Sealing made of expanded graphite, a method of producing it

摘要

The invention provides: an expanded graphite sealing material in which the adaptability of the principal face of an expanded graphite base member is improved, the bonding strength to a coating layer and the like can be increased, and the sealing properties can be enhanced; a method of producing such a sealing material; and a gasket sheet using the sealing material. On at least a portion of a principal face 11a of an expanded graphite base member 11 in which expanded graphite particles 1a are pressurized and integrated together, opened thin-leaf graphite portions 12 are formed. The principal face 11a of the expanded graphite base member 11 having the thin-leaf graphite portions can be impregnated with a sealing member such as PTFE or covered with a coating layer. As the form of the sealing material, a sheet, a press-molded product, a fabric, a string, or a braided article can be adopted.