Patent US5496626A successfully refreshed from Google Patents.
US5496626A
Expired / Lapsed
US
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Absorbent paper and absorbent article provided therewith
Assignee: Kao Corp
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Filing: 1994-04-01
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Granted: 1996-03-05
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Expires: 2014-04-01
Abstract
Abstract An absorbent paper comprising a base layer, which is obtained by paper-sheeting a material containing a highly bulky cellulose fiber, and a surface layer being located on the base layer, which is obtained by paper-sheeting a material containing a highly bulky cellulose fiber, is disclosed. Further, an absorbent article wherein the absorbent paper is used as an absorbent is also disclosed.
Inventors
- 👤 Mitsugu Hamajima
- 👤 Minoru Nakanishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:01
CPC Classifications
D; D21; D21H; D21H27/00; D21H27/30; D21H27/38; A; A61; A61F; A61F13/00; A61F13/15; A61F13/15577; A61F13/15617; A61F13/15634; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/28; D21H11/00; D21H11/16; D21H11/20; Y; Y10; Y10S; Y10S428/00; Y10S428/903; Y10S428/913; Y10T; Y10T428/00; Y10T428/13; Y10T428/24; Y10T428/24355; Y10T428/24446; Y10T428/24455; Y10T428/24463; Y10T428/29; Y10T428/2913; Y10T428/2973; Y10T442/00; Y10T442/60; Y10T442/608; Y10T442/609; Y10T442/614; Y10T442/619; Y10T442/621; Y10T442/659; Y10T442/668; Y10T442/693
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
106 words
In an absorbent article comprising a liquid-permeable surface material, a liquid-retaining absorbent and a liquid-impermeable leakproof material, the improvement wherein said liquid-retaining absorbent comprises an absorbent paper and a high-absorbent polymer, wherein said absorbent paper comprises: a base layer comprising a material containing from 20 to 80% by weight of a highly bulky cellulose fiber and from 80 to 20% by weight of a hydrophilic microfiber, and a surface layer which is located on said base layer and comprises a material containing from 50 to 98% by weight of a highly bulky cellulose fiber and from 2 to 30% by weight of a hot-melt adhesive fiber.
Claim 2
Dependent Claim
106 words
In an absorbent article comprising a liquid-permeable surface material, a liquid-retaining absorbent and a liquid-impermeable leakproof material, the improvement wherein said liquid-retaining absorbent comprises an absorbent paper and a high-absorbent polymer, wherein said absorbent paper comprises: a base layer comprising a material containing from 20 to 80% by weight of a highly bulky cellulose fiber and from 80 to 20% by weight of a hydrophilic microfiber, and a surface layer which is located on said base layer and comprises a material containing from 50 to 98% by weight of a highly bulky cellulose fiber and from 2 to 30% by weight of a hot-melt adhesive fiber.
Claim 3
Dependent Claim
16 words
An absorbent article of claim 1, wherein said absorbent paper is wrapped around said high-absorbent polymer.
Claim 4
Dependent Claim
16 words
The absorbent article of claim 1, wherein said highly bulky cellulose fiber is a crosslinked fiber.
Claim 5
Dependent Claim
26 words
The absorbent article of claim 1, wherein said highly bulky cellulose fiber has a fiber cross section area (W) of 3.0×10 6 cm 2 or above.
Claim 6
Dependent Claim
23 words
The absorbent article of claim 1, wherein said highly bulky cellulose fiber has a deviation from circular form (O) of 0.5 or above.
Claim 7
Dependent Claim
82 words
The absorbent article of claim 1, wherein said surface layer has an absorption height to physiological saline by Klemm's method after 1 minute of from 20 to 80 mm and an absorption height by Klemm's method after 10 minutes of from 30 to 120 mm and said base layer has an absorption height to physiological saline by Klemm's method after 1 minute of 50 mm or above and an absorption height by Klemm's method after 10 minutes of 100 mm or above.
Claim 8
Dependent Claim
30 words
The absorbent article of claim 1, wherein the absorption heights after 1 and 10 minutes of said base layer are higher respectively than the corresponding ones of the surface layer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-03-05 | 1999-09-04 | 2000-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-03-05 | 2003-09-04 | 2004-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-03-05 | 2007-09-04 | 2008-03-05 | $7700.00 | Window Closed / Lapsed |