JP5602776B2 - シート部材、高密度領域含有シートの製造方法およびシート部材を使用した使い捨ておむつ - Google Patents
シート部材、高密度領域含有シートの製造方法およびシート部材を使用した使い捨ておむつ Download PDFInfo
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Description
図1は、本発明の高密度領域含有シートの製造方法の一例を示した図である。図1に示したような一対のエンボスロール等からなる賦形ロール3でシート1を圧搾し、予め密度の高いシート1を伸張させて低密度領域22を設けることにより、高密度領域含有シート2を製造する。賦形ロール3には、一定の大きさの歯を複数有する歯付領域31を有し、一対の賦形ロール3は、互いに対向して回転し、シート1を圧搾する。歯付領域31の歯により圧搾された部分は繊維が伸張することにより低密度領域22となり、圧搾されない部分は高密度領域21となる。シート1を一対の賦形ロール3内を通過させ、かつ、賦形ロール3を回転させると、図4に示すように歯付領域31で圧搾された箇所は、歯の間隔ごとに高密度領域21と低密度領域22が形成される。なお、図1では、一対の賦形ロール3により、シート1を圧搾しているが、シート1が高密度の場合、一つの賦形ロール3のみを用いてシート1を圧搾するようにしてもよい。
図1または図2に記載の製造方法等によって得られた高密度領域含有シート2は、図4に示したように高密度領域21と低密度領域22が交互に形成されている。この高密度領域含有シート2(第一のシートまたは第二のシート)と、シートを伸張した状態の弾性部材4に接合させることによって、シート部材5を得ることができる。なお、シートは高密度領域含有シート2であってもよい。以下、説明の便宜上、二つの高密度領域含有シート2と弾性部材4を接合させたシート部材5について説明する。
以下、上述したシート部材5を使用した使い捨ておむつについて詳細に説明するが、使い捨ておむつのうち着用者の身体に向けられる側を肌当接面側とし、肌当接面側と反対側を非肌当接面側とする。
ポリプロピレンスパンボンド(PPSB)を19g/m2とSMS不織布15g/m2に対して高密度領域21の長さが0.45mmとなり、低密度領域22の長さが1.65mmとなるような歯付領域31を有する賦形ロール3で圧搾し、高密度領域含有シート2を得た。なお、第1の剛性を得るための高密度領域21の密度は、0.07g/cm3であり、第2の剛性を得るための低密度領域22の密度は、0.034g/cm3であった。
通常の収縮時より2倍に伸張させた状態で、620デニールの弾性部材4を介して予め作製した高密度領域含有シート2を積層させ、シート部材5を作製した。なお、弾性部材4のピッチを5mmとした(以下、試料1という。)。
不織布の曲げ特性試験機(KES FB−2 カトーテック(株)社製)に、100mm×100mmの試料1をMD方向と垂直に曲がるようにセットし、曲げ剛さとヒステリシスを測定するKES試験を行った。なお、CD方向も同様に測定した。
2 高密度領域含有シート
21 高密度領域
22 低密度領域
23 溝領域
24 接着剤層
3 賦形ロール
31 歯付領域
32 溝付領域
4 弾性部材
5 シート部材
51 凸部
52 凹部
6 液透過性トップシート
7 液不透過性バックシート
8 吸収体
9 シャーシー
91 前胴周り部
92 後胴周り部
93 股下部
10 接合部
11 胴周り開口部
12 脚周り開口部
Claims (10)
- シートを、歯付領域を有する賦形ロールで圧搾することにより、弾性部材に接合される前に複数の高密度領域と複数の低密度領域とが形成されている高密度領域含有シートを製造し、
前記弾性部材に直接接着剤を塗布し、
前記高密度領域含有シートの前記高密度領域を一つ置きに、伸張した状態の前記弾性部材に接合させることを特徴とするシート部材の製造方法。 - 前記高密度領域含有シートは、長手方向に沿って凹凸状に形成されていることを特徴とする請求項1に記載のシート部材の製造方法。
- 前記シートを一対の互いに対向して回転する前記賦形ロールの間に圧搾する請求項1または2に記載のシート部材の製造方法。
- 前記高密度領域と前記低密度領域は、前記シートの長手方向に交互に形成される請求項1から3のいずれか1項に記載のシート部材の製造方法。
- 前記賦形ロールは、少なくとも一つの前記歯付領域と、少なくとも一つの溝付領域とを有する請求項4に記載のシート部材の製造方法。
- 前記溝付領域は、断熱材で覆われている請求項5に記載のシート部材の製造方法。
- 伸長している状態の前記弾性部材と、前記高密度領域含有シートの前記高密度領域とを接合する請求項5または6に記載のシート部材の製造方法。
- 前記高密度領域含有シートを、前記賦形ロールを通過させた後、冷却する請求項1から7のいずれか1項に記載のシート部材の製造方法。
- 前記弾性部材に対して、Vスリット塗工、Ω塗工、コントロールシーム塗工によって直接接着剤を塗工する請求項1から8のいずれか1項に記載のシート部材の製造方法。
- 前胴周り部と後胴周り部とからなり、胴周り開口部と、股下部に左右一対の脚周り開口部と、を有するシャーシーと、
該シャーシーの少なくとも一部に配設される液透過性トップシートと、
該液透過性トップシートの厚さ方向における一方側に配設される液不透過性バックシートと、
前記液透過性トップシートと前記液不透過性バックシートとの間に配設される液保持性の吸収体と、を備える使い捨ておむつであって、
前記シャーシーのうち、前記胴周り開口部と前記脚周り開口部との間に渡って請求項1から9のいずれか1項に記載のシート部材の製造方法で製造された前記シート部材を使用した使い捨ておむつ。
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JP2012020997A Active JP5602776B2 (ja) | 2006-07-07 | 2012-02-02 | シート部材、高密度領域含有シートの製造方法およびシート部材を使用した使い捨ておむつ |
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KR (1) | KR20090034872A (ja) |
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EP2039504A1 (en) | 2009-03-25 |
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TWI344839B (en) | 2011-07-11 |
US8105303B2 (en) | 2012-01-31 |
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US20120101461A1 (en) | 2012-04-26 |
EP2431169B1 (en) | 2017-01-11 |
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JP2012126140A (ja) | 2012-07-05 |
WO2008004456A1 (fr) | 2008-01-10 |
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