EP0108637B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Superthin absorbent product
Assignee: Personal Products Co
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Filing: 1983-11-07
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Granted: 1989-01-18
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Expires: 2003-11-07
Abstract
No abstract record available.
Inventors
- 👤 Heinz A. Pieniak
- 👤 Michael James Iskra
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 18:55
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/10; A; A61; A61F; A61F13/00; A61F13/15; A61F13/20; A61F13/2051; A61F13/206; A61F13/53; A61F13/534; A61F13/537; A61F13/53708; A61F13/53717; A61F13/53743; A61F13/53756; B32B5/00; B32B5/02; B32B5/022; B32B5/22; B32B5/24; B32B5/26; A61F13/2002; A61F13/202; A61F13/56; A61F13/58; A61F2013/15008; A61F2013/15048; A61F13/51; A61F13/514; A61F13/51401; A61F2013/51409; A61F2013/530131; A61F2013/530226; A61F2013/530299; A61F2013/530306; A61F2013/530335; A61F2013/530379; A61F2013/53043; A61F2013/530481; A61F2013/530489; A61F2013/530496; A61F2013/583; B32B2250/00; B32B2250/40; B32B2262/00; B32B2262/02; B32B2262/0276; B32B2432/00; B32B2555/00; B32B2555/02
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
232 words
An absorbent compressed composite comprising: a first fibrous layer (12) having a given thickness dimension in uncompressed form; a water-insoluble but water-swellable polymeric superabsorbent material (16) which is capable of absorbing water in an amount which is at least 10 times the weight of the material in its dry form, within said first layer (12) and which holds said first layer (12) in a compressed form with a thickness dimension less than said given thickness dimension; and a second layer (14) on said first layer (12), with parts of said second layer (14) extending into and becoming spacially integral with said first layer (12) to provide a transition zone; said second layer (14) having no superabsorbent material therewithin and being denser than said first layer (12) prior to the incorporation of the superabsorbent material (16) therein whereby liquid wetted on said composite wicks faster along the surface of said second layer (14) than along the surface of said first layer (12), and liquid wetted upon said composite (10) in a given area is transported in said second layer (14) away from said given area and distributed to portions of said first layer (12) remote from said given area, said superabsorbent material (16) upon swelling releasing its hold on said first layer, thus permitting said first layer (12) to expand from said compressed form upon absorption of liquid in said superabsorbent material (16).
Claim 2
Dependent Claim
232 words
An absorbent compressed composite comprising: a first fibrous layer (12) having a given thickness dimension in uncompressed form; a water-insoluble but water-swellable polymeric superabsorbent material (16) which is capable of absorbing water in an amount which is at least 10 times the weight of the material in its dry form, within said first layer (12) and which holds said first layer (12) in a compressed form with a thickness dimension less than said given thickness dimension; and a second layer (14) on said first layer (12), with parts of said second layer (14) extending into and becoming spacially integral with said first layer (12) to provide a transition zone; said second layer (14) having no superabsorbent material therewithin and being denser than said first layer (12) prior to the incorporation of the superabsorbent material (16) therein whereby liquid wetted on said composite wicks faster along the surface of said second layer (14) than along the surface of said first layer (12), and liquid wetted upon said composite (10) in a given area is transported in said second layer (14) away from said given area and distributed to portions of said first layer (12) remote from said given area, said superabsorbent material (16) upon swelling releasing its hold on said first layer, thus permitting said first layer (12) to expand from said compressed form upon absorption of liquid in said superabsorbent material (16).
Claim 3
Dependent Claim
81 words
The compressed composite of claim 1, wherein: the first layer (12) has a dry bulk recovery of at least 30%, an initial dry bulk of at least 20 cc/g, and a weight of less than 68 g.m- 2 (2 oz.yd-Z); the second layer (14) comprises particles consisting of cellulosic fibers, peat moss, rayon fibers or mixtures thereof; and the amount of superabsorbent material (16) present is at least 200% dry weight basis (based on said first web (12) dry weight basis).
Claim 4
Dependent Claim
23 words
The compressed composite of claim 1 or claim 2, wherein the superabsorbent material (16) is present as a plurality of particles or globules.
Claim 5
Dependent Claim
28 words
The compressed composite of any one of claims 1 to 3, wherein the superabsorbent material (16) is present in an amount of 200 to 1500% dry weight basis.
Claim 6
Dependent Claim
25 words
The compressed composite of claim 4 wherein said superabsorbent material (16) is present in an amount from 400 percent to 1,200 percent dry weight basis.
Claim 7
Dependent Claim
21 words
The compressed composite of any one of claims 1 to 5, wherein said first layer (12) is a nonwoven fibrous web.
Claim 8
Dependent Claim
15 words
The compressed composite of claim 6, wherein the web (12) is of synthetic staple fibers.
Claim 9
Dependent Claim
18 words
The compressed composite of claim 6 or claim 7 wherein the nonwoven web (12) is of polyester fibers.
Claim 10
Dependent Claim
22 words
The compressed composite of any one of claims 1 to 8 wherein said second layer (14) is chemically delignified wood pulp fibers.
Claim 11
Dependent Claim
19 words
The compressed composite of any one of claims 1 to 8 wherein said second layer (14) is peat moss.
Claim 12
Dependent Claim
19 words
The absorbent composite of any one of claims 1 to 8 wherein said second layer (14) is rayon fibers.
Claim 13
Dependent Claim
23 words
A disposable diaper (30) containing an absorbent pad (33) which is a compressed composite according to any one of claims 1 to 11.
Claim 14
Dependent Claim
22 words
The disposable diaper of claim 12 wherein said absorbent pad is comprised of two or more absorbent compressed composites (33, 34, 35).
Claim 15
Dependent Claim
18 words
The disposable diaper of claim 12, wherein in said composite first layer is sandwiched between two second layers.
Claim 16
Dependent Claim
37 words
A sanitary napkin comprising an absorbent structure partially encompassed by a liquid barrier (54) with a moisture-permeable overwrap (42), wherein the absorbent structure (55) comprises a compressed composite according to any one of claims 1 to 11.
Claim 17
Dependent Claim
31 words
The sanitary napkin of claim 15 wherein said absorbent structure comprises two compressed composites (53, 55) superimposed one upon the other with the absorbing layers (57, 59) immediately adjacent one another.
Claim 18
Dependent Claim
19 words
A tampon having as its adsorbent portion a compressed composite according to any one of claims 1 to 11.
Claim 19
Dependent Claim
18 words
The tampon of claim 17, wherein in said composite the first layer is sandwiched between two second layers.
Claim 20
Dependent Claim
15 words
A wipe comprising a compressed composite according to any one of claims 1 to 11.
Claim 21
Independent Claim
57 words
A method for forming an absorbent compressed composite according to any one of claims 1 to 11 comprising; forming a fibrous web; interspersing therein superabsorbent material to form an absorbing layer; contacting a wicking layer with one surface of said absorbing layer and compressing said layers sufficiently to reduce the thickness thereof by at least 50 percent.
References Cited (Backward Citations)
No citation records indexed.
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