US5098775A
Expired / Lapsed
US
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Body fluid-absorbing article
Assignee: Nippon Shokubai Co Ltd
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Filing: 1990-03-26
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Granted: 1992-03-24
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Expires: 2010-03-26
Abstract
Abstract In a body fluid-absorbing article composed of a liquid-permeable front-surface member, a liquid-impermeable rear-surface member, and a fibrous absorbent member nipped therebetween and adapted to be used with the front-surface member held in contact with the human body, by the improvement having disposed in half of the thickness of the absorbent member on the front-surface member side an absorbent composite (A) obtained by applying an ethylenically unsaturated monomer capable of forming an absorbent polymer by polymerization or an aqueous solution of the monomer to a fibrous web and thereafter polymerizing the monomer.
Inventors
- 👤 Nobuyuki Harada
- 👤 Yoshihiro Motono
- 👤 Kazumasa Kimura
- 👤 Tadao Shimomura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:39
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/534; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/50; A61L15/60; C; C08; C08L; C08L33/00; C08L33/04; C08L33/14; C08L41/00; Y; Y10; Y10T; Y10T442/00; Y10T442/30; Y10T442/3472; Y10T442/3602; Y10T442/365; Y10T442/3707; Y10T442/3724; Y10T442/3756; Y10T442/3854; Y10T442/3886; Y10T442/40; Y10T442/60; Y10T442/659; Y10T442/673; Y10T442/674; Y10T442/678
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
109 words
In a body fluid-absorbing article composed of a liquid-permeable front-surface member, a liquid impermeable, rear-surface member and a fibrous absorbent member nipped therebetween and adopted to be used with said front-surface member held in contact with the human body, by the improvement having disposed substantially only in the half of the thickness of said absorbent member on the front-surface member side an absorbent composite (a) obtained by applying an ethylenically unsaturated monomer capable of forming an absorbent polymer by polymerization of an aqueous solution of said monomer to a fibrous web and thereafter polymerizing the monomer, provided said absorbent composite is out of contact with said front surface member.
Claim 2
Dependent Claim
109 words
In a body fluid-absorbing article composed of a liquid-permeable front-surface member, a liquid impermeable, rear-surface member and a fibrous absorbent member nipped therebetween and adopted to be used with said front-surface member held in contact with the human body, by the improvement having disposed substantially only in the half of the thickness of said absorbent member on the front-surface member side an absorbent composite (a) obtained by applying an ethylenically unsaturated monomer capable of forming an absorbent polymer by polymerization of an aqueous solution of said monomer to a fibrous web and thereafter polymerizing the monomer, provided said absorbent composite is out of contact with said front surface member.
Claim 3
Dependent Claim
32 words
An article according to claim 1, wherein said ethylenically unsaturated monomer is at least one member selected from the group consisting of carboxyl group-containing monomers, sulfonic acid group-containing monomers, and salts thereof.
Claim 4
Dependent Claim
20 words
An article according to claim 1, wherein said absorbent member comprises said absorbent composite (A) and a fibrous absorbent material.
Claim 5
Dependent Claim
27 words
An article according to claim 3, wherein said fibrous absorbent material is at least one member selected from the group consisting of fibrous pulp and absorbent paper.
Claim 6
Dependent Claim
37 words
An article according to claim 2, wherein said carboxyl group-containing monomer or a salt thereof is at least one member selected from the group consisting of acrylic acid, methacrylic acid, maleic aid, maleic anhydride, and salts thereof.
Claim 7
Dependent Claim
33 words
An article according to claim 2, wherein said carboxyl group-containing monomer or a salt thereof is at least one member selected from the group consisting of acrylic acid, methacrylic acid, and salts thereof.
Claim 8
Dependent Claim
38 words
An article according to claim 2, wherein said sulfonic acid group-containing monomer or a salt thereof is at least one member selected from the group consisting of 2-acrylamide-2-methylpropanesulfonic acid, 2-(meth)acryloyloxyethanesulfonic acid, 2-(meth)acryloyloxypropanesulfonic acid, vinylsulfonic acids, and salts thereof.
Claim 9
Dependent Claim
147 words
In a body fluid-absorbing article composed of a liquid-permeable front-surface member, a liquid-impermeable rear-surface member, and a fibrous absorbent member nipped therebetween and adapted to be used with said front-surface member held in contact with the human body, by the improvement having disposed substantially only in the half of the thickness of said absorbent member on the front-surface member side an absorbent composite (A) obtained by applying an ethylenically unsaturated monomer capable of forming an absorbent polymer by polymerization of an aqueous solution of said monomer to a fibrous web and thereafter polymerizing the monomer, and having disposed substantially only in the half of the thickness of said absorbent member on the rear-surface member side a powdery absorbent polymer (B), provided said absorbent composite is out of contact with said front surface member and said powdery absorbent polymer is out of contact with said rear surface member.
Claim 10
Dependent Claim
147 words
In a body fluid-absorbing article composed of a liquid-permeable front-surface member, a liquid-impermeable rear-surface member, and a fibrous absorbent member nipped therebetween and adapted to be used with said front-surface member held in contact with the human body, by the improvement having disposed substantially only in the half of the thickness of said absorbent member on the front-surface member side an absorbent composite (A) obtained by applying an ethylenically unsaturated monomer capable of forming an absorbent polymer by polymerization of an aqueous solution of said monomer to a fibrous web and thereafter polymerizing the monomer, and having disposed substantially only in the half of the thickness of said absorbent member on the rear-surface member side a powdery absorbent polymer (B), provided said absorbent composite is out of contact with said front surface member and said powdery absorbent polymer is out of contact with said rear surface member.
Claim 11
Dependent Claim
32 words
An article according to claim 8, wherein said ethylenically unsaturated monomer is at least one member selected from the group consisting of carboxyl group-containing monomers, sulfonic acid group-containing monomers, and salts thereof.
Claim 12
Dependent Claim
25 words
An article according to claim 8, wherein said absorbent member comprises said absorbent composite (A), said powdery absorbent polymer (B) and a fibrous absorbent material.
Claim 13
Dependent Claim
27 words
An article according to claim 10, wherein said fibrous absorbent material is at least one member selected from the group consisting of fibrous pulp and absorbent paper.
Claim 14
Dependent Claim
37 words
An article according to claim 9, wherein said carboxyl group-containing monomer or a salt thereof is at least one member selected from the group consisting of acrylic acid, methacrylic acid, maleic acid, maleic anhydride, and salts thereof.
Claim 15
Dependent Claim
33 words
An article according to claim 9, wherein said carboxyl group-containing monomer or a salt thereof is at least one member selected from the group consisting of acrylic acid, methacrylic acid, and salts thereof.
Claim 16
Dependent Claim
38 words
An article according to claim 9, wherein said sulfonic acid group-containing monomer or a salt thereof is at least one member selected from the group consisting of 2-acrylamide-2-methylpropanesulfonic acid, 2-(meth)acryloyloxyethanesulfonic acid, 2-(meth)acryloyloxypropanesulfonic acid, vinylsulfonic acids, and salts thereof.
Claim 17
Dependent Claim
25 words
An article according to claim 8, wherein an average particle size of said absorbent polymer (B) is in the range of 0.05 to 1.0 mm.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-24 | 1995-09-23 | 1996-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-24 | 1999-09-23 | 2000-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-24 | 2003-09-23 | 2004-03-24 | $7700.00 | Window Closed / Lapsed |