| 摘要 |
The invention relates to a sealing material made of expanded graphite and a method of producing it. In the sealing material made of expanded graphite of the invention, a surface layer portion of an expanded graphite base material 11 in which expanded graphite particles 1 are pressurized is subjected to a blast process or the like, whereby the weight of the expanded graphite base material 11 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 11 is in a range of 26.52 to 26.48. In such an sealing material made of expanded graphite, the elongation rate and the tensile strength are improved, and also the flexibility is remarkably improved. Therefore, also extension of the application range of a product and improvement of the productivity of a product can be attained. 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. <IMAGE> |
