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US4655756A
Expired / Lapsed
US
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Treated non-woven material
Assignee: Syngenta Ltd
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Filing: 1985-09-03
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Granted: 1987-04-07
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Expires: 2005-09-03
Abstract
Abstract There is disclosed a non-woven material having a superficial coating of a linear polymeric biguanide in which the recurring unit is of the formula <IMAGE>I wherein X and Y, which may be the same or different, represent bridging groups in which the total number of carbon atoms in X and Y taken together, directly interposed between the pairs of nitrogen atoms linked thereby, is from 10 to 16, or the salt thereof with an acid. Preferably the polymeric biguanide is polyhexamethylene biguanide dihydrochloride. The material is useful in the form of an article designed for the collection of human body emissions, more particularly disposable nappies to avoid bacterial activity.
Inventors
- 👤 David M. Fawkes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:52
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/36; A; A01; A01N; A01N47/00; A01N47/40; A01N47/42; A01N47/44; A61; A61L; A61L15/00; A61L15/16; A61L15/20; A61L15/42; A61L15/46; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T442/00; Y10T442/20; Y10T442/2484
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
69 words
A non-woven material treated with a linear polymeric biguanide in which the recurring unit is of the formula: ##STR3## wherein X and Y, which may be the same or different, represent bridging groups in which the total number of carbon atoms in X and Y taken together, directly interposed between the pairs of nitrogen atoms linked thereby, is from 10 to 16, or the salt thereof with an acid.
Claim 2
Dependent Claim
69 words
A non-woven material treated with a linear polymeric biguanide in which the recurring unit is of the formula: ##STR3## wherein X and Y, which may be the same or different, represent bridging groups in which the total number of carbon atoms in X and Y taken together, directly interposed between the pairs of nitrogen atoms linked thereby, is from 10 to 16, or the salt thereof with an acid.
Claim 3
Dependent Claim
23 words
A non-woven material according to claim 1 wherein the groups X and Y are polymethylene groups containing from 3 to 12 carbon atoms.
Claim 4
Dependent Claim
14 words
A non-woven material according to claim 1 wherein X and Y are hexamethylene groups.
Claim 5
Dependent Claim
21 words
A non-woven material according to claim 1 wherein the polymeric biguanide has a molecular weight in the range 500 to 20,000.
Claim 6
Dependent Claim
18 words
A non-woven material according to claim 1 wherein the polymeric biguanide contains from 5 to 12 biguanide units.
Claim 7
Dependent Claim
22 words
A non-woven material according to claim 1 wherein the polymeric biguanide is present at a concentration ranging from 500 to 5000 ppm.
Claim 8
Dependent Claim
25 words
A non-woven material according to claim 1 wherein the polymeric biguanide is a mixture of polyhexamethyle biguanide dihydrochlorides having number average molecular weights from 1300-2200.
Claim 9
Dependent Claim
20 words
A non-woven material according to claim 1 in the form of an article for the collection of human body emissions.
Claim 10
Dependent Claim
26 words
A non-woven material according to claim 8 wherein the article is a disposable nappy, a disposable feminine hygiene pad, a paper handkerchief or an incontinence pad.
References Cited (Backward Citations)
US4401712A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-06 | 1990-10-06 | 1991-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-06 | 1994-10-06 | 1995-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-06 | 1998-10-06 | 1999-04-07 | $7700.00 | Window Closed / Lapsed |