JP5868110B2 - 吸収性物品 - Google Patents
吸収性物品 Download PDFInfo
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- JP5868110B2 JP5868110B2 JP2011226510A JP2011226510A JP5868110B2 JP 5868110 B2 JP5868110 B2 JP 5868110B2 JP 2011226510 A JP2011226510 A JP 2011226510A JP 2011226510 A JP2011226510 A JP 2011226510A JP 5868110 B2 JP5868110 B2 JP 5868110B2
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- JP
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- Prior art keywords
- core wrap
- wrap sheet
- sheet
- absorbent
- nonwoven fabric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000002745 absorbent Effects 0.000 title claims description 196
- 239000002250 absorbent Substances 0.000 title claims description 196
- 239000004745 nonwoven fabric Substances 0.000 claims description 72
- 239000000835 fiber Substances 0.000 claims description 64
- 229920000642 polymer Polymers 0.000 claims description 31
- 239000006096 absorbing agent Substances 0.000 claims description 29
- 239000004750 melt-blown nonwoven Substances 0.000 claims description 28
- 239000004744 fabric Substances 0.000 claims description 23
- 239000007788 liquid Substances 0.000 description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 35
- 229920003043 Cellulose fiber Polymers 0.000 description 21
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- 229920002994 synthetic fiber Polymers 0.000 description 10
- 239000012209 synthetic fiber Substances 0.000 description 10
- 238000010521 absorption reaction Methods 0.000 description 9
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 9
- -1 polyethylene terephthalate Polymers 0.000 description 9
- 239000000463 material Substances 0.000 description 8
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- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 239000004627 regenerated cellulose Substances 0.000 description 3
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- 229920000742 Cotton Polymers 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
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- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
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- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
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- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 1
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- 239000002781 deodorant agent Substances 0.000 description 1
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- RPOCFUQMSVZQLH-UHFFFAOYSA-N furan-2,5-dione;2-methylprop-1-ene Chemical compound CC(C)=C.O=C1OC(=O)C=C1 RPOCFUQMSVZQLH-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229920000578 graft copolymer Polymers 0.000 description 1
- 238000007756 gravure coating Methods 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
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Description
先ず、製品(おむつ)を洗浄溶剤(酢酸ブチルとヘキサンの混合溶剤)に浸して、製品中に含まれている接着剤を溶かし、製品を各構成部材に丁寧に分解する。各構成部材を伸張させないように洗浄溶剤から取り出し、室温で乾燥させる。次いで、乾燥したコアラップシートに、50mm四方の正方形形状のアクリル板(重量14.8g)を載せることでコアラップシートに5.9Paの荷重をかけ、その状態でレーザー式厚み計によりコアラップシートの厚みを測定する。
図8に示すように、測定対象のシート90を、上下からゴムパッキン92,92を介して、直径35mmの一対のガラス製シリンダー93,94で挟持固定した状態下に、上側のシリンダー93にイオン交換水40gを供給する。イオン交換水の供給開始時から、シート90を通過して下側のシリンダー94に溜まったイオン交換水の重量が20gになるまでの時間を測定し、この時間を水通過時間とする。イオン交換水の重量は、液受け皿95を備えた電子天秤96によって測定する。
前記吸収体は、吸水性ポリマーを含み且つ親水性繊維を実質的に含まない吸収性コアと、該吸収性コアの肌対向面を被覆する上側コアラップシートと、該吸収性コアの非肌対向面を被覆する下側コアラップシートとを含んで構成されており、
前記上側コアラップシートは、前記下側コアラップシートよりも厚みの大きい肉厚領域を有している吸収性物品。
[3]前記吸収性コアが前記親水性繊維を全く含んでいない[1]記載の吸収性物品。
[4]前記親水性繊維は、セルロース繊維及び親水化処理された合成繊維からなる群から選択される1種以上である[1]〜[3]の何れか一項に記載の吸収性物品。
[5]前記セルロース繊維は、天然セルロース繊維及び再生セルロース繊維からなる群から選択される1種以上である[4]記載の吸収性物品。
[6]前記天然セルロース繊維は、木材パルプ及び非木材パルプからなる群から選択される1種以上である[5]記載の吸収性物品。
[7]前記木材パルプは、針葉樹クラフトパルプ及び広葉樹クラフトパルプからなる群から選択される1種以上である[6]記載の吸収性物品。
[8]前記非木材パルプは、木綿パルプ及びワラパルプからなる群から選択される1種以上である[6]又は[7]記載の吸収性物品。
[9]前記再生セルロース繊維は、レーヨン及びキュプラからなる群から選択される1種以上である[5]〜[8]の何れか一項に記載の吸収性物品。
[10]前記合成繊維は、親水性合成繊維、ポリエチレンテレフタレート繊維、ポリエチレン繊維、ポリプロピレン繊維及びポリエステル繊維からなる群から選択される1種以上である[4]〜[9]の何れか一項に記載の吸収性物品。
[11]前記親水性合成繊維は、ポリビニルアルコール繊維及びポリアクリロニトリル繊維からなる群から選択される1種以上である[10]記載の吸収性物品。
[13]前記吸収性コアの坪量は150〜300g/m2である[12]記載の吸収性物品。
[14]前記上側コアラップシートの前記肉厚領域の厚みt1と前記下側コアラップシートの厚みt2との比(t1/t2)は1.5〜20である[1]〜[13]の何れか一項に記載の吸収性物品。
[15]前記上側コアラップシートの前記肉厚領域の厚みt1と前記下側コアラップシートの厚みt2との比(t1/t2)は2〜10である[14]記載の吸収性物品。
[16]前記上側コアラップシートの坪量は13〜30g/m2である[1]〜[15]の何れか一項に記載の吸収性物品。
[17]前記上側コアラップシートの坪量は15〜20g/m2である[16]記載の吸収性物品。
[18]前記下側コアラップシートの坪量は7〜30g/m2である[1]〜[17]の何れか一項に記載の吸収性物品。
[19]前記下側コアラップシートの坪量は10〜15g/m2である[18]記載の吸収性物品。
[21]前記上側コアラップシート及び前記下側コアラップシートは、それぞれ、繊維を主体とするシートである[1]〜[20]の何れか一項に記載の吸収性物品。
[22]前記上側コアラップシート及び前記下側コアラップシートは、それぞれ、繊維の含有量が90質量%以上のシートである[21]記載の吸収性物品。
[23]前記上側コアラップシート及び前記下側コアラップシートは、それぞれ、紙及び不織布からなる群から選択される1種である[21]又は[22]記載の吸収性物品。
[24]前記上側コアラップシート及び前記下側コアラップシートは、それぞれ、紙及び不織布からなる群から選択される2種以上が積層された複合シートである[21]又は[22]記載の吸収性物品。
[25]前記紙はクレープ紙である[23]又は[24]記載の吸収性物品。
[26]前記不織布は、スパンボンド不織布、メルトブローン不織布、サーマルボンド不織布、ニードルパンチ不織布、スパンレース不織布及びエアレイド不織布からなる群から選択される1種以上である[23]〜[25]の何れか一項に記載の吸収性物品。
前記上側コアラップシートにおいては、前記スパンボンド不織布層の方が前記メルトブローン不織布層よりも坪量が大きく、前記下側コアラップシートにおいては、前記メルトブローン不織布層の方が前記スパンボンド不織布層よりも坪量が大きい[1]〜[20]の何れか一項に記載の吸収性物品。
[28]前記積層体における隣接する不織布層どうしは、接着剤によって互いに貼り合わされて一体化しているのではなく、各不織布層の構成繊維どうしの絡み合い及び/又は熱融着によって一体化している[27]記載の吸収性物品。
[29]前記スパンボンド不織布層はスパンボンド不織布からなり、該スパンボンド不織布は、合成樹脂を熱溶融してノズルより紡出し、生成した多数本のフィラメントをコンベア上に集積させてウエブとし、そのウエブに、熱圧着処理又は機械的交絡処理を施して各フィラメントどうしを接着させることにより得られたものである[27]又は[28]記載の吸収性物品。
[30]前記メルトブローン不織布層はメルトブローン不織布からなり、該メルトブローン不織布は、融解した合成樹脂を、押し出し機のダイチップからコンベア上に高速の気流で吹き出して、自己接着性ファイバーウエブを形成することにより得られたものである[27]〜[29]の何れか一項に記載の吸収性物品。
[31]前記積層体は、2層の前記スパンボンド不織布層の間に1層の前記メルトブローン不織布層が配置された状態で一体化された不織布である[27]〜[30]の何れか一項に記載の吸収性物品。
[32]前記積層体は、2層の前記スパンボンド不織布層の間に2層の前記メルトブローン不織布層が配置された状態で一体化された不織布である[27]〜[30]の何れか一項に記載の吸収性物品。
[34]前記下側コアラップシートは、疎水性を有している[1]〜[33]の何れか一項に記載の吸収性物品。
[35]使い捨ておむつとして用いられる[1]〜[34]の何れか一項に記載の吸収性物品。
[36]ファスニングテープを有する展開型の使い捨ておむつとして用いられる[1]〜[34]の何れか一項に記載の吸収性物品。
サブレイヤーシートを含んでいない点以外は、図1及び図2に記載のおむつ1と同様の基本構成を有する展開型の使い捨ておむつを作製し、これを実施例1のサンプルとした。表面シートとしては、PET、PP及びPEを構成繊維とする坪量25g/m2のエアスルー不織布を用い、裏面シートとしては、坪量20g/m2のPE製樹脂フィルムを用いた。吸収性コアは、吸水性ポリマー(SAP、サンダイヤポリマー製、IM930)を用いて(繊維を用いずに)構成し、該吸収性コアの坪量(吸水性ポリマーの散布量)を75g/m2とした。上側コアラップシートとして、厚み0.2mm(坪量15g/m2)、水通過時間1秒の親水性のSMMS不織布〔各層の坪量比(S:M:M:S)=6.5:1:1:6.5〕を用い、下側コアラップシートとして、厚み0.1mm(坪量10g/m2)、水通過時間1秒の親水性のSMMS不織布〔各層の坪量比(S:M:M:S)=4:1:1:4)〕を用いた。吸収体は、下側コアラップシートの一面に、吸水性ポリマーと接着剤との混合物を散布し、その散布面に、予め一面に接着剤が塗布された上側コアラップシートの該一面を重ね合わせることにより作製した。吸収体の長手方向の全長は380mm、幅方向の全長(最大長さ)は120mm、無荷重下での厚みは1.3mmであった。
下側コアラップシートとして、厚み0.1mm(坪量10g/m2)、水通過時間63秒の疎水性のSMMS不織布〔各層の坪量比(S:M:M:S)=4:1:1:4)〕を用いた以外は、実施例1と同様にして展開型の使い捨ておむつを作製し、実施例2のサンプルとした。
上側コアラップシートと下側コアラップシートとで厚み(坪量)を同じにした以外は、実施例1と同様にして展開型の使い捨ておむつを作製し、比較例1及び2のサンプルとした。
表面シートと吸収体との間に、サブレイヤーシートとして、厚み0.1mm(坪量10g/m2)の親水性のSMMS不織布〔各層の坪量比(S:M:M:S)=4:1:1:4〕を配置した以外は、比較例1と同様にして展開型の使い捨ておむつを作製し、比較例3のサンプルとした。サブレイヤーシートは、吸収体上の腹側寄りに配置した。
上側コアラップシートと下側コアラップシートとで厚み(坪量)を逆にした以外は、実施例1と同様にして展開型の使い捨ておむつを作製し、比較例4のサンプルとした。
吸収性コアとして、吸水性ポリマー(SAP)と共に親水性繊維(セルロース繊維)を実質的に含む吸収性コア(SAP75g/m2の上にフラップパルプ(NBKP)ウエブ50g/m2を重ねたもの)を用いた以外は、実施例1と同様にして展開型の使い捨ておむつを作製し、比較例5のサンプルとした。
実施例及び比較例の各サンプル(使い捨ておむつ)について、下記方法により液戻り量を測定した。その結果を下記表1に示す。液戻り量の多少は、使い捨ておむつの吸収性能、特に、肌対向面(表面シート)のドライ感と密接に関係し、液戻り量が少ないほど、使い捨ておむつの吸収性能が高く、ドライ感に優れ、高評価となる。
測定対象の使い捨ておむつを平面状に拡げ、肌対向面(表面シート)を上に向けて水平面上に固定した状態で、吸収体の中心部における該表面シート上に、円筒状の注入部の付いたアクリル板をのせる。アクリル板に設けられた注入部は、内径20mmの円筒状をなし、アクリル板には、長手方向及び幅方向の中心軸に、該円筒状注入部の中心軸線が一致し、該円筒状注入部の内部とアクリル板の表面シート対向面との間を連通する内径10mmの貫通孔が形成されている。次いで、円筒状注入部の中心軸が吸収体の平面視における中心部と一致するようにアクリル板を配置し、30gの人工尿を、円筒状注入部から注入し、使い捨ておむつに吸収させる。人工尿注入後アクリル板を取り除き、注入時から1分後に、使い捨ておむつの肌当接面上(表面シート上)に、10cm四方の濾紙(ADVANTEC社製の硬質濾紙4A)を20枚重ねたものを注入箇所に載せ、荷重0.7kPa又は0.1kPa未満で30秒間おむつの加圧を行った。こうして、加圧によって液戻りした人工尿を濾紙に吸収させた。吸収によって増加した濾紙の重量を測定し、吸収前の濾紙の重量との差を液戻り量とした。
2 表面シート
3 裏面シート
4,4A,4B,4C,4D,4E,4F 吸収体
40 吸収性コア
45 上側コアラップシート
46 下側コアラップシート
5 サブレイヤーシート
P,P1,P2 凹凸領域
Claims (8)
- 肌対向面を形成する表面シート、非肌対向面を形成する裏面シート、及び両シート間に配置された吸収体を具備する吸収性物品であって、
前記吸収体は、吸水性ポリマーを含み且つ親水性繊維を実質的に含まない吸収性コアと、該吸収性コアの肌対向面を被覆する上側コアラップシートと、該吸収性コアの非肌対向面を被覆する下側コアラップシートとを含んで構成されており、
前記上側コアラップシートは、前記下側コアラップシートよりも厚みの大きい肉厚領域を有しており、
前記上側コアラップシート及び前記下側コアラップシートは、それぞれ、1層以上のスパンボンド不織布層と1層以上のメルトブローン不織布層との積層体からなり、
前記上側コアラップシートにおいては、前記スパンボンド不織布層の方が前記メルトブローン不織布層よりも坪量が大きく、前記下側コアラップシートにおいては、前記メルトブローン不織布層の方が前記スパンボンド不織布層よりも坪量が大きい吸収性物品。 - 前記上側コアラップシートは、凹凸形状が形成されている凹凸領域を有している請求項1記載の吸収性物品。
- 前記上側コアラップシートの方が前記下側コアラップシートよりも親水度が高い請求項1又は2記載の吸収性物品。
- 前記下側コアラップシートは、疎水性を有している請求項1〜3の何れか一項に記載の吸収性物品。
- 前記吸収性コアの前記親水性繊維の含有量が5質量%以下である請求項1〜4の何れか一項に記載の吸収性物品。
- 前記吸収性コアが前記親水性繊維を全く含んでいない請求項1〜5の何れか一項に記載の吸収性物品。
- 前記上側コアラップシートの前記肉厚領域の厚みは、前記下側コアラップシートの厚みの2倍以上である請求項1〜6の何れか一項に記載の吸収性物品。
- 使い捨ておむつとして用いられる請求項1〜7の何れか一項に記載の吸収性物品。
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US13/824,810 US20130211358A1 (en) | 2010-10-18 | 2011-10-17 | Absorbent article |
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2011
- 2011-10-14 JP JP2011226510A patent/JP5868110B2/ja active Active
- 2011-10-17 WO PCT/JP2011/073841 patent/WO2012053482A1/ja active Application Filing
- 2011-10-17 US US13/824,810 patent/US20130211358A1/en not_active Abandoned
- 2011-10-17 EP EP11834321.9A patent/EP2630939B1/en active Active
- 2011-10-17 CN CN201180050329.3A patent/CN103167855B/zh active Active
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CN103167855B (zh) | 2015-09-16 |
WO2012053482A1 (ja) | 2012-04-26 |
EP2630939B1 (en) | 2020-05-13 |
EP2630939A1 (en) | 2013-08-28 |
JP2012105962A (ja) | 2012-06-07 |
US20130211358A1 (en) | 2013-08-15 |
CN103167855A (zh) | 2013-06-19 |
EP2630939A4 (en) | 2014-08-27 |
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