US5378528A
Expired / Lapsed
US
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Absorbent structure containing superabsorbent particles and having a latex binder coating on at least one surface of the absorbent structure
Assignee: Fort James Corp
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Filing: 1991-10-15
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Granted: 1995-01-03
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Expires: 2011-10-15
Abstract
Abstract A liquid absorbent structure is made by dry laying a fibrous web having incorporated therein a superabsorbent material, and applying a latex coating to at least one surface of the web, which on curing imparts integrity to the resulting structure without substantially impairing the effectiveness of the superabsorbent material to absorb liquid.
Inventors
- 👤 Kambiz B. Makoui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:17
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/45; A61F13/47; A61F13/474; A61F13/15577; A61F13/15617; A61F13/15642; A61F13/15658; A61F13/53; A61F13/534; A61F13/551; A61F13/15203; A61F2013/15284; A61F13/51; A61F13/514; A61F13/51401; A61F2013/51441; A61F2013/5145; A61F2013/530481; A61F2013/5307; A61F2013/530708; Y; Y10; Y10S; Y10S428/00; Y10S428/906; Y10T; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/159; Y10T442/20; Y10T442/2762; Y10T442/277; Y10T442/60; Y10T442/659; Y10T442/673; Y10T442/693; Y10T442/699
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
94 words
A dry laid, liquid absorbent structure comprising a dry laid fibrous web having randomly incorporated therein solid particulate of a superabsorbent material, and a latex coating on at least one surface of said fibrous web, said structure having (i) a basis weight of about 20 to 500 grams per square meter, (ii) an absorptive capacity of not less than about 6 grams of a one percent saline solution per gram of structure and (iii) a retention capability of not less than about 5 grams of a one percent saline solution per gram of structure.
Claim 2
Dependent Claim
94 words
A dry laid, liquid absorbent structure comprising a dry laid fibrous web having randomly incorporated therein solid particulate of a superabsorbent material, and a latex coating on at least one surface of said fibrous web, said structure having (i) a basis weight of about 20 to 500 grams per square meter, (ii) an absorptive capacity of not less than about 6 grams of a one percent saline solution per gram of structure and (iii) a retention capability of not less than about 5 grams of a one percent saline solution per gram of structure.
Claim 3
Dependent Claim
24 words
A dry laid structure according to claim 1 wherein a porous reinforcing member is provided on at least one surface of said fibrous web.
Claim 4
Dependent Claim
116 words
A dry laid, liquid absorbent structure comprising a dry laid fibrous web, a porous reinforcing member disposed substantially interjacent the surfaces of said fibrous web, solid particulate of a superabsorbent material randomly incorporated into said fibrous web to one side of said reinforcing web, and a latex coating on at least one surface of said fibrous web, said structure having (i) a basis weight of about 20 to 500 grams per square meter, (ii) an absorptive capacity of not less than about 6 grams of a one percent saline solution per gram of structure and (iii) a retention capability of not less than about 5 grams of a one percent saline solution per gram of structure.
Claim 5
Dependent Claim
116 words
A dry laid, liquid absorbent structure comprising a dry laid fibrous web, a porous reinforcing member disposed substantially interjacent the surfaces of said fibrous web, solid particulate of a superabsorbent material randomly incorporated into said fibrous web to one side of said reinforcing web, and a latex coating on at least one surface of said fibrous web, said structure having (i) a basis weight of about 20 to 500 grams per square meter, (ii) an absorptive capacity of not less than about 6 grams of a one percent saline solution per gram of structure and (iii) a retention capability of not less than about 5 grams of a one percent saline solution per gram of structure.
Claim 6
Dependent Claim
24 words
A structure according to any of claims 1, 2 or 3 wherein said structure comprises about 5 to 30 percent by weight of latex.
Claim 7
Dependent Claim
19 words
A structure according to claim 4 wherein said structure comprises about 10 to 20 percent by weight of latex.
Claim 8
Dependent Claim
18 words
A structure according to any of claims 1, 2 or 3 wherein said fibrous web comprises cellulosic fibers.
Claim 9
Dependent Claim
18 words
A structure according to any of claims 1, 2 or 3 wherein said fibrous web comprises synthetic fibers.
Claim 10
Dependent Claim
24 words
A structure according to any of claims 1, 2 or 3 wherein said fibrous web comprises an admixture of cellulosic fibers and synthetic fibers.
Claim 11
Dependent Claim
21 words
A structure according to claim 8 wherein said fibrous web comprises about 65 to 95 percent by weight wood pulp fibers.
Claim 12
Dependent Claim
22 words
A structure according to any of claims 1, 2 or 3 wherein both surfaces of said web are coated with said latex.
Claim 13
Dependent Claim
27 words
A structure according to any of claims 1, 2 or 3 wherein said superabsorbent material comprises from about 10 to 65 percent by weight of said structure.
Claim 14
Dependent Claim
22 words
A structure according to claim 11 wherein said superabsorbent material comprises from about 15 to 55 percent by weight of said structure.
Claim 15
Dependent Claim
67 words
A structure according to any one of claims 1, 2 or 3 wherein said basis weight is from about 20 to 350 grams per square meter, said absorptive capacity is not less than about 8 grams of a one percent saline solution per gram of structure, and said retention capability is not less than about 6 grams of a one percent saline solution per gram of structure.
Claim 16
Dependent Claim
23 words
A structure according to claim 3 wherein said reinforcing member is selected from group consisting of creped paper, 3-D formed paper, and scrim.
Claim 17
Dependent Claim
104 words
A disposable diaper containing an absorbent pad wherein said absorbent pad comprises a dry laid fibrous web having randomly incorporated therein about 10 to 65 weight percent of solid particulate superabsorbent material, and a latex coating on at least one surface of said fibrous web, said pad having (i) a basis weight of about 20 to 500 grams per square meter, (ii) an absorptive capacity of not less than about 6 grams of a one percent saline solution per gram of structure and (iii) a retention capability of not less than about 5 grams of a one percent saline solution per gram of structure.
Claim 18
Dependent Claim
104 words
A disposable diaper containing an absorbent pad wherein said absorbent pad comprises a dry laid fibrous web having randomly incorporated therein about 10 to 65 weight percent of solid particulate superabsorbent material, and a latex coating on at least one surface of said fibrous web, said pad having (i) a basis weight of about 20 to 500 grams per square meter, (ii) an absorptive capacity of not less than about 6 grams of a one percent saline solution per gram of structure and (iii) a retention capability of not less than about 5 grams of a one percent saline solution per gram of structure.
Claim 19
Dependent Claim
113 words
A sanitary napkin having a liquid-permeable facing member and an opposed liquid-barrier member and an interposed dry laid, liquid absorbent structure comprising a dry laid fibrous web having randomly incorporated therein about 10 to 65 weight percent solid particulate superabsorbent material, and a latex coating on at least one surface of said fibrous web, said structure having (i) a basis weight of about 20 to 500 grams per square meter, (ii) an absorptive capacity of not less than about 6 grams of a one percent saline solution per gram of structure and (iii) a retention capability of not less than about 5 grams of a one percent saline solution per gram of structure.
Claim 20
Dependent Claim
113 words
A sanitary napkin having a liquid-permeable facing member and an opposed liquid-barrier member and an interposed dry laid, liquid absorbent structure comprising a dry laid fibrous web having randomly incorporated therein about 10 to 65 weight percent solid particulate superabsorbent material, and a latex coating on at least one surface of said fibrous web, said structure having (i) a basis weight of about 20 to 500 grams per square meter, (ii) an absorptive capacity of not less than about 6 grams of a one percent saline solution per gram of structure and (iii) a retention capability of not less than about 5 grams of a one percent saline solution per gram of structure.
Claim 21
Dependent Claim
98 words
A wipe adaptable for absorbing liquids comprising a dry laid fibrous web having randomly incorporated therein about 1 to 10 weight percent solid particulate superabsorbent material, and a latex coating on at least one surface of said fibrous web, said structure having (i) a basis weight of about 20 to 500 grams per square meter, (ii) an absorptive capacity of not less than about 6 grams of a one percent saline solution per gram of structure and (iii) a retention capability of not less than about 5 grams of a one percent saline solution per gram of structure.
Claim 22
Dependent Claim
98 words
A wipe adaptable for absorbing liquids comprising a dry laid fibrous web having randomly incorporated therein about 1 to 10 weight percent solid particulate superabsorbent material, and a latex coating on at least one surface of said fibrous web, said structure having (i) a basis weight of about 20 to 500 grams per square meter, (ii) an absorptive capacity of not less than about 6 grams of a one percent saline solution per gram of structure and (iii) a retention capability of not less than about 5 grams of a one percent saline solution per gram of structure.
Claim 23
Dependent Claim
112 words
A roll comprising a plurality of liquid absorbent pads, each of said pads separable from said roll along a transverse score line, each pad comprising a dry laid fibrous web having randomly incorporated therein solid particulate of a superabsorbent material, and a latex coating on at least one surface of said fibrous web, said structure having (i) a basis weight of about 20 to 500 grams per square meter, (ii) an absorptive capacity of not less than about 6 grams of a one percent saline solution per gram of structure and (iii) a retention capability of not less than about 5 grams of a one percent saline solution per gram of structure.
Claim 24
Dependent Claim
112 words
A roll comprising a plurality of liquid absorbent pads, each of said pads separable from said roll along a transverse score line, each pad comprising a dry laid fibrous web having randomly incorporated therein solid particulate of a superabsorbent material, and a latex coating on at least one surface of said fibrous web, said structure having (i) a basis weight of about 20 to 500 grams per square meter, (ii) an absorptive capacity of not less than about 6 grams of a one percent saline solution per gram of structure and (iii) a retention capability of not less than about 5 grams of a one percent saline solution per gram of structure.
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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) | 1998-01-02 | 1998-07-04 | 1999-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-02 | 2002-07-04 | 2003-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-02 | 2006-07-04 | 2007-01-03 | $7700.00 | Window Closed / Lapsed |