US4411928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for applying a water and alcohol repellent microbiocidal finish to a fabric and product so produced
Assignee: American Hospital Supply Corp
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Filing: 1982-02-24
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Granted: 1983-10-25
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Expires: 2002-02-24
Abstract
Abstract Non-woven fabrics are rendered repellent to water, saline, body fluids and solvents according to the disclosed process that applied bioactive finish that becomes substantive on the fabric and serves to destroy migrating and cross-contaminating bacteria, algae and fungi. The finish serves to lower the amount of microbial contamination while providing a barrier to liquid penetration. Fabrics so treated are useful as surgeon's gowns, medical drapes, isolation gowns, instrument wraps and the like.
Inventors
- 👤 A. Frank Baldwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:21
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/00051; A61F13/00063; A61B; A61B42/00; A61B46/00; A61B46/40; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/46; A61L15/52; D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/55; D06M16/00; A61F13/15; A61F13/84; A61F13/8405; A61F2013/00361; A61F2013/00727; A61F2013/00731; A61F2013/00744; A61F2013/00902; A61F2013/0091; A61F2013/15008; A61F2013/15048; A61F13/15577; A61F2013/15821
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
82 words
A process for making a bioactive, water and alcohol repellent medical fabric comprising the steps of: (a) applying a finishing bath composed, in percent by weight of the bath, of: ______________________________________
a C.sub.1 -C.sub.4 alcohol
0.5-3.0%
3-(trimethoxysilyl)-
propyloctadecyl dimethyl
ammonium chloride 0.4-2.4%
a fluoropolymer alcohol repellent
1.25-5.0%
wax/resin fluoropolymer extender
1.0-6.0%
monovalent salt antistat
0.2-0.5%
water balance
______________________________________ (b) drying the thus coated substrate to fix the coating to the non-woven substrate and provide a bioactive, water and alcohol repellent finished fabric.
Claim 2
Dependent Claim
82 words
A process for making a bioactive, water and alcohol repellent medical fabric comprising the steps of: (a) applying a finishing bath composed, in percent by weight of the bath, of: ______________________________________
a C.sub.1 -C.sub.4 alcohol
0.5-3.0%
3-(trimethoxysilyl)-
propyloctadecyl dimethyl
ammonium chloride 0.4-2.4%
a fluoropolymer alcohol repellent
1.25-5.0%
wax/resin fluoropolymer extender
1.0-6.0%
monovalent salt antistat
0.2-0.5%
water balance
______________________________________ (b) drying the thus coated substrate to fix the coating to the non-woven substrate and provide a bioactive, water and alcohol repellent finished fabric.
Claim 3
Dependent Claim
24 words
The process of claim 1 wherein the finishing bath is applied in step (a) at about 100 to about 130% wet add-on before drying.
Claim 4
Dependent Claim
26 words
The process of claim 1 or 2 wherein step (b) is conducted at a temperature in the range of about 325° F. to about 400° F.
Claim 5
Dependent Claim
29 words
The process of claim 1 wherein said substrate is a spunlaced non-woven fabric containing from about 55 to 75% by weight cellulose and about 45 to about 25% polyester.
Claim 6
Dependent Claim
97 words
A process for imparting bioactive, water repellent and alcohol repellent properties to a non-woven cellulose-containing fabric comprising the steps of: (i) applying a bioactive amount of a silyl quaternary amine compound of the formula: ##STR2## wherein R is C 11 -C 22 alkyl group and R 1 is bromine or chlorine; together with an alcohol and water repellent amount of a mixture of a fluoropolymer repellent composition with a resin/wax fluoropolymer extender, and (ii) drying the thus coated fabric to produce a bioactive, water-repellent, alcohol-repellent fabric having the bioactive material attached thereto and substantially completely non-leachable therefrom.
Claim 7
Dependent Claim
97 words
A process for imparting bioactive, water repellent and alcohol repellent properties to a non-woven cellulose-containing fabric comprising the steps of: (i) applying a bioactive amount of a silyl quaternary amine compound of the formula: ##STR2## wherein R is C 11 -C 22 alkyl group and R 1 is bromine or chlorine; together with an alcohol and water repellent amount of a mixture of a fluoropolymer repellent composition with a resin/wax fluoropolymer extender, and (ii) drying the thus coated fabric to produce a bioactive, water-repellent, alcohol-repellent fabric having the bioactive material attached thereto and substantially completely non-leachable therefrom.
Claim 8
Dependent Claim
16 words
The process of claim 5 wherein the silyl quaternary amine is 3-(trimethoxysilyl)-propyloctadecane or a salt thereof.
Claim 9
Dependent Claim
30 words
The process of claim 5 or 6 wherein the fabric is a spunlaced non-woven fabric containing from about 55 to 75% by weight cellulose and about 45 to 25% polyester.
Claim 10
Dependent Claim
14 words
The water and alcohol repellent bioactive fabric produced by the process of claim 1.
Claim 11
Dependent Claim
14 words
The water and alcohol repellent bioactive fabric produced by the process of claim 5.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-24 | 1987-04-25 | 1987-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-24 | 1991-04-25 | 1991-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-24 | 1995-04-25 | 1995-10-25 | $7700.00 | Window Closed / Lapsed |