JP4312939B2 - Top sheet of body fluid absorbing article - Google Patents
Top sheet of body fluid absorbing article Download PDFInfo
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- JP4312939B2 JP4312939B2 JP2000271881A JP2000271881A JP4312939B2 JP 4312939 B2 JP4312939 B2 JP 4312939B2 JP 2000271881 A JP2000271881 A JP 2000271881A JP 2000271881 A JP2000271881 A JP 2000271881A JP 4312939 B2 JP4312939 B2 JP 4312939B2
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- topsheet
- body fluid
- polyethylene
- surface sheet
- skin
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- Expired - Fee Related
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Description
【０００１】
【発明の属する分野】
この発明は、生理用物品、失禁シート、紙おむつ等の体液吸収用物品、特に表面材とのこすれによる肌トラブルの発生を防止する体液吸収用物品の表面材に関する。
【０００２】
【従来の技術】
従来、生理経血、尿等の体液を吸収するための物品として、透過可能な表面シートと体液不透過性のバックシートとの間に破砕パルプ等からなる吸収体を内包してなる生理用ナプキン、失禁シート、紙おむつ、おりものシート等の体液吸収用物品は公知である。かかる体液吸収用物品の問題点として、物品の使用時に発生する肌トラブルが指摘されている。本出願人の調査によると、生理用ナプキンの使用において、約６０％の着用者が肌トラブルを経験しており、肌トラブルの主な症状としては、かゆみ、赤み、ただれ並びに張り付き等が報告されている。かかる肌トラブルの要因は、表面のべたつき、表面シートによる肌のこすれ、表面シートの肌への張り付き、装着時のムレ、細菌等による炎症等が挙げられる。本発明者らは体液吸収用物品の使用に際してみられる肌トラブルの一つの要因である表面シートによる肌のこすれに着目し、肌にやさしい表面シートのための表面材の開発を行った。
【０００３】
【発明が解決しようとする課題】
この発明は、表面シートと着用者の皮膚との接触時のこすれを低減するために、着用者の肌に最も近接して位置する表面シートの摩擦抵抗を低減させることを課題とする。このために、本発明者らは種々の原料を添加剤として検討した結果、化粧品原料、特にスキンケア材料から選択された添加剤を配合した樹脂フィルム又は不織布が最も優れていることを見いだした。添加剤としてのスキンケア材料は、皮膚に対するスムースな感触をもたらし、且皮膚に対して刺激が少なく、更に樹脂への良好な混合成分であることが要求される。
【０００４】
【課題を解決するための手段】
上記課題を解決するためにこの発明が採った手段は、表面シートとバックシートとの間に吸収体を配置した体液吸収用物品の、該表面シートに酸化亜鉛又はマカデミアンナッツ油脂肪酸フィトステリルを０．１質量％〜１０質量％の範囲で配合し、表面シートによる肌のこすれを防止して、肌のトラブルを低減したことを特徴とする。
【０００５】
表面シートは、表面に流出してきた体液を吸収体側に移動させ得る小さな孔を多数形成した穴あきフィルムで形成されており、好ましくは２層構造であり、肌側のフィルム層をポリエチレンで、吸収体側のフィルム層をポリエチレンとエチレン酢酸ビニル共重合体で形成し、少なくとも肌側に位置するフィルム層に添加剤が配合されていることを特徴とする。しかしながら、ポリエチレンからなる単層構造であっても良い。
【０００６】
繊維構造の表面シートは、ポリエチレン、ポリプロピレン又はポリエチレン／ポリプロピレン複合体からなり、繊維の表面に添加剤がコーティングされていることを特徴とする。
【０００８】
【発明の実施の形態】
この発明の好ましい実施の形態を、以下に詳細に説明する。尚、以下の説明は生理用ナプキンの実施形態についてなされているが、この発明は生理用ナプキンに限られるものではなく、使い捨ておしめ、失禁シート、おりものシート等の体液を吸収するための種々の物品に同様に適用することが出来る。生理用ナプキンは、体液を透過し得る表面シートと体液の透過を阻止するバックシートとの間に破砕パルプ等の吸収体を内包した従来周知の構造を有しており、表面シート、バックシート及び吸収体の材質、形状、厚み、吸収力等は特に限定されるものではない。吸収体は、破砕パルプに体液を吸収する高分子粒子を混合したものであっても良い。
【０００９】
表面シートは、樹脂フィルム若しくは不織布からなる表面材で形成される。樹脂フィルムは、単層若しくは二層の構造体からなり、体液を表面側から吸収体側に良好に移行させるために小さな孔が多数形成された穴あきフィルムの構造を有する。単層のフィルム樹脂は、フィルムへの成形性、機械的強度、柔軟性等の点からポリエチレンが好適であり、二層の場合には肌側のフィルム層をポリエチレンで、吸収体側のフィルム層をポリエチレンとエチレン酢酸ビニル共重合体の混合体が最も適しているが、これに限られないことは勿論である。化粧品原料から選択された添加剤が、フィルム樹脂に配合される。二層構造のフィルムは、肌側に位置するフィルム層に添加剤が配合される。エチレン酢酸ビニル共重合体の配合は、フィルムに柔軟性をもたらすと共に、ヒートシール性を向上させ低い温度でのヒートシールが可能となるため、吸収性物品への製造時に熱による他の素材への影響を防止することが可能となる。樹脂フィルムへの添加剤の配合は、練り混みの手段により適用される。穴あきフィルムは、孔の径が小さく液のスムースな移行を困難とするため、親水剤を配合して移行性の向上を図ることが好ましい。配合する親水剤としては、グリセリン、グリセリン脂肪酸エステル、親油型モノオレイン酸グリセリン、親油型モノステアリン酸グリセリン、ポリエチレングリコール、ポリオキシエチレンラウリルエーテル、モノオレイン酸ソルビタン、モノステアリン酸ソルビタン、モノラウリン酸ポリエチレングリコール等を挙げることが出来る。不織布は、ポリエチレン、ポリプロピレン又はポリエチレン／ポリプロピレン複合体からなり、繊維の表面に添加剤がコーティングの手段により適用される。
【００１０】
添加剤は、化粧品原料、特にスキンケア材料として化粧品に配合される配合剤が好適である。かかる配合剤としては、先ずマカデミアンナッツ油コレステリル誘導体、マカデミアンナッツ油脂肪酸フィトステリル、ジ（コレステリル、オクチルドデシル）Ｎ−ラウロイル−Ｌ−グルタミン酸エステル等の保湿剤、炭酸カルシウム、酸化亜鉛等のパウダー類が挙げられる。更にアロエエキス、ヨモギエキス、キトサン、シルクパウダー等の原料も使用することが出来る。マカデミアンナッツ油コレステリル誘導体、マカデミアンナッツ油脂肪酸フィトステリル、ジ（コレステリル、オクチルドデシル）Ｎ−ラウロイル−Ｌ−グルタミン酸エステル等の保湿剤、炭酸カルシウム、酸化亜鉛等のパウダー類は、耐熱性があるために約２３０℃の高温で押出成形される樹脂フィルムの添加剤として好適であり、特に酸化亜鉛、炭酸カルシウム等のパウダー類が優れている。添加剤は、樹脂フィルムの上層（肌側層）への練り込みで充分であり、下層（吸収体側層）への練り混みは特に必要としない。表面シートへの添加剤の配合量は、フィルムの上層（肌側層）の重量に対して０.１〜１０％、好ましくは０.５〜５％、最も好ましくは１.０％である。
【００１１】
アロエエキス、ヨモギエキス、キトサン、シルクパウダー等の原料は、耐熱性が小さいため、押出成形される樹脂フィルムの添加剤としては不適当であるが、不織布を形成するための前記樹脂繊維にコーティング手段により適用する添加剤として使用することが出来る。しかしながら、コーティングにより繊維の表面に適用した場合、剥離してくるおそれがあり、安全性及び効果の持続性に問題があると共に、加工工程が複雑化してくるおそれがある。尚、シリコンオイル、シリコンパウダー、アミド系スリップ剤等のシリコン系材料は、フィルム成形時に上層（肌側層）から下層（吸収体側層）に材料が移動し下層（吸収体側）に配合された親水剤の効果を削減し、シリコンによる撥水性が強く現れて体液の下方（吸収体への）移動を阻害するために、添加剤としては不適当であった。
【００１２】
【実施例】
肌側層の樹脂原料として、酸化チタンを配合した直鎖状低密度ポリエチレンに添加剤を配合し樹脂材料とした。吸収体側層の樹脂原料として、エチレン酢酸ビニル共重合体、低密度ポリエチレン、親油型モノオレフィン酸グリセリン並びにモノラウリン酸ソルビタンを配合したものを用いた。各樹脂原料を溶融し押出成形で穴あきフィルムを製造した。添加剤としては、マカデミアンナッツ油脂肪酸フィトステリル、酸化亜鉛、炭酸カルシウム、シリコンオイル、並びにシリコンオイルにマカデミアンナッツ油脂肪酸フィトステリルを混合したものを個別に配合して試料フィルムを製造した。各添加剤の配合率と通液性及び評価は表１の通りである。比較対象品は、添加剤が配合されていない二層構造の穴あきフィルムである。評価は、試料フィルム上にシリコンゴム製の人工皮膚を乗せて乾燥時と、模擬経血で湿らせたときの状態での試料フィルムの表面摩擦抵抗を測定して評価した。比較品と同程度のものを評価○とし、これより優れているものを評価◎とした。表１から明らかなように、本発明の添加剤を配合した試料フィルム▲１▼、▲２▼、▲３▼は吸収性物品の表面材として優れている。
【００１３】
【表１】
【発明の効果】
この発明によれば、体液の排出側に最も近接して位置する表面シートを化粧料原料、特にスキンケア材料から選択された材料を添加剤として添加し、表面シートによる肌のこすれを防止し、肌にやさしい表面シートを提供することが出来るので、体液吸収物品の着用時に発生する着用者の肌のトラブルを低減することが出来る。[0001]
[Field of the Invention]
The present invention relates to a body fluid absorbing article such as a sanitary article, an incontinence sheet, or a paper diaper, and particularly to a surface material of a body fluid absorbing article that prevents the occurrence of skin troubles due to rubbing with the surface material.
[0002]
[Prior art]
Conventionally, as a product for absorbing body fluid such as menstrual blood, urine and the like, a sanitary napkin in which an absorbent body made of crushed pulp or the like is included between a permeable top sheet and a body fluid impermeable back sheet Body fluid absorbing articles such as incontinence sheets, disposable diapers, and cage sheets are known. As a problem of such an article for absorbing body fluid, skin troubles that occur during use of the article have been pointed out. According to the applicant's survey, about 60% of wearers experienced skin problems when using sanitary napkins, and itching, redness, soreness and sticking were reported as the main symptoms of skin problems. ing. Factors for such skin troubles include stickiness of the surface, rubbing of the skin due to the surface sheet, sticking of the surface sheet to the skin, swelling during wearing, inflammation due to bacteria, and the like. The inventors of the present invention have developed a surface material for a surface sheet that is gentle to the skin, focusing on the rubbing of the skin caused by the surface sheet, which is one of the causes of skin troubles that occur when using an article for absorbing body fluids.
[0003]
[Problems to be solved by the invention]
This invention makes it a subject to reduce the frictional resistance of the surface sheet located nearest to a wearer's skin, in order to reduce the rubbing at the time of contact with a surface sheet and a wearer's skin. Therefore, as a result of studying various raw materials as additives, the present inventors have found that a resin film or a nonwoven fabric in which an additive selected from cosmetic raw materials, particularly skin care materials, is most excellent. The skin care material as an additive is required to provide a smooth feel to the skin, have little irritation to the skin, and be a good mixed component to the resin.
[0004]
[Means for Solving the Problems]
Means taken by this invention to solve the above problems, the body fluid absorbent article arranged an absorber between the topsheet and the backsheet, a zinc oxide or macadamia nut oil fatty acid phytosteryl to the topsheet 0 It mix | blends in the range of 1 mass%-10 mass%, prevents the skin from rubbing by a surface sheet, and reduced the trouble of the skin .
[0005]
The top sheet is formed of a perforated film in which a large number of small holes that can move body fluid that has flowed out to the surface to the absorber side are formed, and preferably has a two-layer structure, and the film layer on the skin side is absorbed by polyethylene. The body-side film layer is formed of polyethylene and an ethylene vinyl acetate copolymer, and an additive is blended in at least the film layer located on the skin side. However, it may be a single layer structure made of polyethylene.
[0006]
The surface sheet having a fiber structure is made of polyethylene, polypropylene, or a polyethylene / polypropylene composite, and the surface of the fiber is coated with an additive.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described in detail below. Although the following description is made with respect to an embodiment of a sanitary napkin, the present invention is not limited to a sanitary napkin, and various types for absorbing bodily fluids such as disposable diapers, incontinence sheets, and cage sheets. It can be applied to articles as well. The sanitary napkin has a conventionally known structure in which an absorbent body such as pulverized pulp is included between a top sheet that can permeate body fluid and a back sheet that prevents permeation of body fluid. The material, shape, thickness, absorption power, etc. of the absorber are not particularly limited. The absorber may be a mixture of crushed pulp and polymer particles that absorb body fluid.
[0009]
A surface sheet is formed with the surface material which consists of a resin film or a nonwoven fabric. The resin film has a single-layer or double-layer structure, and has a perforated film structure in which a large number of small holes are formed in order to transfer body fluid from the surface side to the absorber side. The single layer film resin is preferably polyethylene from the viewpoint of moldability to film, mechanical strength, flexibility, etc. In the case of two layers, the skin side film layer is made of polyethylene and the absorber side film layer is made of Of course, a mixture of polyethylene and ethylene vinyl acetate copolymer is most suitable, but not limited thereto. Additives selected from cosmetic raw materials are blended into the film resin. In a film having a two-layer structure, an additive is blended in a film layer located on the skin side. The compounding of the ethylene vinyl acetate copolymer provides flexibility to the film and improves heat sealability and enables heat sealing at a low temperature. It is possible to prevent the influence. The additive is added to the resin film by means of kneading. Since the holey film has a small hole diameter and makes it difficult to smoothly transfer the liquid, it is preferable to improve the transferability by adding a hydrophilic agent. Examples of the hydrophilic agent to be added include glycerin, glycerin fatty acid ester, lipophilic glyceryl monooleate, lipophilic glyceryl monostearate, polyethylene glycol, polyoxyethylene lauryl ether, sorbitan monooleate, sorbitan monostearate, monolauric acid Examples include polyethylene glycol. The nonwoven fabric is made of polyethylene, polypropylene or a polyethylene / polypropylene composite, and an additive is applied to the surface of the fiber by means of coating.
[0010]
The additive is preferably a compounding ingredient blended into cosmetics as a cosmetic raw material, particularly as a skin care material. As such compounding agents, macadamian nut oil cholesteryl derivatives, macadamian nut oil fatty acid phytosteryl, di (cholesteryl, octyldodecyl) N-lauroyl-L-glutamate and other moisturizers, calcium carbonate, zinc oxide and other powders Is mentioned. Furthermore, raw materials such as aloe extract, mugwort extract, chitosan, and silk powder can be used. Macadamian nut oil cholesteryl derivatives, macadamia nut oil fatty acid phytosteryl, di (cholesteryl, octyldodecyl) N-lauroyl-L-glutamate and other moisturizers, calcium carbonate, zinc oxide and other powders are heat resistant. In particular, it is suitable as an additive for resin films extruded at a high temperature of about 230 ° C., and powders such as zinc oxide and calcium carbonate are particularly excellent. As for the additive, kneading into the upper layer (skin side layer) of the resin film is sufficient, and kneading into the lower layer (absorber side layer) is not particularly required. The compounding amount of the additive to the top sheet is 0.1 to 10%, preferably 0.5 to 5%, and most preferably 1.0% with respect to the weight of the upper layer (skin side layer) of the film.
[0011]
Raw materials such as aloe extract, mugwort extract, chitosan, and silk powder are not suitable as additives for resin films to be extruded because of their low heat resistance. Can be used as an additive to be applied. However, when it is applied to the surface of the fiber by coating, there is a risk of peeling, and there is a problem in safety and sustainability of the effect, and the processing process may be complicated. Silicone materials such as silicone oil, silicone powder, and amide slip agent are mixed in the lower layer (absorber side) when the material moves from the upper layer (skin side layer) to the lower layer (absorber side layer). The effect of the agent is reduced, and water repellency due to silicon appears strongly to inhibit the downward movement (to the absorber) of the body fluid, so that it is unsuitable as an additive.
[0012]
【Example】
As a resin material for the skin side layer, an additive was blended with linear low density polyethylene blended with titanium oxide to obtain a resin material. As the resin raw material for the absorber side layer, an ethylene vinyl acetate copolymer, low density polyethylene, lipophilic glycerin monoolefin acid and sorbitan monolaurate were used. Each resin raw material was melted and a perforated film was produced by extrusion molding. As additives, macadamian nut oil fatty acid phytosteryl, zinc oxide, calcium carbonate, silicone oil, and silicon oil mixed with macadamian nut oil fatty acid phytosteryl were individually blended to produce sample films. Table 1 shows the blending ratio, liquid permeability and evaluation of each additive. The product to be compared is a perforated film having a two-layer structure in which no additive is blended. The evaluation was performed by measuring the surface friction resistance of the sample film when the artificial skin made of silicon rubber was placed on the sample film and when it was dried and moistened with simulated menstrual blood. A product having the same degree as that of the comparative product was evaluated as ○, and a product superior to this was evaluated as ◎. As is apparent from Table 1, sample films (1), (2), and (3) containing the additive of the present invention are excellent as a surface material for absorbent articles.
[0013]
[Table 1]
【The invention's effect】
According to this invention, the surface sheet positioned closest to the body fluid discharge side is added as an additive with a cosmetic raw material, particularly a material selected from skin care materials, to prevent the skin from being rubbed by the surface sheet, Since a surface sheet that is easy on the body can be provided, troubles on the skin of the wearer that occur when the body fluid absorbent article is worn can be reduced.
Claims (8)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US16403299P | 1999-11-05 | 1999-11-05 | |
| US60/164032 | 1999-11-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001137285A JP2001137285A (en) | 2001-05-22 |
| JP4312939B2 true JP4312939B2 (en) | 2009-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000271881A Expired - Fee Related JP4312939B2 (en) | 1999-11-05 | 2000-09-07 | Top sheet of body fluid absorbing article |
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| Country | Link |
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| JP (1) | JP4312939B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130171086A1 (en) * | 2011-12-29 | 2013-07-04 | The Dial Corporation | Antiperspirant compositions and methods for preparing antiperspirant compositions |
| MY194160A (en) * | 2014-06-10 | 2022-11-16 | Essity Hygiene & Health Ab | Absorbent product comprising a microbe-inhibiting composition |
| US11771603B2 (en) | 2019-09-02 | 2023-10-03 | The Procter & Gamble Company | Absorbent article |
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| JP4052744B2 (en) * | 1997-12-13 | 2008-02-27 | 株式会社コーセー | Water-in-oil emulsified cosmetic |
| JP3645699B2 (en) * | 1997-12-17 | 2005-05-11 | 花王株式会社 | O / W / O emulsion composition |
| JPH11228335A (en) * | 1998-02-20 | 1999-08-24 | Shiseido Co Ltd | Cosmetic for controlling sebum |
| JP4148558B2 (en) * | 1998-04-08 | 2008-09-10 | 信越化学工業株式会社 | Cleaning composition |
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2000
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