| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminated type expandable graphite sheet made by stacking an expandable graphite sheet with a flat polytetrafluoroethylene superior in mold releasability by using neither an adhesive nor a pressure sensitive adhesive to surely joint the expandable graphite sheet with the flat polytetrafluoroethylene. SOLUTION: The laminated type expandable graphite sheet which keeps the flat polytetrafluoroethylene overlying at least one face of the expandable graphite sheet, and the expandable graphite sheet described above and the flat polytetrafluoroethylene are directly fixed on a laminated interface. A peel strength on a fixed face between the flat polytetrafluoroethylene described above and the expandable graphite sheet described above shows a strength almost higher than a cohesive failure strength of the expandable graphite sheet. COPYRIGHT: (C)2008,JPO&INPIT
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