Patent US5370132A successfully refreshed from Google Patents.
US5370132A
Expired / Lapsed
US
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Repellent-treated, barrier-coated nonwoven web
Assignee: Kimberly Clark Worldwide Inc
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Filing: 1990-11-20
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Granted: 1994-12-06
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Expires: 2010-11-20
Abstract
Abstract Disclosed herein is a repellent-treated, barrier coated nonwoven web. Nonwoven webs with small fiber and pore sizes can often be surface coated with a barrier coating such as latex to form a nonwoven which will act as a barrier to liquids. Surface coating of nonwovens having larger pores and fibers is more difficult as the coating often sinks into the thickness of the nonwoven web. The material of the present invention is a larger fiber/pore nonwoven web which will permit surface coating to form a material which has a good hand and cloth-like feel while also acting as a barrier to liquids. Such a material has a wide variety of applications including, but not limited to, personal care products, surgical drapes and gowns and other applications requiring barrier properties.
Inventors
- 👤 Robert E. Weber
- 👤 Steven W. Fitting
- 👤 Patricia A. Jegier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:38
CPC Classifications
D; D06; D06N; D06N7/00; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4282; D04H1/4291; A; A41; A41D; A41D31/00; A41D31/04; A41D31/10; A61; A61B; A61B46/00; A61B46/40; A61L; A61L31/00; A61L31/08; A61L31/10; A61L31/14; D04H1/4326; D04H1/435; Y; Y10; Y10S; Y10S428/00; Y10S428/907; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249958; Y10T428/249978; Y10T428/24998; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T442/00; Y10T442/20; Y10T442/2164; Y10T442/2189; Y10T442/2221; Y10T442/2238; Y10T442/2549; Y10T442/2566
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
108 words
A liquid barrier material comprising: a plurality of entangled fibers forming a nonwoven batt, said batt having a top surface and a bottom surface, said top surface of said batt including fibers having average widths along their major axes greater than or equal to 10 microns and surface pores in said top surface having average diameters ranging in size from about 50 to about 100 microns; a liquid repellent coating covering said fibers forming said top surface of said batt, and a barrier coating covering said top surface of said batt to form a liquid barrier, said barrier coating having a thickness of about 37 microns or greater.
Claim 2
Dependent Claim
108 words
A liquid barrier material comprising: a plurality of entangled fibers forming a nonwoven batt, said batt having a top surface and a bottom surface, said top surface of said batt including fibers having average widths along their major axes greater than or equal to 10 microns and surface pores in said top surface having average diameters ranging in size from about 50 to about 100 microns; a liquid repellent coating covering said fibers forming said top surface of said batt, and a barrier coating covering said top surface of said batt to form a liquid barrier, said barrier coating having a thickness of about 37 microns or greater.
Claim 3
Dependent Claim
32 words
The liquid barrier material of claim 1 wherein said repellent coating is present in a range of about 0.3 to about 3.0 dry parts repellent coating per 100 parts fiber by weight.
Claim 4
Dependent Claim
23 words
The liquid barrier material of claim 1 wherein said liquid barrier material has a Gurley porosity greater than or equal to 10,000 seconds.
Claim 5
Dependent Claim
27 words
The liquid barrier material of claim 1 wherein said barrier coating has a glass transition temperature (Tg) in the range of about -50° to about 30° C.
Claim 6
Dependent Claim
27 words
The liquid barrier material of claim 1 wherein said barrier coating has a glass transition temperature (Tg) in the range of about 0° to about 10° C.
Claim 7
Dependent Claim
36 words
The liquid barrier material of claim 1 wherein said batt is bonded at a plurality of bond points, said individual bond points having a surface area less than or equal to about 0.006 cm 2 .
Claim 8
Dependent Claim
32 words
The liquid barrier material of claim 6 wherein said plurality of bond points cover between about 10 and about 30% of the total surface area of said top surface of said web.
Claim 9
Dependent Claim
160 words
A liquid barrier material comprising: a plurality of entangled fibers forming a nonwoven batt, said batt having a top surface and a bottom surface, said top surface of said batt including fibers having average widths along their major axes greater than or equal to 10 microns and surface pores in said top surface having average diameters ranging in size from about 50 to about 100 microns; a repellent coating covering said fibers forming said top surface of said batt, said repellent coating being present in a range of about 0.3 to about 3.0 dry parts repellent coating per 100 parts fiber by weight, and a barrier coating covering said top surface of said batt to form a liquid barrier material having a Gurley porosity greater than or equal to 10,000 seconds, said aqueous barrier coating having a glass transition temperature (Tg) in the range of about 0 ° to about 10° C. and thickness of about 37 microns or greater.
Claim 10
Dependent Claim
160 words
A liquid barrier material comprising: a plurality of entangled fibers forming a nonwoven batt, said batt having a top surface and a bottom surface, said top surface of said batt including fibers having average widths along their major axes greater than or equal to 10 microns and surface pores in said top surface having average diameters ranging in size from about 50 to about 100 microns; a repellent coating covering said fibers forming said top surface of said batt, said repellent coating being present in a range of about 0.3 to about 3.0 dry parts repellent coating per 100 parts fiber by weight, and a barrier coating covering said top surface of said batt to form a liquid barrier material having a Gurley porosity greater than or equal to 10,000 seconds, said aqueous barrier coating having a glass transition temperature (Tg) in the range of about 0 ° to about 10° C. and thickness of about 37 microns or greater.
Claim 11
Dependent Claim
33 words
The liquid barrier material of claim 8 wherein said batt is bonded at a plurality of bond points, said individual bond points having surface areas less than or about 0.006 cm 2 .
Claim 12
Dependent Claim
31 words
The liquid barrier material of claim 9 wherein said plurality of bond points cover between 10 and about 30% of the total surface area of said top surface of said web.
Claim 13
Dependent Claim
13 words
The liquid barrier material of claim 8 wherein said partier coating is latex.
Claim 14
Dependent Claim
13 words
The liquid barrier material of claim 11 wherein said barrier coating is cross-linked.
Claim 15
Dependent Claim
15 words
The liquid barrier material of claim 11 wherein said latex further contains a liquid repellent.
Claim 16
Dependent Claim
14 words
The liquid barrier material of claim 13 wherein said liquid repellent is a fluorocarbon.
Claim 17
Dependent Claim
16 words
The liquid barrier material of claim 8 wherein said barrier coating is an aqueous solution polymer.
Claim 18
Dependent Claim
13 words
The liquid barrier material of claim 15 wherein said barrier coating is cross-linked.
Claim 19
Dependent Claim
20 words
The liquid barrier material of claim 8 wherein said fibers are selected from the group consisting of polyolefins and polyesters.
Claim 20
Dependent Claim
113 words
A personal care product including a liquid barrier material comprising: a plurality of entangled fibers forming a nonwoven batt, said batt having a top surface and a bottom surface, said top surface of said batt including fibers having average widths along their major axes greater than or equal to 10 microns and surface pores in said top surface having average diameters ranging in size from about 50 to about 100 microns; a liquid repellent coating covering said fibers forming said top surface of said batt, and an barrier coating covering said top surface of said batt to form a liquid barrier, said barrier coating having a thickness of about 37 microns or greater.
Claim 21
Dependent Claim
113 words
A personal care product including a liquid barrier material comprising: a plurality of entangled fibers forming a nonwoven batt, said batt having a top surface and a bottom surface, said top surface of said batt including fibers having average widths along their major axes greater than or equal to 10 microns and surface pores in said top surface having average diameters ranging in size from about 50 to about 100 microns; a liquid repellent coating covering said fibers forming said top surface of said batt, and an barrier coating covering said top surface of said batt to form a liquid barrier, said barrier coating having a thickness of about 37 microns or greater.
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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) | 1997-12-05 | 1998-06-06 | 1998-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-05 | 2002-06-06 | 2002-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-05 | 2006-06-06 | 2006-12-06 | $7700.00 | Window Closed / Lapsed |