JP3722583B2 - Absorbent articles - Google Patents

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JP3722583B2
JP3722583B2 JP09070797A JP9070797A JP3722583B2 JP 3722583 B2 JP3722583 B2 JP 3722583B2 JP 09070797 A JP09070797 A JP 09070797A JP 9070797 A JP9070797 A JP 9070797A JP 3722583 B2 JP3722583 B2 JP 3722583B2
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Prior art keywords
fiber
water
fibers
absorbent
pulp
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JPH10277086A (en
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孝夫 笠井
敦子 柳沢
雅則 湊
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Kao Corp
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Kao Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、吸収性物品、特に使い捨ておむつ、生理用ナプキン等の薄型の吸収性物品に関する。
【0002】
【従来の技術】
紙おむつ、生理用ナプキン、失禁者用パッド等の吸収性物品は、主として中心部に配された、身体から***される尿、経血などの体液を吸収、保持する吸収体と、身体に接する側に配された柔軟な液透過性の表面シートと、身体と接する反対側に配された液不透過性の裏面シートとを有している。吸収体は通常パルプ繊維と吸水性ポリマーから構成されている。吸収性物品は、不織布を通して入ってきた尿等をパルプ繊維で一時的に保持した後、吸水性ポリマーで体液を保持する。この際に吸水性ポリマーは膨潤し、吸収体の体積が増加する。一般に吸収体の吸水性を向上させるために吸水性ポリマー量を増やすことを行なった場合、吸収体中のパルプ量は相対的に減少し、その絡みが少なくなるため、吸水性ポリマーが膨潤した際に、装着者の動きの中で圧縮や剪断力がかかると、吸収体が割れたり、偏ったりして吸収阻害の原因となる。
【0003】
このような吸収阻害を防止する方法としては、熱溶融繊維をパルプ繊維中に混ぜ込むことで熱溶融繊維同士、及びパルプ繊維と熱溶融繊維との間に接着力を発現させ、保形性を向上させる方法が採られている。熱溶融繊維を混合し吸収体の形状安定化を向上させる提案としては、特開昭63−92701号公報、特開昭63−318941号公報、特開昭63−260555号公報及び特開平2−74254号公報等がある。
【0004】
【発明が解決しようとする課題】
しかしながら、吸収体の保形性のために用いられる熱溶融繊維の混入は、熱溶融繊維自体が疎水性であるため、吸収性阻害のおそれがある。
また、生産ライン上に熱溶融システムが必要とされ、溶融時間との兼ね合いで、生産速度が拘束されてしまう。更に、熱溶融繊維の配合種、量、溶融温度によっては、吸収体が硬く成り過ぎて、吸水性ポリマーの膨潤を阻害したり、風合いの面で問題を生じたりするおそれがある。
従って、本発明の目的は、熱処理工程などを必要とせずに、体液吸収時の吸収体形状を安定に維持し、吸収阻害が無く、更に風合いにも優れた薄型の吸収性物品を提供することにある。
【0005】
【課題を解決するための手段】
本発明者らは、鋭意検討を重ねた結果、吸収体を構成するパルプ繊維内に、20℃の水中での収縮率が特定の範囲にある繊維を分散させることにより、上記目的が達成することを知見した。
本発明は、上記知見に基づきなされたもので、液透過性の表面シートと液不透過性の裏面シートと、これら両シート間に介在する液保持性の吸収体とを有し、該吸収体が主にパルプ繊維と吸水性ポリマーを主体としている吸収性物品において、20℃の水中で10〜50%の収縮率を示す親水性繊維(以下、繊維ともいう)が、上記吸収体の上記パルプ繊維内に分散しており、該親水性繊維が、繊維長15〜30mmのポリビニルアルコール繊維であることを特徴とする吸収性物品を提供するものである。
【0006】
【作用】
上記吸収体が体液を吸収すると、上記20℃の水中での収縮率が10〜50%である繊維が体液中の水により適度に可塑化、収縮し、この繊維同士及びパルプ繊維との間に絡み合いを発現することにより、体液吸収時の吸収体形状が安定に維持されると考えられる。
また、熱溶融繊維を混合する方法と異なり、この繊維自体が親水性であることと、吸収体が体液を吸収して吸水性ポリマーが膨潤するのとほぼ同時に該繊維が絡み合いを発現することのために、吸水性ポリマーの膨潤を妨げる等の吸収阻害を生じることもなく、パルプ使用量を低減した薄型の吸収性物品も十分な吸収体形状安定化の効果が得られる。
【0007】
【発明の実施の形態】
上記パルプ繊維内に分散させる上記繊維は、20℃の水中での収縮率が10〜50%、好ましくは20〜40%である。
上記繊維の収縮率が10%未満であると繊維同士あるいはパルプ繊維との絡み合いが十分発現されず、十分な強度が得られない。また、50%を超えるものは環境の影響を受けやすく、その結果、パルプ中に混合する際にダマになりやすく、十分な強度が得られない。即ち、強度のある部分とない部分が生じ、弱い部分が破壊することになる。
【0008】
上記繊維の収縮率は下記の方法によって測定される。
即ち、JIS L 1015−1992 化学繊維ステープル試験方法 に準拠して行う。具体的に図1を参照して説明すると、幅約10mm、長さ20mmの窓2を開けた長方形の薄紙1(幅約5mm、長さ約50mm、厚さ0.2mm)に単繊維3を、そのたるみをとるために、ごく軽い張力をかけて張り、両端を接着剤4で固定する。次に窓2の長さ方向の中央部付近で、薄紙1を点線5で示される幅方向に切断した後、水中に5分間浸漬する。その後濾紙で水切りをした後、たるみをとる程度に張力をかけて繊維長(L2 )を測定し下記数式(1)により収縮率を測定する。
【0009】
【数1】

Figure 0003722583
【0010】
上記の20℃の水中で10〜50%の収縮率を有する繊維の繊維長は、15〜30mである。繊維長が10mmよりも短いと十分な湿潤強度が得られない。一方、繊維長が100mmを超えると繊維自身の絡まりが生じ、吸収体に均等に混合されず、同様に強度が得られない。
また、上記20℃の水中で10〜50%の収縮率を有する繊維の繊維径は、好ましくは0.1〜10デニール、より好ましくは0.5〜5デニールである。繊維径が0.1デニールに満たないと繊維自身の強度が弱いため添加の効果が十分得られず、また、繊維径が10デニールを超えると繊維同士の絡み合いが少なく、同様に強度が得られない。また、上記20℃の水中で10〜50%の収縮率を有する繊維は、繊維同士の絡み合いを増すために捲縮をかけてもよい。
【0011】
20℃の水中での収縮率が10〜50%である繊維としては、親水性のものが用いられ、なかでも、強度向上の効果や品質の安定性からポリビニルアルコールが用いられる。また、ポリビニルアルコールはマレイン酸やイタコン酸等で変性されたものでもよい。上記親水性繊維の含有量は、上記パルプ繊維に対して1〜50重量%であることが好ましく、3〜30重量%であることがより好ましい。
【0012】
20℃の水中での収縮率を10〜50%とするには、例えばポリビニルアルコール繊維であれば、その分子量、ケン化度、結晶化度等を変化させることにより、制御可能であり、その様な繊維は、例えば、クラレビニロン、クレモナ〔いずれも、クラレ(株)製〕、ユニチカビニロン〔ユニチカ(株)製〕、ソルブロン、ニチビロン〔いずれも、ニチビ(株)製〕等の商品名で市販されている。
【0013】
パルプ繊維は、吸収体に従来から用いられているものであれば特に制限はないが、そのパルプ繊維の平均繊維長は、粉砕、積層、圧縮処理等を考慮すると、通常0.8〜3mmの範囲にあることが望ましい。吸水性ポリマーは、吸収体に従来から用いられているものであれば特に制限はされないが、本発明では特に高吸水性ポリマーを用いることが望ましく、高吸水性ポリマーの液吸収率は、20w/w以上であることが望ましい。具体的な吸水性ポリマーとしては、ポリアクリル酸ソーダ、アクリル酸−ビニルアルコール共重合体、ポリアクリル酸ソーダ架橋体、デンプン−アクリル酸グラフト重合体、イソブチレン−無水マレイン酸共重合体又はそのケン化物、ポリアクリル酸カリウム、ポリアクリル酸セシウム等の粉末が好適である。吸水性ポリマーはパルプ繊維に対して、100〜500重量%、特に120〜300重量%であることが望ましく、この範囲で用いると、吸収体の体液吸収が充分であると共に、吸収体の保形性が充分に維持される。
【0014】
本発明の上記吸収性物品の表面シートは、液透過性を十分に有するものであれば特に制限はなく、例えば、織布、不織布、または多孔性シート等が挙げられ、その素材としては、レーヨン、ポリエステル、ポリエチレン、ポリプロピレン等が挙げられる。裏面シートは、吸収性物品に従来から用いられている液不透過性のシートであれば特に制限されることはないが、熱可塑性樹脂にフィラーを加えて延伸した液不透過性で且つ蒸気を透過させる蒸気透過性のシート等が好ましく、さらに、上記シートと不織布との複合材等も用いることができる。
【0015】
また、本発明の上記吸収性物品は、それ自体公知の方法で製造することができる。また、下記の実施例を参照すれば、当業者は本発明の吸収性物品を容易に製造することができるであろう。
【0016】
【実施例】
以下実施例により、本発明を具体的に説明するが、本発明は実施例によって制限されるものではない。
【0017】
(1)使い捨ておむつの作製
〔実施例1〕
坪量15g/m2 のティッシュ上に、解繊されたパルプ繊維60重量部と、20℃の水中での収縮率が30%であるポリビニルアルコール(PVA)繊維(重合度2400、完全ケン化物、1.5デニール、20mmカット品)5重量部および高吸水性ポリマー100重量部を均一混合し、坪量250g/m2 で積層し、上記ティッシュで包み込んで吸収体を得た。得られた吸収体に、表面材としてポリエチレン繊維からなる坪量25g/m2 の不織布を、また、裏面シートとしてポリエチレンシートを配し、使い捨ておむつを得た。
【0018】
〔実施例2〕
実施例1におけるPVA繊維を熱処理し、20℃の水中での収縮率を15%に変化させたもの(1.5デニール、15mmカット品)を10重量部を用いた以外は、実施例1と同様にして、使い捨ておむつを得た。
【0021】
〔実施例
実施例1におけるPVA繊維として、別のPVA繊維(重合度1700、完全ケン化物、20℃の水中での収縮率25%、繊度1.5デニール、20mmカット品)を用いた以外は、実施例1と同様にして、使い捨ておむつを得た。
【0022】
〔比較例1〕
実施例1で用いたPVA繊維の代わりに、ナイロン繊維(1.5d、15mmカット品、20℃での水中での収縮率≒0%)を用いた以外は、実施例1と同様にして、使い捨ておむつ用吸収体を得た。
【0023】
〔比較例2〕
実施例2で用いたPVA繊維の代わりに、ポリエチレン繊維(2d、10mmカット品、融点100℃、20℃の水中での収縮率≒0%)を用いて、同様に吸収体を作成し、表面温度140℃の熱エンボスロールで熱処理した以外は、実施例1と同様にして、使い捨ておむつ用吸収体を得た。
【0024】
〔比較例3〕
実施例1で用いたPVA繊維の代わりに、部分ケン化PVA繊維(重合度1700、ケン化度88.9、20mmカット品、20℃での水中での収縮率65%)を用いた以外は、実施例1と同様にして、使い捨ておむつ用吸収体を得た。
【0025】
(2)使い捨ておむつの評価
実施例1〜、及び比較例1〜3の使い捨ておむつの各々について、一般のモニター20人に対して計200枚の使用テストを実施し、全おむつに対する尿漏れが生じたおむつの割合を求めた。また、使用後のおむつを回収し、吸収体の破壊の状態を観察し、全おむつに対する吸収体が破壊したおむつの割合を求めた。
【0026】
【表1】
Figure 0003722583
【0027】
以上の実施例、比較例の結果から以下のことが明らかである。
(イ)パルプ繊維に本発明で特定された水に対する収縮性を示す繊維を含有させた吸収体から構成される使い捨ておむつ(実施例1〜)は、尿漏れが僅かであると共に吸収体の破壊も僅かである。
(ロ)一方、本発明で特定された収縮率を示さないナイロン繊維(比較例1)、PVA繊維(比較例3)を含有させた場合は、尿漏れの割合が大であると共に、吸収体の破壊の割合も大である。
(ハ)本発明で特定された収縮性を示さないPE繊維を含有させ、かつ熱融着処理を行った吸収体から構成される使い捨ておむつ(比較例2)は、吸収体の破壊は僅かであるが、尿漏れの割合が大である。
【0028】
【発明の効果】
本発明の吸収体物体は、体液吸収時の吸収体形状を安定に維持し、吸収阻害が無く、風合いにも優れる。
【図面の簡単な説明】
【図1】 20℃の水中での繊維の収縮率を測定する操作を説明するための模式図である。
【符号の説明】
1 薄紙
2 窓
3 繊維
4 接着剤
5 切断線[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an absorbent article, particularly a thin absorbent article such as a disposable diaper and a sanitary napkin.
[0002]
[Prior art]
Absorbent articles such as disposable diapers, sanitary napkins, and incontinence pads are mainly placed in the center of the absorbent body that absorbs and retains body fluids excreted from the body, such as urine and menstrual blood, and the side in contact with the body A flexible liquid-permeable top sheet, and a liquid-impermeable back sheet placed on the opposite side in contact with the body. The absorber is usually composed of pulp fibers and a water-absorbing polymer. The absorbent article temporarily holds urine or the like that has entered through the nonwoven fabric with pulp fibers, and then holds the body fluid with the water-absorbing polymer. At this time, the water-absorbing polymer swells and the volume of the absorber increases. In general, when the amount of the water-absorbing polymer is increased in order to improve the water-absorbing property of the absorbent body, the amount of pulp in the absorbent body is relatively reduced and the entanglement is reduced. In addition, when compression or shear force is applied during the movement of the wearer, the absorbent body is cracked or biased, causing absorption inhibition.
[0003]
As a method for preventing such absorption inhibition, the heat melting fiber is mixed into the pulp fiber to develop an adhesive force between the heat melting fibers and between the pulp fiber and the heat melting fiber, thereby maintaining the shape retention. The method of improving is taken. As proposals for improving the stabilization of the shape of the absorber by mixing hot melt fibers, JP-A 63-92701, JP-A 63-318941, JP-A 63-260555 and JP-A-2- No. 74254.
[0004]
[Problems to be solved by the invention]
However, the mixing of hot melt fibers used for the shape retention of the absorbent body may cause absorption inhibition because the hot melt fibers themselves are hydrophobic.
Further, a heat melting system is required on the production line, and the production speed is restricted in consideration of the melting time. Furthermore, depending on the blending type, amount, and melting temperature of the hot-melt fiber, the absorbent body may become too hard, which may hinder the swelling of the water-absorbing polymer or cause a problem in terms of texture.
Accordingly, an object of the present invention is to provide a thin absorbent article that does not require a heat treatment step, stably maintains the shape of the absorbent body when absorbing body fluid, has no inhibition of absorption, and has an excellent texture. It is in.
[0005]
[Means for Solving the Problems]
The present inventors have made intensive studies, within the pulp fibers constituting the absorbent body, by the shrinkage in water of 20 ° C. to disperse the fibers in a specific range, the object is achieved I found out.
The present invention has been made based on the above knowledge, and has a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-holding absorber interposed between the two sheets. In an absorbent article mainly composed of pulp fibers and a water-absorbing polymer, hydrophilic fibers (hereinafter also referred to as fibers) exhibiting a shrinkage of 10 to 50% in water at 20 ° C. are the pulps of the absorber. The absorbent article is dispersed in a fiber, and the hydrophilic fiber is a polyvinyl alcohol fiber having a fiber length of 15 to 30 mm .
[0006]
[Action]
When the absorbent body absorbs the body fluid, the fiber having a shrinkage rate of 10 to 50% in the water at 20 ° C. is appropriately plasticized and contracted by the water in the body fluid, and between the fibers and the pulp fiber. By expressing the entanglement, it is considered that the shape of the absorbent body during body fluid absorption is stably maintained.
Further, unlike the method of mixing the hot-melt fiber, the fiber itself is hydrophilic, and the fiber develops entanglement almost simultaneously with the absorption of the body fluid and the water-absorbing polymer swelling. Therefore, absorption inhibition such as preventing the swelling of the water-absorbing polymer is not caused, and a thin absorbent article with a reduced amount of pulp used can also provide a sufficient effect of stabilizing the absorbent body shape.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The fiber to be dispersed in the pulp fiber has a shrinkage rate in water of 20 ° C. of 10 to 50%, preferably 20 to 40%.
When the shrinkage ratio of the fibers is less than 10%, the entanglement between the fibers or the pulp fibers is not sufficiently exhibited, and sufficient strength cannot be obtained. Moreover, what exceeds 50% is easily affected by the environment, and as a result, when mixed in pulp, it is liable to become lumpy, and sufficient strength cannot be obtained. That is, a strong part and a non-strong part are generated, and a weak part is destroyed.
[0008]
The shrinkage ratio of the fiber is measured by the following method.
That is, the test is performed in accordance with JIS L 1015-1992 chemical fiber staple test method. Specifically, referring to FIG. 1, a single fiber 3 is applied to a rectangular thin paper 1 (width about 5 mm, length about 50 mm, thickness 0.2 mm) having a window 2 having a width of about 10 mm and a length of 20 mm. In order to take up the slack, it is stretched with a very light tension, and both ends are fixed with the adhesive 4. Next, the thin paper 1 is cut in the width direction indicated by the dotted line 5 in the vicinity of the center in the length direction of the window 2 and then immersed in water for 5 minutes. Then, after draining with a filter paper, the fiber length (L 2 ) is measured by applying tension to the extent that sagging is taken, and the shrinkage is measured by the following mathematical formula (1).
[0009]
[Expression 1]
Figure 0003722583
[0010]
The fiber length of the fiber having a shrinkage of 10 to 50% in the water at 20 ° C. is 15 to 30 mm . If the fiber length is shorter than 10 mm, sufficient wet strength cannot be obtained. On the other hand, if the fiber length exceeds 100 mm, the fibers themselves are entangled and are not evenly mixed with the absorbent body, and similarly the strength cannot be obtained.
The fiber diameter of the fiber having a shrinkage of 10 to 50% in water at 20 ° C. is preferably 0.1 to 10 denier, more preferably 0.5 to 5 denier. If the fiber diameter is less than 0.1 denier, the strength of the fiber itself is weak, so that the effect of addition cannot be obtained sufficiently, and if the fiber diameter exceeds 10 denier, there is little entanglement between the fibers and the strength is obtained in the same way. Absent. Further, the fiber having a shrinkage of 10 to 50% in 20 ° C. water may be crimped to increase the entanglement between the fibers.
[0011]
Fibers shrinkage rate of 10-50% in water at 20 ° C., hydrophilic ones are used, inter alia, polyvinyl alcohol is used from the stability of the effect and quality-strength improvement. Polyvinyl alcohol may be modified with maleic acid or itaconic acid. The content of the hydrophilic fiber is preferably 1 to 50 wt% with respect to the upper Symbol pulp fibers, and more preferably 3 to 30 wt%.
[0012]
In order to make the shrinkage rate in water at 20 ° C. 10 to 50%, for example, polyvinyl alcohol fiber can be controlled by changing its molecular weight, saponification degree, crystallinity, etc. For example, Kuraray Vinylon, Cremona [all manufactured by Kuraray Co., Ltd.], Unitika Vinylon [manufactured by Unitika Ltd.], Sorbron, Nichibiron [all manufactured by Nichibi Co., Ltd.] and the like are commercially available. Has been.
[0013]
The pulp fiber is not particularly limited as long as it is conventionally used for an absorber, but the average fiber length of the pulp fiber is usually 0.8 to 3 mm in consideration of pulverization, lamination, compression treatment and the like. It is desirable to be in range. The water-absorbing polymer is not particularly limited as long as it is conventionally used in the absorber, but in the present invention, it is desirable to use a highly water-absorbing polymer, and the water-absorbing polymer has a liquid absorption rate of 20 w / It is desirable that it is greater than or equal to w. Specific water-absorbing polymers include polyacrylic acid soda, acrylic acid-vinyl alcohol copolymer, polyacrylic acid soda cross-linked product, starch-acrylic acid graft polymer, isobutylene-maleic anhydride copolymer or saponified product thereof. Powders such as potassium polyacrylate and cesium polyacrylate are preferred. It is desirable that the water-absorbing polymer is 100 to 500% by weight, particularly 120 to 300% by weight, based on the pulp fiber, and when used in this range, the absorbent absorbs body fluid sufficiently and retains the shape of the absorbent. Sex is sufficiently maintained.
[0014]
The surface sheet of the absorbent article of the present invention is not particularly limited as long as it has sufficient liquid permeability, and examples thereof include a woven fabric, a nonwoven fabric, and a porous sheet. , Polyester, polyethylene, polypropylene and the like. The back sheet is not particularly limited as long as it is a liquid-impermeable sheet conventionally used for absorbent articles, but is liquid-impermeable and stretched by adding a filler to a thermoplastic resin. A vapor-permeable sheet or the like to be transmitted is preferable, and a composite material of the sheet and a nonwoven fabric can be used.
[0015]
The absorbent article of the present invention can be produced by a method known per se. Also, referring to the following examples, those skilled in the art will be able to easily manufacture the absorbent article of the present invention.
[0016]
【Example】
EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to the examples.
[0017]
(1) Production of disposable diapers [Example 1]
On a tissue having a basis weight of 15 g / m 2 , 60 parts by weight of pulverized pulp fibers and polyvinyl alcohol (PVA) fibers having a shrinkage rate of 30% in water at 20 ° C. (degree of polymerization 2400, completely saponified product, 1.5 denier, 20 mm cut product) 5 parts by weight and 100 parts by weight of superabsorbent polymer were uniformly mixed, laminated at a basis weight of 250 g / m 2 , and wrapped with the tissue to obtain an absorbent. A nonwoven fabric having a basis weight of 25 g / m 2 made of polyethylene fiber as a surface material and a polyethylene sheet as a back sheet were arranged on the obtained absorbent body to obtain a disposable diaper.
[0018]
[Example 2]
The PVA fiber in Example 1 was heat-treated, and Example 1 was used except that 10 parts by weight (1.5 denier, 15 mm cut product) in which the shrinkage rate in water at 20 ° C. was changed to 15% was used. Similarly, a disposable diaper was obtained.
[0021]
[Example 3 ]
Example 1 except that another PVA fiber (degree of polymerization 1700, completely saponified product, shrinkage 25% in water at 20 ° C., fineness 1.5 denier, 20 mm cut product) was used as the PVA fiber in Example 1. In the same manner as in No. 1, a disposable diaper was obtained.
[0022]
[Comparative Example 1]
Instead of the PVA fiber used in Example 1, nylon fiber (1.5d, 15 mm cut product, shrinkage in water at 20 ° C. = 0%) was used in the same manner as in Example 1, A disposable diaper absorbent body was obtained.
[0023]
[Comparative Example 2]
In place of the PVA fiber used in Example 2, a polyethylene fiber (2d, 10 mm cut product, melting point 100 ° C., shrinkage rate in water at 20 ° C. ≈0%) was similarly prepared, and the surface of the absorbent was prepared. Except having heat-processed with the hot embossing roll of temperature 140 degreeC, it carried out similarly to Example 1, and obtained the absorber for disposable diapers.
[0024]
[Comparative Example 3]
Instead of the PVA fibers used in Example 1, partially saponified PVA fibers (polymerization degree 1700, saponification degree 88.9, 20 mm cut product, shrinkage ratio in water at 20 ° C. of 65%) were used. In the same manner as in Example 1, a disposable diaper absorbent body was obtained.
[0025]
(2) Evaluation of disposable diapers About each of the disposable diapers of Examples 1 to 3 and Comparative Examples 1 to 3 , a total of 200 usage tests were performed on 20 general monitors, and urine leakage for all diapers was observed. The percentage of diapers produced was determined. Moreover, the diaper after use was collect | recovered, the state of destruction of an absorber was observed, and the ratio of the diaper which the absorber destroyed with respect to all the diapers was calculated | required.
[0026]
[Table 1]
Figure 0003722583
[0027]
The following is clear from the results of the above Examples and Comparative Examples.
(I) Disposable diapers (Examples 1 to 3 ) composed of an absorbent body in which pulp fibers contain fibers exhibiting shrinkage with respect to water specified in the present invention (Examples 1 to 3 ) have little urine leakage and the absorbent body. There is little destruction.
(B) On the other hand, when the nylon fiber (comparative example 1) and the PVA fiber (comparative example 3) that do not exhibit the shrinkage specified in the present invention are contained, the ratio of urine leakage is large and the absorber The rate of destruction is also large.
(C) The disposable diaper (Comparative Example 2) composed of the absorbent body containing the PE fiber that does not exhibit the shrinkage specified in the present invention and subjected to the heat-sealing treatment has little damage to the absorbent body. There is a large percentage of urine leakage.
[0028]
【The invention's effect】
The absorbent body of the present invention stably maintains the shape of the absorbent body when absorbing body fluid, has no inhibition of absorption, and is excellent in texture.
[Brief description of the drawings]
FIG. 1 is a schematic diagram for explaining an operation for measuring the shrinkage ratio of fibers in water at 20 ° C. FIG.
[Explanation of symbols]
1 Thin paper 2 Window 3 Fiber 4 Adhesive 5 Cutting line

Claims (4)

液透過性の表面シートと液不透過性の裏面シートと、これら両シート間に介在する液保持性の吸収体とを有し、該吸収体が主にパルプ繊維と吸水性ポリマーを主体としている吸収性物品において、
20℃の水中で10〜50%の収縮率を示す親水性繊維が、上記吸収体の上記パルプ繊維内に分散しており、該親水性繊維が、繊維長15〜30mmのポリビニルアルコール繊維であることを特徴とする吸収性物品。
It has a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retaining absorbent that is interposed between the two sheets, and the absorbent mainly comprises pulp fibers and a water-absorbing polymer. In absorbent articles,
Hydrophilic fibers exhibiting a shrinkage of 10 to 50% in water at 20 ° C. are dispersed in the pulp fibers of the absorber, and the hydrophilic fibers are polyvinyl alcohol fibers having a fiber length of 15 to 30 mm. An absorbent article characterized by the above.
上記親水性繊維の含有量が、パルプ繊維に対して1〜50重量%である請求項1記載の吸収性物品。The absorbent article according to claim 1, wherein the content of the hydrophilic fiber is 1 to 50% by weight with respect to the pulp fiber. 上記親水性繊維の繊度が、0.1〜10デニールである請求項1又は2に記載の吸収性物品。The absorbent article according to claim 1 or 2, wherein the hydrophilic fiber has a fineness of 0.1 to 10 denier. 上記吸収体の吸水性ポリマーの含有量が、パルプ繊維に対して100〜300重量%である請求項1〜3のいずれかに記載の吸収性物品。The absorbent article according to any one of claims 1 to 3, wherein a content of the water-absorbing polymer in the absorbent body is 100 to 300% by weight with respect to pulp fibers.
JP09070797A 1997-04-09 1997-04-09 Absorbent articles Expired - Fee Related JP3722583B2 (en)

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