Patent US2834422A successfully refreshed from Google Patents.
US4289130A
Expired / Lapsed
US
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Absorbent material for sanitary products
Assignee: Daicel Corp
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Filing: 1979-08-21
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Granted: 1981-09-15
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Expires: 1999-08-21
Abstract
Abstract An absorbent material comprising cellulose acetate fibers has a good capacity to absorb water and a slow speed of water absorption, so that it can be successfully used to make sanitary products such as disposable diapers and sanitary napkins. The sanitary products prepared with the absorbent material provide improved comfortableness and leakproof properties.
Inventors
- 👤 Akira Usami
- 👤 Toshiaki Uebayashi
- 👤 Koji Sato
- 👤 Tomoko Goda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:46
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/28; A61F13/534; A61F2013/530131; A61F2013/530138; A61F2013/530153; A61F2013/53016; A61F2013/53445; A61F13/84; A61F2013/8488; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2973; Y10T428/298; Y10T442/00; Y10T442/60; Y10T442/608; Y10T442/609; Y10T442/611; Y10T442/659; Y10T442/668
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
79 words
In a sanitary product having a multilayered structure comprising a covering layer suitable for contact with the human body, a liquid excretion-leakproof layer and an absorbent layer interposed between the covering layer and the liquid excretion-leakproof layer, the improvement comprising employing as the absorbent layer, a layer of cellulose acetate fibers or a mixture of cellulose acetate fibers and cellulose fibers, the cellulose acetate fibers having an irregular cross-section and having a filament denier of less than 8 deniers.
Claim 2
Dependent Claim
79 words
In a sanitary product having a multilayered structure comprising a covering layer suitable for contact with the human body, a liquid excretion-leakproof layer and an absorbent layer interposed between the covering layer and the liquid excretion-leakproof layer, the improvement comprising employing as the absorbent layer, a layer of cellulose acetate fibers or a mixture of cellulose acetate fibers and cellulose fibers, the cellulose acetate fibers having an irregular cross-section and having a filament denier of less than 8 deniers.
Claim 3
Dependent Claim
28 words
The sanitary product according to claim 1, comprising about 100 parts by weight of cellulose acetate fibers and about 900 to 0 parts by weight of cellulose fibers.
Claim 4
Dependent Claim
20 words
The sanitary product according to claim 1, in which the cellulose acetate fibers consist of crimped filament tow opened homogeneously.
Claim 5
Dependent Claim
18 words
The sanitary product according to claim 1, in which the acetate fibers consist of web of staple fibers.
Claim 6
Dependent Claim
16 words
The sanitary product according to claim 1, in which the acetate fibers have Y-shaped cross section.
Claim 7
Dependent Claim
22 words
The sanitary product according to claim 1, in which the acetate fibers consist of fibers recovered from filter rods for cigarette filters.
Claim 8
Dependent Claim
17 words
The sanitary product according to claim 1, comprising mixed webs of staple acetate fibers and cellulose fibers.
Claim 9
Dependent Claim
25 words
The sanitary product according to claim 1, comprising a multi-layer structure of a layer of the acetate fibers and a layer of the cellulose fibers.
Claim 10
Dependent Claim
12 words
A sanitary product according to claim 1 which is a disposable diaper.
Claim 11
Dependent Claim
12 words
A sanitary product according to claim 1 which is a sanitary napkin.
Claim 12
Dependent Claim
76 words
In a sanitary product having a multilayered structure comprising a covering layer suitable for contact with the human body, a liquid excretion-leakproof layer and an absorbent layer interposed between the covering layer and the liquid excretion-leakproof layer, the improvement wherein the absorbent layer is a plurality of layers, at least one of which consists of cellulose acetate fibers, the cellulose acetate fibers having an irregular cross-section and having a filament denier of less than 8 deniers.
Claim 13
Dependent Claim
76 words
In a sanitary product having a multilayered structure comprising a covering layer suitable for contact with the human body, a liquid excretion-leakproof layer and an absorbent layer interposed between the covering layer and the liquid excretion-leakproof layer, the improvement wherein the absorbent layer is a plurality of layers, at least one of which consists of cellulose acetate fibers, the cellulose acetate fibers having an irregular cross-section and having a filament denier of less than 8 deniers.
References Cited (Backward Citations)
US2543101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-14 | 1985-03-16 | 1985-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-14 | 1989-03-16 | 1989-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-14 | 1993-03-16 | 1993-09-15 | $7700.00 | Window Closed / Lapsed |