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US4772492A
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Binder catalyst for an antimicrobially active, non-woven web
Assignee: Fort James Corp
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Filing: 1987-12-30
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Granted: 1988-09-20
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Expires: 2007-12-30
Abstract
Abstract An antimicrobially active, non-woven web, a wet wiper containing the web, and a method of making the web. The method includes the steps of forming an unbonded fibrous web; applying throughout the unbonded fibrous web an uncured polymeric binder; applying a leachable catalyst to catalyze the cross-linking of the binder during curing, the leachable catalyst being antimicrobial; and curing the binder to cross-link the binder and bind the fibers together to form an antimicrobially active, non-woven web.
Inventors
- 👤 Michael P. Bouchette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:58
CPC Classifications
A; A01; A01N; A01N25/00; A01N25/34; D; D06; D06M; D06M16/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
89 words
A method for making an antimicrobially active, non-woven web comprising the steps of: (a) forming an unbonded cellulosic fiber web; (b) applying throughout the unbonded fibrous web an uncured polymeric binder; (c) applying a leachable catalyst to the web to catalyze the cross-linking of the binder during curing, the leachable catalyst being antimicrobial non-toxic and non-irratating and present in an amount effective to render the cured web antimicrobial; and (d) curing the binder to cross-link the binder and bind the fibers together to form an antimicrobially active, non-woven web.
Claim 2
Independent Claim
89 words
A method for making an antimicrobially active, non-woven web comprising the steps of: (a) forming an unbonded cellulosic fiber web; (b) applying throughout the unbonded fibrous web an uncured polymeric binder; (c) applying a leachable catalyst to the web to catalyze the cross-linking of the binder during curing, the leachable catalyst being antimicrobial non-toxic and non-irratating and present in an amount effective to render the cured web antimicrobial; and (d) curing the binder to cross-link the binder and bind the fibers together to form an antimicrobially active, non-woven web.
Claim 3
Dependent Claim
13 words
The method of claim 1, wherein the polymeric binder is a latex binder.
Claim 4
Dependent Claim
27 words
The method of claim 1, wherein the polymeric binder comprises at least one binder selected from the group consisting of anionic binders, nonionic binders, and cationic binders.
Claim 5
Dependent Claim
13 words
The method of claim 1, wherein the leachable catalyst is an organic acid.
Claim 6
Dependent Claim
28 words
The method of claim 1, wherein the leachable catalyst is selected from the group of organic acids consisting of citric acid, malic acid, ethylenediaminetetraacetic acid, and sorbic acid.
Claim 7
Dependent Claim
18 words
The method of claim 1, wherein the leachable catalyst is applied to the web simultaneously with the binder.
Claim 8
Dependent Claim
31 words
The method of claim 1, wherein the amount of the leachable catalyst applied to the web is in the range of about 0.1% to about 5.0% by weight of the web.
Claim 9
Independent Claim
108 words
A method for making an antimicrobially active, air-laid non-woven web comprising the steps of: (a) air laying an unbonded cellulosic fiber web; (b) applying throughout the unbonded cellulosic fiber web an uncured polymeric binder; (c) applying a leachable catalyst to the web to catalyze the cross-linking of the binder during curing, the leachable catalyst being antimicrobial and present in an amount effective to render the cured web antimicrobial and selected from the group consisting of citric acid, malic acid, ethylenediaminetetraacetic acid, and sorbic acid; and (d) curing the binder material to cross-link the binder and bind the cellulosic fibers together to form an antimicrobially active, air-laid, non-woven web.
Claim 10
Independent Claim
108 words
A method for making an antimicrobially active, air-laid non-woven web comprising the steps of: (a) air laying an unbonded cellulosic fiber web; (b) applying throughout the unbonded cellulosic fiber web an uncured polymeric binder; (c) applying a leachable catalyst to the web to catalyze the cross-linking of the binder during curing, the leachable catalyst being antimicrobial and present in an amount effective to render the cured web antimicrobial and selected from the group consisting of citric acid, malic acid, ethylenediaminetetraacetic acid, and sorbic acid; and (d) curing the binder material to cross-link the binder and bind the cellulosic fibers together to form an antimicrobially active, air-laid, non-woven web.
Claim 11
Dependent Claim
13 words
The method of claim 8, wherein the polymeric binder is a latex binder.
Claim 12
Dependent Claim
27 words
The method of claim 8, wherein the polymeric binder comprises at least one binder selected from the group consisting of anionic binders, nonionic binders, and cationic binders.
Claim 13
Dependent Claim
31 words
The method of claim 8, wherein the amount of the leachable catalyst applied to the web is in the range of about 0.1% to about 5.0% by weight of the web.
References Cited (Backward Citations)
US4737405A
Cited
US4740398A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-20 | 1992-03-21 | 1992-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-20 | 1996-03-21 | 1996-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-20 | 2000-03-21 | 2000-09-20 | $7700.00 | Window Closed / Lapsed |