US4837079A
Expired / Lapsed
US
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Antimicrobially active, non-woven web used in a wet wiper
Assignee: Fort James Corp
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Filing: 1988-09-09
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Granted: 1989-06-06
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Expires: 2008-09-09
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 unbounded fibrous web; applying throughout the unbonded fibrous web an uncured binder and polyhexamethylene biguanide hydrochloride as an antimicrobial agent, the antimicrobial active agent being substantive to the fibers of the web and to the binder; and curing the binder material to bind the fibers together to form an antimicrobially active, non-woven web.
Inventors
- 👤 Thomas E. Quantrille
- 👤 Dale H. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:13
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/36; A; A61; A61L; A61L2/00; A61L2/16; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T442/00; Y10T442/20; Y10T442/2525
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
103 words
A method for making an antimicrobially active, non-woven web comprising the steps of: (a) forming an unbounded fibrous web; (b) applying throughout the unbonded fibrous web an uncured binder and polyhexamethylene biguanide hydrochloride as an antimicrobial agent, the polyhexamethylene biguanide hydrochloride being substantive to the fibers of the web and to the binder when the web is either wet or dry to prevent the antimicrobial agent from substantially diffusing from the fibers or binder and being present in an amount effective to act as antimicrobial agent; and (c) curing the binder to bind the fibers together to form an antimicrobially active, non-woven web.
Claim 2
Independent Claim
103 words
A method for making an antimicrobially active, non-woven web comprising the steps of: (a) forming an unbounded fibrous web; (b) applying throughout the unbonded fibrous web an uncured binder and polyhexamethylene biguanide hydrochloride as an antimicrobial agent, the polyhexamethylene biguanide hydrochloride being substantive to the fibers of the web and to the binder when the web is either wet or dry to prevent the antimicrobial agent from substantially diffusing from the fibers or binder and being present in an amount effective to act as antimicrobial agent; and (c) curing the binder to bind the fibers together to form an antimicrobially active, non-woven web.
Claim 3
Dependent Claim
22 words
The method of claim 1, wherein the fibers are selected from the group consisting of cellulosic fibers, synthetic fibers, and combinations thereof.
Claim 4
Dependent Claim
12 words
The method of claim 1, wherein the binder is a polymeric binder.
Claim 5
Dependent Claim
13 words
The method of claim 3, wherein the polymeric binder is a latex binder.
Claim 6
Dependent Claim
32 words
The method of claim 1, wherein the amount of the polyhexamethylene biguanide hydrochloride applied to the web is in the range of about 0.25% to about 3% of the total web weight.
Claim 7
Dependent Claim
30 words
The method of claim 1, wherein the amount of the binder applied to the web is in the range of about 5% to about 30% of the total web weight.
Claim 8
Dependent Claim
14 words
The method of claim 1, wherein the unbonded fibrous web is formed by air-laying.
Claim 9
Dependent Claim
14 words
The method of claim 1, wherein the unbonded fibrous web is formed by wet-laying.
Claim 10
Dependent Claim
99 words
An antimicrobially active, wet wiper comprising: (a) an antimicrobially active non-woven web comprising: (i) bonded fibers; (ii) a binder distributed throughout the fibers in an amount effective to bind the fibers; (iii) polyhexamethylene biguanide hydrochloride being substantive to the fibers and to the binder when the web is either wet or dry to prevent the polyhexamethylene biguanide hydrochloride from substantially diffusing from the fibers or the binder and being present in an amount effective to act as an antimicrobial agent; and (b) a substantially preservative free liquid in which the web is maintained in a wet condition until use.
Claim 11
Dependent Claim
99 words
An antimicrobially active, wet wiper comprising: (a) an antimicrobially active non-woven web comprising: (i) bonded fibers; (ii) a binder distributed throughout the fibers in an amount effective to bind the fibers; (iii) polyhexamethylene biguanide hydrochloride being substantive to the fibers and to the binder when the web is either wet or dry to prevent the polyhexamethylene biguanide hydrochloride from substantially diffusing from the fibers or the binder and being present in an amount effective to act as an antimicrobial agent; and (b) a substantially preservative free liquid in which the web is maintained in a wet condition until use.
Claim 12
Dependent Claim
23 words
The wet wiper of claim 9, wherein the fibers are selected from the group consisting of cellulosic fibers, synthetic fibers, and combinations thereof.
Claim 13
Dependent Claim
13 words
The wet wiper of claim 9, wherein the binder is a polymeric binder.
Claim 14
Dependent Claim
14 words
The wet wiper of claim 9, wherein the substantially preservative free liquid is water.
Claim 15
Dependent Claim
21 words
The wet wiper of claim 9, wherein the binder and the polyhexamethylene biguanide hydrochloride are substantially uniformly distributed on the fibers.
Claim 16
Dependent Claim
29 words
The wet wiper of claim 9, wherein the amount of the polyhexamethylene biguanide hydrochloride is in the range of about 0.25 to about 3% of the total web weight.
Claim 17
Dependent Claim
73 words
An antimicrobially active, non-woven web comprising: (a) bonded fibers; (b) a binder distributed throughout the fibers in an amount effective to bind the fibers; and (c) polyhexamethylene biguanide hydrochloride being substantive to the fibers and to the binder when the web is either wet or dry to prevent the polyhexamethylene biguanide hydrochloride from substantially diffusing from the fibers or the binder and being present in about effective to act as an antimicrobial agent.
Claim 18
Dependent Claim
73 words
An antimicrobially active, non-woven web comprising: (a) bonded fibers; (b) a binder distributed throughout the fibers in an amount effective to bind the fibers; and (c) polyhexamethylene biguanide hydrochloride being substantive to the fibers and to the binder when the web is either wet or dry to prevent the polyhexamethylene biguanide hydrochloride from substantially diffusing from the fibers or the binder and being present in about effective to act as an antimicrobial agent.
Claim 19
Dependent Claim
18 words
The web of claim 15, wherein binder and polyhexamethylene biguanide hydrochloride are substantially uniformly distributed on the fiber.
Claim 20
Dependent Claim
22 words
The web of claim 15, wherein the fibers are selected from the group consisting of cellulosic fibers, synthetic fibers, and combinations thereof.
Claim 21
Dependent Claim
12 words
The web of claim 15, wherein the binder is a polymeric binder.
Claim 22
Dependent Claim
28 words
The web of claim 15, wherein the amount of the polyhexamethylene biguanide hydrochloride is in the range of about 0.25% to about 3% of the total web weight.
Claim 23
Dependent Claim
26 words
The web of claim 15, wherein the amount of the binder is in the range of about 5% to about 30% of the total web weight.
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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) | 1992-06-05 | 1992-12-05 | 1993-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-05 | 1996-12-05 | 1997-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-05 | 2000-12-05 | 2001-06-06 | $7700.00 | Window Closed / Lapsed |