JP5945075B2 - 吸収性物品 - Google Patents
吸収性物品 Download PDFInfo
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- JP5945075B2 JP5945075B2 JP2015528362A JP2015528362A JP5945075B2 JP 5945075 B2 JP5945075 B2 JP 5945075B2 JP 2015528362 A JP2015528362 A JP 2015528362A JP 2015528362 A JP2015528362 A JP 2015528362A JP 5945075 B2 JP5945075 B2 JP 5945075B2
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- superabsorbent polymer
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- 239000002250 absorbent Substances 0.000 title claims description 46
- 230000002745 absorbent Effects 0.000 title claims description 45
- 229920000247 superabsorbent polymer Polymers 0.000 claims description 87
- 238000010521 absorption reaction Methods 0.000 claims description 50
- 239000004745 nonwoven fabric Substances 0.000 claims description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 229920000642 polymer Polymers 0.000 claims description 18
- 239000002504 physiological saline solution Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 7
- 241001122767 Theaceae Species 0.000 claims description 6
- 230000000704 physical effect Effects 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 3
- 238000007654 immersion Methods 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 239000006096 absorbing agent Substances 0.000 description 27
- 210000001124 body fluid Anatomy 0.000 description 27
- 239000010839 body fluid Substances 0.000 description 21
- 239000000835 fiber Substances 0.000 description 21
- -1 polyethylene Polymers 0.000 description 15
- 238000000034 method Methods 0.000 description 14
- 239000004698 Polyethylene Substances 0.000 description 8
- 239000011230 binding agent Substances 0.000 description 8
- 239000012530 fluid Substances 0.000 description 8
- 238000002844 melting Methods 0.000 description 8
- 229920000573 polyethylene Polymers 0.000 description 8
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 239000004743 Polypropylene Substances 0.000 description 5
- 238000004049 embossing Methods 0.000 description 5
- 239000000839 emulsion Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 229920000728 polyester Polymers 0.000 description 5
- 229920001155 polypropylene Polymers 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 4
- 206010021639 Incontinence Diseases 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- 150000001336 alkenes Chemical class 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 238000007666 vacuum forming Methods 0.000 description 3
- 239000004952 Polyamide Substances 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 229920000058 polyacrylate Polymers 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920005672 polyolefin resin Polymers 0.000 description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 239000004831 Hot glue Substances 0.000 description 1
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical group CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 239000002998 adhesive polymer Substances 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002175 menstrual effect Effects 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000955 prescription drug Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
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- Health & Medical Sciences (AREA)
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- Veterinary Medicine (AREA)
- Engineering & Computer Science (AREA)
- Public Health (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Heart & Thoracic Surgery (AREA)
- Biomedical Technology (AREA)
- Vascular Medicine (AREA)
- Materials Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Hematology (AREA)
- Absorbent Articles And Supports Therefor (AREA)
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Description
(1)立体開孔メッシュシートの上面に体液を残留させないようにするには、吸収体が十分な体液吸収能を備える必要があるところ、前記エアレイドを吸収体として用いた薄型の吸収性物品の場合は、従来のフラップパルプ吸収体よりも体液の吸収量が少ない。この欠点を補うためには、(1)目付けを上げる、(2)高吸収性ポリマーの混合量を増加するなどの方法が考えられるが、目付けを上げた場合は吸収体が厚くなり、エアレイド吸収体を用いた意義が失われてしまう。また、高吸収性ポリマーの配合量を上げすぎると、膨潤した吸水ポリマー間の空隙が極端に低下する、所謂「ゲルブロッキング」が発生し、所望の吸水力を発現できなくなる、高吸収性ポリマーが偏って配置され易く、型崩れを起こしやすくなるなどの問題が発生してしまう。
(2)立体開孔メッシュシートの上面に体液を残留させないように吸収体に素早く体液を吸収させるために、前記特許文献1では、前記微小開口とは別に、巨視的デボスを形成すること、そしてこれら巨視的デボスの底面を流体通過孔として開口とするが記載されているが、高吸収性ポリマーの配合量を上げたエアレイド吸収体の場合、前記流体通過孔から高吸収性ポリマーが逸脱する場合がある。
前記透液性表面シートは、肌側に突出する多数の微小凸部が形成されるとともに、これら微小凸部の頂面を開孔とした立体開孔メッシュシートを用い、この立体開孔メッシュシートに対して、非肌面側に窪む多数の凹部が形成されているとともに、前記凹部の形状は凹部間の横断面形状が肌側に突出する円弧状を成し、その境界部に形成された逆錐状の凹部とされ、
前記吸収体は、前記透液性表面シート側から順に、エアレイドパルプ不織布層、高吸収性ポリマーA層、エアレイドパルプ不織布層、高吸収性ポリマーB層、エアレイドパルプ不織布層の5層構造のエアレイド吸収体とされ、前記高吸収性ポリマーA層を構成する高吸収性ポリマーは前記高吸収性ポリマーB層を構成する高吸収性ポリマーよりも相対的に吸収速度の高い物性値を有するものが使用されており、前記高吸収性ポリマーB層を構成する高吸収性ポリマーは前記高吸収性ポリマーA層を構成する高吸収性ポリマーよりも相対的に吸収容量が高い物性値を有するものが使用されており、前記透液性表面シートと吸収体との間に、エアスルー不織布が介在されていることを特徴とする吸収性物品が提供される。
(1)100mlビーカーに生理食塩水50mlとスターラーチップを入れ、ビーカーをマグネチックスターラーに載せる。
(2)マグネチックスターラーの回転数を600±60回に合わせ、生理食塩水に渦を発生させた後に2.0gをビーカーに素早く添加する。
(3)ストップウォッチを用いて、ポリマー添加後から液面の渦が収束する時点までの時間(s)を計測し、吸収速度(s)とする。
<吸水量試験>
(1)ポリマー0.5gをティーバッグ(200メッシュナイロン製袋)を、200mlビーカーに生理食塩水100mlを入れる。
(2)30分間浸漬し、浸漬後5分間吊して水切りし、質量Wa(g)を測定する。
(3)ポリマーを入れていないティーバッグも同様の操作を行い、質量Wb(g)を測定する。
(4)Wa(g)−Wb(g)/ポリマーの質量(g)より、吸水量(g)を求める。
生理用ナプキン1は、主にはパンティライナー、生理用ナプキン、失禁パッドなどの用途に供されるもので、例えば図1に示されるように、ポリエチレンシートなどからなる不透液性裏面シート2と、経血やおりものなどを速やかに透過させる透液性表面シート3と、これら両シート2,3間に介装されたエアレイド吸収体4と、前記吸収体4を囲繞するテッシュなどのクレープ紙5と、前記透液性表面シート3と吸収体4との間に配置されるセカンドシート6とから主に構成されている。前記吸収体4の周囲においては、前記不透液性裏面シート2と透液性表面シート3とがホットメルト接着剤等の接合手段によって接合されている。前記クレープ紙5は省略してもよい。
(1)100mlビーカーに生理食塩水50mlとスターラーチップを入れ、ビーカーをマグネチックスターラーに載せる。
(2)マグネチックスターラーの回転数を600±60回に合わせ、生理食塩水に渦を発生させた後に2.0gをビーカーに素早く添加する。
(3)ストップウォッチを用いて、ポリマー添加後から液面の渦が収束する時点までの時間(s)を計測し、吸収速度(s)とする。
(1)ポリマー0.5gをティーバッグ(200メッシュナイロン製袋)を、200mlビーカーに生理食塩水100mlを入れる。
(2)30分間浸漬し、浸漬後5分間吊して水切りし、質量Wa(g)を測定する。
(3)ポリマーを入れていないティーバッグも同様の操作を行い、質量Wb(g)を測定する。
(4)Wa(g)−Wb(g)/ポリマーの質量(g)より、吸水量(g)を求める。
(1)上記形態例では高吸収性ポリマーA層12を一様に形成したが、ゲルブロッキングを防止するため、高吸収性ポリマーの存在しない部分を点在させるようにしてもよい。
Claims (4)
- 透液性表面シートと裏面シートとの間に吸収体が介在された吸収性物品において、
前記透液性表面シートは、肌側に突出する多数の微小凸部が形成されるとともに、これら微小凸部の頂面を開孔とした立体開孔メッシュシートを用い、この立体開孔メッシュシートに対して、非肌面側に窪む多数の凹部が形成されているとともに、前記凹部の形状は凹部間の横断面形状が肌側に突出する円弧状を成し、その境界部に形成された逆錐状の凹部とされ、
前記吸収体は、前記透液性表面シート側から順に、エアレイドパルプ不織布層、高吸収性ポリマーA層、エアレイドパルプ不織布層、高吸収性ポリマーB層、エアレイドパルプ不織布層の5層構造のエアレイド吸収体とされ、前記高吸収性ポリマーA層を構成する高吸収性ポリマーは前記高吸収性ポリマーB層を構成する高吸収性ポリマーよりも相対的に吸収速度の高い物性値を有するものが使用されており、前記高吸収性ポリマーB層を構成する高吸収性ポリマーは前記高吸収性ポリマーA層を構成する高吸収性ポリマーよりも相対的に吸収容量が高い物性値を有するものが使用されており、前記透液性表面シートと吸収体との間に、エアスルー不織布が介在されていることを特徴とする吸収性物品。 - 前記高吸収性ポリマーA層を構成する高吸収性ポリマーは、下記<吸水速度試験>による吸収速度が40(s)未満である請求項1記載の吸収性物品。
<吸水速度試験>
(1)100mlビーカーに生理食塩水50mlとスターラーチップを入れ、ビーカーをマグネチックスターラーに載せる。
(2)マグネチックスターラーの回転数を600±60回に合わせ、生理食塩水に渦を発生させた後に2.0gをビーカーに素早く添加する。
(3)ストップウォッチを用いて、ポリマー添加後から液面の渦が収束する時点までの時間(s)を計測し、吸収速度(s)とする。 - 前記高吸収性ポリマーB層を構成する高吸収性ポリマーは、下記<吸水量試験>による吸水量が70(g)以上である請求項1,2いずれかに記載の吸収性物品。
<吸水量試験>
(1)ポリマー0.5gをティーバッグ(200メッシュナイロン製袋)を、200mlビーカーに生理食塩水100mlを入れる。
(2)30分間浸漬し、浸漬後5分間吊して水切りし、質量Wa(g)を測定する。
(3)ポリマーを入れていないティーバッグも同様の操作を行い、質量Wb(g)を測定する。
(4)Wa(g)−Wb(g)/ポリマーの質量(g)より、吸水量(g)を求める。 - 前記吸収体は、目付けが150〜200g/m2であり、吸収体の全重量に対する高吸収性ポリマーの配合重量が30〜50重量%であり、前記高吸収性ポリマーA層を構成する高吸収性ポリマー/前記高吸収性ポリマーB層を構成する高吸収性ポリマーの重量比率が1〜1.5であり、全体の厚みが2mm以下である請求項1〜3いずれかに記載の吸収性物品。
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US10806640B2 (en) * | 2016-03-30 | 2020-10-20 | Basf Se | Ultrathin fluid-absorbent article |
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US10813797B2 (en) * | 2017-06-22 | 2020-10-27 | The Procter & Gamble Company | Laminate webs and absorbent articles having the same |
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