JP6033236B2 - 吸水シート構成体 - Google Patents
吸水シート構成体 Download PDFInfo
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- JP6033236B2 JP6033236B2 JP2013551605A JP2013551605A JP6033236B2 JP 6033236 B2 JP6033236 B2 JP 6033236B2 JP 2013551605 A JP2013551605 A JP 2013551605A JP 2013551605 A JP2013551605 A JP 2013551605A JP 6033236 B2 JP6033236 B2 JP 6033236B2
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- water
- nonwoven fabric
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- absorbent
- adhesive
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Images
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Landscapes
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Description
〔1〕 吸水性樹脂及び接着剤を含有してなる吸収層が、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、
(1) 上方の不織布が、透水速度が10秒以下である透水性不織布であり、
(2) 下方の不織布が、吸水量が250g/m2以上である保水性不織布
である吸水シート構成体、並びに
〔2〕 前記〔1〕記載の吸水シート構成体が、液体透過性シートと液体不透過性シートの間に挟持されている吸収性物品
に関する。
(b) 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。これに不織布を重ねて、加熱圧着する。
(c) 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) 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、さらに不織布を重ねて、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。
不織布の透水速度を、通液度測定機(インテック株式会社製、形式:Lister)を用いて測定した。図4、図5を用いて説明する。
不織布を(100±1)×(100±1)mmの大きさに切断し、1個の試験片の質量が、1g以上になるまで不織布をn枚重ねた。この試験片の質量Wa(g)を測定した後、ステンレス金網に試験片の縁をクリップで止めた。次に試験片と金網を、20±2℃の純水を入れた水槽中に、水面下20mmに斜めに入れて気泡の出ないようにした後、60±1秒間放置した。その後、試験片と金網を取り出し、試験片の一端のクリップを残して他のクリップを外し、垂直に120±3秒間つるし、水分を切った後金網から試験片を外し、吸水後の試験片の質量Wbを測定した。試験片の吸水量を、次式により求めた。
試験片の吸水量(g/m2)=[Wb−Wa](g)/(n×0.01)(m2)
ローラー型散布機(株式会社ハシマ製:シンターエースM/C)の投入口に、接着剤としてのエチレン−酢酸ビニル共重合体(EVA;溶融温度95℃)54質量部と、吸水性樹脂としてのアクリル酸部分中和物重合体の架橋物(住友精化株式会社製:アクアキープSA55SX-II)270質量部とを均一混合させたものを仕込んだ。一方、ローラー型散布機下部のコンベアーに、保水性不織布として幅15cmのスパンボンド不織布(繊維:ナイロン、目付量:53g/m2;「不織布C」とする)を敷いた。次いで、散布ローラーと下部コンベアーを稼動させることにより、前記混合物を目付量324g/m2で前記不織布上に均一に積層した。
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、保水性不織布として幅15cmのスパンレース不織布(繊維:レーヨン/PP/PE=8/1/1、目付量:39g/m2;「不織布D」とする)を敷いた後、接着剤としてスチレン−ブタジエン−スチレンブロック共重合体(SBS;軟化点85℃)を目付量20g/m2で当該不織布上に塗布した。
実施例1において、透水性不織布として不織布Bを使用し、接着剤120質量部と吸水性樹脂600質量部を均一混合したものを、目付量720g/m2で散布した以外は、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。得られた吸水シート構成体を所定の大きさに切断し、透水性不織布である不織布Bが上方となるようにして、後述の前記各種測定及び評価を行った。結果を表2に示す。
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、保水性不織布として幅15cmの前記不織布Dを敷いた後、接着剤としてスチレン−ブタジエン−スチレンブロック共重合体(SBS;軟化点85℃)を目付量11g/m2で当該不織布上に塗布した。
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、保水性不織布として幅15cmの前記不織布Dを敷いた後、接着剤としてスチレン−ブタジエン−スチレンブロック共重合体(SBS;軟化点85℃)を目付量6g/m2で当該不織布上に塗布した。
実施例2において、透水性不織布(不織布B)の代わりに不織布D、保水性不織布(不織布D)の代わりに不織布Bを使用した以外は、実施例2と同様の方法によって吸水シート構成体を得た。得られた吸水シート構成体を所定の大きさに切断し、不織布Dが上方となるようにして、後述の各種測定及び評価を行った。結果を表2に示す。
実施例2において、透水性不織布(不織布B)の代わりにエアスルー不織布(繊維:PP/PE=1/1、目付量:19g/m2;「不織布F」とする)を使用した以外は、実施例2と同様の方法によって吸水シート構成体を得た。得られた吸水シート構成体を所定の大きさに切断し、不織布Fが上方となるようにして、後述の各種測定及び評価を行った。結果を表2に示す。
実施例2において、透水性不織布(不織布B)の代わりに不織布A、保水性不織布(不織布D)の代わりに不織布Fを使用した以外は、実施例2と同様の方法によって吸水シート構成体を得た。得られた吸水シート構成体を所定の大きさに切断し、不織布Aが上方となるようにして、後述の各種測定及び評価を行った。結果を表2に示す。
実施例4において、透水性不織布(不織布A)の代わりに不織布Eを使用した以外は、実施例4と同様の方法によって吸水シート構成体を得た。得られた吸水シート構成体を所定の大きさに切断し、不織布Eが上方となるようにして、後述の各種測定及び評価を行った。結果を表2に示す。
実施例4において、保水性不織布(不織布D)の代わりに不織布Fを使用した以外は、実施例4と同様の方法によって吸水シート構成体を得た。得られた吸水シート構成体を所定の大きさに切断し、不織布Aが上方となるようにして、後述の各種測定及び評価を行った。結果を表2に示す。
得られた吸水シート構成体の厚みは、厚み測定器(株式会社尾崎製作所製、型番:J−B)を用いて測定した。測定箇所として、長手方向に左端、中央、右端の3箇所を任意に決め、例えば7.5×20cmの場合、左から5cmを左端、10cmを中央、15cmを右端とした。幅方向は均等な中央部を測定した。
吸水シート構成体を7.5×20cm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。
液体逆戻り量(g)=Wd−Wc(g)
傾斜における漏れ量は、図6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31を用いて、アクリル板32を傾斜させて固定した後、板上に載置した吸収性物品33に鉛直上方から滴下ロート34で前記の試験液を投入し、漏れ量を天秤35で計量する機構である。以下に詳細な仕様を示す。
11 接着剤
12 吸水性樹脂
13 吸収層
14 透水性不織布
15 保水性不織布
16 接着剤
17 通気性分画層
18 1次吸収層
19 2次吸収層
21 容器
22 磁気バルブ
23 ストライクスループレート
24 不織布サンプル
25 濾紙層
26 ベースプレート
27 中央孔
28 電極
31 架台
32 アクリル板
33 吸収性物品
34 滴下ロート
35 天秤
36 トレイ
Claims (5)
- 吸水性樹脂及び接着剤を含有してなる吸収層が、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、
(1) 上方の不織布が、透水速度が10秒以下である透水性不織布であり、
(2) 下方の不織布が、吸水量が250g/m2以上である保水性不織布
である吸水シート構成体。 - 透水性不織布が、ポリオレフィン繊維又はポリエステル繊維により製造される不織布である、請求項1に記載の吸水シート構成体。
- 保水性不織布が、ポリアミド繊維のスパンボンド不織布又はレーヨン繊維を主成分とするスパンレース不織布である、請求項1又は2に記載の吸水シート構成体。
- 接着剤が、エチレン−酢酸ビニル共重合体接着剤、スチレン系エラストマー接着剤、ポリオレフィン系接着剤及びポリエステル系接着剤からなる群より選ばれた少なくとも1種である、請求項1〜3のいずれか1項に記載の吸水シート構成体。
- 請求項1〜4のいずれか1項に記載の吸水シート構成体が、液体透過性シートと液体不透過性シートの間に挟持されている吸収性物品。
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WO2017171781A1 (en) | 2016-03-31 | 2017-10-05 | Kimberly-Clark Worldwide, Inc. | Absorbent cores and methods for forming absorbent cores |
KR102507704B1 (ko) | 2016-03-31 | 2023-03-09 | 킴벌리-클라크 월드와이드, 인크. | 흡수성 코어 및 흡수성 코어를 형성하기 위한 방법 |
KR102615974B1 (ko) * | 2016-03-31 | 2023-12-21 | 킴벌리-클라크 월드와이드, 인크. | 흡수성 코어 및 흡수성 코어를 형성하기 위한 방법 |
WO2017171785A1 (en) | 2016-03-31 | 2017-10-05 | Kimberly-Clark Worldwide, Inc. | Absorbent cores and methods for forming absorbent cores |
US11135097B2 (en) | 2016-03-31 | 2021-10-05 | Kimberly-Clark Wordwide, Inc. | Absorbent cores and methods for forming absorbent cores |
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JP7217268B2 (ja) | 2018-04-13 | 2023-02-02 | 株式会社日本触媒 | 吸水性シート、吸水性シートの製造方法および吸収性物品 |
WO2020032283A1 (ja) | 2018-08-09 | 2020-02-13 | 株式会社日本触媒 | 吸水性シートおよびそれを含む吸水性物品 |
JP7271150B2 (ja) * | 2018-11-30 | 2023-05-11 | ユニ・チャーム株式会社 | 吸収性物品 |
CN110464547B (zh) * | 2019-08-20 | 2021-11-19 | 佛山南宝高盛高新材料有限公司 | 一种立体复合芯体及其制备方法与应用 |
TWI780494B (zh) * | 2019-10-09 | 2022-10-11 | 德商卡爾科德寶兩合公司 | 複合材料在主動和/或被動冷卻的通電系統中用於吸收和分配液體的應用 |
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KR20140103353A (ko) | 2014-08-26 |
US20150005727A1 (en) | 2015-01-01 |
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AU2012359351B2 (en) | 2017-03-30 |
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AU2012359351A1 (en) | 2014-07-24 |
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