EP0198683A2
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EP
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Absorbent structures
Assignee: Procter and Gamble European Technical Center
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Filing: 1986-04-11
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Granted: —
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Expires: 2006-04-11
Abstract
Abstract Absorbent structures comprising a continuous matrix of hydrophilic fibers, having dispersed therein particles of a water-insoluble hydrogel, are disclosed. The distribution of hydrogel particles is showed toward the back face of the structure, resulting in the back face half containing at least 60% of the hydrogel material.
Inventors
- 👤 Elisabeth Hendrika Duenk
- 👤 Walter Jakob Fischer
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 17:15
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/534; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/60; A61F2013/530131; A61F2013/530481; A61F2013/53051; A61F2013/530532; A61F2013/530569; A61F2013/530583; A61F2013/530613; A61F2013/53062; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/24992; Y10T428/25
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
49 words
An absorbent structure having a top face and a back face and comprising a continuous matrix of hydrophilic fibers having dispersed therein discrete particles of a water-insoluble hydrogel, characterized in that the back face half of the absorbent structure contains at least 60 % of the water-insoluble hydrogel material.
Claim 2
Dependent Claim
49 words
An absorbent structure having a top face and a back face and comprising a continuous matrix of hydrophilic fibers having dispersed therein discrete particles of a water-insoluble hydrogel, characterized in that the back face half of the absorbent structure contains at least 60 % of the water-insoluble hydrogel material.
Claim 3
Dependent Claim
23 words
An absorbent structure according to claim 1 comprising from 3 % to 40 %, by dry weight of the structure, of water-insoluble hydrogel.
Claim 4
Dependent Claim
38 words
An absorbent structure according to claim 1 and 2 wherein the water-insoluble hydrogel is selected from the group consisting of hydrolyzed acrylonitrile grafted starch, acrylic acid grafted starch, polyacrylates, copolymers of isobutylene and maleic anhydride, and mixtures thereof.
Claim 5
Dependent Claim
26 words
An absorbent structure according to any of the preceding claims wherein the hydrogel particles have an average particle size of from 30 micrometer to 4 mm
Claim 6
Dependent Claim
21 words
An absorbent structure according to any of the preceding claims wherein the hydrophilic fibers are cellulosic fibers, preferably wood pulp fibers.
Claim 7
Dependent Claim
25 words
An absorbent structure according to any of the preceding claims wherein the back face half contains at least 70 % of the water-insoluble hydrogel material.
Claim 8
Dependent Claim
25 words
An absorbent structure according to any of the preceding claims comprising from 8 % to 20 %, by weight of the structure, of water-insoluble hydrogel.
Claim 9
Dependent Claim
31 words
An absorbent structure according to any of the preceding claims wherein the back face half of the structure contains from 75 % to 100 % of the total amount of hydrogel.
Claim 10
Dependent Claim
24 words
An absorbent structure according to any of the preceding claims having a thin area of low hydrogel concentration immediately adjacent to the back face.
Claim 11
Dependent Claim
56 words
A dissposable diaper or catamenial product comprising: (a) a liquid impervious backing sheet; (b) a hydrophobic, liquid pervious top sheet; and (c) an absorbent structure according to any of the preceding claims, wherein the backing sheet overlays the back face of the absorbent structure and the top sheet overlays the top face of the absorbent structure.
References Cited (Backward Citations)
No citation records indexed.
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