JP3995388B2 - Absorbent articles - Google Patents

Description

【００１４】
前記高吸収性ポリマーとしては、前記の特性を満足するものであれば特に制限されないが、具体的には例えば、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）共重合体及びそのケン化物、ポリアクリル酸カリウム、並びにポリアクリル酸セシウム等が挙げられる。尚、前記の特性を満たすようにするためには、例えば、高吸収性ポリマーの粒子表面に架橋密度勾配を設けたり、高吸収性ポリマーの粒子を非球形状の不定形粒子とすればよく、具体的には特開平７−１８４９５６号公報の第７欄２８行〜第９欄第６行に記載の方法を用いることができる。
【００１５】
更に、本発明において用いられる高吸収性ポリマーは、以下の方法で測定される液通過時間が、２０秒以下、特に２〜１５秒であることが、ゲルブロッキングの発生及びそれに起因する吸収性能の低下を防止し、また、吸収が間に合わないことに起因する液の素抜け及び漏れの発生を防止する点から好ましい。液通過時間は以下の方法で測定される。
【００１６】
＜液通過時間の測定方法＞
断面積４．９１ｃｍ² （内径２５ｍｍφ）で底部に開閉自在のコック（内径４ｍｍφ）が設けられた円筒内に、該コックを閉鎖した状態で、高吸収性ポリマー０．５ｇを生理食塩水と共に充填し、該生理食塩水により該高吸収性ポリマーを飽和状態に達するまで膨潤させる。膨潤した該高吸収性ポリマーが沈降した後、該コックを開き、生理食塩水５０ｍｌを通過させる。該生理食塩水５０ｍｌが通過するのに要した時間を測定し、この時間を液通過時間とする。
【００１７】
本実施形態のおむつ１においては、表面材２に、着用者の皮膚に対して所定の効能を有する薬剤及び該薬剤の着用者への皮膚への浸透を促進させるエーテル系浸透促進剤が施されている。これによって、前記薬剤の移行量がたとえ少量であっても、該薬剤が皮膚へ十分に促進するので、該薬剤の効能が十分に発揮されて、着用者の皮膚のかぶれや炎症が効果的に抑制・治癒される。
【００１８】
前記薬剤としては、着用者の皮膚に対して所定の効能を有する物質であれば特に制限無く用いることができる。例えばスクワラン、スクワレン、１，３−ブチレングリコール、プロピレングリコール、グリセリン等の保湿剤、着用者の皮膚に対してスキンケア効果を有する植物エキス、グアイアズレン、タンニン、没食子酸誘導体等の消炎剤、その他化粧品用油剤として用いられている、イソプロピルミリスチル、イソプロピルプロパノール、ワセリン、セタノール、ステアリルアルコール、2-エチルヘキサン酸トリグリセリド等が挙げられる。本明細書において、「スキンケア効果」とは、皮膚のかぶれ防止や消炎等の皮膚の状態を正常にする効能全般を意味する。また、前述した特表平１０−５０９８９５号公報及び特表平１０−５０９８９５号公報に記載のエモリエント剤を前記薬剤として用いることもできる。
【００１９】
特に前記薬剤として植物エキスを用いる場合には、着用者の皮膚に対してスキンケア効果を有すると共に吸収体４に含まれている高吸収性ポリマーに対して実質的に分解作用を有さないものを用いることが好ましい。「高吸収性ポリマーに対して実質的に分解作用を有さない」とは、高吸収性ポリマーに対して全く分解作用を有さない場合、及び高吸収性ポリマーの有する吸水性能を実質的に低下させない程度の低い分解作用を有する場合の双方を包含する。斯かる植物エキスを施すことで、着用者から排出された体液、例えば尿や汗によって起こり得る皮膚のかぶれや炎症が抑制され、またかぶれや炎症が起こった場合にそれらが治癒される。更に、吸収体４に含まれている高吸収性ポリマーの分解及びそれに起因する吸収性能の低下が防止される。高吸収性ポリマーの分解防止は、本実施形態に用いられている吸収体４のように、高吸収性ポリマーの吸収容量が高い場合に特に効果的である。
【００２０】
前記植物エキスとしては、オーツ麦エキス、海藻エキス（ヒバマタ）、柚エキス、ハマメリスエキス、ワレモコウエキス、アスナロエキス、アロエエキス、オウバクエキス、スギナエキス、カミツレエキス、ユーカリエキス、桃エキス等が挙げられる。特に、植物エキスとして、柚エキス、ハマメリスエキス、アスナロエキス、アロエエキス、オウバクエキス及び桃エキスから成る群から選択される一種以上の物質を用いることで、スキンケア効果が一層高くなり、また高吸収性ポリマーの分解が一層抑制される。これらのうちでも、スキンケア効果の更に一層の向上及び高吸収性ポリマーの更に一層の分解抑制の点から、ハマメリスエキス又はアスナロエキスを用いることが好ましい。吸収性物品の製造工程で加熱処理を行う場合に防爆対応を要しない点から、前記植物エキスは、１，３−ブチレングリコール抽出物であることが好ましい。また、１，３−ブチレングリコール抽出物を用いることで、１，３−ブチレングリコールがおむつ１中に共存することになり、吸収性能の劣化が少なくなる。
【００２１】
前記薬剤と共に施される前記浸透促進剤としては脂肪族エーテル系浸透促進剤が用いられる。脂肪族エーテル系浸透促進剤は熱的に安定な物質なので、吸収性物品の製造工程において、所定のシートに加熱溶融状態で塗工される際に変性・分解しずらい。従って、該脂肪族エーテル系浸透促進剤は熱による作用低下が起こりにくく、該脂肪族エーテル系浸透促進剤の作用によって前記薬剤が着用者の皮膚に十分に浸透する。
【００２２】
前記脂肪族エーテル系浸透促進剤を施さずに、前記薬剤を多量に施すか、又は該薬剤の粘度を低下させることによって、該薬剤を着用者の皮膚に移行させることは可能であるが、その場合には経費が高くなり、またべたつき感等が生じておむつ１の感触が低下してしまう。そこで本発明においては、前記薬剤と共に前記浸透促進剤を施すことで、薬剤の移行量がたとえ少量であっても該薬剤が十分に皮膚に浸透して所望の効能が発揮される。
【００２３】
前記脂肪族エーテル系浸透促進剤としては、その溶解度パラメータ値（以下、ＳＰ値という）が１５〜１７、特に１６〜１６．８の物質を用いることが好ましい。ＳＰ値が前記範囲内であることによって、べたつきが低くさらっとした感触のおむつとなる。
【００２４】
好ましく用いられる前記脂肪族エーテル系浸透促進剤としては、以下の一般式（１）で表されるものが挙げられる。特に一般式（２）又は（３）で表されるものが好ましい。
【００２５】
【化１】

【００２６】
前記一般式（１）で表される脂肪族エーテル系浸透促進剤の具体例としては、ミリスチル−１，３−ジメチルブチルエーテル、パルミチル−１，３−ジメチルブチルエーテル、ステアリル−１，３−ジメチルブチルエーテル、パルミチル−３−メチルプロピルエーテル、ステアリル−３−メチルプロピルエーテル等が挙げられる。
【００２７】
前記薬剤及び前記浸透促進剤は、表面材２における少なくとも液の主吸収領域に施されている。「液の主吸収領域」とは、股下部からその前後方向へ延びる領域であり、表面材２における周縁部を除く意味である。勿論、表面材２の全面に亘って前記薬剤及び前記浸透促進剤が施されていてもよい。更には、立体ガード形成用の不織布、レッグ部、ウエスト部等の、おむつ内面における身体に接触し得る部分であれば、いずれの部分に施しても良い。
【００２８】
種類によって異なるが、前記薬剤は、表面材２の前記主吸収領域において、１ｇ／ｍ² 〜２０ｇ／ｍ² 、好ましくは３ｇ／ｍ² 〜１０ｇ／ｍ² の量で塗工されていることが、経済的に見合う範囲で十分な効果が発現し、また触感や吸収性能の点から好ましい。
【００２９】
一方、前記浸透促進剤は、前記薬剤１重量部に対して３〜３０重量部、特に５〜１５重量部施されていることが、経済的に見合う範囲で十分な効果が発現し、更に安全性を確保する点から好ましい。
【００３０】
前記薬剤及び前記浸透促進剤は、これらを均一に混合し、得られた混合物を表面材２に塗布する等の手段によって施すことができる。
【００３１】
前記薬剤及び前記浸透促進剤が施されている部位、本実施形態においては表面材２に、該薬剤及び該浸透促進剤と共に該浸透促進剤のゲル化剤が施されていることが好ましい。前記浸透促進剤は、場合によっては吸収体４に含まれている高吸収性ポリマーの吸収性能を低下させるおそれがある。しかし、前記ゲル化剤によって前記浸透促進剤をゲル化させることで、該浸透促進剤が高吸収性ポリマーへ過度に拡散することが防止され、高吸収性ポリマーの吸収性能の低下が効果的に防止される。
【００３２】
前記ゲル化剤としては、前記浸透促進剤の拡散・移行を抑制し得る物質が用いられ、例えばパラフィンワックス、脂肪酸（Ｃ₁₂〜Ｃ₂₂）、脂肪族アルコール（Ｃ₁₂〜Ｃ₂₂）、ワセリン、脂肪酸ソルビタンエステル（モノ、ジ、トリ）、ポリオキシエチレン脂肪酸ソルビタンエステル等が挙げられる。
【００３３】
前記ゲル化剤は、前記浸透促進剤１００重量部に対して１０〜２００重量部、特に５０〜１００重量部施されていることが、経済性、触感、加工性の点から好ましい。
【００３４】
本実施形態のおむつ１においては、前記薬剤及び前記浸透促進剤が施されている部位に、前述したゲル化剤に加えて別の成分を施してもよい。そのような成分としては、例えば前記薬剤及び前記浸透促進剤を施す際に用いられる、これらの剤を含む混合物の粘度を調整するための粘度調整剤としての流動パラフィン、シリコーンオイル、動植物油（スクワラン、オリーブ油、ホホバ油、ベニバナ油）、モノ、ジ又はトリグリセライド等が挙げられる。前記薬剤、前記浸透促進剤、前記ゲル化剤、及び前記粘度調整剤の混合物の常温（２０℃）におけるＪＩＳ硬度は２０〜５０であることが皮膚への薬剤移行性と触感とを両立できる点から好ましい。
【００３５】
本実施形態のおむつ１においては、前記薬剤及び前記浸透促進剤が施されている部位に、肌を滑らかにあるいは乾燥させる目的で、シッカロール、タルク、酸化チタン、シリコーンビーズ、ナイロンビーズ等の有機又は無機の微粒子を含有させても良い。該微粒子の粒径は０．０５〜５０μｍ、特に１〜２０μｍであることが前記目的が十分に達成される点から好ましい。
【００３６】
本発明は、前記実施形態に制限されない。例えば、吸収体４に、従来のおむつに一般的に用いられているパルプを含有させてもよい。この場合、パルプ１００重量部に対し、高吸収性ポリマーの量は５〜３００重量部であることが好ましい。
【００３７】
また、本発明の吸収性物品は、前述した使い捨ておむつに限られず、生理用ナプキン、失禁パッド、パンティライナー、おりものシート等の他の吸収性物品にも同様に適用できる。
【００３８】
【実施例】
以下の例中、特に断らない限り「％」及び「部」は、それぞれ「重量％」及び「重量部」を意味する。
【００３９】
〔実施例１〜５〕
表１に示す各種植物エキス１部、ポリオキシエチレンアルキルエーテル（界面活性剤）２部、表１に示す浸透促進剤、パラフィンワックス（ゲル化剤）５０部及び粘度調整剤としての流動パラフィン４７部を均一に混合し、混合物を得た（混合物の２０℃におけるＪＩＳ硬度３５）。芯がポリプロピレンで鞘がポリエチレンからなる芯鞘型複合繊維（２．２ｄｔｅｘ、５１ｍｍ）からなるエアスルー不織布の全面に前記混合物を塗布した。これにより植物エキス及びミリスチル−１，３−ジメチルエーテルが施された表面材を得た。前記混合物の塗布量は１０ｇ／ｍ² であった。
【００４０】
これとは別に、芯がポリプロピレンで鞘がポリエチレンからなる芯鞘型複合繊維（２．２ｄｔｅｘ、５１ｍｍ）と、ポリエチレンテレフタレート繊維（２．２ｄｔｅｘ、５１ｍｍ）とを重量比７０／３０の比率で混綿し、坪量３０ｇ／ｍ² のエアスルー不織布を作製した。この不織布上に、高吸水性ポリマーの粒子を２００ｇ／ｍ² の坪量となるように散布し、該不織布の繊維間に高吸水性ポリマーの粒子を保持させた。次いで、この不織布上下面を坪量１５ｇ／ｍ² の薄葉紙で包んで吸収体を得た。高吸収性ポリマーについての前記吸水量は表１に示す通りである。
【００４１】
この吸収体の片面に前記表面材を配し、他の面に裏面材としてポリエチレン製フィルムを配した。更に、公知の止着具、弾性伸縮部材等を配して、図１に示す形態の使い捨ておむつを得た。
【００４２】
〔実施例６〕
実施例１における植物エキスに代えて、表１に示す薬剤を用いる以外は実施例１と同様にして使い捨ておむつを得た。該薬剤の付着量は１０ｇ／ｍ² であった。
【００４３】
〔比較例１〕
表１に示す植物エキス１部、ポリオキシエチレンアルキルエーテル２部、鉱物油５０部、パラフィンワックス４７部を均一に混合し、混合物を得た。芯がポリプロピレンで鞘がポリエチレンからなる芯鞘型複合繊維（２．２ｄｔｅｘ、５１ｍｍ）からなるエアスルー不織布の表面に、７０℃に加熱された前記混合物を塗布した。これにより植物エキスが施された表面材を得た。植物エキスの付着量は実施例１と同様とした。これ以外は実施例１と同様にして使い捨ておむつを得た。
【００４４】
〔比較例２〕
浸透促進剤として、ミリスチルイソプロパノールを用いる以外は実施例１と同様にして使い捨ておむつを得た。
【００４５】
〔性能評価〕
実施例及び比較例で得られた使い捨ておむつを１０名のモニターに装着して貰い、おむつかぶれの程度及び使用後の高吸収性ポリマーの溶解の程度を評価した。また、前記表面材に前記薬剤及び前記浸透促進剤を塗布した際の加工性を評価した。その結果を表１に示す。
【００４６】
【表１】

【００４７】
表１に示す結果から明らかなように、実施例の使い捨ておむつ（本発明品）は、比較例のおむつに比して、おむつかぶれが抑制されていることが判る。また、高吸収性ポリマーの分解に起因する溶解も抑制されていることが判る。更に、前記薬剤及び前記浸透促進剤の前記表面材への塗布も良好であることが判る。尚、表には示していないが、実施例の使い捨ておむつはべたつき感が無くさらっとした感触を呈していた。
【００４８】
【発明の効果】
本発明の吸収性物品によれば、薬剤の移行量がたとえ少量であっても、着用者の皮膚のかぶれや炎症が抑制・治癒される。
【図面の簡単な説明】
【図１】本発明の吸収性物品の一実施形態としての使い捨ておむつを表面材側から見た一部破断平面図である。
【符号の説明】
１ 使い捨ておむつ（吸収性物品）
２ 表面材
３ 裏面材
４ 吸収体[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an absorptive article in which rash and inflammation on a wearer's skin are suppressed / healed even when the amount of drug transferred is small.
[0002]
[Prior art and problems to be solved by the invention]
As an absorbent article for the purpose of preventing a wearer's skin irritation, for example, those described in Japanese Patent Application Laid-Open No. 10-509895 and Japanese Patent Application No. 10-509896 are known. These publications describe disposable diapers in which a lotion containing an emollient is applied to the top sheet. This lotion agent contains an immobilizing agent that immobilizes the emollient on the top sheet.
[0003]
However, in the disposable diaper described in the publication, since the emollient is immobilized on the top sheet, the emollient is not easily transferred to the wearer's skin. Therefore, the emollient applied to the top sheet is not efficient because the total amount cannot effectively contribute to the anti-inflammatory action of the skin. Furthermore, the properties of the immobilizing agent for immobilizing the emollient agent harden the lotion agent, tending to cause small scratches on the skin, and this causes fogging.
[0004]
Apart from this, aliphatic ester substances are known as the emollients. However, since this substance is not said to have high thermal stability, it decomposes in the melting and coating process of the emollient agent in the manufacturing process of absorbent articles, particularly in the process of repeatedly heating the emollient agent in the tank and heating it for a long time. As a result, lower fatty acids with strong irritation and bad odor are generated.
[0005]
Accordingly, an object of the present invention is to provide an absorbent article that can suppress / heal rash and inflammation of the wearer's skin even when the amount of drug transferred is small.
[0006]
[Means for Solving the Problems]
The present invention relates to an absorbent article having a liquid-retaining absorbent layer and a liquid-impermeable leak-proof layer, and a drug having a predetermined effect on a wearer's skin at a predetermined site of the absorbent article, The object is achieved by providing an absorbent article provided with an aliphatic ether penetration enhancer that promotes penetration of the drug into the skin of the wearer.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the absorbent article of the present invention will be described with reference to the drawings, taking a disposable diaper as an example of the absorbent article.
[0008]
As shown in FIG. 1, the disposable diaper 1 of the present embodiment includes a surface material 2 as a liquid-permeable surface layer made of a nonwoven fabric or a perforated film, and a back material 3 as a liquid-impermeable leak-proof layer. And an absorbent body 4 as a liquid retaining absorbent layer interposed between the front surface material 2 and the back surface material 3. The absorbent body 4 is curved and formed in an hourglass shape in which the region corresponding to the crotch region of the diaper 1 is constricted, and the front material 2 and the back material 3 also correspond to the crotch region of the diaper 1 in accordance with the shape of the absorbent body 4. The region is curved. The absorber 4 is sandwiched and fixed by the front surface material 2 and the back surface material 3.
[0009]
A back side and abdomen side waist portions 5 and 5 ′ and a pair of leg portions 6 and 6 formed by the front surface material 2 and the back surface material 3 extending outward from front and rear and left and right end edges of the absorber 4. When the diaper 1 is worn, the elastic elastic member 7 for fitting the waist portions 5 and 5 ′ and the leg portions 6 and 6 to the wearer's body is fixed by the surface material 2 and the back surface material 3. Is provided. A pair of fasteners 8 each composed of a tape fastener or the like are attached to both ends in the width direction of the back side waist portion 5, and a rectangular landing on the back material 3 in the waist portion 5 ′ on the abdomen side An attachment (not shown) made of tape or the like is attached. And when the disposable diaper 1 of this embodiment is worn, the fastening tools 8 and 8 are made to fasten on a to-be-attached tool. As these members constituting the diaper 1, the same members as those used in conventional disposable diapers are used.
[0010]
The absorbent body 4 has superabsorbent polymer particles and a nonwoven fabric. The superabsorbent polymer particles are held in the interfiber spacing of the nonwoven fabric. The entire surface of the nonwoven fabric holding the superabsorbent polymer particles is covered with the thin paper 11. Thus, the absorber 4 is configured. The absorbent body 4 having such a configuration is extremely thin as compared with a conventional absorbent body mainly composed of pulp and superabsorbent polymer particles. The fibers constituting the nonwoven fabric include rayon fibers, hydrophilic fibers such as cotton and cellulose acetate, polyolefin fibers such as polyethylene and polypropylene, condensed fibers such as polyester and polyamide, and vinyl monomer polymers such as vinyl chloride and vinyl acetate. And the like. Of these fibers, hydrophobic fibers may be used after being hydrophilized by treatment with an oil agent or the like.
[0011]
The superabsorbent polymer used in the present invention has a physiological saline water absorption amount of preferably 30 g / g or more, more preferably 30 to 45 g / g, still more preferably 35 to 45 g / g. . If a superabsorbent polymer having a water absorption of less than 30 g / g is used, it is necessary to increase the amount of the polymer in the absorbent body 4 in order to improve the absorption capacity, which is not economical and becomes a thick diaper. It may lack portability. The water absorption is measured by the following method.
[0012]
<Measurement method of water absorption by centrifugal dehydration of superabsorbent polymer>
After 1 g of superabsorbent polymer is swollen with 150 ml of physiological saline for 30 minutes, it is placed in a 250 mesh nylon mesh bag, dehydrated with a centrifuge at 143 G for 10 minutes, and the total weight after dehydration is measured. Next, the amount of water absorption (g / g) by centrifugal dehydration is calculated according to the following formula (1).
[0013]
[Expression 1]

[0014]
The superabsorbent polymer is not particularly limited as long as it satisfies the above-mentioned characteristics. Specifically, for example, polyacrylic acid soda, (acrylic acid-vinyl alcohol) copolymer, polyacrylic acid soda crosslinking Body, (starch-acrylic acid) graft polymer, (isobutylene-maleic anhydride) copolymer and saponified product thereof, potassium polyacrylate, and cesium polyacrylate. In order to satisfy the above characteristics, for example, a crosslink density gradient may be provided on the surface of the superabsorbent polymer particles, or the superabsorbent polymer particles may be non-spherical amorphous particles. Specifically, the method described in JP-A-7-18495, column 7 line 28 to column 9 line 6 can be used.
[0015]
Furthermore, the superabsorbent polymer used in the present invention has a liquid passage time measured by the following method of 20 seconds or less, particularly 2 to 15 seconds. This is preferable from the viewpoint of preventing a drop and preventing occurrence of leakage and leakage due to inadequate absorption. The liquid transit time is measured by the following method.
[0016]
<Measurement method of liquid transit time>
A cylinder with a cross-sectional area of 4.91 cm ² (inner diameter: 25 mmφ) and a cock that can be opened and closed at the bottom (inner diameter: 4 mmφ) is filled with 0.5 g of superabsorbent polymer together with physiological saline with the cock closed. And swell the superabsorbent polymer with the saline until it reaches saturation. After the swollen superabsorbent polymer settles, the cock is opened and 50 ml of physiological saline is passed through. The time required for 50 ml of the physiological saline to pass through is measured, and this time is taken as the liquid passage time.
[0017]
In the diaper 1 of the present embodiment, the surface material 2 is provided with a drug having a predetermined effect on the skin of the wearer and an ether penetration enhancer that promotes penetration of the drug into the wearer's skin. ing. As a result, even if the transfer amount of the drug is small, the drug is sufficiently promoted to the skin, so that the effect of the drug is sufficiently exerted and the skin irritation and inflammation of the wearer are effectively prevented. Suppressed and cured.
[0018]
The drug can be used without particular limitation as long as it has a predetermined effect on the wearer's skin. For example, moisturizers such as squalane, squalene, 1,3-butylene glycol, propylene glycol, glycerin, plant extracts having skin care effects on the skin of the wearer, anti-inflammatory agents such as guaiazulene, tannin, gallic acid derivatives, and other cosmetics Examples of the oil used include isopropyl myristyl, isopropyl propanol, petrolatum, cetanol, stearyl alcohol, and 2-ethylhexanoic acid triglyceride. In the present specification, the “skin care effect” means an overall effect of normalizing skin conditions such as skin irritation prevention and anti-inflammation. Moreover, the emollients described in JP-A-10-509895 and JP-A-10-509895 described above can also be used as the drug.
[0019]
In particular, when a plant extract is used as the drug, it has a skin care effect on the skin of the wearer and has substantially no decomposing action on the superabsorbent polymer contained in the absorbent body 4. It is preferable to use it. “Substantially has no decomposing action on the superabsorbent polymer” means that the water absorbing performance of the superabsorbent polymer is substantially the same as when the superabsorbent polymer has no decomposing action. It includes both cases where the decomposition action is low enough not to decrease. By applying such a plant extract, skin irritation and inflammation that can be caused by body fluids discharged from the wearer, such as urine and sweat, are suppressed, and when irritation and irritation occur, they are cured. Furthermore, the decomposition of the superabsorbent polymer contained in the absorbent body 4 and the deterioration of the absorption performance resulting therefrom are prevented. Prevention of decomposition of the superabsorbent polymer is particularly effective when the absorbent capacity of the superabsorbent polymer is high, such as the absorber 4 used in the present embodiment.
[0020]
Examples of the plant extract include oat extract, seaweed extract (Hibamata), rice bran extract, hamamelis extract, bituminous extract, asunalo extract, aloe extract, buckwheat extract, horsetail extract, chamomile extract, eucalyptus extract, peach extract and the like. In particular, as a plant extract, by using one or more substances selected from the group consisting of camellia extract, hamamelis extract, asunalo extract, aloe extract, agaric extract and peach extract, the skin care effect is further enhanced, and the high absorbency Polymer degradation is further suppressed. Among these, from the viewpoint of further improving the skin care effect and further suppressing the decomposition of the superabsorbent polymer, it is preferable to use the Hamelis extract or Asunaro extract. The plant extract is preferably a 1,3-butylene glycol extract from the viewpoint that no explosion-proof treatment is required when heat treatment is performed in the manufacturing process of the absorbent article. Moreover, by using a 1, 3- butylene glycol extract, 1, 3- butylene glycol will coexist in the diaper 1, and deterioration of absorption performance will decrease.
[0021]
As the penetration enhancer applied together with the drug, an aliphatic ether penetration enhancer is used. Since the aliphatic ether penetration enhancer is a thermally stable substance, it is difficult to modify and decompose when applied to a predetermined sheet in a heated and melted state in the manufacturing process of the absorbent article. Therefore, the action of the aliphatic ether penetration enhancer is unlikely to decrease due to heat, and the action of the aliphatic ether penetration enhancer sufficiently penetrates the skin of the wearer.
[0022]
It is possible to transfer the drug to the wearer's skin by applying a large amount of the drug or reducing the viscosity of the drug without applying the aliphatic ether penetration enhancer, In some cases, the cost is increased, and a sticky feeling or the like is generated, and the feel of the diaper 1 is lowered. Therefore, in the present invention, by applying the penetration enhancer together with the drug, the drug sufficiently penetrates the skin and exhibits the desired effect even if the amount of drug transferred is small.
[0023]
As the aliphatic ether penetration enhancer, a substance having a solubility parameter value (hereinafter referred to as SP value) of 15 to 17, particularly 16 to 16.8 is preferably used. When the SP value is within the above range, the diaper has a low-stickiness and a dry feel.
[0024]
Examples of the aliphatic ether penetration enhancer preferably used include those represented by the following general formula (1). Particularly preferred are those represented by the general formula (2) or (3).
[0025]
[Chemical 1]

[0026]
Specific examples of the aliphatic ether penetration enhancer represented by the general formula (1) include myristyl-1,3-dimethylbutyl ether, palmityl-1,3-dimethylbutyl ether, stearyl-1,3-dimethylbutyl ether, Examples include palmityl-3-methylpropyl ether and stearyl-3-methylpropyl ether.
[0027]
The drug and the penetration enhancer are applied to at least a main absorption region of the liquid in the surface material 2. The “liquid main absorption region” is a region extending from the crotch part in the front-rear direction and excluding the peripheral part of the surface material 2. Of course, the said chemical | medical agent and the said penetration enhancer may be given over the whole surface material 2. FIG. Furthermore, as long as it is a part which can contact the body in the inner surface of a diaper, such as a nonwoven fabric for forming a three-dimensional guard, a leg part, and a waist part, it may be applied to any part.
[0028]
Varies depending on the type, the agent is in the main absorbent region of the surface material ^{2, 1g / m 2 ~20g /} m 2, that preferably is coated in an amount of 3g / m ² ~10g / m ² A sufficient effect is exhibited within an economically suitable range, and it is preferable from the viewpoint of touch and absorption performance.
[0029]
On the other hand, the penetration enhancer is applied in an amount of 3 to 30 parts by weight, particularly 5 to 15 parts by weight, with respect to 1 part by weight of the drug. It is preferable from the viewpoint of securing the property.
[0030]
The said chemical | medical agent and the said penetration enhancer can mix these uniformly, and can apply | coat them by means, such as apply | coating the obtained mixture to the surface material 2. FIG.
[0031]
It is preferable that the site | part to which the said chemical | medical agent and the said penetration enhancer are given, the surface material 2 in this embodiment is given the gelatinizer of this penetration promoter with this chemical | medical agent and this penetration promoter. In some cases, the penetration enhancer may reduce the absorption performance of the superabsorbent polymer contained in the absorbent body 4. However, gelation of the penetration enhancer with the gelling agent prevents the penetration enhancer from excessively diffusing into the superabsorbent polymer, effectively reducing the absorption performance of the superabsorbent polymer. Is prevented.
[0032]
As the gelling agent, a substance capable of suppressing the diffusion / migration of the penetration enhancer is used. For example, paraffin wax, fatty acid (C ₁₂ -C ₂₂ ), aliphatic alcohol (C ₁₂ -C ₂₂ ), petroleum jelly, Examples include fatty acid sorbitan esters (mono, di, tri), polyoxyethylene fatty acid sorbitan esters, and the like.
[0033]
The gelling agent is preferably applied in an amount of 10 to 200 parts by weight, particularly 50 to 100 parts by weight, based on 100 parts by weight of the penetration accelerator, from the viewpoints of economy, touch and workability.
[0034]
In the diaper 1 of this embodiment, you may give another component to the site | part to which the said chemical | medical agent and the said penetration enhancer are given in addition to the gelatinizer mentioned above. Such components include, for example, liquid paraffin, silicone oil, animal and vegetable oils (squalane) as viscosity modifiers for adjusting the viscosity of a mixture containing these agents, which is used when applying the drug and the penetration enhancer. , Olive oil, jojoba oil, safflower oil), mono-, di- or triglycerides. The point that JIS hardness at room temperature (20 ° C.) of the mixture of the drug, the penetration enhancer, the gelling agent, and the viscosity modifier is 20 to 50 can achieve both drug migration to skin and tactile sensation. To preferred.
[0035]
In the diaper 1 of the present embodiment, for the purpose of smoothing or drying the skin on the site where the drug and the penetration enhancer are applied, organic or organic substances such as siccalol, talc, titanium oxide, silicone beads, and nylon beads are used. Inorganic fine particles may be contained. The particle diameter of the fine particles is preferably 0.05 to 50 μm, and particularly preferably 1 to 20 μm, from the viewpoint that the object is sufficiently achieved.
[0036]
The present invention is not limited to the embodiment. For example, you may make the absorber 4 contain the pulp generally used for the conventional diaper. In this case, the amount of the superabsorbent polymer is preferably 5 to 300 parts by weight with respect to 100 parts by weight of the pulp.
[0037]
Further, the absorbent article of the present invention is not limited to the disposable diaper described above, and can be similarly applied to other absorbent articles such as sanitary napkins, incontinence pads, panty liners, and cage sheets.
[0038]
【Example】
In the following examples, “%” and “parts” mean “% by weight” and “parts by weight”, respectively, unless otherwise specified.
[0039]
[Examples 1 to 5]
1 part of various plant extracts shown in Table 1, 2 parts of polyoxyethylene alkyl ether (surfactant), 50 parts of penetration enhancer, 50 parts of paraffin wax (gelling agent) shown in Table 1, and 47 parts of liquid paraffin as a viscosity modifier Were mixed uniformly to obtain a mixture (JIS hardness 35 at 20 ° C. of the mixture). The said mixture was apply | coated to the whole surface of the air through nonwoven fabric which consists of a core-sheath-type composite fiber (2.2 dtex, 51 mm) whose core is a polypropylene and whose sheath is polyethylene. Thereby, the surface material to which the plant extract and myristyl-1,3-dimethyl ether were applied was obtained. The coating amount of the mixture was 10 g / m ² .
[0040]
Separately, a core-sheath composite fiber (2.2 dtex, 51 mm) having a core of polypropylene and a sheath of polyethylene and polyethylene terephthalate fiber (2.2 dtex, 51 mm) are mixed in a weight ratio of 70/30. An air-through nonwoven fabric having a basis weight of 30 g / m ² was produced. Superabsorbent polymer particles were dispersed on the nonwoven fabric so as to have a basis weight of 200 g / m ² , and the superabsorbent polymer particles were held between the fibers of the nonwoven fabric. Next, the upper and lower surfaces of the nonwoven fabric were wrapped with thin paper having a basis weight of 15 g / m ² to obtain an absorbent body. The water absorption for the superabsorbent polymer is as shown in Table 1.
[0041]
The said surface material was distribute | arranged to the single side | surface of this absorber, and the polyethylene film was distribute | arranged to the other surface as a back surface material. Furthermore, a known fastener, an elastic elastic member, etc. were arranged to obtain a disposable diaper having the form shown in FIG.
[0042]
Example 6
A disposable diaper was obtained in the same manner as in Example 1 except that the chemicals shown in Table 1 were used instead of the plant extract in Example 1. The adhesion amount of the drug was 10 g / m ² .
[0043]
[Comparative Example 1]
1 part of plant extract shown in Table 1, 2 parts of polyoxyethylene alkyl ether, 50 parts of mineral oil and 47 parts of paraffin wax were uniformly mixed to obtain a mixture. The said mixture heated at 70 degreeC was apply | coated to the surface of the air through nonwoven fabric which consists of a core sheath type composite fiber (2.2 dtex, 51 mm) whose core is a polypropylene and whose sheath is polyethylene. This obtained the surface material to which the plant extract was given. The amount of plant extract attached was the same as in Example 1. Except this, it carried out similarly to Example 1, and obtained the disposable diaper.
[0044]
[Comparative Example 2]
A disposable diaper was obtained in the same manner as in Example 1 except that myristyl isopropanol was used as the penetration enhancer.
[0045]
[Performance evaluation]
The disposable diapers obtained in Examples and Comparative Examples were worn on 10 monitors, and the degree of diaper rash and the degree of dissolution of the superabsorbent polymer after use were evaluated. Moreover, the workability at the time of apply | coating the said chemical | medical agent and the said penetration enhancer to the said surface material was evaluated. The results are shown in Table 1.
[0046]
[Table 1]

[0047]
As is apparent from the results shown in Table 1, it can be seen that the disposable diaper of the example (the product of the present invention) is suppressed from diaper rash compared to the diaper of the comparative example. Moreover, it turns out that the dissolution resulting from decomposition | disassembly of a superabsorbent polymer is also suppressed. Furthermore, it turns out that the application | coating to the said surface material of the said chemical | medical agent and the said penetration enhancer is also favorable. Although not shown in the table, the disposable diapers of the examples were not sticky and had a dry feel.
[0048]
【The invention's effect】
According to the absorbent article of the present invention, the skin irritation and inflammation of the wearer are suppressed / healed even if the amount of drug transferred is small.
[Brief description of the drawings]
FIG. 1 is a partially broken plan view of a disposable diaper as an embodiment of an absorbent article of the present invention as viewed from a surface material side.
[Explanation of symbols]
1 disposable diaper (absorbent article)
2 Surface material 3 Back material 4 Absorber

Claims (5)

In an absorbent article having a liquid-retaining absorbent layer and a liquid-impermeable leak-proof layer, a medicine having a prescribed effect on the skin of the wearer at a predetermined site of the absorbent article and the wearer of the medicine An aliphatic ether penetration enhancer that promotes skin penetration into the skin has been applied ,
The aliphatic ether penetration enhancer is an absorbent article represented by the following general formula (1) .

  The absorbent article according to claim 1, further comprising a liquid-permeable surface layer that sandwiches the absorption layer together with the leak-proof layer, and the drug and the penetration enhancer are applied to the surface layer.   The absorbent article according to claim 1 or 2, wherein the penetration enhancer has a solubility parameter value of 15 to 17.   The absorptivity according to any one of claims 1 to 3, wherein a gelling agent of the penetration enhancer is applied to the site where the drug and the penetration enhancer are applied together with the drug and the penetration enhancer. Goods.   The absorbent article in any one of Claims 1-4 in which the superabsorbent polymer whose water absorption amount of the physiological saline by a centrifugal dehydration method is 30 g / g or more is contained in the said absorption layer.

Images