US4943473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible laminated fluoropolymer-containing composites
Assignee: Saint Gobain Performance Plastics Corp
•
Filing: 1988-10-04
•
Granted: 1990-07-24
•
Expires: 2008-10-04
Abstract
Abstract Fire and chemical resistant, flexible composites are made from flexible woven, non-woven and knitted substrates and fluoropolymer containing films. Adhesives, such as melt adhesives, may be used in making the composites. The composites are suitable for use in protective garments, and in other articles where flexible chemically resistant materials are needed. A seaming technique for use in protective articles is described.
Inventors
- 👤 Ronald A. Sahatjian
- 👤 Robert C. Ribbins, III
- 👤 Mark G. Steckel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:45
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; A; A41; A41D; A41D27/00; A41D27/24; A41D27/245; A62; A62D; A62D5/00; B32B27/12; B32B27/32; B32B27/322; B32B5/00; B32B5/02; B32B5/022; B32B5/024; B32B5/026; B32B7/00; B32B7/04; B32B7/12; D; D06; D06N; D06N3/00; D06N3/04; D06N3/047; B32B2307/00; B32B2307/30; B32B2307/306; B32B2307/3065; B32B2327/00; B32B2571/00; B32B2571/02; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T442/00; Y10T442/30; Y10T442/3854; Y10T442/3878
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
92 words
A flexible chemically-resistant protective article having improved barrier properties made from a fluoropolymer laminate composite comprising a flexible fabric substrate and a protective coating lamintaed to at least one side of the said substrate with a melt-bondable fluoropolymer adhesive interlayer, said protective coating having a thickness of less than about 5 mil and comprising a fluoro polymer selected from the group consisting of polytetrafluoroethylene, fluorinated ethylene propylene copolymer, polychlorotrifluoroethylene, copolymers of chlorotrifluoroethylen and tetrafluoroethylene, copolymers of chlorotrifluorethylene and vinylidene fluoride, copolymers of ethylene and tetrafluoroethylene, chlorotrifluoroethylene, perfluoroalkyl vinyl ethers, polyvinylidenefluoride and polyvinylfluoride.
Claim 2
Dependent Claim
92 words
A flexible chemically-resistant protective article having improved barrier properties made from a fluoropolymer laminate composite comprising a flexible fabric substrate and a protective coating lamintaed to at least one side of the said substrate with a melt-bondable fluoropolymer adhesive interlayer, said protective coating having a thickness of less than about 5 mil and comprising a fluoro polymer selected from the group consisting of polytetrafluoroethylene, fluorinated ethylene propylene copolymer, polychlorotrifluoroethylene, copolymers of chlorotrifluoroethylen and tetrafluoroethylene, copolymers of chlorotrifluorethylene and vinylidene fluoride, copolymers of ethylene and tetrafluoroethylene, chlorotrifluoroethylene, perfluoroalkyl vinyl ethers, polyvinylidenefluoride and polyvinylfluoride.
Claim 3
Dependent Claim
40 words
A protective article according to claim 1, wherein the substrate is formed from a material selected from the group consisting of glass, ceramics, graphite, polybenzimidazole, polytetafluoroethylene, polyaramides, metal wire, polyolefins, polyesters, polyamides, thermoplastics, polyether sulfones, polyether ketones, and cotton cloth.
Claim 4
Dependent Claim
14 words
A protective article according to claim 1, comprising clothing, a shelter or a covering.
Claim 5
Dependent Claim
16 words
A protective article according to claim 1, wherein the substrate and the article are fire resistant.
Claim 6
Dependent Claim
14 words
A protective article according to claim 4, comprising clothing, a shelter or a covering.
Claim 7
Dependent Claim
16 words
A protective article according to claim 1, wherein the adhesive interlayer comprises fluorinated ethylene propylene copolymer.
Claim 8
Dependent Claim
18 words
A protective article according to claim 6, wherein the adhesive interlayer further comprises a fluoroelastomer or a fluoroplastic.
Claim 9
Dependent Claim
13 words
A protective article according to claim 1, wherein the coating is a film.
Claim 10
Dependent Claim
25 words
A protective article according to claim 8, wherein the film further comprises a layer of perfluoroalkyl ether which forms an outer surface of the laminate.
Claim 11
Dependent Claim
33 words
A protective article according to claim 1, which is a garment and which comprises a perfluorinated tetrafluoroethylene-containing polymer laminated to at least one face of a substrate with a melt-bondable fluoropolymer adhesive interlayer.
Claim 12
Dependent Claim
12 words
A protective garment according to claim 10, wherein the fluoropolymer is polytetrafluoroethylene.
Claim 13
Dependent Claim
15 words
A protective garment according to claim 10, wherein the fluoropolymer is fluorinated ethylene propylene copolymer.
Claim 14
Dependent Claim
16 words
A protective garment according to claim 10, wherein the adhesive layer comprises fluorinated ethylene propylene copolymer.
Claim 15
Dependent Claim
15 words
A protective garment according to claim 13, wherein the adhesive layer further comprises a fluoroelastomer.
Claim 16
Dependent Claim
29 words
A protective garment according to claim 14, wherein the protective coating is a film further comprising a layer of perfluoroalkyl ether which forms an outer surface of the laminate.
Claim 17
Dependent Claim
14 words
A protective garment according to claim 15, wherein the substrate is a polyaramide textile.
References Cited (Backward Citations)
US3513064A
Cited
US3579370A
Cited
US3899622A
Cited
US4013812A
Cited
US4168298A
Cited
US4165404A
Cited
US4194041A
Cited
US4272851A
Cited
US4399183A
Cited
US4347268A
Cited
US4421878A
Cited
US4423183A
Cited
US4443511A
Cited
US4770927A
Cited
US4487878A
Cited
US4490501A
Cited
US4495248A
Cited
US4495247A
Cited
US4506054A
Cited
US4452848A
Cited
US4555543A
Cited
US4610918A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-23 | 1994-01-22 | 1994-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-23 | 1998-01-22 | 1998-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-23 | 2002-01-22 | 2002-07-24 | $7700.00 | Window Closed / Lapsed |