JP2017507709A - チャネルを備えた吸収性構造体を作製するための方法及び装置 - Google Patents
チャネルを備えた吸収性構造体を作製するための方法及び装置 Download PDFInfo
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Abstract
Description
a)第1及び第2支持体シートを第1の及び第2の無端の可動面に移送する移送手段と、
b)吸収性材料を、第1の無端の可動面上の堆積点において、少なくとも第1支持体シート上に供給するための供給機であって、吸収性材料は、支持体シート上の吸収性区域と、この吸収性区域間の1つ以上のチャネルとを形成し、チャネルは実質的に吸収性材料を含まない、供給機と、
c)少なくともチャネルの区域内において、第1及び第2支持体シートのうちの少なくとも一方に、接着剤を塗布するための接着剤アプリケータとを含む。
a)第1及び第2支持体シートを第1の及び第2の無端の可動面に移送するステップと、
b)吸収性材料を、第1の無端の可動面上の堆積点において少なくとも第1支持体シート上に供給するステップであって、吸収性材料は、吸収性区域と吸収性区域間の1つ以上のチャネルとを形成し、チャネルは実質的に吸収性材料を含まない、ステップと、
c)少なくともチャネルの区域内において、第1及び第2支持体シートのうちの少なくとも一方に、接着剤を塗布するステップとを含む。
「吸収性構造体」は、長手方向寸法と、これに対して垂直な横方向寸法と、両方に対して垂直な高さ寸法と、を有する三次元構造体を指し、これは少なくとも吸収性材料と、支持体シートとを備え、これは、吸収性物品において有用である。
図3は、印刷ロール156及び積層ドラム152が隣り合っている配置を図示する。図3に図示された実施形態では、ドラムは回転する円筒形ドラムである。外側シェルは、ステーターなどの固定内側チャンバの周囲を回転する。回転する外側シェルは、印刷ロール156から吸収性材料を受け取る1つ以上のレセプタクル33を担持する。
好ましい実施形態では、プロセスは、第1の及び第2の噛み合いストリップ間で所望の圧力を維持するように制御される。適用される圧力は、完成品において必要とされるチャネル結合強度を達成するための重要なプロセスパラメーターである。以下の説明において、2つのドラム間に適用された圧力が参照されるが、これらの原理は、ベルト及びローラーの組み合わせなど、無端の可動面の他の形態にも同じように適用され得る。
本明細書の吸収性材料100は、好ましくは、乾燥状態において流動性材料であり、最も好ましくは、粒子材料である。粒子の形態では、吸収性材料は、粒子、フレーク、繊維、球、凝集粒子、及び当業者に既知の他の形態であってもよい。
本発明の装置及び方法により製造された吸収性構造体は、吸収性材料を受け取るための支持体シート16を含む。支持体シート16は、任意の個別のシート又はウェブシート材料、特に紙、フィルム、織布若しくは不織布、又はこれらのいずれかの積層体であってもよい。
支持体シート16は、好ましくは無端の可動面への移送前に、移送時に、及び/又は移送後に、接着剤で処理される。したがって、図2に図示された装置は、接着剤塗布ユニット136、48、146、158を含む。本明細書の方法はまた、このような接着剤塗布ステップを含む。
本発明の装置及び方法によると、接着剤結合は、第1及び第2支持体シートの間の少なくともチャネルの領域の一部で形成される。接着接続した区域の結合長さは、様々な試験方法によって測定されてもよい。好ましい試験方法は、ASTM法D−903−98に規定される剥離強度試験法である。脆弱な支持体シートが、152mm(6インチ)/分の標準剥離速度では引き裂かれる結果になる場合、この値は低減されなければならない。剥離強度は、kg/mm(pbs/インチ)の試料の幅で表される。10mm/分が好ましい。
Claims (11)
- 吸収性物品のための吸収性構造体を作製するための装置であって、前記構造体は第1及び第2支持体シート(16、16’)と、これらの間の吸収性層とを含み、前記吸収性層は吸収性材料(100)を含み、前記装置は、
a)前記第1及び第2支持体シート(16、16’)を第1の及び第2の無端の可動面に移送するための移送手段と、
b)前記吸収性材料(100)を、前記第1の無端の可動面(30)上の堆積点において、少なくとも前記第1支持体シート(16)に供給するための供給機(156)であって、前記吸収性材料(100)は、前記第1支持体シート(16)上の吸収性区域と、前記吸収性区域の間の1つ以上のチャネルとを形成し、前記チャネルは、吸収性材料(100)を実質的に含まない、供給機(156)と、
c)少なくとも前記チャネルの区域内において、前記第1及び第2支持体シート(16、16’)のうちの少なくとも一方に、接着剤を塗布するための接着剤アプリケータ(148)と、を含む装置において、
前記第1の無端の可動面(30)は、1つ以上の実質的に長手方向に延びる第1の噛み合いストリップ(31)を含み、前記第2の無端の可動面は、対応する長手方向に延びる第2の噛み合いストリップを含み、前記第1の及び第2の噛み合いストリップは、少なくとも前記チャネルの領域の一部内において前記第1及び第2支持体シート(16、16’)に圧力を適用することにより、互いに対して作用し、これにより、前記第1及び第2支持体シート(16、16’)を共に接着することを特徴とする、装置。 - 前記第1の噛み合いストリップ(31)及び前記第2の噛み合いストリップは、弾性材料、好ましくはシリコーンから作製される、請求項1に記載の装置。
- 前記第1の無端の可動面(30)は、前記第1支持体シート(16)をその上に受け取るための空気透過性又は部分的に空気透過性の1つ以上のレセプタクル(33)を含む外側シェルを含み、前記外側シェルは、前記第1支持体シート(16)及び/又は前記支持体シート(16)上の前記吸収性材料(100)の保持を促進するための1つ以上の真空システムと接続される、請求項1又は2に記載の装置。
- 前記レセプタクル(33)は、横断方向において互いから離間されている複数の実質的に長手方向に延びるロッド(36)を更に含み、各ロッドは、少なくとも0.3mmかつ2.5mm未満の最大幅寸法を有し、前記ロッド(36)はそれぞれ、少なくとも1mmの平均高さ寸法を有する、請求項1〜3のいずれか一項に記載の装置。
- 前記供給機(156)は、複数のキャビティ(22)及び/又は溝部によって形成された貯蔵部(25)を含む、請求項1〜4のいずれか一項に記載の装置。
- 隆起したストリップ(21)に直接隣接する前記キャビティ(22)及び/又は溝部は、前記隆起したストリップ(21)に直接隣接しない1つ以上又は全ての隣り合うキャビティ(22)又は溝部の体積よりも大きい体積を有する、請求項5に記載の装置。
- 前記供給機(156)は、粒子状超吸収性ポリマー材料の供給機である、請求項1〜6のいずれか一項に記載の装置。
- 第2接着剤アプリケータ(158)を前記堆積点の下流に含む、請求項1〜7のいずれか一項に記載の装置。
- 第1及び第2支持体シート(16、16’)と、それらの上に吸収性材料(100)の吸収性層とを含む吸収性構造体を作製するための方法であって、前記方法は、
a)第1及び第2支持体シート(16、16’)を第1の及び第2の無端の可動面に移送するステップと
b)前記吸収性材料(100)を、前記第1の無端の可動面(30)上の堆積点で少なくとも前記第1支持体シート(16)上に供給するステップであって、前記吸収性材料(100)は、吸収性区域と前記吸収性区域間の1つ以上のチャネルとを形成し、前記チャネルは実質的に吸収性材料を含まない、ステップと、
c)少なくとも前記チャネルのある区域内において、前記第1及び第2支持体シート(16,16’)のうちの少なくとも一方に、接着剤を塗布するステップとを含む方法において、
前記第1の無端の可動面(30)は、実質的に長手方向に延びる1つ以上の第1の噛み合いストリップ(31)を含み、前記第2の無端の可動面(40)は、対応する長手方向に延びる第2の噛み合いストリップを含み、前記方法は、前記第1の及び第2の噛み合いストリップを介して、圧力を少なくとも前記チャネルのある領域の一部内において前記第1及び第2支持体シート(16、16’)に適用し、これにより、前記第1及び第2支持体シート(16、16’)を共に接着するステップを更に含むことを特徴とする、方法。 - 前記吸収性材料(100)は、粒子状超吸収性ポリマー材料である、請求項9に記載の方法。
- 第1接着剤塗布ユニット(148)を提供するステップと、前記吸収性材料(100)を前記支持体シート(16)上に堆積する前に、前記支持体シート(16)に接着剤を塗布するステップと、並びに/あるいは第2の接着剤塗布ユニット(158)を提供するステップと、前記第1の無端の可動面(30)から前記吸収性構造体を取り除く前に又はその直後に、前記吸収性構造体に接着剤を塗布するステップとを含む、請求項9又は10に記載の方法。
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