Plastic pipe having an oxygen-impermeable casing

US4593853A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Alfred Schad · Wiesbaden, DE
• Klaus Heyse · Bad Soden, DE

Key dates

• Filing date: Oct 11, 1983
• Grant date: Jun 10, 1986
• Expiry date: Oct 11, 2003

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02B30/00
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

A plastic pipe comprising an oxygen-impermeable casing, wherein the casing comprises a barrier layer for oxygen, and an adhesive layer adjacent to the circumferential surface of the pipe and attached to the circumferential surface by an sealed bond, wherein the casing surrounds the circumferential surface on all sides, and wherein the barrier layer is elastic, is substantially impermeable to oxygen and comprises a polyvinyl alcohol, a vinyl alcohol/ethylene copolymer, or polyacrylonitrile. Also disclosed is a process for the production of the pipe and a use of the pipe as a heating pipe.