rolling seal machine or heat seal machine is used for pressure bonding or fusion.
【００２３】特に好ましい基材シートは、パルプ等のセ
ルロース系繊維及び熱可塑性樹脂からなる繊維を含有す
る異種の単層シートを２枚（シートＡ及びシートＢ）重
ね合わせ、これに凹凸賦形して凹凸シートを得、この凹
凸シートを、同種の単層シート同士が対向するように
（例えばシートＡ同士又はシートＢ同士が対向するよう
に）２枚重ね合わせ、部分的に圧着又は融着することで
接合一体化させてなる４プライの基材シートである。As a particularly preferred base sheet, two different single-layer sheets (sheet A and sheet B) containing cellulosic fibers such as pulp and fibers made of a thermoplastic resin are superimposed and formed into an irregular shape. To obtain a concavo-convex sheet, two such concavo-convex sheets are overlapped with each other so that single-layer sheets of the same type are opposed to each other (for example, sheets A and B are opposed to each other), and partially press-bonded or fused. This is a four-ply base sheet that is joined and integrated by the above.
【００２４】最も好ましい基材シートは、パルプ等のセ
ルロース系繊維及び熱可塑性樹脂からなる繊維を含有す
る異種の単層シートを２枚（シートＡ及びシートＢ）重
ね合わせ、これに凹凸賦形して凹凸シートを得、この凹
凸シートを、同種の単層シート同士が対向するように
（例えばシートＡ同士又はシートＢ同士が対向するよう
に）２枚重ね合わせ、部分的に圧着又は融着することで
接合一体化させてなる４プライの基材シートであって、
前記対向する２枚の単層シート（即ち中間の２枚の単層
シート）における熱可塑性樹脂からなる繊維の割合が、
最外層に位置する２枚の単層シートにおける熱可塑性樹
脂からなる繊維の割合よりも高い（換言すれば、前記対
向する２枚の単層シートにおけるセルロース系繊維の割
合が、最外層に位置する２枚の単層シートにおけるセル
ロース系繊維の割合よりも低い）基材シートである。The most preferred base sheet is formed by laminating two sheets (sheet A and sheet B) of different kinds of single-layer sheets each containing a cellulosic fiber such as pulp and a fiber made of a thermoplastic resin, and shaping the sheet into irregularities. To obtain a concavo-convex sheet, two such concavo-convex sheets are overlapped with each other so that single-layer sheets of the same type are opposed to each other (for example, sheets A and B are opposed to each other), and partially press-bonded or fused. A four-ply base sheet that is joined and integrated by
The ratio of the fiber made of the thermoplastic resin in the two opposed single-layer sheets (that is, two intermediate single-layer sheets) is as follows:
The ratio of the fibers composed of thermoplastic resin in the two single-layer sheets located in the outermost layer is higher (in other words, the ratio of the cellulosic fibers in the opposed two single-layer sheets is the position in the outermost layer). (Lower than the ratio of cellulosic fibers in the two single-layer sheets).
【００２５】基材シートは、各種の液が含浸されてウエ
ットシートとなされる。含浸させる液としては、水や含
水アルコール等の水性媒体が、対人・対物の清拭の点か
ら好ましい。液の含浸率は、基材シート重量の５０〜５
００重量％が好ましく、特に１００〜４００重量％が使
用感を高める上で好ましい。アルコールとしては、エタ
ノール、プロピレングリコール、１，３−ブタンジオー
ル、イソプレングリコール、グリセリン、ソルビトール
などが好ましい。水性媒体には、抗菌効果や保湿効果を
付与できる薬剤を添加してもよい。また、基材シートに
液を含浸させ、更に各種粉体を担持させて、種々の機能
が付与されたウエットシートとなしてもよい。The base sheet is impregnated with various liquids to form a wet sheet. As the liquid to be impregnated, an aqueous medium such as water or hydroalcohol is preferable from the viewpoint of wiping an individual or an object. The liquid impregnation rate is 50 to 5 times the weight of the base sheet.
00% by weight is preferred, and 100 to 400% by weight is particularly preferred for enhancing the usability. As the alcohol, ethanol, propylene glycol, 1,3-butanediol, isoprene glycol, glycerin, sorbitol and the like are preferable. An agent capable of imparting an antibacterial effect or a moisturizing effect may be added to the aqueous medium. Further, the base sheet may be impregnated with a liquid and further carry various powders to form a wet sheet provided with various functions.
【００２６】本発明は上記実施形態に制限されず、例え
ば前記の説明は異種の単層シートの組み合わせにおいて
各々の単層シートの特長を生かした場合の利点を中心に
述べたが、同種の単層シートの組み合わせからなる基材
シートを用いた場合でも、単層の基材シートとは明らか
に風合いが異なり、柔軟で十分な厚みと使用感を与える
ことができる。The present invention is not limited to the above-described embodiment. For example, the above description has focused on the advantages of utilizing the characteristics of each single-layer sheet in a combination of different types of single-layer sheets. Even when a base sheet composed of a combination of layer sheets is used, the texture is clearly different from that of a single-layer base sheet, and it is possible to give a soft and sufficient thickness and a feeling of use.
【００２７】また、基材シートが３層以上の単層シート
から構成されている場合、少なくとも何れかの単層シー
ト間の剥離強度が前記の値以上となっていればよい。When the base sheet is composed of three or more single-layer sheets, it is sufficient that at least one of the single-layer sheets has a peel strength not less than the above-mentioned value.
【００２８】また、基材シートを構成する単層シートと
して、繊維状物からなる単層シートに代えて又は該単層
シートと共にフィルムや発泡シート等を用いることもで
きる。水性媒体の含浸に用いられる場合には、これらフ
ィルム、シートを親水化して用いてもよい。As the single-layer sheet constituting the base sheet, a film, a foamed sheet or the like may be used instead of the single-layer sheet made of a fibrous material or together with the single-layer sheet. When used for impregnation with an aqueous medium, these films and sheets may be used after being made hydrophilic.
【００２９】[0029]
【実施例】以下の例中、特に断らない限り「％」は「重
量％」を意味する。EXAMPLES In the following examples, "%" means "% by weight" unless otherwise specified.
【００３０】〔実施例１〕パルプ（ＮＢＫＰ）９０％及
びＰＥＴ繊維１０％を配合、叩解、異物除去し抄紙を行
い単層紙１（坪量３０ｇ／ｍ2 ）を得た。同様にしてパ
ルプ（ＮＢＫＰ）８０％とＰＥＴ繊維２０％を配合、叩
解、異物除去し抄紙を行い単層紙２（坪量３０ｇ／
ｍ2 ）を得た。単層紙１と単層紙２とを重ね合わせ、こ
れにスチールマッチエンボス加工を施して凹凸複層紙を
得た。凹凸複層紙２枚を、単層紙２同士が対向するよう
に重ね合わせ、所定パターンでヒートシールして４プラ
イの基材シートを得た。この基材シートの坪量、厚み及
び剥離強度を表１に示す。Example 1 90% of pulp (NBKP) and 10% of PET fiber were blended, beaten, and foreign matters were removed to make a paper, thereby obtaining a single layer paper 1 (basis weight: 30 g / m 2 ). Similarly, 80% of pulp (NBKP) and 20% of PET fiber are blended, beaten, and foreign matters are removed to make paper.
m 2 ) was obtained. The single-layer paper 1 and the single-layer paper 2 were overlaid and subjected to steel match embossing to obtain an uneven multilayer paper. Two sheets of uneven multilayer paper were overlapped so that the single-layer papers 2 faced each other, and heat-sealed in a predetermined pattern to obtain a 4-ply base sheet. Table 1 shows the basis weight, thickness, and peel strength of the base sheet.
【００３１】得られた基材シートに以下の方法で調製し
た含浸液を、含浸率が２７５％となるようにスプレー噴
霧して、ウエットシートを得た。 ＜含浸液の調整＞シリコーン樹脂系微粒子（平均粒径２
μｍ）７％、シリコン油（２５℃での粘度５ｍｍ2 ／
ｓ）１％、カーボポール１％、エタノール１５％、パラ
オキシ安息香酸エチル０．５％、水７５．５％をホモミ
キサーを用いて混合し含浸液を調製した。The impregnating solution prepared by the following method was spray-sprayed on the obtained base sheet so that the impregnation ratio became 275%, to obtain a wet sheet. <Adjustment of impregnating liquid> Silicone resin-based fine particles (average particle size 2
μm) 7%, silicone oil (viscosity at 25 ° C. 5 mm 2 /
s) 1%, Carbopol 1%, ethanol 15%, ethyl paraoxybenzoate 0.5%, and water 75.5% were mixed using a homomixer to prepare an impregnation liquid.
【００３２】〔実施例２〕実施例１で用いた単層紙１を
２枚重ね合わせ、これにスチールマッチエンボス加工を
施して凹凸複層紙を得た。凹凸複層紙２枚を重ね合わ
せ、その後は実施例１と同様にして４プライの基材シー
ト及びウエットシートを得た。基材シートの坪量、厚み
及び剥離強度を表１に示す。Example 2 Two sheets of single-layer paper 1 used in Example 1 were overlaid, and this was subjected to steel match embossing to obtain an uneven multilayer paper. Two sheets of uneven multilayer paper were overlapped, and thereafter a 4-ply base sheet and a wet sheet were obtained in the same manner as in Example 1. Table 1 shows the basis weight, thickness and peel strength of the base sheet.
【００３３】〔実施例３〕レーヨン８０％とＰＥＴ／Ｐ
Ｅの芯鞘型複合繊維２０％とを混綿したウェブを、ウェ
ータージェットにより繊維交絡させ不織布（坪量４０ｇ
／ｍ2 ）を得た。この不織布２枚を重ね合わせ、所定パ
ターンでヒートシールして２プライの基材シートを得
た。その後は実施例１と同様にしてウエットシートを得
た。基材シートの坪量、厚み及び剥離強度を表１に示
す。Example 3 80% rayon and PET / P
A web mixed with 20% of the core-in-sheath type conjugate fiber of E is entangled by a water jet to form a nonwoven fabric (basis weight: 40 g).
/ M 2 ). The two nonwoven fabrics were overlapped and heat-sealed in a predetermined pattern to obtain a two-ply base sheet. Thereafter, a wet sheet was obtained in the same manner as in Example 1. Table 1 shows the basis weight, thickness and peel strength of the base sheet.
【００３４】〔実施例４〕実施例１で用いた単層紙１を
２枚重ね合わせ、これにスチールマッチエンボス加工を
施して凹凸複層紙を得た。この凹凸複層紙に所定パター
ンでヒートシールして２プライの基材シートを得た。そ
の後は実施例１と同様にしてウエットシートを得た。基
材シートの坪量、厚み及び剥離強度を表１に示す。Example 4 Two sheets of the single-layer paper 1 used in Example 1 were overlaid, and this was subjected to steel match embossing to obtain an uneven multilayer paper. This irregular multilayer paper was heat-sealed in a predetermined pattern to obtain a two-ply base sheet. Thereafter, a wet sheet was obtained in the same manner as in Example 1. Table 1 shows the basis weight, thickness and peel strength of the base sheet.
【００３５】〔比較例１〕実施例１で用いた単層紙１を
基材シートとして用いた。その後は実施例１と同様にし
てウエットシートを得た。基材シートの坪量、厚み及び
剥離強度を表１に示す。Comparative Example 1 The single-layer paper 1 used in Example 1 was used as a base sheet. Thereafter, a wet sheet was obtained in the same manner as in Example 1. Table 1 shows the basis weight, thickness and peel strength of the base sheet.
【００３６】〔比較例２〕コットン１００％からなる坪
量４０ｇ／ｍ2 のスパンレース不織布（コットンシー
ト）を基材シートとして用いた。その後は実施例１と同
様にしてウエットシートを得た。基材シートの坪量、厚
み及び剥離強度を表１に示す。Comparative Example 2 A spunlaced nonwoven fabric (cotton sheet) having a basis weight of 40 g / m 2 and made of 100% cotton was used as a base sheet. Thereafter, a wet sheet was obtained in the same manner as in Example 1. Table 1 shows the basis weight, thickness and peel strength of the base sheet.
【００３７】〔比較例３〕パルプ（ＮＢＫＰ）８０％及
びＰＥＴ繊維２０％を配合、叩解、異物除去し抄紙を行
い単層紙（坪量３０ｇ／ｍ2 ）を得た。その後は実施例
１と同様にしてウエットシートを得た。基材シートの坪
量、厚み及び剥離強度を表１に示す。Comparative Example 3 A single layer paper (basis weight 30 g / m 2 ) was prepared by mixing 80% of pulp (NBKP) and 20% of PET fiber, beaten, and removed foreign matter to make paper. Thereafter, a wet sheet was obtained in the same manner as in Example 1. Table 1 shows the basis weight, thickness and peel strength of the base sheet.
【００３８】〔性能評価〕実施例及び比較例で得られた
ウエットシートについて風合い（拭き心地）を以下の基
準で評価し、また集積液保持性を測定した。その結果を
表１に示す。[Evaluation of Performance] With respect to the wet sheets obtained in Examples and Comparative Examples, the feeling (wiping comfort) was evaluated according to the following criteria, and the retention of the accumulated liquid was measured. Table 1 shows the results.
【００３９】・風合い（拭き心地） ○・・・厚みがあり柔らかく、しっかり拭ける。拭き心
地良い。 △・・・柔らかくが薄く、清拭時よれる。拭き心地あま
り良くない。 ×・・・薄くてよれる。拭き心地悪い。Texture (wiping comfort) ・ ・ ・: Thick, soft, and can be wiped firmly. Comfortable to wipe. Δ: Soft but thin, wrinkled during wiping. Not very comfortable to wipe. ×: thin Uncomfortable to wipe.
【００４０】[0040]
【表１】 [Table 1]
【００４１】表１に示す結果から明らかなように、各実
施例で得られた基材シートに含浸液を含浸させてなるウ
エットシートは、比較例のウエットシートに比して、風
合い（拭き心地）及び集積液保持性に優れたものである
ことが判る。As is clear from the results shown in Table 1, the wet sheet obtained by impregnating the base sheet obtained in each example with the impregnating liquid has a better texture (wiping comfort) than the wet sheet of the comparative example. ) And excellent retention of the accumulated liquid.
【００４２】[0042]
【発明の効果】本発明によれば、嵩高く十分な厚み感を
有し、拭き心地が良く、使用時によれず、且つ柔軟で風
合いに優れ、十分な液保持性を有するウエットシート用
基材が提供される。According to the present invention, a base material for a wet sheet which is bulky and has a sufficient thickness feeling, has a good wiping comfort, is not affected by the use, is flexible and has excellent texture, and has a sufficient liquid retaining property. Is provided.
【手続補正書】[Procedure amendment]
【提出日】平成１２年５月２３日（２０００．５．２
３）[Submission date] May 23, 2000 (2005.2
3)
【手続補正１】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】特許請求の範囲[Correction target item name] Claims
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【特許請求の範囲】[Claims]
【手続補正２】[Procedure amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００５[Correction target item name] 0005
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【０００５】[0005]
【課題を解決するための手段】本発明は、少なくとも１
層のシートが親水性繊維を含有する、異種又は同種の凹
凸賦形された２層以上の凹凸シートを重ね合わせ、隣り
合う該凹凸シート同士が接合された領域を有するように
該凹凸シートを部分的に圧着又は融着させてなる多層構
造からなり、層間の剥離強度が５０ｃＮ／７５ｍｍ以上
で、且つ厚みが０．３〜５ｍｍであり、凹凸賦形されて
いるウェットシート用基材を提供することにより上記目
的を達成したものである。SUMMARY OF THE INVENTION The present invention provides at least one
Heterogeneous or homogenous recesses in which the sheets of the layer contain hydrophilic fibers
Laminate two or more convex and concave shaped sheets, and place them next to each other
So that it has a region where the matching uneven sheets are joined
The uneven sheet partially crimped or fused a multilayer structure in which, in the peel strength of the layers is 50 cN / 75 mm or more, and a thickness of 0.3~5mm der is, is uneven shaped
It is obtained by achieving the above objects by providing a wet sheet base material while creating.
【手続補正３】[Procedure amendment 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００６[Correction target item name] 0006
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【０００６】[0006]
【発明の実施の形態】以下、本発明のウエットシート用
基材（以下、基材シートともいう）の好ましい実施形態
について説明する。基材シートは、同種又は異種の凹凸
賦形された２層以上の凹凸シート（以下、単層シートと
もいう）を重ね合わせた多層構造からなるシート状物で
ある。基材シートを多層構造とすることによって、嵩高
く十分な厚み感が発現し、ウエットシートとして用いた
場合に拭き心地が良好になる。また、十分な液保持性も
発現する。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, preferred embodiments of a base material for a wet sheet (hereinafter, also referred to as a base material sheet) of the present invention will be described. The base sheet is the same or different unevenness
Two- or more-layer shaped uneven sheet (hereinafter referred to as a single-layer sheet)
) Is a sheet-like material having a multilayer structure in which the sheets are stacked. When the base sheet has a multilayer structure, a bulky and sufficient thickness feeling is exhibited, and when used as a wet sheet, wiping comfort is improved. In addition, sufficient liquid retention is also exhibited.
【手続補正４】[Procedure amendment 4]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１０[Correction target item name] 0010
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００１０】隣接する単層シート同士の接合は、基材シ
ートの風合いの低下を防ぐ点から部分的に行われる。そ
の場合の接合面積は、基材シートの面積に対して３〜５
０％、特に５〜１５％であることが好ましい。[0010] bonding a single-layer sheet between the adjacent, Ru partially made from the viewpoint of preventing deterioration of texture of the substrate sheet. The bonding area in that case is 3 to 5 with respect to the area of the base sheet.
It is preferably 0%, particularly preferably 5 to 15%.
【手続補正５】[Procedure amendment 5]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００２１[Correction target item name] 0021
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００２１】基材シートは、嵩高さ及び風合いを向上さ
せる点から凹凸賦形されている。凹凸賦形には、例えば
スチールマッチエンボス加工が用いられる。スチールマ
ッチエンボス加工には、一対のエンボスロールが用いら
れる。各エンボスロールには多数の凹凸部が規則的に形
成されている。詳しくは一方のエンボスロールの凸部が
他方のエンボスロールの凹部に嵌合するように、各エン
ボスロールに凹凸部が形成されている。そして、両ロー
ルによって基材シートを押圧することで、基材シートに
凹凸形状が付与される。The substrate sheet, that is uneven shaped from the viewpoint of improving the bulkiness and texture. For example, a steel match embossing process is used for the uneven shaping. For steel match embossing, a pair of embossing rolls is used. Many embossed portions are regularly formed on each embossing roll. More specifically, each embossing roll is provided with an uneven portion such that the projection of one embossing roll fits into the recess of the other embossing roll. Then, the base sheet is pressed by the two rolls, so that the base sheet has an uneven shape.
【手続補正６】[Procedure amendment 6]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００２２[Correction target item name] 0022
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００２２】また、隣り合う凹凸シートが部分的に圧着
又は融着されて、凹凸シート同士が接合された領域が断
続的に又は連続的に形成されることで凹凸シートが一体
化して基材シートを構成している。この場合、前記領域
が略平坦な状態（例えばフィルム状ないしフィルム様の
状態）になる程度まで圧着又は融着されることが、凹凸
シートの十分な一体化の点から好ましい。特に、凹凸シ
ートに熱可塑性樹脂からなる繊維が含有される場合に
は、融着が一層効果的に行われる。圧着又は融着には一
般的な圧延シール機やヒートシール機が用いられる。In addition, the adjacent concavo-convex sheets are partially pressure-bonded or fused, and the region where the concavo-convex sheets are joined is formed intermittently or continuously, so that the concavo-convex sheets are integrated into a base sheet. that make up the. In this case, it is preferable from the viewpoint of sufficient integration of the concavo-convex sheet that the region is pressed or fused to such an extent that the region becomes substantially flat (for example, a film-like or film-like state). In particular, when the uneven sheet contains fibers made of a thermoplastic resin, the fusion is more effectively performed. A common rolling seal machine or heat seal machine is used for pressure bonding or fusion.
【手続補正７】[Procedure amendment 7]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００３３[Correction target item name] 0033
【補正方法】削除[Correction method] Deleted
【手続補正８】[Procedure amendment 8]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００３４[Correction target item name] 0034
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００３４】〔実施例３〕実施例１で用いた単層紙１を
２枚重ね合わせ、これにスチールマッチエンボス加工を
施して凹凸複層紙を得た。この凹凸複層紙に所定パター
ンでヒートシールして２プライの基材シートを得た。そ
の後は実施例１と同様にしてウエットシートを得た。基
材シートの坪量、厚み及び剥離強度を表１に示す。Example 3 Two sheets of single-layer paper 1 used in Example 1 were overlaid, and this was subjected to steel match embossing to obtain an uneven multilayer paper. This irregular multilayer paper was heat-sealed in a predetermined pattern to obtain a two-ply base sheet. Thereafter, a wet sheet was obtained in the same manner as in Example 1. Table 1 shows the basis weight, thickness and peel strength of the base sheet.
【手続補正９】[Procedure amendment 9]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００４０[Correction target item name] 0040
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００４０】[0040]
【表１】 [Table 1]
───────────────────────────────────────────────────── フロントページの続き (72)発明者 川合 隆 栃木県芳賀郡市貝町赤羽2606 花王株式会 社研究所内 (72)発明者 小森 康浩 栃木県芳賀郡市貝町赤羽2606 花王株式会 社研究所内 (72)発明者 種市 祥一 栃木県芳賀郡市貝町赤羽2606 花王株式会 社研究所内 Ｆターム(参考） 4F100 AK42 BA02 BA14 BA25 BA32 DD01 DG01A DG01B DG02 DG10 EC03 EC04 EC18 EJ17 EJ39 EJ82 HB21 JB05A JD14 JD15 JD16 JK06A JK13 YY00A 4L055 AA02 AC06 AF09 AF33 AJ01 AJ07 BE14 BE15 EA07 EA08 EA10 EA14 EA17 EA24 FA11 GA29 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takashi Kawai 2606 Kabane-cho, Akaga-cho, Haga-gun, Tochigi Pref. (72) Inventor Yasuhiro Komori 2606 Kabane-cho, Akaba-cho, Haga-gun, Tochigi Kao Co., Ltd. 72) Inventor Shoichi Taneichi 2606 Akabane, Kaga-cho, Haga-gun, Tochigi Pref. JK13 YY00A 4L055 AA02 AC06 AF09 AF33 AJ01 AJ07 BE14 BE15 EA07 EA08 EA10 EA14 EA17 EA24 FA11 GA29
Claims (6)
含有する、異種又は同種の２層以上のシートを重ね合わ
せた多層構造からなり、層間の剥離強度が５０ｃＮ／７
５ｍｍ以上で、且つ厚みが０．３〜５ｍｍであるウェッ
トシート用基材。1. At least one layer sheet has a multilayer structure in which two or more sheets of different or the same type containing hydrophilic fibers are laminated, and the peel strength between layers is 50 cN / 7.
A base material for a wet sheet having a thickness of 5 mm or more and a thickness of 0.3 to 5 mm.
ットシート用基材。2. The base material for a wet sheet according to claim 1, wherein the base material has irregularities.
又は融着されて、該単層シート同士が接合された領域を
有する請求項１又は２記載のウェットシート用基材。3. The base material for a wet sheet according to claim 1, wherein the adjacent single-layer sheets are partially press-bonded or fused to have a region where the single-layer sheets are joined to each other.
せた１００ｍｍ×１５０ｍｍの大きさ前記ウェットシー
ト用基材を３０枚積み重ね、２４時間放置した後の最上
部から５枚の前記ウェットシート用基材の含水率の平均
値（％）と最下部から５枚の前記ウェットシート用基材
の含水率の平均値（％）との差（後者−前者）が３０以
下である請求項１〜３の何れかに記載のウェットシート
用基材。4. A sheet having a size of 100 mm × 150 mm impregnated with 2.75 times the dry weight of the impregnating liquid, 30 sheets of the wet sheet base material are stacked, and after standing for 24 hours, 5 sheets of the wet sheet from the top are wetted. The difference (the latter-former) between the average value (%) of the moisture content of the sheet base material and the average value (%) of the moisture content of the five lowermost wet sheet substrates from the bottom is 30 or less. The base material for a wet sheet according to any one of 1 to 3.
と他方の表面とでの、液体の含浸若しくは放出、粉体の
担持若しくは被転写面への転写及び／又は拭き取り性能
が略同一である請求項１〜４の何れかに記載のウェット
シート用基材。5. The performance of impregnating or discharging a liquid, transferring a powder to a transfer surface and / or wiping performance on one surface and the other surface of the base material for a wet sheet is substantially the same. The base material for a wet sheet according to claim 1.
シート用基材に液体が含浸されてなるウェットシート。6. A wet sheet comprising the substrate for a wet sheet according to claim 1 impregnated with a liquid.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09647099A JP3148735B2 (en) | 1999-04-02 | 1999-04-02 | Substrate for wet sheet |
| TW89105758A TW438579B (en) | 1999-04-02 | 2000-03-29 | Base material for wiping sheet |
| EP20000106936 EP1041199A3 (en) | 1999-04-02 | 2000-03-31 | Base material for wiping sheet |
| CNB001049518A CN1160502C (en) | 1999-04-02 | 2000-03-31 | Base material of wipe sheet |
| US09/539,791 US7094462B1 (en) | 1999-04-02 | 2000-03-31 | Base material for wiping sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09647099A JP3148735B2 (en) | 1999-04-02 | 1999-04-02 | Substrate for wet sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000290899A true JP2000290899A (en) | 2000-10-17 |
| JP3148735B2 JP3148735B2 (en) | 2001-03-26 |
Family
ID=14165935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09647099A Expired - Fee Related JP3148735B2 (en) | 1999-04-02 | 1999-04-02 | Substrate for wet sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3148735B2 (en) |
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