US5122407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Odor-removing cover for absorbent pads and method of making same
Assignee: Kimberly Clark Corp
•
Filing: 1990-06-20
•
Granted: 1992-06-16
•
Expires: 2010-06-20
Abstract
Abstract An absorbent pad has a cover formed of non-woven fibrous material, which is coated with a fluorocarbon polymer and odor absorber(s). The cover sheet is apertured around a critical zone to overcome undesired surface tension effects. The method of producing the cover includes providing a water-based mixture that includes 1% by weight of a fluorocarbon composition. An odor absorbing reagent is added to the mixture which then is applied to a nonwoven web of fibrous material. The treated web is dried to remove the excess water from the mixture, and the fluorocarbon composition component is cured to form a hydrophobic coating around the reagent and to bind the reagent to the web. The drying and curing steps can be accomplished by applying a flow of air heated to a temperature in a range from about 100 DEG C. to about 120 DEG C. to the web until the water has been removed.
Inventors
- 👤 Richard S. Yeo
- 👤 Mary G. Weber
- 👤 Stephanie R. Majors
- 👤 Richard W. Tanzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:46
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/51; A61F13/511; A61F13/512; A61F13/51121; A61F13/513; A61F13/51305; A61F13/84; A61F13/8405; A61L; A61L15/00; A61L15/16; A61L15/18; A61L15/20; A61L15/42; A61L15/46; A61F2013/51059; A61F2013/51061; A61F2013/5109; A61F2013/8408; A61F2013/842; A61F2013/8423; A61F2013/8426; A61L2300/00; A61L2300/10; A61L2300/102; A61L2300/20; A61L2300/21; Y; Y10; Y10T; Y10T428/00; Y10T428/23; Y10T428/237; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/24802; Y10T428/24826; Y10T428/31504; Y10T428/3154; Y10T442/00; Y10T442/20; Y10T442/2139; Y10T442/2508
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
144 words
A pad for absorbing bodily fluids and controlling odor created by the presence of the bodily fluids in the pad, the pad comprising: (a) a liquid ad vapor permeable cover having a periphery, the cover including: (i) a nonwoven web having a zone wherein from about 6 to about 1100 apertures are defined by the web within the zone; (ii) a liquid impermeable and vapor permeable fluorocarbon composition adhered to said web, and (iii) an odor absorbing reagent bound to said web by said fluorocarbon composition, said reagent being rendered hydrophobic by said composition; (b) a liquid and vapor impermeable baffle having a periphery; and (c) a liquid absorbent material disposed between said cover and said baffle; and wherein the cover and the baffle are in general juxtaposed position with respect to each other and are joined to each other at their respective peripheries.
Claim 2
Dependent Claim
144 words
A pad for absorbing bodily fluids and controlling odor created by the presence of the bodily fluids in the pad, the pad comprising: (a) a liquid ad vapor permeable cover having a periphery, the cover including: (i) a nonwoven web having a zone wherein from about 6 to about 1100 apertures are defined by the web within the zone; (ii) a liquid impermeable and vapor permeable fluorocarbon composition adhered to said web, and (iii) an odor absorbing reagent bound to said web by said fluorocarbon composition, said reagent being rendered hydrophobic by said composition; (b) a liquid and vapor impermeable baffle having a periphery; and (c) a liquid absorbent material disposed between said cover and said baffle; and wherein the cover and the baffle are in general juxtaposed position with respect to each other and are joined to each other at their respective peripheries.
Claim 3
Dependent Claim
29 words
The pad according o claim 1, wherein the nonwoven web is formed from fibers selected from the group consisting of polyester fibers, polyamide fibers, cellulosic fibers or polyolefin fibers.
Claim 4
Dependent Claim
27 words
The pad according to claim 1, wherein the liquid impermeable and vapor permeable fluorocarbon composition is selected from the group consisting of perfluoroalkyl acrylic copolymer or polytetrafluoroethylene.
Claim 5
Dependent Claim
44 words
The pad according to claim 1, wherein h odor absorbing material is selected from the group consisting of one or more of carbonates, bicarbonates, phosphates, biphosphates, sulfates, and bisulfates of alkali and alkaline earth metals, ascorbic acid, boric acid, citric acid and maleic acid.
Claim 6
Dependent Claim
28 words
The pad according to claim 1, wherein the liquid and vapor impermeable baffle is formed from a film selected from the group consisting of polypropylene or polyethylene film.
Claim 7
Dependent Claim
30 words
The pad according o claim 1, wherein the liquid absorbent material is selected from the group consisting of cellulose, wood fluff, coform materials, meltblown materials, carded materials or sphagnum moss.
Claim 8
Dependent Claim
21 words
The pad according to claim 1, wherein the diameter of the apertures ranges from about 0.8 millimeters to about 10 millimeters.
Claim 9
Dependent Claim
21 words
The pad according to claim 7, wherein the diameter of the apertures ranges rom about 1 millimeter to about 2 millimeters.
Claim 10
Dependent Claim
28 words
The pad according to claim 1, wherein the aperture density in the zone ranges from about 50 apertures per square inch to about 300 apertures per square inch.
Claim 11
Dependent Claim
16 words
The pad according to claim 9, wherein the zone is about 4 inches by 1.5 inches.
Claim 12
Dependent Claim
18 words
The pad according to claim 10, wherein the zone is generally located centrally and symmetrically on the cover.
Claim 13
Dependent Claim
24 words
The pad according to claim 11, wherein the apertures define an open area that ranges from about 2% to about 90% of the zone.
Claim 14
Dependent Claim
28 words
The pad according to claim 12, wherein the apertures define an open area that ranges from about 10% to about 40% of the open area of the zone.
Claim 15
Dependent Claim
34 words
The pad of claim 1, wherein the cover and the baffle are joined at their respective peripheries by a means selected from h group consistin of heat sealing, adhesive application, crimping or spot bonding.
Claim 16
Dependent Claim
146 words
A pad for absorbing bodily fluids and controlling odor created by the presence of the bodily fluids in the pad, the pad comprising: (a) a liquid and vapor permeable cover having a periphery, the cover including: (i) a nonwoven web having a zone wherein from about 6 to about 1100 apertures per square inch are defined by the web within the zone; (ii) a liquid impermeable and vapor permeable fluorocarbon composition adhered to said web, and (iii) odor absorbing means bound to the web by the fluorocarbon composition, the reagent being rendered hydrophobic by the composition; (b) a liquid and vapor impermeable baffle having a periphery; and (c) a liquid absorbent material disposed between said cover and said baffle; and wherein the cover and the baffle are in general juxtaposed position with respect to each other and are joined to each other at their respective peripheries.
Claim 17
Dependent Claim
146 words
A pad for absorbing bodily fluids and controlling odor created by the presence of the bodily fluids in the pad, the pad comprising: (a) a liquid and vapor permeable cover having a periphery, the cover including: (i) a nonwoven web having a zone wherein from about 6 to about 1100 apertures per square inch are defined by the web within the zone; (ii) a liquid impermeable and vapor permeable fluorocarbon composition adhered to said web, and (iii) odor absorbing means bound to the web by the fluorocarbon composition, the reagent being rendered hydrophobic by the composition; (b) a liquid and vapor impermeable baffle having a periphery; and (c) a liquid absorbent material disposed between said cover and said baffle; and wherein the cover and the baffle are in general juxtaposed position with respect to each other and are joined to each other at their respective peripheries.
Claim 18
Dependent Claim
29 words
The pad according to claim 15, wherein the nonwoven web is formed from fibers selected from the group consisting of polyester fibers, polyamide fibers, cellulosic fibers or polyolefin fibers.
Claim 19
Dependent Claim
27 words
The pad according to claim 15, wherein the liquid impermeable and vapor permeable fluorocarbon composition is electrode from the group consisting of perfluoroalkyl acrylic copolymer or polytetrafluoroethylene.
Claim 20
Dependent Claim
44 words
The pad according to claim 15, wherein the odor absorbing material is selected from the group consisting of one or more of carbonates, bicarbonates, phosphates, biphosphates, sulfates, and bisulfates of alkali and alkaline earth metals, ascorbic acid, boric acid, citric acid and maleic acid.
Claim 21
Dependent Claim
28 words
The pad according to claim 15, wherein the liquid and vapor impermeable baffle is formed from a film selected from the group consisting of polypropylene or polyethylene film.
Claim 22
Dependent Claim
30 words
The pad according to claim 15, wherein the liquid absorbent material is selected from the group consistin of cellulose wood fluff, coform materials, meltblown materials, carded materials or sphagnum moss.
Claim 23
Dependent Claim
21 words
The pad according to claim 15, wherein the diameter of the apertures ranges from about 0.8 millimeters to about 10 millimeters.
Claim 24
Dependent Claim
21 words
The pad according to claim 21, wherein the diameter of the apertures ranges from about 1 millimeter to about 2 millimeters.
Claim 25
Dependent Claim
28 words
The pad according to claim 15, wherein the aperture density in the zone ranges from about 50 apertures per square inch to about 300 apertures per square inch.
Claim 26
Dependent Claim
16 words
The pad according to claim 23, wherein the zone is about 4 inches by 1.5 inches.
Claim 27
Dependent Claim
18 words
The pad according to claim 24, wherein the zone is generally located centrally and symmetrically on the cover.
Claim 28
Dependent Claim
24 words
The pad according to claim 25, wherein the apertures define an open area that ranges from about 2% to about 90% of the zone.
Claim 29
Dependent Claim
28 words
The pad according to claim 26, wherein the apertures define an open area that ranges from about 10% to about 40% of the open area of the zone.
Claim 30
Dependent Claim
245 words
A pad for absorbing bodily fluids and controlling odor created by the presence of the bodily fluids in the pad, the pad comprising: (a) a liquid and vapor permeable cover having a periphery, the cover including: (i) a nonwoven web formed from fibers selected from the group consisting of polyester fibes, polyamide fibers, cellulosic fibers or polyolefin fibers the nonwoven web having a zone wherein from about 6 to about 1100 apertures per square inch are defined by the web within the zone; (ii) a liquid impermeable and vapor permeable fluorocarbon composition selected from the group consisting of perfluoroalkyl acrylic copolymer or polytetrafluoroethylene adhered to said web; and (iii) odor absorbing material, selected from the group consisting of one or more of carbonates, bicarbonates, phosphates, biphosphates, sulfates d bisulfates of alkali and alkaline earth metals, ascorbic acid, boric acid, citric acid and maleic acid, bound to the web by the fluorocarbon composition, the reagent being rendered hydrophobic by the composition; (b) a liquid and vapor impermeable baffle having a periphery, the baffle being formed from a film selected from the group consisting of polypropylene or polyethylene film; and (c) a liquid absorbent material, selected from the group consisting of cellulose, wood fluff, coform materials, meltblown materials, carded materials or sphagnum moss, disposed between the cover and the baffle; and wherein the cover and the baffle are in general juxtapose position with respect to each other and are joined to each other at their respective peripheries.
Claim 31
Dependent Claim
245 words
A pad for absorbing bodily fluids and controlling odor created by the presence of the bodily fluids in the pad, the pad comprising: (a) a liquid and vapor permeable cover having a periphery, the cover including: (i) a nonwoven web formed from fibers selected from the group consisting of polyester fibes, polyamide fibers, cellulosic fibers or polyolefin fibers the nonwoven web having a zone wherein from about 6 to about 1100 apertures per square inch are defined by the web within the zone; (ii) a liquid impermeable and vapor permeable fluorocarbon composition selected from the group consisting of perfluoroalkyl acrylic copolymer or polytetrafluoroethylene adhered to said web; and (iii) odor absorbing material, selected from the group consisting of one or more of carbonates, bicarbonates, phosphates, biphosphates, sulfates d bisulfates of alkali and alkaline earth metals, ascorbic acid, boric acid, citric acid and maleic acid, bound to the web by the fluorocarbon composition, the reagent being rendered hydrophobic by the composition; (b) a liquid and vapor impermeable baffle having a periphery, the baffle being formed from a film selected from the group consisting of polypropylene or polyethylene film; and (c) a liquid absorbent material, selected from the group consisting of cellulose, wood fluff, coform materials, meltblown materials, carded materials or sphagnum moss, disposed between the cover and the baffle; and wherein the cover and the baffle are in general juxtapose position with respect to each other and are joined to each other at their respective peripheries.
Claim 32
Dependent Claim
21 words
The pad according to claim 28, wherein the diameter of the apertures ranges from about 0.8 millimeters to bout 10 millimeters.
Claim 33
Dependent Claim
21 words
The pad according to claim 29, wherein the diameter o the apertures ranges from about 1 millimeter to about 2 millimeters.
Claim 34
Dependent Claim
28 words
The pad according to claim 28, wherein the aperture density in the zone ranges from about 50 apertures per square inch to about 300 apertures per square inch.
Claim 35
Dependent Claim
16 words
The pad according to claim 31, wherein the zone is about 4 inches by 1.5 inches.
Claim 36
Dependent Claim
18 words
The pad according to claim 32, wherein the zone is generally located centrally and symmetrically on The cover.
Claim 37
Dependent Claim
24 words
The pad according to claim 33, wherein the apertures define an open area that ranges from about 2% to about 90% of the zone.
Claim 38
Dependent Claim
28 words
The pad according to claim 34, wherein the apertures define an open area that ranges from about 10% to about 40% of the open area of the zone.
References Cited (Backward Citations)
US795562A
Cited
AU109904A
Cited
US2024145A
Cited
US2066946A
Cited
DE652088C
Cited
US2690415A
Cited
US3068187A
Cited
US3108018A
Cited
US3149023A
Cited
US3340875A
Cited
US3670731A
Cited
US3439678A
Cited
US3542028A
Cited
US3683917A
Cited
US4208459A
Cited
US3693622A
Cited
US3804094A
Cited
US3856014A
Cited
US3903889A
Cited
US3995636A
Cited
DE2424988A1
Cited
US3939838A
Cited
US4066394A
Cited
US4055184A
Cited
DE2652088A1
Cited
US4169187A
Cited
US4289513A
Cited
US4194041A
Cited
US4296166A
Cited
US4226237A
Cited
US4217386A
Cited
WO1981001643A1
Cited
US4347844A
Cited
US4583980A
Cited
US4381784A
Cited
GB2093551A
Cited
GB2093352A
Cited
US4397646A
Cited
US4467013A
Cited
US4429001A
Cited
US4433024A
Cited
US4547195A
Cited
US4525410A
Cited
US4431698A
Cited
DE3302984A1
Cited
US4544650A
Cited
US4459332A
Cited
US4565727A
Cited
US4565727B1
Cited
US4508775A
Cited
US4755178A
Cited
US4655757A
Cited
US4545080A
Cited
US4650479A
Cited
US4732805A
Cited
US4677019A
Cited
US4806408A
Cited
US4715857A
Cited
US4721647A
Cited
US4699620A
Cited
US4795562A
Cited
US4701177A
Cited
US4702749A
Cited
US4748065A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-06-16 | 1995-12-16 | 1996-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-16 | 1999-12-16 | 2000-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-16 | 2003-12-16 | 2004-06-16 | $7700.00 | Window Closed / Lapsed |