EP0325416A2
Expired / Lapsed
EP
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Absorbent members having low density and basis weight acquisition zones and absorbent articles incorporating such members
Assignee: Procter and Gamble Co
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Filing: 1989-01-18
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Granted: —
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Expires: 2009-01-18
Abstract
Abstract An absorbent article wherein the deposition region (54) of its absorbent member (42) comprises a storage zone (58) and an acquisition zone (56) having a lower average density and a lower average basis weight per unit area than the storage zone (58). The acquisition zone (56) is positioned toward the front of either the absorbent member (42) or the absorbent article so that the acquisition zone (56) may most effectively and efficiently rapidly acquire discharged liquids. The absorbent member (42) comprises a mixture of hydrophilic fibrous material and discrete particles of absorbent gelling material having a particular size distribution so as to enhance the absorbent capacity and acquisition rate of the absorbent member (42). The particles of absorbent gelling material are selected to have a mass median particle size greater than or equal to about 400 microns with the amounts of very large and very small particles preferably kept below certain minimum concentrations.
Inventors
- 👤 Charles John Berg
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 14:29
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/531; A61F13/532; A61F13/533; A61F13/534; A61F13/535; A61F13/537; A61F13/53708; A61F13/53717; A61F13/53743; A61F13/53747; A61F13/53752; A61F13/15203; A61F2013/15284; A61F2013/15422; A61F2013/15487; A61F2013/15536; A61F2013/530481; A61F2013/530489; A61F2013/53051; A61F2013/530525; A61F2013/530569; A61F2013/530708; A61F2013/530868; A61F2013/530897; A61F2013/530905; A61F2013/530927; A61F2013/530934
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
100 words
An absorbent member comprising: a back section; a front section contiguous with said back section, said front section having an end region and a deposition region contiguous with said end region, said deposition region comprising a storage zone and an acquisition zone in liquid communication with said storage zone, said acquisition zone having a lower average density and a lower average basis weight than said storage zone; and a mixture of hydrophilic fibrous material and discrete particles of absorbent gelling material, said particles of absorbent gelling material having a mass median particles size ranging from 400 micrometers to 1680 micrometers.
Claim 2
Dependent Claim
100 words
An absorbent member comprising: a back section; a front section contiguous with said back section, said front section having an end region and a deposition region contiguous with said end region, said deposition region comprising a storage zone and an acquisition zone in liquid communication with said storage zone, said acquisition zone having a lower average density and a lower average basis weight than said storage zone; and a mixture of hydrophilic fibrous material and discrete particles of absorbent gelling material, said particles of absorbent gelling material having a mass median particles size ranging from 400 micrometers to 1680 micrometers.
Claim 3
Dependent Claim
44 words
An absorbent member according to claim 1 wherein no more than 16% by weight of said particles have a particle size less than 200 micrometers, and preferably no more than 16% by weight of said particles have a particle size less than 210 micrometers.
Claim 4
Dependent Claim
32 words
An absorbent member according to either one of claims 1 and 2 wherein said particles of absorbent gelling material have a mass median particles size ranging from 400 micrometers to 1410 micrometers.
Claim 5
Dependent Claim
47 words
An absorbent member according to any one of claims 1-3 wherein no more than 16% by weight of said particles have a particle size greater than 1410 micrometers, and preferably no more than 16% by weight of said particles have a particle size greater than 1190 micrometers.
Claim 6
Dependent Claim
30 words
An absorbent member according to any one of claims 1-4 wherein said particles of absorbent gelling material have a mass median particle size greater than or equal to 500 micrometers.
Claim 7
Dependent Claim
34 words
An absorbent member according to claim 1 wherein said particles of absorbent gelling material have a mass median particle size ranging from 841 micrometers to 1680 micrometers, preferably from 841 micrometers to 1410 micrometers.
Claim 8
Dependent Claim
27 words
An absorbent member according to claim 6 wherein said particles of absorbent gelling material have a mass median particle size ranging from 841 micrometers to 1190 micrometers.
Claim 9
Dependent Claim
42 words
An absorbent member according to any one of claims 1-7 wherein said acquisition zone is completely positioned within said deposition region, comprises less than 35% of the top surface area of said front section, and is transversely centered within said deposition region.
Claim 10
Dependent Claim
20 words
An absorbent member according to claim 8 wherein the top surface area of said acquisition zone has a triangular shape.
Claim 11
Dependent Claim
18 words
An absorbent member according to claim 9 wherein the top surface area of said acquisition zone is fox-shaped.
Claim 12
Dependent Claim
38 words
An absorbent member according to any one of claims 8-10 wherein said storage zone and said acquisition zone extend through only a fraction of the total thickness of the absorbent member so as to form a dusting layer.
Claim 13
Dependent Claim
22 words
An absorbent member according to claim 11 wherein said dusting layer and said acquisition zone have the same density and basis weight.
Claim 14
Dependent Claim
27 words
An absorbent member according to either one of claims 11 and 12 wherein both said dusting layer and said acquisition zone consist essentially of hydrophilic fibrous material.
Claim 15
Dependent Claim
21 words
An absorbent member according to any one of claims 11-13 wherein said storage zone is positioned only in said front section.
Claim 16
Dependent Claim
33 words
An absorbent member according to any one of claims 6-14 wherein from 0% to 20% preferably from 0% to 5% by weight of said particles have a particle size less than 841 micrometers.
Claim 17
Dependent Claim
34 words
An absorbent article comprising: a liquid pervious topsheet a liquid impervious backsheet associated with said topsheet; and an absorbent member according to any one of claims 1-15 positioned between said topsheet and said backsheet.
Claim 18
Dependent Claim
54 words
An absorbent article according to claim 16 having a front waistband region, a back waistband region and a crotch region, the acquisition zone of said absorbent member being positioned with respect to the absorbent article such that the top surface area of said acquisition zone is at least partially positioned in said crotch region.
Claim 19
Dependent Claim
21 words
An absorbent article according to claim 17, additionally comprising an absorbent acquisition core positioned between said topsheet and said absorbent member.
Claim 20
Dependent Claim
75 words
An absorbent article according to claim 18, wherein said absorbent member is generally oblong and has a top surface area that is from 0.25 to 1.0 times that of said absorbent acquisition core, said absorbent member being positioned relative to said backsheet and said absorbent acquisition core in a manner such that at least 75% of the absorbent gelling material in said absorbent member is found within the front two-thirds portion of the absorbent article.
References Cited (Backward Citations)
No citation records indexed.
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