JPH08504474A - 湿潤までは薄い、水性体液用の吸収体フォーム材料及びその製造方法 - Google Patents
湿潤までは薄い、水性体液用の吸収体フォーム材料及びその製造方法Info
- Publication number
- JPH08504474A JPH08504474A JP6514208A JP51420894A JPH08504474A JP H08504474 A JPH08504474 A JP H08504474A JP 6514208 A JP6514208 A JP 6514208A JP 51420894 A JP51420894 A JP 51420894A JP H08504474 A JPH08504474 A JP H08504474A
- Authority
- JP
- Japan
- Prior art keywords
- foam
- weight
- water
- absorbent
- fluid
- 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.)
- Granted
Links
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- C08J2201/05—Elimination by evaporation or heat degradation of a liquid phase
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Abstract
Description
Claims (1)
- 【特許請求の範囲】 1. 相互連結された連続気泡からなる親水性で可撓性で非イオン性のポリマ ーフォーム構造を持つ、水性の体液との接触時に膨張し且つ前記流体を吸収する 潰れたポリマーフォーム材料において、前記フォーム構造が、 A)フォーム容積当たりの比表面積が少なくとも約0.025m2/ccであり、好 ましくは約0.05m2/ccであり、 B)毒性について問題のない吸湿性の水和塩が少なくとも約0.1重量%組み込 んであり、 C)その潰れた状態での膨張圧力が約30kPa又はそれ以下であり、好ましくは 約7kPa乃至約20kPaであり、 D)その膨張状態において、表面張力が65±5dynes/cmの合成尿でその自由吸 収力まで31.1OC(88OF)で飽和させたときの密度が、その潰れた状態での 乾燥時の密度の約10%乃至約50%、好ましくは約10%乃至約30%である 、 ことを特徴とするフォーム材料。 2. 前記フォーム構造は、 A)毛管吸引比表面積が約0.7m2/g乃至約8m2/g、好ましくは約1.5m2/g乃 至約6m2/gであり、 B)フォーム構造の表面を親水性にするため、塩化カルシウムを約0.1重量% 乃至約8重量%、好ましくは約 3重量%乃至約6重量%、及び非イオン性の油溶性乳化剤を約0.5重量%乃至 約20重量%、好ましくは約5重量%乃至約12重量%含み、 C)その潰れた状態において、 (i)残留水含有量が少なくとも約4重量%、好ましくは約4重量%乃至約30 重量%、最も好ましくは約5重量%乃至約15重量%であり、 (ii)乾燥時の密度が約0.05g/cm3乃至約0.4g/cm3であり、好ましくは約 0.1g/cm3乃至約0.2g/cm3であり、 D)その膨張状態において、 (i)細孔容積が約12mL/g乃至約100mL/gであり、好ましくは約25mL/g乃 至約50mL/gであり、 (ii)表面張力が65±5dynes/cmの合成尿でその自由吸収力まで31.1OC( 88OF)で飽和させたときの圧縮−撓みに対する抵抗が、約2%乃至約80%、 好ましくは約5%乃至約40%であり、 (iii)気泡の平均的な大きさが約5μm乃至約50μmであり、好ましくは約 5μm乃至約35μmであることを特徴とする、請求項1に記載のフオーム材料 。 3. 油中水形乳濁液を重合させることによって形成され、前記油中水形乳濁 液は、 1)油相を有し、この油相は、 a)i)好ましくは、スチレンを基材としたモノマー、及 びメタクリレートを基材としたモノマーからなる群から選択された実質的に水不 溶性の一官能価のガラス状モノマー、最も好ましくはスチレンを約5重量%乃至 約40重量%、好ましくは約10重量%乃至約30重量%、最も好ましくは約1 5重量%乃至約25重量%含み、 ii)好ましくは、n−ブチルアクリレート及び2−エチルヘキシルアクリレート からなる群から選択された実質的に水不溶性の一官能価のゴム状コモノマー、最 も好ましくは2−エチルヘキシルアクリレートを約30重量%乃至約80重量% 、好ましくは約50重量%乃至約70重量%、最も好ましくは約55重量%乃至 約65重量%含み、 iii)好ましくは、ジビニルベンゼン、ジビニルトルエン、及びジアリルフタレ ートからなる群から選択された実質的に水不溶性の多官能価架橋剤、最も好まし くはジビニルベンゼンを約10重量%乃至約40重量%、好ましくは約15重量 %乃至約25重量%含む、 モノマー成分の約67重量%乃至約98重量%、好ましくは約80重量%乃至 約95重量%を占める成分と、 b)油相に溶解性で安定した油中水形乳濁液を形成する、好ましくはソルビタ ンラウレートからなる乳化剤成分を約2重量%乃至約33重量%、好ましくは約 5重量%乃至約20重量%含み、 2)水溶性電解質、好ましくは塩化カルシウムを約0.2 重量%乃至約20重量%、約1重量%乃至約10重量%含む水相を更に有し、 3)水相の油相に対する重量比が約12:1乃至約100:1であり、好ましく は約20:1乃至約70:1である、油中水形乳濁液を重合させることによって 形成されることを特徴とする、請求項1又は2に記載のフォーム材料。 4. 水性の体液を吸収して保持するのに特に適した吸収体物品、好ましくは おむつにおいて、 I)好ましくは液体不透過性のバックシートと、 II)前記バックシートと前記物品の着用者の流体排出領域との間に位置決めさ れるように前記バックシートと関連した、請求項1乃至3のうちのいずれか一項 に記載のフォーム材料からなる吸収体コアと、 III)前記バックシートに接合された好ましくは液体透過性のトップシートとを 有し、前記吸収体コアが前記トップシートと前記バックシートとの間に位置決め されている、ことを特徴とする吸収体物品。 5. 前記フォーム材料は、 a)31.1OC(88OF)での乾燥フォーム材料1g当たりの自由吸収力が、合 成尿で少なくとも約12mLであり、好ましくは少なくとも約20mLであり、 b)37OCでの毛管作用による垂直方向移動速度は、前記合成尿が毛管作用でフ ォーム材料の5cmの垂直方向長さに沿って30分又はそれ以下、好ましくは5分 又はそれ 以下で移動する速度であり、 c)37OCでの毛管作用による垂直方向吸収力が、好ましくは、11.4cmの毛 管作用による垂直方向移動高さで、前記自由吸収力の少なくとも約75%である 、ことを特徴とする、請求項4に記載の吸収体物品。 6. 前記吸収体コアは、 (1)前記流体排出領域に位置決めされた、セルロース繊維、最も好ましくは化 学的に補剛したセルロース繊維からなる流体取扱い層、好ましくは流体捕捉/分 配層と、 (2)前記流体取扱い層と流体連通した、好ましくは前記捕捉/分配層の下にあ る、フォーム材料でできた流体貯蔵/再分配層とを有することを特徴とする、請 求項5又は6に記載の吸収体物品。 7. 潰れているが、膨張可能な吸収体ポリマーフオーム材料の形成方法であ って、 A)油中水形乳濁液を形成する工程を有し、この工程では、 a)i)好ましくは、スチレンを基材としたモノマー、及びメタクリレートを基 材としたモノマーからなる群から選択された実質的に水不溶性の一官能価のガラ ス状モノマー、最も好ましくはスチレンを約5重量%乃至約40重量%、好まし くは約10重量%乃至約30重量%、最も好ましくは約15重量%乃至約25重 量%含み、 ii)好ましくは、n−ブチルアクリレート及び2−エチ ルヘキシルアクリレートからなる群から選択された実質的に水不溶性の一官能価 のゴム状コモノマー、最も好ましくは2−エチルヘキシルアクリレートを約30 重量%乃至約80重量%、好ましくは約50重量%乃至約70重量%、最も好ま しくは約55重量%乃至約65重量%含み、 iii)好ましくは、ジビニルベンゼン、ジビニルトルエン、及びジアリルフタレ ートからなる群から選択された実質的に水不溶性の多官能価架橋剤、最も好まし くはジビニルベンゼンを約10重量%乃至約40重量%、好ましくは約15重量 %乃至約25重量%含む、 モノマー成分の約67重量%乃至約98重量%、好ましくは約80重量%乃至 約95重量%、及び b)油相に溶解性の、安定した油中水形乳濁液を形成する乳化剤成分を約2重 量%乃至約33重量%、好ましくは約5重量%乃至約20重量%含む、油相と、 2)水溶性電解質を約0.2重量%乃至約20重量%含む水溶液、好ましくは水 溶性遊離基重合開始剤を約0.02重量%乃至約0.4重量%更に含む水相とか らなり、 3)水相の油相に対する重量比が約12:1乃至約100:1であり、好ましく は約20:1乃至約70:1である、油相及び水相から油中水形乳濁液を形成し 、 B)油中水形乳濁液の油相中のモノマー成分を、好ましくは約30OC乃至約5 0OCの温度で約4時間乃至約24 時間に亘って、最も好ましくは、約35OC乃至約45OCの温度で約4時間乃至約 18時間に亘って重合させてポリマーフォーム材料を形成する工程と、 C)ポリマーフォーム材料を水性の体液との接触時に再び膨張する潰れたポリ マーフォーム材料が形成される所定の程度まで脱水する工程と、を有する、吸収 体ポリマーフォーム材料の形成方法において、 ポリマーフォーム材料の気泡の平均的な大きさが約50μm又はそれ以下であ るように、油中水形乳濁液内で形成される水滴の凝集を少なくするように、前記 乳濁液形成工程(A)及び前記重合工程(B)を実施する、形成方法。 8. 前記乳化剤構成要素は、ソルビタンラウレート及びポリグリセロールの 脂肪酸エステルを約10:1乃至約1:10の重量比で、好ましくは、約4:1 乃至1:1の重量比で有し、前記ポリグリセロールエステルは、(1)線状ジグ リセロールが少なくとも約60重量%、三価又はそれ以上のポリグリセロールが 約40重量%以下、及び環状ジグリセロールが約10重量%以下のポリグリセロ ール、(2)C12飽和脂肪酸及びC14飽和脂肪酸が少なくとも約40%、C16飽 和脂肪酸が約25重量%以下、C18又はこれ以上の飽和脂肪酸が約10%以下、 及びC10又はこれ以下の脂肪酸が約10%以下の脂肪酸組成を持つ脂肪酸反応体 、から得られ、(3)ポリグリ セロール(1)の脂肪酸反応体(2)に対する重量比が約50:50乃至約70 :30であることを特徴とする、請求項7に記載の方法。 9. 前記ポリグリセロールエステルは、(1)線状ジグリセロールが約60 重量%乃至約80重量%、トリグリセロール又はこれ以上のポリグリセロールが 約20重量%乃至約40重量%のポリグリセロール、(2)C12飽和脂肪酸及び C14飽和脂肪酸が少なくとも約65%、C16飽和脂肪酸が約15重量%以下、C 18又はこれ以上の飽和脂肪酸が約4%以下、及びC10又はこれ以下の脂肪酸が約 30%以下の脂肪酸組成を持つ脂肪酸反応体、から得られ、(3)ポリグリセロ ール(1)の脂肪酸反応体(2)に対する重量比が約60:40乃至約70:3 0であることを特徴とする、請求項7又は8に記載の方法。 10. 前記ポリグリセロールエステルは、50OCでの油/水界面張力を少な くとも約0.06dynes/cm、好ましくは約0.09dynes/cm乃至約03dynes/cm の最小値にすることを特徴とする、請求項7、8、又は9に記載の方法。
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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US07/989,270 | 1992-12-11 | ||
US07/989,270 US5387207A (en) | 1991-08-12 | 1992-12-11 | Thin-unit-wet absorbent foam materials for aqueous body fluids and process for making same |
US989,270 | 1992-12-11 | ||
PCT/US1993/011498 WO1994013704A1 (en) | 1992-12-11 | 1993-11-26 | Thin-until-wet absorbent foam materials for aqueous body fluids and process for making same |
Publications (2)
Publication Number | Publication Date |
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JPH08504474A true JPH08504474A (ja) | 1996-05-14 |
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EP (1) | EP0673393B1 (ja) |
JP (1) | JP3230582B2 (ja) |
KR (1) | KR950704364A (ja) |
CN (2) | CN1182819C (ja) |
AT (1) | ATE176245T1 (ja) |
AU (1) | AU693773B2 (ja) |
BR (1) | BR9307630A (ja) |
CA (1) | CA2151279C (ja) |
CZ (1) | CZ291855B6 (ja) |
DE (1) | DE69323324T2 (ja) |
DK (1) | DK0673393T3 (ja) |
EG (1) | EG20487A (ja) |
ES (1) | ES2126738T3 (ja) |
FI (1) | FI112493B (ja) |
HK (1) | HK1013083A1 (ja) |
HU (1) | HU219869B (ja) |
MA (1) | MA23052A1 (ja) |
MX (1) | MX9307847A (ja) |
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NO (1) | NO952055D0 (ja) |
NZ (1) | NZ258765A (ja) |
PE (1) | PE5595A1 (ja) |
SA (1) | SA94140596B1 (ja) |
SG (1) | SG54169A1 (ja) |
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WO (1) | WO1994013704A1 (ja) |
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1993
- 1993-02-09 EG EG78293A patent/EG20487A/xx active
- 1993-11-26 DE DE69323324T patent/DE69323324T2/de not_active Expired - Lifetime
- 1993-11-26 KR KR1019950702394A patent/KR950704364A/ko not_active Application Discontinuation
- 1993-11-26 NZ NZ258765A patent/NZ258765A/xx unknown
- 1993-11-26 JP JP51420894A patent/JP3230582B2/ja not_active Expired - Fee Related
- 1993-11-26 AT AT94902427T patent/ATE176245T1/de not_active IP Right Cessation
- 1993-11-26 WO PCT/US1993/011498 patent/WO1994013704A1/en active IP Right Grant
- 1993-11-26 HU HU9501689A patent/HU219869B/hu unknown
- 1993-11-26 DK DK94902427T patent/DK0673393T3/da active
- 1993-11-26 ES ES94902427T patent/ES2126738T3/es not_active Expired - Lifetime
- 1993-11-26 EP EP94902427A patent/EP0673393B1/en not_active Expired - Lifetime
- 1993-11-26 CZ CZ19951402A patent/CZ291855B6/cs not_active IP Right Cessation
- 1993-11-26 AU AU56803/94A patent/AU693773B2/en not_active Ceased
- 1993-11-26 CA CA002151279A patent/CA2151279C/en not_active Expired - Fee Related
- 1993-11-26 BR BR9307630-4A patent/BR9307630A/pt not_active IP Right Cessation
- 1993-11-26 SG SG1996003043A patent/SG54169A1/en unknown
- 1993-12-06 MY MYPI93002607A patent/MY110905A/en unknown
- 1993-12-09 MA MA23360A patent/MA23052A1/fr unknown
- 1993-12-10 MX MX9307847A patent/MX9307847A/es unknown
- 1993-12-10 PE PE1993232845A patent/PE5595A1/es not_active Application Discontinuation
- 1993-12-11 CN CNB991187318A patent/CN1182819C/zh not_active Expired - Fee Related
- 1993-12-11 CN CN93121142A patent/CN1054858C/zh not_active Expired - Fee Related
- 1993-12-13 TR TR01167/93A patent/TR28238A/xx unknown
- 1993-12-28 TW TW082111069A patent/TW309433B/zh active
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1994
- 1994-03-06 SA SA94140596A patent/SA94140596B1/ar unknown
- 1994-11-18 US US08/342,069 patent/US5652194A/en not_active Expired - Lifetime
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1995
- 1995-05-24 NO NO952055A patent/NO952055D0/no unknown
- 1995-06-09 FI FI952854A patent/FI112493B/fi not_active IP Right Cessation
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1998
- 1998-12-21 HK HK98114384A patent/HK1013083A1/xx not_active IP Right Cessation
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