US5045133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Health care laminate
Assignee: Kimberly Clark Worldwide Inc
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Filing: 1988-12-14
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Granted: 1991-09-03
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Expires: 2008-12-14
Abstract
Abstract There is disclosed nonwoven composite fabric comprising a central melt-blown web preferably formed of collected, entangled, elastic or adhesive nonwoven fibers comprising poly (ethylene-vinyl acetate), where the central web is polar and of relatively low melting point. This central web is positioned next to or bonded to two other insulative nonwoven webs of non-polar, melt-blown fibers, which in turn are positioned next to or bonded to two outer nonwoven webs of spun-bonded fibers. The composites are useful for health care fabrics such as drapes, protective covers, and the like.
Inventors
- 👤 Diego H. Daponte
- 👤 Norman K. Fox
- 👤 Robert A. Funk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:18
CPC Classifications
D; D06; D06M; D06M17/00; B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; D04; D04H; D04H1/00; D04H1/40; D04H1/54; D04H1/56; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1023
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
109 words
A process for producing a non-woven health care laminate comprising the steps of: (a) forming a first outer layer of spun-bonded filaments of a non-polar polymer; (b) depositing thereon a first insulative layer of melt-blown fibers of a non-polar polymer; (c) depositing thereon a central layer of melt-blown fibers of a polar polymer; (d) depositing thereon a second insulative layer of melt-blown fibers of a non-polar polymer; (e) depositing thereon a second outer layer of spun-bonded filaments of a non-polar polymer; (f) laminating the layers together to form the laminate; and (g) treating the laminate with a fluorocarbon suspended in an alcohol and driving off the alcohol with heat.
Claim 2
Dependent Claim
109 words
A process for producing a non-woven health care laminate comprising the steps of: (a) forming a first outer layer of spun-bonded filaments of a non-polar polymer; (b) depositing thereon a first insulative layer of melt-blown fibers of a non-polar polymer; (c) depositing thereon a central layer of melt-blown fibers of a polar polymer; (d) depositing thereon a second insulative layer of melt-blown fibers of a non-polar polymer; (e) depositing thereon a second outer layer of spun-bonded filaments of a non-polar polymer; (f) laminating the layers together to form the laminate; and (g) treating the laminate with a fluorocarbon suspended in an alcohol and driving off the alcohol with heat.
Claim 3
Dependent Claim
19 words
The process of claim 1, wherein each insulative layer has a basis weight greater than 0.10 oz/yd 2 .
Claim 4
Dependent Claim
28 words
The process of claim 2, wherein the polar polymer is selected from the group consisting of poly (ethylene-vinyl acetate), poly (ethylene-ethyl acrylate), poly (ethylene-acrylic acid), poly (ethylene-methyl acrylate).
Claim 5
Dependent Claim
32 words
The process of claim 2 or 3, wherein the non-polar polymers are selected from the group consisting of polypropylene, polyethylene, random co-polymers of ethylene and propylene, and blends of polypropylene and polyethylene.
References Cited (Backward Citations)
US4041203A
Cited
US4115605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-02 | 1995-03-04 | 1995-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-02 | 1999-03-04 | 1999-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-02 | 2003-03-04 | 2003-09-03 | $7700.00 | Window Closed / Lapsed |