JP6396549B1 - 使い捨て着用物品 - Google Patents
使い捨て着用物品 Download PDFInfo
- Publication number
- JP6396549B1 JP6396549B1 JP2017140223A JP2017140223A JP6396549B1 JP 6396549 B1 JP6396549 B1 JP 6396549B1 JP 2017140223 A JP2017140223 A JP 2017140223A JP 2017140223 A JP2017140223 A JP 2017140223A JP 6396549 B1 JP6396549 B1 JP 6396549B1
- Authority
- JP
- Japan
- Prior art keywords
- elastic film
- region
- elastic
- sheet layer
- stretchable
- 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.)
- Active
Links
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Images
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Abstract
【解決手段】上記課題は、第1シート層20A及び第2シート層20Bの間に弾性フィルム30が積層され、第1シート層20A及び第2シート層20Bが、間隔を空けて配列された多数の接合部40で、弾性フィルム30を貫通する孔を通じて接合された、弾性フィルム伸縮構造20Xを備え、弾性フィルム伸縮構造20Xを有する領域は、弾性フィルム30とともに弾性伸縮する伸縮領域80を有し、伸縮領域80は、重なり部分33を有するように配置された複数枚の弾性フィルム30を含み、伸縮領域80における伸縮方向EDと直交する直交方向XDの中間に位置する領域と、第1領域26の両側に隣接する第2領域27とは弾性フィルム30の積層数が異なる、使い捨て着用物品により解決される。
【選択図】図4
Description
<第1の態様>
第1シート層及び第2シート層の間に弾性フィルムが積層され、前記第1シート層及び第2シート層が、間隔を空けて配列された多数の接合部で、弾性フィルムを貫通する孔を通じて又は前記弾性フィルムを介して接合された、弾性フィルム伸縮構造を備えており、
前記弾性フィルム伸縮構造を有する領域は、前記弾性フィルムとともに弾性伸縮する伸縮領域を有している、使い捨て着用物品において、
前記伸縮領域は、重なり部分を有するように配置された複数枚の弾性フィルムを含み、
前記伸縮領域における伸縮方向と直交する直交方向の中間に位置する第1領域と、前記第1領域の両側に隣接する第2領域とは、前記弾性フィルムの積層数が異なる、
ことを特徴とする使い捨て着用物品。
本態様では、伸縮領域における伸縮方向と直交する直交方向の中間に位置する第1領域と、第1領域の両側に隣接する第2領域とで、弾性フィルムの積層数が異なるため、接合部のパターンの変化や弾性フィルムの伸長率によらずとも、伸長時の収縮力を異なるものとすることができる。すなわち、接合部のパターンや弾性フィルムの伸長率が同じであれば、積層数の多い領域の収縮力が相対的に強くなり、積層数の少ない領域の収縮力が相対的に弱くなる。また、折り返しにより積層数を増加させる従来形態と異なり、積層数の多い部分の数や配置に制限もない。
前記弾性フィルムとして、一方の前記第2領域から前記第1領域まで延びる第1弾性フィルムと、他方の前記第2領域から前記第1領域まで延びる第2弾性フィルムとを含み、
前記一方の第2領域は、前記弾性フィルムとして前記第1弾性フィルムのみを含み、
前記他方の第2領域は、前記弾性フィルムとして前記第2弾性フィルムのみを含み、
前記第1領域は、前記弾性フィルムとして前記第1弾性フィルム及び第2弾性フィルムを含む、
第1の態様の使い捨て着用物品。
弾性フィルムの数や、積層数や配置は特に限定されるものではないが、弾性フィルムの積層数が多いと、接合部の形成が困難になる等、製造が困難になるおそれがあるため、本態様のように簡素な構造とすることが好ましい。
前記第1弾性フィルムにおける前記伸縮方向の4倍伸長時伸長応力と、前記第2弾性フィルムにおける前記伸縮方向の4倍伸長時伸長応力とが異なる、
第2の態様の使い捨て着用物品。
本態様のように、第1弾性フィルム及び第2弾性フィルムとして、伸長応力が異なるものを用いることにより、第2の態様の簡素な構造を維持しつつ、一方の第2領域、第1領域及び他方の第2領域の3つの領域で収縮力を異なるものとすることができる。
前記一方の第2領域の弾性限界伸びと、前記他方の第2領域の弾性限界伸びとが異なり、これらの大きい方の弾性限界伸びと、前記第1領域の弾性限界伸びとが同じである、
第2又は3の態様の使い捨て着用物品。
製造に際して第1シート層及び第2シート層を接合する時の各弾性フィルムの伸長率を異なるものとすれば、本態様のように、一方の第2領域の弾性限界伸びと、前記他方の第2領域の弾性限界伸びとが異なるものとなり、大きい方の弾性限界伸びと、第1領域の弾性限界伸びとが同じになる。本態様では、両方の弾性フィルムが自然長の状態にある初期段階から伸縮領域を伸縮方向に伸長していくと、一方の弾性フィルムが自然長の状態にあり、他方の弾性フィルムが伸長状態にある中間段階を経て、両方の弾性フィルムが伸長状態にある装着段階に至るようになる。したがって、着用に際して伸縮領域を伸長していく際、第1領域は、当初は弾性限界伸びが大きい方の第2領域と同じ伸長応力で伸長し、装着段階では伸長応力が最も強くなるため、装着しやすく、かつ装着状態でしっかりとしたフィット性が得られるようになる。
前身頃の胴周り部、後身頃の胴周り部及びそれの間に位置する中間部を有する、前後別々の又は前後一体の外装体と、
前記外装体に取り付けられ、前身頃から股間部を経て後身頃に至る内装体とを備え、
前身頃における外装体の両側部と後身頃における外装体の両側部とがそれぞれ接合されてサイドシール部が形成されるとともに、ウエスト開口及び左右一対の脚開口が形成された、パンツタイプの使い捨て着用物品であり、
前記前身頃の外装体及び前記後身頃の外装体の少なくとも一方は、幅方向に伸縮する前記伸縮領域を有している、
第1〜4のいずれか1つの態様の使い捨て着用物品。
パンツタイプの使い捨て着用物品では、外装体に幅方向に伸縮する伸縮領域を設けることが一般的である。そして、下腹部の膨らみに対するフィット性や、臀部の膨らみに対するフィット性を考慮すると、前記前身頃の外装体及び前記後身頃の外装体の少なくとも一方は、伸縮領域における伸縮方向と直交する方向の第1領域が、その両側に隣接する第2領域と異なる収縮力を有することが好ましい。
前記前身頃の外装体は前記胴周り部に前記伸縮領域を有し、前記後身頃の外装体は前記胴周り部から前記中間部にわたり前記伸縮領域を有しており、
それぞれの前記伸縮領域は、前記弾性フィルムとして、一方の前記第2領域から前記第1領域まで延びる第1弾性フィルムと、他方の前記第2領域から前記第1領域まで延びる第2弾性フィルムとを含み、
前記一方の第2領域は、前記弾性フィルムとして前記第1弾性フィルムのみを含み、
前記他方の第2領域は、前記弾性フィルムとして前記第2弾性フィルムのみを含み、
前記第1領域は、前記弾性フィルムとして前記第1弾性フィルム及び第2弾性フィルムを含み、
前記前身頃の外装体は、前記胴周り部に前記第1領域を有しており、
前記後身頃の外装体は、前記中間部に前記第1領域を有している、
第1〜5のいずれか1つの態様の使い捨て着用物品。
第1弾性フィルム及び第2弾性フィルムが重なる第1領域、及び第1弾性フィルムのみ又は第2弾性フィルムのみを含む第2領域を、本態様のように前後非対称の配置とすることにより、隙間が生じやすい腹部の下部及び臀部の下部(臀溝)に対するフィット性が良好となる。また、前身頃の第1領域及び後身頃の第1領域はサイドシール部で位置が異なるため、サイドシール部における素材積層数が局所的に過大となることがないため、装着感の悪化やサイドシール部のシール不良が防止される。
前記第1弾性フィルム及び第2弾性フィルムのうち、ウエスト開口側の弾性フィルムは反対側の弾性フィルムよりも前記伸縮方向の4倍伸長時伸長応力が弱い、
第6の態様の使い捨て着用物品。
本態様のように、第1弾性フィルム及び第2弾性フィルムとして、伸長応力が異なるものを用いることにより、装着時、隙間が発生しやすい箇所をしっかりと締め付けつつ、これよりもウエスト開口側の収縮力を最も弱くして、ウエスト開口側の締め付け感を低減することができる。
図1〜図6はパンツタイプ使い捨ておむつの一例を示している。このパンツタイプ使い捨ておむつ(以下、単におむつともいう。)は、前身頃F及び後身頃Bをなす外装体20と、この外装体20の内面に固定され一体化された内装体10とを有しており、内装体10は液透過性のトップシート11と液不透過性シート12との間に吸収体13が介在されてなるものである。製造に際しては、外装体20の内面(上面)に対して内装体10の裏面がホットメルト接着剤などの接合手段によって接合された後に、内装体10及び外装体20が前身頃F及び後身頃Bの境界である前後方向LD(縦方向)の中央で折り畳まれ、その両側部が相互に熱溶着又はホットメルト接着剤などによって接合されてサイドシール部21が形成されることによって、ウエスト開口及び左右一対の脚開口が形成されたパンツタイプ使い捨ておむつとなる。
内装体10は、図4〜図6に示すように、トップシート11と、ポリエチレン等からなる液不透過性シート12との間に、吸収体13を介在させた構造を有しており、トップシート11を透過した排泄液を吸収保持するものである。内装体10の平面形状は特に限定されないが、図1に示されるようにほぼ長方形とすることが一般的である。
外装体20は内装体10の側縁より側方まで延在されている。外装体20は図示形態のように股間部において外装体20の側縁が内装体10の側縁より幅方向中央側に位置していても、また幅方向外側に位置していても良い。また、外装体20は、サイドシール部21と対応する前後方向範囲である胴周り部Tと、前身頃Fの胴周り部T及び後身頃Bの胴周り部Tの間の前後方向範囲である中間部Lとを有する。外装体20の平面形状は、中間部Lの幅方向両側縁29がそれぞれ脚周りに沿う曲線状に形成されており、全体として砂時計に似た形状をなしている。外装体20は、前身頃F及び後身頃Bで個別に形成し、両者が股間部で前後方向LDに離間するように配置しても良い。
外装体20における弾性フィルム伸縮構造20Xを有する領域は、幅方向WDに伸縮可能、つまり自然長状態では弾性フィルム30の収縮力により幅方向WDに収縮しているとともに、装着時には幅方向WDに伸長可能な伸縮領域を有している。このような伸縮領域は、弾性フィルム30を幅方向WDに伸長した状態で、間隔を空けた多数個所で、弾性フィルム30の貫通孔31を介して第1シート層20A及び第2シート層20Bを接合することにより形成することができ、十分な伸縮性を発揮するためには、弾性フィルム30が幅方向WDに沿って直線的に連続する部分32を有するように、貫通孔31及び接合部を幅方向WD及びこれと直交する前後方向LD(直交方向XD)にそれぞれ間隔を空けて配置することが好ましい。
接合部40の面積:0.14〜3.5mm2(特に0.14〜1.0mm2)
接合部40の面積率:1.8〜19.1%(特に1.8〜10.6%)
図2に示す例は、弾性フィルム30伸縮構造20Xの全体を伸縮領域80とし、非伸縮領域を有しないものであるが、弾性フィルム伸縮構造20Xを有する領域には、図15に示すように、伸縮領域80の少なくとも幅方向一方側等に非伸縮領域70を設けることができる。伸縮領域80及び非伸縮領域70の配置は適宜定めることができる。本実施形態のようなパンツタイプ使い捨ておむつの外装体20の場合、吸収体13と重なる部分は伸縮が不要な領域であるため、図示形態のように、吸収体13と重なる部分の一部又は全部(内外固定領域10Bのほぼ全体を含むことが望ましい)を非伸縮領域70とするのは好ましい。もちろん、吸収体13と重なる領域からその幅方向WD又は前後方向LDに位置する吸収体13と重ならない領域にかけて非伸縮領域70を設けることもでき、吸収体13と重ならない領域にのみ非伸縮領域70を設けることもできる。
接合部40の面積:0.10〜0.75mm2(特に0.10〜0.35mm2)
接合部40の面積率:4〜13%(特に5〜10%)
特徴的には、伸縮領域80は、重なり部分33を有するように配置された複数枚の弾性フィルム30を含み、伸縮領域80における前後方向LD(直交方向XD)の中間に位置する第1領域26と、第1領域26の両側に隣接する第2領域27とは、弾性フィルム30の積層数が異なっている。これにより、弾性フィルム30の積層数が異なるため、接合部40のパターンの変化や弾性フィルム30の伸長率によらずとも、伸長時の収縮力を異なるものとすることができる。すなわち、接合部40のパターンや弾性フィルム30の伸長率が同じであれば、積層数の多い領域の収縮力が相対的に強くなり、積層数の少ない領域の収縮力が相対的に弱くなる。
上述の伸縮構造20Xは、パンツタイプ使い捨ておむつだけでなく、テープタイプ使い捨ておむつの胴周りやファスニングテープ、吸収性物品全般に汎用されている立体ギャザー、平面ギャザー等、他の伸縮部等にも適用することができる。また、図示例は伸縮方向が幅方向とされているが、幅方向及び前後方向の両方向としたりすることも可能である。
明細書中の以下の用語は、明細書中に特に記載が無い限り、以下の意味を有するものである。
・「前身頃」「後身頃」は、パンツタイプ使い捨ておむつの前後方向中央を境としてそれぞれ前側及び後側の部分を意味する。また、股間部は、パンツタイプ使い捨ておむつの前後方向中央を含む前後方向範囲を意味し、吸収体が括れ部を有する場合には当該括れ部を有する部分の前後方向範囲を意味する。
・「弾性限界伸び」とは、伸縮方向EDにおける弾性限界(換言すれば第1シート層及び第2シート層が完全に展開した状態)の伸びを意味し、弾性限界時の長さを自然長を100%としたときの百分率で表すものである。
・「面積率」とは単位面積に占める対象部分の割合を意味し、対象領域(例えば伸縮領域80、非伸縮領域70、主伸縮部分、緩衝伸縮部分)における対象部分(例えば接合部40、貫通孔31の開口等)の総和面積を当該対象領域の面積で除して百分率で表すものであり、特に伸縮構造を有する領域における「面積率」とは、伸縮方向EDに弾性限界まで伸ばした状態の面積率を意味するものである。対象部分が間隔を空けて多数設けられる形態では、対象部分が10個以上含まれるような大きさに対象領域を設定して、面積率を求めることが望ましい。
・「伸長率」は、自然長を100%としたときの値を意味する。
・「目付け」は次のようにして測定されるものである。試料又は試験片を予備乾燥した後、標準状態(試験場所は、温度23±1℃、相対湿度50±2%)の試験室又は装置内に放置し、恒量になった状態にする。予備乾燥は、試料又は試験片を温度100℃の環境で恒量にすることをいう。なお、公定水分率が0.0%の繊維については、予備乾燥を行わなくてもよい。恒量になった状態の試験片から、試料採取用の型板(100mm×100mm)を使用し、100mm×100mmの寸法の試料を切り取る。試料の重量を測定し、100倍して1平米あたりの重さを算出し、目付けとする。
・吸収体の「厚み」は、株式会社尾崎製作所の厚み測定器(ピーコック、ダイヤルシックネスゲージ大型タイプ、型式J−B(測定範囲0〜35mm)又は型式K−4(測定範囲0〜50mm))を用い、試料と厚み測定器を水平にして、測定する。
・上記以外の「厚み」は、自動厚み測定器(KES−G5 ハンディ圧縮計測プログラム)を用い、荷重:0.098N/cm2、及び加圧面積:2cm2の条件下で自動測定する。
・「引張強度」及び「引張伸度(破断伸び)」は、試験片を幅35mm×長さ80mmの長方形状とする以外は、JIS K7127:1999「プラスチック−引張特性の試験方法−」に準じて、初期チャック間隔(標線間距離)を50mmとし、引張速度を300mm/minとして測定される値を意味する。
・「伸長応力」とは、JIS K7127:1999「プラスチック−引張特性の試験方法−」に準じて、初期チャック間隔(標線間距離)を50mmとし、引張速度を300mm/minとする引張試験により、弾性領域内で伸長するときに測定される引張応力(N/35mm)を意味し、伸長の程度は試験対象により適宜決定することができる。試験片は幅35mm、長さ80mm以上の長方形状とすることが好ましいが、幅35mmの試験片を切り出すことができない場合には、切り出し可能な幅で試験片を作成し、測定値を幅35mmに換算した値とする。また、製品に内蔵された弾性フィルムのように、対象領域が小さかったり、十分な大きさの試験片を採取できなかったりする場合であっても、伸長応力の大小を比較するのであれば、適宜小さい試験片でも同寸法の試験片を用いる限り少なくとも比較は可能である。
・「展開状態」とは、収縮や弛み無く平坦に展開した状態を意味する。
・各部の寸法は、特に記載が無い限り、自然長状態ではなく展開状態における寸法を意味する。
・試験や測定における環境条件についての記載が無い場合、その試験や測定は、標準状態(試験場所は、温度23±1℃、相対湿度50±2%)の試験室又は装置内で行うものとする。
Claims (7)
- 第1シート層及び第2シート層の間に弾性フィルムが積層され、前記第1シート層及び第2シート層が、間隔を空けて配列された多数の接合部で、弾性フィルムを貫通する孔を通じて又は前記弾性フィルムを介して接合された、弾性フィルム伸縮構造を備えており、
前記弾性フィルム伸縮構造を有する領域は、前記弾性フィルムとともに弾性伸縮する伸縮領域を有している、使い捨て着用物品において、
前記伸縮領域は、重なり部分を有するように配置された複数枚の弾性フィルムを含み、
前記伸縮領域における伸縮方向と直交する直交方向の中間に位置する第1領域は、前記第1領域の両側に隣接する第2領域よりも前記弾性フィルムの積層数が多い、
ことを特徴とする使い捨て着用物品。 - 前記弾性フィルムとして、一方の前記第2領域から前記第1領域まで延びる第1弾性フィルムと、他方の前記第2領域から前記第1領域まで延びる第2弾性フィルムとを含み、
前記一方の第2領域は、前記弾性フィルムとして前記第1弾性フィルムのみを含み、
前記他方の第2領域は、前記弾性フィルムとして前記第2弾性フィルムのみを含み、
前記第1領域は、前記弾性フィルムとして前記第1弾性フィルム及び第2弾性フィルムを含む、
請求項1記載の使い捨て着用物品。 - 前記第1弾性フィルムにおける前記伸縮方向の4倍伸長時伸長応力と、前記第2弾性フィルムにおける前記伸縮方向の4倍伸長時伸長応力とが異なる、
請求項2記載の使い捨て着用物品。 - 前記一方の第2領域の弾性限界伸びと、前記他方の第2領域の弾性限界伸びとが異なり、これらの大きい方の弾性限界伸びと、前記第1領域の弾性限界伸びとが同じである、
請求項2又は3記載の使い捨て着用物品。 - 前身頃の胴周り部、後身頃の胴周り部及びそれの間に位置する中間部を有する、前後別々の又は前後一体の外装体と、
前記外装体に取り付けられ、前身頃から股間部を経て後身頃に至る内装体とを備え、
前身頃における外装体の両側部と後身頃における外装体の両側部とがそれぞれ接合されてサイドシール部が形成されるとともに、ウエスト開口及び左右一対の脚開口が形成された、パンツタイプの使い捨て着用物品であり、
前記前身頃の外装体及び前記後身頃の外装体の少なくとも一方は、幅方向に伸縮する前記伸縮領域を有している、
請求項1〜4のいずれか1項に記載の使い捨て着用物品。 - 前記前身頃の外装体及び前記後身頃の外装体はそれぞれ前記伸縮領域を有しており、
前記伸縮領域は、前記弾性フィルムとして、一方の前記第2領域から前記第1領域まで延びる第1弾性フィルムと、他方の前記第2領域から前記第1領域まで延びる第2弾性フィルムとを含み、
前記一方の第2領域は、前記弾性フィルムとして前記第1弾性フィルムのみを含み、
前記他方の第2領域は、前記弾性フィルムとして前記第2弾性フィルムのみを含み、
前記第1領域は、前記弾性フィルムとして前記第1弾性フィルム及び第2弾性フィルムを含み、
前記前身頃の外装体は、前記胴周り部に前記第1領域を有しており、
前記後身頃の外装体は、前記中間部に前記第1領域を有している、
請求項5記載の使い捨て着用物品。 - 前記第1弾性フィルム及び第2弾性フィルムのうち、ウエスト開口側の弾性フィルムは反対側の弾性フィルムよりも前記伸縮方向の4倍伸長時伸長応力が弱い、
請求項6記載の使い捨て着用物品。
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EP3656363A4 (en) | 2021-04-07 |
CN110536668A (zh) | 2019-12-03 |
CN110536668B (zh) | 2021-10-12 |
US11730637B2 (en) | 2023-08-22 |
US20230181387A1 (en) | 2023-06-15 |
WO2019017037A1 (ja) | 2019-01-24 |
EP3656363B1 (en) | 2023-10-18 |
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