US3939836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water dispersible nonwoven fabric
Assignee: Johnson and Johnson
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Filing: 1974-02-07
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Granted: 1976-02-24
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Expires: 1994-02-07
Abstract
Abstract A water dispersible nonwoven fabric comprising one or more layers of overlapping, intersecting fibers and from about 4 percent to about 35 percent by weight of a binder comprising an alkali salt of a sulfated cellulose ester, said nonwoven fabric having good tensile strength and abrasion resistance in the presence of body fluids such as urine, blood, and menstrual fluid. The nonwoven fabrics may be incorporated in body fluid absorbent products such as sanitary napkins, diapers, surgical dressings, tampons, nursing pads and the like.
Inventors
- 👤 Deger C. Tunc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:10
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/62; A61L15/22; A61L15/28; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24826; Y10T442/00; Y10T442/60; Y10T442/608
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
68 words
A water-dispersible nonwoven fabric comprising: a layer of overlapping, intersecting fibers, said fibers having a length not more than about 2 inches; and from about 4 to about 35 percent by weight of the fabric of an alkali salt of a sulfated cellulose ester resin binder distributed in said fabric, said resin binder having an average of from about 0.1 to about 0.45 sulfate groups per anhydroglucose unit.
Claim 2
Dependent Claim
68 words
A water-dispersible nonwoven fabric comprising: a layer of overlapping, intersecting fibers, said fibers having a length not more than about 2 inches; and from about 4 to about 35 percent by weight of the fabric of an alkali salt of a sulfated cellulose ester resin binder distributed in said fabric, said resin binder having an average of from about 0.1 to about 0.45 sulfate groups per anhydroglucose unit.
Claim 3
Dependent Claim
29 words
A water-dispersible nonwoven fabric according to claim 1, wherein said sulfated cellulose ester resin has an average of from about 0.27 to about 0.40 sulfate groups per anhydroglucose unit.
Claim 4
Dependent Claim
26 words
A water dispersible nonwoven fabric according to claim 1, wherein the ester group of said sulfated cellulose ester resin has from 1 to 6 carbon atoms.
Claim 5
Dependent Claim
18 words
A water-dispersible nonwoven fabric according to claim 3, wherein said sulfated cellulose ester is sodium cellulose acetate sulfate.
Claim 6
Dependent Claim
15 words
A water-dispersible nonwoven fabric according to claim 1 wherein said fibers are viscose rayon fibers.
Claim 7
Dependent Claim
23 words
A water-dispersible nonwoven fabric according to claim 1 wherein the length of said fibers does not exceed about one and one half inches.
Claim 8
Dependent Claim
21 words
A water-dispersible nonwoven fabric according to claim 1, wherein said resin binder is distributed in said fabric in a predetermined pattern.
Claim 9
Dependent Claim
40 words
A water-dispersible nonwoven fabric according to claim 1, wherein said fibers are viscose rayon fibers having a length of from about one half inch to about one and one half inches and said resin binder is sodium cellulose acetate sulfate.
Claim 10
Dependent Claim
27 words
A water-dispersible nonwoven fabric according to claim 1, wherein there is from about 4 to about 20 percent of said resin binder by weight of the fabric.
Claim 11
Dependent Claim
14 words
A water-dispersible nonwoven fabric according to claim 1 wherein said fibers are woodpulp fibers.
Claim 12
Dependent Claim
66 words
A water-dispersible nonwoven fabric comprising: a layer of overlapping, intersecting textile fibers, said fibers being viscose rayon fibers from about 1/2 inch to about 11/2 inches in length and from about 4 percent to about 20 percent of sodium cellulose acetate sulfate distributed in said fabric, said sodium cellulose acetate sulfate having an average of from about 0.27 to about 0.40 sulfate groups per anhydroglucose unit.
Claim 13
Dependent Claim
66 words
A water-dispersible nonwoven fabric comprising: a layer of overlapping, intersecting textile fibers, said fibers being viscose rayon fibers from about 1/2 inch to about 11/2 inches in length and from about 4 percent to about 20 percent of sodium cellulose acetate sulfate distributed in said fabric, said sodium cellulose acetate sulfate having an average of from about 0.27 to about 0.40 sulfate groups per anhydroglucose unit.
Claim 14
Dependent Claim
90 words
An absorbent product for contacting body fluids comprising: an absorbent core and a fluid-pervious, water-dispersible nonwoven fabric covering at least a portion of said absorbent core; said nonwoven fabric comprising a layer of overlapping, intersecting fibers, said fibers having a length not more than about 2 inches; and, distributed in said fabric, from about 4 to about 20 percent by weight of the fabric of an alkali cellulose ester sulfate resin binder, said resin binder having an average of from about 0.27 to about 0.40 sulfate groups per anhydroglucose unit.
Claim 15
Dependent Claim
90 words
An absorbent product for contacting body fluids comprising: an absorbent core and a fluid-pervious, water-dispersible nonwoven fabric covering at least a portion of said absorbent core; said nonwoven fabric comprising a layer of overlapping, intersecting fibers, said fibers having a length not more than about 2 inches; and, distributed in said fabric, from about 4 to about 20 percent by weight of the fabric of an alkali cellulose ester sulfate resin binder, said resin binder having an average of from about 0.27 to about 0.40 sulfate groups per anhydroglucose unit.
Claim 16
Dependent Claim
15 words
An absorbent product according to claim 12, wherein said absorbent core includes a fluid-pervious element.
Claim 17
Dependent Claim
13 words
An absorbent product according to claim 13, wherein the fluid-pervious element is tissue.
Claim 18
Dependent Claim
13 words
An absorbent product according to claim 13, wherein the fluid-pervious element is gauze.
Claim 19
Dependent Claim
15 words
An absorbent product according to claim 13, wherein the fluid-pervious element is a plastic netting.
Claim 20
Dependent Claim
15 words
An absorbent product according to claim 12, wherein said absorbent core includes a fluid-impervious element.
Claim 21
Dependent Claim
13 words
An absorbent product according to claim 17, wherein the fluid-impervious element comprises polyethylene.
Claim 22
Dependent Claim
19 words
An absorbent product according to claim 12, wherein the absorbent core includes a fluid-pervious element and a fluid-impervious element.
Claim 23
Dependent Claim
19 words
An absorbent product according to claim 19, wherein the fluid-pervious element is tissue and the fluid-impervious material comprises polyethylene.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-23 | 1979-08-25 | 1980-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-23 | 1983-08-25 | 1984-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-23 | 1987-08-25 | 1988-02-24 | $7700.00 | Window Closed / Lapsed |