| 摘要 |
PURPOSE: A high-purity expanded graphite sheet having flexibility, a method of producing the sheet, and a method of manufacturing expanded graphite sheets which is suited for mass production as well are provided. CONSTITUTION: The flexible, high-purity expanded graphite sheet is characterized in that it has an impurity content not exceeding 10 ppm and such a degree of flexibility that a sample thereof, 10x100 mm in size, can withstand at least 10 times of bending in a flexibility test comprising repeatedly bending the sample, with a 50-g weight suspended from one end thereof, by means of bending bodies with a diameter of 6 mm, wherein the flexible, high-purity expanded graphite sheet has a bulk density of 0.5 to 1.3 g/cm¬3, and wherein the flexible, high-purity expanded graphite sheet has a thickness of 0.2 to 1.0 mm. The method of producing flexible, high-purity expanded graphite sheets comprises forming an expanded graphite sheet having a bulk density of 0.7 to 1.3 g/cm¬3 into a desired shape, and then subjecting the shaped sheet to treatment for attaining high purity. |
