US4865903A
Expired / Lapsed
US
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Chemically resistant composite structures and garments produced therefrom
Assignee: Pall Corp
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Filing: 1987-12-09
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Granted: 1989-09-12
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Expires: 2007-12-09
Abstract
Abstract A flexible, impermeable, universally chemically resistant composite structure which may be fabricated into protective clothing useful, for example, in the handling and clean up of hazardous chemicals is provided for, which composite structure comprises a fabric substrate, and thermally-melt-bonded on both sides thereof, a coated film, which coated film comprises a PTFE film having a thermoplastic fluoropolymer coating on both sides thereof. Preferably, the fabric substrate of the composite structure has been treated with an antiwicking agent. A method for forming such composite structures is provided for, which method comprises thermally-melt-bonding a PTFE film having a thermoplastic fluoropolymer coating on both sides thereof to each side of a fabric substrate. Articles of protective clothing are also provided for which are fabricated from the subject composite structures.
Inventors
- 👤 Joseph G. Adiletta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:46
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; A; A41; A41D; A41D31/00; A41D31/04; A41D31/10; A41D31/102; A62; A62B; A62B17/00; A62B17/006; A62D; A62D5/00; B32B27/06; B32B27/08; B32B27/32; B32B27/322; B32B5/00; B32B5/02; B32B5/022; B32B5/024; B32B5/026; A41D2300/00; A41D2300/50; A41D2300/52; B32B2262/00; B32B2262/02; B32B2262/0261; B32B2327/00; B32B2327/12; B32B2327/18; B32B2437/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T442/00; Y10T442/30; Y10T442/3854; Y10T442/3878
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
47 words
A composite structure suitable for use as material for articles of protective clothing, which composite structure comprises a fabric substrate, and thermally-melt-bonded on both sides thereof, a coated film, which coated film consists essentially of a PTFE film having a thermoplastic fluoropolymer coating on both sides thereof.
Claim 2
Dependent Claim
47 words
A composite structure suitable for use as material for articles of protective clothing, which composite structure comprises a fabric substrate, and thermally-melt-bonded on both sides thereof, a coated film, which coated film consists essentially of a PTFE film having a thermoplastic fluoropolymer coating on both sides thereof.
Claim 3
Dependent Claim
80 words
The composite structure of claim 1, wherein said fabric substrate has a thickness of from about 0.010 to about 0.200", and a weight of from about 2.0 to about 10.0 oz/sy, said PTFE film has a thickness of from about 0.0013 to about 0.003", and a weight from about 2.6 to about 6.0 oz/sy, and said thermoplastic fluoropolymer coating has a thickness of from about 0.0001 to about 0.0019", and a weight of from about 0.20 to about 2.0 oz/sy.
Claim 4
Dependent Claim
37 words
The composite structure of claim 1, wherein said thermoplastic polymer coating comprises a thermoplastic fluoropolymer selected from the group consisting of fluorinated ethylene/propylene copolymers, tetrafluoroethylene/ethylene copolymers, tetrafluoroethylene/perfluorovinyl ether copolymers, polychlorotrifluoroethylene, poly(vinyl fluoride), poly(vinylidene fluoride), and mixtures thereof.
Claim 5
Dependent Claim
11 words
An article of clothing comprising the composite structure of claim 1.
Claim 6
Dependent Claim
24 words
The composite structure of claim 1, wherein said fabric substrate is selected from the group consisting of polyaramide and polyimide fabrics, and blends thereof.
Claim 7
Dependent Claim
37 words
The composite structure of claim 5, wherein said thermoplastic polymer coating comprises a thermoplastic fluoropolymer selected from the group consisting of fluorinated ethylene/propylene copolymers, tetrafluoroethylene/ethylene copolymers, tetrafluoroethylene/perfluorovinyl ether copolymers, polychlorotrifluoroethylene, poly(vinyl fluoride), poly(vinylidene fluoride), and mixtures thereof.
Claim 8
Dependent Claim
80 words
The composite structure of claim 5, wherein said fabric substrate has a thickness of from about 0.010 to about 0.200", and a weight of from about 2.0 to about 10.0 oz/sy, said PTFE film has a thickness of from about 0.0013 to about 0.003", and a weight from about 2.6 to about 6.0 oz/sy, and said thermoplastic fluoropolymer coating has a thickness of from about 0.0001 to about 0.0019", and a weight of from about 0.20 to about 2.0 oz/sy.
Claim 9
Dependent Claim
17 words
The composite structure of claim 1, wherein said fabric substrate has been treated with an antiwicking agent.
Claim 10
Dependent Claim
24 words
The composite structure of claim 8, wherein said fabric substrate is selected from the group consisting of polyaramide and polyimide fabrics, and blends thereof.
Claim 11
Dependent Claim
37 words
The composite structure of claim 8, wherein said thermoplastic polymer coating comprises a thermoplastic fluoropolymer selected from the group consisting of fluorinated ethylene/propylene copolymers, tetrafluoroethylene/ethylene copolymers, tetrafluoroethylene/perfluorovinyl ether copolymers, polychlorotrifluoroethylene, poly(vinyl fluoride), poly(vinylidene fluoride), and mixtures thereof.
Claim 12
Dependent Claim
80 words
The composite structure of claim 8, wherein said fabric substrate has a thickness of from about 0.010 to about 0.200", and a weight of from about 2.0 to about 10.0 oz/sy, said PTFE film has a thickness of from about 0.0013 to about 0.003", and a weight from about 2.6 to about 6.0 oz/sy, and said thermoplastic fluoropolymer coating has a thickness of from about 0.0001 to about 0.0019", and a weight of from about 0.20 to about 2.0 oz/sy.
Claim 13
Dependent Claim
30 words
The composite structure of claim 8, wherein said antiwicking agent is a composition comprising a fluorinated ethylene/propylene, copolymer, a polymeric fluoroaliphatic ester, a dispersant, a wetting/saturating agent, and a carrier.
Claim 14
Dependent Claim
24 words
The composite structure of claim 12, wherein said fabric substrate is selected from the group consisting of polyaramide and polyimide fabrics, and blends thereof.
Claim 15
Dependent Claim
28 words
The composite structure of claim 8, wherein said antiwicking agent is a composition comprising a fluorinated ethylene/propylene copolymer, a polymeric fluoroaliphatic ester, a carrier liquid, and a dispersant.
Claim 16
Dependent Claim
37 words
The composite structure of claim 14, wherein said thermoplastic polymer coating comprises a thermoplastic fluoropolymer selected from the group consisting of fluorinated ethylene/propylene copolymers, tetrafluoroethylene/ethylene copolymers, tetrafluoroethylene/perfluorovinyl ether copolymers, polychlorotrifluoroethylene, poly(vinyl fluoride), poly(vinylidene fluoride), and mixtures thereof.
Claim 17
Dependent Claim
80 words
The composite structure of claim 14, wherein said fabric substrate has a thickness of from about 0.010 to about 0.200", and a weight of from about 2.0 to about 10.0 oz/sy, said PTFE film has a thickness of from about 0.0013 to about 0.003", and a weight from about 2.6 to about 6.0 oz/sy, and said thermoplastic fluoropolymer coating has a thickness of from about 0.0001 to about 0.0019", and a weight of from about 0.20 to about 2.0 oz/sy.
Claim 18
Dependent Claim
24 words
The composite structure of claim 14, wherein said fabric substrate is selected from the group consisting of polyaramide and polyimide fabrics, and blends thereof.
Claim 19
Dependent Claim
37 words
The composite structure of claim 17, wherein said thermoplastic polymer coating comprises a thermoplastic fluoropolymer selected from the group consisting of fluorinated ethylene/propylene copolymers, tetrafluoroethylene/ethylene copolymers, tetrafluoroethylene/perfluorovinyl ether copolymers, polychlorotrifluoroethylene, poly(vinyl fluoride), poly(vinylidene fluoride), and mixtures thereof.
Claim 20
Dependent Claim
80 words
The composite structure of claim 17, wherein said fabric substrate has a thickness of from about 0.010 to about 0.200", and a weight of from about 2.0 to about 10.0 oz/sy, said PTFE film has a thickness of from about 0.0013 to about 0.003", and a weight from about 2.6 to about 6.0 oz/sy, and said thermoplastic fluoropolymer coating has a thickness of from about 0.0001 to about 0.001", and a weight of from about 0.20 to about 2.0 oz/sy.
Claim 21
Dependent Claim
48 words
A composite structure suitable for use as material for articles of protective clothing, which composite structure comprises a fabric substrate, and thermally-melt-bonded on both sides thereof, a coated film, which coated film consists essentially of a PTFE film having a thermoplastic fluoropolymer coating on the inner side thereof.
Claim 22
Dependent Claim
48 words
A composite structure suitable for use as material for articles of protective clothing, which composite structure comprises a fabric substrate, and thermally-melt-bonded on both sides thereof, a coated film, which coated film consists essentially of a PTFE film having a thermoplastic fluoropolymer coating on the inner side thereof.
Claim 23
Dependent Claim
11 words
An article of clothing comprising the composite structure of claim 20.
Claim 24
Dependent Claim
44 words
A composite structure suitable for use as material for articles of protective clothing, which composite structure comprises a fabric substrate, and on both sides thereof, a thermoplastic fluoropolymer film and a PTFE film, wherein said thermoplastic fluoropolymer thermally-melt-bonds said PTFE film to said substrate.
Claim 25
Dependent Claim
44 words
A composite structure suitable for use as material for articles of protective clothing, which composite structure comprises a fabric substrate, and on both sides thereof, a thermoplastic fluoropolymer film and a PTFE film, wherein said thermoplastic fluoropolymer thermally-melt-bonds said PTFE film to said substrate.
Claim 26
Dependent Claim
11 words
An article of clothing comprising the composite structure of claim 22.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |