Flat sealing material in the form of a reinforced composite film
US7914882B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2004 |
| Grant date | Mar 29, 2011 |
| Priority date | — |
| Expiry date | Sep 23, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24942
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a stable high-performance flat sealing material for application at a temperature up to 330° C. which is compacted by heat and pressure in such a way that a composite film, i.e. a reinforced (fibrous) film is obtainable by compressing one or several non-woven fabrics or one or several non-woven mat weaves at a predetermined pressure and temperature. The inventive flat sealing material is suitable for highly stressed joints, in particular for cylinder head gaskets. The thus produced composite film or the (fiber and/or binder) reinforced film has the layer thicknesses ranging from 0.01 to 3.0 mm obtainable in one operation from one or several non-woven fabric layers, thereby making it possible for the first time to obtain the layer thicknesses of 0.01 mm using the inventive materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.