Sealing material made of expanded graphite and a method of producing the same
US6027809A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 1998 |
| Grant date | Feb 22, 2000 |
| Priority date | — |
| Expiry date | Feb 18, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a sealing material made of expanded graphite and to a method of producing it. In the sealing material made of expanded graphite of the present invention, a surface layer portion of an expanded graphite base material in which expanded graphite particles are pressurized is subjected to a blast process or the like, whereby the weight of the expanded graphite base material is reduced by a range of 0.5 to 3%, so that the diffraction peak of an X-ray diffraction of the exposed surface layer portion of the expanded graphite base material is in a range of 26.52.degree. to 26.48.degree.. In such a sealing material made of expanded graphite, the elongation rate and the tensile strength are improved, and also flexibility is remarkably improved. As a result, the product application range is extended and product productivity are improved. The sealing material may be preferably used in various kinds of sealing members for high-temperature use such as a packing, a gasket, a V-shaped ring, and a valve seat, and a sliding material such as a bearing, or a heat insulating material for a high temperature vacuum furnace.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.