JP4548971B2 - Fiber containing skin care agent - Google Patents
Fiber containing skin care agent Download PDFInfo
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- JP4548971B2 JP4548971B2 JP2001132699A JP2001132699A JP4548971B2 JP 4548971 B2 JP4548971 B2 JP 4548971B2 JP 2001132699 A JP2001132699 A JP 2001132699A JP 2001132699 A JP2001132699 A JP 2001132699A JP 4548971 B2 JP4548971 B2 JP 4548971B2
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- fiber
- skin care
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- Nonwoven Fabrics (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Description
【0001】
【発明の属する技術分野】
本発明は、スキンケア効果を有する繊維及び該繊維を含む繊維集合体に関する。
【0002】
【従来の技術及び発明が解決しようとする課題】
スキンケア効果を有する薬剤を付着させた繊維としては、例えば特開平5−44165号公報に記載のキトサン含有繊維や、特開平8−60547号公報に記載のセリシン含有繊維が知られている。
【0003】
しかし前記公報に記載のキトサンやセリシンは一般に結晶性が高く、水への溶解性が低いので、繊維の加工性が良好でない。具体的には、キトサンやセリシンを繊維に付着させる過程でこれらの薬剤が析出し落下して製造設備を汚染したり、所望の付着量が得られないという不都合がある。また付着にむらが生じて、所望のスキンケア効果を得るためには、その付着量を大幅に高める必要があった。
付着量を高めようとすれば、前述した薬剤の析出や落下が一層生じ、悪循環に陥ってしまう。
【0004】
従って、本発明は、水への溶解性が高く、十分に高いスキンケア効果が得られるスキンケア剤含有繊維を提供することを目的とする。
また本発明は、簡便な製造方法で高いスキンケア効果が得られるスキンケア剤含有繊維を提供することを目的とする。
【0005】
【課題を解決するための手段】
本発明は、スキンケア効果を有する薬剤が、該スキンケア効果を発現するのに十分な量で且つ水によって脱離可能な状態で繊維の表面に付着しているスキンケア剤含有繊維を提供することにより前記目的を達成したものである。
【0006】
また本発明は、繊維処理剤と、1,3−ブチレングリコールと、1,3−ブチレングリコールとは異なる、スキンケア効果を有する薬剤とを混合してなる混合液を、繊維表面に付着させ乾燥させて得られるスキンケア剤含有繊維を提供するものである。
【0007】
更に本発明は、前記のスキンケア剤含有繊維を含有する繊維集合体を提供するものである。
【0008】
【発明の実施の形態】
以下本発明を、その好ましい実施形態に基づき説明する。
本発明のスキンケア剤含有繊維においては、繊維の表面にスキンケア効果を有する薬剤が付着している。薬剤は、水によって繊維の表面から脱離可能な状態で存在している。「水によって繊維の表面から脱離可能な状態で存在している」とは、薬剤が十分に高い水溶性を有していることを意味し、例えば本発明のスキンケア剤含有繊維を、25℃環境下で、該繊維の重量基準で10倍量の水に浸漬したとき、薬剤が水に完全に溶解すれば「水によって繊維の表面から脱離可能な状態で存在している」といえる。
【0009】
薬剤は、スキンケア効果を発現するのに十分な付着量で繊維の表面に付着している。付着量は薬剤の種類により異なるが、同じ薬剤を用いた場合で比較すると、従来のスキンケア剤含有繊維よりも、本発明のスキンケア該含有繊維の方が、少ない付着量で同等のスキンケア効果が発現する。薬剤の付着量を多くすることも出来るが、付着量が多すぎてもスキンケア効果が飽和するので、スキンケア効果と経済性とのバランスで付着量の上限値は決定される。
【0010】
具体的な付着量は、例えば薬剤として後述する植物エキスを用いた場合、スキンケア剤含有繊維の重量に対する薬剤の付着重量は、0.01〜5%、特に0.05〜2重量%程度となる。
【0011】
薬剤は、繊維の表面に連続的又は不連続的に付着しており、例えば粒子の状態でもよく、或いは被膜の状態でもよい。被膜の状態で付着している場合、該被膜は連続膜でもよく、或いは不連続膜でもよい。
【0012】
薬剤を、水によって繊維の表面から脱離可能な状態で存在させるには、▲1▼繊維処理剤又は1,3−ブチレングリコールを用い、これらを薬剤(1,3−ブチレングリコールとは異なる薬剤)と共に繊維の表面に付着させることが有効であることが判明した。▲2▼特に、繊維処理剤を1,3−ブチレングリコールと併用することが一層有効であることが判明した。1,3−ブチレングリコールは薬剤の溶媒として用いることが好ましい。この理由については後述する。また後述するように、1,3−ブチレングリコールは薬剤そのものとしても用いられる。
【0013】
繊維処理剤と共に薬剤を繊維の表面に付着させるには、薬剤と繊維処理剤と必要に応じ1,3−ブチレングリコールとを混合してなる混合液を、繊維表面に付着させ乾燥させて得られる方法が好ましく用いられる(1,3−ブチレングリコールを用いる場合、前記薬剤としては1,3−ブチレングリコールとは異なる薬剤が用いられる)。具体的には、前記混合液中に繊維を浸漬し、次いで混合液から繊維を引き上げて、然る後、繊維を所定手段で乾燥させる方法を用いることが、簡便であることから好ましい。また、繊維に前記混合液を噴霧し、然る後、繊維を所定手段で乾燥させる方法も、同様の理由から好ましい。
【0014】
繊維処理剤は、繊維を製造する場合に用いられる工程油剤の概念を含むものであり、該繊維処理剤としては、陰イオン界面活性剤、陽イオン界面活性剤、非イオン界面活性剤などの界面活性剤を含む繊維処理剤が好ましく用いられる。具体的にはポリオキシアルキル硫酸エステル金属塩、アルキル硫酸エステル金属塩、ポリオキシエチレンアルキルリン酸金属塩、アルキルリン酸金属塩、脂肪酸ジエタノールアミド、脂肪酸ソルビタンエステル(モノ、ジ、トリ)、アルキルグルコシド、ポリグリセリン脂肪酸エステル、アルキルコハク酸金属塩、高級アルコール等が挙げられる。金属塩としてはナトリウム塩やカリウム塩が用いられる。
これらの界面活性剤は、単独でも2種以上を用いてもよい。特に、親水性、繰り返し吸収性、防錆性、不織布加工性の点から、ポリオキシエチレンアルキルリン酸金属塩、アルキルリン酸金属塩、脂肪酸ジエタノールアミド、脂肪酸ソルビタンエステル、アルキルグルコシド、アルキルコハク酸金属塩のうちの1種又は2種以上の組み合わせを用いることが好ましい。
【0015】
繊維処理剤には、帯電防止剤、酸化防止剤,pH調整剤、平滑剤、乳化剤、抗菌剤、防黴剤、香料等を配合することもできる。
【0016】
薬剤としては、前述の通り、スキンケア効果を有するものが用いられる。「スキンケア効果」とは、皮膚のかぶれ防止、消炎、傷つき防止、抗菌等の皮膚の状態を正常にする効能全般を意味する。
【0017】
薬剤としては、各種植物エキス、天然セラミドや疑似セラミド等のセラミド類、コラーゲン、保湿剤〔スクワラン、スクワレン、天然保湿成分(NMF)、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〕、角質素軟化剤〔アルギニン、グアニジン誘導体(例えば、2−(2−ヒドロキシエトキシ)エチルグアニジンの有機酸塩、有機酸としては、コハク酸、グリコ−ル酸、乳酸、リンゴ酸、クエン酸、酒石酸など)〕等が挙げられる。特に水への溶解性、スキンケア効果、コストの点から植物エキス、セラミド類、天然保湿成分(NMF)を用いることが好ましい。セラミド類の中では、天然セラミドは抽出が困難、高価、不安定であるため、疑似セラミドを用いることが好ましい。疑似セラミドとしては保水セラミドやバリヤセラミドを用いることが好ましい。
【0018】
植物エキスは、各種植物の全体又はその葉、樹皮、根及び枝のうちの一又は二以上の箇所を乾燥させ又は乾燥させることなく粉砕した後、常温又は加温下に溶剤によって抽出するか又はソックスレー抽出器等の抽出機具を用いて抽出することによって得られる。植物エキスとしては、スキンケア効果を有するものであれば特に制限無く用いることができる。特に、植物エキスとして、モモ葉エキス、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、オウバクエキス又はユーカリエキスを用いることで、スキンケア効果が一層高くなる。これらのうちでも、スキンケア効果の更に一層の向上の点から、ハマメリスエキス、アスナロエキス又はモモ葉エキスを用いることが好ましい。植物エキスの水への溶解性が高くなる点、及び本発明のスキンケア剤含有繊維を原料とする繊維集合体の加工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、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。
【0019】
疑似セラミドとしては、以下の構造を有する保水性セラミドやバリヤセラミドを用いることが好ましい。
【0020】
【化1】
【0021】
【化2】
【0022】
【化3】
【0023】
【化4】
【0024】
前述の薬剤に加えて、肌への傷つきを抑える目的で、摩擦低減剤を繊維に付着させてもよい。摩擦低減剤としては、有機物質からなる板状結晶体、例えば、アシル化タウリン金属塩(ラウロイルタウリンカルシウム塩、ラウロイル−β−アラニルカルシウム)、ジステアリルエーテル、セチルリン酸亜鉛ナトリウム、Nε−ラウロイン−L−リジン、有機粒子(シリコーンビーズ、ナイロンビーズ、キトサンビーズ等)が挙げられる。
【0025】
薬剤が付着される繊維としては、パルプやコットン等の天然繊維、レーヨンやテンセル等の半合成繊維、ポリエチレン、ポリプロピレン、ポリエチレンテレフタレート、ポリアクリル酸、ポリアミド等の熱可塑性樹脂からなる合成繊維などが用いられる。合成繊維を用いる場合には、前述の熱可塑性樹脂の組み合わせからなる芯鞘型複合繊維やサイド・バイ・サイド型の複合繊維などの複合繊維を用いることもできる。これらの繊維は、1種又は2種以上を用いることができる。
繊維は、長繊維及び短繊維いずれの形態でも用いられる。
【0026】
繊維の繊維径に特に制限はなく、本発明のスキンケア含有繊維の用途に応じて適切な繊維径が選択される。例えば、本発明のスキンケア含有繊維を用いて吸収性物品の表面シートを製造する場合には、繊維径は0.5〜8.9dtex、特に1.5〜5.6dtexであることが、表面シートの風合い、液透過性、隠蔽率、強度等の向上の点から好ましい。
【0027】
本発明によれば、前述したスキンケア含有繊維を含む繊維集合体も提供される。そのような繊維集合体としては、各種不織布、織布、紙、織物などが挙げられる。これらの繊維集合体は、使用者の皮膚に直接に又は間接に当接する用途に好ましく用いられ、使用者の皮膚に対して所望のスキンケア効果を発現する。例えば、前述の通り、繊維集合体として不織布を用い、該不織布を吸収性物品の表面シートとして用いることで、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迅速に治癒される。この場合、薬剤は、体液、例えば尿や汗と接触することによって体液中に溶解拡散して該薬剤に易動性が付与され、使用者の皮膚に移行してスキンケア効果を発現する。
【0028】
特に、繊維集合体として不織布を用い、該不織布を吸収性物品の表面シートとして用いる場合には、薬剤を効果的に皮膚に移行させるために、該不織布の肌接触面側に多量の薬剤を施すことが好ましい。このように薬剤を施すには、不織布として二層以上の多層構造を有するエアスルー不織布を用い、肌接触面側である上層への薬剤の配合量を高めることが望ましい。その場合、肌非接触面側である下層に相対的に繊度の大きな繊維を用い、肌接触面側である上層に相対的に繊度の小さな複合繊維を用いることが、液透過性の向上の点から好ましい。また繊維としてサイド・バイ・サイド型や偏心芯鞘型の複合繊維を用いることで、繊維に立体捲縮がかかり、繊度が小さくても(=風合いが優れる)、繊維間距離を大きくとることができ、液透過性の一層の向上が図れる。同様の考え方として、上層の一部に熱収縮繊維を混合しても良い。
【0029】
【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。
【0030】
〔実施例1〕
ハマメリスエキス(1,3−ブチレングリコール抽出液、一丸ファルコス製)10部と、ポリオキシエチレンアルキルリン酸ナトリウム、アルキルリン酸カリウム及びソルビタンモノステアレート等を含む繊維処理剤90部の5%水溶液とを混合し、均一溶液とした。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(3.3dtex×51mm)を前記溶液に浸漬し、引き上げた後に乾燥させてハマメリスエキスを含む薬剤を繊維の表面に付着させて、ハマメリスエキス含有繊維を得た。ハマメリスエキスを含む薬剤の付着量は、ハマメリスエキス含有繊維の重量の0.5%であった。
【0031】
得られたハマメリスエキス含有繊維をカード機でウェブ化し、次いで該ウエブを熱風処理しエアスルー不織布(坪量30g/m2)を得た。
【0032】
〔実施例2〕
ハマメリスエキスの代わりに、アスナロエキス(1,3−ブチレングリコールとエタノールとの混合溶媒抽出液)を用いた以外は、実施例1と同様にしてアスナロエキス含有繊維、及び該繊維からなるエアスルー不織布を得た。アスナロエキスを含む薬剤の付着量は、アスナロエキス含有繊維の重量の0.4%であった。
【0033】
〔実施例3〕
ハマメリスエキスの代わりに、モモ葉エキス(アルプス工業社製、粉体)を用い、且つモモ葉エキス1部に対して繊維処理剤99部(紡糸油剤の有効分部数)を用いた以外は、実施例1と同様にしてモモ葉エキス含有繊維、及び該繊維からなるエアスルー不織布を得た。モモ葉エキスの付着量は、モモ葉エキス含有繊維の重量の0.2%であった。
【0034】
〔実施例4〕
ハマメリスエキス(1,3−ブチレングリコール抽出液、一丸ファルコス製)30部と、ポリオキシエチレンアルキルリン酸ナトリウム、アルキルリン酸カリウム及びソルビタンモノステアレート等を含む繊維処理剤70部の5%水溶液とを混合し、均一溶液とした。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(3.3dtex×51mm)を前記溶液に浸漬し、引き上げた後に乾燥させてハマメリスエキスを含む薬剤を繊維の表面に付着させて、ハマメリスエキス含有繊維Aを得た。ハマメリスエキスを含む薬剤の付着量は、ハマメリスエキス含有繊維の重量の0.5%であった。
【0035】
これとは別に、ハマメリスエキス(1,3−ブチレングリコール抽出液、一丸ファルコス製)10部と、アルキルリン酸カリウム及び脂肪酸ジエタノールアミド等を含む繊維処理剤90部の5%水溶液とを混合し、均一溶液とした。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(5.6dtex×51mm)を前記溶液に浸漬し、引き上げた後に乾燥させてハマメリスエキスを含む薬剤を繊維の表面に付着させて、ハマメリスエキス含有繊維Bを得た。ハマメリスエキスを含む薬剤の付着量は、ハマメリスエキス含有繊維の重量の0.5%であった。
【0036】
得られたハマメリスエキス含有繊維A及びBをそれぞれカード機でウェブ化し、次いで各ウエブを積層した後に熱風処理し2層構造のエアスルー不織布を得た。
【0037】
〔比較例1〕
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(5.5dtex×51mm)をカード機でウェブ化し、次いで該ウエブを熱風処理しエアスルー不織布を得た。この不織布上に、ポリオレフィンワックス100部とミリスチルイソプロピレート20部との混合物を、5g/m2の塗工量で10mm間隔、100mm幅にわたり塗工した。
【0038】
〔比較例2〕
モモ葉エキスの代わりに、セリシン1部を用いた以外は実施例3と同様にしてセリシン含有繊維、及び該繊維からなるエアスルー不織布を得た。セリシンの付着量は、セリシン含有繊維の重量の2%であった。
【0039】
〔性能評価〕
実施例及び比較例で得られた繊維及び不織布に関し、以下の方法で薬剤の水への溶解性、不織布上での初期液流れ、不織布の繰り返し吸収性、及びかぶれ防止性を評価した。その結果を以下の表1に示す。
【0040】
〔薬剤の水への溶解性〕
25℃環境下で、不織布の重量基準で10倍量の水に不織布を浸漬し、薬剤が水に完全に溶解した場合を○とし、水が白濁あるいは沈殿物が生じたら×とした。
【0041】
〔初期液流れ及び繰り返し吸収性評価法〕
NBKPパルプ100部と吸水性ポリマー(ポリアクリル酸架橋体、生理食塩水の吸収量50g/g)100部とを空気流中で均一混合し、全体の坪量が300g/m2となるように、薄葉紙(坪量20g/m2)上に堆積させ吸収コアを形成した。この吸収コアを薄葉紙で包み込んで吸収体を得た。
実施例及び比較例で得られた不織布を表面シートとして用い、また前記吸収体及びポリエチレンシートからなる裏面シートを用いて使い捨ておむつを製造した。
【0042】
得られたおむつを45°の傾斜板に固定した。この状態下、おむつの一端部から200mmの位置に生理食塩水を50g/1回流したときの、表面シート上での液流れ距離を測定した。同様の測定を3回繰り返し、その平均値を不織布上での初期液流れの値とした。
不織布の繰り返し吸収性は、4回目の測定において生理食塩水の吸収がスムーズに行われた場合を○とし、液流れ距離が200mmを超え、おむつの他端部から生理食塩水が漏れてしまう場合を×とした。
【0043】
〔かぶれ防止性〕
前述の〔初期液流れ及び繰り返し吸収性評価法〕で用いたおむつと同様のおむつを15名のモニターに2週間使用させて、使用期間中の皮膚のかぶれの経験度合いを以下の基準で評価した。
×:モニターの半数以上がかぶれを経験
△:モニターの3人以上5人以下がかぶれを経験
○:モニターの2人以下がかぶれを経験
【0044】
【表1】
【0045】
表1に示す結果から明らかなように、各実施例の繊維及び不織布(本発明品)は、薬剤の水に対する溶解性が高く、スキンケア効果が高いことが判る。また薬剤を付着させたことに起因する液透過性が阻害されていないことも判る。
【0046】
【発明の効果】
本発明のスキンケア剤含有繊維及び該繊維を含む繊維集合体は、薬剤の水への溶解性が高く、スキンケア効果が十分に高くなる。
また本発明のスキンケア剤含有繊維及び該繊維を含む繊維集合体は、簡便な方法で製造できる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fiber having a skin care effect and a fiber assembly including the fiber.
[0002]
[Prior art and problems to be solved by the invention]
As fibers to which a drug having a skin care effect is attached, for example, chitosan-containing fibers described in JP-A-5-44165 and sericin-containing fibers described in JP-A-8-60547 are known.
[0003]
However, chitosan and sericin described in the above publication generally have high crystallinity and low solubility in water, so that the processability of fibers is not good. Specifically, in the process of attaching chitosan or sericin to the fibers, these chemicals are deposited and fall to contaminate the production equipment, and a desired amount of adhesion cannot be obtained. Moreover, in order to obtain unevenness in adhesion and to obtain a desired skin care effect, it is necessary to greatly increase the adhesion amount.
If an attempt is made to increase the amount of adhesion, the above-described deposition and dropping of the drug will occur further, resulting in a vicious circle.
[0004]
Accordingly, an object of the present invention is to provide a skin care agent-containing fiber that has a high solubility in water and a sufficiently high skin care effect.
Moreover, an object of this invention is to provide the skin care agent containing fiber from which a high skin care effect is acquired with a simple manufacturing method.
[0005]
[Means for Solving the Problems]
The present invention provides a skin care agent-containing fiber in which a drug having a skin care effect is attached to the surface of the fiber in an amount sufficient to exhibit the skin care effect and in a state of being removable with water. The goal has been achieved.
[0006]
In addition, the present invention provides a fiber treatment agent, 1,3-butylene glycol, and a mixed liquid obtained by mixing a drug having a skin care effect different from 1,3-butylene glycol, and is attached to the fiber surface and dried. The skin care agent containing fiber obtained by providing is provided.
[0007]
Furthermore, this invention provides the fiber assembly containing the said skin care agent containing fiber.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on preferred embodiments thereof.
In the skin care agent-containing fiber of the present invention, a drug having a skin care effect is attached to the surface of the fiber. The drug is present in a state where it can be detached from the surface of the fiber with water. “Present in a state where it can be detached from the surface of the fiber by water” means that the drug has a sufficiently high water solubility. For example, the skin care agent-containing fiber of the present invention is treated at 25 ° C. When the chemical is completely dissolved in water when immersed in 10 times the amount of water based on the weight of the fiber under the environment, it can be said that "there exists in a state where it can be detached from the surface of the fiber by water".
[0009]
The drug adheres to the surface of the fiber in an amount sufficient to exhibit a skin care effect. The amount of adhesion varies depending on the type of drug, but when compared with the same drug, the skin care fiber of the present invention exhibits the same skin care effect with a smaller amount of adhesion than the conventional skin care agent-containing fiber. To do. Although the adhesion amount of the drug can be increased, the skin care effect is saturated even if the adhesion amount is too large, and therefore the upper limit value of the adhesion amount is determined by the balance between the skin care effect and the economical efficiency.
[0010]
The specific adhesion amount is, for example, when the plant extract described later is used as the drug, the drug adhesion weight with respect to the weight of the skin care agent-containing fiber is about 0.01 to 5%, particularly about 0.05 to 2% by weight. .
[0011]
The drug adheres continuously or discontinuously to the surface of the fiber, and may be, for example, in the form of particles or in the form of a coating. When attached in the form of a film, the film may be a continuous film or a discontinuous film.
[0012]
In order for the drug to exist in a state where it can be detached from the fiber surface with water, (1) a fiber treatment agent or 1,3-butylene glycol is used, and these are used as a drug (a drug different from 1,3-butylene glycol). ) And the fiber surface was found to be effective. (2) In particular, it has been found that it is more effective to use the fiber treating agent in combination with 1,3-butylene glycol. 1,3-butylene glycol is preferably used as a solvent for the drug. The reason for this will be described later. As will be described later, 1,3-butylene glycol is also used as a drug itself.
[0013]
In order to attach the drug together with the fiber treatment agent to the surface of the fiber, a mixed liquid obtained by mixing the drug, the fiber treatment agent and 1,3-butylene glycol as necessary is attached to the fiber surface and dried. The method is preferably used (when 1,3-butylene glycol is used, a drug different from 1,3-butylene glycol is used as the drug). Specifically, it is preferable to use a method of immersing fibers in the mixed solution, then pulling up the fibers from the mixed solution, and then drying the fibers by a predetermined means. Further, a method of spraying the mixed solution on the fibers and then drying the fibers by a predetermined means is also preferable for the same reason.
[0014]
The fiber treatment agent includes the concept of a process oil agent used in the production of fibers, and the fiber treatment agent includes an interface such as an anionic surfactant, a cationic surfactant, and a nonionic surfactant. A fiber treatment agent containing an activator is preferably used. Specifically, polyoxyalkyl sulfate metal salt, alkyl sulfate metal salt, polyoxyethylene alkyl phosphate metal salt, alkyl phosphate metal salt, fatty acid diethanolamide, fatty acid sorbitan ester (mono, di, tri), alkyl glucoside , Polyglycerin fatty acid ester, metal alkyl succinate, higher alcohol and the like. As the metal salt, sodium salt or potassium salt is used.
These surfactants may be used alone or in combination of two or more. In particular, polyoxyethylene alkyl phosphate metal salts, alkyl phosphate metal salts, fatty acid diethanolamides, fatty acid sorbitan esters, alkyl glucosides, and alkyl succinic acid metals in terms of hydrophilicity, repetitive absorption, rust prevention, and nonwoven fabric processability It is preferable to use one or a combination of two or more of the salts.
[0015]
In the fiber treatment agent, an antistatic agent, an antioxidant, a pH adjuster, a smoothing agent, an emulsifier, an antibacterial agent, an antifungal agent, a fragrance, and the like can be blended.
[0016]
As the drug, those having a skin care effect are used as described above. “Skin care effect” means all the effects of normalizing skin conditions such as skin irritation prevention, anti-inflammation, damage prevention, and antibacterial effects.
[0017]
Examples of the drug include various plant extracts, ceramides such as natural ceramide and pseudo-ceramide, collagen, moisturizer (squalane, squalene, natural moisturizing component (NMF), 1,3-butylene glycol, propylene glycol, glycerin, etc.), keratin Softener [Arginine, guanidine derivative (for example, organic acid salt of 2- (2-hydroxyethoxy) ethylguanidine, organic acids include succinic acid, glycolic acid, lactic acid, malic acid, citric acid, tartaric acid, etc.)] Etc. In particular, it is preferable to use a plant extract, a ceramide, or a natural moisturizing component (NMF) from the viewpoints of solubility in water, skin care effect, and cost. Among ceramides, natural ceramide is difficult to extract, expensive, and unstable, and therefore it is preferable to use pseudoceramide. As the pseudoceramide, it is preferable to use water-retaining ceramide or barrier ceramide.
[0018]
The plant extract is pulverized without drying or drying one or more parts of the whole plant or its leaves, bark, roots and branches, and then extracted with a solvent at room temperature or under heating, or It can be obtained by extraction using an extractor such as a Soxhlet extractor. Any plant extract can be used without particular limitation as long as it has a skin care effect. In particular, the use of a peach leaf extract, cocoon extract, hamamelis extract, asunalo extract, aloe extract, agar extract or eucalyptus extract as the plant extract further enhances the skin care effect. Among these, from the point of further improving the skin care effect, it is preferable to use a Hamelis extract, an Asunalo extract or a peach leaf extract. From the point that the solubility of the plant extract in water is high, and when heat treatment is performed in the processing step of the fiber assembly using the skin care agent-containing fiber of the present invention as a raw material, the plant extract does not require explosion proofing, A 1,3-butylene glycol extract is preferred.
[0019]
As the pseudo-ceramide, it is preferable to use water-retaining ceramide or barrier ceramide having the following structure.
[0020]
[Chemical 1]
[0021]
[Chemical 2]
[0022]
[Chemical 3]
[0023]
[Formula 4]
[0024]
In addition to the aforementioned agents, a friction reducing agent may be attached to the fibers for the purpose of suppressing damage to the skin. As the friction reducing agent, a plate-like crystal made of an organic substance, for example, acylated taurine metal salt (lauroyl taurine calcium salt, lauroyl-β-alanyl calcium), distearyl ether, sodium cetyl phosphate, Nε-lauroin— Examples include L-lysine and organic particles (silicone beads, nylon beads, chitosan beads, etc.).
[0025]
The fibers to which the drug is attached include natural fibers such as pulp and cotton, semi-synthetic fibers such as rayon and tencel, and synthetic fibers made of thermoplastic resins such as polyethylene, polypropylene, polyethylene terephthalate, polyacrylic acid and polyamide. It is done. In the case of using a synthetic fiber, a composite fiber such as a core-sheath type composite fiber or a side-by-side type composite fiber made of a combination of the above-described thermoplastic resins can also be used. These fibers can be used alone or in combination of two or more.
The fiber can be used in the form of either a long fiber or a short fiber.
[0026]
There is no restriction | limiting in particular in the fiber diameter of a fiber, A suitable fiber diameter is selected according to the use of the skin care containing fiber of this invention. For example, when the surface sheet of an absorbent article is manufactured using the skin care-containing fiber of the present invention, the fiber diameter is 0.5 to 8.9 dtex, particularly 1.5 to 5.6 dtex. From the viewpoint of improving the texture, liquid permeability, concealment rate, strength and the like.
[0027]
According to this invention, the fiber assembly containing the skin care containing fiber mentioned above is also provided. Examples of such fiber aggregates include various non-woven fabrics, woven fabrics, paper, and woven fabrics. These fiber aggregates are preferably used for applications that directly or indirectly contact the user's skin and exhibit a desired skin care effect on the user's skin. For example, as described above, by using a nonwoven fabric as a fiber assembly and using the nonwoven fabric as a surface sheet of an absorbent article, skin irritation and inflammation are suppressed, and when irritation or irritation occurs, they can be quickly Healed. In this case, the drug dissolves and diffuses in the body fluid by contact with a body fluid such as urine or sweat, imparts mobility to the drug, and moves to the user's skin to exhibit a skin care effect.
[0028]
In particular, when a nonwoven fabric is used as the fiber assembly and the nonwoven fabric is used as a surface sheet of an absorbent article, a large amount of drug is applied to the skin contact surface side of the nonwoven fabric in order to effectively transfer the drug to the skin. It is preferable. In order to apply the drug in this manner, it is desirable to use an air-through non-woven fabric having a multilayer structure of two or more layers as the non-woven fabric and increase the amount of the drug in the upper layer on the skin contact surface side. In that case, it is possible to improve the liquid permeability by using fibers with relatively high fineness in the lower layer on the skin non-contact surface side and using composite fibers with relatively small fineness in the upper layer on the skin contact surface side. To preferred. In addition, by using side-by-side type or eccentric core-sheath type composite fiber as the fiber, even if the fiber is sterically crimped and the fineness is small (= the texture is excellent), the distance between fibers can be increased. And the liquid permeability can be further improved. As a similar idea, heat shrink fibers may be mixed in a part of the upper layer.
[0029]
【Example】
In the following examples, unless otherwise specified, “%” and “part” mean “% by weight” and “part by weight”, respectively.
[0030]
[Example 1]
10 parts of Hamamelis extract (1,3-butylene glycol extract, manufactured by Ichimaru Falcos) and a 5% aqueous solution of 90 parts of a fiber treatment agent containing sodium polyoxyethylene alkylphosphate, potassium alkylphosphate, sorbitan monostearate, etc. Were mixed to obtain a homogeneous solution. A core-sheath type composite fiber (3.3 dtex × 51 mm) whose core is made of polypropylene and whose sheath is made of polyethylene is dipped in the above solution, dried, and dried to adhere a medicine containing a Hamelis extract to the surface of the fiber. An extract-containing fiber was obtained. The adhesion amount of the medicine containing the Hamelis extract was 0.5% of the weight of the Hamelis extract-containing fiber.
[0031]
The obtained Hamelis extract-containing fiber was converted into a web using a card machine, and then the web was treated with hot air to obtain an air-through nonwoven fabric (basis weight 30 g / m 2 ).
[0032]
[Example 2]
An asunalo extract-containing fiber and an air-through non-woven fabric made of the fiber were used in the same manner as in Example 1 except that an asnalo extract (a mixed solvent extract of 1,3-butylene glycol and ethanol) was used instead of the hamamelis extract. Obtained. The adhesion amount of the medicine containing asunalo extract was 0.4% of the weight of the asunalo extract-containing fiber.
[0033]
Example 3
Implemented except that peach leaf extract (Alps Kogyo Co., Ltd., powder) was used instead of Hamamelis extract, and 99 parts of fiber treatment agent (effective part of spinning oil) was used for 1 part of peach leaf extract. In the same manner as in Example 1, a peach leaf extract-containing fiber and an air-through nonwoven fabric comprising the fiber were obtained. The amount of peach leaf extract attached was 0.2% of the weight of the peach leaf extract-containing fiber.
[0034]
Example 4
30% of Hamamelis extract (1,3-butylene glycol extract, manufactured by Ichimaru Falcos) and a 5% aqueous solution of 70 parts of a fiber treatment agent containing sodium polyoxyethylene alkylphosphate, potassium alkylphosphate, sorbitan monostearate, etc. Were mixed to obtain a homogeneous solution. A core-sheath type composite fiber (3.3 dtex × 51 mm) whose core is made of polypropylene and whose sheath is made of polyethylene is dipped in the above solution, dried, and dried to adhere a medicine containing a Hamelis extract to the surface of the fiber. Extract-containing fiber A was obtained. The adhesion amount of the medicine containing the Hamelis extract was 0.5% of the weight of the Hamelis extract-containing fiber.
[0035]
Separately, 10 parts of Hamameris extract (1,3-butylene glycol extract, manufactured by Ichimaru Falcos) and a 5% aqueous solution of 90 parts of a fiber treatment agent containing potassium alkyl phosphate and fatty acid diethanolamide, A homogeneous solution was obtained. A core-sheath type composite fiber (5.6 dtex × 51 mm) having a polypropylene core and a sheath made of polyethylene is dipped in the solution, pulled up, dried, and a medicine containing a Hamelis extract is attached to the surface of the fiber. Extract-containing fiber B was obtained. The adhesion amount of the medicine containing the Hamelis extract was 0.5% of the weight of the Hamelis extract-containing fiber.
[0036]
The obtained Hamamelis extract-containing fibers A and B were each made into a web using a card machine, and then each web was laminated and then treated with hot air to obtain a two-layer air-through nonwoven fabric.
[0037]
[Comparative Example 1]
A core-sheath composite fiber (5.5 dtex × 51 mm) having a core of polypropylene and a sheath of polyethylene was formed into a web by a card machine, and the web was then hot-air treated to obtain an air-through nonwoven fabric. On this nonwoven fabric, a mixture of 100 parts of polyolefin wax and 20 parts of myristyl isopropylate was applied at a coating amount of 5 g / m 2 over 10 mm intervals and 100 mm width.
[0038]
[Comparative Example 2]
A sericin-containing fiber and an air-through nonwoven fabric comprising the fiber were obtained in the same manner as in Example 3 except that 1 part of sericin was used instead of the peach leaf extract. The amount of sericin attached was 2% of the weight of the sericin-containing fiber.
[0039]
[Performance evaluation]
With respect to the fibers and nonwoven fabrics obtained in Examples and Comparative Examples, the following methods evaluated the solubility of the drug in water, the initial liquid flow on the nonwoven fabric, the repeated absorbability of the nonwoven fabric, and the rash prevention property. The results are shown in Table 1 below.
[0040]
[Solubility of drug in water]
In a 25 ° C. environment, the nonwoven fabric was dipped in 10 times the amount of water based on the weight of the nonwoven fabric.
[0041]
[Initial liquid flow and repeated absorbability evaluation method]
100 parts of NBKP pulp and 100 parts of a water-absorbing polymer (polyacrylic acid crosslinked body, absorption amount of physiological saline 50 g / g) are uniformly mixed in an air stream so that the total basis weight is 300 g / m 2. Then, it was deposited on thin paper (basis weight 20 g / m 2 ) to form an absorbent core. The absorbent core was wrapped with thin paper to obtain an absorbent body.
The nonwoven fabric obtained by the Example and the comparative example was used as a surface sheet, and the disposable diaper was manufactured using the back surface sheet which consists of the said absorber and a polyethylene sheet.
[0042]
The obtained diaper was fixed to a 45 ° inclined plate. Under this condition, the liquid flow distance on the top sheet was measured when physiological saline was flowed 50 g / 1 times at a position 200 mm from one end of the diaper. The same measurement was repeated three times, and the average value was taken as the initial liquid flow value on the nonwoven fabric.
The repeated absorbability of the nonwoven fabric is ○ when the physiological saline is smoothly absorbed in the fourth measurement, the liquid flow distance exceeds 200 mm, and the physiological saline leaks from the other end of the diaper. Was marked with x.
[0043]
[Anti-rash]
Diapers similar to the diapers used in the above-mentioned [Initial fluid flow and repeated absorbability evaluation method] were used on 15 monitors for 2 weeks, and the degree of experience of skin irritation during the use period was evaluated according to the following criteria .
×: More than half of monitors experienced rash △: More than 3 and less than 5 monitors experienced rash ○: Less than 2 monitors experienced rash [0044]
[Table 1]
[0045]
As is apparent from the results shown in Table 1, it can be seen that the fibers and non-woven fabrics of the examples (product of the present invention) have high solubility of the drug in water and have a high skin care effect. Moreover, it turns out that the liquid permeability resulting from having adhered the chemical | medical agent is not inhibited.
[0046]
【The invention's effect】
The skin care agent-containing fiber and the fiber assembly containing the fiber of the present invention have high solubility of the drug in water, and the skin care effect is sufficiently high.
Moreover, the skin care agent containing fiber of this invention and the fiber assembly containing this fiber can be manufactured by a simple method.
Claims (4)
前記薬剤がハマメリスエキスであり、
前記薬剤は、該薬剤と繊維処理剤と、1,3−ブチレングリコールとを混合してなる混合液を、繊維表面に付着させ乾燥させることで、繊維の表面に付着させたものであり、
吸収性物品の表面シートに用いられるスキンケア剤含有繊維。A skin care agent-containing fiber, wherein the agent having a skin care effect is attached to the surface of the fiber in an amount sufficient to exhibit the skin care effect and in a state of being removable by water ,
The drug is a Hamelis extract;
The drug is a liquid mixture obtained by mixing the drug, a fiber treatment agent, and 1,3-butylene glycol, and is adhered to the fiber surface by adhering to the fiber surface and drying,
Skin care agent-containing fibers used for the surface sheet of absorbent articles .
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