JP6404393B1 - 吸収性物品 - Google Patents
吸収性物品 Download PDFInfo
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- JP6404393B1 JP6404393B1 JP2017067158A JP2017067158A JP6404393B1 JP 6404393 B1 JP6404393 B1 JP 6404393B1 JP 2017067158 A JP2017067158 A JP 2017067158A JP 2017067158 A JP2017067158 A JP 2017067158A JP 6404393 B1 JP6404393 B1 JP 6404393B1
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Abstract
Description
前記吸収体は、肌側に配置された上層シートと非肌側に配置された下層シートとの間に、高吸水性ポリマーが配置されたポリマーシートからなり、前記ポリマーシートは、前記上層シートと前記下層シートとの間に中間シートが配設され、前記上層シート、下層シート及び中間シートの隣り合うシート間のうち、少なくとも1つのシート間に、前記高吸水性ポリマーが配置されて成り、前記下層シートは、下記の第1の吸水試験方法により測定した拡散面積が1500mm2以上であり、
前記吸収体は、下記の第2の吸水試験方法により測定した2回目の吸水速度が42秒以下であり、
前記中間シートの下記の第1の試験方法により測定した拡散面積が、前記下層シートの下記の第1の試験方法により測定した拡散面積と比較して、同等か小さくなされていることを特徴とする吸収性物品が提供される。
(第1の吸水試験方法)
(1)100×100mmの試験片を用意する。
(2)試験片の表面から高さ10mmの位置にビュレットの先端を配置し、前記ビュレットからイオン交換水を1滴滴下する。
(3)水滴が試験片の表面に達したときから3分経過後に、試験片表面から水の反射が明らかに見える範囲の面積を拡散面積として測定する。
(第2の吸水試験方法)
(1)表面に人工経血1ccを注入してから3分経過後、同じ位置に人工経血1ccを注入する。
(2)2回目の人工経血を注入してから全ての人工経血が吸収されるまでの時間を吸水速度として測定する。
(生理用ナプキン1の基本構成)
本発明に係る生理用ナプキン1は、図1及び図2に示されるように、ポリエチレンシートなどからなる不透液性裏面シート2と、尿などを速やかに透過させる透液性表面シート3と、これら両シート2、3間に介装され、肌側に配置された上層シート10と非肌側に配置された下層シート11との間の所定領域に高吸水性ポリマー12が配置されたポリマーシート4と、前記ポリマーシート4の略側縁部を起立基端とし、かつ少なくとも体液排出部位Hを含むように長手方向に所定の区間内において肌側に突出して設けられた左右一対の立体ギャザーBS、BSを形成するサイド不織布7、7とから主に構成され、かつ前記ポリマーシート4の周囲においては、その長手方向端縁部では前記不透液性裏面シート2と透液性表面シート3との外縁部がホットメルトなどの接着剤やヒートシール等の接着手段によって接合され、またその両側縁部ではポリマーシート4よりも側方に延出している前記不透液性裏面シート2と前記サイド不織布7とがホットメルトなどの接着剤やヒートシール等の接着手段によって接合されている。必要に応じて、前記透液性表面シート3とポリマーシート4との間に親水性のセカンドシート(図示せず)を配置してもよい。
前記不透液性裏面シート2は、ポリエチレン、ポリプロピレン等の少なくとも遮水性を有するシート材が用いられるが、この他に防水フィルムを介在して実質的に不透液性を確保した上で不織布シート(この場合には、防水フィルムと不織布とで不透液性裏面シートを構成する。)などを用いることができる。近年はムレ防止の観点から透湿性を有するものが好適に用いられる傾向にある。この遮水・透湿性シート材としては、ポリエチレンやポリプロピレン等のオレフィン系樹脂中に無機充填剤を溶融混練してシートを成形した後、一軸または二軸方向に延伸することにより得られる微多孔性シートが好適に用いられる。
以下、前記ポリマーシート4について詳細に説明する。前記不透液性裏面シート2と透液性表面シート3との間に介在されるポリマーシート4は、図3に示されるように、肌側(透液性表面シート3側)に配置された上層シート10と、非肌側(不透液性裏面シート2側)に配置された下層シート11との間に、高吸水性ポリマー12が配置された構造を成している。前記高吸水性ポリマー12は、上層シート10と下層シート11との間において、パルプなどの繊維状材料に分散された状態で配置されるのではなく、粉粒状の高吸水性ポリマー12の集合体として単体で配置されている。これにより、前記ポリマーシート4の厚みが薄くなり、生理用ナプキン1の薄型化を図ることが可能となる。
(1)100×100mmの試験片を用意する。
(2)試験片の表面から高さ10mmの位置にビュレットの先端を配置し、前記ビュレットからイオン交換水を1滴滴下する。
(3)水滴が試験片の表面に達したときから3分経過後に、試験片表面から水の反射が明らかに見える範囲の面積を拡散面積として測定する。拡散面積の測定は、試験片の表面を画像データとしてコンピュータに取り込み、拡散範囲の輪郭を指定して、囲まれた範囲の面積を画像解析ソフトを用いて解析する。
(1)前記上層シート10の表面に20g/m2のエアスルー不織布を積層した試験体の表面に、人工経血1ccを注入してから3分経過後、同じ位置に人工経血1ccを注入する。前記人工経血は、グリセリン12.30重量%、イオン交換水85.18重量%、CMC(カルボキシメチルセルロースナトリウム)0.45重量%、NaCl(塩化ナトリウム)0.97重量%、Na2CO3(炭酸ナトリウム)1.04重量%、青粉0.06重量%の組成からなり、粘度8mPa・s、37℃に調製したものである。
(2)2回目の人工経血を注入してから全ての人工経血が吸収されるまでの時間をストップウォッチで測定し、2回目の吸水速度とする。
上記第1形態例では、吸収体としてポリマーシート4を用いたが、本参考的形態例では、図9に示されるように、吸収体として、パルプに高吸水性ポリマー12が混入された吸収体本体20の非肌側に、上記の吸水試験方法により測定した拡散面積が1500mm2以上である不織布21が積層されたものを用いている。
実施例1:上述の拡散面積が1500mm2以上であるSMS不織布(ゴールデンフェニックス社製の超親水SMS不織布)。目付30g/m2。
比較例1:クレープ紙。目付13.5g/m2。
比較例2:親水剤を表面に塗布した親水性のSMS不織布。目付17g/m2。
比較例3:綿繊維100重量%からなる不織布。目付33g/m2。
比較例4:ポリエチレン、ポリエチレンテレフタレートのエアスルー不織布。目付20g/m2。
比較例5:親水処理を施していない疎水性のSMS不織布。目付17g/m2。
Claims (4)
- 少なくとも吸収体を備えた吸収性物品において、
前記吸収体は、肌側に配置された上層シートと非肌側に配置された下層シートとの間に、高吸水性ポリマーが配置されたポリマーシートからなり、前記ポリマーシートは、前記上層シートと前記下層シートとの間に中間シートが配設され、前記上層シート、下層シート及び中間シートの隣り合うシート間のうち、少なくとも1つのシート間に、前記高吸水性ポリマーが配置されて成り、前記下層シートは、下記の第1の吸水試験方法により測定した拡散面積が1500mm2以上であり、
前記吸収体は、下記の第2の吸水試験方法により測定した2回目の吸水速度が42秒以下であり、
前記中間シートの下記の第1の試験方法により測定した拡散面積が、前記下層シートの下記の第1の試験方法により測定した拡散面積と比較して、同等か小さくなされていることを特徴とする吸収性物品。
(第1の吸水試験方法)
(1)100×100mmの試験片を用意する。
(2)試験片の表面から高さ10mmの位置にビュレットの先端を配置し、前記ビュレットからイオン交換水を1滴滴下する。
(3)水滴が試験片の表面に達したときから3分経過後に、試験片表面から水の反射が明らかに見える範囲の面積を拡散面積として測定する。
(第2の吸水試験方法)
(1)表面に人工経血1ccを注入してから3分経過後、同じ位置に人工経血1ccを注入する。
(2)2回目の人工経血を注入してから全ての人工経血が吸収されるまでの時間を吸水速度として測定する。 - 前記下層シートは、スパンボンド層、メルトブローン層、スパンボンド層が順に積層された不織布に、親水剤が含有されて成る請求項1記載の吸収性物品。
- 前記上層シートは、化学繊維を含有するエアスルー不織布からなる請求項1、2いずれかに記載の吸収性物品。
- 前記中間シートは、上記の第1の吸水試験方法により測定した拡散面積が1500mm2以上である請求項1〜3いずれかに記載の吸収性物品。
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EP18775724.0A EP3603592B1 (en) | 2017-03-30 | 2018-03-16 | Absorbent article |
CN201880020217.5A CN110446479A (zh) | 2017-03-30 | 2018-03-16 | 吸收性物品 |
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MX9200798A (es) * | 1991-02-26 | 1992-08-01 | Weyerhaeuser Co | Producto absorbente. |
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US20030234468A1 (en) * | 1997-01-17 | 2003-12-25 | Krishnakumar Rangachari | Soft, absorbent material for use in absorbent articles and process for making the material |
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US20120203191A1 (en) * | 2009-10-09 | 2012-08-09 | Sumitomo Seika Chemicals Co., Ltd. | Water-absorbent sheet |
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US20120136329A1 (en) * | 2010-11-30 | 2012-05-31 | Sca Hygiene Products Ab | Absorbent article with an acquisition distribution layer with channels |
JP6053694B2 (ja) * | 2011-12-27 | 2016-12-27 | 住友精化株式会社 | 吸水シート構成体 |
JP5839685B2 (ja) * | 2012-01-19 | 2016-01-06 | ユニ・チャーム株式会社 | 使い捨て吸収性物品 |
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US9572729B2 (en) * | 2013-09-30 | 2017-02-21 | Kimberly-Clark Worldwide, Inc. | Method of forming an absorbent structure |
JP6411066B2 (ja) * | 2014-05-12 | 2018-10-24 | ユニ・チャーム株式会社 | 吸収体用の不織布シートを含む吸収性物品、及び当該吸収性物品に用いられる不織布シートの製造方法 |
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