Fluoropolymer composite tube and method of preparation
US6517657B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 2000 |
| Grant date | Feb 11, 2003 |
| Priority date | — |
| Expiry date | Dec 3, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L2011/047
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Described herein is a method of preparing a fluoropolymer composite comprising the steps of activating the fluoropolymer substrate and thereafter applying a layer of a different polymer to the activated fluoropolymer substrate. The activation step can be described as a mixed gas plasma discharge or an electrically formed plasma. Also described herein are other methods of surface activation including exposure to excimer laser, gamma rays, x-ray flux, electron beam, sodium naphthalate bath, coupling or curing agents, and others. In particular, described is a fuel pipe comprised of an inner fluorocarbon layer having electrostatic discharge resistance and hydrocarbon evaporative emission resistance chemically bonded to an outer layer of a cross-linked polyethylene polymer. There is no need for additional adhesives. Fluoropolymer layers have excellent chemical resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.