Packing yarn made of graphite foil and metal foil and method of manufacturing a packing yarn

US6385956B1 · kind B1 · utility

Assignee

• SGL Technik GmbH · DE

Inventors

• Oswin Öttinger · Meitingen, DE
• Bernd Schellenberger · Gersthofen, DE

Key dates

• Filing date: Jun 28, 1999
• Grant date: May 14, 2002
• Expiry date: Jun 28, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2922
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A packing yarn and a method of manufacturing a packing yarn composed of at least two bands which are at most 5 mm wide and are joined together by a yarn manufacturing method, include forming the bands of a laminate having at least one layer of flexible graphite and at least one layer of a metal foil with a tensile strength of at least 250 MPa. The layers of graphite foil and metal foil are joined by adhesion or through the use of a non-adhesive-like coupling agent. The bands are produced from the laminates by cutting, which is preferably effected continuously. Advantages thereof are that strips or bands of flexible graphite, which have a tensile strength that is totally inadequate for the manufacture of packing yarns, are altered in terms of their mechanical properties. That is performed solely through reinforcement with a metal foil and without using further reinforcing agents such as, for example, yarns, fibers or wires, in such a way that they may be processed by known methods into packing yarns in an efficient manner.