US5554425A Expired / Lapsed US ⏱️ 0.0 years remaining

Fluoropolymer composite tube and method of preparation

Assignee: MARTINREA INDUSTRIES Inc

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Filing: 1995-03-14

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Granted: 1996-09-10

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Expires: 2015-03-14

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Abstract

Abstract Described herein is a method of preparing a fluoropolymer composite tube comprising the steps of activating a formed fluoropolymer substrate by subjecting the substrate to a charged gaseous atmosphere formed by electrically ionizing a gas which contacts the substrate and thereafter applying a layer of a thermoplastic polymer to the activated fluoropolymer substrate. The ionizing step can be described as a corona discharge or an electrically formed plasma. In particular, described is a fuel pipe comprised of an inner fluorocarbon layer having electrostatic discharge resistance and hydrocarbon evaporative emission resistance and on top of and integral with, the fluorocarbon layer an outer layer of a thermoplastic polymer. Fluoropolymer layers have excellent chemical resistance.

Inventors

👤 Edward K. Krause
👤 Kenneth J. Kuenzel

Bibliographic Details

Application Number —

Jurisdiction US

Data Source google_patents

Last Synchronized 2026-11-04 00:33

CPC Classifications

B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B29; B29C; B29C48/00; B29C48/001; B29C48/0013; B29C48/0015; B29C48/0016; B29C48/022; B29C48/16; B29C48/18; B29C48/21; B29C48/25; B29C48/30; B29C48/32; B29C48/34; B29C48/36; B29C48/50; B29C48/695; B29C48/70; B29C48/705; B29C59/00; B29C59/08; B29C59/085; B29C59/10; B29C59/103; B29C59/14; B29C59/142; B32B1/00; B32B1/08; B32B27/32; B32B27/322; B32B27/34; B32B7/00; B32B7/04; F; F16; F16L; F16L11/00; F16L11/04; F16L11/12; F16L11/127; F16L9/00; F16L9/12; F16L9/121; F16L9/125; B29C48/03; B29C48/09; B29C48/12; B29K; B29K2027/00; B29K2027/12; B29K2027/18; B29K2077/00; B29K2301/00; B29K2301/10; B29L; B29L2009/00; B29L2023/00; B29L2023/22; B32B2597/00; F16L2011/047; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/139; Y10T428/1393; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31725; Y10T428/3175

Claims Analysis

Total Claims: 11

Claim 1

Independent Claim 72 words

A composite prepared by a process comprising the steps of: (1) chemically activating a formed fluoropolymer substrate by subjecting the substrate to a charged, substantially non-inert gaseous atmosphere formed by electrically ionizing a gas which contacts the substrate; and (2) thereafter chemically bonding a layer of a thermoplastic polymer to a smooth, void-free outer surface of said fluoropolymer substrate by applying said layer of thermoplastic polymer to the chemically activated fluoropolymer substrate.

Claim 2

Dependent Claim 72 words

Claim 3

Dependent Claim 30 words

The composite of claim 1 wherein said fluoropolymer substrate is comprised of an inner conductive fluoropolymer layer and an outer non-conductive fluoropolymer layer to which said thermoplastic polymer is applied.

Claim 4

Dependent Claim 16 words

The composite of claim 1 wherein said thermoplastic polymer is melt extruded onto said fluoropolymer layer.

Claim 5

Dependent Claim 19 words

The composite of claim 1 wherein said fluoropolymer is ethylene tetrafluoroethylene polymer and said thermoplastic polymer is a nylon.

Claim 6

Dependent Claim 12 words

The composite of claim 1 wherein said thermoplastic polymer is a polyamide.

Claim 7

Dependent Claim 25 words

The composite of claim 2 wherein said fluoropolymer layers are co-extruded and said thermoplastic polymer layer is melt extruded onto said outer non-conductive fluoropolymer layer.

Claim 8

Dependent Claim 22 words

The composite of claim 1 wherein said charged gaseous atmosphere is a corona discharge operating at 250 to 600 joules per second.

Claim 9

Dependent Claim 24 words

The composite of claim 1 wherein said fluoropolymer substrate is moving through the charged atmosphere at a rate of 1 to 50 linear feet/minute.

Claim 10

Dependent Claim 15 words

The composite of claim 1 wherein said ionizing takes place at ambient temperature and pressure.

Claim 11

Dependent Claim 14 words

The composite of claim 1 wherein said composite is a fuel vapor carrying tube.

References Cited (Backward Citations)

CA686119A Cited

US3017339A Cited

DE1290717B Cited

US3133854A Cited

US3352714A Cited

US3473087A Cited

US3455774A Cited

US3457139A Cited

US3507763A Cited

US3676181A Cited

US4272585A Cited

JPS5358588A Cited

US4330017A Cited

US4188426A Cited

US4293663A Cited

US4343861A Cited

US4353763A Cited

JPS5738272A Cited

US4358559A Cited

JPS58114979A Cited

JPS58201613A Cited

US5051978A Cited

US4995028A Cited

US4564662A Cited

US4634615A Cited

US4654235A Cited

US4743327A Cited

DE3524631A1 Cited

EP0185590A2 Cited

US4636272A Cited

US4603712A Cited

US4943473A Cited

US4758455A Cited

US4748204A Cited

US4718568A Cited

JPS62162542A Cited

US4800109A Cited

US4749610A Cited

JPS639533A Cited

US4770929A Cited

US4731156A Cited

US4933060A Cited

JPS63224943A Cited

GB2204932A Cited

US4826731A Cited

US4887647A Cited

US4898638A Cited

JPH01154755A Cited

JPH01174442A Cited

JPH02107371A Cited

US5008340A Cited

US5059480A Cited

US5141800A Cited

US5124878A Cited

EP0385731A1 Cited

US5056512A Cited

US5081326A Cited

DE3930350A1 Cited

JPH03114829A Cited

US5089200A Cited

US5077115A Cited

EP0479592A2 Cited

US5108780A Cited

US5170011A Cited

US5357005A Cited

US5284184A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1999-09-10	2000-03-11	2000-09-10	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2003-09-10	2004-03-11	2004-09-10	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2007-09-10	2008-03-11	2008-09-10	$7700.00	Window Closed / Lapsed

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