JPWO2011118409A1 - 吸水シート構成体 - Google Patents
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Classifications
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- A—HUMAN NECESSITIES
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- A61F13/532—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad
- A61F13/5323—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad having absorbent material located in discrete regions, e.g. pockets
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Abstract
Description
〔1〕 吸水性樹脂を含有してなる吸収層が、親水性不織布により該吸収層の上方及び下方から挟持された構造を有する吸水シート構成体であって、該吸水シート構成体の上面及び下面の少なくとも1面にエンボスが施され、以下の特性:
生理食塩水を、該吸水シート構成体1m2あたり4L(4L/m2)吸収させた際に、次の関係(A)及び(B)の両方を満たすこと(ただし、T1は生理食塩水吸収前の吸水シート構成体厚み(mm)、T2は生理食塩水吸収後の吸水シート構成体厚み(mm)、t2は生理食塩水吸収後の吸水シート構成体におけるエンボス厚み(mm)である)。
(A)膨張厚み比(T2/T1)が、2以上
(B)膨張エンボス深さ[(T2−t2)/T2]が、0.7以上
を有することを特徴とする吸水シート構成体;並びに
〔2〕 前記〔1〕に記載の吸水シート構成体を、液体透過性シート及び液体不透過性シートで狭持してなる、吸収性物品;に関するものである。
(b)親水性不織布の上に、吸水性樹脂と接着剤の混合粉末を均一に散布し、加熱炉を通過させて粉末が散逸しない程度に固定する。これに親水性不織布を重ねて、加熱圧着する。
(c)親水性不織布の上に、接着剤を溶融塗布した直後、吸水性樹脂を均一に散布して層を形成させ、さらに、上部から接着剤を溶融塗布した親水性不織布を、接着剤の塗布面が散布した吸水性樹脂層の側に向くように上部から重ね、ロールプレス等を用いて加圧して、要すれば加熱して、圧着する。
(d)親水性不織布の上に、吸水性樹脂を均一に散布し、さらに親水性不織布を重ねて、加熱エンボスを施すことにより、親水性不織布同士を加熱圧着する。
(A)膨張厚み比(T2/T1)が、2以上。
(B)膨張エンボス深さ[(T2−t2)/T2]が、0.7以上。
ポリエチレンフィルム(長さ150mm、幅25mm)に、50μmの厚みとなるように接着剤を均一に塗布して、試験片とした。ステンレス鋼板(長さ125mm、幅50mm)の一端に、試験片の長さ25mm×幅25mmの面積が接するように、貼り付け、貼り付いていない部分は、接着面を内側にして折り重ねた。試験片の上から、2kgのゴムローラーを用いて、5mm/秒の速度で1往復し圧着した。
得られた吸水シート構成体をそのまま、サンプルとした(10cm×30cm)。なお、得られた吸水シート構成体が10cm×30cmの形状になっていない場合は、10cm×30cmの短冊状で、長手方向が不織布の縦方向(機械方向)となるように切断したものを、サンプルとして使用した。
吸水シート構成体を、5cm×5cmに切断したものをサンプルとして使用した。
得られたサンプルについて、レーザ変位センサ(株式会社キーエンス製、型番:LBシリーズ)を用いて、エンボスが施されていない平面の厚みを測定した。厚みの測定は、測定箇所を変えて5回行い、その平均値を生理食塩水吸収前の厚みT1(mm)とした(例えば、図1参照)。
(A)膨張厚み比=T2/T1
(B)膨張エンボス深さ=(T2−t2)/T2
吸水シート構成体を10cm×30cmの短冊状で、長手方向が親水性不織布の縦方向(機械方向)となるように切断したものを、サンプルとして使用した。
液体逆戻り量(g)=Wb−Wa
傾斜における漏れ試験は、図8に示す装置を用いて行った。
概略としては、市販の実験設備用の架台51を用いて、アクリル板52を傾斜させて固定した後、板上に載置した吸収性物品53に鉛直上方から滴下ロート54で前記の試験液を投入し、漏れ量を天秤55で計量する機構である。以下に詳細な仕様を示す。
漏れ指数:L=LW1×10+LW2×5+LW3
前記の傾斜における漏れ試験実施後の吸水シート構成体の状態変化を、目にて確認して、以下の基準で評価した。
A:吸収層に変化なく、型崩れしていない。
B:一部、吸水性樹脂の移動等吸収層に変化があり、多少型崩れしている。
C:かなり型崩れをしている。
加熱温度を150℃に設定したホットメルト塗工機(株式会社ハリーズ製:マーシャル150)上に、親水性不織布として幅30cmのポリプロピレン製スパンボンド−メルトブローン−スパンボンド(以下、SMSと表記)不織布を親水化剤により親水化処理したもの(目付量:13g/m2、厚さ:150μm、ポリプロピレン含有率:100%)を敷いた後、接着剤としてスチレン−ブタジエン−スチレン共重合体(SBS−1;軟化点85℃、保持力1440分間以上)を目付量14g/m2で当該不織布上に塗布した。
エンボス面積率を7%から13%に変更し、かつ図6に示すエンボス形状を施した以外は、実施例1と同様の方法によって、吸水シート構成体を得た。
加熱温度を150℃に設定したホットメルト塗工機(株式会社ハリーズ製:マーシャル150)上に、親水性不織布として幅30cmのスパンレース親水性不織布(目付量:50g/m2、厚さ:400μm、レーヨン含有率:70%、ポリエチレンテレフタレート含有率:30%)を敷いた後、接着剤としてスチレン−ブタジエン−スチレン共重合体(SBS−1;軟化点85℃、保持力1440分間以上)を目付量20g/m2で当該不織布上に塗布した。
実施例3において得られたエンボスを施す前の吸水シート構成体の中間物A−1を、10cm×30cmの短冊状で、長手方向が不織布の縦方向(機械方向)となるように切断した後、前記吸水シート構成体の中間物A−1(片面)上に、加熱エンボスロールにて、エンボス面積率が7%、かつ図7で表されるエンボス形状が形成されるようにエンボスを施し、吸水シート構成体の中間物A−1eを得た。
加熱温度を150℃に設定したホットメルト塗工機(株式会社ハリーズ製:マーシャル150)上に、親水性不織布として幅30cmのスパンレース親水性不織布(目付量:50g/m2、厚さ:400μm、レーヨン含有率:70%、ポリエチレンテレフタレート含有率:30%)を敷いた後、接着剤としてスチレン−ブタジエン−スチレン共重合体(SBS−1;軟化点85℃、保持力1440分間以上)を目付量30g/m2で当該不織布上に塗布した。
積層シート構成体にエンボスを施さない以外は、実施例1と同様の方法によって、吸水シート構成体を得た。
接着剤を、スチレン−ブタジエン−スチレン共重合体(SBS−1;軟化点85℃、保持力1440分間以上)から、スチレン−イソプレン−スチレン共重合体(SBS−2;軟化点82℃、保持力850分間)に変更した以外は、実施例1と同様の方法によって、吸水シート構成体を得た。
エンボス面積率を7%から35%に変更し、かつ図6に示すエンボス形状を施した以外は、実施例1と同様の方法によって、吸水シート構成体を得た。
加熱温度を150℃に設定したホットメルト塗工機(株式会社ハリーズ製:マーシャル150)上に、親水性不織布として幅30cmのスパンレース親水性不織布(目付量:50g/m2、厚さ:400μm、レーヨン含有率:70%、ポリエチレンテレフタレート含有率:30%)を敷いた後、接着剤としてスチレン−ブタジエン−スチレン共重合体(SBS−1;軟化点85℃、保持力1440分間以上)を目付量16g/m2で当該不織布上に塗布した。
T2:生理食塩水吸収後の吸水シート構成体厚み(mm)
t2:生理食塩水吸収後の吸水シート構成体におけるエンボス厚み(mm)
2 吸収層
3 エンボス
4 親水性不織布
51 架台
52 アクリル板
53 吸収性物品
54 滴下ロート
55 天秤
56 トレイ
Claims (4)
- 吸水性樹脂を含有してなる吸収層が、親水性不織布により該吸収層の上方及び下方から挟持された構造を有する吸水シート構成体であって、該吸水シート構成体の上面及び下面の少なくとも1面にエンボスが施され、以下の特性:
生理食塩水を、該吸水シート構成体1m2あたり4L(4L/m2)吸収させた際に、次の関係(A)及び(B)の両方を満たすこと。ただし、T1は生理食塩水吸収前の吸水シート構成体厚み(mm)、T2は生理食塩水吸収後の吸水シート構成体厚み(mm)、t2は生理食塩水吸収後の吸水シート構成体におけるエンボス厚み(mm)である。
(A)膨張厚み比(T2/T1)が、2以上
(B)膨張エンボス深さ[(T2−t2)/T2]が、0.7以上
を有することを特徴とする吸水シート構成体。 - 前記吸水シート構成体に施されたエンボスの面積率が、該吸水シート構成体のエンボスが施された面の面積の3〜25%である請求項1に記載の吸水シート構成体。
- 前記吸水シート構成体の乾燥状態の厚みが、4mm以下である請求項1又は2に記載の吸水シート構成体。
- 請求項1〜3のいずれか1項に記載の吸水シート構成体を、液体透過性シート及び液体不透過性シートで狭持してなる、吸収性物品。
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US10188563B2 (en) * | 2013-03-15 | 2019-01-29 | Dsg Technology Holdings Ltd. | Absorbent articles with pulpless riffled core |
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AU2011309126B2 (en) | 2010-09-28 | 2015-05-07 | Sumitomo Seika Chemicals Co., Ltd. | Water-absorbent sheet structure |
JP5967796B2 (ja) * | 2011-12-02 | 2016-08-10 | 日本製紙クレシア株式会社 | 吸収性物品 |
US10265226B2 (en) | 2012-09-10 | 2019-04-23 | Sumitomo Seika Chemicals Co., Ltd. | Water-absorbent resin, water-absorbent material, and water-absorbent article |
US9789014B2 (en) | 2013-03-15 | 2017-10-17 | Dsg Technology Holdings Ltd. | Method of making an absorbent composite and absorbent articles employing the same |
US9566198B2 (en) | 2013-03-15 | 2017-02-14 | Dsg Technology Holdings Ltd. | Method of making an absorbent composite and absorbent articles employing the same |
MY181416A (en) | 2013-07-03 | 2020-12-21 | Dsg Technology Holdings Ltd | An absorbent composite, an absorbent article employing the same, and methods, systems, and apparatus for making the absorbent composite and/or article |
JP6365406B2 (ja) * | 2015-05-15 | 2018-08-01 | 王子ホールディングス株式会社 | 吸収性物品 |
JP6793456B2 (ja) * | 2016-03-01 | 2020-12-02 | ダイニック株式会社 | 吸水蒸散板 |
US20200023625A1 (en) | 2017-02-22 | 2020-01-23 | Nippon Shokubai Co., Ltd. | Water absorbent sheet, elongated water absorbent sheet, and absorbent article |
JP7001471B2 (ja) * | 2017-12-29 | 2022-01-19 | 花王株式会社 | 吸収体及び吸収性物品 |
US20210038439A1 (en) | 2018-04-13 | 2021-02-11 | Nippon Shokubai Co., Ltd. | Water absorbent sheet, water absorbent sheet production method, and absorbent article |
CN112566602B (zh) | 2018-08-09 | 2023-06-16 | 株式会社日本触媒 | 吸水性片和包含其的吸收性物品 |
CN114746058A (zh) * | 2019-11-28 | 2022-07-12 | 株式会社日本触媒 | 吸水性片和包含其的吸收性物品 |
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JP2554136B2 (ja) * | 1988-08-19 | 1996-11-13 | 株式会社日本触媒 | 吸水性複合体およびその製造方法 |
US5143968A (en) * | 1989-08-11 | 1992-09-01 | The Dow Chemical Company | Polystyrene-polyisoprene-polystyrene block copolymers, hot melt adhesive compositions, and articles produced therefrom |
JPH05300922A (ja) | 1992-04-23 | 1993-11-16 | Chikazawa Seishijiyo:Kk | 紙おむつ |
JP3499375B2 (ja) * | 1996-07-02 | 2004-02-23 | ユニ・チャーム株式会社 | 吸収シートおよびその製造方法 |
US6660903B1 (en) * | 1999-10-01 | 2003-12-09 | Kimberly-Clark Worldwide, Inc. | Center-fill absorbent article with a central rising member |
JP4583106B2 (ja) * | 2004-08-12 | 2010-11-17 | ユニ・チャーム株式会社 | 陰唇間パッド |
CN102088944A (zh) * | 2008-07-11 | 2011-06-08 | 住友精化株式会社 | 吸水片组合物 |
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US10188563B2 (en) * | 2013-03-15 | 2019-01-29 | Dsg Technology Holdings Ltd. | Absorbent articles with pulpless riffled core |
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KR20130029059A (ko) | 2013-03-21 |
CA2793411A1 (en) | 2011-09-29 |
KR101718579B1 (ko) | 2017-03-21 |
WO2011118409A1 (ja) | 2011-09-29 |
AU2011230827B2 (en) | 2015-12-10 |
SG184205A1 (en) | 2012-10-30 |
US20130018349A1 (en) | 2013-01-17 |
AU2011230827A1 (en) | 2012-10-25 |
TWI503111B (zh) | 2015-10-11 |
JP5727999B2 (ja) | 2015-06-03 |
TW201143738A (en) | 2011-12-16 |
CA2793411C (en) | 2017-05-09 |
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