JP2006000565A - Water soluble cleaning sheet - Google Patents

Water soluble cleaning sheet Download PDF

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JP2006000565A
JP2006000565A JP2004182957A JP2004182957A JP2006000565A JP 2006000565 A JP2006000565 A JP 2006000565A JP 2004182957 A JP2004182957 A JP 2004182957A JP 2004182957 A JP2004182957 A JP 2004182957A JP 2006000565 A JP2006000565 A JP 2006000565A
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water
wiping
sheet
nonwoven fabric
layer
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JP4473053B2 (en
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Shigekazu Nakano
繁一 中野
Teruo Miura
照雄 三浦
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Oji Kinocloth Co Ltd
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Oji Kinocloth Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a water soluble cleaning sheet which is provided with liquid holding property and cushion property to keep sufficient moistness strength without disturbing a cleaning work in the case of a moistness state in the cleaning work and, at the same time, to perfectly clean stain; and property to be drastically rapidly soluble (dissolution by water) with the use of water when brought into contact with a large amount of water after the cleaning work is terminated. <P>SOLUTION: The water soluble cleaning sheet has a structure obtained by laminating a hydrolytic cleaning layer which is made of a sheet excellent in moistness tension strength in the case of the cleaning work and a water soluble support body layer which is made of a non-woven fabric excellent in the liquid holding property and the cushion property. The water soluble cleaning sheet indicates a water solution within the range of 30-1(shaking times) through the use of a method for measuring the water solution of the water soluble cleaning sheet. The method is performed by preparing a cylindrical container having 5.5 length-to-diameter ratio, putting water whose amount is half of the capacity of the container into the container, putting the cleaning sheet with mass which is 1/250 of mass of water into the water, rotating the container by 180°, shaking the container so as to dissolve the sheet, and defining the shaking times till the largeness of the piece of the water soluble cleaning sheet becomes not more than 20 mm as the index of the water solution property. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、水解性清拭用シートに関する。詳しくは、水解性を備え、かつ清拭作業による湿潤時の引張強度に優れる表面清拭層と、水解性を備え、かつ保液性とクッション性に優れた不織布層よりなる支持体層とを積層した構造を有する清拭材として有用な水解性シートに関する。   The present invention relates to a water-decomposable wiping sheet. Specifically, a surface wiping layer having water disintegration and excellent tensile strength when wet by wiping work, and a support layer made of a nonwoven fabric layer having water disintegration and excellent liquid retention and cushioning properties. The present invention relates to a water-decomposable sheet useful as a wiping material having a laminated structure.

従来、使用後に水解処理することができる清拭材として、高圧水ジェット流処理により繊維同士を交絡させた不織布（特許文献１）、極性基を有する繊維を含有した不織布（特許文献２）、繊維状バインダーとしてポリビニルアルコールを用いたパルプ及びレーヨン不織布等の水解シート（特許文献３）等が提案されている。しかし、これらの水解性シートは、シートのボリューム感や剛性に欠けることから、強固な汚れを清拭する際、シートの破れの発生や汚れが残るといった問題があった。
特開２００１−１４６６６３号公報 特許第３１２９１９２合公報 特開平３−２１３５９６号公報 Conventionally, as a wiping material that can be hydrolyzed after use, a nonwoven fabric (Patent Document 1) in which fibers are entangled by high-pressure water jet flow treatment, a nonwoven fabric containing fibers having a polar group (Patent Document 2), fibers Hydrolysis sheets (Patent Document 3) such as pulp and rayon nonwoven fabric using polyvinyl alcohol as a binder have been proposed. However, since these water-decomposable sheets lack the volume feeling and rigidity of the sheet, there is a problem that when the strong dirt is wiped off, the sheet is torn and the dirt remains.
JP 2001-146663 A Japanese Patent No. 3129192 JP-A-3-213596

本発明は、清拭作業時の湿潤状態では清拭作業に支障をきたさない十分な湿潤強度を維持すると同時に、汚れの拭き取り作業を完全に行うことができる優れた保液性とクッション性を備えており、清拭作業終了後には、大量の水と接触させることによって極めて迅速に水によって崩壊（水解）させることができる性質を備えている清拭用の水解性シートを提供することを目的とするものである。   The present invention has an excellent liquid retaining property and cushioning property capable of completely wiping off dirt while maintaining a sufficient wet strength that does not interfere with the wiping operation in a wet state during the wiping operation. The purpose of the present invention is to provide a water-decomposable sheet for wiping that has the property that it can be disintegrated (decomposed) with water very quickly by contacting it with a large amount of water after completion of the wiping operation. To do.

本発明者等は、上記課題を解決するための清拭用シートについて鋭意研究を重ねた結果、清拭作業時には十分な湿潤引張強度を有している水解性に優れたシートよりなる清拭層と、水解性を備え、かつ清拭作業に必要な十分な保液性と優れた作業性をもたらすクッション性を有する不織布よりなる支持体層とを積層することにより上記課題を解決することができる水解性清拭用シートを構成できることを見出し、本発明を完成させた。本発明は下記の各発明を包含する。   As a result of intensive studies on the wiping sheet for solving the above problems, the present inventors have made a wiping layer comprising a sheet having excellent wettability and sufficient wet tensile strength during wiping work. And the above-mentioned problem can be solved by laminating a support layer made of a non-woven fabric having a water disintegrating property and sufficient cushioning property necessary for the wiping operation and a cushioning property that provides excellent workability. It discovered that the sheet | seat for water disintegration wiping could be comprised, and completed this invention. The present invention includes the following inventions.

（１）水解性を備え、かつ清拭作業時における湿潤引張強度に優れたシートよりなる清拭層と、水解性を備え、かつ保液性とクッション性に優れた不織布よりなる支持体層とを積層した構造を有する水解性清拭用シート。 (1) A wiping layer comprising a sheet having water decomposability and excellent wet tensile strength during wiping work, and a support layer comprising a nonwoven fabric having water decomposability and excellent liquid retention and cushioning properties. A sheet for water-disintegrating wiping having a structure in which layers are laminated.

（２）前記清拭層は、前記支持体層の両面に積層されていることを特徴とする（１）項記載の水解性清拭用シート。 (2) The water-decomposable wiping sheet according to item (1), wherein the wiping layer is laminated on both surfaces of the support layer.

（３）長さ／直径比が５．５の円筒型容器に、容器容積の１／２量の水と、水質量の１／２５０倍量の質量の水解性清拭用シートを水中に投入後、１８０°回転、振とうし、崩壊させ、水解性清拭用シート片の大きさが２０ｍｍ以下になるまでの振とう回数を水解性の指標とする水解性清拭用シートの水解度の測定法において、その水解度が３０〜１（振とう回数）の範囲にある水解度を示すことを特徴とする、（１）項又は（２）項に記載の水解性清拭用シート。 (3) Into a cylindrical container having a length / diameter ratio of 5.5, water of 1/2 volume of the container volume and a water-degradable wiping sheet having a mass of 1/250 times the mass of the water are put into water. After that, the degree of water disintegration of the water-decomposable wiping sheet with 180 ° rotation, shaking, disintegration, and the number of shaking until the size of the water-decomposable wiping sheet piece becomes 20 mm or less The water-disintegrating wiping sheet according to item (1) or (2), wherein the water-dissolving rate is in the range of 30 to 1 (number of shakings) in the measurement method.

（４）前記清拭層は、前記水解度が３０〜１（振とう回数）であるスパンレース不織布よりなることを特徴とする（１）項〜（３）項のいずれか１項に記載の水解性清拭用シート。 (4) The wiping layer is made of a spunlace nonwoven fabric having a water disintegration rate of 30 to 1 (the number of shakes), according to any one of items (1) to (3). Water-degradable wiping sheet.

（５）前記支持体層を形成する不織布層がエアレイド法によって形成されている不織布であることを特徴とする（１）項〜（４）項のいずれか１項に記載の水解性清拭用シート。 (5) The water-disintegratable wiping according to any one of (1) to (4), wherein the nonwoven fabric layer forming the support layer is a nonwoven fabric formed by an airlaid method. Sheet.

（６）前記支持体層を形成する不織布層は、バインダー含有量が０．５〜４０質量％であることを特徴とする（１）項〜（５）項のいずれか１項に記載の水解性清拭用シート。 (6) The hydrolysis according to any one of items (1) to (5), wherein the nonwoven fabric layer forming the support layer has a binder content of 0.5 to 40% by mass. Sexual wiping sheet.

本発明の水解製清拭用シートは、湿潤状態での強度に優れていると共に、大量の水によって簡単に崩壊する性質を有していることから、水解状態で下水として排水することができる。   The water-dissolving wiping sheet of the present invention is excellent in strength in a wet state and has a property of easily disintegrating with a large amount of water, and therefore can be drained as sewage in a water-dissolved state.

以下、本発明の水解性清拭用シートについて詳細に説明する。
本発明の水解性清拭用シートは、湿潤状態で汚れを拭き取るための清拭層と、該清拭層に隣接して積層されている保液性とクッション性に優れた支持体層とを有しており、全体が大量の水と接触させた場合に崩壊してそのまま下水として排水できる水解性を備えているシート体を構成している。 Hereinafter, the water-decomposable wiping sheet of the present invention will be described in detail.
The water-decomposable wiping sheet of the present invention comprises a wiping layer for wiping dirt in a wet state, and a support layer excellent in liquid retention and cushioning properties laminated adjacent to the wiping layer. It has a sheet body that is disintegrated and can be drained as sewage as it is when the whole is brought into contact with a large amount of water.

本発明の水解性清拭用シートの全体の厚さや各層それぞれの厚さには特に制限はなく、使用目的に応じて任意に設定することができる。また、水解性清拭用シートの全体及び各層の剛性についても、特に制限はなく、使用目的に応じてそれぞれ任意に設定することができる。   There is no restriction | limiting in particular in the thickness of the whole sheet | seat for water-decomposable wiping of this invention, or each layer, According to the intended purpose, it can set arbitrarily. Moreover, there is no restriction | limiting in particular also about the whole sheet | seat for water-degradable wiping, and the rigidity of each layer, According to the intended purpose, it can each set arbitrarily.

本発明の水解性清拭用シートにおける前記清拭層は、湿潤状態で汚れを拭き取るための作業を支障なく行うことができるように、清拭作業時の湿潤状態において十分な引張強度を有していることと、大量の水と接触させた場合に崩壊してそのまま下水として排水できる水解性を備えていることが必要である。   The wiping layer in the water-decomposable wiping sheet of the present invention has a sufficient tensile strength in the wet state during the wiping operation so that the operation for wiping off dirt in the wet state can be performed without hindrance. It is necessary to have a water disintegrating property that can be disintegrated and discharged as sewage as it is when it comes into contact with a large amount of water.

そのような湿潤状態で汚れを拭き取るための清拭層に用いられるシート材としては、清拭作業時に要求される湿潤状態での引張強度が大きく、かつ水中で優れた崩壊性を示す不織布シートが好ましい。そのような不織布を形成するための材料に特に制限はなく、通常、不織布形成用材料として用いられる、例えば、レーヨン、パルプ、麻、木綿や、ポリエステル、アクリル、ポリプロピレン、ポリビニルアルコール等の合成繊維等が挙げられる。また、その製造方法も湿式法、乾式法を問わないし、さらに必要に応じ、ポリビニルアルコール等のバインダーや、消臭材等の機能性粉体が、塗布又は添加されても良い。しかし、長繊維を水流交絡させて形成されているスパンボンド不織布が湿潤状態での引張強度が大きく、かつ水中で良好な崩壊性を示すことから、特に好ましい。   As a sheet material used for a wiping layer for wiping off dirt in such a wet state, a nonwoven fabric sheet having a high tensile strength in a wet state required during the wiping operation and exhibiting excellent disintegration in water is used. preferable. The material for forming such a nonwoven fabric is not particularly limited, and is usually used as a nonwoven fabric-forming material, for example, rayon, pulp, hemp, cotton, synthetic fibers such as polyester, acrylic, polypropylene, polyvinyl alcohol, etc. Is mentioned. Moreover, the manufacturing method does not ask | require a wet method and a dry method, Furthermore, functional powders, such as binders, such as polyvinyl alcohol, and a deodorizing material, may be apply | coated or added as needed. However, a spunbond nonwoven fabric formed by hydroentangling long fibers is particularly preferable because it has a high tensile strength in a wet state and exhibits good disintegration in water.

本発明の水解性清拭用シートにおける清拭層は、前記支持体層の片面のみに積層されていても良いし、また、両面に形成されていてもよい。清拭層を支持体層の両面に形成する場合は、一方又は双方に清拭層に許容される範囲内で抗菌剤や芳香剤等の各種薬剤を含有せしめることができる。また、そのような各種薬剤を含有せしめた層を識別可能とするために、両清拭層の一方又は双方を着色剤によって着色されている層とすることもできる。   The wiping layer in the water-decomposable wiping sheet of the present invention may be laminated only on one side of the support layer, or may be formed on both sides. When forming a wiping layer on both surfaces of a support body layer, various chemical | medical agents, such as an antibacterial agent and an aromatic agent, can be contained in the range permitted to a wiping layer in one or both. In addition, in order to make it possible to identify a layer containing such various drugs, one or both of the wiping layers can be a layer colored with a colorant.

本発明の水解性清拭用シートにおける前記支持体層は、湿潤状態で汚れを拭き取るための作業を支障なく行うことができるような十分な保液性と、清拭作業性を良好ならしめるクッション性とを合わせ備えているものであることが好ましい。また、大量の水と接触させた場合に簡単に崩壊してそのまま下水として排水できる水解性を備えていることが必要である。そのような支持体層に用いられる不織布としては、例えば、レーヨン、パルプ、麻、木綿や、ポリエステル、アクリル、ポリプロピレン、ポリビニルアルコール等の合成繊維等を使用して形成されて不織布が挙げられるが、クッション性と水解性に特に優れていることから、エアレイド不織布が特に好ましい。   The support layer in the water-decomposable wiping sheet of the present invention has a sufficient liquid retaining property so that the work for wiping off dirt in a wet state can be performed without hindrance, and a cushion for improving the wiping workability. It is preferable that it is equipped with the property. Moreover, it is necessary to have a water disintegrating property that can be easily disintegrated and drained as sewage as it is when brought into contact with a large amount of water. Examples of the nonwoven fabric used in such a support layer include, for example, a nonwoven fabric formed using synthetic fibers such as rayon, pulp, hemp, cotton, polyester, acrylic, polypropylene, polyvinyl alcohol, and the like. Airlaid nonwoven fabrics are particularly preferred because they are particularly excellent in cushioning properties and water decomposability.

エアレイド不織布には、例えば、繊維状、または粉体状の形状を有しており、加熱により軟化し、接着機能を発揮する熱融着型バインダーが用いられていることが好ましい。ここで繊維状バインダーとは、芯鞘型、サイドバイサイド型等の複合型繊維タイプ、又は単一型繊維のバインダーを指す。 支持体としてのエアレイド不織布に用いるバインダーの含有量は、該バインダーを含有する上記不織布の全重量に対して０．５〜４０質量％、好ましくは１〜２０質量％、更に好ましくは３〜１０質量％である。該バインダーの含有量が１質量％未満であると十分なシート強度が得られず、一方４０質量％を超えると水解性能が低下する（水解しない）ことがある。
エアレイド不織布は、必要に応じて、パフ状〜板状まで剛性を調整することができる。さらに、エアレイド不織布には、ポリビニルアルコール等の液状バインダーの塗布や、消臭材等の機能性粉体の添加をすることも可能である。 For the airlaid nonwoven fabric, it is preferable to use a heat-fusing binder that has, for example, a fibrous or powdery shape, is softened by heating, and exhibits an adhesive function. Here, the fibrous binder refers to a composite fiber type such as a core-sheath type or a side-by-side type, or a binder of a single type fiber. The content of the binder used in the air-laid nonwoven fabric as the support is 0.5 to 40 mass%, preferably 1 to 20 mass%, more preferably 3 to 10 mass%, based on the total weight of the nonwoven fabric containing the binder. %. When the content of the binder is less than 1% by mass, sufficient sheet strength cannot be obtained. On the other hand, when the content exceeds 40% by mass, the water decomposing performance may be deteriorated (not hydrolyzed).
The air-laid nonwoven fabric can be adjusted in rigidity from puff to plate as necessary. Furthermore, it is also possible to apply a liquid binder such as polyvinyl alcohol or a functional powder such as a deodorant to the airlaid nonwoven fabric.

以下、実施例に基づいて本発明を説明するが、本発明はこれら実施例に限定されるものではない。以下に示す実施例等で作成された不織布の各物性値は、以下の方法によって測定あるいは評価を行った。
なお、本発明において、不織布の特性の物性値は、特に限定しない限り、サンプル数５の平均値である。 EXAMPLES Hereinafter, although this invention is demonstrated based on an Example, this invention is not limited to these Examples. Each physical property value of the nonwoven fabric prepared in the following examples and the like was measured or evaluated by the following method.
In addition, in this invention, the physical-property value of the characteristic of a nonwoven fabric is an average value of 5 samples, unless it limits in particular.

《引張強度》
テンシロンＵＴＭ−ＩＩＩ−１００（ＴＯＹＯ ＢＡＬＤＷＩＮ ＣＯ．，ＬＴＤ）を用いて、シートサンプルの強度を測定した。 <Tensile strength>
The strength of the sheet sample was measured using Tensilon UTM-III-100 (TOYO BALDWIN CO., LTD).

《厚さ》
厚さ計（テクロック製，測定圧 １０ｇ／ｃｍ2）を用いて、厚さを測定した。
《剛性》
図１に示す専用治具を用いて、シートサンプル（１００×３００ｍｍ）を片側１００ｍｍ固定し、もう一方を自重で垂れ下げ、固定された高さから垂れ下がった先端までの垂直長さを測定した。 "thickness"
The thickness was measured using a thickness meter (manufactured by Teclock, measurement pressure 10 g / cm 2 ).
"rigidity"
Using a dedicated jig shown in FIG. 1, a sheet sample (100 × 300 mm) was fixed to 100 mm on one side, the other was suspended by its own weight, and the vertical length from the fixed height to the suspended tip was measured.

《水解性》
水解性の測定は、長さ／直径比が５．５の円筒型容器に、容器容積の１／２量の水と、水質量の１／２５０倍量の質量のシートを水中に投入後、１８０°回転、振とうし、崩壊（水解）したシートの大きさが２０ｍｍ以下になるまでの振とう回数を水解性の指標とした。
《清拭性》
流し台など水まわりの汚れにつき、清拭作業を行い目視で判断した。 《Water decomposability》
The measurement of water disintegration is carried out after throwing a sheet of water of 1/2 volume of the container volume and a mass of 1/250 times the mass of water into a cylindrical container having a length / diameter ratio of 5.5, The number of shaking until the size of the sheet rotated 180 °, shaken, and collapsed (hydrolysis) was 20 mm or less was used as an index of water disintegration.
《Cleanability》
The stains around the water, such as a sink, were wiped off and judged visually.

実施例１
繊維長７ｍｍ、平均繊維径１５μｍのレーヨン繊維７０％と針葉樹パルプ３０％からなる混合物に高圧ジェット水流を用いて作成したスパンレース不織布５０ｇ／ｍ2、厚さ０．２ｍｍを清拭層とし、エアレイド法にて、清拭層を表裏とする米坪２００ｇ／ｍ2、厚さ２ｍｍの積層不織布を作成した。
中間層となる支持体層の作成は、針葉樹パルプと、バインダーとして繊維径１５μｍ以下のパルプ状ポリエチレン、及び粉体ポリエチレンを用いた。バインダー含有量は上記不織布の全質量に対して５質量％となるようにした。 Example 1
Fiber length 7 mm, average fiber 70% rayon fibers of diameter 15μm and spun lace nonwoven fabric 50 g / m 2 made using a high pressure water jet to a mixture consisting of 30% softwood pulp, the thickness 0.2mm and Qing拭層, airlaid By the method, a laminated nonwoven fabric having a surface area of 200 g / m 2 and a thickness of 2 mm with the wiping layer as the front and back was prepared.
The support layer serving as the intermediate layer was prepared using softwood pulp, pulp-like polyethylene having a fiber diameter of 15 μm or less, and powdered polyethylene as a binder. The binder content was 5% by mass relative to the total mass of the nonwoven fabric.

実施例２
中間層となる支持体層の作成は、針葉樹パルプと、天然麻、バインダーとして平均繊維径２０μｍのポリエステル／ポリエチレン芯鞘バインダーと、粉体ポリエチレンを用いた。バインダー含有量は上記不織布の全質量に対して１０質量％、天然麻は２０質量％になるようにした。
上記以外は、実施例１と同様にして、清拭層を表裏とする米坪４００ｇ／ｍ2、厚さ３ｍｍの積層不織布を作成した。 Example 2
The support layer serving as the intermediate layer was prepared by using softwood pulp, natural hemp, a polyester / polyethylene core-sheath binder having an average fiber diameter of 20 μm as a binder, and powdered polyethylene. The binder content was 10% by mass with respect to the total mass of the nonwoven fabric, and natural hemp was 20% by mass.
Except for the above, in the same manner as in Example 1, a laminated nonwoven fabric having a surface area of 400 g / m 2 and a thickness of 3 mm was used.

実施例３
中間層となる支持体層の作成は、針葉樹パルプと、バインダーとして平均繊維径２０μｍのポリエステル／ポリエチレン芯鞘バインダーと、粉体ポリエチレンを用いた。バインダー含有量は上記不織布の全質量に対して２５質量％になるようにした。
上記以外は、実施例１と同様にして、清拭層を表裏とする米坪５００ｇ／ｍ2、厚さ５ｍｍの積層不織布を作成した。 Example 3
The support layer serving as the intermediate layer was prepared using softwood pulp, a polyester / polyethylene core-sheath binder having an average fiber diameter of 20 μm and powdered polyethylene as binders. The binder content was 25% by mass relative to the total mass of the nonwoven fabric.
Other than the above, in the same manner as in Example 1, a laminated nonwoven fabric having a surface area of 500 g / m 2 and a thickness of 5 mm was used.

実施例４
中間層となる支持体層の作成は、針葉樹パルプと、バインダーとして平均繊維径２０μｍのポリエステル／ポリエチレン芯鞘バインダーと、粉体ポリエチレンを用いた。バインダー含有量は上記不織布の全質量に対して３質量％になるようにした。
上述記載以外は、実施例１と同様にして、Ａ層を表裏とする米坪１５００ｇ／ｍ2、厚さ１０ｍｍの積層不織布を作成した。 Example 4
The support layer serving as the intermediate layer was prepared using softwood pulp, a polyester / polyethylene core-sheath binder having an average fiber diameter of 20 μm and powdered polyethylene as binders. The binder content was 3% by mass relative to the total mass of the nonwoven fabric.
Except for the above description, a laminated nonwoven fabric having a surface area of 1500 g / m 2 and a thickness of 10 mm was prepared in the same manner as in Example 1.

比較例１
天然パルプで構成され、湿式法で製造されたトイレットペーパー用シート２０ｇ／ｍ2、厚さ０．１ｍｍを清拭層とした以外は、実施例４と同様にして、清拭層を表裏とする米坪１５００ｇ／ｍ2、厚さ１０ｍｍの積層不織布を作成した。 Comparative Example 1
The wiping layer is the front and back in the same manner as in Example 4 except that the toilet paper sheet 20 g / m 2 made of natural pulp and manufactured by a wet method has a thickness of 0.1 mm. A laminated nonwoven fabric having a weight of 1,500 g / m 2 and a thickness of 10 mm was prepared.

比較例２
ポリビニルアルコールを含有する不織布（繊維長３ｍｍのレーヨン４５質量％、繊維長３ｍｍのポリビニルアルコール１０％、針葉樹パルプ４５％）１２０ｇ／ｍ2、厚さ１ｍｍを用意して評価した。 Comparative Example 2
Nonwoven fabric containing polyvinyl alcohol (fiber length 3mm Rayon 45% by weight of polyvinyl 10% alcohol fiber length 3mm, 45% softwood pulp) 120 g / m 2, was evaluated by preparing a thickness of 1 mm.

比較例３
実施例１において、清拭層として使用したスパンレース不織布を評価した。各実施例及び比較例のものについての各測定データを表１に示す。 Comparative Example 3
In Example 1, the spunlace nonwoven fabric used as the wiping layer was evaluated. Table 1 shows the measurement data for the examples and comparative examples.

Figure 2006000565
Figure 2006000565

表１の比較例１のデータから、湿潤時の強度が低いシートを清拭層に使用した場合、清拭時の摩擦により表面に破れが生じるため、清拭材にボリュームがあっても清拭性が劣ることが分かる。
比較例２は、清拭層にボリュームがない場合、シート自体の湿潤強度が高くなると水解度が大幅に低下するため、不適であることがわかり、また、比較例３は、逆に水解度を優先すると、清拭性が低下することを示している。
一方、本発明の不織布に関しては、高い水解性を維持しつつも、剛性が大きくなることから清拭性に優れ、水解性・清拭性という二律背反する性質について、有用であることが分かる。 From the data of Comparative Example 1 in Table 1, when a sheet with low strength when wet is used for the wiping layer, the surface is torn due to friction during wiping. It turns out that the nature is inferior.
Comparative Example 2 was found to be inappropriate when the wiping layer had no volume, as the wet strength of the sheet itself increased significantly, and the water solubility decreased significantly. When priority is given, it indicates that the wiping property is lowered.
On the other hand, it can be seen that the nonwoven fabric of the present invention is useful for the contradictory properties of water disintegration and wiping because it has high wiping property while maintaining high water disintegrating property, and thus has excellent wiping property.

図１は、本発明の不織布の剛性を測定する専用治具の概要を示す図である。FIG. 1 is a diagram showing an outline of a dedicated jig for measuring the rigidity of the nonwoven fabric of the present invention.

Claims (6)

水解性を備え、かつ清拭作業時における湿潤引張強度に優れたシートよりなる清拭層と、水解性を備え、かつ保液性とクッション性に優れた不織布よりなる支持体層とを積層した構造を有する水解性清拭用シート。 A wiping layer made of a sheet having water disintegrating properties and excellent wet tensile strength during wiping work and a support layer made of a nonwoven fabric having water disintegrating properties and excellent liquid retention and cushioning properties were laminated. A water-disintegratable wiping sheet having a structure. 前記清拭層は、前記支持体層の両面に積層されていることを特徴とする請求項１記載の水解性清拭用シート。 The water-decomposable wiping sheet according to claim 1, wherein the wiping layer is laminated on both surfaces of the support layer. 長さ／直径比が５．５の円筒型容器に、容器容積の１／２量の水と、水質量の１／２５０倍量の質量の水解性清拭用シートを水中に投入後、１８０°回転、振とうし、崩壊させ、水解性清拭用シート片の大きさが２０ｍｍ以下になるまでの振とう回数を水解性の指標とする水解性清拭用シートの水解度の測定法において、その水解度が３０〜１（振とう回数）の範囲にある水解度を示すことを特徴とする、請求項１又は請求項２に記載の水解性清拭用シート。 Into a cylindrical container having a length / diameter ratio of 5.5, water of 1/2 volume of the container volume and a water disintegrating wiping sheet having a mass of 1/250 times the mass of the water are put into water, and then 180 In the method of measuring the water disintegration degree of a water disintegrating wiping sheet, the number of shaking until the size of the water disintegrating wiping sheet piece is 20 mm or less is rotated, shaken, and collapsed. The water-decomposable wiping sheet according to claim 1 or 2, wherein the water-decomposition degree is 30 to 1 (the number of shaking times). 前記清拭層は、前記水解度が３０〜１（振とう回数）であるスパンレース不織布よりなることを特徴とする請求項１〜請求項３のいずれか１項に記載の水解性清拭用シート。 The said wiping layer consists of a spunlace nonwoven fabric whose said water disintegration degree is 30-1 (the frequency | count of shaking), The water-decomposable wiping for any one of Claims 1-3 characterized by the above-mentioned. Sheet. 前記支持体層を形成する不織布層がエアレイド法によって形成されている不織布であることを特徴とする請求項１〜請求項４のいずれか１項に記載の水解性清拭用シート。 The water-decomposable wiping sheet according to any one of claims 1 to 4, wherein the nonwoven fabric layer forming the support layer is a nonwoven fabric formed by an airlaid method. 前記支持体層を形成する不織布層は、バインダー含有量が０．５〜４０質量％であることを特徴とする請求項１〜請求項５のいずれか１項に記載の水解性清拭用シート。

The water disintegrable wiping sheet according to any one of claims 1 to 5, wherein the nonwoven fabric layer forming the support layer has a binder content of 0.5 to 40% by mass. .

JP2004182957A 2004-06-21 2004-06-21 Water-degradable wiping sheet Expired - Lifetime JP4473053B2 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007080860A1 (en) * 2006-01-16 2007-07-19 Kinsei Seishi Co., Ltd. Sheet-like water-disintegratable cleaner
WO2009014202A1 (en) 2007-07-26 2009-01-29 Alcare Co., Ltd. Water-disintegrable sheet and pouch made of the same for excreta-holding wear
US9005738B2 (en) 2010-12-08 2015-04-14 Buckeye Technologies Inc. Dispersible nonwoven wipe material
US9439549B2 (en) 2010-12-08 2016-09-13 Georgia-Pacific Nonwovens LLC Dispersible nonwoven wipe material

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007080860A1 (en) * 2006-01-16 2007-07-19 Kinsei Seishi Co., Ltd. Sheet-like water-disintegratable cleaner
JP5067803B2 (en) * 2006-01-16 2012-11-07 金星製紙株式会社 Sheet water disintegrating cleaner
WO2009014202A1 (en) 2007-07-26 2009-01-29 Alcare Co., Ltd. Water-disintegrable sheet and pouch made of the same for excreta-holding wear
US9005738B2 (en) 2010-12-08 2015-04-14 Buckeye Technologies Inc. Dispersible nonwoven wipe material
US9314142B2 (en) 2010-12-08 2016-04-19 Georgia-Pacific Nonwovens LLC Dispersible nonwoven wipe material
US9439549B2 (en) 2010-12-08 2016-09-13 Georgia-Pacific Nonwovens LLC Dispersible nonwoven wipe material
US9661974B2 (en) 2010-12-08 2017-05-30 Georgia-Pacific Nonwovens LLC Dispersible nonwoven wipe material
EP3199682A1 (en) * 2010-12-08 2017-08-02 Georgia-Pacific Nonwovens LLC Dispersible nonwoven wipe material
US10045677B2 (en) 2010-12-08 2018-08-14 Georgia-Pacific Nonwovens LLC Dispersible nonwoven wipe material
US10405724B2 (en) 2010-12-08 2019-09-10 Georgia-Pacific Nonwovens LLC Dispersible nonwoven wipe material
EP2463425B1 (en) * 2010-12-08 2021-02-24 Georgia-Pacific Nonwovens LLC Dispersible nonwoven wipe material
US10973384B2 (en) 2010-12-08 2021-04-13 Georgia-Pacific Mt. Holly Llc Dispersible nonwoven wipe material

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