US5112690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low hydrohead fibrous porous web with improved retentive wettability
Assignee: Kimberly Clark Worldwide Inc
•
Filing: 1990-11-01
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Granted: 1992-05-12
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Expires: 2010-11-01
Abstract
Abstract A method of treating a low hydrohead fibrous porous web material to increase its retentive wettability, by at least about 50%, as compared to untreated low hydrohead web material, is disclosed. The increase in retentive wettability is evidenced by the increase in the average number of runoff tests that the treated web material can sustain without unacceptable runoff is disclosed. The invention is also directed to products prepared or preparable by the process.
Inventors
- 👤 Bernard Cohen
- 👤 Michael T. Morman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:00
CPC Classifications
D; D06; D06M; D06M10/00; D06M10/02; A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/48; B; B29; B29C; B29C43/00; B29C43/22; D06M10/025; A61F; A61F13/00; A61F13/15; A61F13/51; A61F2013/51059; A61F2013/51066; A61F2013/51069; B29C59/00; B29C59/10; B29K; B29K2105/00; B29K2105/04; D06M2101/00; D06M2101/16; D06M2101/18; D06M2200/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
123 words
A method of treating a low hydrohead fibrous porous web to improve the web's retentive wettability by increasing, by at least about 50%, as compared to untreated web material, the average number of run-off tests that the low hydrohead web material can sustain without unacceptable run-off, the method comprising: providing a low hydrohead fibrous porous web material; forming a surface concentration on the web material of at least about 0.05%, by weight of the web material, of a surface active agent having a hydrophile-lipophile balance of at least about 6; and applying a corona discharge equivalent to a charge of at least about 0.6 watt minute per square foot per side of the web material to the surface active agent bearing web material.
Claim 2
Independent Claim
123 words
A method of treating a low hydrohead fibrous porous web to improve the web's retentive wettability by increasing, by at least about 50%, as compared to untreated web material, the average number of run-off tests that the low hydrohead web material can sustain without unacceptable run-off, the method comprising: providing a low hydrohead fibrous porous web material; forming a surface concentration on the web material of at least about 0.05%, by weight of the web material, of a surface active agent having a hydrophile-lipophile balance of at least about 6; and applying a corona discharge equivalent to a charge of at least about 0.6 watt minute per square foot per side of the web material to the surface active agent bearing web material.
Claim 3
Dependent Claim
27 words
The method of claim 1, wherein the surface concentration of the surface active agent is from about 0.05% to about 3%, by weight of the web material.
Claim 4
Dependent Claim
27 words
The method of claim 1, wherein the surface concentration of the surface active agent is from about 0.1% to about 1%, by weight of the web material.
Claim 5
Dependent Claim
27 words
The method of claim 1, wherein the surface concentration of the surface active agent is from about 0.1% to about 0.4%, by weight of the web material.
Claim 6
Dependent Claim
27 words
The method of claim 1, wherein the surface concentration of the surface active agent is from about 0.2% to about 0.3%, by weight of the web material.
Claim 7
Dependent Claim
35 words
The method of claim 1, wherein the equivalent of from about 0.6 to about 10 watt minute per square foot per side of the web material of corona discharge is applied to the web material.
Claim 8
Dependent Claim
35 words
The method of claim 1, wherein the equivalent of from about 1 to about 5 watt minute per square foot per side of the web material of corona discharge is applied to the web material.
Claim 9
Dependent Claim
35 words
The method of claim 1, wherein the equivalent of from about 2 to about 4 watt minute per square foot per side of the web material of corona discharge is applied to the web material.
Claim 10
Dependent Claim
19 words
The method of claim 1, wherein the hydrohead of the web material is less than 20 centimeters of water.
Claim 11
Dependent Claim
18 words
The method of claim 1, wherein the hydrohead of the web material is about 15 centimeres of water.
Claim 12
Dependent Claim
22 words
The method of claim 1, wherein the number of run-off tests prior to unacceptable run-off is increased by at least about 100%.
Claim 13
Dependent Claim
22 words
The method of claim 1, wherein the number of run-off tests prior to unacceptable run-off is increased by at least about 200%.
Claim 14
Dependent Claim
25 words
The method of claim 1, wherein the surface active agent is selected from the group consisting of one or more wetting agents, emulsions and detergents.
Claim 15
Dependent Claim
14 words
The method of claim 1, wherein the surface active agent is a wetting agent.
Claim 16
Dependent Claim
13 words
The method of claim 1, wherein the surface active agent is a surfactant.
Claim 17
Dependent Claim
13 words
The method of claim 1, wherein the surface active agent is an emulsion.
Claim 18
Dependent Claim
13 words
The method of claim 1, wherein the surface active agent is a detergent.
Claim 19
Dependent Claim
9 words
The product prepared by the process of claim 1.
Claim 20
Independent Claim
130 words
A method of treating a low hydrohead fibrous porous web to improve the web's retentive wettability by increasing, by at least about 50%, as compared to untreated web material, the average number of run-off tests that the low hydrohead web material can sustain without unacceptable run-off, the method comprising: providing a low hydrohead fibrous porous web material; forming a surface concentration on the web material of from at least about 0.1% to about 1%, by weight of the web material, of a surface active agent having a hydrophile-lipophile balance of from 10 to 20; and applying a corona discharge equivalent to a charge of from at least about 1 to 5 watt minute per square foot per side of the web material to the surface active agent bearing web material.
Claim 21
Independent Claim
130 words
A method of treating a low hydrohead fibrous porous web to improve the web's retentive wettability by increasing, by at least about 50%, as compared to untreated web material, the average number of run-off tests that the low hydrohead web material can sustain without unacceptable run-off, the method comprising: providing a low hydrohead fibrous porous web material; forming a surface concentration on the web material of from at least about 0.1% to about 1%, by weight of the web material, of a surface active agent having a hydrophile-lipophile balance of from 10 to 20; and applying a corona discharge equivalent to a charge of from at least about 1 to 5 watt minute per square foot per side of the web material to the surface active agent bearing web material.
Claim 22
Dependent Claim
20 words
The method of claim 1, wherein the hydrophile-lipophile balance of the surface active agent ranges from 8 to about 20.
Claim 23
Dependent Claim
20 words
The method of claim 1, wherein the hydrophile-lipophile balance of the surface active agent ranges from 10 to about 20.
Claim 24
Dependent Claim
20 words
The method of claim 1, wherein the hydrohead of the web material is less than about 25 centimeters of water.
Claim 25
Independent Claim
130 words
A method of treating a low hydrohead fibrous porous web to improve the web's retentive wettability by increasing, by at least about 50%, as compared to untreated web material, the average number of run-off tests that the low hydrohead web material can sustain without unacceptable run-off, the method comprising: providing a low hydrohead fibrous porous web material; forming a surface concentration on the web material of from at least about 0.05% to about 3%, by weight of the web material, of a surface active agent having a hydrophile-lipophile balance of from 8 to 20; and applying a corona discharge equivalent to a charge of from at least about 0.6 to 10 watt minute per square foot per side of the web material to the surface active agent bearing web material.
Claim 26
Independent Claim
130 words
A method of treating a low hydrohead fibrous porous web to improve the web's retentive wettability by increasing, by at least about 50%, as compared to untreated web material, the average number of run-off tests that the low hydrohead web material can sustain without unacceptable run-off, the method comprising: providing a low hydrohead fibrous porous web material; forming a surface concentration on the web material of from at least about 0.05% to about 3%, by weight of the web material, of a surface active agent having a hydrophile-lipophile balance of from 8 to 20; and applying a corona discharge equivalent to a charge of from at least about 0.6 to 10 watt minute per square foot per side of the web material to the surface active agent bearing web material.
Claim 27
Dependent Claim
9 words
The product prepared by the process of claim 23.
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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) | 1995-05-12 | 1995-11-11 | 1996-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-12 | 1999-11-11 | 2000-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-12 | 2003-11-11 | 2004-05-12 | $7700.00 | Window Closed / Lapsed |