PVC-free multilayer tube for medical purposes, process for the production thereof and use

US5928744A · kind A · utility

Assignee

• Fresenius AG · DE

Inventors

• Klaus Heilmann · Sankt Wendel, DE
• Thomas Nicola · Ingelheim am Rhein, DE

Key dates

• Filing date: Aug 15, 1996
• Grant date: Jul 27, 1999
• Expiry date: Aug 15, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31928
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

According to the invention, strong adhesion of the layers to each other and simple formation of a strong and leakproof connection with bags or connectors made from polypropylene or polycarbonate during steam sterilisation is achieved by the first plastic material containing at least one polymer which is dimensionally stable at temperatures of .gtoreq.121.degree. C., while the second plastic material contains at least one polymer which is no longer dimensionally stable at temperatures of .gtoreq.121.degree. C. A layer C) (2) is optionally present, the plastic material of which contains at least one polymer which is dimensionally stable at temperatures of .gtoreq.121.degree. C. The invention can be used for medical purposes, in particular as a fluid line in dialysis, infusion or artificial feeding, primarily in connection with connectors or medical bags.